Forced Air - ECONAR Products

Transcription

Air
Installation & Operation Manual Forced
Installation & Operation Manual
Engineering Specifications
ECONAR ColdClimate Series Forced Air
Models REC-V036 – REC-V060
Table of Contents
I.
Key & Legend ................................................................................................................................................................... 2
Key to Model Numbers ....................................................................................................................................................... 2
Configuration Options ......................................................................................................................................................... 3
Legend for Tables ................................................................................................................................................................ 3
II. Warnings & Cautions ....................................................................................................................................................... 4
III. General Information ........................................................................................................................................................ 4
Inspection ............................................................................................................................................................................ 4
Storage ................................................................................................................................................................................ 4
Protection ............................................................................................................................................................................ 5
Pre-Installation Preparation ................................................................................................................................................ 5
IV. Best Practices ................................................................................................................................................................... 5
System Sizing ....................................................................................................................................................................... 5
Building Heat Loss/Heat Gain .......................................................................................................................................... 5
Ground Sources and Design Water Temperatures ........................................................................................................ 5
Temperature limitations .................................................................................................................................................. 6
V. System design .................................................................................................................................................................. 6
Ground Source Design ......................................................................................................................................................... 6
Ground Loop Installation ................................................................................................................................................. 6
Ground Water Installation ............................................................................................................................................... 7
Application Diagrams .......................................................................................................................................................... 8
Unit location/mounting ....................................................................................................................................................... 8
VI. Electrical........................................................................................................................................................................... 9
Controller ............................................................................................................................................................................ 9
LED Lights .......................................................................................................................................................................... 11
VII. Heat Pump Commissioning............................................................................................................................................ 12
Maintenance ..................................................................................................................................................................... 13
VIII. Accessories .................................................................................................................................................................... 13
Room Thermostat.............................................................................................................................................................. 13
Desuperheater................................................................................................................................................................... 13
IX. Engineering Specifications ............................................................................................................................................. 16
Performance Ratings ......................................................................................................................................................... 16
Performance Data ............................................................................................................................................................. 18
Physical Data ..................................................................................................................................................................... 24
Electrical Data.................................................................................................................................................................... 25
Blower Performance.......................................................................................................................................................... 25
Water Coil Pressure Drop Ratings ..................................................................................................................................... 26
X. Figure ............................................................................................................................................................................. 27
Figure 1 – Ground Loop Water Plumbing ...................................................................................................................... 27
Figure 2 – Ground Water Plumbing ............................................................................................................................... 27
Figure 3 – Preferred Desuperheater Installation ........................................................................................................... 28
Figure 4 – Alternate Desuperheater Installation ........................................................................................................... 28
XI. Troubleshooting............................................................................................................................................................. 29
XII. Wiring Diagram .............................................................................................................................................................. 37
1
I. KEY & LEGEND
KEY TO MODEL NUMBERS
R E C - V 036 - A R S - E C – XXX
[Application]
R = Series
[Special]
Mfg Code
[Build]
E = ECONAR
[Compressor]
C = ColdClimate
[Heat Exchanger]
C = Copper
N = Cupronickel source coil
[Configuration]
V = Vertical (forced air)
[Blower]
E = ECM
[Unit Size]
036 = 3 Ton
048 = 4 Ton
060 = 5 Ton
[Domestic Hot Water]
S = Desuperheater
X = none
[Electrical Supply]
A = 208/230V-60Hz, Single Phase
[Air Return]
L = Left Return (vertical)
R = Right Return (vertical)
2
CONFIGURATION OPTIONS
 Standard
 Special Order
- Not Available
Model Suffix
Description
036 048 060
REC – **** - A** - ** - ***
208/230-1-60 Hz, Single Phase



REC – **** - M** - ** - ***
208/230-3-60 Hz, Three Phase



REC – **** - N** - ** - ***
460/230-3-60 Hz, Three Phase



REC – V*** - *L* - ** - ***
Left return



REC – V*** - *R* - ** - ***
Right return



REC – **** - **X - ** - ***
No Desuperheater



REC – **** - **S - ** - ***
Desuperheater



REC – **** - *** - *C - ***
Standard, Copper



REC – **** - *** - *N - ***
Cupronickel source coil



LEGEND FOR TABLES
BTU/hr
CAP
COP
CFM
DB
DEWT
DHW
DLWT
dP
DSH
EER
EWT
FLA
GND
Heating or cooling capacity
Capacity
Coefficient of performance (BTU/hr out : BTU/hr in)
Cubic feet per minute
Dry-bulb entering air temperature
Demand Entering Water Temperature
Demand Hot Water
Demand Leaving Water Temperature
Pressure drop across heat pump
Desuperheater
Energy efficient ratio (BTU/hr CAP : watts in)
Entering water temperature
Full-load amperage
Ground
GPM
HE
HR
HYD
kW
LLTC
LLTH
LRA
LWT
MBTU/hr
RLA
SLT
VA
WB
3
Gallons Per Minute
Heat Extracted
Heat Rejected
Hydronic
Kilowatt
Liquid Line Temperature Cooling
Liquid Line Temperature Heating
Locked-rotor amperage
Leaving water temperature
Btu/hr x 1000
Rated-load amperage
Suction Line Temperature
Volt-amperes
Wet-bulb entering air temperature
CAUTION – Three-phase units must be wired
II. WARNINGS & CAUTIONS
properly to ensure proper compressor rotation.
Improper rotation may result in compressor
damage. An electronic phase sequence indicator
must be used to check supply-wiring phases.
Also, the “Wild” leg of the three-phase power
must be connected to the middle leg on the
contactor.
Note – Always refer to the inside of the lower
front door for the correct wiring diagram, and
always refer to the nameplate on the exterior of
the
cabinet
for
the
correct
electrical
specifications.
WARNING
WARNING
– Service of refrigerant-based
–Verify refrigerant type before
equipment can be hazardous due to elevated
servicing. The nameplate on the heat pump
system pressures and hazardous voltages. Only
identifies the type and the amount of refrigerant.
trained and qualified personnel should install,
All refrigerant removed from these units must be
repair or service. Installer is responsible to ensure
reclaimed by following accepted industry and
that all local electrical, plumbing, heating and air
agency procedures.
conditioning codes are followed.
CAUTION
WARNING
– ELECTRICAL SHOCK CAN
protected. Insufficient amounts of antifreeze may
CAUSE PERSONAL INJURY OR DEATH.
cause severe damage and will void warranty.
Disconnect all power supplies before installing or
Loop antifreeze must be non-flammable. Never
servicing electrical devices. Only trained and
operate with ground loop flow rates less than
qualified personnel should install, repair or
specified. Continuous operation at low flow or no
service this equipment.
flow may cause severe damage and may void
WARNING
– Ground loop must be freeze
warranty.
–
THE
UNIT
MUST
BE
III. GENERAL INFORMATION
PROPERLY GROUNDED!
The main electrical service must be protected by a
fuse or circuit breaker and be capable of
providing the amperes required by the unit at
nameplate voltage. All wiring must comply with
the national electrical code and/or any local codes
that may apply. Access to the line voltage
contactor is through the knockouts provided on
the side of the heat pump as labeled. Route EMT
or flexible conduit with appropriate size and type
of wire.
INSPECTION
Equipment should be inspected upon receipt to
assure that damage has not occurred during
shipment of the unit. Carefully check the shipping
company bill of lading against the packing slip to
verify that all units and accessory packages have
been received. Inspect each package for physical
damage and ensure that the carrier makes
Ensure adequate supply wiring to minimize the
level of dimming lights during compressor
startup on single-phase installations. Some
dimming is normal upon compressor start-up.
notation of any damage or missing packages on
bill of lading records. Pictures of any damage are
recommended. Concealed damage should be
reported to the shipping company immediately.
CAUTION
– Route field electrical wiring to
avoid contact with electrically live bare metal
parts inside the electrical box.
STORAGE
Unit should be stored in a clean, dry location in
4

the original shipping packaging. Units shall be
stored in an upright position and should not be
Inspect electrical connections for cleanliness
and attachment

stacked unless noted on the shipping packaging.
Inspect liquid connections to assure that any
debris has been removed and caps are
PROTECTION
removed as appropriate.
Units should be protected when on the building
IV.BEST PRACTICES
site from damage and contamination. Keep units
covered or in original shipping packaging during
SYSTEM SIZING
job site construction. All physical connections (air
supply and return, piping, electrical) should be
Selecting the unit capacity of a geothermal heat
protected
pump requires three things:
and
covered/capped
prior
to
installation.
PRE-INSTALLATION PREPARATION
Care should be taken to assure that the
installation of the geothermal unit is successful.
Locate
the
unit
where
there
is

Building Heat Loss / Heat Gain.

Ground Sources and Design Water Temperatures.

Temperature Limitations.
BUILDING HEAT LOSS/HEAT GAIN
adequate
ventilation and room for servicing. Units should
The space load must be estimated accurately for
be placed on a level surface on a vibration–
any successful HVAC installation. There are
absorbing pad slightly larger than the base of the
many guides or computer programs available for
unit. Care should be taken to use the proper duct
estimating heat loss and gain, including the
size, piping is not hard-plumbed to the unit, and
Manual J, and others. After the heat loss and gain
any sound or vibration is not transmitted into the
analysis
surroundings.
Temperatures
is
completed,
(EWT’s)
are
Entering
Water
established,
and
heating conditions are determined. The heat
Units are designed for indoor installation only
pump can now be selected using the heat pump
where the ambient temperature remains above
data found in the Engineering Specifications
45°F. Do not use the heat pump for initial heating
section. Choose the capacity of the heat pump
of the building during construction. Operating the
based on both heating and cooling loads.
heat pump during construction or renovation will
subject the unit to contamination, potentially
GROUND SOURCES AND DESIGN WATER
TEMPERATURES
resulting in failure of the unit. Starting the heat
pump in a cold environment may flush lubricant
from the compressor resulting in compressor
Ground sources include the Ground Water
damage and ultimately, unit failure.
(typically a well) and the Ground Loop varieties.

Water flow-rate requirements vary based on
Review the electrical data on the nameplate to
configuration. The Engineering Specifications
assure that the correct unit has been shipped

section provides capacities at different loop
Carefully remove any packing material from
entering water temperatures and entering air
the outside and inside of the unit and inspect
temperatures.
for any concealed damage
5
energy (in the heating mode) from the relatively
GROUND LOOP SYSTEMS
warm surrounding soil through the pipe and into
Loop systems use high-density polyethylene pipe
the
buried underground to supply a tempered water
the
loop
Entering
solution.
The
solution
energy with the solution, and then the solution
operate at higher flow rates than ground water
because
cold
circulates to the heat pump, which transfers
solution back to the heat pump. Ground loops
systems
relatively
circulates back through the ground to extract
Water
more energy.
Temperature (EWT) is lower. EWT affects the
capacity of the unit in both heating and cooling
CAUTION – Ground Loops must
modes, and loops in cold climates are normally
freeze
sized to supply wintertime EWT to the heat pump
antifreeze may result in a freeze rupture of the
down to 25°F.
unit or can cause unit shutdown problems during
protected.
Insufficient
be properly
amounts
of
cold weather operation. Propylene glycol is a
GROUND WATER SYSTEMS
common antifreeze solution. Propylene glycol
See Figure 3
antifreeze solution should be mixed 25% with
Note – If a heat pump is installed with ground
water to obtain a 15°F freeze protection. Enertechs
water, it should have a Cupro-Nickel (CuNi)
proprietary Geothermal Transfer Fluid (GTF)
water coil. Cupro-Nickel water coils withstand
is methanol-based antifreeze and should be mixed
well water much better than standard copper
50% with water to achieve freeze protection of
water coils.
12°F.
TEMPERATURE LIMITATIONS
Important
– Do not mix more than 25%
propylene glycol with water in an attempt to
Be aware of the operating range of the geothermal
achieve lower than 15°F freeze protection, since
system when sizing the particular heat pump to
more concentrated mixtures of propylene glycol
avoid premature equipment failure. Operating
become too viscous at low temperatures and will
outside of these limitations may cause severe
become more difficult to pump through the earth
damage to the equipment and may
loop. Horizontal loops typically use GTF, and
void
warranty.
CAUTIONS:
vertical loops typically use propylene glycol.
Note – Always check State and Local codes for any
Reference tables in engineering
section for acceptable operating conditions.
special requirements on antifreeze solutions.
V. SYSTEM DESIGN
CAUTION – Never operate with flow rates less
than specified. Low flow or no flow may cause
the unit to shut down on a pressure lockout or
GROUND SOURCE DESIGN
may cause a freeze rupture of the heat exchanger.
GROUND LOOP INSTALLATION
Important–
A Ground Loop system circulates the same
Pressure/Temperature (P/T) ports in the entering
antifreeze solution through a closed system of
and leaving water line of the heat pump is
high-density underground polyethylene pipe. As
recommended (see figure 2). A thermometer can
the solution passes through the pipe, it collects
be inserted into the P/T ports to check entering
6
Installation
of
and leaving water temperatures. A pressure
should always remain above 20 psig, to ensure
gauge can also be inserted into these P/T ports to
circulation pumps do not cavitate or pull air into
determine the pressure differential between the
the
entering
distributor or factory representative for more
and
differential
leaving
can
then
water.
be
This
pressure
compared
to
the
system.
Contact
your
local
installer,
information.
specification data on each particular heat pump to
confirm the proper flow rate of the system.
GROUND WATER INSTALLATION
An individually-sized Enertech Flow Center can
Since water is the source of energy in the winter
supply pumping requirements for the Ground
and the energy sink in the summer, a good water
Loop fluid.
supply
is
possibly
the
most
important
requirement of a geothermal heat pump system
Note – Refer to instructions included with the
installation.
Flow Center for properly purging the ground
loop.
A Ground Water system gets its name from the
Filling and purging a loop system are very
open discharge of water after it has been used by
important steps to ensure proper heat pump
the heat pump. A well must be available that can
operation. Each loop must be purged with
supply all of the water requirements of the heat
enough flow to ensure two feet per second flow
pump for up to 24 hours/day on the coldest
rate in each circuit in the loop. This normally
winter day plus any other water requirements
requires a 1½ to 3 HP high-head pump to
drawing off of that same well. A bladder type
circulate fluid through the loop to remove all the
pressure tank with a “draw down” of at least 1 ½
air out of the loop. Allow the pump to run 10 to
times the well pump capacity must be installed on
15 minutes after the last air bubbles have been
the supply side of the heat pump.
removed. After purging is completed, add the
Important – A screen strainer must be placed
calculated proper amount of antifreeze to give a
on the supply line with a mesh size of 40 or 60
12°F to 15°F freeze protection. Always pump
and enough surface area to allow for particle
away from coil or into the earth loop. After
buildup between cleanings.
antifreeze has been installed and thoroughly
circulated, it
should be
measured with
Important
a
– It is highly recommended that
hydrometer (methanol), refractometer (propylene
Pressure/Temperature (P/T) ports be placed in the
glycol), or Enertech methanol anti-freeze tester to
supply and discharge lines so that thermometers
determine the actual freezing point of the
or pressure gauges can be inserted into the water
solution.
stream.
The purge pump can be used to pressurize the
Important
system for a final static pressure of 30-40 psig
visual flow meter be installed to allow visual
after the loop pipe has had enough time to stretch.
inspection of the flow. If flow meter appears
In order to achieve the 30 to 40 psig final pressure,
cloudy the water coil may need to be cleaned.
the loop may need to be initially pressurized to
– It is highly recommended that a
A solenoid control valve must be installed on the
60-65 psig. This static pressure may vary 10 psig
water discharge side of the heat pump to regulate
from heating to cooling season, but the pressure
7
Important
the flow through the unit.
Schedule
40
PVC
piping,
copper
– To ensure easy removal and
replacement of access panels, leave panels
tubing,
secured in place until the unit is set in place and
polyethylene or rubber hose can be used for
leveled.
supply and discharge water lines. Make sure line
sizes are large enough to supply the required flow
Important
with a reasonable pressure drop (generally 1”
ambient temperature remains above 45°F. Service
diameter minimum). Consult local plumbing
is primarily from the front. Rear and side access
codes to ensure compliance.
should be provided when possible, 12” clearance
CAUTION – Never operate with flow rates less
on all sides is desirable.
than specified. Low flow rates, or no flow, may
Important
cause the unit to shut down on a pressure lockout
required under the entire unit if accidental water
or may cause a freeze rupture of the heat
discharge could damage surrounding floors,
exchanger. If unit is operated without flow
walls or ceilings.
warranty with be voided.
compliance.
GROUND WATER FREEZE PROTECTION
CAUTION
CAUTION
– Locate the unit indoors where
– A field installed drain pan is
Check local codes for
– Do not mount components or
pipe to the exterior of the heat pump cabinet.
– Only equipment ordered with a
CuNi coil shall be used on ground water
Important
applications.
vibration absorbing pad slightly larger than the
These units are provided with
– Units must be mounted on a
base to provide isolation between unit and floor.
freeze protection.
Water supply pumps shall not be hard plumbed
APPLICATION DIAGRAMS
directly to the unit with copper pipe; this could
transfer vibration from the water pump to the
Figures 1 through 4, show the components of a
refrigeration circuit, causing a resonating sound.
heat pump system discussed above used in some
Flexible water connection use is recommended to
common applications. These figures by no means
eliminate transfer of vibration wherever possible.
represent all the possible heat pump applications,
but they do show important principles that can be
CAUTION
applied to any system.
into plastic female or into metal female fittings.
Never use metal male fittings into plastic female
UNIT LOCATION/MOUNTING
fittings. On metal-to-metal fittings; use pipe
thread compound, do not use pipe thread tape.
CAUTION – Units must be kept in an upright
Hand tighten first, and then only tighten an
position during transportation or installation, or
severe
internal
damage
may
occur.
additional ½ turn with a tool if necessary. On
Never
plastic fittings, always use 2 to 3 wraps of pipe
transport a heat pump on its side or back.
CAUTION
– Always use plastic male fittings
thread tape, do not use pipe thread compound.
– Do not use this unit during
Hand tighten first, then only an additional ½ turn
construction. Dust and debris may contaminate
with a tool if necessary. Do not over-tighten, as
electrical and mechanical components; resulting
damage may occur.
in damage.
8
Important
All Possible Combinations of Room Thermostat Inputs (24 VAC)
– Install with constant downward
Mode
slope.
Fan Only
Heating 1st Stage
VI. ELECTRICAL
Note
Heating 2 Stage
Heating Auxillary
Heating 2nd Stage Auxiliary
panel for the correct wiring diagram and guide to
Cooling
LEDs.
x
x
x
x
st
1 Stage Emergency Heat
Important –
2nd Stage Emergency Heat
If external controls require more
than
shown
in
the
engineering
Y2
x
nd
– Always refer to the inside of the front
power
Y1
x
x
x
x
x
x
Operation Inputs
W1
O
G
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
W2
x
x
x
The heat pump will not run if there is an invalid
specification, external transformer & isolation
thermostat call and the LEDs will be illuminated,
relays should be used.
see LED section.
Important – Miswiring of 24Vac control voltage
Anti-Short Cycle
on system controls can result in transformer
Every time the compressor relay is turned off, the
burnout.
time delay function will prevent the compressor
Important – Units with dual voltage rating
relay from turning on for a period of 5 minutes.
(example, 208/230) are factory-wired for the
Reset
higher voltage (example, 230). If connected to
power supply having the lower voltage, change
A push button located on the control board called
wiring to transformer primary to the correct lead;
'TEST' is used to shorten the anti-short cycle
otherwise premature failure, or inability to
progress. The anti-short cycle time is shortened
operate the control components may occur.
from 5 minutes to 1 minute. This button, intended
for use only by a qualified service technician,
CONTROLLER
eliminates the need to wait for the time out period
when cycling in different modes of operation.
The controller is designed to provide high
reliability in controlling numerous operating
Fan Operation
functions of geothermal heat pumps with space
heating,
space
cooling,
desuperheater
The fan has an extended run time of 2 minutes. If
and
the thermostat/fan has an internal fan extended
dedicated domestic water heating. This controller
run time, the fan could potentially run for longer
switches control devices by reviewing the various
than 2 minutes once the G call is satisfied.
control inputs and temperature information,
making decisions based on operation priority.
ECM Fan Speed Control
Power up Initialization
The controller has the ability to change the ECM
When system powers up, there is a random start
Fan Speed. Refer to the CFM table in the
up time of 30-90 seconds. Once per second, the
Engineering Specifications for specific CFM taps.
controller will examine process inputs, execute
Using +/- Taps will adjust all CFM values + or -
the control algorithm for the system, and update
10%.
the process outputs.
9
Reversing Valve Control
hot water circulating pump to turn on every five
Every time the compressor relay output is turned
minutes to circulate water from the hot water
off following cooling operation, reversing valve
storage tank to the heat pump. At the end of a 2
will stay energized 90 seconds. This allows
minute
system pressure to equalize prior to de-energizing
temperature), if the temperature of the water
reversing valve. After a heating call, reversing
entering the heat pump is equal to or less than the
valve will be energized & de-energized 90
programmed cut-in temperature after 2 minutes
seconds after compressor output is turned off.
of continuous circulation, water heating mode is
Switching the reversing valve after each run cycle
initiated.
period
(sampling
of
the
water
keeps it well lubricated and operational.
In
Desuperheater Operation
The
controller
temperatures
ON
position, the
pump
will
run
continuously, similarly the water will be sampled
monitors
allowing
the
unit
continuously. See priority settings & operation for
desuperheater
equipped
more information.
with
desuperheater to operate most efficiently. Refer to
STG-Ground Loop Pump Operation
the Desuperheater section for more information
Water circulating pumps used to circulate an
about Desuperheater controls.
antifreeze solution can be staged by the controller
Dip Switches
to cycle on one or more pumps at different
The dip switches mounted on the controller board
entering water temperatures.
allow the installer to select various features for
Loop pump relay #1 is the primary pump control.
operating the unit. Once the dip switch position is
It is energized whenever there is a call for space
changed, power must be reset in order for the
heating, space cooling, and water heating.
change to register on the control board.
The dip switches are listed below.
Staging Control
Main Board
In the space heating mode, as fluid temperature
Designator
Description
Dipswitch On
Dipswitch
Off
FRZ
Freeze Protection
17°F
35°F
Single or Two
Stage Compressor
Two Stage
Single Stage
Enable/Disable
Desuperheater
Enabled
Disabled
STG
2
DSH
PMP
HYD
2
declines in the winter, more flow (gpm) is
required to provide more heat transfer from the
ground to the heat pump. Likewise, in the space
cooling mode, as fluid temperature increases,
more flow (gpm) is required to remove heat from
the heat pump to the ground.
1
Loop Pumps
Together
Separate
Water-to-Water or
Water-to-Air
Water-toWater
Water-to-Air
Energy savings are increased because the heat
pump can cycle off one or more pumps when
1
See Ground Loop Pump operation for more information.
2
Used for internal software to verify board configuration w/model
number.
they are not needed.
Heating Operation (Thermostat or DHW)
Explanation of Dip Switch Settings
Ground loop pump #2 will turn on once the
SMP - Sampling Mode
entering water temperature falls below 60°F.
In the OFF position, this selection commands the
Pump #2 will turn off once the temperature rises
10
to 65° F. Pump #2 will turn on/off “on the fly”.
Low Pressure - Refrigerant pressure too low
EWT is continually checked during operation.
Freeze - LWT below setpoint
Cooling Operation
Overflow - Drain pan filled with water
Ground loop pump #2 will turn on once the
Guide to LEDs
entering water temperature rises above 60°F.
Pump #2 will turn off once the temperature falls
LED
Illuminated
Action
Status
PWR
Flashing
Solid
Random Start Up Time - wait.
Power to Unit
Running Heating and/or Auxiliary
Heat
1. Waiting to run Heating and/or
Auxiliary Heat
2. Soft lockout - hold DIAG button for
2 seconds. Lockout LED will be
illuminated if soft lockout.
Running Cooling
1. Waiting to run Cooling
2. Soft lockout - hold DIAG button for
2 seconds. Lockout LED will be
illuminated if soft lockout.
to 55° F. Pump #2 will turn on/off “on the fly”.
Solid
EWT is continually checked during operation.
HEATING
LED LIGHTS
Flashing
PWR LED
Solid
Solid illumination of this light indicates that the
COOLING
control board is functioning properly. During the
Flashing
random start period the LED will be flashing. No
light may indicate loss of power to board.
Voltage must be 18VA - 32VA.
Mode of Operation LED Lights
HEATING &
COOLING &
DEMAND
HOT WATER
Flashing
- all
HEATING &
Service LED
Solid both
COOLING &
Service LED
Solid both
Service LED
Flashing
Without
Mode
LEDs
Flashing
Mode of Operation LED lights (three) in addition
to the PWR LED, aid in troubleshooting and
indicating the mode of operation. While a mode is
running the LED will be illuminated solid. If a
mode is waiting to run for the anti-short cycle
period the LED will be flashing.
Invalid Input from Thermostat
Hard Lockout - type of lockout LED
Illuminated occurred while Heating
was running.
Hard Lockout - type of lockout LED
Illuminated occurred while Cooling
was running.
Thermistor Error
1. If FREEZE - LWT Error
2. If LOW PRESSURE - EWT Error
3. If High DGT - DGT Error
4. If OVERFLOW - DEWT Error
Heating - Space Heating or Electric Heat
Soft and Hard Safety Lockouts
Operation
On occasion, the unit’s operating conditions may
exceed the parameters set for normal operation.
Cooling - Space Cooling Operation
This means that the unit could lock out on a safety
Demand Hot Water - Demand Hot Water
control, thus preventing the unit from operating.
Operation (not available in ECONAR ColdClimate series)
To
restore
operation,
a
qualified
service
technician must service the unit.
Service LED Lights
Service LED lights (five) in addition to the PWR
To eliminate nuisance lockouts as a result of high
and Mode LEDs, aid in troubleshooting. They are
or low pressure safety trips, the controller has the
as follows:
ability to allow more than one lockout (soft
lockout) before it decides to permanently lock out
(hard lockout) the mode of operation in which the
High DGT - Hot refrigerant gas
lockout occurred.
High Pressure - Excessive refrigerant pressure
11
For example, when the high pressure lockout
and the LWT rises 7°F above setpoint. If a freeze
occurs in heating mode for the third time in a
lockout is initiated 3 times in a 90 minute period a
period less than 90 minutes, the heating mode
hard lockout will be set requiring a manual power
will be disabled until a manual reset is performed.
reset.
High & Low Pressure Lockout
Active Control Panel
The High or Low Pressure LED is illuminated
All LED lights are also located on the Membrane.
once a Hard Lockout occurs. A hard lockout is
The TEST button is located on the membrane at
defined as; high or low pressure switch has been
the top left corner or on the left below the service
activated 3 times within 90 minutes. Once the
LEDs. The DIAG button is located on the
high or low pressure switch is activated, the unit
membrane at the top right corner or on the right
is shut down and soft lockout is triggered. The
below the “t” in Enertech.
unit will be shut down for 15 minutes. At which
VII.
time it will attempt to run again if there is a
HEAT PUMP COMMISSIONING
thermostat input. If a hard lockout occurs power
Before applying power to the heat pump, check
must be reset in order to clear the lockout.
the following items:
Discharge Gas Temperature (DGT) Lockout

Water supply plumbing to the heat pump is
The discharge gas refrigerant temperature is
completed and operating. Manually open the
continually
gas
water valve on well systems to check flow.
temperature rises above 250°F a soft lockout is
Make sure all valves are open and air has been
initiated and the unit is shut down. Unit will be
purged from a loop system. Never operate the
shut down for 15 minutes, at which time it will
system without correct water supply flow.
monitored
and
when
hot
attempt to run again if there is a thermostat input
and the DGT temperature is below 200°F. If DGT
 All high voltage and all low voltage wiring is
reaches 250°F 3 times in a 90 minute period a hard
correct and checked out, including wire sizes,
lockout will be set requiring a manual power
fuses and breakers. Set system to the “OFF”
reset.
position.
Note
Overflow Lockout
– The heat pump is located in a warm
Once the overflow sensor is triggered a hard
area (above 45°F). (Starting the system with
lockout will be set requiring a manual power
low ambient temperature conditions is more
reset.
difficult and may cause low-pressure lockout.)
Do not leave the area until the space is
brought up to operating temperatures.
Freeze Lockout
Freeze protection lockout occurs when the leaving
Commissioning
water temperature falls below the setpoint of
pump remains on for 15 minutes. The unit will
The controller has the ability to perform a system
check on all modes using the Commissioning
process.
Run this process at the end of each installation -
attempt to run again if there is a thermostat input
data will be stored in the controller.
LWT. At which time a soft lockout is initiated and
the compressor is shut down. The ground loop
12
1. Reset Power.
part of the system installation) will display a
system lockout. If lockout occurs, follow the
procedure below:
2. Hold the TEST button for 15 seconds.
PWR & Cooling LED will begin flashing.
3. Cooling will be run for 15 minutes.
1. Determine and record which indicator lights
4. Unit idle for 3 minutes while Heating LED
on the controller are illuminated. (Refer to
flashing.
Troubleshooting Section for more information
5. Heating will be run for 15 minutes.
on possible causes of Lockout Conditions.)
6. Unit idle for 3 minutes.
2. Check for correct water supply from the
7. If equipped with Desuperheater - the
ground loop or ground water system.
Desuperheater will run for 15 minutes.
3. Reset the system by disconnecting power at
Unit will run in Heating mode.
the circuit breaker for one minute and then
8. Once complete the following LEDs will be
reapplying.
illuminated:
4. If shutdown reoccurs,

Call your Enertech
a. Power – Off
dealer. Do not continuously reset the lockout
b. Heating – On
condition or serious damage may occur.
c. Cooling - On
Note
d. Demand Hot Water – On
– Improper fluid flows or incorrect
antifreeze levels are the cause of almost all
9. Hold TEST button for 5 seconds or power
lockouts.
reset to resume normal operation.
MAINTENANCE
VIII. ACCESSORIES
Properly installed, the Enertech heat pump
ROOM THERMOSTAT
requires only minor maintenance such as periodic
cleaning of the ground water heat exchanger for
Installations may include a wide variation of
heat
ground-water
available electronic room thermostats, and most
applications. Setting up regular service checkups
of them must be configured by the Installer and
with your Enertech dealer should be considered.
checked out after installation. For the number of
Any major problems with the heat pump system
wires required or other questions, please refer to
operation will be indicated on the lockout lights.
the installation manual that was sent with the
pumps
CAUTION
installed
in
thermostat.
– During evacuation of refrigerant
of a system not having antifreeze protection of the
DESUPERHEATER
ground-side, water in the unprotected heat
exchanger must be removed or continuously
A heat pump equipped with a double-wall vented
flowing to avoid a potential heat exchanger
desuperheater can provide supplemental heating
failure caused by freeze rupture.
of domestic hot water by stripping some energy
from the superheated gas leaving the compressor
Important
– Always install a new filter/drier
after replacing a refrigeration component
(compressor, etc.).
and transferring it to a hot water tank. A built in
The Enertech controller (and a room thermostat, if
the tank.
desuperheater pump circulates water from the
domestic hot water tank, heats it and returns it to
13
The desuperheater only provides supplemental
damaged.
hot water when the compressor is running to
condition space.
All air must be purged from the desuperheater
Because the desuperheater is
plumbing before the pump is engaged. To purge
using some energy from the heat pump to heat
small amounts of air from the lines, loosen the
water, the heat pump’s capacity in the winter is
about
10%
less
than
a
unit
without
desuperheater pump from its housing by turning
a
the brass collar. Let water drip out of the housing
desuperheater. The desuperheater can be disabled
until flow is established, and re-tighten the brass
with a dip switch on the control board.
collar. Using 1/2-inch copper tubing or larger
The control board has the ability to control
from the tank to the desuperheater inlet is
desuperheater operation. The desuperheater will
recommended to allow proper water flow. An air
operate
desuperheater
vent in the inlet line can also help systems where
temperature is below 120°F and the compressor is
air is a problem. If one is used, mount it near the
energized. The desuperheater will continue to run
desuperheater inlet roughly 2-1/2 inches above
until the DEWT reaches 130°F, at which point
the horizontal pipe. Shutoff valves allow access to
operation will end.
the desuperheater plumbing without draining the
once
the
entering
hot water tank. Keep the valves open when the
Desuperheater operation is ended once an
pump is running.
auxiliary heat call is made.
Hot water tank maintenance includes periodically
The desuperheater can be enabled or disabled
opening the drain on the hot water tank to
with a dipswitch on the control board. Refer to
remove deposits. If hard water, scale, or buildup
Control Section.
WARNING–
causes regular problems in hot water tanks in
The
desuperheater
your area, it may result in a loss of desuperheater
high
temperature cutout switch is located on the return
effectiveness. Cleaning may be required.
line from the water heater and is wired in series
CAUTION – Insulated copper tubing must be
used to run from the water tank to the
desuperheater connections on the side of the unit.
Desuperheater must be plumbed in copper
tubing.
with the desuperheater pump to disable it from
circulating at entering water temperatures above
140°F.
If
tank
temperatures
become
uncomfortably hot, move this switch to the
leaving water line, which will reduce the tank
The built-in desuperheater pump can provide the
proper flow to the desuperheater if the total
equivalent length of straight pipe and connections
is kept to a maximum of 90 feet of 1/2-inch type L
copper tubing (or a combination of approximately
60 feet with typical elbows and fittings). This
tubing can be connected to the water tank in two
ways:
maximum temperatures 10°F to 15°F.
CAUTION– Running desuperheater pump
without water flow will damage the pump. A
fuse is attached to the fuse holder and must be
inserted
in
the
fuse
holder
after
the
desuperheater is purged and operational.
Important – Do not insert the fuse until water
flow is available and the desuperheater is
METHOD 1
completely purged of air, or the pump may be
Using a desuperheater tee installed in the drain at the
14
bottom of the water heater This is the preferred
method for ease of installation, comfort and
efficiency. The tee eliminates the need to tap into
the domestic hot water lines and eliminates
household water supply temperature variations
that could occur from connecting to the hot water
pipes. Poor water quality may restrict the
effectiveness of the desuperheater tee by plugging
it with scale or buildup from the bottom of the
tank, restricting water flow.
METHOD 2
Taking water from the bottom drain and returning it
to the cold water supply line This method maintains
the same comfort and efficiency levels but
increases installation time and cost.
Important – This method requires a check valve
in the return line to the cold water supply to
prevent water from flowing backwards through
the desuperheater when the tank is filling. Water
passing through the pump backwards damages
the rotor's bearing, which reduces pump life and
causes noise problems in the pump. Note – A
spring-type check valve with a pressure-drop
rating of 1/2 psig or less is recommended.
15
IX. ENGINEERING SPECIFICATIONS
PERFORMANCE RATINGS
REC-V036 PERFORMANCE RATINGS
Heating Performance Data (Tested in accordance with ASHRAE/AHRI/ ISO Standard 13256-1)
Operating
Mode
Full Load
Part Load
Application
Source
EWT (°F)
Ground Water
50°F
Ground Loop
32°F *
Ground Water
50°F
Ground Loop
41°F
Entering GPM
(source)
Total Heat
Output (MBH)
CFM
COP
45,500
1100
4.0
39,300
1100
3.4
33,000
900
4.2
30,900
900
8
3.9
* Antifreeze required
Cooling Performance Data (Tested in accordance with ASHRAE/AHRI/ ISO Standard 13256-1)
Operating
Mode
Full Load
Application
Source
EWT (°F)
Ground Water
59°F
Ground Loop
77°F
Entering GPM
(source)
Total Cooling
Output (MBH)
CFM
EER
36,200
900
27.5
33,500
900
19.9
Total Heat
Output (MBH)
CFM
COP
56,500
1450
4.0
45,500
1350
3.6
41,000
1100
4.2
36,000
1040
8
Operating
Mode
Full Load
Part Load
Application
Source
EWT (°F)
Ground Water
50°F
Ground Loop
32°F *
Ground Water
50°F
Ground Loop
41°F
Entering GPM
(source)
10
3.7
Operating
Mode
Full Load
Application
Source
EWT (°F)
Ground Water
59°F
Ground Loop
77°F
Entering GPM
(source)
10
16
Total Cooling
Output (MBH)
CFM
EER
51,000
1100
26.4
47,000
1100
22
Operating
Mode
Full Load
Part Load
Application
Source
EWT (°F)
Ground Water
50°F
Ground Loop
32°F *
Ground Water
50°F
Ground Loop
41°F
Entering GPM
(source)
Total Heat
Output (MBH)
CFM
COP
59,000
1700
4.0
55,600
1700
3.5
50,500
1400
4.2
46,400
1400
12
3.7
Operating
Mode
Full Load
Application
Source
EWT (°F)
Ground Water
59°F
Ground Loop
77°F
Entering GPM
(source)
12
17
Total Cooling
Output (MBH)
CFM
EER
55,000
1400
25.3
53,800
1400
20.0
PERFORMANCE DATA
REC-V036 PART LOAD HEATING & COOLING PERFORMANCE DATA
Ground
Cooling
Heating
EAT 80.6°F DB & 66.2°F WB
EAT 68°F DB
EWT
Airflow Total Sensible
GPM dP psig dP ft
KW
°F
CFM Capacity Capacity
20
30
40*
50
60
70
80
90
100
110
120
EER
Suction Discharge
Pressure Pressure
Airflow
Total
Heat
CFM Capacity Extracted
KW
EER
Suction Discharge
Pressure Pressure
6
1.6
3.7
900
24.4
16.6
2.3
3.1
66
342
8
2.5
5.8
900
24.6
16.8
2.3
3.1
67
348
10
3.8
8.8
900
24.9
17.0
2.3
3.1
68
354
6
1.6
3.7
900
29.2
21.3
2.3
3.4
83
360
8
2.5
5.8
900
29.4
21.2
2.4
3.5
84
366
10
3.8
8.8
900
29.7
21.5
2.4
3.5
85
372
6
1.6
3.7
900
37.4
28.0
1.2
33.4
127
146
900
32.9
24.7
2.4
3.8
97
368
8
2.5
5.8
900
37.8
28.4
1.1
34.2
124
146
900
33.3
25.0
2.4
3.8
98
374
10
3.8
8.8
900
38.5
28.9
1.1
37.2
121
118
900
34.3
26.0
2.4
3.9
101
384
6
1.6
3.7
900
36.5
27.4
1.4
30.0
126
182
900
32.6
24.1
2.5
4.2
105
378
8
2.5
5.8
900
36.9
27.7
1.3
30.6
125
177
900
32.9
24.4
2.5
4.2
106
384
10
3.8
8.8
900
37.7
28.3
1.2
33.3
122
150
900
34.7
25.8
2.6
4.4
112
396
6
1.6
3.7
900
35.7
26.8
1.5
26.5
127
214
900
36.7
27.8
2.6
4.6
122
396
8
2.5
5.8
900
36.1
27.1
1.4
27.1
126
209
900
36.9
28.1
2.6
4.6
123
402
10
3.8
8.8
900
36.8
27.6
1.4
29.5
122
182
900
38.9
30.1
2.6
4.7
128
414
6
1.6
3.7
900
46.6
34.9
1.9
19.3
127
241
900
40.6
31.7
2.6
4.9
137
414
8
2.5
5.8
900
47.0
35.3
1.8
19.7
126
237
900
41.1
31.9
2.7
5.0
138
420
10
3.8
8.8
900
48.0
36.0
1.7
21.4
122
209
900
44.1
34.9
2.7
5.1
143
432
6
1.6
3.7
900
46.4
34.8
1.9
17.8
125
246
900
45.0
35.2
2.9
5.5
152
459
46.9
35.2
1.9
18.2
124
241
900
45.5
35.4
3.0
5.6
153
466
900
48.9
38.7
3.0
5.7
159
479
Operation Not Recommended
8
2.5
5.8
900
10
3.8
8.8
900
47.3
35.5
1.9
18.6
123
237
6
1.6
3.7
900
45.2
33.9
2.1
14.6
126
278
8
2.5
5.8
900
45.7
34.3
2.1
15.0
125
273
10
3.8
8.8
900
46.2
34.7
2.1
15.3
124
268
6
1.6
3.7
8
2.5
5.8
10
3.8
8.8
6
1.6
3.7
8
2.5
5.8
10
3.8
8.8
6
1.6
3.7
8
2.5
5.8
10
3.8
8.8
* Operation at 40° EWT for long periods of time in Cooling is not recommended, this is an extreme operating condition.
Data subject to change.
Pressure: Suction +/- 5 psig & Discharge P +/- 10 psig.
Pressure Drops with pure water.
18
REC-V036 FULL LOAD HEATING & COOLING PERFORMANCE DATA
Heating
Ground
EAT 68°F DB
EWT
GPM dP psig dP ft
°F
20
30
40*
50
60
70
80
90
100
110
120
Airflow
CFM
Total
Capacity
Heat
Extracted
KW
EER
Suction
Pressure
Discharge
Pressure
6
1.6
3.7
1100
33.4
22.4
3.2
3.3
67
330
8
2.5
5.8
1100
33.8
22.8
3.2
3.3
68
336
10
3.8
8.8
1100
34.1
23.1
3.2
3.3
69
342
6
1.6
3.7
1100
39.6
28.0
3.4
3.6
82
359
8
2.5
5.8
1100
40.0
28.4
3.4
3.6
83
365
10
3.8
8.8
1100
41.5
30.5
3.2
3.8
85
423
6
1.6
3.7
1100
40.3
28.7
3.4
3.6
84
371
8
2.5
5.8
1100
44.5
32.4
3.5
3.8
94
365
10
3.8
8.8
1100
45.0
32.9
3.5
3.9
95
371
6
1.6
3.7
1100
45.1
32.1
3.8
4.0
111
419
8
2.5
5.8
1100
45.5
32.5
3.8
4.0
112
426
10
3.8
8.8
1100
48.0
34.7
3.9
4.1
120
472
6
1.6
3.7
1100
50.4
36.8
4.0
4.3
127
452
8
2.5
5.8
1100
50.9
37.3
4.0
4.3
128
459
10
3.8
8.8
1100
53.7
39.7
4.1
4.4
136
505
6
1.6
3.7
1100
55.7
41.8
4.1
4.6
143
478
8
2.5
5.8
1100
56.3
42.0
4.2
4.6
144
485
10
3.8
8.8
1100
60.3
45.6
4.3
4.8
152
531
6
1.6
3.7
1100
63.3
47.4
4.6
5.2
163
543
8
2.5
5.8
1100
63.9
47.7
4.8
5.2
164
550
10
3.8
8.8
1100
68.4
51.8
4.9
5.5
172
602
6
8
1.6
2.5
3.7
5.8
10
3.8
8.8
6
1.6
3.7
8
2.5
5.8
10
3.8
8.8
6
1.6
3.7
8
2.5
5.8
10
3.8
8.8
6
1.6
3.7
8
2.5
5.8
10
3.8
8.8
19
Ground
Cooling
Heating
EAT 80.6°F DB & 66.2°F WB
EAT 68°F DB
EWT
GPM dP psig dP ft
KW
°F
20
30
40*
50
60
70
80
90
100
110
120
8
10
12
8
10
12
8
10
12
8
10
12
8
10
12
8
10
12
8
10
12
8
10
12
8
10
12
8
10
12
8
10
12
2.0
3.8
5.3
2.0
3.8
5.3
2.0
3.8
5.3
2.0
3.8
5.3
2.0
3.8
5.3
2.0
3.8
5.3
2.0
3.8
5.3
2.0
3.8
5.3
2.0
3.8
5.3
2.0
3.8
5.3
2.0
3.8
5.3
4.6
8.8
12.2
4.6
8.8
12.2
4.6
8.8
12.2
4.6
8.8
12.2
4.6
8.8
12.2
4.6
8.8
12.2
4.6
8.8
12.2
4.6
8.8
12.2
4.6
8.8
12.2
4.6
8.8
12.2
4.6
8.8
12.2
EER
Suction Discharge
Pressure Pressure
1100
1100
1100
1100
1100
1100
1100
1100
1100
1100
1100
1100
1100
1100
1100
1100
1100
1100
49.8
52.8
53.9
47.7
50.6
51.6
45.6
48.4
49.3
43.5
46.1
47.0
41.4
43.9
44.7
39.3
41.7
42.5
38.2
40.3
40.4
36.6
38.6
38.7
34.9
36.9
37.0
29.3
30.8
30.9
31.7
33.5
33.6
30.1
31.7
31.9
1.6
1.5
1.5
1.8
1.8
1.7
2.0
2.0
1.9
2.3
2.2
2.1
2.5
2.4
2.3
2.7
2.6
2.5
31.9
32.9
33.8
28.8
29.8
30.6
25.8
26.7
27.4
22.8
23.5
24.2
19.8
20.4
21.0
16.7
17.3
17.8
141
136
134
139
134
132
137
132
130
135
130
128
133
128
126
131
126
124
185
178
170
210
202
193
235
226
216
260
250
239
285
274
262
310
298
285
Airflow
Total
Heat
1100
1100
1100
1100
1100
1100
1100
1100
1100
1100
1100
1100
1100
1100
1100
1100
1100
1100
1100
1100
1100
30.8
31.2
31.5
36.6
36.9
37.3
41.3
36.0
42.9
40.6
41.0
42.7
45.5
45.9
47.8
50.2
50.7
52.9
55.5
56.1
58.4
21.6
22.0
22.3
26.7
26.7
27.1
30.6
25.1
32.0
29.9
30.1
31.8
35.4
35.8
37.4
39.6
39.8
42.0
44.5
44.8
47.2
KW
EER
2.7
2.7
2.7
2.9
3.0
3.0
3.1
3.2
3.2
3.1
3.2
3.2
2.9
2.9
3.0
3.1
3.2
3.2
3.2
3.3
3.3
2.6
2.6
2.6
2.8
2.9
2.9
3.6
3.6
3.7
3.8
3.9
4.0
4.1
4.2
4.3
4.4
4.5
4.6
5.0
5.1
5.2
Suction Discharge
Pressure Pressure
68
69
70
89
90
91
109
110
113
118
119
124
137
139
144
158
159
164
188
189
195
308
313
319
330
336
338
344
353
359
358
364
370
375
381
386
398
403
409
419
424
430
20
Heating
Ground
EAT 68°F DB
EWT
GPM dP psig dP ft
°F
20
30
40*
50
60
70
80
90
100
110
120
Airflow
CFM
Total
Capacity
Heat
Extracted
KW
EER
Suction
Pressure
Discharge
Pressure
8
2.0
4.6
1400
38.8
27.2
3.9
3.3
66
308
10
3.8
8.8
1400
39.4
27.8
3.7
3.4
67
304
12
5.3
12.2
1400
39.8
28.1
3.8
3.3
69
312
8
2.0
4.6
1400
44.7
30.5
4.2
3.5
78
336
10
3.8
8.8
1400
45.4
31.7
4.0
3.5
80
331
12
5.3
12.2
1400
45.9
31.8
4.1
3.5
82
340
8
2.0
4.6
1400
50.7
35.4
4.5
3.6
91
364
10
3.8
8.8
1400
51.5
36.7
4.3
3.7
92
359
12
5.3
12.2
1400
52.1
36.9
4.4
3.6
96
368
8
2.0
4.6
1400
56.7
40.3
4.8
3.8
104
391
10
3.8
8.8
1400
57.5
41.8
4.6
3.8
105
386
12
5.3
12.2
1400
58.2
42.0
4.7
3.8
109
396
8
2.0
4.6
1400
63.3
49.0
5.0
3.9
120
430
10
3.8
8.8
1400
64.3
49.5
5.0
3.9
122
424
12
5.3
12.2
1400
65.0
50.1
5.2
3.8
126
435
8
2.0
4.6
1400
68.6
50.1
5.4
4.1
129
447
10
3.8
8.8
1400
69.7
51.9
5.2
4.2
131
441
12
5.3
12.2
8
2.0
4.6
1400
1400
70.4
74.5
52.2
55.0
5.3
5.7
4.1
4.3
135
141
452
474
10
3.8
8.8
1400
75.7
56.9
5.5
4.3
144
468
12
5.3
12.2
1400
76.6
57.3
5.7
4.2
149
480
8
10
2.0
3.8
4.6
8.8
12
5.3
12.2
8
2.0
4.6
10
3.8
8.8
12
5.3
12.2
8
2.0
4.6
10
3.8
8.8
12
5.3
12.2
4.6
8
2.0
10
3.8
8.8
12
5.3
12.2
21
Ground
Cooling
Heating
EAT 80.6°F DB & 66.2°F WB
EAT 68°F DB
EWT
GPM dP psig dP ft
KW
°F
20
30
40*
50
60
70
80
90
100
110
120
8
10
12
8
10
12
8
10
12
8
10
12
8
10
12
8
10
12
8
10
12
8
10
12
8
10
12
8
10
12
8
10
12
2.0
3.8
5.3
2.0
3.8
5.3
2.0
3.8
5.3
2.0
3.8
5.3
2.0
3.8
5.3
2.0
3.8
5.3
2.0
3.8
5.3
2.0
3.8
5.3
2.0
3.8
5.3
2.0
3.8
5.3
2.0
3.8
5.3
4.6
8.8
12.2
4.6
8.8
12.2
4.6
8.8
12.2
4.6
8.8
12.2
4.6
8.8
12.2
4.6
8.8
12.2
4.6
8.8
12.2
4.6
8.8
12.2
4.6
8.8
12.2
4.6
8.8
12.2
4.6
8.8
12.2
EER
Suction Discharge
Pressure Pressure
1400
1400
1400
1400
1400
1400
1400
1400
1400
1400
1400
1400
1400
1400
1400
1400
1400
1400
35.8
36.4
37.1
41.2
41.9
42.7
46.7
47.4
48.3
53.2
54.0
55.1
57.5
58.4
59.6
39.3
41.7
42.5
26.2
27.7
27.8
30.2
31.9
32.0
34.2
36.1
36.2
36.2
38.0
38.2
42.1
44.4
44.7
30.1
31.7
31.9
2.0
1.9
1.8
2.2
2.1
2.0
2.4
2.3
2.2
2.6
2.4
2.3
2.9
2.7
2.6
2.7
2.6
2.5
19.7
20.7
21.1
20.3
21.3
21.8
20.9
22.0
22.4
22.0
23.1
23.6
22.1
23.2
23.7
16.7
17.3
17.8
104
96
89
116
108
99
128
119
110
130
120
111
152
141
130
131
126
124
154
147
137
185
177
165
216
206
192
230
220
205
277
265
247
310
298
285
Airflow
Total
Heat
1400
1400
1400
1400
1400
1400
1400
1400
1400
1400
1400
1400
1400
1400
1400
1400
1400
1400
1400
1400
1400
44.7
45.2
45.7
48.4
48.9
49.4
52.4
52.8
52.8
55.5
56.0
55.5
59.2
59.7
59.2
62.8
63.4
62.8
67.2
67.8
67.2
30.5
31.1
31.5
33.5
34.0
34.5
37.3
37.7
37.2
37.0
37.5
35.4
41.5
42.0
40.3
44.2
44.9
42.6
47.6
48.2
45.9
KW
EER
4.1
4.1
4.1
4.4
4.4
4.4
4.4
4.4
4.6
5.4
5.4
5.9
5.2
5.2
5.5
5.4
5.4
5.9
5.7
5.7
6.2
3.4
3.5
3.5
3.5
3.5
3.6
3.6
3.7
3.7
3.4
3.4
3.3
3.5
3.5
3.4
3.5
3.6
3.4
3.6
3.6
3.5
Suction Discharge
Pressure Pressure
79
80
81
86
87
88
94
95
97
101
102
105
110
111
114
118
119
122
127
129
133
278
282
287
297
301
306
316
321
325
352
357
362
372
377
382
397
402
407
427
432
438
22
Heating
Ground
EAT 68°F DB
EWT
GPM dP psig dP ft
°F
20
30
40*
50
60
70
80
90
100
110
120
Airflow
CFM
Total
Capacity
Heat
Extracted
KW
EER
Suction
Pressure
Discharge
Pressure
8
2.0
4.6
1700
32.8
27.4
3.3
3.2
66
282
10
3.8
8.8
1700
33.4
27.9
3.3
3.2
67
283
12
5.3
12.2
1700
34.0
28.1
3.4
3.2
69
287
8
2.0
4.6
1700
37.8
25.9
3.5
3.4
78
306
10
3.8
8.8
1700
38.5
26.5
3.5
3.4
79
307
12
5.3
12.2
1700
39.3
27.1
3.6
3.4
81
311
8
2.0
4.6
1700
42.9
30.2
3.7
3.6
89
329
10
3.8
8.8
1700
43.7
30.9
3.7
3.6
91
331
12
5.3
12.2
1700
44.5
31.6
3.8
3.6
93
336
8
2.0
4.6
1700
48.0
34.6
3.9
3.8
101
353
10
3.8
8.8
1700
48.9
35.4
4.0
3.8
102
355
12
5.3
12.2
1700
49.8
36.2
4.0
3.8
105
360
8
2.0
4.6
1700
54.0
41.0
4.2
4.0
115
382
10
3.8
8.8
1700
55.0
41.5
4.2
4.1
117
384
12
5.3
12.2
1700
56.0
41.8
4.2
4.2
120
389
8
2.0
4.6
1700
58.1
43.3
4.3
4.2
124
401
10
3.8
8.8
1700
59.2
44.3
4.4
4.3
126
403
12
5.3
12.2
8
2.0
4.6
1700
1700
60.3
63.2
45.2
47.7
4.4
4.5
4.3
4.4
129
135
408
425
10
3.8
8.8
1700
64.3
48.7
4.6
4.5
137
427
12
5.3
12.2
1700
65.5
49.8
4.6
4.5
141
433
8
10
2.0
3.8
4.6
8.8
12
5.3
12.2
8
2.0
4.6
10
3.8
8.8
12
5.3
12.2
8
2.0
4.6
10
3.8
8.8
12
5.3
12.2
4.6
8
2.0
10
3.8
8.8
12
5.3
12.2
23
PHYSICAL DATA
Nominal Rated CFM
Air Coil Face Area (ft2)
Tube O.D.
Fins per Inch
Coil Rows
Filter Height and Width 1" Thick
ECM Blower Motor HP
ECM Blower Wheel Size
Source Connections
DSH/DHW (in) Connections
RGS-036
RGS-048
RGS-060
1100
4.2
7/8 OD
14 FPI
4
21 5/8” x 29”
¾
10” x 8”
1” FPT
1” FPT
1400
5.3
7/8 OD
14 FPI
5
26 5/8” x 29”
¾
10” X 8”
1” FPT
1” FPT
1700
5.3
7/8 OD
14 FPI
6
26 5/8” x 29”
1
10” X 8”
1” FPT
1” FPT
UNIT DIMENSIONS
Measurement in Inches
Dimension
3 Ton
4-5 Ton
Height
53.1
53.1
Width
27.0
27.0
Depth
31.1
31.1
A
12.0
12.0
B
10.25
10.25
C
0.6
0.6
E
21.9
26.9
F
1.3
1.3
G
28.5
28.5
I
7.0
7.0
Water Inlets
1.0 FPT
1.0 FPT
Water Outlets
1.0 FPT
1.0 FPT
Cond. Drain
1.0 FPT
1.0 FPT
Filter Size
21 5/8” x 29”
26 5/8” x 29”
24
ELECTRICAL DATA
BLOWER PERFORMANCE
ECM BLOWER DATA
Model
RE*-V036
RE*-V048
RE*-V060
Speed Tap
G Only
C1
B
C1
B
C1
B
450
525
600
700
750
850
Full Load Heating
& Cooling
1100
1200
1400
1600
1700
1900
When part load is available CFM will be 76% of the full load rating.
Using the +/- Jumpers will result in + or - 10% of the ratings.
Test at .6 Static
1
Indicates Factory Setting.
25
Part Load
Auxiliary Heat
900
925
1100
1250
1400
1550
1200
1300
1600
1800
1900
2100
WATER COIL PRESSURE DROP RATINGS
Pressure drops (PSI) with pure water.
REC-V036
GPM Water Flow
6
7
8
9
10
11
12
13
14
15
Source Water Pressure Drop
1.6
2.0
2.5
3.1
3.8
4.3
4.8
6.0
7.5
9.4
REC-V048
GPM Water Flow
10
11
12
13
14
16
17
3.8
4.6
5.3
6.1
7.0
9.0
10.2
REC-V060
GPM Water Flow
10
11
12
13
14
15
16
17
18
2.3
2.8
3.3
3.8
4.3
4.9
5.6
6.3
7.0
26
X. FIGURE
FIGURE 1 – GROUND LOOP WATER PLUMBING
IN
Pressure/Temperature
(P/T) Ports
Out
PumpPAK
To/From
Closed Loop
FIGURE 2 – GROUND WATER PLUMBING
From Bladder-Type
Pressure Tank
Shutoff
Valves
Boiler
Drains
Strainer
IN
Visual Flow
Meter
Solenoid
Valve
Flow Control
Valve
Out
Discharge
27
Pressure/Temperature
(P/T) Ports
FIGURE 3 – PREFERRED DESUPERHEATER INSTALLATION
COLD
HOT
1/2" or 3/4"
Copper Pipe
Air Vent
1/2" Copper Pipe
Desuperheater Tee
Shutoff Valves
Drain (Hang Down)

Note – Always use copper pipe. Check local codes and use proper plumbing procedures.
FIGURE 4 – ALTERNATE DESUPERHEATER INSTALLATION
Note – Always use copper pipe. Check local codes and use proper plumbing procedures.
28
XI. TROUBLESHOOTING
If the heat pump goes into lockout on a high or low pressure switch or discharge refrigerant temperature,
the cause of the lockout can be narrowed down by knowing the operating mode and which switch the unit
locked out on. The following table will help track down the problem once this information is known.
Important – A lockout condition is a result of the heat pump shutting off to protect itself.
Never bypass
the lockout circuit. Serious damage can be caused by the system operating without lockout protection.
29
INICATOR LIGHTS
CONDITION
AC Power Applied
MODES
PWR
HTG
CLG
LOCKOUTS
DHW FRZ
LP
HP
OFLW
DGT
Off
Off
Off
Off
Off
Power removed or incorrect voltage.
Off
Off
Off
Off
Off
Random start up time between 30-90 seconds
on power initialization.
Off
AC Power Applied Blink
AC Power Applied
X
Blink
Blink
COMMENTS
Power applied - unit running or waiting for a
call to run.
Blink
FREEZE INDICATOR
Thermostat
Heating Mode
X
X
-
X
-
Cooling Mode
X
X
X
-
Loss/lack of flow through ground side
heat exchanger.
Low fluid temperature operation in
ground heat exchanger.
Freezing fluid in ground side heat
exchanger (lack of antifreeze)
heat exchanger.
ground heat exchanger.
LOW PRESSURE INDICATOR
Thermostat
Heating Mode
X
X
-
X
-
Cooling Mode
X
X
X
-
30
heat exchanger.
ground side heat exchanger.
Freezing fluid in ground side heat
exchanger (lack of antifreeze)
Dirty ground side heat exchanger (on
ground water systems)
Low ambient temperature at the heat
pump.
Undercharged/ overcharged
refrigerant circuit.
Expansion valve/sensing bulb
malfunction.
Low ambient temperature at the heat
pump.
Undercharged/overcharged
refrigerant circuit.
malfunction.
Excessively low fluid temperature in
the ground side heat exchanger.
HIGH PRESSURE INDICATOR
Thermostat
Heating Mode
X
X
-
X
Cooling Mode
X
X
X
-
Check if High Pressure switch is open.
Check electrical connections between
High Pressure switch and Controller.
Loss/lack of flow through the groundside heat exchanger.
High fluid temperature in the groundside heat exchanger.
Dirty ground-side heat exchanger.(on
ground water system).
Overcharged refrigerant circuit.
malfunction.
OVERFLOW INDICATOR
Thermostat
Heating or
Cooling Mode
X
X
X
X
-
Drain pan is filled with water.
Overflow sensor has a short.
-
Significantly low flow through
ground-side heat exchanger.
Below minimum ground
temperatures.
Significantly undercharged refrigerant
circuit.
Significantly low flow through
ground-side heat exchanger.
Above maximum ground
temperatures.
Significantly undercharged refrigerant
circuit.
DISCHARGE REFRIGERANT TEMPERATURE INDICATOR (DGT)
Thermostat
Heating Mode
X
X
X
-
Cooling Mode
X
X
X
-
PROBLEM
CHECKS AND CORRECTIONS
POSSIBLE CAUSE
Tripped Breaker
Reset circuit breaker (check for correct size).
Broken or Loose Wires
Replace or tighten the wires.
Voltage Supply Low
If voltage is below minimum voltage on data plate, contact power company.
Low Voltage Circuit
Check 24-volt transformer for burnout, blown fuse or voltage less than 18 V.
Entire unit
Room Thermostat
does not run
Set system to "Cool" and lowest temperature setting, unit should run. Set system to
"Heat" and highest temperature setting, unit should run. If unit does not run in either
case, the room thermostat could be faulty or incorrectly wired. To check, disconnect
thermostat wires at the unit and jumper between "R", "Y1" and "G" terminals, and unit
should run. Only replace with correct replacement. A substitute may not work
properly.
Interruptible Power
Check incoming supply voltage.
Water
Lack of sufficient pressure, flow, temperature and/or quantity of water.
Unit Undersized
Recalculate heat gains or losses for space to be conditioned. If excessive, rectify by
adding insulation, shading, etc.
31
PROBLEM
POSSIBLE CAUSE
Loss of Conditioned Air by
Leaks
Check for ductwork leaks or introduction of ambient air through doors and windows.
Thermostat
Improperly located thermostat (e.g. near kitchen inaccurately sensing comfort level in
living areas). If thermostat has anticipator, set at 1.0 or 1.2.
Airflow (Across fan coil)
Lack of adequate airflow or improper distribution of air. Check the motor speed and
duct sizing. Check the filter, it should be inspected every month and changed if dirty.
Remove or add resistance accordingly.
Refrigerant Charge
Low on refrigerant charge causing inefficient operation. Adjust only after checking
CFM, GPM and inlet/outlet temperatures.
Insufficient Compressor
cooling or
heating
Reversing Valve
Desuperheater
Check for defective compressor. If discharge pressure is too low and suction pressure
too high, compressor is not pumping properly. Replace compressor.
Defective reversing valve creating bypass of refrigerant from discharge to suction side
of compressor. When necessary to replace reversing valve, wrap with wet cloth &
direct heat away. Excessive heat can damage the valve.
The desuperheater could be disabled with dipswitch setting during cold weather to
allow full heating load to house.
High Pressure or Low Pressure Unit could be off on high pressure, low-pressure or discharge refrigerant temp cutout.
Switch or Discharge Refrigerant Check water GPM & temps, ambient temperature & loss of refrigerant. If unit still
Temp Switch
fails to run, check for faulty switches or wiring.
Loss of Conditioned Air by
Leaks
Check for leaks in ductwork or introduction of ambient air through doors/windows.
Wiring
Check for loose or broken wires at compressor, capacitor, or contactor.
Defective Capacitor
Check capacitor, if defective remove, replace, and rewire correctly.
Voltage Supply Low
If voltage is below minimum voltage specified on the data plate, contact local power
company. Check voltage at compressor for possible open terminal.
Low Voltage Circuit
Check 24-volt transformer for burn out or voltage less that 18 volts.
Compressor Overload Open
In all cases an "internal" compressor overload is used. If the compressor motor is too
hot, the overload will not reset until the compressor cools down. If the compressor is
cool and the overload does not reset, there may be a defective or open overload.
Replace the compressor.
Compressor
short cycles. Compressor Motor Shorted to
Ground
Internal winding grounded to the compressor shell. Replace the compressor. If
compressor burnout replace the liquid line filter/drier.
Compressor Windings Open
Check continuity of the compressor windings with an ohmmeter. If the windings are
open, replace the compressor.
Seized Compressor
Try an auxiliary capacitor in parallel with the run capacitor momentarily. If the
compressor still does not start, replace it.
Room Thermostat
Improperly located thermostat (e.g. near kitchen, inaccurately sensing comfort level in
living areas). If thermostat has an anticipator, set at 1.0 or 1.2.
Compressor Overload
Defective compressor overload, check and replace if necessary. If the compressor runs
too hot, it may be due to insufficient refrigerant charge.
Wiring and Controls
Loose wiring connections, or control contactor defective.
32
PROBLEM
Unit short
cycles
Thermostat Improperly Set
Is it below room temperature? Check the thermostat setting.
Defective Thermostat
Check thermostat operation. Replace if found defective.
Incorrect Wiring
Check for broken, loose, or incorrect wires.
Dirty Air Filter
Check Filter, Clean or replace if found dirty.
Room Thermostat
Ensure that these products are properly configured according to their own
instructions for the “System Type” they are installed on.
Reversing Valve doesn’t Shift
Defective solenoid valve will not energize. Replace solenoid coil.
Unit will not
Reversing Valve does not Shift,
run in
'Heating' the Valve is Stuck
-
Solenoid valve is de-energized due to miswiring at the unit or remote control correct wiring.
Replace if valve is tight or frozen and will not move.
Switch from heating to cooling a few times to loosen valve.
Insufficient Antifreeze
Check antifreeze level and add antifreeze to obtain correct freeze protection.
Compressor
Make sure compressor is not in direct contact with base or sides of cabinet. Cold
surroundings can cause liquid slugging, increase ambient temp.
Blower Motor Defective
Refer to Blower Motor Trouble Shooting. If it does not operate the compressor will go
off on high head pressure.
Dirty Air Filter
Check filter. Clean or replace if found dirty.
Evaporator Airflow
(air coil) ices
over in
cooling
mode
Blower Speed Set Too Low
Unit does
not cool
(Heats Only)
POSSIBLE CAUSE
duct sizing. Check the filter, it should be inspected every month and changed if dirty.
Check for closed registers. Remove or add resistance accordingly.
Verify blower speed jumpers are in factory settings.
Low Air Temperature
Room temperatures below 65F may ice over the evaporator.
Reversing Valve does not Shift
Defective solenoid valve will not energize. Replace solenoid coil.
Room Thermostat
Ensure that it is properly configured according to their own instructions for the
'System Type' they are installed on.
33
PROBLEM
Noisy
Operation
POSSIBLE CAUSE
Contactor
A "clattering" or "humming" noise in the contactor could be due to control voltage less
than 18 volts. Check for low supply voltage, low transformer output or extra long
runs of thermostat wires. If the contactor contacts are pitted or corroded or coil is
defective, repair or replace.
Rattles and Vibrations
Check for loose screws, panels, or internal components. Tighten and secure. Copper
piping could be hitting the metal surfaces. Carefully readjust by bending slightly.
Ensure hard plumbing is isolated from building structures.
Water and Airborne Noises
Excessive water through water-cooled heat exchanger will cause squealing sound.
Ensure adequate flow for good operation but eliminating the noise.
Cavitating Pumps
Purge air from ground loop.
Squealing Sound from Inside
the Cabinet
Purge air from the water side of the desuperheater heat exchanger or defective
desuperheater heat exchanger.
Blower and Blower Motor
Blower wheel hitting the casing, adjust for clearance and alignment. Bent blower,
check and replace if damaged. Loose blower wheel on shaft, check and tighten.
Compressor
Make sure the compressor is not in direct contact with the base or side of the cabinet.
Cold surroundings can cause liquid slugging, increase ambient temperature.
Condensate Drain Line Kinked
or Plugged
Clean condensate drain. Make sure external condensate drain is installed with
adequate drop and pitch.
Unit not Level
Level vertical units.
Reversing Valve
Defective reversing valve creating bypass of refrigerant from discharge to suction side
of compressor. When it is necessary to replace the reversing valve, wrap it with a wet
cloth and direct the heat away. Excessive heat can damage the valve.
Desuperheater
The desuperheater circuit (in-line) fuse should be disconnected during cold weather
to allow full heating load to house.
Refrigerant Charge
Airflow
Low on refrigerant charge causing inefficient operation. Adjust only after checking
CFM, GPM, and inlet/outlet temperatures.
duct sizing. Check the filter, it should be inspected every month and cleaned if dirty.
Remove or add resistance accordingly.
34
ECM Motor
PROBLEM
Motor rocks slightly when starting
Motor won’t start
•No movement
This is normal start-up for ECM
Wait for completion of ramp-up at start
Check power at motor
Check low voltage (24 VAC R to X) at motor
Check low voltage connections (G, Y, W2, R, X) at motor
Check for unseated pins in connectors on motor harness
Test with a temporary jumper between R and G
Check motor for a tight shaft
Perform Moisture Check*
Motor rocks, but won’t start
Check for loose or compliant motor mount
Make sure blower wheel is tight on shaft
Motor starts, but runs erratically
•Varies up and down or intermittent
Check line voltage for variation or “sag”
Check low voltage connections (G, Y, W2, R, X) at motor, unseated pins in motor harness
connectors
Check out system controls, thermostat
Perform Moisture Check*
”Hunts” or “puffs” at high CFM (speed)
Does removing panel or filter reduce puffing?
Reduce restriction
Stays at low CFM despite call for higher
speed
Check low voltage wires and connections
Verify fan is not in delay mode; wait until delay complete
”R” missing/not connected at motor
Stays at high CFM
Blower won’t change CFM after adjusting
the speed control setting.
Power to the unit must be reset to enable the new settings
Blower won’t shut off
Current leakage from controls into G, Y, or W?
Excessive noise
Determine if it’s air noise, cabinet, duct or motor noise
High static creating high blower speed?
Air noise
Does removing filter cause blower to slow down? Check filter
Use low-pressure drop filter
Check/correct duct restrictions
Noisy blower or cabinet
Check for loose blower housing, panels, etc.
High static creating high blower speed?
Check for air whistling through seams in ducts, cabinets, or panels
Check for cabinet/duct deformation\
Moisture Check
Connectors are oriented as recommended by equipment manufacturer.
Is condensate drain plugged?
Check for low airflow (too much latent capacity)
Check for undercharged conditions
Check for plug leaks in return ducts, cabinet
35
ECM Motor
PROBLEM
Comfort Check
Check proper airflow settings.
Low static pressure for low noise.
Set low continuous-fan CFM.
Thermostat in good location?
For further technical support contact Enertech 618-664-5860.
36
XII.
WIRING DIAGRAM
STANDARD MODELS WITH OPTIONAL DESUPERHEATER
Blower Motor
(ECM)
Optional Slide
In Heater
5 4 3 2 1
X
8 7 6 5 4 3 2 1
W2 E
BLK 3
WHT 2
16 15 14 13 12 11 10 9
GRN 1
WHT 6
WHT 7
WHT 13
BLK 5
Connect
ORG wire to
WHT 13 for
230V
Operation
TO LOOP
PUMP 1
BLK 5
WHT 8
P1
TO LOOP
PUMP 2
(OPTIONAL)
P2
DSH
RED
BLK 12
ORG
BLK
C 208 240
BLK 43
TRANSFORMER
WHT 6
WHT 8
WHT 11
BLK 15
WHT 7
User Interface
Membrane
BLU 41
BLU 19
ORG 18
ORG 40
RED 14
DSH
Relay
(Optional)
P2
Relay
P1
Relay
BLU 17
BLU 4
EQUIPMENT
GROUND
YEL 20
WHT 11
ORG 16
Power Supply
208/240 VAC
50/60 Hz
BLU
YEL
WHT 51
COMPRESSOR
RUN
CAPACITOR
BLK 12
WHT 13
RED 42
TO DHW
PUMP
BLK, CMPR C
RED, CMPR R
BLU, CMPR S
Thermostat Inputs
RED 42
GeoSystems
CONTROL BOARD
Y1
Y2
W1
W2
G
O
R
C
A
B
FUSE
LLTH
FRZ
HDGT
OFD
LPLO
HPLO
DHW
COOL
HEAT
PWR
BLK 43
USB
YEL 20
OFD
(N/A for REC Models)
BLU 21
YEL
BLU
BLK 27
HP
DLWT (optional)
SLT
EWT
LLTC
DEWT (optional)
LWT
DGT
R_IN
COM
R_RLY
C_RLY
2
1
3
1
2
DSH
2
4
1
3
P1
P2
GP
2
1
JP801
BLK 26
BLU 25
LP
OFD
PWM
DEH
BLU
37
Y2
C
S
Y1
RVR
G
BLU
R
BLK
W1
COMPRESSOR
HP
W2
ORG 22
BLU 23
LP
PWM_S
PWM_C
ADJ
COOL
DLY
HEAT
RVR
BLU
FLW
3
BLU 24
RED
Thermistor/ Sensor Inputs
DSH PUMP
(Optional)
BATTERY
1 2 3 4 5 6 7 8
4
3
6
5
4
2
9 10 11 12 13 14 15 16
2
1
3
2
1
1
BLU 21
38
Greenville, IL & Mitchell, SD
[email protected]
www.gogogeo.com
040-00098 Rev. B | November 2012 | ©2012 Enertech Global, LLC. | All Rights Reserved
39

Forced Air - ECONAR Products

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