Wiring Diagrams

Transcription

Wiring Diagrams
42BH,BV,CA,CE,CF,CG,CK,DA,DC,DD,
DE,DF,SG,SH,SJ,VA,VB,VC,VE,VF,VG
Fan Coil Air Conditioners
Wiring Diagrams
INDEX
SYSTEM TYPE
THERMOSTAT
Transformer and Non-Carrier Relay Board (24-v) (Special Request)
----------
Field-Supplied/Installed Controls (Line Voltage and Control Valves)
----------
UNITS
DIAGRAM
NUMBER
FIGURE
NUMBER
2-Pipe Cooling Only
Unit-Mounted Debonair® Thermostat (24-v) and Duct Sensor
Unit-Mounted Thermostat (Line Voltage)
Remote/Wall-Mounted Debonair Thermostat (24-v)
Remote/Wall-Mounted Thermostat (Line Voltage)
42C,S,V (except VG), and 42D
1000-90000522
(600-1000 cfm)
42C,S,V and 42D
1000-90000493
(600-1000 cfm)
42D (1200-2000)
1000-90000514
33CSSN2-FC
42SG,SH,SJ,VA,VB,VF
1000-00007884
33CSSP2-FC*
C17
42SG,SH,SJ,VA,VB,VC,VE,VF 1000-90000530
42C,S,V (except VG), and 42D
71360601
33CSSN2-FC
(600-1000 cfm)
33CSSP2-FC*
42D (1200-2000)
1000-00005664
42C,S,V and 42D
71171701
TB155-026
(600-1000 cfm)
(702893-36)
42D (1200-2000)
71171704
1
2
3
4
5
6
7
8
9
2-Pipe Heating Only
Transformer and Non-Carrier Relay Board (24-v) (Special Request)
----------
Field-Supplied/Installed Controls (Line Voltage and Control Valves)
----------
Unit-Mounted Debonair Thermostat (24-v) and Duct Sensor
Unit-Mounted Thermostat (Line Voltage)
Remote/Wall-Mounted Debonair Thermostat (24-v)
Remote/Wall-Mounted Thermostat (Line Voltage)
42C,S,V (except VG), and 42D 1000-90000522
(600-1000 cfm)
42C,S,V and 42D
1000-90000493
(600-1000 cfm)
42D (1200-2000)
1000-90000514
33CSSN2-FC
42SG,SH,SJ,VA,VB,VF
71359301
33CSSP2-FC*
C17
42SG,SH,SJ,VA,VB,VC,VE,VF 1000-90000530
42C,S,V (except VG), and 42D
71360501
33CSSN2-FC
(600-1000 cfm)
33CSSP2-FC*
42D (1200-2000)
1000-00005664
42C,S,V and 42D
71171801
TB155-026
(600-1000 cfm)
(702893-36)
42D (1200-2000)
71171704
10
11
12
13
14
15
16
17
18
2-Pipe Heating and Cooling with Automatic Changeover
Transformer, Non-Carrier Relay Board (24-v) (Special Request)
----------
Field-Supplied/Installed Controls (Line Voltage and Control Valves)
----------
Unit-Mounted Debonair Thermostat (24-v), Duct Sensor
Unit-Mounted Thermostat (Line Voltage)
Remote/Wall-Mounted Debonair Thermostat (24-v)
Remote/Wall-Mounted Thermostat (Line Voltage)
42C,S,V (except VG), and 42D
1000-90000519
(600-1000 cfm)
42C,S,V and 42D
1000-90000507
(600-1000 cfm)
42D (1200-2000)
1000-90000511
33CSSN2-FC
42SG,SH,SJ,VA,VB,VF
33CSSP2-FC*
C17
42SG,SH,SJ,VA,VB,VC,VE,VF
42C,S,V (except VG), and 42D
33CSSN2-FC
(600-1000 cfm)
33CSSP2-FC*
42D (1200-2000)
42C,S,V and 42D
TB155-026
(600-1000 cfm)
(702893-36)
42D (1200-2000)
19
20
21
1000-00007360
22
1000-90000527
23
1000-00005377
24
1000-00012276
25
71171501
26
71171503
27
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-56420002-01
Printed in U.S.A.
Form 42-3W
Pg 1
10-08
Replaces: 42-2W
INDEX (cont)
SYSTEM TYPE
THERMOSTAT
UNITS
DIAGRAM
NUMBER
FIGURE
NUMBER
2-Pipe Heating and Cooling with Auxiliary Heat
Transformer and Non-Carrier Relay Board (24-v) (Special Request)
----------
Field-Supplied/Installed Controls (Line Voltage and Control Valves or
Electric Heat)
----------
Unit-Mounted Thermostat (Line Voltage)
Unit-Mounted Debonair® Thermostat (24-v), Duct Sensor and Dual
Power Source
Unit-Mounted Thermostat (Line Voltage) and Dual Power Source
Remote/Wall-Mounted Debonair Thermostat (24-v)
Remote/Wall-Mounted Debonair Thermostat (24-v) and Dual Power
Source
Remote/Wall-Mounted Thermostat (Line Voltage) and Dual Power
Source
42C,S,V (except VG), and 42D 1000-90000520
(600-1000 cfm)
42C,S,V (except VG), and 42D
1000-90000508
(600-1000 cfm)
42D (1200-2000)
1000-90000512
C17
42SG,SH,SJ,VA,VB,VC,VE,VF 1000-90000528
33CSSN2-FC 42SG,SH,SJ,VA,VB,VC,VE,VF
71359601
33CSSP2-FC*
C17
42SG,SH,SJ,VA,VB,VC,VE,VF
70391617
42C,S,V (except VG), and 42D
1000-00006449
33CSSN2-FC
(600-1000 cfm)
33CSSP2-FC*
42D (1200-2000)
1000-00046974
42C,S,V (except VG), and 42D
71360801
33CSSN2-FC
(600-1000 cfm)
33CSSP2-FC*
42D (1200-2000)
71360803
42C,S,V (except VG), and 42D
71171301
TB155-026
(600-1000 cfm)
(702893-36)
42D (1200-2000)
71171313
28
29
30
31
32
33
34
35
36
37
38
39
2-Pipe Cooling with Total Electric Heat
Transformer and Non-Carrier Relay Board (24-v) (Special Request)
----------
Field-Supplied/Installed Controls (Line Voltage and Control Valves or
Electric Heat)
----------
Unit-Mounted Debonair Thermostat (24-v) and Duct Sensor
Unit-Mounted Thermostat (Line Voltage)
Unit-Mounted Debonair Thermostat (24-v), Duct Sensor and Dual
Power Source
Unit-Mounted Thermostat (Line Voltage) and Dual Power Source
Remote/Wall-Mounted Debonair Thermostat (24-v)
Remote/Wall-Mounted Thermostat (Line Voltage)
Remote/Wall-Mounted Debonair Thermostat (24-v) and Dual Power
Source
Remote/Wall-Mounted Thermostat (Line Voltage) and Dual Power
Source
33CSSN2-FC
33CSSP2-FC*
C17
33CSSN2-FC
33CSSP2-FC*
C17
33CSSN2-FC
33CSSP2-FC*
TB155-026
(702893-36)
42C,S,V (except VG), and 42D
1000-90000523
(600-1000 cfm)
42C,S,V (except VG), and 42D
1000-90000490
(600-1000 cfm)
42D (1200-2000)
1000-90000515
42
42SG,SH,SJ,VA,VB,VC,VE,VF 1000-00017766
43
42SG,SH,SJ,VA,VB,VC,VE,VF 1000-90000531
44
42SG,SH,SJ,VA,VB,VC,VE,VF
45
71359701
40
41
42SG,SH,SJ,VA,VB,VC,VE,VF
70390705
46
42D (1200-2000)
1000-00005329
47
71171106
48
71360901
49
42C,S,V (except VG), and 42D
(600-1000 cfm)
42C,S,V (except VG), and 42D
33CSSN2-FC
(600-1000 cfm)
33CSSP2-FC*
42D (1200-2000)
42C,S,V (except VG), and 42D
TB155-026
(600-1000 cfm)
(702893-36)
42D (1200-2000)
71360903
50
71171101
51
71171114
52
4-Pipe Heating and Cooling
Transformer and Non-Carrier Relay Board (24-v) (Special Request)
----------
Field-Supplied/Installed Controls (Line Voltage and Control Valves)
----------
Unit-Mounted Debonair Thermostat (24-v) and Duct Sensor
Unit-Mounted Thermostat (Line Voltage)
Remote/Wall-Mounted Debonair Thermostat (24-v)
Remote/Wall-Mounted Thermostat (Line Voltage)
42C,S,V (except VG), and 42D
1000-90000526
(600-1000 cfm)
42C,S,V (except VG), and 42D
1000-90000510
(600-1000 cfm)
42D (1200-2000)
1000-90000518
33CSSN2-FC 42SG,SH,SJ,VA,VB,VC,VE,VF 1000-00005390
33CSSP2-FC*
C17
42SG,SH,SJ,VA,VB,VC,VE,VF 1000-90000534
42C,S,V (except VG), and 42D
71361001
33CSSN2-FC
(600-1000 cfm)
33CSSP2-FC*
42D (1200-2000)
1000-00010427
42C,S,V (except VG), and 42D
71170901
TB155-026
(600-1000 cfm)
(702893-36)
42D (1200-2000)
71170903
2
53
54
55
56
57
58
59
60
61
INDEX (cont)
SYSTEM TYPE
THERMOSTAT
UNITS
DIAGRAM
NUMBER
FIGURE
NUMBER
No Controls
Unit-Mounted 3-Speed Switch Only
----------
Wall-Mounted 3-Speed Switch Only
----------
Single-Phase Unit
----------
42B
1000-90000732
65
----------
42B
1000-90000734
66
-------------------------------------
42B
42B
42B
42B
1000-90000748
1000-90000749
1000-90000735
1000-90000736
67
68
69
70
----------
42B
1000-90000737
71
----------------------------
42B
42B
42B
1000-90000742
1000-90000745
1000-90000747
72
73
74
T-170
T-170
T-170
42B
42B
42B
1000-00032864
1000-00032864
1000-00032864
75
76
77
-------------------
—
—
85757501
85757502
78
79
3-Phase Unit
Motor Controls
Single-Phase Only
3-Phase Only
Single-Phase with Interlocking Disconnect
3-Phase with Interlocking Disconnect
Single-Phase with Interlocking Disconnect and 1-Stage Electric
Heater
3-Phase with Interlocking Disconnect and 1-Stage Electric Heater
3-Phase with Interlocking Disconnect and 2-Stage Electric Heater
3-Phase with Interlocking Disconnect and 3-Stage Electric Heater
Sunne T-170 Thermostat
2-Pipe Cool/Heat
2-Pipe Cooling With Electric Heat
4-Pipe Cooling and Heating
Master/Slave Wiring Diagram (Special Request)
Master Control Option
Slave Control Option
42SG,SH,SJ,VA,VB,VC,VE,VF 1000-90000503
42C,S,V and 42D
70338901
(600-1000 cfm)
42D (1200-2000)
70338903
62
63
64
*The wiring diagrams for the 33CSSP2-FC and 33CSSN2-FC
thermostats are the same; however, the 33CSSP2-FC thermostat is
programmable while the 33CSSN2-FC thermostat is nonprogrammable.
LEGEND (Fig. 1-79)
AWG
COM
ELEC
FLA
GND
LRA
MTR
NC
NEC
NO
—
—
—
—
—
—
—
—
—
—
American Wire Gage
Common
Electric
Full Load Amps
Ground
Locked Rotor Amps
Motor
Normally Closed
National Electrical Code
Normally Open
Q/C
RES
SW
TSTAT
W/O
XFMR
XFORMER
—
—
—
—
—
—
—
Quick Connect
Resistance
Switch
Thermostat
Without
Transformer
Transformer
Terminal (Unmarked)
Terminal Block
*Use WHT for 120/277 v. Use BLK for 208/240 v.
NOTES:
1. Disconnect power before servicing.
2. See nameplate for correct voltage. Use 75 C minimum copper
conductors only. Unit terminals are not designed to accept any
other wiring.
3. Motor(s) is thermally protected. Units with 2 motors are wired
parallel.
4. Provide disconnect means and overcurrent protection as
required.
5. Motor shown for 120/277 v operation, for 208/240 v motor
common is ORG or YEL.
Splice
Factory Wiring
Field Wiring
Optional Wiring
Stripped Wire Lead
Wire Connection
Wire Capped
6. Valve optional, factory-supplied or field-supplied with NEC
class 1 wiring. Do not exceed thermostat rating.
7. To ensure proper fan interlock and sequencing, external controller must energize heater stages in numerical order shown
and deenergize stages in reverse order (first on, last off).
8. All contractor wiring must conform to national and local electrical codes.
9. Optional valve can be factory or field supplied.
3
In winter, the system is switched over to hot water and requires 2 auto changeover devices (aquastats). One device controls the switching of the thermostat, the other device locks out
the electric heater when hot water is in the coil.
With this system, the fan runs continuously unless manually
switched to the OFF position. Fan must be on before thermostat can send signal to open chilled water valve or turn on electric heater.
Two control methods are available:
1. Use of a standard automatic changeover thermostat
with a deadband between heating and cooling.
2. Use of a manual changeover thermostat. Only one
changeover is required with this method.
A 2-way or 3-way electric valve must be included with this
system.
OPERATION
Manual Fan Control — The standard fan-speed switch
is furnished unit-mounted and wired on all vertical cabinet
units. On all vertical furred-in units and all horizontal units, the
switch is shipped separately on a decorative wall plate for field
mounting and wiring.
The standard switch has LOW, MEDIUM, HIGH and OFF
positions plus an auxiliary contact to energize thermostats,
valves, dampers, etc.
Thermostatic Fan Control, 2-Pipe Systems —
The thermostat cycles the fan on and off from any selected
speed setting to maintain selected room temperature. Controls
can be wired for heating-only, cooling-only or for heating/
cooling with the addition of an automatic changeover device
that senses water temperature and changes the action of the
thermostat as required.
Thermostat 2-Pipe Total Electric Heat with
Valve Control — With this system, the complete heating
Thermostatic Fan Control, 2-Pipe Systems
with Safety Cycle — This control is used for high
requirement for the space is provided by the electric heater; the
water system is never changed over for heating. It is therefore
possible, just as with 4-pipe systems, to have heating or cooling
at any time of the year.
The fan runs continuously unless it is manually switched to
the OFF position. Fan must be on before thermostat can send
signal to open chilled water valve or turn on electric heater.
Normally, an automatic changeover thermostat with a
deadband between heating and cooling is used, but a manual
changeover thermostat is also suitable. A 2-way or 3-way valve
must also be used so that the chilled water is off whenever the
heater is on. No changeover device to sense water temperature
is necessary.
humidity situations in which condensate problems can occur if
fan is turned off while chilled water is still running through the
coil.
The wiring provides fan cycling from HIGH to LOW on the
cooling cycle and from LOW to OFF on the heating cycle. An
ON-OFF toggle switch replaces the standard 3-speed fan
switch. The toggle switch can be concealed to ensure that the
unit runs on low speed when cooling. This action greatly
reduces the chance of condensation problems that exist with
other standard fan cycling controls.
Thermostatic Electric Valve Control, 2-Pipe —
A thermostatically controlled 2-position valve provides
superior control to fan cycling. With this control, the fan runs
continuously unless it is manually switched to the OFF
position. The fan must be on before the valve can be opened to
supply water to the coil.
This system can be used for normal 2-pipe changeover
systems and can also be furnished for cooling-only or heatingonly applications by omitting the changeover and specifying
which application is intended.
Thermostatic Valve Control, 4-Pipe — The 4-pipe
system provides the ultimate in economy and room temperature control. Both hot water and chilled water are available at
any time.
Normally an automatic changeover thermostat is used, but a
manual changeover thermostat is also suitable. Two 2-way
valves, two 3-way valves, or one 2-way plus one 3-way valve
must be selected. An automatic changeover device to sense
water temperature is not required.
With this system, the fan runs continuously unless it is
manually switched to the OFF position. The fan must be on
before thermostat can send a signal to open the chilled water or
hot water valve.
Thermostatic 2-Pipe Auxiliary Electric Heat
with Valve Control — This system, also called Twilight
or Intermediate Season electric heat, goes a long way towards
solving the spring and fall control problems of 2-pipe systems.
Chilled water can be available late into the fall. It may also
be turned on early in the spring and still provide heat to all units
when required.
4
a42-4050
NEC CLASS 2 WIRING
Fig. 1 — 42C,S, V (except VG), and 42D (600-1000 cfm) 2-Pipe Cooling Only — Transformer and Non-Carrier
Relay Board (24-v) (Special Request)
Δ120-V WHT ALL OTHERS BLK
a42-4051
NEC CLASS 1 WIRING
Fig. 2 — 42C,S,V and 42D (600-1000 cfm) 2-Pipe Cooling Only — Field-Supplied/Installed Controls
(Line Voltage and Control Valves)
5
a42-4052
Δ120-V WHT ALL OTHERS BLK
NEC CLASS 1 WIRING
Fig. 3 — 42D (1200-2000) 2-Pipe Cooling Only — Field-Supplied/Installed Controls
(Line Voltage and Control Valves)
a42-4053
Fig. 4 — 42SG,SH,SJ,VA,VB,VF 2-Pipe Cooling Only —
Unit-Mounted Debonair® Thermostat (24-v) and Duct Sensor
6
Δ120-V WHT ALL OTHERS BLK
a42-4054
NEC CLASS 1 WIRING
Fig. 5 — 42SG,SH,SJ,VA,VB,VC,VE,VF 2-Pipe Cooling Only — Unit-Mounted Thermostat (Line Voltage)
TRANSFORMER
Fig. 6 — 42C,S,V (except VG), and 42D (600-1000 cfm) 2-Pipe Cooling Only —
Remote/Wall-Mounted Debonair® Thermostat (24-v)
7
a42-4055
Fig. 7 — 42D (1200-2000) 2-Pipe Cooling Only — Remote/Wall-Mounted Debonair® Thermostat (24-v)
THERMOSTAT PART # 702893-36
PUR
ORG
REMOTE DEVICE BOX
COOL BLU
HEAT RED
L1 BLK
L2 OR N YEL
HI W/ORG
MED W/RED
LOW W/BRN
UNIT MOUNTED
J BOX
NEC CLASS 1 WIRING
PUR
VALVE
QUICK CONNECT
OPTIONAL
L RED
BLOWER
MOTOR
M BLU
H BLK
WHT
COM
2
4
3
2
1
*WHT
RED
1
BLK
WHT
COOL
BLU
BLK
*WHT
*WHT
WHT FOR 120V
L2 or N
ALL OTHERS BLK
L1
EQUIPMENT
GROUND
Fig. 8 — 42C,S,V and 42D (600-1000 cfm) 2-Pipe Cooling Only — Remote/Wall-Mounted Thermostat
(Line Voltage)
8
THERMOSTAT PART # 702893-36
PUR
ORG
REMOTE DEVICE BOX
COOL BLU
HEAT RED
L1 BLK
L2 OR N YEL
HI W/ORG
MED W/RED
LOW W/BRN
NEC CLASS I WIRING
BLK
RED
BLU
UNIT MOUNTED
J BOX
BLK
B
NC
1
7
*WHT
0
3
*WHT
1
BLK
WHT
COOL
0
B
NC
7
1
2
4
3
0
*WHT
3
6
8
BLU
BLK
120V WHT ALL OTHERS BLK
B
NC
BLK
1
7
6
8
EQUIPMENT
GROUND
NO
*WHT
COM
1
NO
2
COM
WHT
COM
RED
2
H BLK
3
VALVE
2
BLK
*WHT
4
MOTOR
4
6
BLOWER
M BLU
1
8
WHT
COM
L RED
2
BLU
NO
H BLK
3
COM
MOTOR
M BLU
RED
2
BLOWER
4
4
L RED
VIO
*WHT
QUICK CONNECT
*WHT
L2 or N
L1
Fig. 9 — 42D (1200-2000) 2-Pipe Cooling Only — Remote/Wall-Mounted Thermostat (Line Voltage)
NEC CLASS 2 WIRING
a42-4050
Fig. 10 — 42C,S,V (except VG), and 42D (600-1000 cfm) 2-Pipe Heating Only —
Transformer and Non-Carrier Relay Board (24-v) (Special Request)
9
a42-4051
NEC CLASS 1 WIRING
Fig. 11 — 42C,S,V and 42D (600-1000 cfm) 2-Pipe Heating Only — Field-Supplied/Installed Controls
(Line Voltage and Control Valves)
a42-4052
Δ120-V WHT ALL OTHERS BLK
NEC CLASS 1 WIRING
Fig. 12 — 42D (1200-2000) 2-Pipe Heating Only — Field-Supplied/Installed Controls
(Line Voltage and Control Valves)
10
THERMOSTAT #33CSSN2-FC
R
G
RED
DUCT SENSOR 33CSSEN-DS
RS
ORG
RS+5
Y1
G3
W1 G2
C H2O CK1
RED
WHT
YEL
BLU
BRN
BLK
BLK
VALVE
BLK
BLK
2
Q/C
1
YEL
33ZCRLYBRD
ORG
YEL
G
G2/(W)
G3/(Y)
COM
QUICK CONNECT
FAN
BLK
(VALVE)
(COOL)
HI
YEL
(HEAT)
YEL
24
MED
RED
BLU
BLK
RED L
4
BLU M
3
BLOWER
BLK H
2
1
MOTOR
WHT COM
TRANSFORMER
LOW
EQUIPMENT
GROUND
BLK
BLK
L1
*WHT
L2 or N
*WHT
Fig. 13 — 42SG,SH,SJ,VA,VB,VF 2-Pipe Heating Only —
Unit-Mounted Debonair® Thermostat (24-v) and Duct Sensor
Δ120-V WHT ALL OTHERS BLK
NEC CLASS 1 WIRING
a42-4054
Fig. 14 — 42SG,SH,SJ,VA,VB,VC,VE,VF 2-Pipe Heating Only — Unit-Mounted Thermostat (Line Voltage)
11
THERMOSTAT #33CSSN2-FC
REMOTE DEVICE BOX
RS+5
RS
R
G
Y1
G3
W1 G2
C H2O CK1
NEC CLASS 2 WIRING
YEL
BLU
BRN
BLK
RED
ORG
VALVE
BLK
HEAT
BLK
2
Q/C
1
YEL
33ZCRLYBRD
YEL
G
G2/(W)
G3/(Y)
COM
QUICK CONNECT
FAN BLK
(VALVE)
RED
4
BLU
HI
ORG
YEL
24
BLU M
3
(COOL)
(HEAT)
RED L
MED
BLK
*WHT
2
1
BLOWER
BLK H
MOTOR
WHT COM
TRANSFORMER
EQUIPMENT
GROUND
L1
L2 or N
LOW
BLK
BLK
*WHT
BLK
*WHT
Fig. 15 — 42C,S,V (except VG), and 42D (600-1000 cfm) 2-Pipe Heating Only —
Remote/Wall-Mounted Debonair® Thermostat (24-v)
a42-4055
NEC CLASS 2 WIRING
Fig. 16 — 42D (1200-2000) 2-Pipe Heating Only — Remote/Wall-Mounted Debonair Thermostat (24-v)
12
ONLY 120V WHT/ALL
OTHERS BLK
Fig. 17 — 42C,S,V and 42D (600-100 cfm) 2-Pipe Heating Only — Remote/Wall-Mounted Thermostat
(Line Voltage)
THERMOSTAT PART # 702893-36
PUR
ORG
REMOTE DEVICE BOX
COOL BLU
HEAT RED
L1 BLK
L2 OR N YEL
HI W/ORG
MED W/RED
LOW W/BRN
NEC CLASS I WIRING
BLK
BLU
RED
UNIT MOUNTED
J BOX
BLK
B
NC
1
7
*WHT
0
3
2
*WHT
1
WHT
COOL
B
NC
7
1
2
4
3
0
*WHT
0
3
6
8
BLU
BLK
120V WHT ALL OTHERS BLK
B
NC
BLK
1
7
6
8
EQUIPMENT
GROUND
NO
*WHT
COM
1
NO
2
RED
COM
WHT
COM
*WHT
2
H BLK
3
VALVE
BLK
BLK
4
MOTOR
M BLU
4
6
BLOWER
1
8
WHT
COM
L RED
2
BLU
NO
H BLK
3
COM
MOTOR
M BLU
RED
2
BLOWER
4
4
L RED
VIO
*WHT
QUICK CONNECT
*WHT
L2 or N
L1
Fig. 18 — 42D (1200-2000) 2-Pipe Heating Only — Remote/Wall-Mounted Thermostat (Line Voltage)
13
a42-4056
NEC CLASS 2 WIRING
Fig. 19 — 42C,S,V (except VG), and 42D (600-1000 cfm) 2-Pipe Heating and Cooling with
Automatic Changeover — Transformer, Non-Carrier Relay Board (24-v) (Special Request)
Δ120-V WHT ALL OTHERS BLK
a42-4057
NEC CLASS 1 WIRING
Fig. 20 — 42C,S,V and 42D (600-1000) 2-Pipe Heating and Cooling with Automatic Changeover —
Field-Supplied/Installed Controls (Line Voltage and Control Valves)
14
a42-4058
Δ120-V WHT ALL OTHERS BLK
NEC CLASS 1 WIRING
Fig. 21 — 42D (1200-2000) 2-Pipe Heating and Cooling with Automatic Changeover —
Field-Supplied/Installed Controls (Line Voltage and Control Valves)
a42-4059
Fig. 22 — 42SG,SH,SJ,VA,VB,VF 2-Pipe Heating and Cooling with Automatic Changeover —
Unit-Mounted Debonair® Thermostat (24-v), Duct Sensor
15
Δ120-V WHT ALL OTHERS BLK
NEC CLASS 1 WIRING
a42-4060
Fig. 23 — 42SG,SH,SJ,VA,VB,VC,VE,VF 2-Pipe Heating and Cooling with
Automatic Changeover — Unit-Mounted Thermostat (Line Voltage)
a42-4061
NEC CLASS 2 WIRING
Fig. 24 — 42C,S,V (except VG), and 42D (600-1000 cfm) 2-Pipe Heating and Cooling with
Automatic Changeover — Remote/Wall-Mounted Debonair® Thermostat (24-v)
16
NEC CLASS 2 WIRING
a42-4062
Fig. 25 — 42D (1200-2000) 2-Pipe Heating and Cooling with Automatic Changeover —
Remote/Wall-Mounted Debonair® Thermostat (24-v)
THERMOSTAT PART # 702893-36
PUR
ORG
REMOTE DEVICE BOX
COOL BLU
HEAT RED
L1 BLK
L2 OR N YEL
HI W/ORG
MED W/RED
LOW W/BRN
UNIT MOUNTED
J BOX
NEC CLASS 1 WIRING
MOTOR
M BLU
H BLK
WHT
COM
3
2
1
RED
2
BLU
1
BLK
3
BLK
RED
RISE
BLU
AQUASTAT
*WHT
BLK
BLOWER
4
PUR
BRN
L RED
VALVE
L2 or N
*WHT
2
1
L1
BLK
WHT
EQUIPMENT
GROUND
ONLY 120V WHT/ALL OTHERS BLK
Fig. 26 — 42C,S,V and 42D (600-1000) 2-Pipe Heating and Cooling with Automatic Changeover —
Remote/Wall-Mounted Thermostat (Line Voltage)
17
THERMOSTAT PART # 702893-36
PUR
ORG
REMOTE DEVICE BOX
COOL BLU
HEAT RED
L1 BLK
L2 OR N YEL
HI W/ORG
MED W/RED
LOW W/BRN
UNIT MOUNTED
J BOX
ONLY 120V WHT/ALL OTHERS BLK
BLK
BLU
RED
0
VALVE
3
1
7
6
8
*WHT
BLK
1
BLK
WHT
*WHT
BLU
BLK
2
NC
NO
H BLK
3
RED
COM
MOTOR
4
3
2
BLOWER
M BLU
4
L RED
2
0
3
3
1
7
BRN
*WHT
BLK
BLU
NC
6
2
8
3
NO
H BLK
RED
COM
MOTOR
4
*WHT
2
BLOWER
M BLU
1
4
WHT
COM
L RED
BLK
2
BLK
1
BLK
RED
RISE
0
3
2
PUR
3
NC
NO
COM
1
4
3
BLU
1
7
6
8
WHT
COM
AQUASTAT
*WHT
EQUIPMENT
GROUND
BLK
L2 or N
L1
Fig. 27 — 42D (1200-2000) 2-Pipe Heating and Cooling with Automatic Changeover —
Remote/Wall-Mounted Thermostat (Line Voltage)
NEC CLASS 2 WIRING
a42-4063
Fig. 28 — 42C,S,V (except VG), and 42D (600-1000 cfm) 2-Pipe Heating and Cooling with
Auxiliary Heat — Transformer and Non-Carrier Relay Board (24-v) (Special Request)
18
a42-4064
Δ120-V WHT ALL OTHERS BLK
NEC CLASS 1 WIRING
Fig. 29 — 42C,S,V (except VG), and 42D (600-1000 cfm) 2-Pipe Heating and Cooling with Auxiliary Heat —
Field-Supplied/Installed Controls (Line Voltage and Control Valves or Electric Heat)
NEC CLASS 1 WIRING
a42-4065
Fig. 30 — 42D (1200-2000) 2-Pipe Heating and Cooling with Auxiliary Heat —
Field-Supplied/Installed Controls (Line Voltage and Control Valves or Electric Heat)
19
a42-4066
Δ120-V WHT ALL OTHERS BLK
NEC CLASS 1 WIRING
Fig. 31 — 42SG,SH,SJ,VA,VB,VC,VE,VF 2-Pipe Heating and Cooling with Auxiliary Heat —
Unit-Mounted Thermostat (Line Voltage)
THERMOSTAT #33CSSN2-FC
R
G
Y1
G3
BLK
DUCT SENSOR 33CSSEN-DS
RS
PUR
RS+5
W1 G2
C H2O CK1
CHANGE OVER
SENSOR
RED
YEL
BLU
BRN
BLK
RED
ORG
WHT
BLK
BLK
VALVE
BLK
BLK
2
Q/C
1
YEL
33
YEL
RED G
QUICK CONNECT
FAN
BLU G2/(W)
BLK G3/(Y)
BLK
COM
(VALVE)
RED
4
(COOL)
3
HI
ORG
(HEAT)
YEL
24
RED L
BLU M
BLU
BLK
*WHT
MED
2
1
BLOWER
BLK H
MOTOR
WHT COM
TRANSFORMER
BLK
EQUIPMENT
GROUND
L1
L2 or N
LOW
WHT/RED
BLK
BLK
*WHT
*WHT
BRN
YEL
0
YEL
3
BLK
L1
1
06
4
2
NC
7
COM8
NO
LIMIT SWITCH
6
BLK
N
WHT
BLK
CONTACTOR
EQUIPMENT
GROUND
ELEC. HEATER
Fig. 32 — 42SG,SH,SJ,VA,VB,VC,VE,VF 2-Pipe Heating and Cooling with Auxiliary Heat —
Unit-Mounted Debonair® Thermostat (24-v), Duct Sensor and Dual Power Source
20
Fig. 33 — 42SG,SH,SJ,VA,VB,VC,VE,VF 2-Pipe Heating and Cooling with Auxiliary Heat —
Unit-Mounted Thermostat (Line Voltage) and Dual Power Source
a42-4067
NEC CLASS 2 WIRING
Fig. 34 — 42C,S,V (except VG), and 42D (600-1000 cfm) 2-Pipe Heating and Cooling with
Auxiliary Heat — Remote/Wall-Mounted Debonair® Thermostat (24-v)
21
a42-4068
NEC CLASS 2 WIRING
Fig. 35 — 42D (1200-2000) 2-Pipe Heating and Cooling with Auxiliary Heat —
Remote/Wall-Mounted Debonair® Thermostat (24-v)
THERMOSTAT #33CSSN2-FC
REMOTE DEVICE BOX
RS+5
RS
R
G
Y1
G3
W1 G2
C H2O CK1
NEC CLASS 2 WIRING
CHANGE OVER
SENSOR
YEL
BLU
BRN
BLK
PUR
RED
ORG
BLK
VALVE
BLK
BLK
COOL
2
Q/C
1
BLK
YEL
33ZCRLYBRD
G
G2/(W)
G3/(Y)
COM
YEL
QUICK CONNECT
FAN
BLK
(VALVE)
RED
4
(COOL)
RED L
BLU M
BLU
3
HI
BLOWER
BLK H
BLK
2
ORG
(HEAT)
YEL
24
*WHT
MED
1
MOTOR
WHT COM
TRANSFORMER
EQUIPMENT
GROUND
L1
L2 or N
BLK
LOW
WHT/RED
BLK
*WHT
*WHT
0
YEL
1
06
EQUIPMENT
GROUND
3
BLK
L1
NC
7
4
COM 8
2
NO
BRN
LIMIT SWITCH
6
BLK
BLK
WHT
N
ELEC. HEATER
Fig. 36 — 42C,S,V (except VG), and 42D (600-1000 cfm) 2-Pipe Heating and Cooling with Auxiliary Heat —
Remote/Wall-Mounted Debonair Thermostat (24-v) and Dual Power Source
22
REMOTE DEVICE BOX
THERMOSTAT #33CSSN2-FC
RS+5
RS
R
G
Y1
G3
W1 G2
C H2O CK1
NEC CLASS 2 WIRING
YEL
BLU
BRN
BLK
PUR
RED
ORG
CHANGE OVER
SENSOR
33ZCRLYBRD
G
G2/(W)
G3/(Y)
COM
BLK
BLK
FAN
ORG
VALVE
QUICK CONNECT
BLK
(VALVE)
(COOL)
HI
BLK
COOL
2
Q/C
1
BLK
(HEAT)
YEL
RED
4
BLU
3
BLK
2
*WHT
MED
1
RED L
BLU M
BLOWER
BLK H
MOTOR
WHT COM
LOW
VER1.3 030700
G
G2/(W)
G3/(Y)
COM
Q/C
BLK
33ZCRLYBRD
FAN
QUICK CONNECT
BLK
(VALVE)
RED
BLU
24
BLU
(COOL)
HI
BLK
TRANSFORMER
BLK
(HEAT)
WHT/BRN
RED/ORG
EQUIP.GROUND
*WHT
MED
4
RED L
BLU M
3
2
1
BLOWER
BLK H
MOTOR
WHT COM
*WHT
LIMIT SWITCH
LOW
VER1.3 030700
YEL
*WHT
EQUIP.GROUND
BLK
L1
N. OR L2
BLK
BLK
YEL
0
1
2
4
6
8
BLK
BLK
L1
BLK
BLK
*WHT
N. OR L2
CONTACTOR
*WHT
ELEC. HEATERS
Fig. 37 — 42D (1200-2000) 2-Pipe Heating and Cooling with Auxiliary Heat —
Remote/Wall-Mounted Debonair® Thermostat (24-v) and Dual Power Source
THERMOSTAT PART # 702893-36
PUR
ORG
REMOTE DEVICE BOX
COOL BLU
HEAT RED
L1 BLK
L2 OR N YEL
HI W/ORG
W/RED
LOW W/BRN
UNIT MOUNTED
J BOX
AQUASTATS
QUICK CONNECT
OPTIONAL
BLOWER
BRN
L RED
RED
M BLU
BLU
BLK
RED
H BLK
MOTOR
WHT
COM
RISE
BLU
PUR
BLK
BLK
*WHT
*WHT
EQUIPMENT
GROUND
RED
RED
BRN
BLU
RED
BLK
*WHT
WHT
RISE
L2 or N
VALVE
L1
*WHT
CONTACTOR
LIMIT SWITCH
1
BLK
BLK
BLK
*WHT
L1
L2 OR N
GRN
ONLY 120V WHT/ALL OTHERS BLK
Fig. 38 — 42C,S,V (except VG), and 42D (600-1000 cfm) 2-Pipe Heating and Cooling with
Auxiliary Heat — Remote/Wall-Mounted Thermostat (Line Voltage) and Dual Power Source
23
THERMOSTAT PART # 702893-36
PUR
ORG
REMOTE DEVICE BOX
COOL BLU
HEAT RED
L1 BLK
L2 OR N YEL
HI W/ORG
MED W/RED
LOW W/BRN
8
H BLK
2
WHT
COM
L RED
1
0
4 RED
2
4
M BLU
3
6
8
BLK
BLU
2
H BLK
*WHT
BLK
1
WHT
COM
*WHT
L2 or N
L1
EQUIPMENT
GROUND
L1
0
2
1
1
1
2
4
6
8
RELAY
BLK
0
1
2
4
RED
3
BLU
6
8
RISE
BLK
1
RED
3
BLU
2
BLK
1
WHT
RISE
LIMIT SWITCH
BLK
*WHT
*WHT
EQUIPMENT
GROUND
1
VALVE
*WHT
BLK
L2 or N
BLK
BLK
4
6
AQUASTATS
2
BLK
2
BLK
BLU
BLU
3
1
BRN
MOTOR
M BLU
3
BLK
BLOWER
RED
BLK
MOTOR
4
PUR
BLOWER
0
L RED
N
BR BRN
QUICK CONNECT
OPTIONAL
RED
UNIT MOUNTED
J BOX
BLK
CONTACTOR
ELEC. HEATER
120V WHT ALL OTHERS BLK
Fig. 39 — 42D (1200-2000) 2-Pipe Heating and Cooling with Auxiliary Heat —
Remote/Wall-Mounted Thermostat (Line Voltage) and Dual Power Source
a42-4069
NEC CLASS 2 WIRING
Fig. 40 — 42C,S,V (except VG), and 42D (600-1000 cfm) 2-Pipe Cooling with Total Electric Heat —
Transformer and Non-Carrier Relay Board (24-v) (Special Request)
24
a42-4070
Δ120-V WHT ALL OTHERS BLK
NEC CLASS 1 WIRING
Fig. 41 — 42C,S,V (except VG), and 42D (600-1000 cfm) 2-Pipe Cooling with Total Electric Heat —
Field-Supplied/Installed Controls (Line Voltage and Control Valves or Electric Heat)
a42-4071
Δ120-V WHT ALL OTHERS BLK
NEC CLASS 1 WIRING
Fig. 42 — 42D (1200-2000) 2-Pipe Cooling with Total Electric Heat —
Field-Supplied/Installed Controls (Line Voltage and Control Valves or Electric Heat)
25
NOTE: Units may have 2 or 4
elements. Elements wired in
parallel.
a42-4072
Fig. 43 — 42SG,SH,SJ,VA,VB,VC,VE,VF 2-Pipe Cooling with Total Electric Heat —
Unit-Mounted Debonair® Thermostat (24-v) and Duct Sensor
a42-4073
Δ120-V WHT ALL
OTHERS BLK
NEC CLASS 1 WIRING
Fig. 44 — 42SG,SH,SJ,VA,VB,VC,VE,VF 2-Pipe Cooling with Total Electric Heat —
Unit-Mounted Thermostat (Line Voltage)
26
THERMOSTAT #33CSSN2-FC
RS+5
DUCT SENSOR 33CSSEN-DS
RS
R
G
Y1
G3
W1 G2
C H2O CK1
RED
YEL
BLU
BRN
BLK
PUR
BLK
RED
ORG
WHT
VALVE
BLK
BLK
2
Q/C
1
YEL
33ZCRLYBRD
YEL
RED G
QUICK CONNECT
FAN
BLU G2/(W)
BLK G3/(Y)
BLK
COM
(VALVE)
RED
4
BLU
(COOL)
HI
ORG
(HEAT)
YEL
24
RED L
BLU M
3
BLK
*WHT
MED
2
1
BLOWER
BLK H
MOTOR
WHT COM
TRANSFORMER
BLK
EQUIPMENT
GROUND
BLK
L1
L2 or N
LOW
WHT/RED
BLK
*WHT
*WHT
BRN
YEL
0
YEL
BLK
L1
1
06
3
4
2
120/277V
NC
7
COM 8
NO
LIMIT SWITCH
6
BLK
N
BLK
WHT
EQUIPMENT
GROUND
ELEC. HEATER
Fig. 45 — 42SG,SH,SJ,VA,VB,VC,VE,VF 2-Pipe Cooling with Total Electric Heat —
Unit-Mounted Debonair® Thermostat (24-v), Duct Sensor and Dual Power Source
Fig. 46 — 42SG,SH,SJ,VA,VB,VC,VE,VF 2-Pipe Cooling with Total Electric Heat —
Unit-Mounted Thermostat (Line Voltage) and Dual Power Source
27
a42-4074
NEC CLASS 2 WIRING
Fig. 47 — 42D (1200-2000) 2-Pipe Cooling with Total Electric Heat —
Remote/Wall-Mounted Debonair® Thermostat (24-v)
Fig. 48 — 42C,S,V (except VG), and 42D (600-1000 cfm) 2-Pipe Cooling with Total Electric Heat —
Remote/Wall-Mounted Thermostat (Line Voltage)
28
THERMOSTAT #33CSSN2-FC
REMOTE DEVICE BOX
RS+5
RS
R
G
Y1
G3
W1 G2
C H2O CK1
NEC CLASS 2 WIRING
YEL
BLU
BRN
BLK
PUR
RED
ORG
VALVE
BLK
COOL
2
Q/C
1
BLK
YEL
33ZCRLYBRD
G
G2/(W)
G3/(Y)
COM
YEL
QUICK CONNECT
FAN
BLK
(VALVE)
RED
4
BLU
RED L
BLU M
(COOL)
3
HI
BLK
BLOWER
BLK H
MOTOR
2
ORG
(HEAT)
YEL
24
*WHT
MED
1
WHT COM
TRANSFORMER
BLK
EQUIPMENT
GROUND
LOW
WHT/RED
BLK
L1
*WHT
*WHT
L2 or N
0
YEL
1
BRN
06
EQUIPMENT
GROUND
3
BLK
4
L1
2
NC
LIMIT SWITCH
7
COM 8
NO
6
BLK
BLK
WHT
N
ELEC. HEATER
Fig. 49 — 42C,S,V (except VG), and 42D (600-1000 cfm) 2-Pipe Cooling with Total Electric Heat —
Remote/Wall-Mounted Debonair® Thermostat (24-v) and Dual Power Source
REMOTE DEVICE BOX
THERMOSTAT #33CSSN2-FC
RS+5
RS
R
G
Y1
G3
W1 G2
C H2O CK1
NEC CLASS 2 WIRING
YEL
BLU
BRN
BLK
PUR
RED
ORG
33ZCRLYBRD
G
G2/(W)
G3/(Y)
COM
FAN
VALVE
RED
BLU
(COOL)
BLK
BLK
HI
2
Q/C
1
(HEAT)
YEL
BLK
*WHT
MED
4
3
2
1
RED L
BLU M
BLOWER
BLK H
MOTOR
WHT COM
LOW
VER1.3 030700
G
G2/(W)
G3/(Y)
COM
*WHT
33ZCRLYBRD
FAN
QUICK CONNECT
BLK
(VALVE)
YEL
RED
ORG
24
BLU
(COOL)
HI
BLK
TRANSFORMER
BLK
(HEAT)
WHT/RED
*WHT
MED
4
RED L
BLU M
3
2
1
BLOWER
BLK H
MOTOR
WHT COM
EQUIP.GROUND
BLK
YEL
*WHT
YEL
0
3
BLK
4
BLK
1
06
EQUIP.GROUND
L1
LIMIT SWITCH
LOW
VER1.3 030700
BLK
2
NC
COM
NO
7
8
BLK
6
BLK
BLK
N. OR L2
WHT
WHT
WHT
ELEC. HEATERS
Fig. 50 — 42D (1200-2000) 2-Pipe Cooling with Total Electric Heat —
Remote/Wall-Mounted Debonair® Thermostat (24-v) and Dual Power Source
29
BLK
N. OR L2
*WHT
L1
BLK
COOL
QUICK CONNECT
BLK
(VALVE)
Fig. 51 — 42C,S,V (except VG), and 42D (600-1000 cfm) 2-Pipe Cooling with Total Electric Heat —
Remote/Wall-Mounted Thermostat (Line Voltage) and Dual Power Source
ONLY 120V WHT/ALL
OTHERS BLK
Fig. 52 — 42D (1200-2000) 2-Pipe Cooling with Total Electric Heat —
Remote/Wall-Mounted Thermostat (Line Voltage) and Dual Power Source
30
a42-4075
NEC CLASS 2 WIRING
Fig. 53 — 42C,S,V (except VG), and 42D (600-1000 cfm) 4-Pipe Heating and Cooling —
Transformer and Non-Carrier Relay Board (24-v) (Special Request)
Δ120-V WHT ALL OTHERS BLK
a42-4076
NEC CLASS 1 WIRING
Fig. 54 — 42C,S,V (except VG), and 42D (600-1000 cfm) 4-Pipe Heating and Cooling —
Field-Supplied/Installed Controls (Line Voltage and Control Valves)
31
a42-4077
Δ120-V WHT ALL OTHERS BLK
NEC CLASS 1 WIRING
Fig. 55 — 42D (1200-2000) 4-Pipe Heating and Cooling —
Field-Supplied/Installed Controls (Line Voltage and Control Valves)
a42-4078
Fig. 56 — 42SG,SH,SJ,VA,VB,VC,VE,VF 4-Pipe Heating and Cooling —
Unit-Mounted Debonair® Thermostat (24-v) and Duct Sensor
32
a42-4079
Δ120-V WHT ALL OTHERS BLK
NEC CLASS 1 WIRING
Fig. 57 — 42SG,SH,SJ,VA,VB,VC,VE,VF 4-Pipe Heating and Cooling —
Unit-Mounted Thermostat (Line Voltage)
THERMOSTAT #33CSSN2-FC
REMOTE DEVICE BOX
RS+5
RS
R
G
Y1
G3
W1 G2
C H2O CK1
NEC CLASS 2 WIRING
YEL
BLU
BRN
BLK
PUR
RED
ORG
VALVE
BLK
COOL
BLK
2
Q/C
1
PUR
YEL
33ZCRLYBRD
VALVE
BLK
HEAT
BLK
2
Q/C
1
BRN
YEL
G
G2/(W)
G3/(Y)
COM
QUICK CONNECT
FAN
BLK
(VALVE)
YEL
RED
BLU
(COOL)
HI
YEL
(HEAT)
YEL
24
MED
BLK
4
RED L
BLU M
3
BLOWER
BLK H
2
1
MOTOR
WHT COM
TRANSFORMER
LOW
EQUIPMENT
GROUND
L1
L2 or N
BLK
*WHT
BLK
*WHT
Fig. 58 — 42C,S,V (except VG), and 42D (600-1000 cfm) 4-Pipe Heating and Cooling —
Remote/Wall-Mounted Debonair® Thermostat (24-v)
33
a42-4080
Fig. 59 — 42D (1200-2000) 4-Pipe Heating and Cooling —
Remote/Wall-Mounted Debonair® Thermostat (24-v)
ONLY 120V WHT/ALL
OTHERS BLK
Fig. 60 — 42C,S,V (except VG), and 42D (600-1000 cfm) 4-Pipe Heating and Cooling —
Remote/Wall-Mounted Thermostat (Line Voltage)
34
Fig. 61 — 42D (1200-2000) 4-Pipe Heating and Cooling — Remote/Wall-Mounted Thermostat (Line Voltage)
NEC CLASS 1 WIRING
a42-4081
Fig. 62 — 42SG,SH,SJ,VA,VB,VC,VE,VF No Controls — Unit-Mounted 3-Speed Switch Only
35
Fig. 63 — 42C,S,V and 42D (600-1000 cfm) No Controls — Wall-Mounted 3-Speed Switch Only
Fig. 64 — 42D (1200-2000) No Controls — Wall-Mounted 3-Speed Switch Only
36
a42-4082
Fig. 65 — 42B No Controls — Single-Phase Unit
a42-4083
Fig. 66 — 42B No Controls — 3-Phase Unit
37
a42-4083
**Only used with overflow switch.
NOTES:
1. This is a point-to-point electrical diagram.
2. Caution: Disconnect power before servicing.
3. See nameplate for correct voltage. Use 75 C minimum copper conductors only. Unit terminals are not designed to accept any other wiring.
4. Blower motor(s) thermally protected.
5. To ensure proper fan interlock and sequencing, external controller must energize heater
stages in numerical order shown and deenergize stages in reverse order (first on, last off).
6. All contractor wiring must conform to electrical codes, national and local.
Fig. 67 — 42B Motor Controls — Single-Phase Only
a42-4085
NOTES:
1. This is a point-to-point electrical diagram.
2. Caution: Disconnect power before servicing.
3. See nameplate for correct voltage. Use 75 C minimum copper conductors only. Unit terminals are not designed to accept any other wiring.
4. Blower motor(s) thermally protected.
5. To ensure proper fan interlock and sequencing, external controller must energize heater
stages in numerical order shown and deenergize stages in reverse order (first on, last off).
6. All contractor wiring must conform to electrical codes, national and local.
Fig. 68 — 42B Motor Controls — 3-Phase Only
38
a42-4086
NOTES:
1. This is a point-to-point electrical diagram.
2. Caution: Disconnect power before servicing.
3. See nameplate for correct voltage. Use 75 C minimum copper conductors only. Unit terminals are not designed to accept any other wiring.
4. Blower motor(s) thermally protected.
5. To ensure proper fan interlock and sequencing, external controller must energize heater
stages in numerical order shown and deenergize stages in reverse order (first on, last off).
6. All contractor wiring must conform to electrical codes, national and local.
7. Wire as detail A for 120/277-v.
Fig. 69 — 42B Motor Controls — Single-Phase with Interlocking Disconnect
a42-4087
NOTES:
1. This is a point-to-point electrical diagram.
2. Caution: Disconnect power before servicing.
3. See name plate for correct voltage. Use 75 C minimum copper conductors only. Unit terminals are not designed to accept any other wiring.
4. Blower motor(s) thermally protected.
5. To ensure proper fan interlock and sequencing, external controller must energize heater
stages in numerical order shown and deenergize stages in reverse order (first on, last off).
6. All contractor wiring must conform to codes, national and local electrical.
Fig. 70 — 42B Motor Controls — 3-Phase with Interlocking Disconnect
39
40
Fig. 71 — 42B Motor Controls — Single-Phase with Interlocking Disconnect and 1-Stage Electric Heater
NOTES:
1. This is a point-to-point electrical diagram.
2. Caution: Disconnect power before servicing.
3. See nameplate for correct voltage. Use 75 C minimum copper conductors only. Unit terminals are not
designed to accept any other wiring.
4. Blower motor thermally protected.
5. To ensure proper fan interlock and sequencing, external controller must energize heater stages in
numerical order shown and deenergize stages in reverse order (i.e., first on will be last off).
6. All contractor wiring must conform to national and local electrical codes.
7. L2 or N label to be placed on bridge near terminal block or disconnect. Label to be oriented along path
of incoming L2 or N.
8. Wires 4 and 5 to be installed as shown in detail A when using part number E035-50011401 disconnect
switch, except wire 5 as shown in Detail C when 120/277-v. All other disconnect switches to be wired as
shown in main diagram.
9. Only on 208-240-v.
a42-4088
41
NOTES:
1. This is a point-to-point electrical diagram.
2. Caution: Disconnect power before servicing.
3. See nameplate for correct voltage. Use 75 C minimum copper conductors only. Unit terminals are
not designed to accept any other wiring.
4. Blower motor thermally protected.
5. To ensure proper fan interlock and sequencing, external controller must energize heater stages in
numerical order shown and deenergize stages in reverse order (i.e., first on will be last off).
6. All contractor wiring must conform to national and local electrical codes.
7. Wires 9, 13, and 14 will terminate inside contactor lug.
8. Wires 4, 5, and 6 to be installed as shown in Detail A when using part number E035-50011401
disconnect switch. All other disconnect switches to be wired as shown in the main diagram.
9. Use applicable heater configuration shown for proper connections.
Fig. 72 — 42B Motor Controls — 3-Phase with Interlocking Disconnect and 1-Stage Electric Heater
a42-4089
42
Fig. 73 — 42B Motor Controls — 3-Phase with Interlocking Disconnect and 2-Stage Electric Heater
NOTES:
1. This is a point-to-point electrical diagram.
2. Caution: Disconnect power before servicing.
3. See nameplate for correct voltage. Use 75 C minimum copper conductors only. Unit terminals are
not designed to accept any other wiring.
4. Blower motor thermally protected.
5. To ensure proper fan interlock and sequencing, external controller must energize heater stages in
numerical order shown and deenergize stages in reverse order (i.e., first on will be last off).
6. All contractor wiring must conform to local and national electrical codes.
7. Wires 9, 13, and 14 will terminate inside contactor lug.
8. Wires 4, 5, and 6 to be installed as shown in Detail A when using part number E035-50011401 disconnect switch. All other disconnect switches to be wired as shown in the main diagram.
a42-4090
43
NOTES:
1. This is a point-to-point electrical diagram.
2. Caution: Disconnect power before servicing.
3. See nameplate for correct voltage. Use 75 C minimum copper conductors only. Unit terminals are
not designed to accept any other wiring.
4. Blower motor thermally protected.
5. To ensure proper fan interlock and sequencing, external controller must energize heater stages in
numerical order shown and deenergize stages in reverse order (i.e., first on will be last off).
6. All contractor wiring must conform to local and national electrical codes.
7. Wires 9, 13, and 14 will terminate inside contactor lug.
8. Wires 4, 5, and 6 to be installed as shown in Detail A when using part number E035-50011401 disconnect switch. All other disconnect switches to be wired as shown in the main diagram.
Fig. 74 — 42B Motor Controls — 3-Phase with Interlocking Disconnect and 3-Stage Electric Heater
a42-4091
a42-4092
Fig. 75 — 42B Sunne T-170 Thermostat — 2-Pipe Cool/Heat
a42-4093
Fig. 76 — 42B Sunne T-170 Thermostat — 2-Pipe Cooling With Electric Heat
44
a42-4094
Fig. 77 — 42B Sunne T-170 Thermostat — 4-Pipe Cooling and Heating
TRANSFORMER
Fig. 78 — Master/Slave Wiring Diagram (Special Request) — Master Control Option
45
Fig. 79 — Master/Slave Wiring Diagram (Special Request) — Slave Control Option
46
Copyright 2008 Carrier Corporation
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-56420002-01
Printed in U.S.A.
Form 42-3W
Pg 48
10-08
Replaces: 42-2W

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