Nortek Q94RD Series User manual

13.4 SEER2
Single Package Heat Pump - Single Stage, R-410A
*Q94RD SERIES
INSTALLATION INSTRUCTIONS
IMPORTANT
ATTENTION INSTALLERS:
It is your responsibility to know this product better than your customer. This includes being
able to install the product according to strict safety guidelines and instructing the customer on
how to operate and maintain the equipment for the life of the product. Safety should always be
the deciding factor when installing this product and using common sense plays an important
role as well. Pay attention to all safety warnings and any other special notes highlighted in the
manual. Improper installation of the furnace or failure to follow safety warnings could result in
serious injury, death, or property damage.
These instructions are primarily intended to assist qualified individuals experienced in the
proper installation of this appliance. Some local codes require licensed installation/service
personnel for this type of equipment. Please read all instructions carefully before starting the
installation. Return these instructions to the customer’s package for future reference.
DO NOT DESTROY. PLEASE READ CAREFULLY & KEEP IN A SAFE PLACE FOR FUTURE REFERENCE.

2
TABLE OF CONTENTS
IMPORTANT SAFETY INFORMATION.....................3
REQUIREMENTS & CODES .....................................4
GENERAL INFORMATION........................................4
Before You Install this Unit.......................................4
Locating the Heat Pump..........................................4
Minimum Clearances...............................................4
Service Access Clearance:..................................4
Clearances to Combustibles: ...............................4
Air Duct System.......................................................5
HEAT PUMP INSTALLATION ...................................5
Unpacking the Unit..................................................5
Installing Return & Supply Air Collars (Optional) ....5
Supply Duct..........................................................5
Return Duct..........................................................6
Connecting Return & Supply Air Flexible Ducts ......6
Locating & Installing the Return Air Assembly ........6
Locating & Installing the Supply Damper(s) ............6
Condensate Drainage .............................................6
ELECTRICAL CONNECTIONS .................................7
Pre-Electrical Checklist ...........................................7
Line Voltage.............................................................7
Overcurrent Protection ............................................8
Grounding................................................................8
Thermostat / Low Voltage Connections...................8
Defrost Control Board Test Pins ..............................8
Clearing Defrost Board Fault Codes .......................8
Electric Heat Package (optional) .............................8
Outdoor Thermostat Options...................................8
HUD Outdoor Thermostat Option.........................8
2nd Stage Thermostat Option..............................8
Blower Speed ..........................................................8
Ambient Sensor Mounting.......................................9
STARTUP & ADJUSTMENTS ...................................9
Pre-Start Checklist ..................................................9
Start-Up Procedure .................................................9
Air Circulation.......................................................9
System Heating....................................................9
System Cooling....................................................9
Short Cycle Protection .........................................9
Emergency Heat ..................................................9
Forced Defrost Mode (Field Test) ............................10
Anti Short Cycle Timer Test .....................................10
Heating Mode.......................................................10
Cooling Mode.......................................................10
COMPONENT FUNCTIONS ......................................10
UNIT MAINTENANCE................................................10
REFRIGERANT CHARGING .....................................10
Charging the Unit in AC Mode.................................11
FIGURES & TABLES.................................................12
Figure 10. Unit Dimensions..................................12
Table 2. Physical Data..........................................12
Table 3. Heat Rise Data .......................................13
Wiring Diagrams......................................................14
Figure 11. W.D. for 2 & 2.5 Ton Models ................14
Figure 12. W.D. for 3, 3.5 & 4 Ton Models ............15
Figure 13. W.D. for 5 Ton Models..........................16
Figure 14. Typical Heat Pump Thermostat
Connections..........................................................17
INSTALLATION CHECKLIST....................................20

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IMPORTANT SAFETY INFORMATION
Please read all instructions before servicing this equipment.
Pay attention to all safety warnings and any other special notes
highlighted in the manual. Safety markings are used frequently
throughout this manual to designate a degree or level of
seriousness and should not be ignored. WARNING indicates a
potentially hazardous situation that if not avoided, could result
in personal injury or death. CAUTION indicates a potentially
hazardous situation that if not avoided, may result in minor or
moderate injury or property damage.
WARNING:
ELECTRICAL SHOCK, FIRE OR
EXPLOSION HAZARD
Failure to follow safety warnings exactly could
result in serious injury, death or property damage.
Improper servicing could result in dangerous
operation, serious injury, death or property
damage.
• Before servicing, disconnect all electrical power
to the indoor blower.
• When servicing controls, label all wires prior
to disconnecting. Reconnect wires correctly.
• Verify proper operation after servicing.
WARNING:
These units are fully charged with R-410A
refrigerant and ready for installation. When
a system is installed according to these
instructions, no refrigerant charging is required.
If repairs make it necessary for evacuation and
charging, it should only be attempted by qualified,
trained personnel thoroughly familiar with this
equipment. Some local codes require licensed
installation service personnel to service this
type of equipment. Under no circumstances
should the homeowner attempt to install and/or
service this equipment. Failure to comply with
this warning could result in equipment damage,
personal injury, or death.
WARNING:
Do not place combustible material on or against
the unit cabinet. Do not place combustible
materials, including gasoline and any other
flammable vapors and liquids, in the vicinity of
the unit.
CAUTION:
This unit uses R-410A refrigerant. DO NOT use
any other refrigerant in this unit. Use of another
refrigerant will damage the unit.
WARNING:
The information listed below and on the next
page must be followed during the installation,
service, and operation of this unit. Unqualified
individuals should not attempt to interpret these
instructions or install this equipment. Failure
to follow safety recommendations could result
in possible damage to the equipment, serious
personal injury or death.
• Before beginning the installation, verify that the unit model is
correct for the job. The unit model number is printed on the
data label.
• This equipment contains liquid and gaseous refrigerant
under high pressure. DO NOT USE ANY PORTION OF THE
CHARGE FOR PURGING OR LEAK TESTING. Installation
or servicing should only be performed by qualified trained
personnel thoroughly familiar with this type equipment.
• Installation of equipment may require brazing operations.
Installer must comply with safety codes and wear appropriate
safety equipment(safety glasses, workgloves, fire extinguisher,
etc.) when performing brazing operations.
• This unit is designed for outdoor installations only and should be
located in a position as shown on page 4. Unit dimensions
are shown in Figure 10 (page 12) & Table 2 (page 12).
• The installer should become familiar with the units wiring
diagram before making any electrical connections to the unit.
See the unit wiring label or Figure 11 (page 14), Figure 12
(page 15), & Figure 13 (page 16).
• Follow all precautions in the literature, on tags, and on labels
provided with the equipment. Read and thoroughly understand
the instructions provided with the equipment prior to performing
the installation and operational checkout of the equipment.
• Use caution when handling this appliance or removing
components. Personal injury can occur from sharp metal
edges present in all sheet metal constructed equipment.

4
area where they will be shaded from the afternoon sun, when
the heat load is greatest.
• Consideration should also be given to availability of electric
power, service access, noise, and shade.
• The length of the supply and return ducts should be kept to
a minimum with no sharp radius bends.
• Overhead obstructions, poorly ventilated areas, and areas
subject to accumulation of debris should be avoided. The
hot condenser air must be discharged up and away from the
home, and if possible, in a direction with the prevailing wind.
Do not place the unit in a confined space. See Figure 10 (page
12) for unit dimensions.
Minimum Clearances
Sufficient clearance for unobstructed airflow through the outdoor
coil must be maintained in order to achieve rated performance
(except on supply & return duct (rear) side). However, 36” inches
from blower access panel, electrical panel, and compressor
panel is highly recommended for servicing and maintenance.
For minimum clearances to obstructions, see Figure 1. DO
NOT install unit in a confined or recessed area that will allow
discharge air from the unit to re-circulate into the condenser air
inlet, through the coil.
Service Access Clearance:
Blower and electrical control access panels.............. 24”
Compressor compartment access panel................... 24”
Clearance from top of unit ........................................ 72”
Clearance around condenser coil area to
Wall or shrubs (excludes duct panel side) ................. 12”
Clearances to Combustibles:
Combustible base - wood or Class A, B, or C
roof covering material ................................................. 0”
Supply & return air ducts ............................................ 0”
Duct connection side .................................................. 0”
REQUIREMENTS & CODES
• All electrical wiring must be completed in accordance with
local, state & national codes and regulations and with the
National Electric Code (ANSI/NFPA 70) or in Canada the
Canadian Electric Code Part 1 CSA C.22.1.
• The installer must comply with all local codes and regulations
which govern the installation of this type of equipment.
Local codes and regulations take precedence over any
recommendations contained in these instructions. Consult
local building codes and the National Electrical Code (ANSI
CI) for special installation requirements.
• Air Ducts must be installed in accordance with the standards
of the National Fire Protection Association “Standards for
Installation of Air Conditioning and Ventilation Systems” (NFPA
90A), “Standard for Installation of Residence Type Warm Air
Heating and Air Conditioning Systems” (NFPA 90B), these
instructions, and all applicable local codes.
• Consult Table 3 (page 13), and the rating plate for the
proper circulating air flow and temperature rise. It is important
that the duct system be designed to provide the correct flow
rates and external pressure rise. An improperly designed
duct system can result in nuisance shutdowns, and comfort
or noise issues.
• This unit is designed for outdoor installations only and should
be positioned as described in Locating the Heat Pump.
GENERAL INFORMATION
This packaged heat pump is designed only for outdoor ground
level installations and can be readily connected to the high static
duct system of a home. This unit is completely assembled, wired,
and run tested at the factory. The only connections needed
for installation are the supply and return ducts, line voltage,
thermostat wiring and the condensate drain.
This unit has been tested for capacity and efficiency in accordance
with AHRI standards and will provide many years of safe and
dependable comfort, providing it is properly installed and
maintained. Use of components other than those specified may
invalidate AHRI certification, Code Agency Listing, and limited
warranty on the heat pump.
Before You Install this Unit
√The cooling load of the area to be conditioned must be
calculated and a system of the proper capacity selected. It is
recommended that the area to be conditioned be completely
insulated and vapor sealed.
√Check the electrical supply and verify the power supply is
adequate for unit operation. If there is any question concerning
the power supply, contact the local power company.
√All units are securely packed at the time of shipment and
upon arrival should be carefully inspected for damage prior
to installing the equipment at the job site. Verify coil fins are
straight. If necessary, comb fins to remove flattened or bent
fins. Claims for damage should be filed immediately with the
carrier.
√Please consult your dealer for maintenance information
and availability of maintenance contracts. Please read all
instructions before installing the unit.
Locating the Heat Pump
• Survey the job site to determine the best location for mounting
the outdoor unit. Select a solid, level position, preferably on
a concrete slab, slightly above the grade level, and parallel
to the home. If possible, select a site for the unit that is as
close as possible to the proposed return grille location. DO
NOT PLACE UNIT UNDER THE HOME.
• The unit should be located with consideration of minimizing
the length of the supply and return ducts with no sharp radius
bends. If practical, place the heat pump and its ducts in an
24"
12"
24"
72” CLEARANCE
FROM TOP
OF UNIT
0"
Rear (Duct) Side
Front Side
Figure 1. Minimum Unit Clearances

5
Air Duct System
Air ducts should be installed in accordance with the standards of
the National Fire Protection Association “Standard for Installation
of Air Conditioning and Ventilation Systems” (NFPA 90A),
“Standard for Installation of Residence Type Warm Air Heating
and Air Conditioning Systems” (NFPA 90B), these instructions,
and all applicable codes. NFPA publications are available by
writing to: National Fire Protection Association, Batterymarch
Park, Quincy, ME 02269 or visit www.NFPA.org on the web.
• Design the duct work according to methods described by the
Air Conditioning Contractors of America (ACCA).
• The supply duct system, including the number and type of
registers, will have much more effect on the performance of
the system than any other factor. The duct must be sufficiently
large to conduct an adequate amount of air to each register.
See Figure 2.
• Duct work should be attached directly to the unit flanges for
horizontal applications.
• For highly resistive duct systems it may be necessary to add
an additional return air duct and or supply to achieve maximum
performance and prevent coil icing and refrigerant flood back.
• The heat pump system will not cool or heat the home if
air is lost to the outside through leaks in the duct system
or poor installation. Ducts that are collapsed or restricted
by foreign objects will also prevent adequate air flow.
• All duct work passing through unconditioned space must
be properly insulated to minimize duct losses and prevent
condensation. Use insulation with an outer vapor barrier.
Refer to local codes for insulation material requirements.
HEAT PUMP INSTALLATION
Unpacking the Unit
It is recommended that the unit be unpacked at the installation
site to minimize damage due to handling.
CAUTION:
Do not tip the unit on its side. Oil may enter the
compressor and cause damage.
1. Remove the bands from around the unit.
2. Unfold the top and bottom cap flanges.
3. Carefully remove the top cap and tube.
Installing Return & Supply Air Collars (Optional)
Supply and return collars are not supplied with the unit but
are offered as accessory item. Check with your distributor for
pricing and availability. They can be easily positioned over the
unit openings and secured with sheet metal screws. See Figure
3 (page 6).
• The diameter of the return duct collar is 14”.
• The diameter of the supply duct collar is 12”.
• Before permanently installing the collars, it is recommended
you pre-fit them over the openings first to determine best fit
and alignment.
Supply Duct
1. Assemble the collar by overlapping the two ends.
NOTE: One end of the collar is slotted and the opposite end
has two small holes. Position the end with small screw holes
underneath the slotted end.
2. Fasten the collar ends with two self drilling sheet metal screws.
3. Position the collar over the opening and align the 4 holes in
the collar with the 4 holes (or dimples depending on model)
in the rear panel.
4. Using self-drilling screws (10-16x.5), secure the collar to the
rear panel.
Figure 2. Typical Duct Applications
SINGLE DUCT APPLICATION MULTIPLE DUCT APPLICATION

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Return Duct
1. Assemble the collar by overlapping the two ends.
NOTE: One end of the collar is slotted and the opposite end
has two small holes. Position the end with small screw holes
underneath the slotted end.
2. Fasten the collar ends with two self drilling sheet metal screws.
3. Position the collar over the opening. Align the four holes in
the collar with the four dimples or holes (depending on unit
model) in the panel.
4. Secure the collar to the rear panel using self tapping screws
(10-16x.5).
Connecting Return & Supply Air Flexible Ducts
• Flexible ducts may be cut to the required length and spliced
with sheet metal sleeves and clamps. Keep all ducts as short
and straight as possible. Avoid sharp bends. Please follow
all instructions packed with duct.
• Flexible ducts can be secured to the corresponding collars
with the provided clamps. After the inner duct is connected
to the collar, pull the insulation and plastic sleeve over the
connection and clamp. NOTE: To prevent a loss in cooling
capacity, make sure all connections are tight.
• Ducts may be spliced with sheet metal sleeves and clamps.
• After the inner duct is connected to the proper fitting, the
insulation and plastic sleeve should be pulled over the
connection and clamped.
• Homes with multiple supply ducts (or special applications),
a Y fitting is available to divide the supply air so it can be
ducted to different areas of the home for more efficient cooling.
NOTE: For maximum performance, insulate the Y fitting..
Locating & Installing the Return Air Assembly
To simplify installation, locate and install the return air assembly
first. See Figure 4. If desired, the return opening can be located
inside a closet with louvered doors that has an open area equal
to or greater than a 12” x 20” grille. The return air grille can be
placed in the wall of a closet and the ducted into the filter box
through a boxed-in area at the closet floor level. Make sure the
filter is readily accessible.
NOTE: The return air box with grille and filter should not be
located in heavy traffic areas like hallways or center of rooms.
A good spot is in a corner or under a table, if a minimum two
inch clearance is available.
1. Start the installation from under the home by cutting a small
hole in the sub-floor. Determine how the floor joist location
will affect cutting the opening needed for the return air box.
NOTE: Floor joists are generally located on 16” centers,
leaving 14-3/8” between joists.
2. After measuring the return air box (approximately 12-1/4” x
20-1/4”), cut the hole through the floor so that the box will fit
between the floor joists. Care should be taken when cutting
through carpeting to avoid snags. NOTE: In most installations it
will be necessary to cut a similar hole in the fiberboard directly
under the hole in the floor. However, if the floor is more than
ten inches deep, it will only be necessary to cut a hole for the
collar on the return air box or for the insulated duct.
3. Set the box into the opening and fasten with screws or nails.
4. Install the filter and return air grille in place.
Locating & Installing the Supply Damper(s)
CAUTION:
If installing this air conditioning system in
conjunction with a furnace, a damper must be
installed in the furnace base assembly to prevent
cold air from being discharged around the heat
exchanger. Damage to the heat exchanger and
asphyxiation may occur if a damper is not
installed.
Check with the furnace manufacturer for damper
requirements. Failure to install the required
furnace damper may invalidate code agency
listing and limited warranty on the furnace.
When locating the supply damper(s), carefully check floor joists
and frame members that could interfere with the installation of the
damper or flexible duct. Ideally, the damper (Figure 5) should be
located in the bottom of the main duct, forward of center of the
home, at least three feet from the nearest register. The round
supply opening in the slanted side of the damper should face
the side of the home where the heat pump is located.
1. Locate the center of the heat duct by cutting a small hole in
the fiberboard below the duct at the desired location.
2. Cut a hole approximately 3/4” larger than the damper opening
in the fiberboard.
3. Cut a 9-1/8” x 13-1/8” hole in the duct and bend over all tabs
flat on the inside of the heat duct.
4. Insert the damper into the duct and bend over all tabs flat on
the inside of the heat duct.
5. Seal the opening between the fiberboard and damper or
flexible duct.
Condensate Drainage
A 3/4” condensate fitting extends out of the side of the unit
as shown in Figure 6. The drain trap, shipped in the electrical
compartment, must be installed to prevent water from collecting
inside the unit.
1. Thread the elbow provided with the unit into the drain
connection until hand tight.
2. Connect the condensate tubing onto the fitting, forming a trap
(Figure 6) near the drain connection.
3. Route the condensate tube from the trap to a suitable drain.
NOTE: For proper drainage, make sure the trap is level to
the ground and tubing outlet is below trap level.
Transition
Duct Screws
Supply Air Return Air
Duct
Dimples
Figure 3. Return & Supply Air Collars

7
Figure 4. Typical Return Air Assembly
AUTOMATIC DAMPER IS CLOSED
WHEN HEAT PUMP IS OFF
Figure 5. Typical Supply Damper
Figure 6. Drain Trap
Elbow
P-Trap
ELECTRICAL CONNECTIONS
WARNING:
ELECTRICAL SHOCK, FIRE OR
EXPLOSION HAZARD
Failure to follow safety warnings exactly could
result in serious injury, death or property damage.
Improper servicing could result in dangerous
operation, serious injury, death or property
damage.
• Before servicing, disconnect all electrical power
to the indoor blower.
• When servicing controls, label all wires prior
to disconnecting. Reconnect wires correctly.
• Verify proper operation after servicing.
• Electrical connections must be in compliance with all applicable
local codes and ordinances, and with the current revision of
the National Electric Code (ANSI/NFPA 70).
• For Canadian installations the electrical connections and
grounding shall comply with the current Canadian Electrical
Code (CSA C22.1 and/or local codes).
Pre-Electrical Checklist
√Verify that the voltage, frequency, and phase of the supply
source match the specifications on the unit rating plate.
√Verify that the service provided by the utility is sufficient to
handle the additional load imposed by this equipment. Refer
to the unit wiring label for proper high and low voltage wiring.
√Verify factory wiring is in accordance with the unit wiring
diagram. See Figure 11 (page 14), Figure 12 (page 15),
& Figure 13 (page 16). Inspect for loose connections.
Line Voltage
• A wiring diagram is located on the inside cover of the electrical
box of the unit. The installer should become familiar with the
wiring diagram before making any electrical connections to
the unit.
• An electrical disconnect must be located within sight
of and readily accessible to the unit. This switch shall be
capable of electrically de-energizing the outdoor unit. See unit
data label for proper incoming field wiring. Any other wiring
methods must be acceptable to authority having jurisdiction.
• Line voltage to the unit should be supplied from a dedicated
branch circuit containing the correct fuse or circuit breaker for
the unit. Incoming field wiring and minimum size of electrical
conductors and circuit protection must be in compliance with
information listed on the unit data label. Any other wiring
methods must be acceptable to authority having jurisdiction.
• Provide power supply for the unit in accordance with the unit
wiring diagram, and the unit rating plate. Connect the line-
voltage leads to the terminals on the contactor inside the
control compartment. Extend leads through power wiring hole.
See Figure 7. Connect L1 & L2 directly to the contactor.
• The unit requires both power and control circuit electrical
connections. Refer to the wiring diagrams Figure 11 (page
14), Figure 12 (page 15), & Figure 13 (page 16)for
identification and location of unit field wiring interfaces. Make
all electrical connections in accordance with all applicable
codes and ordinances.
• Use only copper wire for the line voltage power supply to this
unit. Use proper code agency listed conduit and a conduit
connector for connecting the supply wires to the unit. Use of
rain tight conduit is recommended.
Figure 7. Power Entry
Low Voltage
High Voltage
Strip Heat Voltage

8
CAUTION:
Label all wires prior to disconnection when
servicing controls. Wiring errors can cause
improper and dangerous operation. Verify proper
operation after servicing.
• Units are shipped from the factory wired for 240 volt transformer
operation. For 208V operation, remove the lead from the
transformer terminal marked 240V and connect it to the
terminal marked 208V.
• Optional equipment requiring connection to the power or
control circuits must be wired in strict accordance of the NEC
(ANSI/NFPA 70), applicable local codes, and the instructions
provided with the equipment.
Overcurrent Protection
Overcurrent protection must be provided at the branch circuit
distribution panel and sized as shown on the unit rating label and
according to applicable local codes. Generally, the best fuse or
breaker for any heat pump is the smallest size that will permit
the equipment to run under normal usage and provide maximum
equipment protection. Properly sized fuses and breakers also
prevent nuisance trips during unit startup
NOTE: If a fuse blows or a breaker trips, always determine
the reason. Do not arbitrarily install a larger fuse or breaker
and do not, in any case, exceed the maximum size listed
on the data label of the unit.
Grounding
WARNING:
The unit cabinet must have an uninterrupted or
unbroken electrical ground to minimize personal
injury if an electrical fault should occur. Do not
use gas piping as an electrical ground!
This unit must be electrically grounded in accordance with
local codes or, in the absence of local codes, with the National
Electrical Code (ANSI/NFPA 70) or the CSA C22.1 Electrical
Code. Use the grounding lug provided in the control box for
grounding the unit.
Thermostat / Low Voltage Connections
• The unit is designed to operate from a 24 VAC Class II control
circuit. The control circuit wiring must comply with the current
provisions of the NEC (ANSI/NFPA 70) and with applicable
local codes having jurisdiction. Thermostat connections should
be made in accordance with the instructions supplied with the
thermostat and the indoor equipment.
• A heat pump thermostat is equipped with a system HEAT-
COOL EM HEATswitch, which provides a positive means of
preventing simultaneous operation of the heating and cooling
units. The thermostat is also equipped with an ON-AUTO fan
switch which allows the home owner to operate the indoor
blower when air circulation is desired.
• Connect the low voltage wires to the respective terminals
on the thermostat base. See Figure 14 (page 17)and
the thermostat instruction sheet for more detailed wiring
information.
• The thermostat should be mounted about 5 feet above the
floor on an inside wall. DO NOT install the thermostat on an
outside wall or any other location where its operation may be
adversely affected by radiant heat from fireplaces, sunlight, or
lighting fixtures, and convective heat from warm air registers or
electrical appliances. Refer to the thermostat manufacturer’s
instruction sheet for detailed mounting information.
Defrost Control Board Test Pins
• Placing a jumper between the test pins for less than 1 second
will bypass the Anti-Short Cycle Timer.
• Placing a jumper between the test pins for more than 1 second
will force the unit into a defrost cycle. As soon as the jumper
is removed, the defrost cycle will end as determined by the
typical criteria.
• To determine operating status or fault conditions, refer to
Table 1 (page 10) for diagnostic description.
Clearing Defrost Board Fault Codes
• Fault codes can be removed from memory through the use of
the test pins. This is accomplished by shorting the two test
pins momentarily (more than 1 second) while there is no Y1
IN input present.
• Without resetting using the test pins, the fault codes will stay
in the board’s memory continuously (even through loss of
power) for 7 days.
Electric Heat Package (optional)
This heat pump is shipped without an auxiliary electric heat kit
installed. If electric heat is desired, an accessory heater kit must
be field installed. Refer to Table 3 (page 13) for blower speeds.
• Select the correct size heat package for the installation. See
specifications sheet for available kits and application. Install
the heater kit according to the to the installation instructions
provided with the kit.
• Installation is most easily accomplished before making duct
or electrical connections.
Outdoor Thermostat Options
HUD Outdoor Thermostat Option
This thermostat prevents the operation of supplemental electrical
resistance heat at outdoor temperatures above 40° F, except for
defrost operation. For additional info refer to Title 24: Housing and
Urban Development-Subpart H, Section 3280.714, Paragraph
1, Item ii.
1. Remove the white wire between terminal W2 (on the terminal
strip) and W2 IN terminal (on the defrost board) and discard.
See Figure 14 (page 17) for additional wiring connections.
2. Move the white jumper wire from W2 terminal (between E
and W2 on the terminal strip) and connect to W2 IN terminal
(on the defrost board).
2nd Stage Thermostat Option
Models without an outdoor thermostat have a white wire from
W2 on the terminal strip to W2 on the defrost board for the use
of supplemental electrical resistance heat for a W2 or E call. For
2nd stage outdoor thermostat wiring connections, see Figure 14.
A jumper wire is supplied from W2 to E on the terminal strip
on all models.
Blower Speed
For optimum system performance and comfort, it may be
necessary to change the factory speed setting. See Table 3
for factory settings.
WARNING:
To avoid electric shock, personal injury, or death,
turn off the electric power at the disconnect or the
main service panel before making any electrical
connections.

9
CAUTION:
Label all wires prior to disconnection when
servicing controls. Wiring errors can cause
improper and dangerous operation. Verify proper
operation after servicing.
CAUTION:
To avoid personal injury or property damage,
make certain that the motor leads cannot come
into contact with any metal components of the
unit.
1. Disconnect all electrical power to the unit and remove the
service panel.
2. Verify the required speed from the airflow data found in Table
3 (page 13). Place appropriate wire on the appropriate
motor speed tap for the required airflow.
3. Check all factory wiring per the unit wiring diagram and inspect
the factory wiring connections make sure no wires loosened
during shipping or installation.
Ambient Sensor Mounting
For optimum performance of the heat pump system, the clip
for the ambient sensor is factory installed on the control panel.
The ambient sensor is inserted into the clip groove and holds
it securely in place as shown in Figure 8.
STARTUP & ADJUSTMENTS
Pre-Start Checklist
The following check list should be observed prior to starting
the unit.
√Is the unit level? Unit should be level or slightly slanted toward
the drain for proper condensate drainage.
√Is the unit installed with the proper clearances as listed on
page 4?
√Is the wiring correct according to the wiring diagram and
electrical codes?
√Are all the wiring connections tight? Check the condenser fan
to make sure it turns freely.
√Is the overcurrent protection properly sized?
√Is the thermostat wired correctly? Is it installed in a proper
location?
√To achieve rated capacity and efficiency the compressor must
be exposed to refrigerant for at least 24 hours prior to running
and then must be run for a minimum of 12 hours.
Start-Up Procedure
CAUTION:
If the unit is equipped with a crankcase heater,
allow 24 hours prior to continuing the start up
procedures to allow for heating of the refrigerant
compressor crankcase. Failure to comply may
result in damage and could cause premature
failure of the system. This warning should be
followed at initial start up and any time the power
has been removed for 12 hours or longer.
The control circuit consists of an anti-short cycle timer that will
not let the compressor re-start before 5 minutes have elapsed.
Figure 8. Ambient Sensor Mounting
1. Set the system mode to OFF and the temperature mode to
its highest setting.
2. Turn power on at the disconnect switch.
3. Set the system mode to ON or COOL.
4. Set the temperature mode below room temperature. Verify
that the indoor blower, outdoor fan, and compressor energize
and the cooling function starts.
5. Verify the discharge air grilles are adjusted and the system
air is balanced.
6. Verify the duct work has no air leaks.
7. Verify the condensate drain is installed correctly and functions
properly.
8. Set the temperature mode above room temperature. The unit
should stop.
9. Instruct the homeowner on unit and thermostat operation and
filter servicing.
Air Circulation
Leave the thermostat system mode on OFF, and set the fan
mode to ON. Blower should run continuously. Check the air
delivery at the supply registers and adjust register openings for
balanced air distribution. Examine ducts for leaks or obstruction
if insufficient air is detected.
Set the thermostat fan mode to AUTO. The blower should stop
running.
System Heating
Set the thermostat system mode to HEAT and the fan mode to
AUTO. Change the thermostat temperature selector above the
existing room temperature and check for the discharge of warm
air at the supply registers.
System Cooling
Set the thermostat’s system mode to COOL and the fan mode to
AUTO. Change the thermostat temperature selector below the
existing room temperature. Allow the cooling system to operate
for several minutes and check for the discharge of cool air at
the supply registers.
Short Cycle Protection
The control circuit is equipped with a time-delay feature for
protection against short cycling. With the system operating in
the cooling mode, gradually raise the thermostat temperature
setting until the whole system de-energizes. Immediately lower
the thermostat temperature to the original setting and verify that
the indoor blower is energized. After approximately 5 minutes
the compressor and the outdoor fan will energize.
Emergency Heat
(Available only when Electric heat is supplied)
1. Set the thermostat’s system mode to EM HT and the fan
mode to AUTO (intermittent air) or ON (continuous air).

10
2. Set the thermostat’s temperature selector above the existing
room temperature and check the following:
• The thermostat auxiliary heat is indicated as ON.
• The compressor and the fan should not run; low voltage
circuit remains energized.
• The blower runs according to the thermostat’s fan mode
setting.
Forced Defrost Mode (Field Test)
• When the TEST terminals are shorted for more than 3 seconds,
with the Y1 input active and pressure switches closed, the
ACST will be eliminated and the compressor contactor output
energizes. The control will be placed into a forced defrost
mode.
NOTE: The coil temperature sensor does not need to be cold
when the unit is forced into defrost.
• If the short across the TEST pins exist, the unit will stay
in DEFROST as long as the short remains or until the
TERMINATE TIME is reached (11 minutes). This will happen
regardless of coil temperature.
Anti Short Cycle Timer Test
The 5 minute time delay feature can be bypassed by shorting
the TEST pins together.
Heating Mode
When the TEST pins are shorted together for more than 1 second,
the control will switch between defrost mode and heating mode.
Cooling Mode
When the TEST pins are shorted together for more than 1
second, the Anti Short Cycle Timer will be bypassed.
COMPONENT FUNCTIONS
Low Pressure Switch (Select Models) - This safety switch is
factory installed and located in the suction line internal to the
unit. The switch is designed to protect the compressor if a loss
of charge occurs. Under normal conditions, the switch is closed.
If the suction pressure falls below 20 psig, then the switch will
open and de-energize the unit. The switch will close again once
the suction pressure increases above 35 psig. The low pressure
switch interrupts the thermostat inputs to the unit.
NOTE: When the switch opens and then closes, there will be
a 5 minute short cycling delay before the unit can energize.
High Pressure Switch - This safety switch is factory installed
and located in the compressor discharge line internal to the
unit. The switch is designed to de-energize the system when
very high pressures occur during abnormal conditions. Under
normal conditions, the switch is closed.
If the discharge pressure rises above 650 psig, the switch will
open and de-energize the unit. The switch will close again once
the discharge pressure decreases to 460 psig. The high pressure
switch interrupts the thermostat inputs to the unit.
NOTE: When the switch opens and then closes, there will be
a 5 minute short cycling delay before the unit can energize.
UNIT MAINTENANCE
WARNING:
To prevent electrical shock, personal injury, or
death, disconnect all electrical power to the unit
before performing any maintenance or service.
The unit may have more than one electrical
supply.
Proper maintenance is important to achieve optimum
performance from the heat pump. The ability to properly perform
maintenance on this equipment requires certain mechanical
skills and tools. If you do not possess these skills, contact your
dealer for maintenance. Consult your local dealer about the
availability of maintenance contracts. Routine maintenance
should include the following:
• Inspect and clean or replace air filters at the beginning of each
heating and cooling season, or more frequently if required.
• Inspect the condensate drain and outdoor coil at the beginning
of each season. Remove any debris. Clean the coils as
necessary using water or an approved all-aluminum cleaner.
Rinse thoroughly with water.
• Inspect the electrical connections for tightness at the beginning
of each heating and cooling season. Service as necessary.
• Inspect and clean blower housing, motor and wheel.
CAUTION:
The unit should never be operated without a
filter in the return air system. Replace disposable
filters with the same type and size.
• Do not attempt to add additional oil to motors unequipped
with oil tubes. The compressor is hermetically sealed at the
factory and does not require lubrication.
REFRIGERANT CHARGING
CAUTION:
This heat pump contains liquid and gaseous
refrigerant under pressure. Adjustment of
refrigerant charge should only be attempted
by qualified, trained personnel thoroughly
familiar with the equipment and safe responsible
refrigerant handling procedures. Under no
circumstances should the homeowner attempt
to install and/or service this equipment. Failure
to comply with this warning could result in
equipment damage, personal injury, or death.
Table 1. Control Board Status Indicators
STATUS
INDICATOR
STATUS
TYPE
DIAGNOSTIC
DESCRIPTION
C1 Operating Status Cooling, 1st Stage
H1 Operating Status Heating, 1st Stage
SC Operating Status Anti Short Cycle Timer
dF Operating Status Defrost
_. Operating Status Power on, no call for
operation
01 Fault Pressure Switch, low
02 Fault Pressure Switch, high
03 Fault Temperature Sensor,
Ambient
04 Fault Temperature Sensor, Coil
05 Fault Board
dF (flashing) Input Error
Forced defrost - test
short applied longer than
11 minutes

11
If the outdoor temperature is between 35 degrees F and
65 degrees F:
1. Block off the discharge of the outdoor fan. NOTE: One half
of the unit should be covered corner to corner as shown in
Figure 9.
2. With the unit in cooling mode, and with the system operating
at steady state, measure the superheat at suction service
valve (Fixed orifice systems).
3. Measure the outdoor dry bulb temperature ( F) and indoor
wet bulb temperature ( F).
NOTE: The charging tables are on the inside of the unit’s
electrical control access panel. The tables provide superheat
targets for th e units.
4. Adjust the charge to match the superheat.
5. The system should be charged so that the measured superheat
is within +/ 1 F of the target listed in the table.
• If your measured superheat at the suction valve is LESS
THAN the recommended superheat value in the table, then
REMOVE refrigerant.
• If your measured superheat at the suction valve is GREATER
THAN the recommended superheat value in the table, then
ADD refrigerant.
NOTE: The refrigerant charge can be checked and adjusted
through the service ports provided external to the unit. Use
only gage line sets which have a “Schrader” depression device
present to actuate the valve.
Charging the Unit in AC Mode
If the outdoor temperature is above 65 degrees F or higher:
Charge the system following the steps below:
1. With the system operating at steady state, measure the
superheat at suction line service valve.
2. Measure the outdoor dry bulb temperature ( F) and indoor
wet bulb temperature ( F).
NOTE: The charging tables are on the inside of the unit’s
electrical control access panel. The tables provide superheat
targets for the units.
3. Adjust the charge to match the superheat.
4. The system should be charged so that the measured superheat
is within +/ 1 F of the target listed in the table.
• If your measured superheat at the suction valve is LESS
THAN the recommended superheat value in the table then
REMOVE refrigerant.
• If your measured superheat at the suction valve is GREATER
THAN the recommended superheat value in the table then
ADD refrigerant.
Figure 9. Q94RD With Fan Discharge Blocked Off

12
FIGURES & TABLES
Figure 10. Unit Dimensions
A
3”
Opening for
12" Diameter
Supply Duct
9.15
17.50
9.0
Opening for
14" Diameter
Return Duct
10.15
5.5 B
1”
3.15
Alternate Power
Supply Entry
Rear
View
L
W
Top
View
18.01
1.75 Ø Electric Heater Power Supply
1.125 Ø Power Supply
0.875 Ø Low Voltage Supply
Control
Access
Panel
Blower Access Panel
H17.86
15.36
10.10
3/4" NPT
Drain Connection
1"
12.13
1.38 3.2
3.2 5.29
Side View
MODEL
NUMBER
Q94RD
LENGTH
(L)
WIDTH
(W)
HEIGHT
(H) A B
024K 49 35 30.2 35.02 2.48
030K 49 35 30.2 35.02 2.48
036K 49 35 30.2 35.02 2.48
042K 63 35 38.2 35.02 2.48
048K 63 35 38.2 35.02 2.48
060K 63 35 38.2 35.02 2.48
Table 2. Physical Data

13
Table 3. Heat Rise Data
MODEL
NUMBER
Q94RD
BLOWER
SETTING
HEAT RISE DATA (BASED ON NOMINAL 10KW ELECTRIC HEAT KIT)
EXTERNAL STATIC PRESSURE DROP - INCHES WATER COLUMN
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
CFM HEAT
RISE CFM HEAT RISE CFM HEAT RISE CFM HEAT RISE CFM HEAT RISE CFM HEAT RISE CFM HEAT RISE CFM HEAT RISE
024K
Tap T1 1,009 31 951 33 910 35 856 37 797 40 725 44 660 48 605 52
Tap T2** 1,146 28 1,102 29 1,049 30 1,004 31 955 33 898 35 829 38 761 42
Tap T3* 1,198 26 1,154 27 1,107 29 1,059 30 1,010 31 959 33 895 35 827 38
Tap T4 1,290 24 1,242 25 1,197 26 1,150 27 1,102 29 1,049 30 1,003 31 939 34
Tap T5 1,425 22 1,383 23 1,334 24 1,287 25 1,246 25 1,194 26 1,149 27 1,092 29
030K
Tap T1 1,009 31 951 33 910 35 856 37 797 40 725 44 660 48 605 52
Tap T2** 1,146 28 1,102 29 1,049 30 1,004 31 955 33 898 35 829 38 761 42
Tap T3 1,290 24 1,242 25 1,197 26 1,150 27 1,102 29 1,049 30 1,003 31 939 34
Tap T4* 1,397 23 1,353 23 1,306 24 1,262 25 1,213 26 1,168 27 1,120 28 1,060 30
Tap T5 1,546 20 1,505 21 1,467 22 1,417 22 1,366 23 1,320 24 1,272 25 1,223 26
036K
Tap T1 1,146 28 1,107 29 1,056 30 1,004 31 960 33 910 35 842 38 782 40
Tap T2** 1,269 25 1,232 26 1,197 26 1,146 28 1,098 29 1,056 30 993 32 932 34
Tap T3 1,400 23 1,363 23 1,316 24 1,276 25 1,229 26 1,191 27 1,142 28 1,087 29
Tap T4* 1,485 21 1,445 22 1,404 23 1,366 23 1,325 24 1,282 25 1,236 26 1,184 27
Tap T5 1,612 20 1,571 20 1,530 21 1,492 21 1,453 22 1,409 22 1,364 23 1,322 24
042K
Tap T1 1,512 21 1,459 22 1,443 22 1,400 23 1,367 23 1,335 24 1,298 24 1,271 25
Tap T2** 1,627 19 1,596 20 1,558 20 1,534 21 1,503 21 1,467 22 1,433 22 1,400 23
Tap T3 1,734 18 1,700 19 1,670 19 1,642 19 1,606 20 1,575 20 1,543 20 1,509 21
Tap T4* 1,840 17 1,813 17 1,780 18 1,750 18 1,716 18 1,685 19 1,650 19 1,613 20
Tap T5 1,942 16 1,920 16 1,884 17 1,853 17 1,821 17 1,787 18 1,752 18 1,713 18
048K
Tap T1 1,474 21 1,417 22 1,379 23 1,344 24 1,304 24 1,266 25 1,230 26 1,184 27
Tap T2** 1,590 20 1,559 20 1,519 21 1,467 22 1,439 22 1,396 23 1,360 23 1,320 24
Tap T3* 1,749 18 1,711 18 1,665 19 1,633 19 1,589 20 1,551 20 1,514 21 1,476 21
Tap T4 1,913 17 1,873 17 1,835 17 1,802 18 1,760 18 1,718 18 1,688 19 1,643 19
Tap T5 2,097 15 2,052 15 2,016 16 1,980 16 1,939 16 1,894 17 1,856 17 1,814 17
060K
Tap T1 1,455 22 1,412 22 1,362 23 1,323 24 1,277 25 1,238 26 1,188 27 1,160 27
Tap T2** 1,668 19 1,627 19 1,599 20 1,558 20 1,521 21 1,478 21 1,444 22 1,405 22
Tap T3 1,854 17 1,809 17 1,783 18 1,745 18 1,707 19 1,667 19 1,629 19 1,593 20
Tap T4* 2,008 16 1,976 16 1,939 16 1,904 17 1,875 17 1,833 17 1,801 18 1,760 18
Tap T5 2,174 15 2,133 15 2,101 15 2,066 15 2,038 16 2,002 16 1,969 16 1,932 16
NOTES:
Temperature rises shaded gray are for reference only. These conditions are not recommended.
* Denotes factory set for cooling & heating speed
** Denotes factory set auxiliary heating speed – tested with 10KW

14
Figure 11. W.D. for 2 & 2.5 Ton Models
10407060
04/22
WIRING DIAGRAM
208/230 VOLTSMALL PACKAGED HEAT PUMP - SINGLE PHASE 60HZ
1. Disconnect all power before servicing. 2. For supply connections use copper conductors only. 3. Not suitable on systems that exceed 150V to ground. 4. For replacement wires use conductors suitable for 105°C.
1. Couper le courant avant de faire letretine. 2. Employez uniquement des conducteurs en cuiver. 3. Ne convient pas aux installations de plus de 150V a la terre. 4. Remplacement pour utiliser les fils conducteurs adapté à 105°C. 5. Contacteur de basse pression sur une sélection de modèles ou ponté du LP1 et LP2 6. Consultez les directives d’installation pour le réglage du débit d’air du moteur du souffleur et l'emplacement des bornes.
2 AND 2.5 TON
5. Low Pressure Switch jumpered from LP1 to LP2 (on select models) 6. See Installation Instructions for blower motor airflow setting and terminal locations. 7. Select units have factory installed HUD thermostat to limit electric heat. If Hud application see low voltage section in the unit Installation Instructions.
OUTDOOR FAN
MOTOR
3 AMP
FUSE
TRANSFORMER
240V
24V
COM
S
R
C
NO
NC
L1
L2
GRD
5 4 3 2 1
N
G
L
C
BLOWER
MOTOR
Y2 IN
FAN2 CCH2 CCH1
W2 IN
Y1 IN C
R
HOT1
HOT2(24V COM)
OUTDOOR TEMP
Y1 OUT
RV1
O
LP1LP2HP1HP2
DEFROST CONTROL BOARD
COIL#1 TEMP
RV2
COIL SENSOR AMB SENSOR
FAN1
W2 OUT
Y2 OUT
CCH
RVS
4 3 2 1 8 7 6 5 9
OUTDOOR THERMOSTAT
HPS
HGBP
LPS
TO 208/230-1-60
POWER SUPPLY
RY1G OC W2
Y2
E
CONTACTOR
T1
T2
L2 L1
ORANGE
208/230V
H
C
F
R
C
S
S
C
R
L2
T2
COMPRESSOR
CONTACTOR
L1
T1
COMPRESSOR
OUTDOOR FAN MOTOR
5 4 3 2 1
N
G
L
C
BLOWER
MOTOR
FUSE
TRANSFORMER
COOLIING OR HEATING
HEATER
PRESSURE
EQUALIZATION
VALVE
24V
C
RS
F
C
H
RELAY
DUAL
CAPACITOR
COMPRESSOR
PRESSURE
EQUALIZATION
VALVE
YELLOW
BLUE
OUTDOOR THERMOSTAT
RED
BLACK
Y2 IN
FAN2 CCH2 CCH1
W2 IN
Y1 IN C
R
HOT1
HOT2(24V COM)
OUTDOOR TEMP
Y1 OUT
RV1
O
LP1LP2HP1HP2
DEFROST CONTROL BOARD
COIL#1 TEMP
RV2
COIL SENSOR AMB SENSOR
FAN1
W2 OUT
Y2 OUT
RVS
HPS
HGBP
LPS
T’STAT TERMINAL STRIP
CRE
Y2Y1 W2
OG
NO
NC
BLOWER
RELAY
7 6 2 1
CCH
CC COMPRESSOR
CONTACTOR COIL
ACCESSORY
HEAT PLUG
BLUE
SEE NOTE 5
SEE NOTE 5
BLACK
RED
RED
WHITE
BLACK
GREEN
GREY
WHITE
BLACK
BLACK
BROWN
BLACK
RED
BLACK
BLACK
ORANGE
RED
YELLOW
WHITE
WHITE
RED
SEE NOTE 6
BLACK
YELLOW
VIOLET
VIOLET
YELLOW
YELLOW
ORANGE
BROWN
GREEN
GREEN
FIELD WIRING
LEGEND:
LOW VOLTAGE
HIGH VOLTAGE
Wiring Diagrams

15
Figure 12. W.D. for 3, 3.5 & 4 Ton Models
10407070
04/22
FIELD WIRING
LEGEND:
LOW VOLTAGE
HIGH VOLTAGE
WIRING DIAGRAM
208/230 VOLTSMALL PACKAGED HEAT PUMP - SINGLE PHASE 60HZ
NOTES: 1. Disconnect all power before servicing. 2. For supply connections use copper conductors only. 3. Not suitable on systems that exceed 150V to ground. 4. For replacement wires use conductors suitable for 105°C. 5. Low Pressure Switch jumpered from LP1 to LP2 (on select models) 6. See Installation Instructions for blower motor airflow setting and terminal locations. 7. Select units have factory installed HUD thermostat to limit electric heat. If Hud application see low voltage section in the unit Installation Instructions.
1. Couper le courant avant de faire letretine. 2. Employez uniquement des conducteurs en cuiver. 3. Ne convient pas aux installations de plus de 150V a la terre. 4. Remplacement pour utiliser les fils conducteurs adapté à 105°C. 5. Contacteur de basse pression sur une sélection de modèles ou ponté du LP1 et LP2. 6. Consultez les directives d’installation pour le réglage du débit d’air du moteur du souffleur et l'emplacement des bornes.
3.0/3.5/4.0 TON
OUTDOOR FAN
MOTOR
3 AMP
FUSE
TRANSFORMER
240V
24V
COM
S
R
C
NO
NC
L1
L2
GRD
5 4 3 2 1
N
G
L
C
BLOWER
MOTOR
Y2 IN
FAN2 CCH2 CCH1
W2 IN
Y1 IN C
R
HOT1
HOT2(24V COM)
OUTDOOR TEMP
Y1 OUT
RV1
O
LP1LP2HP1HP2
DEFROST CONTROL BOARD
COIL#1 TEMP
RV2
COIL SENSOR AMB SENSOR
FAN1
W2 OUT
Y2 OUT
CCH
RVS
4 3 2 1 8 7 6 5 9
OUTDOOR THERMOSTAT
HPS
HGBP
LPS
TO 208/230-1-60
POWER SUPPLY
RY1G OC W2
Y2
E
CONTACTOR
T1
T2
L2 L1
ORANGE
208/230V
H
C
F
R
C
S
S
C
R
L2
T2
COMPRESSOR
CONTACTOR
L1
T1
COMPRESSOR
OUTDOOR FAN MOTOR
5 4 3 2 1
N
G
L
C
BLOWER
MOTOR
FUSE
TRANSFORMER
COOLIING OR HEATING
HEATER
24V
C
RS
F
C
H
RELAY
DUAL
CAPACITOR
COMPRESSOR
YELLOW
BLUE
RED
BLACK
Y2 IN
FAN2 CCH2 CCH1
W2 IN
Y1 IN C
R
HOT1
HOT2(24V COM)
OUTDOOR TEMP
Y1 OUT
RV1
O
LP1LP2HP1HP2
DEFROST CONTROL BOARD
COIL#1 TEMP
RV2
COIL SENSOR AMB SENSOR
FAN1
W2 OUT
Y2 OUT
RVS
HPS
HGBP
LPS
T’STAT TERMINAL STRIP
CRE
Y2Y1 W2
OG
NO
NC
BLOWER
RELAY
7 6 2 1
CCH
CC
ACCESSORY
HEAT PLUG
BLACK
BLACK
OUTDOOR THERMOSTAT
COMPRESSOR
CONTACTOR COIL
BLUE
SEE NOTE 5
SEE NOTE 5
BLACK
RED
RED
WHITE
BLACK
GREEN
GREY
WHITE
BLACK
BLACK
BROWN
BLACK
RED
BLACK
BLACK
ORANGE
RED
YELLOW
WHITE
WHITE
RED
SEE NOTE 6
BLACK
YELLOW
VIOLET
VIOLET
YELLOW
YELLOW
ORANGE
BROWN
GREEN
GREEN

16
Figure 13. W.D. for 5 Ton Models
10407080
04/22
FIELD WIRING
LEGEND:
LOW VOLTAGE
HIGH VOLTAGE
WIRING DIAGRAM
208/230 VOLTSMALL PACKAGED HEAT PUMP - SINGLE PHASE 60HZ
NOTES: 1. Disconnect all power before servicing. 2. For supply connections use copper conductors only. 3. Not suitable on systems that exceed 150V to ground. 4. For replacement wires use conductors suitable for 105°C. 5. Low Pressure Switch jumpered from LP1 to LP2 (on select models) 6. See Installation Instructions for blower motor airflow setting and terminal locations. 7. Select units have factory installed HUD thermostat to limit electric heat. If Hud application see low voltage section in the unit Installation Instructions.
1. Couper le courant avant de faire letretine. 2. Employez uniquement des conducteurs en cuiver. 3. Ne convient pas aux installations de plus de 150V a la terre. 4. Remplacement pour utiliser les fils conducteurs adapté à 105°C. 5. Contacteur de basse pression sur une sélection de modèles ou ponté du LP1 et LP2. 6. Consultez les directives d’installation pour le réglage du débit d’air du moteur du souffleur et l'emplacement des bornes.
5.0 TON
3 AMP
FUSE
TRANSFORMER
240V
24V
COM
NO
NC
L1
L2
GRD
5 4 3 2 1
N
G
L
C
BLOWER
MOTOR
Y2 IN
FAN2 CCH2 CCH1
W2 IN
Y1 IN C
R
HOT1
HOT2(24V COM)
OUTDOOR TEMP
Y1 OUT
RV1
O
LP1LP2HP1HP2
DEFROST CONTROL BOARD
COIL#1 TEMP
RV2
COIL SENSOR AMB SENSOR
FAN1
W2 OUT
Y2 OUT
CCH
RVS
OUTDOOR THERMOSTAT
HPS
HGBP
LPS
TO 208/230-1-60
POWER SUPPLY
RY1G OC W2
Y2
E
CONTACTOR
T1
T2
L2 L1
208/230V
H
C
F
R
C
S
L2
T2
COMPRESSOR
CONTACTOR
L1
T1
COMPRESSOR
5 4 3 2 1
N
G
L
C
BLOWER
MOTOR
FUSE
TRANSFORMER
COOLIING OR HEATING
HEATER
24V
C
RS
F
C
H
RELAY
DUAL
CAPACITOR
COMPRESSOR
YELLOW
RED
BLACK
Y2 IN
FAN2 CCH2 CCH1
W2 IN
Y1 IN C
R
HOT1
HOT2(24V COM)
OUTDOOR TEMP
Y1 OUT
RV1
O
LP1LP2HP1HP2
DEFROST CONTROL BOARD
COIL#1 TEMP
RV2
COIL SENSOR AMB SENSOR
FAN1
W2 OUT
Y2 OUT
RVS
HPS
HGBP
LPS
T’STAT TERMINAL STRIP
CRE
Y2Y1 W2
OG
NO
NC
BLOWER
RELAY
7 6 2 1
CCH
ACCESSORY
HEAT PLUG
3 2 1
N
G
L
OUTDOOR
MOTOR
YELLOW
WHITE
BLACK
BROWN
G/Y BLUE
BLACK
4 3 2 1 8 7 6 5 9
3 2 1
N
G
L
OUTDOOR
MOTOR
CC
OUTDOOR THERMOSTAT
COMPRESSOR
CONTACTOR COIL
BLUE
SEE NOTE 5
SEE NOTE 5
BLACK
RED
RED
WHITE
BLACK
GREEN
GREY
WHITE
BLACK
BLACK
BROWN
BLACK
RED
BLACK
ORANGE
RED
YELLOW
WHITE
WHITE
RED
SEE NOTE 6
BLACK
YELLOW
VIOLET
VIOLET
YELLOW
YELLOW
ORANGE
BROWN
GREEN
GREEN

17
Figure 14. Typical Heat Pump Thermostat Connections
6
7
8
9
2
3
4
5
1
INDOOR
TERMINAL
THERMOSTAT
DEFROST
BOARD
*HUD
Outdoor
Thermostat
BROWN
ORANGE
ACCESSORY
HEAT PLUG
W2 OUTW2 IN
**Optional 2nd Stage
Outdoor Thermostat
(Field Supplied)
6
7
8
9
2
3
4
5
1
BROWN
ORANGE
Typical Wiring for 1-Stage Cool / Heat, 1 Stage Electric Heat
Typical Wiring for 1-Stage Cool / Heat, Optional 2-Stage Electric Heat
NOTE 1: Optional 2nd stage outdoor thermostat is field supplied.
NOTE 2: HUD outdoor thermostat is not factory installed in all models.
For HUD applications
Remove white wire
between terminal W2
and W2 IN terminal
C
G
O
W2
Y1
E
R
Y2
For HUD applications move the white jumper wire
from W2 terminal and connect to W2 IN terminal
INDOOR
TERMINAL
THERMOSTAT
DEFROST
BOARD
*HUD
Outdoor
Thermostat
ACCESSORY
HEAT PLUG
W2 OUTW2 IN
For HUD applications
Remove white wire
between terminal W2
and W2 IN terminal
C
G
O
W2
Y1
E
R
Y2
For HUD applications move the white jumper wire
from W2 terminal and connect to W2 IN terminal
JUMPER
JUMPER

18

19

INSTALLATION CHECKLIST
ELECTRICAL SYSTEM
Electrical connections tight? YES NO
Line voltage polarity correct? YES NO
Rated Voltage:
L1-L2 Voltage:
Has the thermostat been calibrated? YES NO
Is the thermostat level? YES NO
Is the heat anticipator setting correct? YES NO
REFRIGERATION SYSTEM
Was unit given 24 hr warm up period
for crankcase heaters (if applicable)? YES NO
Ambient Temp (° F):
Discharge Line Temp (° F):
Stage-1 Liquid Pressure (high side):
Stage-1 Suction Pressure (low side):
FILTER SYSTEM
Filter(s) secured in place? YES NO
Filter(s) clean? YES NO
10407050
(NEW)
INSTALLATION ADDRESS:
CITY: STATE:
UNIT MODEL #:
UNIT SERIAL #:
Unit Installed Minimum clearances
per Figure 1 (page 4)?YES NO
INSTALLER NAME:
CITY: STATE:
Has the owner’s information been
reviewed with the customer? YES NO
Has the Literature Package been left
with the unit? YES NO
Specifications & illustrations subject to change without notice or incurring obligations (07/22).
O’Fallon, MO, © Nortek Global HVAC LLC 2022. All Rights Reserved.