ERV IOM - 400 to 4,000 cfm

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ERV IOM - 400 to 4,000 cfm
ERV
Energy Recovery Ventilators
Installation, Operation and Maintenance Instructions Manual
Capacity: 400 to 4,000 cfm
Model: ERV500i/e, ERV1000i, ERV1500i/e,
ERV2000i/e, ERV3000i/e
©2013 Venmar CES Inc.
Table of Contents
Nomenclature.......................................................................................................................................................................3
Safety Considerations........................................................................................................................................................12
General Information..........................................................................................................................................................12
Recommended Spare Parts..........................................................................................................................................12
Inspection on Arrival....................................................................................................................................................13
Unit Application Limitations.......................................................................................................................................13
Installation..........................................................................................................................................................................13
Unit Location Requirements........................................................................................................................................13
Ceiling Mount (ERV500i, ERV1000i and ERV2000i only)............................................................................................14
Floor Mount.................................................................................................................................................................14
Roofcurbs Supplied by Venmar CES............................................................................................................................15
Roofcurbs Supplied by Others.....................................................................................................................................15
Rigging and Lifting the Unit.......................................................................................................................................16
Exhaust Dampers for Indoor Units..............................................................................................................................16
Field Fabricated Ductwork..........................................................................................................................................16
Hood Installation.........................................................................................................................................................17
Access Panel Handles...................................................................................................................................................18
Internal Packaging.......................................................................................................................................................18
Coil Piping Connections (ERV3000i/e Only)................................................................................................................18
Condensate Drain Trap (ERV3000i/e Only).................................................................................................................18
Systems Integration.....................................................................................................................................................19
Electrical Connections..................................................................................................................................................20
Start-up...............................................................................................................................................................................21
Pre Start-up Procedure................................................................................................................................................21
Start-up Procedure.......................................................................................................................................................21
Frost Control.................................................................................................................................................................23
Sequence of Operation................................................................................................................................................23
Airflow Balancing........................................................................................................................................................24
Maintenance.......................................................................................................................................................................24
Air Filters......................................................................................................................................................................24
Interior of Unit.............................................................................................................................................................25
Fans...............................................................................................................................................................................26
Enthalpy Wheel............................................................................................................................................................28
Testing and Replacement of the Damper Actuator...................................................................................................30
Coils...............................................................................................................................................................................31
System Operation Check..............................................................................................................................................31
Appendix A: Roofcurb Detail............................................................................................................................................32
Appendix B: Dimensional Drawings..................................................................................................................................36
Appendix C: Rigging Drawing...........................................................................................................................................45
Appendix D: Typical Installations......................................................................................................................................47
Appendix E: Hood Installation..........................................................................................................................................49
Appendix F: Components..................................................................................................................................................50
Appendix G: Terminal Control Diagrams..........................................................................................................................55
Appendix H: Troubleshooting...........................................................................................................................................60
Appendix I: Equipment Data.............................................................................................................................................62
Appendix J: Electrical Data................................................................................................................................................63
Appendix K: Enthalpy Wheel Pressure Drop vs. Flow Formulae and Tables..................................................................65
Appendix L: Maintenance Summary Chart.......................................................................................................................66
Appendix M: ERV500–3000 Start-up Form and Checklist................................................................................................67
Appendix N: Effect of Undersized Straight Duct and Elbows on Forward Curved Fans................................................71
Manufacturer reserves the right to discontinue or change specifications or designs without notice or obligation.
VCES-ERV-IOM-4A – ERV500–3000
2
Nomenclature
ERV500i Indoor Unit Nomenclature (400–700 cfm)
1
2
3
4
5
6
1. FROST CONTROL
D – Recirc defrost1
E – Exhaust only2
C – Non-defrost
N – Non-defrost, no wall control compatibility
2. VOLTAGE/SPEED
A – 120/1/60
3. INTERNAL PROTECTION
1 – 1” insulation, single wall
2 – 1” insulation, double wall
4. SENSOR CONTACTS
W – Wheel rotation sensor3
X – No sensor
5. EXTERNAL FINISH
S – Standard galvanized package
W – White prepaint package
7
8
9
10
10. ENERGY RECOVERY
1 – Aluminum wheel, no purge
9. FREE COOLING
S – Setpoint enthalpy controller
D – Differential enthalpy controller
T – Thermostat (dry bulb)
X – No free cooling controller
8. FILTRATION
S – Supply filter
E – Exhaust filter
B – Supply and exhaust filters
X – No filtration
7. EXTERNAL DISCONNECT
N – Non-fused disconnect switch4
X – No disconnect switch
6. OUTSIDE AIR DAMPER
1 – Insulated motorized
2 – Insulated spring return
3 – No damper
Notes:
1 When ordering recirc defrost, you must order an outside air damper. Recirc defrost option includes recirculation dry contacts for unoccupied mode.
2 Outside air damper required.
3 Units ordered with the wheel rotation sensor option must include a frost control option other than ‘N’.
4 Non-fused disconnect switch is field installed.
©Venmar CES Inc. 2013. All rights reserved throughout the world.
Illustrations cover the general appearance of Venmar CES products at the time of publication and Venmar CES reserves the
right to make changes in design and construction at any time without notice.
CES Group, LLC d/b/a Venmar CES furnishes equipment pursuant to its then-current Terms and Conditions of Sale and Limited Warranty, copies of which can be found under the Terms & Conditions of Sale and Warranty link at www.ces-group.com.
Extended warranties, if any, shall be as offered and acknowledged in writing by Venmar CES.
VCES-ERV-IOM-4A – ERV500–3000
3
ERV500e Outdoor Unit Nomenclature (400–700 cfm)
1
2
3
4
5
6
7
8
9
10
11
12
13
1. FROST CONTROL
E – Exhaust only1
C – Non-defrost
N – Non-defrost, no wall
control compatibility
2. VOLTAGE/SPEED
B – 208/120/1/60 – one-speed2
C – 230/120/1/60 – one-speed2
3. INTERNAL PROTECTION
1 – 1” insulation, single wall
2 – 1” insulation, double wall
4. SENSOR CONTACTS
W – Wheel rotation sensor3
X – No contacts, no sensor
5. EXTERNAL FINISH
G – Grey prepaint package
6. OUTSIDE AIR DAMPER
1 – Non-insulated motorized
2 – Insulated motorized
3 – Insulated spring return
4 – No damper
7. EXHAUST AIR DAMPER
1 – Backdraft (low leak)
2 – Non-insulated motorized (low leak)
3 – Insulated motorized (low leak)
4 – No damper
14
14. ENERGY RECOVERY
1 – Aluminum wheel, no purge
13. FREE COOLING
S – Setpoint enthalpy controller
D – Differential enthalpy controller
T – Thermostat (dry bulb)
X – No free cooling controller
12. FILTRATION
S – Supply filter
E – Exhaust filter
B – Supply and exhaust filters
X – No filtration
11. RETURN AIR
B – Bottom return air
S – Side return air
10. SUPPLY DISCHARGE
D – Down supply discharge
E – End supply discharge
9. HOODS
H – Intake/exhaust hoods
X – No hoods5
8. EXTERNAL DISCONNECT
N – Non-fused disconnect switch4
X – No disconnect switch
Notes:
1 Outside air damper required.
2 Requires a neutral wire with L1 and L2.
3 Units ordered with the wheel rotation sensor option must include a frost control option other than ‘N’.
4 Non-fused disconnect switch is field installed.
5 Must order hoods when ordering dampers.
VCES-ERV-IOM-4A – ERV500–3000
4
ERV1000i Indoor Unit Nomenclature (700–1,381 cfm)
1
2
1. FROST CONTROL
D – Recirc defrost1
E – Exhaust only2
V – VSD frost prevention, no
wall control compatibility
W– VSD frost prevention
C – Non-defrost
N – Non-defrost, no wall
control compatibility3
2. VOLTAGE/SPEED
A – 120/1/60 – two-speed4
B – 208/120/1/60 – two-speed4/5
C – 230/120/1/60 – two-speed4/5
D – 208/3/60 – one-speed4
E – 230/3/60 – one-speed4
F – 460/3/60 – one-speed4
3. INTERNAL PROTECTION
1 – 1” insulation, single wall
2 – 1” insulation, double wall
4. SENSOR CONTACTS
D – Dirty filter contacts
W– Wheel rotation sensor6
B – Dirty filter contacts and wheel rotation sensor6
X – No contacts, no sensor
5. EXTERNAL FINISH
S – Standard galvanized package
W– White prepaint package
6. OUTSIDE AIR DAMPER
1 – Insulated motorized7
2 – Insulated spring return7
3 – Non-insulated motorized8
4 – Non-insulated spring return8
5 – No damper
3
4
5
6
7
8
9
10
11
12
13
13. ENERGY RECOVERY
1 – Aluminum wheel, no purge
2 – Aluminum wheel c/w purge
12. CASSETTE ACCESS
R – Reverse cassette access
S – Standard cassette access
11. LOW SPEED
L – Reduced low speed
N – Normal low speed
X – No low speed
10. FREE COOLING
S – Setpoint for enthalpy controller
D – Differential enthalpy controller
T – Thermostat (dry bulb)
X – No free cooling controller
9. FILTRATION
S – Supply filter
E – Exhaust filter
B – Supply and exhaust filters
X – No filtration
8. EXTERNAL DISCONNECT
F – Fused disconnect switch9
N – Non-fused disconnect switch9
X – No disconnect switch
7. DOOR FASTENERS
S – Standard filter door c/w screws
D – Deluxe filter door c/w quarter turn
fasteners
Notes:
1 When ordering recirc defrost, you must order an insulated outside air damper. Recirc defrost option includes recirculation dry contacts for unoccupied mode.
Includes exhaust backdraft.
2 Outside air damper required.
3 No damper required.
4 Single-phase motors are available with low speed options ‘L’ or ‘N’. Three-phase motors are only available with low speed option ‘X’.
5 Requires a neutral wire with L1 and L2.
6 Units ordered with the wheel rotation sensor option must include a frost control option other than ‘V’ or ‘N’.
7 This option is for recirc defrost units only.
8 This option cannot be ordered on recirc defrost units.
9 Fused/non-fused disconnect switch is field installed.
VCES-ERV-IOM-4A – ERV500–3000
5
ERV1500i Indoor Unit Nomenclature (800–2,000 cfm)
1
1. FROST CONTROL
D – Recirc defrost1
E – Exhaust only2
V – VSD frost prevention, no
wall control compatibility
W– VSD frost prevention
M– Pre-heat – 8 kW, two-stage3
O– Pre-heat – 8 kW, four-stage3
P – Pre-heat – 8 kW, SCR3
Q– Pre-heat – 14 kW, two-stage3
R – Pre-heat – 14 kW, four-stage3
S – Pre-heat – 14 kW, SCR3
T – Pre-heat – 20 kW, two-stage3
U – Pre-heat – 20 kW, four-stage3
Y – Pre-heat – 20 kW, SCR3
C – Non-defrost
N – Non-defrost, no wall
control compatibility4
2. VOLTAGE/SPEED
A – 120/1/60 – one-speed
B – 208/120/1/60 – one-speed5
C – 230/120/1/60 – one-speed5
D – 208/3/60 – one-speed
E – 230/3/60 – one-speed
F – 460/3/60 – one-speed
G – 575/3/60 – one-speed
H – 208/120/1/60 – two-speed5
I – 230/120/1/60 – two-speed5
N – 208/3/60 – VFD6
O– 230/3/60 – VFD6
P – 460/3/60 – VFD6
Q– 575/3/60 – VFD6
3. INTERNAL PROTECTION
1 – 1” insulation, single wall
2 – 1” insulation, double wall
4. SENSOR CONTACTS
D – Dirty filter contacts
W– Wheel rotation sensor7
B – Dirty filter contacts and
wheel rotation sensor7
X – No contacts, no sensor
5. EXTERNAL FINISH
S – Standard galvanized package
W– White prepaint package
2
3
4
5
6
7
8
9
10
11
12
13
14
15
15. ENERGY RECOVERY
1 – Aluminum wheel, no purge
2 – Aluminum wheel c/w purge
14. FREE COOLING
S – Setpoint enthalpy controller
D – Differential enthalpy controller
T – Thermostat (dry bulb)
X – No free cooling controller
13. FILTRATION
S – Supply filter
E – Exhaust filter
B – Supply and exhaust filters
X – No filtration
12. RETURN AIR
B – Bottom return air
E – End return air
T – Top return air
11. SUPPLY DISCHARGE
D – Down supply discharge
E – End supply discharge
T – Top supply discharge
10. EXHAUST DISCHARGE
E – End exhaust discharge
T – Top exhaust discharge
S – Side exhaust discharge
9. EXTERNAL DISCONNECT
F – Fused disconnect switch9
N – Non-fused disconnect switch9
X – No disconnect switch
8. DOOR FASTENERS
S – Standard blower door and filter door
c/w metal handles and screws
D – Deluxe blower door and filter door
c/w polyamide handles and quarter
turn fasteners
7. EXHAUST AIR DAMPER8
1 – Backdraft (low leak)
2 – Non-insulated motorized (low leak)
3 – Insulated motorized (low leak)
4 – No damper
6. OUTSIDE AIR DAMPER
1 – Insulated motorized
2 – Insulated spring return
3 – No damper
Notes:
1 When ordering recirc defrost, you must order outside air and exhaust air dampers. Recirc defrost option includes recirculation dry contacts for unoccupied mode.
2 Outside air damper required.
3 120/1/60, 208/1/60 and 230/1/60 voltages are not available with pre-heat frost control options.
4 No dampers required.
5 Requires a neutral wire with L1 and L2.
6 All VFD options include one controller per motor.
7 Units ordered with the wheel rotation sensor option must include a frost control option other than ‘V’ or ‘N’.
8 Exhaust air damper must be field installed in exhaust duct.
9 Fused/non-fused disconnect switch is field installed.
VCES-ERV-IOM-4A – ERV500–3000
6
ERV1500e Outdoor Unit Nomenclature (800–2,000 cfm)
1
1. FROST CONTROL
D – Recirc defrost1
E – Exhaust only2
V – VSD frost prevention, no
wall control compatibility
W– VSD frost prevention
M– Pre-heat – 8 kW, two-stage3
O– Pre-heat – 8 kW, four-stage3
P – Pre-heat – 8 kW, SCR3
Q– Pre-heat – 14 kW, two-stage3
R – Pre-heat – 14 kW, four-stage3
S – Pre-heat – 14 kW, SCR3
T – Pre-heat – 20 kW, two-stage3
U – Pre-heat – 20 kW, four-stage3
Y – Pre-heat – 20 kW, SCR3
C – Non-defrost
N – Non-defrost, no wall
control compatibility4
2. VOLTAGE/SPEED
A – 120/1/60 – one-speed
B – 208/120/1/60 – one-speed5
C – 230/120/1/60 – one-speed5
D – 208/3/60 – one-speed
E – 230/3/60 – one-speed
F – 460/3/60 – one-speed
G – 575/3/60 – one-speed
H – 208/120/1/60 – two-speed5
I – 230/120/1/60 – two-speed5
N – 208/3/60 – VFD6
O– 230/3/60 – VFD6
P – 460/3/60 – VFD6
Q– 575/3/60 – VFD6
3. INTERNAL PROTECTION
1 – 1” insulation, single wall
2 – 1” insulation, double wall
4. SENSOR CONTACTS
D – Dirty filter contacts
W– Wheel rotation sensor7
B – Dirty filter contacts and
wheel rotation sensor7
X – No contacts, no sensor
5. EXTERNAL FINISH
G – Grey prepaint package
2
3
4
5
6
7
8
9
10
11
12
13
14
15
15. ENERGY RECOVERY
1 – Aluminum wheel, no purge
2 – Aluminum wheel c/w purge
14. FREE COOLING
S – Setpoint enthalpy controller
D – Differential enthalpy controller
T – Thermostat (dry bulb)
X – No free cooling controller
13. FILTRATION
S – Supply filter
E – Exhaust filter
B – Supply and exhaust filters
X – No filtration
12. RETURN AIR
B – Bottom return air
E – End return air
11. SUPPLY DISCHARGE
D – Down supply discharge
E – End supply discharge
10. HOODS
H – Intake/exhaust hoods
X – No hoods9
9. EXTERNAL DISCONNECT
F – Fused disconnect switch8
N – Non-fused disconnect switch8
X – No disconnect switch
8. DOOR FASTENERS
S – Standard blower door and filter door
c/w metal handles and screws
D – Deluxe blower door and filter door
c/w polyamide handles and quarter
turn fasteners
7. EXHAUST AIR DAMPER
1 – Backdraft (low leak)
2 – Non-insulated motorized (low leak)
3 – Insulated motorized (low leak)
4 – No damper
6. OUTSIDE AIR DAMPER
1 – Insulated motorized
2 – Insulated spring return
3 – No damper
Notes:
1 When ordering recirc defrost, you must order outside air and exhaust air dampers. Recirc defrost option includes recirculation dry contacts for unoccupied mode.
2 Outside air damper required.
3 208/1/60 and 230/1/60 voltages are not available with pre-heat frost control options.
4 No dampers required.
5 Requires a neutral wire with L1 and L2.
6 All VFD options include one controller per motor.
7 Units ordered with the wheel rotation sensor option must include a frost control option other than ‘V’ or ‘N’.
8 Fused/non-fused disconnect switch is field installed.
9 Must order hoods when ordering dampers.
VCES-ERV-IOM-4A – ERV500–3000
7
ERV2000i Indoor Unit Nomenclature (1,200–2,800 cfm)
1
1. FROST CONTROL
D – Recirc defrost1
E – Exhaust only2
V – VSD frost prevention, no
wall control compatibility
W – VSD frost prevention
C – Non-defrost
N – Non-defrost, no wall
control compatibility3
2. VOLTAGE/SPEED
B – 208/120/1/60 – one-speed4
C – 230/120/1/60 – one-speed4
D – 208/3/60 – one-speed
E – 230/3/60 – one-speed
F – 460/3/60 – one-speed
G – 575/3/60 – one-speed
N – 208/3/60 – VFD9/10
O – 230/3/60 – VFD9/10
P – 460/3/60 – VFD9/10
3. INTERNAL PROTECTION
1 – 1” insulation, single wall
2 – 1” insulation, double wall
4. SENSOR CONTACTS
D – Dirty filter contacts
W – Wheel rotation sensor5
B – Dirty filter contacts and
wheel rotation sensor5
X – No contacts, no sensor
5. EXTERNAL FINISH
S – Standard galvanized package
W – White prepaint package
2
3
4
5
6
7
8
9
10
11
12
12. ENERGY RECOVERY
1 – Aluminum, no purge
2 – Aluminum wheel c/w purge
11. CASSETTE ACCESS
R – Reverse cassette access
S – Standard cassette access
10. FREE COOLING
S – Setpoint enthalpy controller
D – Differential enthalpy controller
T – Thermostat (dry bulb)
X – No free cooling controller
9. FILTRATION
S – Supply filter
E – Exhaust filter
B – Supply and exhaust filters
X – No filtration
8. EXTERNAL DISCONNECT
F – Fused disconnect switch8
N – Non-fused disconnect switch8
X – No disconnect switch
7. DOOR FASTENERS
S – Standard filter door c/w screws
D – Deluxe filter door c/w quarter turn
fasteners
6. OUTSIDE AIR DAMPER
1 – Insulated motorized6
2 – Insulated spring return6
3 – Non-insulated motorized7
4 – Non-insulated spring return7
5 – No damper
Notes:
1 When ordering recirc defrost, you must order outside air and exhaust air dampers. Recirc defrost option includes recirculation dry contacts for unoccupied mode.
Includes exhaust backdraft.
2 Outside air damper required.
3 No dampers required.
4 Requires a neutral wire with L1 and L2.
5 Units ordered with the wheel rotation sensor option must include a frost option other than ‘V’ or ‘N’.
6 This option is for recirc defrost units only.
7 This option cannot be ordered on recirc defrost units.
8 Fused/non-fused disconnect switch is field installed.
9 All VFD options include one controller per motor.
10 Minimum motor size is 1 hp.
VCES-ERV-IOM-4A – ERV500–3000
8
ERV2000e Outdoor Unit Nomenclature (1,200–2,800 cfm)
1
1. FROST CONTROL
D – Recirc defrost1
E – Exhaust only2
V – VSD frost prevention, no
wall control compatibility
W – VSD frost prevention
C – Non-defrost
N – Non-defrost, no wall
control compatibility
2. VOLTAGE/SPEED
B – 208/120/1/60 – one-speed4
C – 230/120/1/60 – one-speed4
D – 208/3/60 – one-speed
E – 230/3/60 – one-speed
F – 460/3/60 – one-speed
G – 575/3/60 – one-speed
N – 208/3/60 – VFD8/9/10
O – 230/3/60 – VFD8/9/10
P – 460/3/60 – VFD8/9/10
3. INTERNAL PROTECTION
1 – 1” insulation, single wall
2 – 1” insulation, double wall
4. SENSOR CONTACTS
D – Dirty filter contacts
W – Wheel rotation sensor5
B – Dirty filter contacts and
wheel rotation sensor5
X – No contacts, no sensor
5. EXTERNAL FINISH
G – Grey prepaint package
6. OUTSIDE AIR DAMPER
1 – Non-insulated motorized (low leak)
2 – Insulated motorized (low leak)
3 – Insulated spring return (low leak)
4 – No damper
2
3
4
5
6
7
8
9
10
11
12
13
14
15
15. ENERGY RECOVERY
1 – Aluminum wheel, no purge
2 – Aluminum wheel c/w purge
14. FREE COOLING
S – Setpoint enthalpy controller
D – Differential enthalpy controller
T – Thermostat (dry bulb)
X – No free cooling controller
13. FILTRATION
S – Supply filter
E – Exhaust filter
B – Supply and exhaust filters
X – No filtration
12. RETURN AIR
B – Bottom return air
E – End return air
11. SUPPLY DISCHARGE
D – Down supply discharge
E – End supply discharge
10. HOODS
H – Intake/exhaust hoods
X – No hoods7
9. EXTERNAL DISCONNECT
F – Fused disconnect switch6
N – Non-fused disconnect switch6
X – No disconnect switch
8. DOOR FASTENERS
S – Standard blower door and filter door
c/w metal handles and screws
D – Deluxe blower door and filter door
c/w polyamide handles and quarter
turn fasteners
7. EXHAUST AIR DAMPER
1 – Backdraft (low leak)
2 – Non-insulated motorized (low leak)
3 – Insulated motorized (low leak)
4 – No damper
Notes:
1 When ordering recirc defrost, you must order outside air and exhaust air dampers. Recirc defrost option includes recirculation dry contacts for unoccupied mode.
2 Outside air damper required.
3 No dampers required.
4 Requires a neutral wire with L1 and L2.
5 Units ordered with the wheel rotation sensor option must include a frost control option other than ‘V’ or ‘N’.
6 Fused/non-fused disconnect switch is field installed.
7 Must order hoods when ordering dampers.
8 All VFD options include one controller per motor.
9 Minimum motor size 1 hp.
10 For selection below −22ºF [−30ºC], please consult factory.
VCES-ERV-IOM-4A – ERV500–3000
9
ERV3000i Indoor Unit Nomenclature (2,000–4,000)
1
2
3
4
1. FROST CONTROL
D – Recirc defrost1
E – Exhaust only2
V – VSD frost prevention, no
wall control compatibility
W – VSD frost prevention
M – Pre-heat – 20 kW, two-stage3
O – Pre-heat – 20 kW, four-stage3
P – Pre-heat – 20 kW, SCR3
Q – Pre-heat – 30 kW, two-stage3
R – Pre-heat – 30 kW, four-stage3
S – Pre-heat – 30 kW, SCR3
T – Pre-heat – 40 kW, two-stage3
U – Pre-heat – 40 kW, four-stage3
Y – Pre-heat – 40 kW, SCR3
A – Pre-heat w/ unocc. recirc –
20 kW, two-stage1/3/4
B – Pre-heat w/ unocc. recirc –
20 kW, four-stage1/3/4
F – Pre-heat w/ unocc. recirc –
20 kW, SCR1/3/4
G – Pre-heat w/ unocc. recirc –
30 kW, two-stage1/3/4
H – Pre-heat w/ unocc. recirc –
30 kW, four-stage1/3/4
I – Pre-heat w/ unocc. recirc –
30 kW, SCR1/3/4
J – Pre-heat w/ unocc. recirc –
40 kW, two-stage1/3/4
K – Pre-heat w/ unocc. recirc –
40 kW, four-stage1/3/4
L – Pre-heat w/ unocc. recirc –
40 kW, SCR1/3/4
C – Non-defrost
N – Non-defrost, no wall
control compatibility5
2. VOLTAGE/SPEED
B – 208/120/1/60 – one-speed6
C – 230/120/1/60 – one-speed6
D – 208/3/60 – one-speed
E – 230/3/60 – one-speed
F – 460/3/60 – one-speed
G – 575/3/60 – one-speed
H – 208/120/1/60 – two-speed6
I – 230/120/1/60 – two-speed6
N – 208/3/60 – VFD7
O – 230/3/60 – VFD7
P – 460/3/60 – VFD7
Q – 575/3/60 – VFD7
3. INTERNAL PROTECTION
1 – 1” insulation, single wall
2 – 1” insulation, double wall
4. SENSOR CONTACTS
D – Dirty filter contacts
W – Wheel rotation sensor8
B – Dirty filter contacts and wheel rotation sensor8
X – No contacts, no sensor
5. EXTERNAL FINISH
S – Standard galvanized package
W – White prepaint package
6. OUTSIDE AIR DAMPER
1 – Non-insulated motorized (low leak)
2 – Insulated motorized (low leak)
3 – Insulated spring return (low leak)
4 – No damper
5
6
7
8
9
10
11
12
13
14 15
16
17
18
19
20
20. COOLING
C – Chilled water11
D – Dx cooling11
X – No cooling
19. HEATING
H – Hot water
S – Steam heat
X – No heat
18. ENERGY RECOVERY
1 – Aluminum wheel, no purge
2 – Aluminum wheel c/w purge
17. BLOWER ISOLATION
R – Rubber blower isolation
S – Spring blower isolation
16. FREE COOLING
S – Setpoint enthalpy controller
D – Differential enthalpy controller
T – Thermostat (dry bulb)
X – No free cooling controller
15. HEF FILTRATION
H – High efficiency supply filter
X – No HEF filtration
14. MEF FILTRATION
S – MEF supply filter
E – MEF exhaust filter
B – MEF supply and exhaust filters
X – No MEF filtration
13. RETURN AIR
B – Bottom return air
E – End return air
T – Top return air
12. SUPPLY DISCHARGE
D – Down supply discharge
E – End supply discharge
T – Top supply discharge
11. EXHAUST DISCHARGE
E – End exhaust discharge
S – Side exhaust discharge
T – Top exhaust discharge
10. OUTSIDE AIR INTAKE
E – End outside air intake
T – Top outside air intake
S – Side outside air intake
9. EXTERNAL DISCONNECT
F – Fused disconnect switch10
N – Non-fused disconnect switch10
X – No disconnect switch
8. DOOR FASTENERS
S – Standard blower door and
filter door c/w metal handles
and screws
D – Deluxe blower door and filter
door c/w polyamide handles
and quarter turn fasteners
7. EXHAUST AIR DAMPER9
1 – Backdraft (low leak)
2 – Non-insulated motorized
(low leak)
3 – Insulated motorized (low leak)
4 – No damper
Notes:
1 When ordering recirc defrost or unoccupied recirc, you must order outside air and exhaust air dampers. Recirc defrost option includes recirculation dry contacts
for unoccupied mode.
2 Outside air damper required.
3 208/1/60 and 230/1/60 voltages are not available with pre-heat frost control options. 30 and 40 kW pre-heat frost control options are not available with 208/230/3/60 voltages.
4 Unoccupied recirc is not available with side outside air intake option.
5 No dampers required.
6 Requires a neutral wire with L1 and L2.
7 All VFD options include one controller per motor.
8 Units ordered with the wheel rotation sensor option must include a frost control option other than ‘V’ or ‘N’.
9 Exhaust air damper is supplied loose and must be field installed in exhaust duct.
10 Fused/non-fused disconnect switch is field installed.
11 A maximum of 2,650 cfm is allowed for cooling applications.
VCES-ERV-IOM-4A – ERV500–3000
10
ERV3000e Outdoor Unit Nomenclature (2,000–4,000)
1
2
3
1. FROST CONTROL
D – Recirc defrost1
E – Exhaust only2
V – VSD frost prevention no
wall control compatibility
W – VSD frost prevention
M – Pre-heat – 20 kW, two-stage3
O – Pre-heat – 20 kW, four-stage3
P – Pre-heat – 20 kW, SCR3
Q – Pre-heat – 30 kW, two-stage3/4
R – Pre-heat – 30 kW, four-stage3/4
S – Pre-heat – 30 kW, SCR3/4
T – Pre-heat – 40 kW, two-stage3/4
U – Pre-heat – 40 kW, four-stage3/4
Y – Pre-heat – 40 kW, SCR3/4
C – Non-defrost
N – Non-defrost, no wall
control compatibility5
2. VOLTAGE/SPEED
B – 208/120/1/60 – one-speed6
C – 230/120/1/60 – one-speed6
D – 208/3/60 – one-speed
E – 230/3/60 – one-speed
F – 460/3/60 – one-speed
G – 575/3/60 – one-speed
H – 208/120/3/60 – two-speed6
I – 230/120/1/60 – two-speed6
N – 208/3/60 – VFD7
O – 230/3/60 – VFD7
P – 460/3/60 – VFD7
Q – 575/3/60 – VFD7
3. INTERNAL PROTECTION
1 – 1” insulation, single wall
2 – 1” insulation, double wall
4. SENSOR CONTACTS
D – Dirty filter contacts
W – Wheel rotation sensor8
B – Dirty filter contacts and wheel
rotation sensor8
X – No contacts, no sensor
5. EXTERNAL FINISH
G – Grey prepaint package
6. OUTSIDE AIR DAMPER
1 – Non-insulated motorized (low leak)
2 – Insulated motorized (low leak)
3 – Insulated spring return (low leak)
4 – No damper
7. EXHAUST AIR DAMPER
1 – Backdraft (low leak)
2 – Non-insulated motorized (low leak)
3 – Insulated motorized (low leak)
4 – No damper
4
5
6
7
8
9
10
11
12
13
14 15
16
17
18
19
19. COOLING
C – Chilled water11
D – Dx cooling11
X – No cooling
18. HEATING
H – Hot water
S – Steam heat
X – No heat
17. ENERGY RECOVERY
1 – Aluminum wheel, no purge
2 – Aluminum wheel c/w purge
16. BLOWER ISOLATION
R – Rubber blower isolation
S – Spring blower isolation
15. FREE COOLING
S – Setpoint enthalpy controller
D – Differential enthalpy controller
T – Thermostat (dry bulb)
X – No free cooling controller
14. HEF FILTRATION
H – High efficiency supply filter
X – No HEF filtration
13. MEF FILTRATION
S – MEF supply filter
E – MEF exhaust filter
B – MEF supply and exhaust filters
X – No MEF filtration
12. RETURN AIR
B – Bottom return air
E – End return air
11. SUPPLY DISCHARGE
D – Down supply discharge
E – End supply discharge
10. HOODS
H – Intake/exhaust hoods
X – No hoods10
9. EXTERNAL DISCONNECT
F – Fused disconnect switch9
N – Non-fused disconnect switch9
X – No disconnect switch
8. DOOR FASTENERS
S – Standard blower door and
filter door c/w metal handles
and screws
D – Deluxe blower door and filter
door c/w polyamide handles
and quarter turn fasteners
Notes:
1 When ordering recirc defrost, you must order outside air and exhaust air dampers. Recirc defrost option includes recirculation dry contacts for unoccupied mode.
2 Outside air damper required.
3 208/1/60 and 230/1/60 voltages are not available with preheat frost control options.
4 30 and 40 kW pre-heat frost control options are not available with 208/230/3/60 voltages.
5 No dampers required.
6 Requires a neutral wire with L1 and L2.
7 All VFD options include one controller per motor.
8 Units ordered with the wheel rotation sensor option must include a frost control option other than ‘V’ or ‘N’.
9 Fused/non-fused disconnect switch is field installed.
10 Must order hoods when ordering dampers.
11 A maximum of 2,650 cfm is allowed for cooling applications.
VCES-ERV-IOM-4A – ERV500–3000
11
Safety Considerations
Warning, Caution and Important notes appear throughout this manual in specific and appropriate locations to
alert Installing Contractors and maintenance or service
personnel of potential safety hazards, possible equipment
damage or to alert personnel of special procedures or instructions that must be followed as outlined below.
!
WARNING
Identifies an instruction which, if not followed, might cause
serious personal injuries including possibility of death.
CAUTION
Identifies an instruction which, if not followed, might severely damage the unit, its components, the assembly or
final installation.
Hazards may exist within this equipment because it contains electrical and powerful moving components. Only
qualified service personnel should install or service this
equipment. Untrained personnel can perform basic maintenance such as maintaining filters. Observe precautions
marked in literature and on labels attached to the unit.
Follow all safety codes.
!
WARNING
Disconnect the main power switch to the unit before performing service or maintenance. Electric shock can cause
personal injury or death.
IMPORTANT
Indicates supplementary information needed to fully
complete an instruction or installation.
General Information
This manual is designed to provide general information
on the common operation of all standard and optional
components that may have been installed in the unit. Note
that some sections of this manual may not apply to your
unit. This manual has been designed for general purpose
and describes options offered by Venmar CES that could
be included in the unit. Consult the manual from the component Manufacturer if more detailed technical information about a specific component is required.
•
•
•
Instructions on certain options such as VFDs, enthalpy controllers and electric pre-heat coils which
are factory installed are placed inside a Ziploc bag
along with the IOM and located inside the unit.
Instructions for accessory items which are shipped
loose for field installation are included with the item.
The electrical schematic is attached to the inside of
the control panel.
Recommended Spare Parts
Spare parts should be ordered at the time the installation is accepted by the Owner. Spare parts will reduce
the down time in the event of a failure. The list of spare
parts outlined below is considered minimal. Installation in
remote locations or when the operation of heating equipment is essential may require more spare parts than listed.
Please contact the service department at Venmar CES for
recommendations.
VCES-ERV-IOM-4A – ERV500–3000
Minimum spare parts include:
•
•
•
Two sets of fuses
One matching set of fan belts
One set of filters
12
Inspection on Arrival
Inspect the equipment exterior and interior for any damage on arrival that may have occurred during unit shipment and for shipped loose parts. Ensure that there is
no damage to any protruding exterior components or to
internal components such as fans, motors, dampers, enthalpy wheel and structures. File a claim with the shipping
company if the unit is damaged. Check the packing slip
against all items received. If any items are missing, sign
the carrier’s bill of lading with the notation “Shipment
Received Less Item #___.” Contact the factory immediately
if damage is found. No return shipment will be accepted
without authorization.
IMPORTANT
The hoods for outdoor units are not installed from the
factory for shipping purposes and must be installed on
site. Hoods can be installed prior to rigging the unit or
after the unit is installed. See Rigging and Lifting the
Unit.
IMPORTANT
The exhaust dampers for indoor units (if ordered) are not
installed from the factory and must be installed on site.
See Exhaust Dampers for Indoor Units.
Unit Application Limitations
!
WARNING
Venmar CES equipment is not designed to be used for
temporary heating, cooling and/or ventilation during construction.
Using Venmar CES units for temporary ventilation during construction is subject to the unit warranty terms and
should be reviewed carefully before proceeding, as this
may void the standard warranty conditions.
Fine dust, larger particulate matter, solvents, varnishes and
other chemicals may cause filter clogging and elevated
cabinet pressures, higher power consumption and possible irreparable damage to the desiccant material of the
enthalpy wheel, which could reduce energy recovery performance of the wheel and also reduce the heat transfer
effectiveness of other components. Potential damages
include, but are not limited to, these examples.
Installation
Unit Location Requirements
Consult local building codes and electrical codes for special installation requirements and note additional requirements listed in this manual. In choosing the installation
location of the unit, consider the following factors:
•
•
•
•
The unit should be installed to allow easy access for
maintenance and for systems operation. See Appendix B for dimensions and recommended service and
maintenance clearances. Additional installation clearances on indoor unit are provided in Appendix D.
When possible, mount the unit over an unused area
such as a hallway. Although fans and motors are
mounted on vibration pads or isolators and are dynamically balanced, the unit will be even less perceptible if positioned away from busy offices.
Locate the unit in an area requiring the least amount
of ductwork and directional changes to allow optimum performance, to reduce pressure loss and to
use less electricity to achieve proper ventilation. Ductwork must be in accordance with ducting mechanical
rules to prevent sound issues and system effects.
In cold climates with −5°F [−20°C] design, an indoor
unit must be mounted in a dry area (not exceeding
VCES-ERV-IOM-4A – ERV500–3000
•
•
•
•
30% RH) to avoid water condensation on the cabinet
during winter operation. Alternatively, accommodation must be made for condensation on the cabinet
exterior. Do not mount units in an area where exposure to electrical panels or other hazards will occur.
On indoor units, a mounting location close to an exterior partition will minimize the length of insulated
ductwork required. Appendix D illustrates ductwork
through exterior partitions. These should be separated by a minimum of 10 feet [3,000 mm] for Class
2 exhaust or as required by ASHRAE 62.1 to avoid
outside cross contamination.
The fresh air intake hood must be positioned away
from sources of contamination such as hot chimneys
or kitchen exhaust vents.
Fresh air intake must also be positioned in a direction
opposite to that of prevailing winds to reduce entry
of snow or rain.
The unit should be mounted on a level foundation to
allow condensation to flow into internal drains (when
provided). The foundation must provide adequate
continuous support to minimize deflection of the unit
base frame to not more than 1/16” [1.6 mm] over
13
•
•
entire length. In addition to these recommendations,
a Structural Engineer must be involved to properly
size supporting structural elements.
When mounting the unit indoors and drain connections are required, mount the unit on a housekeeping pad of sufficient height to allow for drain trap
height and condensate lines to slope toward the
building drain. Install condensate pumps to reduce
height of housekeeping pads or drill holes in the concrete pad or mechanical room floor for sufficient trap
height.
When mounting the unit on a roofcurb check the
height from the finished roof to the bottom of the
intake hood. Consult with Local Authorities or your
building code for minimal intake hood height for
•
the water-tight height from and above the finished
roof and in snow prone areas the buildup of snow
to determine the height of the roofcurb. If additional
height is required from the finished roof to the top
of the roofcurb, to the bottom of the intake hood or
if other than level, custom height roofcurbs must be
ordered.
When mounting the unit on the roof, check for
possibility of exhaust re-entrainment which can be
caused by placing the unit in an equipment well or
within a recirculation zone created by the interaction
of the wind and resistance of the building, in which
case extension of the exhaust discharge or outdoor
intake may be required.
Ceiling Mount (ERV500i, ERV1000i and ERV2000i only)
The unit must be mounted level and may be hung with
threaded rod (field supplied) through the protruding frame
at the base of the unit. Hole centers are shown in the
overall dimensional drawings in Appendix B. Do not block
access to panels as indicated in Appendix D. Rubber or
seismic vibration isolation may be required in some regions
(field supplied and specified).
IMPORTANT
The Manufacturer recommends that the ERV1500i and
ERV3000i be floor mounted only.
Floor Mount
The unit may be secured to the floor using isolation/vibration pads. The pads may be located on each corner of the
unit’s frame (all mounting hardware is field supplied and
specified).
VCES-ERV-IOM-4A – ERV500–3000
14
Roofcurbs Supplied by Venmar CES
Roofcurbs supplied by Venmar CES should be mounted as
follows:
•
•
•
•
•
•
•
The roofcurb is shipped knocked-down with assembly hardware and instructions provided. The roofcurb
must be field erected, assembled and set in place by
the Installing Contractor.
Roofcurb dimensions are submitted with the unit mechanical drawings which can also be found in Appendix A and Appendix B which include clearances and
weights. Outdoor air intake, supply discharge, return
air inlet and exhaust air discharge opening locations
are identified in the equipment submittals or where
alternative locations are available from the nomenclature in the submittals or on the unit nameplate.
After the roofcurb has been assembled, ensure that
the roofcurb dimensions suit the unit for which it is
designated.
The cross members must be positioned as per the
roofcurb drawing to properly support the ductwork
plenums for bottom vertical return and supply connections and for stability.
Ensure that the assembled roofcurb is square, plumb
and level to within 1/16” [1.6 mm] over the entire
length. The building structure must provide continuous structural support to the full perimeter of the
roofcurb and may be shimmed.
The roofcurb must be fastened to the building
structure.
The Installing Contractor is responsible for making the
roofcurb water-tight by caulking all roofcurb joints.
IMPORTANT
The following items must be completed prior to setting
the unit on the roofcurb:
•
•
•
•
The roofcurb roofing must be completed including
insulation, cant strip, flashing and counter-flashing.
Vertical ductwork must be attached to the roofcurb and building structure, not to the unit. The
ductwork can be flanged over at the top of the
perimeter opening cross members and/or curb for
an air-tight seal. See Appendix A for information on
roofcurb, installation and dimensions.
If there is no building roof access underneath the
unit and drain or piping connections must be made
(in the roofing), it is recommended to do so before
unit installation using the appropriate materials provided by the Installing Contractor.
Remove the length of 3/8” [9.5 mm] polyvinyl gasket strip with adhesive backing supplied with the
roofcurb and apply a continuous strip to the top
perimeter of the roofcurb and ductwork opening
flanges/cross members for an air- and water-tight
seal as shown in Appendix A.
IMPORTANT
The gasket between the unit and the roofcurb is critical
for an air- and water-tight seal. An improperly applied
gasket can result in air and water leakage and poor unit
performance. Position the unit with equal spacing all
around between the roofcurb and inside unit base rail as
it is being lowered.
Roofcurbs Supplied by Others
Roofcurbs supplied by others must be designed with the
same dimensions and cross member arrangement as per
Venmar CES roofcurb drawings and must be designed to
evenly withstand perimeter and cross section static loads.
VCES-ERV-IOM-4A – ERV500–3000
IMPORTANT
Venmar CES is not liable for any damages, costs or other
issues arising from roofcurbs supplied by others.
15
Rigging and Lifting the Unit
IMPORTANT
The hoods for these units are not installed from the factory and must be installed on site. They can be installed
prior to rigging the unit or after the unit is installed.
Hoods are shipped on top of the unit. When rigging the
unit, make certain that the hoods are secured and are
not damaged by the spreader bars. See Appendix E for
hood installation.
Unit shall be lifted by cables attached to all the lifting
points provided on the unit base as shown in Appendix C.
For the ERV500e, a field supplied support beam such as a
“C” channel is required under and attached to the base
as shown in Figure C1. When lifting the unit use spreader
bars and cables to prevent damage to the unit casing.
Provide additional blocking and coverings (as required)
to prevent damage to the unit finish and/or components.
The spreader bars will help to maintain a certain distance
between the cables and the unit. Venmar CES will not
be responsible for any damage caused to the unit casing
during the lifting process. The lifting point must be at the
center of gravity to ensure that the unit is level during
hoisting and prior to setting. When commencing to hoist,
take up the slack in the hoisting cables slowly and gradually increase the cable tension until the full unit weight
is suspended. Avoid sudden, jerking movements. Do not
permit the unit to be suspended by the lifting lugs for an
extended period of time.
CAUTION
All panels must be in place when rigging.
Exhaust Dampers for Indoor Units
The exhaust dampers for indoor units (if ordered) are not
installed from the factory and must be be installed and
wired (if required) on site. Coiled 24V wire harness with
plug connector is provided on the unit for motorized
dampers when ordered. The dampers should be mounted
sufficiently far enough downstream from the exhaust fan
discharge to avoid causing deficient fan performance or
added pressure loss. A gradual transition in the duct from
discharge to damper size is recommended. Dampers are
for in-duct mounting; see Appendix I for damper dimensions and Field Fabricated Ductwork for fan outlet duct
considerations.
Field Fabricated Ductwork
On outdoor units with bottom vertical duct connections,
secure all ducts to the roofcurb and building structure
prior to unit installation. See Roofcurbs Supplied by Venmar CES. Do not secure ductwork to the unit.
On other duct connection locations, make connections to
the casing by applying caulking around the connection
and screwing flanged ducts directly to the casing and/or
flange with self-drilling sheet metal screws. It is important
to seal all duct connections to prevent air leakage and system performance problems. Ductwork must be supported
by the building structure. For unit and duct opening sizes
refer to submittal documents or see Appendix B.
IMPORTANT
Ensure that the fasteners used to make duct connections
do not interfere with fans or dampers in the unit.
airflows on units with direct driven fans (ERV500i/e and
ERV1000i) as shown in Appendix D.
Electric pre-heat in the outdoor air duct, if used as frost
prevention on indoor units, must be installed at a minimum distance from the unit of 24” [610 mm] as shown in
Appendix D.
Insulate and weatherproof all external ductwork, joints
and roof openings with counter-flashing and mastic in
accordance with applicable codes. Ductwork running
through roof decks must comply with local fire codes.
Both duct connections to outside must be insulated to
avoid condensation and heat loss. Ducts passing through
unconditioned spaces must be insulated and covered with
a vapor barrier. Flexible connectors should be installed
close to the unit in the duct leading to occupied spaces to
minimize noise transmission.
Transitions may be required to make connection with ductwork that is properly sized for minimum noise and pressure loss as shown in Appendix D.
Airflow rate balancing dampers are recommended for
both supply and exhaust ducts to allow for adjustment of
VCES-ERV-IOM-4A – ERV500–3000
16
Duct Design Considerations
The discharge ductwork immediately downstream from
the double width double inlet fan is critical for successful
applications. Poorly designed ductwork can degrade fan
performance and contribute to excessive pressure drop
and noise.
When designing ductwork in the field, it is important to
use a straight discharge duct of the same dimension as
the fan outlet connection to obtain maximum fan performance. The straight section of ductwork helps the airflow
to develop a uniform velocity profile as it exits the fan and
allows the velocity pressure to recover into static pressure.
See Figure 1.
Centrifugal fan
Cutoff
Discharge duct
Refer to Appendix N to determine the effect of undersized
straight sections of duct with or without duct elbows
within the 100% minimum effective duct length (reference: AMCA publication 201, Fans and Systems).
Example:
For an ERV1500e with a supply flow rate of 2,000 cfm,
with a bottom supply fan discharge connection, with rectangular connection of ‘a’ = 9.25” and ‘b’ = 10.25” the
length of straight duct is 17” before entering a 90 degree
elbow is reached in position C as shown in Figure N1:
•
•
•
•
100% effective duct length
2½ diameters at 2,500 FPM
•
Figure 1: Duct design
•
For 100% recovery of velocity pressure into static pressure,
the straight portion of the discharge duct must be at least
2.5 times the “Equivalent Duct Diameter” of the rectangular duct connection up to 2,500 fpm outlet velocity or
less. Add one duct diameter for each additional 1,000
fpm outlet velocity to the length of the straight portion of
discharge duct. The equivalent duct diameter is equal to
square root of (4ab⁄Pi) where ‘a’ and ‘b’ are the rectangular dimensions of the fan discharge opening.
The equivalent duct diameter is equal to square root
of (4*9.25*10.25⁄Pi) = 10.987”
The outlet velocity is equal to
2,000 cfm/(9.25*10.25/144) = 3,028 fpm
Therefore the minimum length of straight for 100%
effective recovery needed would be equal to
10.987*(2.5+(3,028−2,500)/1,000) = 34” rounded
up to the next whole inch
The effective straight duct was 17” long or
17/34 *100 = 50% effective
From Appendix I, the ERV500 and ERV1000 have
SWSI fans; all other models have DWDI fans. Using
Table N1, with elbow position C and 50% duct effective length, use curve ‘S’
From Figure N2, with an ‘S’ curve at 3,028 fpm and
1.0 multiplier for DWDI fans the added external pressure drop is approximately 0.47*1.00 = 0.47” w.c.
which must be added to the external pressure drop
for the unit
Hood Installation
Intake and exhaust hoods for these models are shipped
separately from the unit. To install hoods see Appendix
E. A quick connect for the damper motors is provided to
VCES-ERV-IOM-4A – ERV500–3000
connect to the main body of the unit. Make sure that all
screws are secured to maintain proper support and keep
seals water-tight.
17
Access Panel Handles
IMPORTANT
Securing door fasteners too tightly has negative effects
on the door gasket and should be avoided.
Handles for access panels are provided but must be installed on site. Handles and fasteners are secured inside or
on top (indoor unit) of the unit. Remove from packaging
and install according to Figure 2.
Access panel
Metal or
polyamide
handle
#10 x ¾ Screw
Figure 2: Access panel
Internal Packaging
Remove access panels and all packaging from the unit.
Note that there is packaging for wheel support during
shipping (ERV2000i/e only, see Figure 6). Removal of all
packaging is critical.
CAUTION
Remove all ERV wheel packaging prior to start-up.
Coil Piping Connections (ERV3000i/e Only)
Integrated heating and cooling coil options are only available on the ERV3000i/e models. Cooling coils are limited
to airflows up to 2,650 cfm to limit maximum coil velocity
to 505 fpm. All heating and cooling configurations are
factory mounted with cooling coil upstream, heating coil
directly downstream (when both required). Coil connections are extended outside on the side of the cabinet.
External supply and return piping design and all other
safety, freeze protection or control piping requirements for
system operation are the sole responsibility of the Installing Contractor and/or Design Engineer. Refer to ASHRAE
handbooks and local building codes for correct piping procedures and proper installations. Refer to the submittals
for coil performance design information.
Condensate Drain Trap (ERV3000i/e Only)
Cooling coil drain pan is provided with a 1¼” MPT drain
connection. A drain trap and condensate line of equal size
must be field provided on the drain connection to prevent
air or sewer gases from being pulled into the unit caused
by the negative (suction) pressure and forcing water out of
the pan into the unit.
A label with recommended standard trap height is provided on the unit as per Figure 3.
Condensate drain must be trapped as shown.
Refer to IOM for further instructions and maintenance.
Le drain de condensation doit être fabriqué et intallé tel que
le croquis ci-bas. Voir le manuel d’installation,
opération et maintenance pour instructions.
Removable plug
Bouchon amovible
Roofcurb top face
Costière face supérieure
Cleanout
Orifice de nettoyage
6.0” [152 mm] minimum
6,0 po [152 mm] minimum
6.627” [168 mm]
6,627 po [168 mm]
Unit baserail
Traverses
de base
Removable plug
Bouchon amovible
Cleanout
Orifice de
nettoyage
3.0” [76 mm] min.
3,0 po [76 mm] min.
Curb
Bordure
PN 500059005
Figure 3: Condensate drain trap label
VCES-ERV-IOM-4A – ERV500–3000
18
The trap height allows for the maximum suction pressure
after the cooling coil with intake damper, dirty pre and
final high efficiency filters, heat wheel, plus 1” w.c. per
ASHRAE guidelines for outdoor unit with intake hood or
indoor unit with up to 0.5” w.c. external static pressure
loss intake duct.
Slope the drain lines downward in direction of flow 1/8
inch per foot referring to local codes for proper drainage
requirements. Installing a plug for cleaning of the trap is
recommended. Prime the trap by filling with water before
start-up. Winterize the drain line before freezing on outdoor units.
Check and clear drains annually at start of cooling season.
Drainage problems can occur should drains be inactive and
dry out, or due to reduced water flow caused by buildup
of algae. Regular maintenance will prevent these problems
from occurring.
Systems Integration
Forced Air System
When the ERV is installed in conjunction with a forced
air system, the air handler and the network of ducts associated with it are used to distribute fresh air inside the
building. If this type of system is used, the main fan of the
air handler must operate continuously when the unit is on.
Fan interlock can be connected in the unit control box to
the integrated control board terminals J3-1 and J3-2 (for
low voltage Class II circuit only). The controller makes relay
contact between these terminals when the unit is operating, as shown in Figure 4.
2
1
1
J2
JU1G – Intermittent standy (IS)
JU1F – Extended defrost
COMM.
N/C
N/O
J1
J4
1 2 3
6
4
9
7
Separate Systems
Select locations for exhaust grilles and supply diffusers
to provide effective ventilation and avoid short circuiting
airflows through the space. Adjustable dampers should be
provided at every grille and diffuser to make balancing of
the system possible.
Backdraft Damper
48644 power
control board
3
Fresh air from the ERV should be introduced into the return duct of the air handler at a point no less than 6 feet
[1,829 mm] upstream of the air handler. The duct connection for return air to the ERV should be made on the
return air duct at least 2 feet [610 mm] upstream of the
fresh air duct connection.
A backdraft gravity damper is supplied with recirculation
defrost units to be installed in the exhaust air outlet duct
on indoor units. This damper is necessary to prevent air
from entering the building through the exhaust duct when
the unit is in recirculation defrost mode. See Appendix I
for backdraft damper dimensions.
JU1
+
+
+
+
+
+
+
+
+
+
+
+
+
+
ABCDEFG
F F I OC OL Y R G B
J3
Fan interlock
contacts
Figure 4: Fan interlock
VCES-ERV-IOM-4A – ERV500–3000
19
Electrical Connections
!
WARNING
When installed, the unit must be electrically grounded in
accordance with local codes or, in the absence of local
codes, with the National Electrical Code, ANSI/NFPA70,
and/or the Canadian Electrical Code CSA C22.1. Unit
cabinet must have an uninterrupted, unbroken electrical
ground to minimize the possibility of personal injury if an
electrical fault should occur. Failure to follow this warning could result in the Installer being liable for personal
injury of others.
Power Supply
Units are available in all voltages and phases. Please see
Appendix J for electrical data. Check nameplate for correct power supply requirements. These units do not have a
factory installed disconnect switch. An optional disconnect
switch is available if requested and is shipped separately
for field installation. If disconnect is field supplied, provide and install disconnect as per NEC/Canadian Electrical
Code. Use copper conductors only.
All field wiring must comply with NEC and local requirements. In Canada, electrical connections must be in accordance with CSA C22.1 Canadian Electrical Code Part One.
Field Connection
Location of required wire connections are shown in Appendix B. A wiring diagram is located on the control box
lid inside the unit. See Appendix F for location of components and control box. For indoor units a junction box or
disconnect switch must be field supplied where high voltage connections are made. For outdoor units a high voltage connection (see Figure 5) is located on the outside of
the unit with knockout. A field installed disconnect switch
must use a liquid-tight connector between the disconnect
switch and the outside panel of the unit eliminating any
water penetration into the control box.
Rooftop unit
(cutaway shown)
¾” locknut
(as seen from
inside the unit)
¾” x 1-3/8” liquid-tight connector
¾” locknut
Line disconnect switch
(cutaway shown)
Figure 5: High voltage field connection
A low voltage remote control wiring interface is provided
on the unit for starting, controlling sequence and monitoring. The Installer must provide wiring; for the controls that
VCES-ERV-IOM-4A – ERV500–3000
may be supplied optionally or by others to the interface
terminals. For indoor units the low voltage terminals are
located on the outside of the unit enclosure. See Appendix
B for location of low voltage terminals/connection. For
outdoor units the low voltage remote wiring can be field
run through the roofcurb, return air ductwork and return
air opening to the interface terminals located inside the
unit control box.
The controls available for the energy recovery ventilators,
their reference and type of connection are listed below.
For more information on the controls, wiring and terminal
connections see Appendix G. The wall control is 12 VDC;
other terminals are 24 VAC or dry contact control.
Note:
1. Check the Controls and/or the Control Schematic
sections of the specification, optional and accessory
items shipped loose with or inside the unit for a list
of optional controls or wiring connections required to
the unit.
2. For the unit to start both ventilation and fan speed
calls are required except as noted. For ventilation
call the remote wall control, occupied timer/sensor,
manual switch or BMS contacts can be used. For fan
speed call the remote fan control, CO2 ventilation
control, manual switch or BMS contacts can be used.
• Wall control connection
–– Four-wire LVT 24 gauge minimum (12 VDC)
• Occupied timer/sensor connection
–– Makes a dry contact to operate unit. Timer requires
24 VAC. Do not use timer with Xtra wall control.
Note: When the wheel rotation sensor option
is included, the timer dry contact must be connected to either low or high speed remote fan
control terminals to operate unit.
• Enthalpy control
–– 24 VAC
• Remote fan control
–– Requires single pole, double throw switch for
Low–Common–High
–– Makes dry contact for speed setting
• Dirty filter sensor
–– Makes dry contact
• Wheel rotation sensor used as low temperature control (wheel failure)
–– Makes dry contact
• Wheel rotation sensor
–– Makes dry contact
• CO2 ventilation control
–– Makes dry contact
• Unoccupied recirc contacts
–– 24 VAC
• Smoke detector
–– Makes dry contact
20
Start-up
Pre Start-up Procedure
Before requesting start-up, check that the installation is
complete and unit is ready. Complete the pre start-up
checklist below and in Appendix M for each unit as items
are checked. For torque values on set screws, belt tension,
belt alignment, etc., check under Maintenance.
1. Check the electrical disconnect is in the ‘Off’ position.
2. Open access doors and check the unit for shipped
loose parts, obstructive packaging, objects near or in
fans, dampers, enthalpy wheel, etc. Remove all red
tie down bolts on fan assemblies and heat wheel if
so equipped.
IMPORTANT
For ERV2000i/e only, remove the additional shipping brackets from the enthalpy wheel. Failure to do so could severely
damage the wheel surface and void the warranty.
Figure 6: ERV2000i/e shipping brackets
4. Check belt alignment and tension.
5. Check that the air filters are installed and clean.
Replace if necessary. If filters are equipped with optional differential pressure switch, check that desired
setpoint does not exceed factory setting of 0.8” w.c.
[200 Pa].
6. Check coils (if equipped) if fins have been damaged
in transit or construction and are clean. Straighten
fins with fin comb and clean coil if required.
7. Check damper and linkages for free movement.
8. Check that ductwork is connected and complete.
9. Check that condensate drain connection (if equipped)
has been trapped, installed correctly and filled.
10. Check that all shipped loose or field supplied components have been correctly installed and wired.
11. Check that all power supplies and control wiring
have been inspected and approved by the Local Authorities having jurisdiction.
12. Check all factory and field wiring connections for
tightness. Tighten if necessary.
13. Check that all fuses are properly installed in holders.
14. Check the voltage at the disconnect switch against
the nameplate and against phase-to-phase readings
on three-phase. If the voltage is not within 10% of
rated or 2% of phase-to-phase, have the condition
corrected before continuing start-up.
15. Check that all field piping, venting and wiring installation and connections for the heating and cooling
options (if equipped) have been completed and
tested.
16. Check and adjust thermostat setpoints.
3. Check that the fans and heat wheel are rotating
freely.
Start-up Procedure
To ensure proper operation of each unit, qualified personnel should perform the start-up and complete the checklist
below and the start-up form in Appendix M for permanent
record. A completed checklist will provide valuable information for personnel performing future maintenance.
All units are dynamically balanced prior to shipping. However, there are certain operating speeds at which the
natural frequency of the rotating member is attuned to
the natural frequency of the unit panels, which may cause
vibrations.
IMPORTANT
These vibrations can tend to reinforce each other in such
a way that excessive vibration can be encountered under
certain conditions. It is difficult to predetermine this condition because it is affected by the mounting arrangement
and the various modules used to make up the assembly
and the ductwork connections.
A completed copy must be sent back to the factory for
warranty validation and for factory assistance.
All units are factory run tested. Fans and heat wheel are
set up to run correct when power is connected. If any one
fan is running backwards, disconnect power and switch
two leads (on three-phase power) to ensure proper rotation and avoid damage.
VCES-ERV-IOM-4A – ERV500–3000
If the above check reveals no apparent discrepancies and
vibration is still present, the speed of the unit should be
21
lowered approximately 10% to determine if the natural
frequency is causing the vibration.
3. Check that all access panels or doors are closed.
4. Turn the unit disconnect switch to the ‘On’ position.
Under no condition should the unit(s) be allowed to continue to operate when excessive unit vibration is apparent.
Permanent damage may result which will not be covered
under warranty if the unit is allowed to continue in operation when excessive vibrations are evident.
On initial power up, the unit will perform a system check
and operate at high speed for five seconds.
1. Before proceeding complete the pre start-up checklist
2. For the unit to start when the disconnect switch is
turned on a ventilation and fan speed call is required.
a. Check for ventilation call from the remote wall
control connection, occupied timer/sensor connection or BMS, whichever is used. See Appendix G for which terminal connections should be
closed (contacts made) once power is connected.
Circle which device is used.
b. Check for either low speed or high speed (if
equipped) call from the remote fan control, CO2
ventilation control or BMS, whichever is used.
See Appendix G for which terminal connections
should be closed (contacts made) once power is
connected. Circle which device is used.
c. If ‘a’ and ‘b’ are not connected, start can be accomplished by using temporary external ‘dry contacts’ or a jumper wire closing timer contacts 3
and 4 plus low speed contacts 13 and 14 or high
speed contacts 14 and 15, Check if temporary
‘dry contacts’ or a jumper wires used.
!
WARNING
Only low or high speed contacts must be closed at any
one time, never both using dry contacts/jumper wires
otherwise permanent damage to the motor and wiring
will occur.
Remote controls, if installed and connected, operate in
conjunction with the dry contacts/jumper wires. When
controlling units with remote controls, use extreme caution around moving mechanical components such as
fans, belts and motors as they can lead to severe personal
injury.
VCES-ERV-IOM-4A – ERV500–3000
IMPORTANT
5. Check that dampers are operating properly.
6. Wait for fans to run and then shut off unit’s disconnect switch. Check that fans and enthalpy wheel are
rotating in the correct direction. To reverse fan rotation, interchange two wires on load side of threephase power supply.
7. Close all access doors and turn the unit’s disconnect
to the ‘On’ position.
8. Re-check the voltage at the disconnect switch
against the nameplate and against phase-to-phase
readings on three-phase with all fans operating. If
the voltage is not within 10% of rated or 2% of
phase-to-phase have the condition corrected before
continuing start-up.
9. Check amperage draw to each motor on each phase
against motor nameplate FLA. Do not allow the motor’s amp draw to exceed the motor Manufacturer’s
nameplate data. Excessive amp draw will cause premature failure of the motor and void the motor warranty. If significantly different, check ductwork static
and/or take corrective action.
10. Check the operation of the control options and accessories provided with the unit. See Frost Control,
Sequence of Operation and Appendix G for functional descriptions and further details.
11. Check the setpoints on thermostats and controls, adjust and record changes as required.
12. When unit has achieved steady state take measurements and complete the readings section of the
start-up form in Appendix M and send copy of the
start-up form to Venmar CES to validate warranty.
Maintain a copy of the report at the unit for future
reference.
22
Frost Control
Recirculation Defrost
VSD (Variable Speed Drive) Frost Prevention
Recirculation defrost is a temperature initiated timebased cycle which will de-energize the exhaust fan and
the wheel drive motor, close the outdoor air damper and
circulate return air through both sides of the wheel. If recirculation is in operation, it will run approximately 15%
of the time, only when the outdoor air temperature falls
below 5°F [−15°C].
This variable speed frost prevention option is an exhaust
air temperature controlled function that allows for continuous ventilation by reducing the enthalpy wheel rotational
speed. The rotational speed and therefore effectiveness of
the enthalpy wheel, is modulated to maintain an exhaust
air temperature of 33°F [1°C]. This modulation maintains
the wheel operating temperature at conditions that prevent frost formation. Special consideration must be given
to applications where supply air is being heated, as the
heating capacity maximum condition will be during the
frost prevention cycle.
Exhaust Only Defrost
Exhaust only defrost is a temperature initiated time-based
cycle which will de-energize the supply fan, close the
outdoor air damper and exhaust return air through the exhaust side of the wheel as it continues to rotate. If exhaust
only is in operation, it will run approximately 15% of the
time, only when the outdoor air temperature falls below
5°F [−15°C].
Pre-heat Frost Prevention
Pre-heat frost prevention is an outdoor air temperature
controlled function that allows for continuous ventilation
by monitoring the outdoor air temperature and ensuring
a minimum entering air temperature (into the enthalpy
wheel) of 5°F [−15°C]. There are fixed kW capacity options
available based upon the unit model. For pre-heat capacity requirements, please use applicable ASHRAE formulas.
Pre-heat frost prevention can have two-stage, four-stage
or SCR control.
IMPORTANT
VSD frost control may cause supply air temperatures to
be below freezing. Adequate freeze protection, such
as glycol or low limit temperature protection for downstream coils or reheat to protect building systems, must
be field provided.
Non-defrost
No frost control is required in areas where the winter outdoor air condition stays above 5°F [−15°C] and the return
air humidity level is below 30%.
Sequence of Operation
IMPORTANT
•
On initial power up, the unit will perform a system check
and operate at high speed for five seconds.
Unit Checkpoints
•
•
•
Power connected, no ventilation call – Both fans are
off, supply damper (if equipped) closes off outdoor air.
Power connected, low speed call (optional) – Both
fans on low speed, supply damper (optional) opens
outdoor air, recirculation defrost damper (optional)
remains closed. Exhaust damper (optional) opens. If
unit is single-speed, it will come on that speed on a
call for low or high.
Power connected, high speed call – Both fans on
high speed, supply damper (optional) opens outdoor
air. Recirculation defrost damper (optional) remains
closed. Exhaust damper (optional) opens. If unit is
single-speed, it will come on the speed on a call for
low or high.
VCES-ERV-IOM-4A – ERV500–3000
•
•
•
Power connected, occupied timer/sensor connection
open (factory installed jumper removed/unoccupied
mode) – Both fans are off, recirculation defrost
damper (optional) remains closed. Supply and exhaust dampers (optional) are closed.
Power connected, enthalpy control contacts closed,
unit ventilating – Wheel stops rotating, fans stay on
set speed, recirculation defrost damper (optional)
remains closed. Supply and exhaust dampers remain
open.
Power connected, enthalpy control contacts closed,
unit not in ventilation mode – Wheel does not rotate,
fans come on low speed (optional); if unit is singlespeed, it will come on that speed on a call for low or
high. Recirculation defrost damper (optional) remains
closed, supply and exhaust dampers open.
Power connected, recirculation defrost (optional –
factory installed) – Recirc contacts are closed, exhaust
fan is de-energized, supply fan runs and recirculation
damper opens.
23
Airflow Balancing
For proper performance the unit must operate at the
specified supply and exhaust flow rates. Unit fan speed(s)
are theoretically set at the factory based on the ductwork
static pressures and flow rates specified with the order and
in the performance data.
Wheel Pressure Drop vs. Flow Formula and Tables located
in Appendix K for the wheel diameter and thickness or efficiency rating. Heat recovery performance is tested in accordance to AHRI Standard 1060 and is accurate to within
+/−5% if there is no dirt buildup in the heat recovery wheel.
If conditions change or verification is required, airflow
measurements should be taken using AMCA suggested
methods. This would normally be a velocity traverse measurement or flow measuring station (FMS) installed in the
ducts as shown in Appendix D.
Setting Flow Rates
It is important to locate the FMS in the “warm side” ductwork to minimize the effect of differences in air density,
especially when balancing during extremely cold outside
conditions. Air density variations can affect the FMS by
more than 15%. The FMS should be located downstream
from straight sections of duct and not immediately after
fans or obstructions that will cause turbulent flow. Flow
control dampers should be installed downstream from the
FMS so flow through the FMS is not disturbed. Dampers
can then be adjusted to equalize flow rated in the ducts.
Where space is limited in the outdoor air and exhaust air
ductwork, pressure drop readings can be taken across the
enthalpy wheel and read or calculated from the Enthalpy
Units supplied with belt driven double width double inlet
fans have an adjustable motor sheave factory set at the
midpoint of travel at rpm for the flow rate and external
static specified. With optional VFD driven motors this factory setting is at 60 Hz.
For outdoor and exhaust, airflow rate should be balanced
with motors operating at high speed and at 60 Hz by
adjusting the motor sheave pitch diameter. The VFD can
be used for fine tuning depending on sequence or as required.
Units supplied with direct driven single width single inlet
fans operate at the motor rpm. Flow rate must be balanced on jobsite by adjusting field supplied and installed
balancing dampers as shown in Appendix D and measuring airflow as described in Airflow Balancing.
Maintenance
!
WARNING
Disconnect the main power switch to the unit before performing service and maintenance procedures.
See Appendix F for component locations, Appendix H for
troubleshooting information and Appendix L for a recommended list of routine maintenance items and time intervals. A more detailed description of maintenance items
follows.
Air Filters
The standard medium efficiency filters and optional high
efficiency filters (ERV3000e only) are disposable and
should be replaced every three months. More frequent
replacement may be required under extremely dirty operating conditions.
To remove the exhaust filters in the ERV1000i and
ERV2000i/e, remove the screw holding the filter access
door and slide the exhaust filter access door down to the
bottom of the unit. The filters are set in frames and can
be removed by pulling on the filter tabs and sliding them
forward and out of the unit. First, the right filter must be
removed, then the left filter must slide over to where the
right filter was, then pull it forward and out of the unit
(see Figure 7).
VCES-ERV-IOM-4A – ERV500–3000
Figure 7: Exhaust filter access – ERV1000i and ERV2000i/e
24
!
WARNING
Disconnect the main power switch to the unit before performing service and maintenance procedures.
To replace the ERV1500i/e and ERV3000i/e filters, remove
the enthalpy wheel access door. Grasp the filter frame at
the left and right edges and pull straight out (see Figure 8
& Figure 9). The filter frame will slide completely out of the
unit. Pull the filters up and out the top of the frame. Place
the new filters into the frame and slide the frame back
into the unit. Replace the enthalpy wheel access door. For
filter specifications, see Appendix I.
Figure 9: Filter access – ERV1500i/e and ERV3000i/e
Figure 8: Filter access – ERV1500i/e and ERV3000i/e
Interior of Unit
Remove the filters from the unit. Wipe the interior foil
faced insulation or optional galvanized steel liner surfaces
and enthalpy wheel cassette panels with a soft cloth and
mild cleaning solution.
VCES-ERV-IOM-4A – ERV500–3000
25
Fans
!
WARNING
Disconnect the main power switch to the unit before performing service and maintenance procedures.
ERV units may be fitted with direct driven fans and motors (ERV500i/e and ERV1000i) or belt driven fans. Belt
driven fans are provided with either spider bracket bearings which come pre-lubricated from the Manufacturer
and require no re-lubrication, or with pillow block bearings which are pre-lubricated. Pillow block bearings
should be lubricated at six to twelve month intervals. The
recommended lubricant is Shell Alvania #2 or S3. A small
amount of grease should be added slowly while the shaft
is rotated. Note: Over greasing may cause damage to the
bearing. Avoid rupturing the bearing seal.
Fan wheels and fan housings should be checked for dirt
buildup. If they are dirty, it will be necessary to remove
the blower assembly to clean the dust out through the fan
discharge.
Figure 11: Remove control box cover
To remove the exhaust blower, unscrew the two wing
nuts used to fasten the blower assembly to the middle
shelf in the unit. Rotate the blower assembly and slide it
out of the unit.
Direct Driven Fan and Motor Removal
(ERV500 shown)
Exhaust
After disconnecting the power from the unit, disconnect all
the plug-in connectors on the left side of the control box.
Figure 12: Remove exhaust blower
Supply
After disconnecting the power from the unit, disconnect
the three-wire connector between the supply motor and
control box.
Figure 10: Disconnect plug-in connectors
Remove the four Phillips head screws holding the control
box cover. Using a ¼” nut driver, remove the four hex
head screws holding the control box to the unit. Remove
the control box to gain access to the exhaust blower assembly.
Figure 13: Disconnect three-wire connector
VCES-ERV-IOM-4A – ERV500–3000
26
!
WARNING
Disconnect the main power switch to the unit before performing service and maintenance procedures.
result in noise from excessive vibration, premature bearing
failure and short belt life. Tight belts may overload a motor
that would otherwise be adequate.
To remove the supply blower, unscrew the four wing nuts
used to fasten the blower assembly to the middle shelf of
the unit. Slide the blower assembly out of the unit.
Figure 14: Remove supply blower
Figure 16: Belt tension adjustment
Belt Driven Fan and Motor Removal
(ERV2000 shown)
To adjust the belt tension, loosen the two pivot bolts (#1,
Figure 17). Loosen the two adjustment bolts (#2, Figure
17). Rotate the motor and base plate to achieve the maximum belt deflection as described above. Tighten the drive
belt side adjustment bolt. Adjust the motor plate so that
the sheave and pulley faces are parallel and the belt is
aligned. Tighten the remaining adjustment bolt and the
two pivot bolts.
After disconnecting the four-wire service connector between the motor and the control box (#1, Figure 15),
loosen the two front bolts (#2, Figure 15). Remove the
two back bolts (#3, Figure 15). Slide the fan assembly
away from the discharge opening and lift out of the unit.
Verify that the sheave and pulley faces are still parallel.
The fan rpm can be adjusted to achieve the design airflow
by setting the adjustable sheave on the motor shaft. The
pulley set screw torque setting is 110 in-lbs to 130 in-lbs.
Figure 15: Supply fan (ERV2000 shown)
Belt Tension Adjustment
Excessive belt tension is the number one cause of fan
bearing failure. Proper belt tension and pulley alignment
are essential for trouble free operation. A simple rule of
thumb for checking belt tension is illustrated in Figure 16.
When the belt is grasped as shown in, a total deflection of
approximately 1” [25 mm] should be attained. Insufficient
deflection indicates that the belt is too tight, which may
VCES-ERV-IOM-4A – ERV500–3000
Figure 17: Motor (ERV2000 shown)
27
Enthalpy Wheel
!
WARNING
Face Seal Replacement and Adjustment
Disconnect the main power switch to the unit before performing service and maintenance procedures.
General
No cleaning of the enthalpy wheel is required; it is selfcleaning due to the opposing airflows. If the enthalpy
wheel needs to be cleaned, use low pressure air or vacuum. Wash the cassette panels with a soft cloth and mild
cleaning solution. Visually inspect the cassette brush seals
(see Figure 18), perimeter seal and drive belt for proper
operation.
Rotor
Complete the following instructions to replace the brush
seal on both sides of the cassette. On the belt side of the
cassette, remove the two Phillips screws holding the air
filter guide to the cassette assembly. Remove the additional Phillips screw holding the brush seal to the cassette
assembly. On the motor side of the cassette, remove the
three Phillips screws holding the brush seal to the cassette
assembly.
Brush.seal
Figure 18: Cassette brush seals
ERV500 Enthalpy Wheel
Cassette Removal
After disconnecting the power from the unit, disconnect
the two three-wire connectors located on the metal frame
of the cassette assembly. Both connectors are positioned
at the front of the cassette assembly, one connector located at the top right position and the other at the bottom
left position on the cassette frame. Disconnect the threewire connector from the control box being used to supply
power to the cassette motor.
IMPORTANT
Use extreme care when removing or installing the cassette assembly. Damage to the cassette media may result
in poor unit efficiency and may void the warranty.
Figure 20: Remove screws holding brush seal to cassette
assembly
Install the new brush seals so that the bristles come in
contact with the cassette. Reverse the procedures above to
re-install the brush seals and the air filter guide.
Enthalpy Wheel Drive Belt Replacement and
Tensioning Adjustment
To replace the cassette drive belt, the brush seal located
on the drive belt side of the cassette must be removed.
Complete the steps in the previous section for the removal
of the brush seal prior to completing the following procedures. The cassette beam assembly must be removed
to gain access to the cassette drive belt. To remove the
cassette beam assembly, remove the three Phillips screws
used to fasten the cassette beam cover.
Figure 21: Remove cassette beam assembly
Figure 19: Remove cassette assembly
VCES-ERV-IOM-4A – ERV500–3000
28
!
WARNING
Disconnect the main power switch to the unit before performing service and maintenance procedures.
Using a 1/8” Allen key, loosen the two set screws used to
tighten the cassette bearing to the cassette shaft. The set
screws are located in-line with the cassette shaft, between
the cassette and the cassette beam. After loosening one
set screw, it will be necessary to rotate the wheel a half
turn to access the second set screw.
Figure 24: Remove belt from cassette
Install the new belt onto the cassette and adjustable
sheave (pulley). Re-install the outer half of the adjustable
sheave by rotating it clockwise onto the threaded shaft.
This process will be used to tighten the belt around the
perimeter of the cassette. Do not tighten the belt onto the
cassette until the beam assembly has been reinstalled.
Figure 22: Loosen set screws
Using a 7/16” nut driver, remove the four ¼” bolts holding the cassette beam to the cassette frame. The cassette
beam can now be removed and placed aside to re-install
later.
Reverse the above procedures to re-assemble the cassette
assembly. It will also be necessary to complete the steps in
the previous sections that were used to install the cassette
brush seal and the cassette.
ERV1000 to ERV3000 Enthalpy Wheel
Cassette Removal
After disconnecting the power from the unit, open the
service door for the cassette access. Disconnect the service connector between the motor and the control box.
Remove the exhaust filters and slide the cassette out of
the unit. Take care not to damage the rotor face or any of
the cassette seals. Proper support must be provided so the
cassette is not dropped.
Perimeter Seal Replacement
CAUTION
When handling the enthalpy wheel, ensure not to damage the face of the wheel.
Figure 23: Remove cassette beam bolts
Remove the outer half of the adjustable sheave (pulley).
Using a 5/32” Allen key, loosen the set screw located
on the outer half of the adjustable sheave. Remove the
outer half of the adjustable sheave by turning it counterclockwise. This sheave piece is threaded and therefore it
will take a few rotations to completely remove it. Once
removed, slide the belt off the cassette.
VCES-ERV-IOM-4A – ERV500–3000
To replace the perimeter seal, the enthalpy wheel must
be removed from the frame. Disconnect the service connector to the drive motor of the enthalpy wheel cassette.
Remove the cassette from the unit and stand the assembly
on the floor or roof. Remove the dust cap (#1, Figure 25)
from the bearing on the drive motor side of the cassette.
Remove the bolt (#2, Figure 25) from the end of the wheel
shaft with a socket or wrench on the drive motor side.
Repeat this procedure for the other side of the cassette
assembly. Remove the four bolts (#3, Figure 25) with a
socket or wrench. Remove the beam and bearing assembly from the end of the wheel shaft. Loosen the four Nyloc
nuts (#1, Figure 26) holding the drive motor using a socket
29
!
WARNING
Disconnect the main power switch to the unit before performing service and maintenance procedures.
or wrench. Rotate the drive motor in the slots to loosen
the drive belt and remove the belt. Lift the enthalpy wheel
out of the frame with assistance and set aside. Remove
the perimeter seal halves (#4, Figure 25) from the cassette
frame assembly. Install the two new perimeter seal halves
by pressing them into place, cutting to the correct length
as necessary. The perimeter seals are non-adjustable.
Complete the installation by reversing the above procedure.
roof. Remove the screws holding the face seals (#5, Figure
25). Replace the two seals (supply and exhaust sides), cutting to length as required. Adjust the seals in the slots so
that the brush just touches the face of the wheel. Complete the installation by reversing the above procedure.
Enthalpy Wheel Drive Belt Replacement and
Tensioning Adjustment
The enthalpy wheel drive belt can be tightened by only
sliding the cassette assembly part way out of the unit.
Disconnect the service connector to the drive motor of the
enthalpy wheel cassette. Slide the cassette assembly out
of the unit enough to access the drive motor. Loosen the
four Nyloc nuts (#1, Figure 26) holding the drive motor
using a socket or wrench. Rotate the drive motor to loosen
the belt and replace the belt if necessary. Rotate the drive
motor in the slots to tighten the drive belt. Secure the
motor in it’s new location by tightening the four Nyloc
nuts. (#1, Figure 26). Complete the installation by reversing the above procedure.
Figure 25: Cassette and drive
Face Seal Replacement and Adjustment
CAUTION
When handling the enthalpy wheel, ensure not to damage the face of the wheel.
To replace the face seals, the cassette assembly must be
removed from the unit. Disconnect the service connector
to the drive motor of the enthalpy wheel cassette. Remove
the cassette from the unit and stand up on the floor or
Figure 26: Cassette and drive
Testing and Replacement of the Damper Actuator
After disconnecting the power from the unit, determine
if the actuator is defective. Disconnect the 24V power
source. Connect the actuator directly to a 24V power
source with an appropriate cable. If the damper operates
correctly, the problem is either in the wiring connections
VCES-ERV-IOM-4A – ERV500–3000
or main circuit board. If the actuator does not work,
it must be replaced. Loosen the nuts on the jack shaft
clamp, remove the actuator. Tighten the clamp on the
damper jack shaft. Test for proper operation.
30
Coils
!
WARNING
Disconnect the main power switch to the unit before performing service and maintenance procedures.
Dirt on the surface of the coil reduces its ability to transfer
heat which lowers the efficiency of the unit, resulting in
poor air quality and expensive operating costs. Because of
the condensate on the coil, the dirt often becomes wet
and contributes to the growth of microbial organisms.
Negligence in maintenance may result in serious health
related indoor air quality problems.
The coil should be kept clean for maximum performance.
To achieve maximum efficiency, clean the coil often during
periods of high demand or when dirty conditions prevail.
Venmar CES recommends cleaning the coil a minimum of
once per year to prevent dirt buildup in the coil fins where
it may not be visible.
Coil fins can be cleaned by using steam with detergent,
hot water spray or a commercial chemical coil cleaner.
After cleaning the coil, be sure to rinse thoroughly.
2. Open panels or doors to gain access to both sides of
the coil section.
3. Remove soft debris from both sides of the coil with a
soft brush.
4. Using a steam cleaning machine, clean the leaving
airside of the coil first (going downward) then clean
the entering airside. Use a block-off to prevent the
steam from penetrating a dry section of the unit.
5. Allow the unit to dry thoroughly before restoring
power.
6. Damaged coil fins (excluding brazed aluminum)
should be straightened by using a fin comb.
7. Close all panels and doors once the coil is dry.
8. Restore electrical power to the unit.
CAUTION
Do not use acidic chemical coil cleaners. Do not use alkaline chemical coil cleaners with a pH value greater than
8.5 or lower than 6 (after mixing) without using an aluminum corrosion inhibitor in the cleaning solution. Using
these types of cleaners may result in unit damage.
Cleaning Procedure
1. Shut down the unit by closing the main disconnect at
the power inlet.
System Operation Check
Verification of all control modes should be checked to ensure proper operation. Refer to Start-up section.
VCES-ERV-IOM-4A – ERV500–3000
31
Appendix A: Roofcurb Detail
SECTION A-A
Unit
3/8” [10] gasket
(supplied with curb)
A
Wood nailer
Overhang:
3” [76]
Unit
baserail
A
Supply
air
Return air
Counter flashing
(field supplied)
Roofing felt
(field supplied)
Cant strip
(field supplied)
Rigid insulation
(optional)
2.375”
[60]
Roofing material
(field supplied)
17.500”
[445]
14.500”
[368]
5.500”
[140]
64.000”
[1,626]
15.250”
[387]
1.500” typ.
[38]
61.000”
[1,549]
15.000”
[381]
1.500” typ.
[38]
Rigid insulation (styro)
Wood nailer
Note: Dimensions in [ ] are millimeters.
Figure A1: ERV500e roofcurb detail
VCES-ERV-IOM-4A – ERV500–3000
32
ROOFCURB DETAIL END VIEW
ROOFCURB DETAIL FRONT VIEW
See Detail B
Supply air
Return air
Supply air
Return air
Detail B
Unit
3/8” [10] gasket
(supplied with curb)
Wood nailer
Overhang:
6.037” [153]
Unit
baserail
Counter flashing
(field supplied)
Roofing felt
(field supplied)
Cant strip
(field supplied)
Rigid insulation
(optional)
Roofing material
(field supplied)
49.000”
[1,245]
32.000”
[813]
45.000”
[1,143]
Return air
opening
18.000”
[457]
Supply air
opening
2.000” typ.
[51]
16.000”
[406]
18.125”
[460]
Wood nailer
9.5”
[241]
3” [76]
flange
36.000”
[914]
4.750”
[120]
Note: Dimensions in [ ] are millimeters.
Figure A2: ERV1500e roofcurb detail
VCES-ERV-IOM-4A – ERV500–3000
33
ROOFCURB DETAIL END VIEW
ROOFCURB DETAIL FRONT VIEW
See Detail B
Return air
Supply air
Supply air
Return air
Detail B
Unit
3/8” [10] gasket
(supplied with curb)
Wood nailer
Overhang:
6.151” [156]
Unit
baserail
Counter flashing
(field supplied)
Roofing felt
(field supplied)
Cant strip
(field supplied)
Rigid insulation
(optional)
Roofing material
(field supplied)
42.000”
[1,067]
15.622”
[397]
81.000”
[2,057]
32.551”
[827]
77.000”
[1,956]
37.875”
[962]
Return air
opening
2.000” typ.
[51]
Supply air
opening
18.000”
[457]
Wood nailer
3” [76]
flange
12.018”
[305]
14.537”
[369]
Note: Dimensions in [ ] are millimeters.
Figure A3: ERV2000e roofcurb detail
VCES-ERV-IOM-4A – ERV500–3000
34
ROOFCURB DETAIL END VIEW
ROOFCURB DETAIL FRONT VIEW
See Detail B
Supply air
Return air
Supply air
Return air
Detail B
Unit
3/8” [10] gasket
(supplied with curb)
Wood Nailer
Overhang:
6.025” [153]
Unit
baserail
Counter flashing
(field supplied)
Roofing felt
(field supplied)
Cant strip
(field supplied)
Rigid insulation
(optional)
Roofing material
(field supplied)
77.137”
[1,959]
28.000”
[711]
81.137”
[2,061]
16.000”
[406]
19.507”
[495]
0.105”
[3]
11.750”
[298]
13.270”
[337]
41.507”
[1,054]
37.507”
[953]
14.000”
[356]
Note: Dimensions in [ ] are millimeters.
Figure A4: ERV3000e roofcurb detail
VCES-ERV-IOM-4A – ERV500–3000
35
VCES-ERV-IOM-4A – ERV500–3000
SA
24.000”
[610]
RA
Left 16.000”
[406]
C
A
54.000”
[1,372]
52.000”
[1,321]
TOP VIEW
Front
BOTTOM VIEW
8.000”
[203]
14.000”
[356]
FRONT VIEW
58.000”
[1,473]
Supply fan, control box, filter,
cassette access panel
27.750”
[705]
Back
56.000”
[1,422]
OA
EA
2.000”
[51]
Recirculation defrost
port (optional)
D
9.375”
[238]
23.000” Right
[584]
B
Hanging mount hole Ø 0.625” [16]
Note: If the unit is to be hung,
materials required to hang the unit
will be supplied by others.
2.750”
[70]
4.500”
[114]
5.250” [133]
4.000”
[102]
EA-E
RIGHT VIEW
14.000”
[356]
OA-E
5.750”
[146]
22.000”
[559]
LEFT VIEW
5.750”
[146]
RA-E
23.000”
[584]
14.000”
[356]
Corner Weights
LBS
53.0
30.5
43.0
63.5
190.0
SA-E
PTS
A
B
C
D
TOTAL
1.500”
[38]
22.000”
[559]
2.000”
[51]
8.000”
[203]
5.250” [133]
5.000” [127]
4.000”
[102]
Low voltage connection
(leave 16” [406]
in front for access)
Power line input
8.000”
[203]
Kg
24.0
13.7
19.5
28.8
86.0
Requires a minimum of 24.000” [610] clearance to open door and
remove internal components.
Notes:
Dimensions in [ ] are millimeters.
Center of gravity
Direction of airflow
Appendix B: Dimensional Drawings
Figure B1: ERV500i unit dimensional drawing
36
Figure B2: ERV500e unit dimensional drawing
VCES-ERV-IOM-4A – ERV500–3000
37
Left
4.481”
[114]
27.000”
[686]
15.500”
[394]
12.380”
[314]
EA
9.500”
13.500” [241]
[343]
A
24.000”
[610]
Exhaust air
hood
3.810”
[97]
14.393”
[366]
Front
Back
RA
RA-S
SA
16.000”
[406]
OA-S
23.672”
[601]
22.000”
[559]
BACK VIEW
6.500”
[165]
FRONT VIEW
52.000”
[1,321]
68.000”
[1,727]
TOP VIEW
16.000”
[406]
Outdoor
air hood
OA
1.121”
[28]
1.103”
[28]
A
12.567”
[319]
12.617”
[320]
6.507”
[165]
6.823”
[173]
35.130”
[892]
23.000”
Right
[584]
5.623”
[143]
B
D
C
4.983”
[127]
14.000”
[356]
15.000”
[381]
5.310”
[135]
RA-B
SA-E
12.130”
[308]
2.705”
[69]
6.047”
[154]
5.700”
[145]
5.150”
[131]
SA-B
27.050”
[687]
0.951”
[24]
Connection Sizes
7/8”
1-1/8”
7/8”
1-1/8”
RIGHT VIEW
15.000”
[381]
17.937”
[456]
5.750”
[146]
5.500”
[140]
Field power supply knockout
Field power supply knockout
Low voltage knockout
Low voltage knockout
BOTTOM SECTION VIEW AA
10.257”
[261]
7.100”
[180]
19.980”
[508]
A
6.100”
[155]
6.776”
[172]
LEFT VIEW
24.000”
[610]
EA-E
23.000”
[584]
A
B
C
D
Connection Table
Requires a minimum of 24.000” [610] clearance to remove
internal components.
Notes:
Dimensions in [ ] are millimeters.
Direction of airflow
Figure B3: ERV1000i unit dimensional drawing
VCES-ERV-IOM-4A – ERV500–3000
38
Left
SA
EA
C
42.000”
[1,067]
RIGHT VIEW
FRONT VIEW
Cassette, filter
access panel
Supply fan
control box
access panel
36.500”
[927]
42.500”
[1,080]
TOP VIEW
Front
71.000”
[1,803]
65.000”
[1,651]
68.500”
[1,740]
Back
22.500”
[572]
Energy recovery
module
A
Exhaust fan
access panel
B
D
37.500”
[953]
40.000”
[1,016]
42.500”
[1,080]
20.000”
[508]
Right
7.250”
[184]
22.000”
[559]12.883”
[327]
2.251”
[57]
1.750”
[44]
12.000”
[305]
SA-E
18.750”
[476]
20.000”
[508]
RA-E
8.000”
[203]
1.117”
[28]
RIGHT VIEW
8.000”
[203]
OA-E
20.000”
[508]
LEFT VIEW
2.625”
[67]
1.750”
[44]
7.250”
[184]
8.250”
[210]
Low voltage connection
(leave 16” [406] in
front for access)
12.000”
[305]
0.750”
[19]
Corner Weights
LBS
Kg
120.95
54.87
114.35
51.87
136.05
61.71
128.65
58.35
500.00
226.80
8.000”
[203]
PTS
A
B
C
D
TOTAL
A minimum of 42.000” [1,067] clearance from any
obstruction is required for removal of energy recovery
module, fans and filters.
Notes:
Dimensions in [ ] are millimeters.
Center of gravity
Direction of airflow
8.000”
[203]
EA-E
Junction box
4.750” x 4.750”
[121 x 121]
Power line input
Hanging mount hole Ø 0.625” [16]
Note: If the unit is to be hung, materials
required to hang the unit will be supplied by others.
Optional externally mounted
supply damper for all
Frost Control options,
excluding D – Recirc Defrost
2.750”
[70]
OA
RA
Filter access panel
Figure B4: ERV1500i unit dimensional drawing
VCES-ERV-IOM-4A – ERV500–3000
39
Left
C
21.500”
[546]
9.440”
[240]
3.425”
[87]
A
7.450”
[189]
50.094”
[1,272]
Front
FRONT VIEW
55.754”
[1,416]
Cassette, filter,
supply blower
access panel
53.347”
[1,355]
TOP VIEW
SA-T
10.500”
[267]
RA-T
Back
13.500”
10.500”
[343]
[267]
26.000”
[660]
EA-T
9.193”
[234]
EA-S
BACK VIEW
Exhaust filter
and control box
access panel
D
2.319”
[59]
8.915”
[226]
9.440”
[240]
16.000”
[406]
Right
8.631”
[219]
3.775”
B
[96]
Control box
8.842”
[225]
14.226”
[361]
10.250”
[260]
8.068”
[205]
14.187”
[360]
10.250”
[260]
LEFT VIEW
44.290”
[1,125]
EA-E
43.190”
[1,097]
14.000”
Exhaust
[356]
blower
access
panel
OA-E
9.190”
[233]
BOTTOM VIEW
3.165”
[80]
26.669”
[677]
15.500”
[394]
16.000”
[406]
RA-B
SA-B
10.250”
[260]
5.306”
[135]
8.502”
[216]
12.000”
[305]
9.25”
[235]
8.993”
[288]
7.028”
[179]
Corner Weights
PTS
LBS
Kg
A
143.0
64.9
B
149.0
67.6
C
124.0
56.2
D
129.0
58.5
TOTAL
545.0
247.2
RA-E
12.000”
[305]
16.797”
[427]
RIGHT VIEW
SA-E
9.190”
[233]
9.029”
[229]
13.666”
[347]
10.250”
[260]
43.556”
[1,106]
Power
line input
8.103”
[206]
10.763”
[273]
18.000”
[457]
A minimum of 42.000” [1,067] clearance from any obstruction is required for removal of
energy recovery module, fans and filters.
On vertical discharge units, ductwork is to be attached to accessory roofcurb only.
On horizontal discharge units, field supplied flanges are to be attached to horizontal
discharge openings and ductwork is to be attached to the flanges.
Notes:
Dimensions in [ ] are millimeters.
Center of gravity
Optional
Figure B5: ERV1500e unit dimensional drawing
VCES-ERV-IOM-4A – ERV500–3000
40
7.594”
[193]
39.875”
[1,013]
2.070”
[53]
16.234”
[412]
Left
A
23.684”
[602]
C
Supply air
hood
A
2.982”
[76]
50.094”
[1,272]
Front
Back
FRONT VIEW
55.754”
[1,416]
Cassette, filter,
supply blower
access panel
TOP VIEW
26.000”
[660]
Exhaust
air
hood
17.572”
[446]
BACK VIEW
Exhaust filter
and control box
access panel
53.453”
[1,358]
A
D
Right
Control box
21.500”
[546]
B
11.222”
[285]
16.090”
[409]
20.575”
[523]
7.028”
[179]
8.993” [288]
9.25” [235]
12.000”
[305]
8.502” [216]
5.306”
[135]
LEFT VIEW
44.290”
[1,125]
Exhaust
blower
access
panel
43.190”
[1,097]
BOTTOM SECTIONAL VIEW AA
10.250”
[260]
SA-B
RA-B
16.000”
[406]
Corner Weights
PTS
LBS
Kg
A
151.0
68.5
B
133.0
60.3
C
155.0
70.3
D
136.0
61.7
TOTAL
575.0
260.8
13.666”
[347]
10.250”
[260]
43.556”
[1,106]
SA-E
9.190”
[233]
RA-E
12.000”
[305]
16.797”
[427]
RIGHT VIEW
9.029”
[229]
Power
line input
8.103”
[206]
10.763”
[273]
18.000”
[457]
A minimum of 42.000” [1,067] clearance from any obstruction is required for removal of
energy recovery module, fans and filters.
On vertical discharge units, ductwork is to be attached to accessory roofcurb only.
On horizontal discharge units, field supplied flanges are to be attached to horizontal
discharge openings and ductwork is to be attached to the flanges.
Notes:
Dimensions in [ ] are millimeters.
Center of gravity
Optional
Figure B6: ERV2000i unit dimensional drawing
VCES-ERV-IOM-4A – ERV500–3000
41
SA
48.000”
[1,219]
RIGHT VIEW
FRONT VIEW
Cassette, filter
access panel
Supply fan
control box
access panel
44.625”
[1,133]
D
B
Filter
access panel
48.500”
[1232]
TOP VIEW
Front
85.000”
[2,159]
88.500”
[2,248]
91.000”
[2,311]
Back
36.500”
[927]
Energy recovery
module
C
Hanging mount hole
Ø 0.625” [16]
Note: If the unit is to be
hung, materials required to
hang the unit will be
supplied by others.
Left
EA
A
Exhaust fan
access panel
44.375”
[1,127]
46.000”
[1,168]
48.500”
23.000”
[1,232]
[584]
Right
2.750”
[70]
Optional externally
mounted supply damper
for all Frost Control options
excluding ‘D – Recirc Defrost’
OA
RA
12.000”
[305]
2.845”
[72]
12.750”
[324]
14.000”
[356]
10.000”
[254]
14.000” SA-E
[356]
26.000”
[660]
RA-E
4.000” 2.000”
[102] [51]
10.750”
[273]
Power line input
3.500”
[89]
1.750”
[44]
12.000”
[305]
30.000”
[762]
7.625” Low voltage connection
[194] (leave 16.000” [406]
in front for access)
5.250”[133]
1.000”
[25]
RIGHT VIEW
OA-E
26.000”
[660]
LEFT VIEW
10.000”
[254]
7.625”
[194]
EA-E
5.380”
[137]
13.251”
[337]
Corner Weights
PTS
LBS
Kg
A
173.73
78.80
B
158.22
71.76
C
192.62
87.37
D
175.43
79.57
TOTAL
700.00 317.52
A minimum of 48.000” [1,219] clearance from any obstruction is
required for removal of energy recovery module, fans and filters.
Notes:
Dimensions in [ ] are millimeters.
Center of gravity
Direction of airflow
Figure B7: ERV2000e unit dimensional drawing
VCES-ERV-IOM-4A – ERV500–3000
42
Left
EA
A
5.374”
[136]
3.662”
[93]
9.500”
[241]
9.000”
[229]
40.466”
[1,028]
11.503”
[292]
2.875”
[73]
FRONT VIEW
89.004”
[2,261]
21.000”
[533]
RA-B
2.626”
[67]
Cassette, filter
access panel
85.105”
[2,162]
BOTTOM SECTION VIEW AA
14.000”
[356]
SA-B
Front
Back
TOP VIEW
Supply fan
control box
access panel
41.515”
[1,054]
Typical 2.875” [73]
bottom flange
A
20.657”
[525]
C
Exhaust
air hood
26.958”
[685] 23.634”
[600]
17.500”
[445]
3.790”
[96]
7.247”
[184]
A
22.352”
[568]
D
B
Outdoor
air hood
17.870”
[454]
16.500”
[419]
36.000”
[914] OA
10.836”
[275]
16.000”
[406]
36.180”
[919]
18.298”
[465]
Right
[1,267]
9.313”
[237] 49.876”
SA-E
LEFT VIEW
EA-E
17.500” 9.926”
[444] [252] 4.500”
[114]
48.793”
[1,239]
Power line
input
6.000”
[152]
RIGHT VIEW
48.000”
[1,219]
19.500”
[495]
RA
RA-E
RIGHT VIEW
SA
7.263” [184]
Energy recovery
module
11.739”
[298]
13.750”
[349]
7.598”
[193]
Corner Weights
PTS
LBS
Kg
A
218.89
99.29
B
213.80
96.98
C
211.11
95.75
D
206.20
93.53
TOTAL
850.00 385.55
5.092”
[129]
8.087”
[205]
A minimum of 48.000” [1,219] clearance from any obstruction is required for removal of
energy recovery module, fans and filters.
On vertical discharge units, ductwork is to be attached to accessory roofcurb only.
On horizontal discharge units, field supplied flanges are to be attached to horizontal
discharge openings and ductwork is to be attached to the flanges.
Notes:
Dimensions in [ ] are millimeters.
Center of gravity
Direction of airflow
Optional
Figure B8: ERV3000i unit dimensional drawing
VCES-ERV-IOM-4A – ERV500–3000
43
Left
18.777”
[477]
29.000”
[737]
7.226”
[184]
C
3.042”
[77] 1.918”
[49]
15.625”
[397]
13.321”
[338]
4.680”
8.590” [119]A
[218]
Back
11.415”
[290]
OA-S
FRONT VIEW
89.008”
[2,261]
Cassette
and
filter
access
panel
86.578”
14.000” [2,199]
[356]
Supply
blower
access
panel
SA-T
RA-T
28.000”
[711]
EA-S
11.415”
[290]
X
TOP VIEW
Coil mount
location
Front
26.500”
[673]
OA-T
EA-T
13.250”
[337]
BACK VIEW
Control
box
access
Filter access
(min.clearance
24.000” [610])
D
Y
Right
Coil section
access panel
Coil stub location for
external connections
located in this section
7.392”
6.965” [188]
[177]
13.321”
[338]
16.000”
[406]
Control box
5.667”
[144]
6.166”
B
[157]
24.671”
[627]
11.375”
[289]
10.093”
[256]
EA-E
SA-B
28.000”
[711]
RA-B
11.500”
[292]
LEFT VIEW
OA-E
17.582”
[447]
29.000”
[737]
4.901”
[124]
BOTTOM VIEW
13.250” 14.000”
[337]
[356]
LBS
266
246
246
248
250
237
239
237
239
Exhaust blower
access panel
24.773”
[629]
11.375”
[289]
7.806”
[198]
3.625” [92] typical
bottom flange
Corner Weight Value
No coils
With Dx only
With chilled water
With hydronic
With steam
Dx & hydronic
Dx & steam
Chilled & hydronic
Chilled & steam
A
7.807”
[198]
18.882”
[480]
55.226”
[1,403]
11.375”
[289]
5.877”
5.744” [149]
[146]
16.000”
[406]
13.250”
[337]
LBS
979
1,057
1,054
1,052
1,036
1,130
1,114
1,127
1,111
RA-E
RIGHT VIEW
16.000”
49.878” [406]
[1,267]
SA-E
13.250”
[337]
9.072”
[230]
4.769”
[121]
28.000”
[711]
17.349”
[441] 4.865”
[124]
Variable Dim. Values
Y
X
IN
MM
IN MM
24.5 6222 47.9 1,217
23.8 605 46.5 1,181
23.8 605 46.5 1,181
23.9 607 46.7 1,186
24.0 610 46.9 1,191
23.3 592 45.9 1,166
23.4 594 46.0 1,168
23.3 592 45.9 1,166
23.4 594 46.0 1,168
48.778”
[1,239]
KG
444.1
479.4
478.1
477.2
469.9
512.6
505.3
511.2
503.9
Total Weights
Power line
input
KG
101.2
110.2
110.2
109.3
108.4
113.9
112.9
113.9
112.9
D
7.040”
[179] 7.658”
[195]
Variable Corner Weight Values
B
C
KG
LBS
KG
LBS KG
LBS
120.7 215 97.5 275 124.7 223
111.6 222 100.7 269 122.0 243
111.6 222 100.7 269 122.0 243
112.5 222 100.2 269 122.0 241
113.4 221 100.2 269 122.0 239
107.5 220 99.8 271 122.9 251
108.4 220 99.8 270 122.5 249
107.5 220 99.8 271 122.9 251
108.4 220 99.8 270 122.5 249
A minimum of 48.000” [1,219] clearance from any obstruction is required for removal of energy recovery module,
fans and filters.
On vertical discharge units, ductwork is to be attached to accessory roofcurb only.
On horizontal discharge units, field supplied flanges are to be attached to horizontal discharge openings and
ductwork is to be attached to the flanges.
Notes:
Dimensions in [ ] are millimeters.
Center of gravity
Optional
Figure B9: ERV3000e unit dimensional drawing
VCES-ERV-IOM-4A – ERV500–3000
44
C
A
A
4.866”
[124]
Left
7.300”
[185]
EA-S
26.287”
[668]
13.564”**
[345]
10.126”
[257]
20.748”
[527]
Outdoor
air hood
FRONT VIEW
89.008”
[2,261]
Cassette
and
filter
access
panel
86.578”
[2,199]
TOP VIEW
Front
Supply
blower
access
panel
X
Coil
mount
location
Exhaust air
hood
17.570”
[446]
Back
BACK VIEW
A
D
B
Coil section
access panel
24.544”
[623]
16.034”
[407]
20.698”
[526]
LEFT VIEW
Exhaust
blower
access
panel
7.658”
7.040”[195]
[179]
7.807”
[198]
11.375”
[289]
Power
line input
18.882”
[480]
55.226”
[1,403]
13.250”
[337]
16.000”
[406]
5.744”
[146] 5.877”
[149]
39.875”
[1,013]
13.433”
[341]
26.177”
[665]
BOTTOM SECTION VIEW AA
11.500”
[292]
SA-B
RA-B
28.000”
[711]
RA-E
RIGHT VIEW
16.000”
[406]
49.878”
[1,267]
SA-E
13.250”
[337]
48.778”
[1,239]
4.769”
[121]
9.072”
[230]
28.000”
[711]
17.388”
[442] 4.865”
[124]
A minimum of 48.000” [1,219] clearance from any obstruction is required for removal of energy recovery module,
fans and filters.
Variable Corner Weight Values
Total Weights Variable Dim. Values
A
B
C
D
Y
X
Corner Weight Value LBS KG
LBS
KG
LBS KG
LBS
KG
LBS
KG
IN
MM
IN MM
No coils
282 127.9 226 102.5 284 128.8 233 105.6 1,025 464.9 24.5 622 48.9 1,248
With Dx only
283 128.3 245 111.1 309 140.1 266 120.6 1,103 500.3 23.8 605 47.5 1,207
With chilled water
283 128.3 244 110.6 308 139.7 265 120.2 1,100 498.9 23.8 605 47.5 1,207
With hydronic
284 128.8 243 110.2 308 139.7 263 119.3 1,098 498.0 23.9 607 47.7 1,212
With steam
282 127.9 226 102.5 304 137.8 257 116.5 1,082 490.8 24.0 610 47.9 1,217
Dx & hydronic
291 131.9 258 117.0 332 150.5 295 133.8 1,176 533.4 23.3 592 46.9 1,191
Dx & steam
289 131.0 255 115.6 327 148.3 289 131.0 1,160 526.1 23.4 594 47.0 1,194
Chilled & hydronic
290 131.5 258 117.0 331 150.1 294 133.0 1,173 532.0 23.3 592 46.9 1,191
Chilled & steam
288 130.6 255 115.6 326 147.8 388 175.9 1,157 524.8 23.4 594 47.0 1,194
On vertical discharge units, ductwork is to be attached to accessory roofcurb only.
On horizontal discharge units, field supplied flanges are to be attached to horizontal discharge openings and
ductwork is to be attached to the flanges.
Notes:
Dimensions in [ ] are millimeters.
Center of gravity
Optional
3.625” [92] typical
bottom flange
Coil stub location for
external connections
located in this section
Y
Right
Control box
**Note: If the unit has Package A Blowers, the exhaust air opening
dimensions change to 13.126” [333] wide by 11.501” [292] high.
Control box
access
Filter access
(min.clearance 12.366”**
24.000”[610])
[314]
Appendix C: Rigging Drawing
Spreader bars
Note:
Remove all packaging before beginning to rig
the unit onto the installed roofcurb.
For the ERV500e, field supplied support beams
such as a “C” channel are required under and
attached to the base.
Figure C1: Rigging – ERV500e
VCES-ERV-IOM-4A – ERV500–3000
45
Spreader bars
Note: Remove all packaging before beginning
to rig the unit onto the installed roofcurb.
Figure C2: Rigging for ERV1500e, ERV2000e and ERV3000i/e (ERV1500e shown)
VCES-ERV-IOM-4A – ERV500–3000
46
Appendix D: Typical Installations
Exhaust air
from space
Min. 36”
[914 mm]
Flow measuring
station (FMS)
Balancing
damper
Flexible duct
connection
Supply air
to space
Min. 36”
[914 mm]
Min. 12”
[305 mm]
Exhaust air
to outside
Min. 36”
[914 mm]
Supply air
from outside
Figure D1: ERV500i typical indoor installation and minimum distance requirements
Supply to space
Balancing
damper
2 D ft m
in.
Exhaust outside
Backdraft
damper
Flow
measuring
station
5 D ft m
in.
Exhaust from
space
inimum
cf in. m
Intake from
outside
Cf - Front clearance required
to remove components for
maintenance. See Table D1.
Balancing
damper
2 D ft m
Straight duct section required
to achieve good airflow rates.
(see Field Fabricated Ductwork)
Minim
um dis
tan
10 ft. o
r accord ce between
exterio
ing to
r
local b
uilding hoods
codes
in.
All connections made
with flexible collars
supplied by others
2 D ft m
in.
Flow
measuring
station
5 D ft m
in.
If electric pre-heat is used
locate it here (min. 24” from unit)
Figure D2: ERV1000i to ERV3000i typical indoor installation and minimum distance requirements (ERV2000i shown)
D – Equivalent round duct diameter for determining
minimum lengths
8” x 20” [203 x 508 mm] duct
D =14.3” [363 mm]
Cf – Front clearance required for maintenance.
See Table D1.
12” x 26” [305 x 660 mm] duct
D =19.9” [505 mm]
Table D1: Minimum Clearance Required for Access on Indoor Units
ERV500i, ERV1000i & ERV1500i
Front clearance (Cf)
Back clearance
ERV2000i
ERV3000i
42” [1,067 mm]
48” [1,219 mm]
48” [1,219 mm]
24” [610 mm] required for simplified 24” [610 mm] required for simplified 30” [762 mm] required for simplified
access to service exhaust fan
access to service exhaust fan
access to service exhaust fan
VCES-ERV-IOM-4A – ERV500–3000
47
Outdoor air
Exhaust air
Roofcurb
Supply air
Return air
Figure D3: Typical outdoor installation layout (ERV1500e shown)
VCES-ERV-IOM-4A – ERV500–3000
48
Appendix E: Hood Installation
Detail A
See Detail A
Screw: #10 x 3/4
Detail B
Male
Black
Female
Female
White
See Detail B
Black
Male
White
Figure E1: ERV500e hood installation
See Detail B
See Detail A
Figure E2: Typical hood installation (ERV1500e shown)
VCES-ERV-IOM-4A – ERV500–3000
49
Appendix F: Components
1
3
8
5
11
10
13
12
9
2
4
14
7
6
Item
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Description
Supply fan assembly
Exhaust fan assembly
Control box
Supply filter
Exhaust filter
Outdoor air damper actuator
Outdoor air damper
Enthalpy wheel
Wheel wiper seal
Wheel drive access
Wheel drive motor
Wheel drive pulley
Wheel drive belt
Wheel perimeter seal
Some unit components listed above are optional.
Consult the unit nomenclature for standard and
optional components.
Figure F1: ERV500i components
15
11
9
8 12 2
17
1
3
5
4
7
6
13
10
14
18
Item
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Description
Exhaust fan assembly
Enthalpy wheel
Wheel drive motor
Wheel drive pulley
Wheel drive belt
Wheel perimeter seal
Wheel wiper seal
Outside air damper actuator
Outdoor air damper
Exhaust damper actuator
Exhaust damper
Supply filter set – one per set
Exhaust filter set – one per set
Oudoor air intake hood
Exhaust air hood
Wire mesh birdscreen
Control box
Supply fan assembly
Some unit components listed above are optional.
Consult the unit nomenclature for standard and
optional components.
16
17
Figure F2: ERV500e components
VCES-ERV-IOM-4A – ERV500–3000
50
13
1
4
7
5
8
2
10
9
Description
Fan assembly
Supply filter set – two per set
Exhaust filter set – two per set
Pressure differential switch (dirty filter)
Enthalpy wheel
Wheel drive motor
Wheel drive pulley
Wheel drive belt
Wheel perimeter seal
Wheel wiper seal
Defrost damper actuator
Defrost damper
Control Box
Some unit components listed above are optional.
Consult the unit nomenclature for standard and
optional components.
3
6
11 12
Item
1
2
3
4
5
6
7
8
9
10
11
12
13
Figure F3: ERV1000i components
6
5
1
2
4
Supply fan
3
17
13
14
10
11
7
20
19
16
6
22
5
21
4
1
12
2
15
Exhaust fan
9
18
8
3
Item
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
Description
Housing
Fan
Fan pulley
Fan belt
Adjustable sheave
Fan motor
Enthalpy wheel
Wheel drive motor
Wheel drive pulley
Wheel drive belt
Wheel perimeter seal
Wheel wiper seal
Defrost damper actuator
Defrost damper
Supply filter set – two per set
Exhaust filter set – two per set
Fan isolation
Purge section
Pressure differential switch (dirty filter)
Control box
Pre-heater
Pre-heat outdoor air damper
Some unit components listed above are optional.
Consult the unit nomenclature for standard and
optional components.
17
Figure F4: ERV1500i components
VCES-ERV-IOM-4A – ERV500–3000
51
13
26 27 14 10
11
7
25
23
19
18
Item
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
6
5
4
1
2
3
Supply fan
17
24
12
9
22
6
5
21
8
26
4
1
15
2
16
Description
Housing
Fan
Fan pulley
Fan belt
Adjustable sheave
Fan motor
Enthalpy wheel
Wheel drive motor
Wheel drive pulley
Wheel drive belt
Wheel perimeter seal
Wheel wiper seal
Defrost damper actuator
Defrost damper
Exhaust damper actuator
Exhaust damper
Supply filter set – two per set
Exhaust filter set – two per set
Outdoor air intake hood
Exhaust air hood
Fan isolation
Purge section
Pressure differential switch (dirty filter)
Aluminum mesh prefilter
Control box
Pre-heater
Pre-heat outdoor air damper
Some unit components listed above are optional.
Consult the unit nomenclature for standard and
optional components.
20
Exhaust fan
3
21
Figure F5: ERV1500e components
1
4
2
5
6
3
17
9
10
8
12
15
16
7
13 14
11
Item
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
Description
Housing
Fan
Fan pulley
Fan belt
Adjustable sheave
Fan motor
Enthalpy wheel
Wheel drive motor
Wheel drive pulley
Wheel drive belt
Wheel perimeter seal
Wheel wiper seal
Defrost damper actuator
Defrost damper
Supply filter set – two per set
Exhaust filter set – two per set
Pressure differential switch (dirty filter)
Some unit components listed above are optional.
Consult the unit nomenclature for standard and
optional components.
Figure F6: ERV2000i components
VCES-ERV-IOM-4A – ERV500–3000
52
17 1 2 3 4 5 6 25 21 9 10 12 7 13 19 14 11 15 16 22
18
24
Exhaust fan
23
20
8
Item
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
Description
Housing
Fan
Fan pulley
Fan belt
Adjustable sheave
Fan motor
Enthalpy wheel
Wheel drive motor
Wheel drive pulley
Wheel drive belt
Wheel perimeter seal
Wheel wiper seal
Defrost damper actuator
Defrost damper
Outdoor air damper actuator
Outdoor air damper
Exhaust damper actuator
Exhaust damper
Supply filter set – two per set
Exhaust filter set – two per set
Pressure differential switch (dirty filter)
Outdoor air intake hood
Exhaust air hood
Aluminum mesh prefilter
Control box
Some unit components listed above are optional.
Consult the unit nomenclature for standard and
optional components.
Figure F7: ERV2000e components
20
6
1
5
13
14
4
16
Exhaust fan
2
15
3
25
21
16
25
17 24 10
7
22
11
18
6
5
19
23
4
1
2
3
20
Item
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
Description
Fan housing
Fan
Fan pulley
Fan belt
Adjustable sheave
Fan motor
Enthalpy wheel
Wheel drive motor
Wheel drive pulley
Wheel drive belt
Wheel perimeter seal
Wheel wiper seal
Defrost damper actuator
Defrost damper
Outdoor air damper actuator
Outdoor air damper
Primary supply filter set – three per set
Exhaust filter set – three per set
Pressure differential switch (dirty filter)
Blower flex connector
Fan isolation
Purge section
Control box
Secondary supply filter set – three per set
Pre-heater
Some unit components listed above are optional.
Consult the unit nomenclature for standard and
optional components.
Supply fan
21
12
9
8
Figure F8: ERV3000i components
VCES-ERV-IOM-4A – ERV500–3000
53
14
19 29 10
26
11
7
20
6
5
21
28
4
1
2
3
24
Supply fan
25
30
12
24
1
9
6
8
5
13
22
14
17
18
23
4
2
Exhaust fan
15
3
16
27
Item
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Description
Housing
Fan
Fan pulley
Fan belt
Adjustable sheave
Fan motor
Enthalpy wheel
Wheel drive motor
Wheel drive pulley
Wheel drive belt
Wheel perimeter seal
Wheel wiper seal
Defrost damper actuator
Defrost damper
Outdoor air damper actuator
Outdoor air damper
Exhaust damper actuator
Exhaust damper
Primary supply filter set – three per set
Exhaust filter set – three per set
Pressure differential switch (dirty filter)
Outdoor air intake hood
Exhaust air hood
Blower flex connector
Fan isolation
Purge section
Aluminum mesh prefilter
Control box
Secondary supply filter set –three per set
Pre-heater
Some unit components listed above are optional.
Consult the unit nomenclature for standard and
optional components.
25
Figure F9: ERV3000e components
VCES-ERV-IOM-4A – ERV500–3000
54
Appendix G: Terminal Control Diagrams
Wall Control Connection
Occupied Timer/Sensor Connection
Two types of remote wall controls are available:
Occupancy control is achieved by connection to the terminal interface shown below. These terminals require a dry
contact which could be provided by a number of types of
controls such as a timer, light sensor, occupancy sensor,
Building Management System or other. The unit will not
operate unless these contacts are closed!!
1. Standard wall control with fan switch and dehumidistat control.
2. Xtra wall control with fan mode selection, dehumidistat control and maintenance indicator.
The remote wall controls work with the integrated electronic controls within the unit to control ventilation sequences. Each wall control above has different features
and will require four-wire connection to the unit as shown
below. Without the wall control, fans can be operated
with dry contacts or a switch as in Figure G5.
The drawing below shows a factory installed jumper and
programmable timer option.
IMPORTANT
All controls accessories (ex. night setback timer, CO2
controller, enthalpy controller, smoke detector or wheel
rotation sensor) intended to provide a contact closure for
occupancy control across terminals 3 and 4 cannot be
used in conjunction with the Xtra wall control.
IMPORTANT
All controls accessories (ex. night setback timer, CO2
controller, enthalpy controller, smoke detector or wheel
rotation sensor) intended to provide a contact closure for
occupancy control across terminals 3 and 4 cannot be
used in conjunction with the Xtra wall control.
If a wall control is required in addition to any of these
options, only the standard wall control may be used.
Without these options, a factory installed jumper across
terminals 3 and 4 must be installed.
If a wall control is required in addition to any of these
options, only the standard wall control may be used.
Without these options, a factory installed jumper across
terminals 3 and 4 must be installed.
JUMPER
(factory installed)
NSB Timer
OCCUPANCY CONTROL
(field installed)
CONTROL CONTACTS
1
CONTROL CONTACTS
1
BLACK
2
RED
GREEN
11
YELLOW
12
LOW
13
3
COMMON
14
4
HIGH
15
5
DIRTY
FILTER
INDICATOR
16
6
(+) 24 VAC
(1.5A–24 VAC)
17
7
(ERV UNITS)
18
8
BLACK
WALL CONTROL
2
RED
1
CONTROL CONTACTS
1
GREEN
BLACK
11
WALL CONTROL
JUMPER
2
3
4
YELLOW
RED
OCCUPIED
TIMER/
SENSOR
12
LOW
13
COMMON
14
Wall
Control
JUMPER
3
4
5
OCCUPIED
TIMER/
SENSOR
(−) 24 VAC
(+) 24 VAC
7
(ERV UNITS)
8
9
10
ENTHALPY
(ERV UNITS)
(RECIRC UNITS)
WHEEL
ALARM
OPTION
(24 VAC)
UNOCC.
RECIRC
CONTACTS
A
HIGH
15
DIRTY
FILTER
INDICATOR
16
(1.5A–24 VAC)
17
(−) 24 VAC
(40 VA)
6
(+) 24 VAC
7
(ERV UNITS)
8
9
10
ENTHALPY
(ERV UNITS)
(RECIRC UNITS)
WHEEL
ALARM
OPTION
(24 VAC)
UNOCC.
RECIRC
CONTACTS
A
FIELD WIRED
TERMINALS
B
CLASS 2 VOLTAGE
NOTE:
Connections are all dry contacts
except wall control, wheel alarm
contacts and 24 VAC power contacts.
Use of 24 VAC circuit requires
isolating contacts (ex. thermostat)
to prevent interconnection of
Class 2 outputs.
11
3
4
12
LOW
13
COMMON
14
HIGH
15
DIRTY
FILTER
INDICATOR
16
(1.5A–24 VAC)
17
5
OCCUPIED
TIMER/
SENSOR
(−) 24 VAC
(40 VA)
FIELD WIRED
TERMINALS
B
19
9
20
10
CLASS 2 VOLTAGE
5
2
(40 VA)
6
GREEN
YELLOW
WALL CONTROL
M
ENTHALPY
(ERV UNITS)
(RECIRC UNITS)
WHEEL
ALARM
OPTION
(24 VAC)
UNOCC.
RECIRC
CONTACTS
FIELD WIRED
TERMINALS
A
B
18
19
20
CLASS 2 VOLTAGE
NOTE:
Connections are all dry contacts
except wall control, wheel alarm
contacts and 24 VAC power contacts.
NOTE:
Connections are all dry contacts
except wall control, wheel alarm
contacts and 24 VAC power contacts.
Use of 24 VAC circuit requires
isolating contacts (ex. thermostat)
to prevent interconnection of
Class 2 outputs.
Use of 24 VAC circuit requires
isolating contacts (ex. thermostat)
to prevent interconnection of
Class 2 outputs.
Figure G2: Occupied timer/sensor connection
18
19
20
Enthalpy Control
ERVs can be controlled by an enthalpy controller that
switches between free cooling and AC unit cooling. When
free cooling is possible, the ERV will ventilate without energy recovery (the enthalpy wheel stops) on a call for cooling. The ventilation rate is not affected. If the unit is not
operating, enthalpy control contact will initiate low speed
ventilation. The enthalpy control must be connected in
conjunction with a cooling thermostat control to prevent
free cooling from initiating in heating seasons as shown
below.
Figure G1: Wall control connection
VCES-ERV-IOM-4A – ERV500–3000
55
CONTROL CONTACTS
CONTROL CONTACTS
1
THERMOSTAT
(FIELD SUPPLIED)
R
GREEN
11
1
WALL CONTROL
2
RED
YELLOW
12
LOW
13
COMMON
14
HIGH
15
DIRTY
FILTER
INDICATOR
16
2
C
3
OCCUPIED
TIMER/
SENSOR
4
TO AC UNIT
COIL (24 VAC)
5
(−) 24 VAC
6
(+) 24 VAC
7
(ERV UNITS)
GREEN
11
YELLOW
12
LOW
13
COMMON
14
HIGH
15
DIRTY
FILTER
INDICATOR
16
(1.5A–24 VAC)
17
BLACK
REMOTE FAN SWITCH
WALL CONTROL
RED
3
JUMPER
Y
BLACK
OCCUPIED
TIMER/
SENSOR
4
LOW
HIGH
(40 VA)
TO AC UNIT
COIL (GND)
8
+
−
−
A/ENT
SENSOR
LOW HI
(RECIRC UNITS )
A
24 VAC
UNOCC.
RECIRC
CONTACTS
FIELD WIRED
TERMNIALS
B
5
(−) 24 VAC
(40 VA)
17
18
19
20
6
(+) 24 VAC
7
(ERV UNITS)
ENTHALPY
8
CLASS 2 VOLTAGE
NOTE:
Connections are all dry contacts
except wall control, wheel alarm
contacts and 24 VAC power
contacts.
A/DIFF-ENT ENTHALPY CONTROL
MOUNTED IN OUTDOOR AIRSTREAM
Setpoint PN 500053119S (A/Diff-ENT)
Differential PN 500053120S (A/Ent)
MOUNTED IN
RETURN AIRSTREAM
(ERV UNITS)
(24 VAC)
10
GND
(1.5A–24 VAC)
WHEEL
ALARM
OPTION
9
+
ENTHALPY
9
10
Use of 24 VAC circuit requires
isolating contacts
(ex. thermostat) to prevent
interconnection of Class 2
outputs.
FIELD WIRED
TERMINALS
B
18
19
20
CLASS 2 VOLTAGE
NOTE:
Connections are all dry contacts
except wall control, wheel alarm
contacts and 24 VAC power contacts.
CONTROL CONTACTS
C
1
BLACK
GREEN
11
WALL CONTROL
JUMPER
2
TO AC UNIT
COIL (24 VAC)
3
4
RED
OCCUPIED
TIMER/
SENSOR
5
(−) 24 VAC
6
(+) 24 VAC
YELLOW
12
LOW
13
COMMON
14
HIGH
15
DIRTY
FILTER
INDICATOR
16
(40 VA)
7
TO AC UNIT
COIL (GND)
W
NC
8
9
T675A TEMP.
CONTROLLER
10
(ERV UNITS)
ENTHALPY
(1.5A–24 VAC)
(ERV UNITS)
(RECIRC UNITS )
WHEEL
ALARM
OPTION
(24 VAC)
A
UNOCC.
RECIRC
CONTACTS
FIELD WIRED
TERMNIALS
B
17
18
19
Figure G5: Remote fan control
Dirty Filter Sensor
The ERV can be equipped with dirty filter sensors which
monitor the pressure across the filters and close the contacts when the filters become restricted with dirt. Connections on the terminal interface labeled ‘Dirty Filter
Indicator’ provide the dry contact and may be connected
as shown below.
20
CONTROL CONTACTS
CLASS 2 VOLTAGE
Setpoint PN 1604130 (T675A)
NOTE:
Connections are all dry
contacts except wall control,
wheel alarm contacts and
24 VAC power contacts.
Use of 24 VAC circuit requires
isolating contacts
(ex. thermostat) to prevent
interconnection of
Class 2 outputs.
Figure G4: Thermostat (dry bulb) control
1
GREEN
11
YELLOW
12
BLACK
WALL CONTROL
2
JUMPER
B
R
NO CM
UNOCC.
RECIRC
CONTACTS
Use of 24 VAC circuit requires
isolating contacts (ex. thermostat)
to prevent interconnection of
Class 2 outputs.
THERMOSTAT
(FIELD SUPPLIED)
R
(RECIRC UNITS)
WHEEL
ALARM
OPTION
(24 VAC)
A
Figure G3: Setpoint/differential enthalpy control
Y
(ERV UNITS)
Note: Not all units have two speeds.
Single speed units will be activated
with either Low-Com or High-Com
connection.
3
4
5
RED
OCCUPIED
TIMER/
SENSOR
LOW
13
COMMON
14
HIGH
15
DIRTY
FILTER
INDICATOR
16
(1.5A–24 VAC)
17
(−) 24 VAC
(40 VA)
Remote Fan Control
Remote fan control can be achieved by connecting dry
contact controls to the terminal interface at terminals
labeled: Low-Com-High (not all units have two speeds).
Placing a jumper across the Low and Com terminals will
put the unit in low speed ventilation or placing a jumper
across the High and Com terminals will put the unit into
high speed. Do not jumper all three terminals together.
These controls could also be the following: SPDT switch,
dehumidistat, CO2 sensor, light sensor, heat sensor, timer,
Building Management System, etc. The drawing below
represents a switch connected to the unit.
6
(+) 24 VAC
7
(ERV UNITS)
8
9
10
ENTHALPY
(ERV UNITS)
(RECIRC UNITS)
WHEEL
ALARM
OPTION
(24 VAC)
UNOCC.
RECIRC
CONTACTS
A
FIELD WIRED
TERMINALS
B
18
19
20
CLASS 2 VOLTAGE
24 VAC LIGHT
or INDICATOR
(supplied by others)
NOTE:
Connections are all dry contacts
except wall control, wheel alarm
contacts and 24 VAC power contacts.
Use of 24 VAC circuit requires
isolating contacts (ex. thermostat)
to prevent interconnection of
Class 2 outputs.
Figure G6: Dirty filter sensor
CAUTION
Do not use a wall control and remote fan switch at the
same time. Damage to the unit may occur.
VCES-ERV-IOM-4A – ERV500–3000
56
Wheel Rotation Sensor Used as Low
Temperature Control (Wheel Failure)
Wheel Rotation Sensor
ERVs can be equipped with a wheel rotation sensor board
but must be ordered with a control board. On power up
of the unit, the wheel rotation sensor board’s relay coil
is activated and closes the ‘NO’ set of contacts that are
wired to the Occ/Unocc control terminals on the unit. In
this condition, the unit is allowed to operate in a normal
occupied state. When a wheel rotation failure occurs, the
relay coil is de-activated and opens the contacts that are
wired to the Occ/Unocc control terminals. In this condition, the unit is in an unoccupied state. The fans are deenergized and the outdoor air dampers will close.
The wheel rotation sensor board has jumpers that can
be used to set the time duration (one, two, four or eight
minutes) for the alarm to be activated after the wheel failure. This alarm can be used to turn on an alarm light (see
Figure G9) or to protect downstream coils from freezing in
below zero conditions.
IMPORTANT
The wheel rotation sensor option must be ordered with
a unit control board for wall control compatibility. The
wheel rotation sensor option cannot be ordered with a
non-defrost unit.
GREEN
11
YELLOW
12
LOW
13
COMMON
14
HIGH
15
DIRTY
FILTER
INDICATOR
16
(1.5A–24 VAC)
17
BLACK
IMPORTANT
If the wheel rotation sensor board shuts the unit down,
the only procedure to re-start the unit is to turn the
power off and then back on again.
A set of 24 VAC wheel alarm contacts are available on the
terminals to power a light or indicator. The drawing below
shows the wiring necessary to power the 24 VAC light or
indicator.
CAUTION
CONTROL CONTACTS
1
ERVs can be equipped with a wheel rotation sensor option. This option cannot be ordered for a non-defrost unit.
This option cannot be used in conjunction with a digital
wall control and must be ordered with a control board.
With the wheel rotating, the wheel rotation sensor board
activates the relay coil and closes the ‘NO’ (normally open)
set of contacts across the occupied/timer sensor contacts
(Pin 3 and 4), allowing the unit to operate. If the wheel
rotation stops (unless in an enthalpy state, defrost mode
or unoccupied condition), the contacts will be open and
cause the motors to shut down and the dampers (optional) to close.
The wheel rotation sensor printed circuit board has 120
VAC wired to two terminals. Improper wiring or handling
of the circuit board could damage the board, the unit or
cause personal injury.
WALL CONTROL
2
WRS BOARD RELAY
'NC' CONTACTS
(normally closed –
opens on wheel failure)
3
4
5
RED
OCCUPIED
TIMER/
SENSOR
(−) 24 VAC
(40 VA)
6
7
(+) 24 VAC
(ERV UNITS)
ENTHALPY
LED 1
2
3
J1 J2
DELAY
CAUTION
120 VAC
NO COM NC 24V COM SEN VEN ALA DIS
DEF+ DEF−
NO = NORMALLY OPEN
NC = NORMALLY CLOSED
COM = COMMON
NO COM NC
RELAY
COM
NO
24 VAC LIGHT or INDICATOR
(supplied by others)
8
9
10
(ERV UNITS)
(RECIRC UNITS)
WHEEL
ALARM
OPTION
(24 VAC)
UNOCC.
RECIRC
CONTACTS
A
FIELD WIRED
TERMINALS
B
NC
18
19
24V = 24 VAC
COM = COMMON
SEN = SENSOR
24 COM SEN
ALA = RELAY ON (24 VAC LIGHT, MAX. 1 AMP)
DIS = ROTATION DETECTOR DISABLE (24 VAC)
VEN = VENTILATION MODE (DISABLE WRS) (24 VAC)
20
VEN ALA DIS
CLASS 2 VOLTAGE
NOTE:
Connections are all dry contacts
except wall control, wheel alarm
contacts and 24 VAC power contacts.
Use of 24 VAC circuit requires
isolating contacts (ex. thermostat)
to prevent interconnection of
Class 2 outputs.
COM SEN
CAUTION
120 VAC
DEF+ = DEFROST MODE (DISABLE WRS) (120 VAC)
DEF- = DEFROST MODE (DISABLE WRS) (120 VAC)
DEF+ DEF-
DELAY
J1 & J2 = DETECTION DELAY
J1
J1 J2
*
Figure G7: Wheel rotation sensor used as low temperature
control
J2
X
X
X
X
DELAY
1 min.
2 min.
4 min.
8 min.
SENSOR
MAGNET
*default
LED 1
2
3
1 = RELAY ON (RED)
2 = POWER ON (GREEN)
3 = SENSOR DETECTION INDICATOR (YELLOW)
Figure G8: Wheel rotation sensor board
VCES-ERV-IOM-4A – ERV500–3000
57
Unoccupied Recirc Contacts
CONTROL CONTACTS
1
GREEN
11
YELLOW
12
LOW
13
COMMON
14
HIGH
15
On recirc defrost units, an unoccupied recirc control can
be achieved by connection to the terminal interface shown
below. These terminals require a 24 VAC signal which
could be provided by a timer, thermostat or other. Closure
of these terminals will cause the unit to go into a recirc
mode where the supply fan runs on high speed and the
exhaust fan stops.
DIRTY
FILTER
INDICATOR
16
IMPORTANT
(1.5A–24 VAC)
17
BLACK
WALL CONTROL
2
WRS BOARD RELAY
'NC' CONTACTS
(normally closed –
opens on wheel failure)
RED
3
OCCUPIED
TIMER/
SENSOR
4
5
(−) 24 VAC
(40 VA)
24 VAC LIGHT or INDICATOR
(supplied by others)
6
(+) 24 VAC
7
(ERV UNITS)
ENTHALPY
8
9
10
(ERV UNITS)
(RECIRC UNITS)
WHEEL
ALARM
OPTION
(24 VAC)
UNOCC.
RECIRC
CONTACTS
A
FIELD WIRED
TERMINALS
B
18
19
20
Although these contacts are intended for use during
unoccupied periods, they are still active during an occupied condition. Therefore, the 24 VAC signal should be
applied such that it is disabled during occupied periods,
preventing the unit from going into a recirc condition unnecessarily.
CONTROL CONTACTS
CLASS 2 VOLTAGE
NOTE:
Connections are all dry contacts
except wall control, wheel alarm
contacts and 24 VAC power contacts.
Use of 24 VAC circuit requires
isolating contacts (ex. thermostat)
to prevent interconnection of
Class 2 outputs.
1
2
3
OCCUPIED
TIMER/
SENSOR
CO2 Ventilation Control
5
ERVs can be controlled by a CO2 controller that can be
connected to fan control Low-Com-High (not all units
have two speeds). As the CO2 levels exceed acceptable
limits, the dry contact across High-Com is closed, raising
high speed fan ventilation.
6
(+) 24 VAC
7
(ERV UNITS)
8
9
RED
11
YELLOW
12
LOW
13
8
10
7
FACTORY MOUNTED
JUMPER
6
3
4
OCCUPIED
TIMER/
SENSOR
COMMON
14
HIGH
15
DIRTY
FILTER
INDICATOR
16
(1.5A–24 VAC)
17
5
(−) 24 VAC
(+) 24 VAC
7
(ERV UNITS)
8
9
10
ENTHALPY
(ERV UNITS)
(RECIRC UNITS)
WHEEL
ALARM
OPTION
(24 VAC)
UNOCC.
RECIRC
CONTACTS
A
FIELD WIRED
TERMINALS
B
COMMON
14
HIGH
15
DIRTY
FILTER
INDICATOR
16
(1.5A–24 VAC)
17
(−) 24 VAC
ENTHALPY
(ERV UNITS)
(RECIRC UNITS)
WHEEL
ALARM
OPTION
(24 VAC)
UNOCC.
RECIRC
CONTACTS
18
19
24 VAC
required
18
A
FIELD WIRED
TERMINALS
B
NOTE:
Connections are all dry contacts
except wall control, wheel alarm
contacts and 24 VAC power contacts.
4
2
1
Note: Unoccupied recirculation
is available on units with
recirculation defrost option only.
Use of 24 VAC circuit requires
isolating contacts (ex. thermostat)
to prevent interconnection of
Class 2 outputs.
1
2
20
NO
(40 VA)
6
13
CLASS 2 VOLTAGE
NC
3
5
LOW
CO2 SENSOR
WALL CONTROL
2
12
(40 VA)
CONTROL CONTACTS
GREEN
YELLOW
RED
4
BLACK
11
WALL CONTROL
Figure G9: Wheel rotation alarm
1
GREEN
BLACK
AC GROUND
AC INPUT
Figure G11: Unoccupied recirc contacts
19
20
Note 1: Terminal 5 on CO2 sensor
used only with two-speed units.
Note 2: Terminal 7 and 8 on CO2
sensor used only with blower VFDs.
CLASS 2 VOLTAGE
NOTE:
Connections are all dry contacts
except wall control, wheel alarm
contacts and 24 VAC power contacts.
Use of 24 VAC circuit requires
isolating contacts (ex. thermostat)
to prevent interconnection of
Class 2 outputs.
NORMAL OPERATION – LOW SPEED
CO2 LEVELS EXCEED SETPOINT – HIGH SPEED
Figure G10: CO2 ventilation control
VCES-ERV-IOM-4A – ERV500–3000
58
Smoke Detector
Locate in a normally occupied area of premises. Recommended for compliance to NFPA-90A and IMC code 606.
ERVs can be equipped with a duct mount smoke detector
which will monitor the air when passing through the duct
system into the ERV. When sufficient smoke is detected,
an alarm condition is activated. By connecting the occupied timer/sensor contacts to the ‘NC’ alarm auxiliary contacts on the duct sensor, an alarm condition will open the
auxiliary contact and stop operation of the ERV.
1
2
AVAILABLE POWER INPUTS
12
13
14
24V
15
ALARM AUXILIARY CONTACTS
FOR FAN SHUTDOWN, ETC.
16
N.C.
120
VAC
220/240
VAC
17
C.
18
19
C.
N.O.
N.O.
20
N.C.
ALARM AUXILIARY CONTACTS SHOWN IN
STANDBY. CONTACTS TRANSFER DURING
ALARM AS INDICATED BY THE ARROWS.
2 ALARM
RED
GRN.
TROUBLE CONTACTS CLOSED IN ALARM AND
STANDBY. CONTACTS OPEN WHILE DETECTOR
HEAD OR POWER IS REMOVED, AND DURING
RESET. OPEN CONTACTS SIGNAL TROUBLE
CONDITION TO PANEL.
5
(+) ALARM SIGNAL
1 COMMON
6
FIELD
INSTALLED
JUMPER
10
3 POWER
9
N.O.
(D) AUX POWER
7
TROUBLE CONTACT RATING
0.3A @ 32 VAC/DC
TROUBLE CONTACTS CLOSED IN
STANDBY AND ALARM. CONTACTS
OPEN WHILE DETECTOR HEAD OR
POWER IS REMOVED, AND DURING
RESET. OPEN CONTACTS EXTINGUISH
OPTIONAL APA451 GREEN POWER
LED TO INDICATE TROUBLE CONDITION.
(+) AUX POWER
TROUBLE
CONTACTS
11
ALARM AUXILIARY CONTACT RATINGS
10A @ 30 VDC
10A @ 250 VAC (0.75 POWER FACTOR)
240VA @ 240 VAC (0.4 POWER FACTOR)
1/8 HP @ 120 VAC
1/4 HP @ 240 VAC
500mA MINIMUM @ 24 VDC
NOT INTENDED FOR CONNECTION
TO CONTROL PANELS.
ALARM INITIATION CONTACT RATING
2.0A @ 30 VAC/DC (0.6 POWER FACTOR)
ALARM INITIATION CONTACTS
8
POWER INPUTS ACCEPT
24 VDC, 24 VAC 50–60 HZ,
120 VAC 50–60 HZ, OR
220/240 VAC 50–60 HZ.
CONNECT POWER SOURCE
TO APPROPRIATE TERMINALS
OF EACH DETECTOR.
CONTROL CONTACTS
1
GREEN
11
YELLOW
12
LOW
13
COMMON
14
HIGH
15
DIRTY
FILTER
INDICATOR
16
(1.5A–24 VAC)
17
BLACK
WALL CONTROL
2
3
4
5
RED
OCCUPIED
TIMER/
SENSOR
(−) 24 VAC
(40 VA)
6
(+) 24 VAC
7
(ERV UNITS)
8
9
10
ENTHALPY
(ERV UNITS)
(RECIRC UNITS)
WHEEL
ALARM
OPTION
(24 VAC)
UNOCC.
RECIRC
CONTACTS
A
FIELD WIRED
TERMINALS
B
18
19
20
CLASS 2 VOLTAGE
NOTE:
Connections are all dry contacts
except wall control, wheel alarm
contacts and 24 VAC power contacts.
Use of 24 VAC circuit requires
isolating contacts (ex. thermostat)
to prevent interconnection of
Class 2 outputs.
Figure G12: Smoke detector
VCES-ERV-IOM-4A – ERV500–3000
59
Appendix H: Troubleshooting
Table H1: ERV500i/e Troubleshooting
Problem
Unit will not turn on.
Unit will not turn off.
Air from supply diffusers too cold.
Unit makes an annoying noise.
Enthalpy wheel not running.
Cause
Solution
External wiring not connected.
Check external wiring.
Internal wiring not making contact.
Occupied/unoccupied control circuit
is open.
Check the wiring in the control box.
Check if high or low speed control contacts are closed
on the terminal strip.
Check filters and enthalpy wheel for blockage. Check
Imbalance of supply and exhaust air.
balance of airflow. Install post-heat module.
Remove the motor/blower assembly.
Blower wheel out of alignment.
Adjust blower wheel.
Enthalpy wheel brush seal not
Check for proper seal operation.
functioning properly.
Check unit circuit breaker. Check two-wire service
Electrical supply interrupted.
connector on motor.
Check capacitor connections. Check motor operation
Drive motor capacitor.
with new capacitor.
Drive motor failure.
Check the drive motor.
External terminal strip wiring.
Drive motor relay in control box.
Drive belt.
Drive pulley.
Free cooling contact closed.
VCES-ERV-IOM-4A – ERV500–3000
Check relay wiring. Check relay operation.
Check for drive belt derailment off of drive pulley or
failure.
Check for securely fastened pulley on motor shaft.
Fan motor failure.
Open contact on external terminal block of unit.
Check unit circuit breaker. Check three-wire service
connector on each motor.
Check capacitor connections. Check motor operation
with a new capacitor.
Check fan motor.
Fan motor relay in control box.
Check relay wiring. Check relay operation.
Electrical supply interrupted.
Motor and blower not functioning.
Close circuit.
Fan motor capacitor.
60
Table H2: Troubleshooting – ERV1000i, ERV1500i/e, ERV2000i/e, ERV3000i/e
Problem
Cause
Solution
Check external wiring.
Unit will not turn on.
Unit will not turn off.
Air from supply diffusers too cold.
Unit makes an annoying noise.
Enthalpy wheel freezing.
Occupied timer contacts open.
Check the control board for power.
Check if high or low speed control contacts are closed
External terminal strip wiring.
on the terminal strip.
Check filters and heat exchanger for blockage. Check
Imbalance of supply and exhaust air.
balance of airflows. Install post-heat module.
Remove the motor/blower assembly.
Blower wheel out of alignment.
Adjust blower wheel.
Enthalpy wheel wiper seal not
Check for proper seal operation.
functioning properly.
Check filters and heat exchanger for blockage. Check
Imbalance of supply and exhaust air.
balance of airflows.
Defrost damper not functioning.
Check for operation of damper actuator.
Pre-heater not functioning.
Check the operation of the electric pre-heater controls.
Enthalpy control contacts closed.
Check jumper wiring for proper operation.
Check unit circuit breaker. Check two-wire service
connector on motor.
Check capacitor connections. Check motor operation
with a new capacitor.
Check the drive motor.
Electrical supply interrupted.
Drive motor capacitor.
Enthalpy wheel not running.
Drive motor failure.
Drive motor relay in control box.
Fan motor failure.
Check relay wiring. Check relay operation.
Check for drive belt derailment off drive pulley or
failure.
Check for securely fastened pulley on motor shaft.
Check unit circuit breaker. Check four-wire service
connector on each motor.
Check capacitor connections. Check motor operation
with a new capacitor.
Check fan motor.
Fan motor contactor in control box.
Check contactor wiring. Check contactor operation.
Fan drive belt.
Check for failure. Check for proper tension.
Check for securely fastened pulley(s) on motor or fan
shaft(s). Set screw setting at 100 in-lbs to 130 in-lbs.
Wait until unit is out of defrost.
Drive belt.
Drive pulley.
Electrical supply interrupted.
Fan motor capacitor.
Motor and blower not functioning.
Fan drive pulleys.
Only supply fan will turn on.
Only exhaust fan will turn on.
Unit is in recirc defrost (recirc units).
Unit is in defrost (exhaust units).
Motor wiring incorrect.
Electrical supply interrupted.
Damper will not open.
Damper opens when it should be
closed.
VCES-ERV-IOM-4A – ERV500–3000
Check the wiring in the control box.
Defrost relay is not working.
Check connection to motor.
Check wiring on damper actuator.
Check three-wire service connector on control box.
Defrost relay in control box.
Check relay wiring. Check relay operation.
Electronic control board.
Test the defrost on control board.
Thermistor.
Test the thermistor operation.
Wires are reversed.
Reverse wires #2 and #3 on damper actuator.
61
Appendix I: Equipment Data
Table I1: Equipment Data
Airflow range
Fans
Supply type
Wheel type
ERV500i/e
400 to 600 CFM
ERV1000i
700 to 1,381 CFM
ERV1500i/e
800 to 2,000 CFM
ERV2000i/e
1,200 to 2,800 CFM
ERV3000i/e
2,000 to 4,000 CFM
Direct drive
Forward curved SWSI
Ø8.50” x 3.50”
[Ø216 x 89 mm]
Direct drive
Forward curved SWSI
Ø10.75” x 5.50”
[Ø273 x 140 mm]
Belt drive
Forward curved DWDI
Ø9.50” x 7.12”
[Ø241 x 181 mm]
Belt drive
Forward curved DWDI
Ø12.75” x 7.00”
[Ø324 x 178 mm]
Sleeve direct drive
Sleeve direct drive
Ball sealed resilient rings
Ball sealed resilient rings
Cold rolled
Cold rolled
Cold rolled
Cold rolled
½” [13 mm]
½” [13 mm]
1” [25 mm] keyed
1” [25 mm] keyed
Motor (HP)
Exhaust type
Wheel type
¼
Direct drive
Forward curved SWSI
½
Direct drive
Forward curved SWSI
½ to 1.5
Belt drive
Forward curved DWDI
½ to 3.0
Belt drive
Forward curved DWDI
Belt drive
Forward curved DWDI
Ø11.60” x 10.80”
[Ø295 x 274 mm]
Ball sealed resilient rings/
pillow block
Cold rolled
1” [25 mm] keyed
1.188” [30 mm] keyed
1.0 to 5.0
Belt drive
Forward curved DWDI
Wheel size
Ø8.50” x 3.50”
[Ø216 x 89 mm]
Ø10.75” x 5.50”
[Ø273 x 140 mm]
(In.) Ø9.50” x 7.12”
[Ø241 x 181 mm]
(In.) Ø12.75” x 9.00”
[Ø324 x 229 mm]
(In.) Ø11.60” x 10.0”
[Ø295 x 274 mm]
(Out.) Ø9.50” x 9.50“
[Ø241 x 241 mm]
(Out.) Ø12.75” x 9.00”
[Ø324 x 229 mm]
(Out.) Ø12.80” x 12.30”
[Ø325 x 312 mm]
Bearing
Sleeve direct drive
Sleeve direct drive
Ball sealed resilient rings
Ball sealed resilient rings
Housing
Cold rolled
Cold rolled
Cold rolled
Cold rolled
½” [13 mm]
½” [13 mm]
1” [25 mm] keyed
1” [25 mm] keyed
(In.) ¼
(Out.) ¾
½
½ to 1.5
½ to 3.0
Wheel size
Bearing
Housing
Shaft
Shaft
Motor (HP)
Enthalpy wheel module
Size
18” x 8” [457 x 203 mm]
22” x 22” x 10.5”
Cassette size
[559 x 559 x 267 mm]
Wheel substrate
Aluminum
Filters
(In.) 1 of 10” x 20” x 2”
[254 x 508 x 51 mm] MEF
Supply
(Out.) 10” x 20” x 1”
[254 x 508 x 25 mm] MEF
(In.) 1 of 10” x 20” x 2”
[254 x 508 x 51 mm] MEF
Exhaust
(Out.) 10” x 20” x 1”
[254 x 508 x 25 mm] MEF
Weight
Ball sealed resilient rings/
pillow block
Cold rolled
1” [25 mm] keyed
1.188” [30 mm] keyed
1.0 to 5.0
36” x 4” [914 x 102 mm] 36” x 4” [914 x 102 mm] 42” x 4” [1,067 x 102 mm] 42” x 6”[1,067 x 152 mm]
40” x 40” x 6.5”
40” x 40” x 6.5”
46” x 46” x 6.5”
46” x 46” x 8.5”
[1,016 x 1,016 x 165 mm] [1,016 x 1,016 x 165 mm] [1,168 x 1,168 x 165 mm] [1,168 x 1,168 x 216 mm]
Aluminum
Aluminum
Aluminum
Aluminum
2 of 16” x 20” x 1”
[406 x 508 x 25 mm] MEF
2 of 20” x 20” x 2”
[508 x 508 x 51 mm] MEF
2 of 24” x 24” x 2”
[610 x 610 x 51 mm] MEF
3 of 16” x 20” x 2”
[406 x 508 x 51 mm] MEF
3 of 16” x 20” x 4”
[406 x 508 x 102 mm] HEF
2 of 16” x 20” x 1”
[406 x 508 x 25 mm] MEF
2 of 20” x 20” x 2”
[508 x 508 x 51 mm] MEF
2 of 24” x 24” x 2”
[610 x 610 x 51 mm] MEF
3 of 16” x 20” x 2”
[406 x 508 x 51 mm] MEF
(In.) 700 lbs [318 kg]
1,160 lbs [527 kg]
(Out.) 850 lbs [386 kg]
(In.) 725 lbs [330 kg]
Shipping weight
320 lbs [145 kg]
525 lbs [239 kg]
600 lbs [273 kg]
1,185 lbs [539 kg]
(Out.) 870 lbs [398 kg]
(In.) 57.50” x 24.75” x 24.00”
(In.) 94.00” x 52.00” x 36.00”
Shipping
[1,461 x 629 x 610 mm] 74.00” x 44.00” x 28.00” 55.75” x 42.75” x 49.83” [2,388 x 1,321 x 914 mm] 89.00” x 49.88” x 55.50”
dimensions
(Out.) 68.00” x 27.00” x 23.00” [1,880 x 1,118 x 711 mm] [1,416 x 1,086 x 1,266 mm] (Out.) 89.00” x 49.00” x 36.00” [2,261 x 1,267 x 1,410 mm]
(L x W x H)
[1,727 x 686 x 584 mm]
[2,261 x 1,245 x 914 mm]
Exhaust damper
(In.) 8.0” x 14.0”
(In.) 8.0” x 20.0”
(In.) 14.0” x 17.5”
(In.) 12.0” x 26.0”
(In.) 14.0” x 17.5”
(H x W out. dim.)
[203 x 356 mm]
[203 x 508 mm]
[356 x 445 mm]
[305 x 660 mm]
[356 x 445 mm]
In. – Indoor unit
Out. – Outdoor unit
Net weight max.
295 lbs [134 kg]
VCES-ERV-IOM-4A – ERV500–3000
500 lbs [227 kg]
575 lbs [261 kg]
62
Appendix J: Electrical Data
Table J1: ERV500i/e Power Supply
ERV500i
ERV500e
Line voltage
120
230
MCA
9.4
11.1
MOP
10
15
Table J2: Blower Motor Full Load Amperage (FLA) – ERV1000i
HP
120/1/60
7.70
½
208/1/60
3.60
230/1/60
3.60
Voltage
208/3/60
3.00
230/3/60
3.00
460/3/6
1.50
575/3/60
N/A
230/3/60
1.83
2.70
2.90
4.14
5.66
8.12
12.80
460/3/6
0.92
1.35
1.45
2.07
2.83
4.06
6.41
575/3/60
0.80
1.20
1.20
1.80
2.30
3.10
5.20
230/3/60
2.20
460/3/6
1.10
575/3/60
0.90
The blower motor FLA values shown above are for one motor only.
Table J3: Blower Motor Full Load Amperage (FLA) – ERV1500i/e, ERV2000i/e, ERV3000i/e
HP
120/1/60
8.00
11.00
14.00
20.40
N/A
N/A
N/A
½
¾
1.0
1.5
2.0
3.0
5.0
208/1/60
4.00
5.40
6.80
10.20
14.00
17.80
22.00
230/1/60
4.00
6.00
7.00
10.20
14.00
17.00
22.00
Voltage
208/3/60
1.81
2.65
3.00
4.35
5.96
8.93
14.10
The blower motor FLA values shown above are for one motor only.
Table J4: Wheel Drive Motor and Controls Full Load Amperage (FLA)
Voltage
Amperage
120/1/60
4.20
208/1/60
2.40
230/1/60
2.20
208/3/60
2.40
Wheel drive motor is always 115V.
Table J5: Electric Pre-heat Frost Prevention Full Load Amperage (FLA)
kW
8
14
20
30
40
Voltage
208/3/60
22.20
38.90
55.60
N/A
N/A
230/3/60
20.10
35.20
50.30
N/A
N/A
460/3/60
10.10
17.60
25.10
37.70
50.30
575/3/60
8.00
14.10
20.10
30.20
40.20
Electric post-heaters range from 1 to 40 kW and actual FLA values of individual heaters will vary based upon the size, temperature rise and voltage.
Consult the factory for actual FLA values. All electric heaters require three-phase voltage.
VCES-ERV-IOM-4A – ERV500–3000
63
Minimum Current Ampacity (MCA) Calculation
Finding the Actual MOP Value
1.25 x FLA of larger hp motor or compressor
1.25 x heater FLA
=
Sum of all other motors FLA
=
Wheel drive motor and standard controls FLA =
Calculated total MCA
From the calculated MOP value, select the next smallest
value of protection from Table J6 to get the actual MOP
value (maximum value of overcurrent device).
=______
+______
+______
+______
=______
Maximum Overcurrent Protection (MOP)
Calculation
2.25 x FLA of larger hp motor or compressor
Electric heater FLA
=
Sum of all other motors FLA
=
Wheel drive motor and standard controls FLA =
Calculated total MCA
Actual MOP (from Table J6)
!
=______
+______
+______
+______
=______
=______
WARNING
All units equipped with electric post-heaters require twopoint power connections
CAUTION
All electrical installations and wiring require correct wire
gauge sizing and protection according to local building
codes.
VCES-ERV-IOM-4A – ERV500–3000
IMPORTANT
If this method leads to an actual MOP value being smaller
than the calculated total MCA, then a larger value must
rather be selected, such that the actual MOP is at least
equal to the calculated total MCA.
Table J6: Standard Overcurrent Protection
3
40
250
4
45
300
5
50
350
6
60
400
7
70
450
8
80
500
9
90
600
10
100
650
12
110
700
15
125
750
20
150
800
25
175
850
30
200
900
35
225
1,000
64
Appendix K: Enthalpy Wheel Pressure Drop
vs. Flow Formulae and Tables
Enthalpy Wheel Pressure Drop vs. Flow
Formulae
Table K1: Enthalpy Wheel Pressure Drop Coefficient
ERV Model
Flow in cfm = pressure drop measured in in. w.g. /
pressure drop coefficient based on enthalpy wheel size
ERV500i/e
Enthalpy Wheel Size
Pressure Drop
(diameter x depth in inches) Coefficient
18 x 8
0.00020554
ERV1000i
36 x 4
0.00029551
ERV1500i/e
36 x 4
0.00029551
ERV2000i/e
42 x 4
0.00021504
ERV3000i/e
42 x 6
0.00023397
Table K2: Enthalpy Wheel Flow vs. Pressure Drop
ERV500i/e
ERV1000i
ERV1500i/e
ERV2000i/e
ERV3000i/e
36 x 4” Wheel
Pressure Drop
CFM
(in. w.g.)
400
0.12
36 x 4” Wheel
Pressure Drop
CFM
(in. w.g.)
600
0.18
36 x 4” Wheel
Pressure Drop
CFM
(in. w.g.)
700
0.21
42 x 4” Wheel
Pressure Drop
CFM
(in. w.g.)
1,200
0.26
42 x 6” Wheel
Pressure Drop
CFM
(in. w.g.)
2,000
0.47
450
700
800
1,300
2,100
0.13
0.21
0.24
0.28
0.49
500
0.15
800
0.24
900
0.27
1,400
0.30
2,200
0.51
550
0.16
900
0.27
1,000
0.30
1,500
0.32
2,300
0.54
600
0.18
1,000
0.30
1,100
0.33
1,600
0.34
2,400
0.56
650
0.19
1,100
0.33
1,200
0.35
1,700
0.37
2,500
0.58
700
0.21
1,200
0.35
1,300
0.38
1,800
0.39
2,600
0.61
1,300
0.38
1,400
0.41
1,900
0.41
2,700
0.63
1,400
0.41
1,500
0.44
2,000
0.43
2,800
0.66
1,500
0.44
1,600
0.47
2,100
0.45
2,900
0.68
1,700
0.50
2,200
0.47
3,000
0.70
1,800
0.53
2,300
0.49
3,100
0.73
1,900
0.56
2,400
0.52
3,200
0.75
2,000
0.59
2,500
0.54
3,300
0.77
2,600
0.56
3,400
0.80
2,700
0.58
3,500
0.82
2,800
0.60
3,600
0.84
3,700
0.87
3,800
0.89
3,900
0.91
4,000
0.94
VCES-ERV-IOM-4A – ERV500–3000
65
Appendix L: Maintenance Summary Chart
Table L1: ERV500i/e, ERV1000i, ERV1500i/e, ERV2000i/e and ERV3000i/e Maintenance Summary Chart
Item
No. Description
1
2
General
Air Filters
Forward
Curved Fans
Dampers
Coils
(ERV3000 if
supplied)
Electrical
Notes
Monthly Quarterly
SemiAnnually
annually
24
25
26
27
28
29
30
31
32
33
Inspect the general condition of the unit.
Remove any dirt or debris.
Check interior liners and partition for dirt buildup and
clean.
Check for unusual noise or vibration.
Replace prefilter.
Replace final filters.
Inspect holding frames/sliding track.
Check sheave set screw tightness.
Check fan and motor mounting bolt tightness.
Check sheave and fan belt condition and alignment.
Adjust belt tension.
Lubricate fan bearings (ERV3000 with grease fittings).
Lubricate motor base adjusting screws.
Check condition of flexible connection (ERV3000).
Check for dirt buildup and clean.
Check motor voltage and current.
Verify wheel is rotating freely.
Check motor mounting bolts and drive sheave set screw
for tightness.
Check condition and tension of drive belt.
Check condition of brush seals.
Check for dirt buildup and clean.
Check condition of media, rim and spokes.
Check damper actuator mounting and linkage fasteners
for tightness.
Inspect for dirt or leakage.
Clean the coils.
Clean the drain pan.
Winterize water coils.
Clean the drain trap.
Check fluid level in drain trap.
Verify all electrical connections; tighten if necessary.
Verify all fuse holders.
Verify all motor overload settings.
Verify system operation in all control modes.
1
2
3
4
5
6
Check filters weekly after initial start-up until construction dust has been cleared and to gauge required interval.
Check set screw at start-up, after 24 hours, monthly for initial three months, then quarterly.
Check mounting bolts at start-up, after 24 hours, then quarterly.
Check and adjust belt tension at start-up, daily for the first week until they acquire their permanent set, then monthly.
On ERV3000 grease fittings.
Check and adjust belt tension at start-up, after 24 hours of operation until they acquire their permanent set, then quarterly.
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Enthalpy
Wheel
Note
19
20
21
22
23
VCES-ERV-IOM-4A – ERV500–3000
x
x
x
x
1
x
x
x
x
x
2
3
4
5
x
x
x
x
x
x
x
2
x
6
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
66
Appendix M: ERV500–3000 Start-up Form and Checklist
•
•
•
•
•
IMPORTANT
Complete this form for each unit and email, fax or mail to Venmar CES immediately after start-up to validate warranty
and to provide valuable information for personnel performing future maintenance or for factory assistance to address
below.
Read the Installation, Operation and Maintenance Instructions Manual before proceeding.
Leave a copy of this report with the owner and at the unit for future reference and permanent record.
To ensure proper operation of each unit qualified personnel should perform the start-up, complete the checklist and
report.
All units are factory run tested. Blowers and heat wheel are set up to run correct when power is connected. If any
blower is running backwards disconnect power and switch two leads (on three-phase power) to ensure proper rotation
and avoid damage.
Venmar CES Inc.
Unit Identification Information
1502 D Quebec Avenue
Saskatoon, Saskatchewan
Canada S7K 1V7
Phone: 1-866-4-VENMAR (1-866-483-6627)
Fax: (306) 651-6009
Project:___________________________________________
Model Number:____________________________________
Serial Number:_____________________________________
Tag:______________________________________________
Jobsite Contact:____________________________________
Job Name:________________________________________
Job Address:_______________________________________
Telephone:________________________________________
Email:_ ___________________________________________
Table M1: Pre Start-up Checklist
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
Checklist Item
Is the electrical disconnect set to the ‘Off’ position?
Have shipped loose parts, obstructive packaging, objects, tie downs on fans and heat wheel been removed? On
ERV2000i/e have additional shipping brackets been removed from the enthalpy wheel?
Are fans and enthalpy wheel rotating freely?
Are fan wheels and drive set screws tight?
Are belt alignment and tension correct?
Are air filters installed, clean or replaced? If filters are equipped with optional differential pressure switch, check
desired setpoint does not exceed factory setting of 0.8” w.c. [200 Pa].
Have coils been checked for fin damage and dirt, straightened and cleaned?
Are damper and linkages free of movement?
Is ductwork connected and complete?
Are condensate drain connections trapped, installed correctly and filled?
Are all shipped loose or field supplied components correctly installed and wired?
Has power supply and control wiring been inspected and approved by the Local Authorities?
Have factory and field wiring connections been checked and tightened?
Are all fuses properly installed in holders?
Is voltage at the disconnect switch within 10% of nameplate and phase-to-phase readings within 2% of nameplate?
Are field piping and venting installation and connections for heating and cooling options completed and tested?
Have all thermostat setpoints been checked and adjusted?
VCES-ERV-IOM-4A – ERV500–3000
Yes
N/A
67
Serial Number:______________________________________
Table M2: Start-up Checklist
Checklist Item
1
2
Yes
N/A
Before proceeding, complete the pre start-up checklist.
For the unit to start when the disconnect switch is turned on a ventilation and fan speed call is required.
a.Is a ventilation call available from the remove wall control connection, occupied timer/sensor connection
or BMS, whichever is used? See Appendix F for which terminal connections should be closed (contacts
made) once power is connected. Circle which device is used.
b.Is either a low speed or high speed (if equipped) call available from the remote fan control, CO2 ventilation control or BMS, whichever is used? See Appendix F for which terminal connections should be closed
(contacts made) once power is connected.
c.If ‘a’ and ‘b’ are not connected, start can be accomplished by using temporary external dry contacts or a
jumper wire closing timer contacts 3 and 4 plus low speed contacts 13 and 14 or high speed contacts 14
and 15. Are temporary dry contacts or a jumper wire used for start?
!
WARNING
Only low or high speed contacts must be closed at any one time using dry contacts/jumper wires not both otherwise permanent
damage to the motor and wiring will occur.
Remote controls if installed and connected operate in conjunction with the dry contacts/jumper wires. When controlling units with
remote controls, use extreme caution around moving mechanical components such as fans, belts and motors as they can lead to
severe personal injury.
3
Close all access panels or doors.
Turn the unit disconnect switch to the ‘On’ position.
IMPORTANT
4
On initial power up, the unit will perform a system check and operate at high speed for five seconds.
5
6
7
8
9
10
11
12
Wait for blowers to run and then shut off units disconnect switch. Are the blowers and enthalpy wheel rotating in the correct direction? To reverse fan rotation, interchange two wires on load side of three-phase power
supply.
Are dampers operating properly?
Close all access doors and turn the unit’s disconnect to the ‘On’ position.
Re-check the voltage at the disconnect switch against the nameplate and against phase-to-phase readings
on three-phase with all blowers operating. If the voltage is not within 10% of rated or 2% of phase-tophase have the condition corrected before continuing start-up.
Check amperage draw to each motor on each phase against motor nameplate FLA. Do not allow the motor’s amp draw to exceed the motor Manufacturer’s nameplate data. Excessive amp draw will cause premature failure of the motor and void the motor warranty. If significantly different check ductwork static and/or
take corrective action.
Check the operation of the control options and accessories provided with the unit. See Frost Control, Sequence of Operation and Appendix F for functional descriptions and further details.
Check the setpoints on thermostats and controls; adjust and record changes as required.
When unit has achieved steady state take measurements and complete readings section of start-up form for
each operating cycle to verify all components are functioning properly.
VCES-ERV-IOM-4A – ERV500–3000
68
Start-up Readings
•
•
Serial Number:______________________________________
Allow unit to reach steady state before taking readings.
Complete based on options included with the unit.
Table M3: Start-up Readings
Mode of Operation
Nameplate voltage
L1–L2
Power supply Voltage at
disconnect no
L2–L3
motors
L1–L3
Voltage at full load L1/L2/L3
Full load amps
Amp draw L1/L2/L3
Supply fan
Overload amp setting
RPM
Hertz
Power supply
Full load amps
with all loads
Amp draw L1/L2/L3
connected
Exhaust fan
Overload amp setting
RPM
Hertz
Full load amps
Enthalpy wheel
Amp draw L1/L2/L3
Overload amp setting
Supply
Airflow CFM
Exhaust
Outdoor entering
Supply enthalpy wheel entering
Supply enthalpy wheel leaving
Temperature °F
Cooling coil leaving
db/wb
Heating coil leaving
Return entering
Exhaust enthalpy wheel leaving
Airside
Outdoor duct
Supply enthalpy wheel entering
Supply enthalpy wheel leaving
Supply fan entering
Static pressure
Supply duct
inches w.c.
Return duct
Exhaust enthalpy wheel entering
Exhaust enthalpy wheel leaving
Exhaust duct
Stage
1
Amp draw – L1
Electric
heating
Amp draw – L2
Amp draw – L3
VCES-ERV-IOM-4A – ERV500–3000
2
Heating
Cooling
3
4
69
Serial Number:______________________________________
This unit has been checked out and started according with
the above procedures and completed forms and is operating satisfactorily.
After 24 hours of satisfactory operation, shut down the
unit and check all foundation bolts, shaft bearings, drive
set screws and terminals. Tighten where required.
Additional Comments:
_________________________________________________
Start-up
By________________________________________________
Date______________________________________________
Email_____________________________________________
Company Name____________________________________
Telephone_________________________________________
Email to Tech Support ([email protected]) or
fax to 306-244-4221.
_________________________________________________
VCES-ERV-IOM-4A – ERV500–3000
70
Appendix N: Effect of Undersized Straight Duct and Elbows on
Forward Curved Fans
A
5.00
B
C
D
E
FGHI J K L
M
N O
P
4.00
Q
Position C
3.00
R
Position D
Position B
e
tiv
ec th
eff leng
% ct
du
Inlet
Position A
Figure N1: Fan inlet and outlet duct elbow positions
T
1.00
U
0.90
0.80
0.70
0.60
V
0.50
0.40
W
0.30
0.25
X
No system effect
factor
Outlet
No
12%
25%
50%
100%
Elbow Outlet Outlet Outlet Outlet Outlet
Position Duct
Duct
Duct
Duct
Duct
A
R–S
S
T
V
B
S–T
T
Y
W
C
R–S
S
T
V
D
R–S
S
T
V
A
Q
Q–R
R–S
U
B
P
Q
R
T
C
N–O
Q–P
P–Q
S
D
O
P
Q–R
S–T
Notes:
1. For double width double inlet (DWDI) fans use the
same system effect factor curve for SWSI fans.
VCES-ERV-IOM-4A – ERV500–3000
0.10
5
6
7
8
9 10
15
20
25
30
40
50
60
Air Velocity, FPM in Hundreds
Air Density = 0.075 lb per cu. ft.
Table N1: System Effect Factor Curves for SWSI Fans
ERV1000
ERV1500
ERV2000
ERV3000
S
1.50
0.15
1. Single width single inlet (SWSI) fans shown.
2. Fan inlet and elbow positions (rotation) must be oriented as shown for proper application of the systems
effect factor.
ERV500
2.00
0.20
Notes:
Model
System Effect Factor – Pressure, Inches w.g.
2.50
Figure N2: System effect factor – pressure drop curves for
SWSI fans
Notes:
1. For double width double inlet fans use the same system effect factor – pressure drop curve as for SWSI
fans but if elbows are installed within the 100% effective duct length multiply the pressure drop value
by the following multiplier based on elbow position
from Table N1.
a. Elbow position B = pressure drop * 1.25
b. Elbow position D = pressure drop * 0.85
c. Elbow position A and C = pressure drop * 1.00
71
[email protected]
www.venmarces.com
Venmar CES Inc. has a policy of continuous improvement and reserves
the right to change design and specifications without notice.
©2013 Venmar CES Inc.
VCES-ERV-IOM-4A (PN 500058422)
February 2014

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