Acnodes Q5RF User Manual

Q5RF SERIES

15 SEER

USER’s MANUAL & INSTALLATION INSTRUCTIONS

Single Package Heat Pump - 2 Stage, R-410A

IMPORTANT

Please read this information thoroughly and become familiar with the capabilities
and use of your appliance before attempting to operate or maintain this unit.
Keep this literature where you have easy access to it in the future. If a problem
occurs, check the instructions and follow recommendations given. If these
suggestions don’t eliminate your problem, call your Servicing Contractor.

These instructions are primarily intended to assist qualifi ed 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.

DO NOT DESTROY. PLEASE READ CAREFULLY AND
KEEP IN A SAFE PLACE FOR FUTURE REFERENCE.

USER INFORMATION

About the Heat Pump ................................... 3

Operating Instructions ................................3

Cooling Operation ....................................3

Heating Operation ....................................3

Emergency Heat ...................................... 3

Defrost .....................................................3

System Shutdown ....................................3

Forced Defrost Mode (Field Test) .............12

Anti Short Cycle Timer Test ......................12

Heating Mode ........................................12

Cooling Mode .........................................13

Adjustment of Refrigerant Charge ............13

Charging an R410A Unit in AC

Mode with Outdoor Temp above 65° F .....13

Charging an R410A Unit in Heat Mode ....13

Unit Maintenance ........................................13

INSTALLER INFORMATION

Safety Information ........................................4

General Information .....................................4

Before You Install this Unit ..........................4

Locating the Heat pump ............................ 4

Air Duct System .........................................5

Unconditioned Spaces .............................5

Condensate Drainage .................................5

Heat Pump Installation .................................5

Unpacking the Unit ....................................5

Minimum Clearances .................................5

Service Access Clearance ......................5

Clearances to Combustibles ...................5

Installing Return & Supply Air Fittings ........6

Return Duct ............................................. 6

Supply Duct ............................................6

Locating & Installing the Return Air

Assembly ....................................................6

Locating & Installing the Supply

Dampers .................................................... 7

Connecting the Return & Supply Air

Flexible Ducts .............................................7

Electrical Connections .................................8

Pre - Electrical Checklist.............................8

Line Voltage ................................................8

Grounding ................................................... 8

Overcurrent Protection ............................... 9

2 - Speed Outdoor Fan Motor ..................... 9

Blower Speed ............................................9

Ambient Sensor Mounting ..........................9

Demand Defrost Control ...........................11

Electric Heat Package ..............................11

Thermostat Connections ..........................11

Startup & Adjustments...............................12

Pre - Start Checklist .................................12

Start - Up Procedure ................................12

Air Circulation ........................................12

System Heating .....................................12

System Cooling ......................................12

Short Cycle Protection ...........................12

Emergency Heat ....................................12

2

Refrigerant Charging Charts for

Cooling Mode of Operation .......................14

Figure 11 - 2 Ton Units .............................14

Figure 12 - 3 Ton Units .............................14

Figure 13 - 4 Ton Units .............................15

Figure 14 - 5 Ton Units .............................15

Refrigerant Charging Tables for Heating

Mode of Operation ......................................16

Table 2 - Chart for 2 & 3 Ton Units ............16

Table 3 - Chart for 4 & 5 Ton Units ............17

Wiring Diagrams .........................................18

Figure 15 - 2 & 3 Ton Units .......................18

Figure 16 - 4 & 5 Ton Units .......................19

Component Functions ...............................20

Low Pressure Switch ................................20

High Pressure Switch ...............................20

IMPORTANT SAFETY INFORMATION

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.

Warranty Information

A warranty certificate with full details is
included with the heat pump. Carefully review
these responsibilities with your dealer or
service company. The manufacturer will not be
responsible for any costs found necessary to
correct problems due to improper setup, improper
installation, adjustments, improper operating
procedure on the part of the user, etc. Some
specifi c examples of service calls which are not
included in the limited warranty are:

1. Correcting wiring problems in the electrical
circuit supplying the heat pump.

2. Resetting circuit breakers or other switches.

3. Adjusting or calibrating of thermostat.

USER INFORMATION

ABOUT THE HEAT PUMP

Your heat pump is a unique, all weather comfort­control appliance that will heat and cool your
home year round and provide energy saving
comfort. It’s an unknown fact that heat is always
in the air, even when the outside temperature is
below freezing. The heat pump uses this basic
law of physics to provide energy saving heat
during the winter months. For example, If the
outdoor temperature is 47° F (8° C), your heat
pump can deliver approximately 3.5 units of
heat energy per each unit of electrical energy
used, as compared to a maximum of only 1
unit of heat energy produced with conventional
heating systems.

In colder temperatures, the heat pump performs
like an air conditioner run in reverse. Available
heat energy outside the home is absorbed by
the refrigerant and exhausted inside the home.
This effi cient process means you only pay for
“moving” the heat from the outdoors to the indoor
area. You do not pay to generate the heat, as is
the case with more traditional furnace designs.

During summer, the heat pump reverses the fl ow
of the heat-absorbing refrigerant to become an
energy-effi cient, central air conditioner. Excess
heat energy inside the home is absorbed by the
refrigerant and exhausted outside the home.

Operating Instructions

Cooling Operation

1. Set the thermostat’s system mode to COOL
or AUTO and change the fan mode to AUTO.
See Figure 1

2. Set the temperature selector to the
desired temperature level. The outdoor fan,
compressor, and blower motor will all cycle
on and off to maintain the indoor temperature
at the desired cooling level.

Heating Operation

1. Set the thermostat’s system mode to HEAT
or AUTO and change the fan mode to AUTO.
See Figure 1.

2. Set the temperature selector to the desired
temperature level. The compressor, outdoor
fan, and blower motor will cycle on and off to
maintain the indoor temperature at the desired
heating level.

minutes following a previous operation or the
interruption of the main electrical power.

Emergency Heat
Some thermostats may include a system mode
called EM HT or AUX HT, etc. This is a back­up heating mode that should only be used if a
problem is suspected. With the mode set to EM
HT, etc., the compressor and outdoor fan will
be locked off and supplemental heat (electric
resistance heating) will be used as a source of
heat. Sustained use of electric resistance heat in
place of the heat pump will result in an increase
in electric utility costs.

Defrost
During cold weather heating operation, the
outdoor unit will develop a coating of snow
and ice on the heat transfer coil. This is normal
and the unit will defrost itself. This unit features
Demand Defrost that monitors ambient and coil
temperatures to regulate the defrost function
accordingly.

At the beginning of the defrost cycle, both the
outdoor condenser fan and compressor will
turn off. After approximately 30 seconds, the
compressor will turn on and begin to heat the
outdoor coil causing the ice and snow to melt.
NOTE: While the ice and snow is melting, some
steam may rise from the outdoor unit as the warm
coil causes the melting frost to evaporate. When
defrost is completed, the outdoor fan motor will
start, and the compressor will turn off again. In
approximately 30 seconds the compressor will
start up again and continue normal operation.

System Shutdown
Change the thermostat’s system mode to OFF
and the fan mode to AUTO (See Figure 1).
NOTE: The system will not operate, regardless
of the temperature selector setting.

NOTE: If the temperature level is re-adjusted, or
the system mode is reset, the fan and compressor
in the outdoor unit may not start immediately. A
protective timer circuit holds the compressor
and the outdoor fan off for approximately three

Fan

Mode

Figure 1. Digital Thermostat

System

Mode

Temperature

Selector

3

INSTALLER INFORMATION

SAFETY INFORMATION

WARNING:

The information listed below
must be followed during the
installation, service, and operation
of this unit. Unqualifi ed 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 per

• 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.

• This equipment contains liquid and gaseous

refrigerant under high pressure. Installation or
servicing should only be performed by qualifi ed
trained personnel thoroughly familiar with this
type equipment.

• All electrical wiring must be completed in

accordance with local, state and 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.

• Install this unit only in a location and position as

specifi ed on page 4. This unit is designed only
for outdoor installations and should be located
with consideration of minimizing the length of
the supply and return ducts. Consideration
should also be given to the accessibility of
fuel, electric power, service access, noise,
and shade.

• 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.

sonal injury or death

.

GENERAL INFORMATION

Single packaged heat pumps are ready for easy
and immediate installation and can be readily
connected into the high static duct system of a
home. This unit is completely assembled, wired,
and run tested at the factory. This heat pump
is designed for outdoor installation only. The
only connections needed for installation are the
supply and return ducts, the line voltage, and
thermostat wiring. Use of components other than
those specifi ed may invalidate ARI Certifi cation,
Code Agency Listing, and limited warranty on
the air conditioner.

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 fi ns are
straight. If necessary, comb fi ns to remove
fl attened or bent fi ns. Claims for damage
(apparent or concealed) should be fi led
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.

• Choose an appropriate location that minimizes
the length of the supply and return air ducts.

• Overhead obstructions, poorly ventilated
areas, and areas subject to accumulation of
debris should be avoided.

• Suffi cient clearance for unobstructed airfl ow
through the outdoor coil must be maintained
in order to achieve rated performance. See
Figure 3 (page 6) for minimum clearances to
obstructions.

• Consideration should also be given to
availability of electric power, service access,
noise, and shade.

4

Air Duct System

Air ducts must 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 avaialable 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 suffi ciently
large to conduct an adequate amount of air to
each register. See Figure 4 (page 6).

• Duct work should be attached directly to the
unit fl anges for horizontal applications.

• If roof curb is installed, the ducts must be
attached to the curb hangers, not the unit.

• 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 fl ood back

Unconditioned Spaces
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.

The heat pump system will not cool or heat
the home if air is lost to the outside through
leaks in the duct system. Ducts that are
collapsed or restricted by foreign objects
will also prevent adequate air fl ow.

Condensate Drainage

A 3/4” condensate fi tting extends out of the side
of the unit (Figure 2). 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 fi tting,

forming a trap 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.

Elbow

P-Trap

Figure 2. Drain Trap

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 cylinders
and cause starting trouble. If unit has
been set on its side, restore to upright
position and do not run for several
hours. Then run unit for a few seconds.
Do this three or four times with fi ve

minutes between runs.

1. Remove the bands from around the unit.

2. Unfold the top and bottom cap fl anges.

3. Carefully remove the top cap and tube.

Minimum Clearances

Minimum clearances MUST be maintained from
adjacent structures to provide room for proper
servicing and air circulation. DO NOT install unit
in a confi ned or recessed area that will allow
discharge air from the unit to re-circulate into
the condenser air inlet, through the coil. See
Figure 3 (page 6).

Service Access Clearance:

Blower access panel side .......................... 24”

Electrical compartment access panel side .. . 12 ”
Clearance between overhang and

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 and Return Air Ducts .......................0”

Duct Connection side ..................................0”

5

12"

24"

TO BE

TOP OF UNIT

UNOBSTRUCTED

0"

12"

Figure 3. Minimum Unit Clearances

Installing Return & Supply Air Fittings

The supply and return fi ttings are included with
the unit and located in the supply duct. They
attach to the unit openings (Figure 4) with a fl ange
and bead arrangement and may be, secured
with two sheet metal screws. NOTE: For easier
access, install fi ttings before positioning unit in
fi nal location.

Return Duct

1. Align the slots with the holes in the collar and
install two screws.

2. Position the collar over the opening and align
the four notches in the collar with the four
dimples in the panel.

3. Using self-drilling screws (10-16x.5) attach
the collar to the rear panel.

Supply Duct

1. Position the supply duct collar so the edge of
the unit opening fi ts between the fl ange and
the bead.

Transition Duct Screws

Supply Air

14” Duct Dimples

Return Air

Figure 4. Return and Supply Air Fittings

2. Overlap the collar ends keeping the small
screw holes underneath.

3. Align the holes in the crimped area and install
one screw. NOTE: It may be necessary to
loosen the four screws that hold the transition
duct in order to install the supply fi tting. Re­tighten when installation is complete.

4. Tap collar (if necessary) to ensure engagement
with unit opening and install second screw.

5. Tighten fi rst screw and rotate collar clockwise
so joint is near three o’clock position.

Locating & Installing the Return Air Assembly

To simplify installation, locate and install the
return air assembly fi rst. If desired, the return
opening can be located inside a closet with
louvered doors that has an open area equal
to or greater than the 12” x 20” grille furnished.
The return air grille can be placed in the wall
of a closet and the air ducted into the fi lter box
through a boxed-in area at the closet fl oor level.

Make sure the fi lter is readily accessible.

MULTIPLE DUCT APPLICATIONSINGLE DUCT APPLICATION

Figure 5. Typical Duct Applications

6

NOTE: The return air box with grille and fi lter
(Figure 6) should not be located in heavy traffi c
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 subfl oor. Determine
how the fl oor 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 fl oor so that the box will fi t
between the fl oor 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 fi berboard directly
under the hole in the fl oor. However, if the fl oor
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. Put the fi lter and return air grille in place.

Locating & Installing the Supply Damper(s)

When locating the supply damper(s), carefully
check fl oor joists and frame members that could
interfere with the installation of the damper or
fl exible duct. Ideally, the damper (Figure 7) 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 fi berboard below the duct
at the desired location.

2. Cut a hole approximately 3/4” larger than the
damper opening in the fi berboard.

3. Cut a 9-1/8” x 13-1/8” hole in the duct and bend
over all tabs fl at on the inside of the heat duct.

4. Insert the damper into the duct and bend over
all tabs fl at on the inside of the heat duct.

5. Seal the opening between the fi berboard and
damper or fl exible duct.

AUTOMATIC DAMPER IS CLOSED

WHEN HEAT PUMP IS OFF

Figure 6. Return Air Box

Figure 7. Supply Damper

Connecting the Return and Supply Air
Flexible Ducts

• The return duct for all units is 14” diameter.

• The supply duct for all units is 12” diameter.

• The fl exible ducts can be connected to the
corresponding fi ttings with the clamps provided
with the ducts. NOTE: To prevent a loss in
cooling capacity, make sure all connections
are tight.

• The fl exible ducts may be cut to the required
length, see instructions packed with duct. Keep

all ducts as short and straight as possible.
Avoid sharp bends.

• Ducts may be spliced with sheet metal sleeves
and clamps.

• Once the inner duct is connected to the proper
fi tting, the insulation and plastic sleeve should
be pulled over the connection and clamped.

• Homes with multiple supply ducts (or special
applications), a Y fi tting is available to divide
the supply air so it can be ducted to different
areas of the home for more effi cient cooling.
NOTE: For maximum performance, insulate
the Y fi tting

7

ELECTRICAL CONNECTIONS

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.

• 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).

• See the unit wiring label for proper high and low
voltage wiring. Make all electrical connections
in accordance with all applicable codes and
ordinances.

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 transfor mer operation. For 208V operation,
remove the lead from the transformer ter minal
marked 240V and connect it to the terminal
marked 208V.

Pre-Electrical Checklist:

 Verify that the voltage, frequency, and phase

of the supply source match the specifi cations
on the unit rating plate.

 Verify that the service provided by the utility is

suffi cient 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 (Figures 15 - 16, pages
18 - 19). Inspect for loose connections.

Line Voltage

• It is recommended that the line voltage to the
unit be supplied from a dedicated branch circuit
containing the correct fuse or circuit breaker
for 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 fi eld wiring. 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 (Figure 8). Connect L1 and L2
directly to the contactor.

• 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.

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.

High Voltage

Low Voltage

Figure 8. Power Entry

8

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.

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.

2-Speed Outdoor Fan Motor
(Select Models)

If the unit utilizes a 2-speed condenser fan motor,
this motor will operate on low speed when in low
cooling/heating, and on high speed when in high
cooling/heating.

Blower Speed

For optimum system performance and comfort,
it may be necessary to change the factory speed
setting. See Table 4 (page 20) for factory settings.
NOTE: Q5RF models have High Effi ciency Motors
with 5 speed taps.

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.

1. Disconnect all electrical power to the unit and
remove the service panel.

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.

3. Verify the required speed from the airfl ow data
found in Table 4. Place appropriate wire on the
appropriate motor speed tap for the required
airfl ow.

4. Check all factory wiring per the unit wiring
diagram and inspect the factory wiring
connections to be sure none loosened during
shipping or installation.

Ambient Sensor Mounting

For optimum performance of the heat pump
system, the ambient sensor (Figure 9) must be
mounted on the outside of the unit.

1. Remove the mounting bracket and all
hardware included in the packet.

2. Remove star bushing from 7/8”
hole in corner panel of the unit.

3. Route the ambient sensor through the 7/8”
hole in the corner panel of the unit, and then
through the 7/8” hole in the mounting bracket.

4. Route the sensor through the
star bushing. Use the star bushing to
secure the mounting bracket to the unit.

5. Secure the ambient sensor inside the
plastic clip and secure it to the mounting
bracket with the screw and nut provided.

6. Install one spacer next between the
plastic clip and mounting bracket.

7. Bend the mounting bracket into position.
Install the mounting bracket to the unit
using the screw in the corner panel.

CAUTION:

Label all wires prior to disconnection
when servicing controls. Wiring
errors can cause improper and
dangerous operation. Verify proper
operation after servicing.

2. Locate the orange, black and red wires
terminated to the blower motor. The orange
wire controls the low speed cooling and heating
operations, the black wire controls high speed
cooling and heating operations and the red
wire controls the electric heating operation.

Nut

Bolt

Figure 9. Ambient Sensor Mounting

Nut

Ambient Sensor

Plastic Clip

Star Bushing

9

Demand Defrost Control

The demand defrost board controls the defrost
cycle in response to ambient temperature,
outdoor coil temperature and accumulated
compressor run time. The heat pump is allowed to
operate in the heating mode until the combination
of outdoor ambient and outdoor coil temperatures
indicate that defrosting is necessary, based on
the programmed defrost curve. There are four
preprogrammed defrost curves on the board. A
jumper pin is used to switch between the different
curves. The factory default setting is program
two. This is the recommended setting for most
standard applications. For differences between
the defrost curves, see Table 1.

The standard defrost cycle will terminate after
13 minutes and 39 seconds or when the coil
temperature reaches its terminate temperature,
whichever comes fi rst.

The defrost board is equipped with a 5 minute
Anti-Short Cycle Delay (ASCD). The compressor
will not turn on until the minimum 5 minute off
time is reached.

The control contains a forced - defrost feature,
which puts the system into defrost mode every 6
hours and 4 minutes, unless the coil temperature
is above the selected terminate temperature.

The system can be manually forced into defrost
mode at any time by shorting the TEST terminals
on the demand defrost board together for more
than 9 seconds. The coil temperature sensor
does not need to be cold when the unit is forced
into defrost. After the TEST input is removed, the
defrost mode will terminate in 13.7 minutes or
when the coil temperature is above the terminate
set-point or when the Y input is removed,
whichever occurs fi rst.

NOTE: If a demand curve is selected which has a
30 second compressor time delay in defrost, the
delayis reduced to 10 seconds in TEST mode.

Jumper

Position

120 40

220 40

320 32

420 75

Minimum Time

Between Defrosts

(min)

Terminate

Temp(° F)

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 fi eld installed.
See Specifi cations Sheet for available kits and
their application.

• Select the correct size heat package for the
installation.

• Follow installation instructions provided with
each heater kit.

• Installation is most easily accomplished before
making duct or electrical connections.

• Refer to Table 4 (page 20) for blower speeds.

Thermostat Connections

• The Q5RF heat pump is a two stage cooling
and heating appliance that requires a 2-stage
Cooling/Heating thermostat. The heat-cool
thermostat prevents simultaneous operation of
the heating and cooling units and is equipped
with an ON-AUTO fan mode that allows the
home owner to operate the indoor blower when
only air circulation is desired.

• 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.

• The low voltage wires must be properly
connected to the units low voltage terminal
block.

1. Route 24V control wires through the sealing
grommet (Figure 8, page 8) near the power
entrance.

2. Connect the control wires to the defrost
board and blower relay wire (Figure 10,
page 11).

• Several thermostat options are available
depending on the accessories installed with
the unit. Select a thermostat that operates in
conjunction with the installed accessories.

• The thermostat should be mounted about
5 feet above the fl oor 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
fi replaces, sunlight, or lighting fi xtures, and
convective heat from warm air registers or
electrical appliances. Refer to the thermostat
manufacturer’s instruction sheet for detailed
mounting information.

Table 1. Demand Defrost Curve Profi les

10

Green

(from blower relay)

G

W1

R

C

Y1

O

SUB-BASE

E

Y2

INDOOR THERMOSTAT

Typical Wiring (Field Supplied) for 2-Stage Cool, 1 Stage Electric Heat

Outdoor Thermostat

(optional)

Blower Relay

Compressor Solenoid

ECM Motor (if applicable)

AMBIENT

SENSOR

SENSOR

COIL

TEST

COILG

COIL

AMBG

LRCYO

DEFROST CONTROL

DEMAND

BOARD

W2

IN

OUT

W2

REV

VALV E

PRESS

SW

Y1 = 1st Stage Heat Pump

Y2 = 2nd Stage Heat Pump

W1 = 1st Stage Auxillary Heat

AMBIENT

COND FAN

M

Demand Defrost Board

Accessory

Heat Plug

1

Brown

2

Orange

3
4
5
6
7
8
9

(from blower relay)

G

W1

R

C

Y1

O

SUB-BASE

E

INDOOR THERMOSTAT

Y2

W2

Green

Blower Relay

Compressor Solenoid

ECM Motor (if applicable)

Y1 = 1st Stage Heat Pump

AMBIENT

Y2 = 2nd Stage Heat Pump

SENSOR

SENSOR

COIL

TEST

COILG

COIL

AMBG

LRCYO

DEFROST CONTROL

DEMAND

BOARD

W2

IN

OUT

W2

REV

VALV E

PRESS

SW

W1 = 1st Stage Auxillary Heat

W2 = 2nd Stage Auxillary Heat

AMBIENT

COND FAN

M

Demand Defrost Board

Accessory

Heat Plug

Brown

1

Orange

2
3
4
5
6
7

8
9

Outdoor Thermostat (optional)

Typical Wiring (Field Supplied) for 2-Stage Cool, 2-Stage Electric Heat

Figure 10. Typical Heat Pump Thermostat Connections

11

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 in Figure 3 (page 6)?

 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?

Start-Up Procedure

The control circuit consists of an anti-short cycle
timer that will not let the compressor re-start
before 5 minutes have elapsed.

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 ther mostat
operation and fi lter 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 ductwork for
leaks or obstruction if insuffi cient air is detected.

Set the thermostat fan mode to AUTO. The blower
should stop running.

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

1. Set the thermostat’s system mode to EM
HT and the fan mode to either AUTO
(intermittent air) or to ON (continuous air).

2. Set the thermostat’s temperature
selector above the existing room
temperature and check the following:

• The thermostat auxiliary heat light (RED) is

on.

• The AC 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 with

the Y input active and pressure switches
closed, the ACSD will be eliminated and the
compressor contactor output energizes within
2 seconds. When the TEST terminals are
shorted for more than 9 seconds with the Y
input active, 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.

• After the TEST input is removed, the defrost

mode will terminate in 13.7 minutes or less
or when the coil temperature is above the
terminate set point or when the thermostat Y
input is removed, whichever occurs fi rst.

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

12

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 as
described in the Forced Defrost Mode procedure
section.

Cooling Mode
When the TEST pins are shorted together for
more than 1 second, the Anti Short Cycle Timer
will be bypassed.

Adjustment of Refrigerant Charge

CAUTION:

This heat pump contains liquid
and gaseous refrigerant under
pressure. Adjustment of refrigerant
charge should only be attempted
by qualifi ed, 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.

• The unit must be charged while both fi rst and
second stages are operating.

• To achieve rated capacity and effi ciency 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. See
Refrigerant Charging Charts (Figures 11 - 14,
pages 14 & 15) for Charging in Cooling Mode.

Charging an R-410A Unit in AC Mode with
Outdoor Temperatures Above 65F

1. With the system operating at steady-

state, measure the liquid refrigerant
pressure in psig at the service valve.

2. Measure the liquid refrigerant

temperature (° F) at the service valve.

3. For the temperature measured, determine

the required liquid refrigerant pressure
from the appropriate charging charts.

• If the pressure measured in step 1 is greater
than the required liquid refrigerant pressure
determined in step 4, then there is too much
charge in the system. Remove refrigerant and
repeat steps 1 through 3 until the system is
correctly charged.

• If the pressure measured in step 1 is less
than the required liquid refrigerant pressure
determined in step 4, then there is too little
charge in the system. Add refrigerant and
repeat steps 1 through 3 until the system is
correctly charged.

Charging an R-410A Unit in Heating Mode

1. Evacuate the refrigerant system.

2. Weigh in the proper charge as shown on the
unit rating plate and use the Heating Charging
Tables 2 & 3 (pages 16 & 17) as a guide. Tables
refl ect conditions at high speed operation. Unit
charge MUST be verifi ed in cooling season.

3. Verify the unit is operating properly according
to the System Heating section on page 12.

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 fi lters 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 cooling season.
Remove any debris. Clean the outdoor coil and
louvers as necessary using a mild detergent
and water. Rinse thoroughly with water.

• Inspect the electrical connections for tightness

at the beginning of each heating and cooling
season. Service as necessary.

CAUTION:

The unit should never be operated
without a fi lter in the return air
system. Replace disposable fi lters
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.

13

Refrigerant Charging Charts for

LIQUID PRESSURE (PSIG)

LIQUID TEMP ERATURE (F)

Q5RF-X24K CHARGING CHART

LIQUID PRESSURE (PSIG)

LIQUID TEMP ERATURE (F)

Q5RF-X36K CHARGING CHART

Cooling Mode of Operation

600

575

550

525

500

475

450

425

400

375

350

325

300

275

250

225

200

70 75 80 85 90 95 100 105 110 115 120 125 130 135 140

Rem ove refrigerant when above curve

Add re fr ige rant w hen below cu rv e

Figure 11. Charging Chart for 2 ton Units

600

575

550

525

500

475

450

425

400

375

350

325

300

275

250

225

200

70 75 80 85 90 95 100 105 110 115 120 125 130 135 140

Rem ove refrigerant when above curve

Add re fr ige rant w hen below cu rv e

14

Figure 12. Charging Chart for 3 ton Units

Refrigerant Charging Charts for

LIQUID PRESSURE (PSIG)

LIQUID TEMP ERATURE (F)

Q5RF-X60K COOLING CHARGING CHART

LIQUID PRESSURE (PSIG)

LIQUID TEMP ERATURE (F)

Q5RF-X48K CHARGING CHART

Cooling Mode of Operation - Continued

600

575

550

525

500

475

450

425

400

375

350

325

300

275

250

225

200

70 75 80 85 90 95 100 105 110 115 120 125 130 135 140

Rem ove refrigerant when above curve

Add re fr ige rant w hen below cu rv e

Figure 13. Charging Chart for 4 ton Units

600

575

550

525

500

475

450

425

400

375

350

325

300

275

250

225

200

70 75 80 85 90 95 100 105 110 115 120 125 130 135 140

Rem ove refrigerant when above curve

Add re fr ige rant w hen below cu rv e

Figure 14. Charging Chart for 5 ton Units

15

359 177

129

328 158

114

297 139

99

373 165

131

342 149

116

311 134

101

406 201

128

371 177

111

335 153

94

420 188

130

385 168

113

349 147

96

Q5RF-X24K

OUTDOOR TEMPERATURE (DEG. F)

Refrigerant Charging Chart Legend for Heating Mode of Operation:

275 129

84

257 127

69

238 124

54

283 125

86

266 123

71

249 120

56

Q5RF-X36K

OUTDOOR TEMPERATURE (DEG. F)

304 135

79

270 123

65

236 110

52

312 131

81

280 119

67

248 106

54

Table 2. Refrigerant Charging Tables for Heating Mode of Operation - 2 & 3 Ton Units

16

Shaded boxes indicate fl ooded conditions.

vary.

Rated design values. The suction pressure will vary from design value if outdoor air fl ow, entering dry bulb, or entering wet bulb temperatures

0 102030405060

1. All pressures are listed psig and all temperatures in °F

2. Discharge temperatures greater than charted values indicate an undercharged system.

Suc. Liquid Disch. Suc. Liquid Disch. Suc. Liquid Disch. Suc. Liquid Disch. Suc. Liquid Disch. Suc. Liquid Disch. Suc. Liquid Disch.

Press Press. Temp. Press. Press. Temp. Press. Press. Temp. Press. Press. Temp. Press. Press. Temp. Press. Press. Temp. Press. Press. Temp.

37 205 126 52 226 128 67 247 131 82 268 133 97 283 145 112 314 167 127 345 189

38 212 124 53 232 126 68 252 129 83 272 131 98 290 142 113 321 163 128 352 183

219 122

39

40 226 120 55 244 122 70 261 125 85 279 127 100 304 137 115 335 154 130 366 171

233 118

41

42 240 116 57 255 118 72 271 121 87 286 123 102 318 131 117 349 145 132 380 158

43 247 114 58 261 116 73 276 119 88 290 121 103 325 128 118 356 140 133 387 152

0 102030405060

Suc. Liquid Disch. Suc. Liquid Disch. Suc. Liquid Disch. Suc. Liquid Disch. Suc. Liquid Disch. Suc. Liquid Disch. Suc. Liquid Disch.

Press Press. Temp. Press. Press. Temp. Press. Press. Temp. Press. Press. Temp. Press. Press. Temp. Press. Press. Temp. Press. Press. Temp.

37 188 102 50 224 114 63 261 127 77 297 139 92 321 159 109 357 186 126 392 213

38 195 100 51 230 112 64 265 125 78 301 137 93 328 156 110 364 181 127 399 207

202 98

39

40 209 96 53 242 108 66 275 121 80 308 133 95 342 150 112 378 172 129 413 195

216 94

41

42 223 92 55 254 104 68 284 117 82 315 129 97 356 144 114 392 163 131 427 182

43 230 90 56 260 102 69 289 115 83 319 127 98 363 142 115 399 159 132 434 176

375 169

118

337 161

106

300 152

93

389 157

120

351 152

108

314 146

95

426 179

124

372 160

109

318 142

94

440 167

126

386 152

111

332 137

96

Q5RF-X48K

OUTDOOR TEMPERATURE (DEG. F)

Refrigerant Charging Chart Legend for Heating Mode of Operation:

284 149

79

282 151

63

279 153

47

291 145

81

291 147

65

291 149

49

Q5RF-X60KK

OUTDOOR TEMPERATURE (DEG. F)

284 128

78

262 119

63

241 109

48

291 124

80

272 115

65

253 105

50

Table 3. Refrigerant Charging Tables for Heating Mode of Operation - 4 & 5 Ton Units

Shaded boxes indicate fl ooded conditions.

vary.

Rated design values. The suction pressure will vary from design value if outdoor air fl ow, entering dry bulb, or entering wet bulb temperatures

0 102030405060

1. All pressures are listed psig and all temperatures in °F

2. Discharge temperatures greater than charted values indicate an undercharged system.

Suc. Liquid Disch. Suc. Liquid Disch. Suc. Liquid Disch. Suc. Liquid Disch. Suc. Liquid Disch. Suc. Liquid Disch. Suc. Liquid Disch.

Press Press. Temp. Press. Press. Temp. Press. Press. Temp. Press. Press. Temp. Press. Press. Temp. Press. Press. Temp. Press. Press. Temp.

29 263 160 45 268 157 61 272 155 77 276 153 91 286 158 104 323 170 116 361 181

30 270 158 46 273 155 62 277 153 78 280 151 92 293 155 105 330 165 117 368 175

277 156

31

32 284 154 48 285 151 64 286 149 80 287 147 94 307 149 107 344 156 119 382 163

291 152

33

34 298 150 50 297 147 66 296 145 82 295 143 96 321 144 109 358 147 121 396 151

35 305 148 51 303 145 67 301 143 83 298 141 97 328 141 110 365 143 122 403 144

0 102030405060

Suc. Liquid Disch. Suc. Liquid Disch. Suc. Liquid Disch. Suc. Liquid Disch. Suc. Liquid Disch. Suc. Liquid Disch. Suc. Liquid Disch.

Press Press. Temp. Press. Press. Temp. Press. Press. Temp. Press. Press. Temp. Press. Press. Temp. Press. Press. Temp. Press. Press. Temp.

31 205 104 46 229 113 61 253 123 76 277 132 92 304 148 107 358 169 122 412 191

32 212 102 47 235 111 62 258 121 77 280 130 93 311 145 108 365 165 123 419 185

219 100

33

34 226 98 49 247 170 64 267 117 79 288 126 95 325 139 110 379 156 125 433 173

233 96

35

36 240 94 51 258 103 66 277 113 81 295 122 97 339 134 112 393 147 127 447 160

37 247 92 52 264 101 67 282 111 82 299 120 98 346 131 113 400 143 128 454 154

17

9

ORANGE

WIRE

BLACK

WIRE

RED

WIRE

X24K T2

T3 T4

T3 T4

876

GREY

0110

7110650

432

5

YELLOW

1

BROWN

ORANGE

YELLOW

60HZ/SINGLE PHASE

GREEN / YELLOW

G

MOTOR

2. Employez uniquement des conducteurs en cuiver.

3. Ne convient pas aux installations de plus de 150V a la terre.

SEE TABLE FOR FACTORY

SET BLOWER WIRING

BLOWER

T1

T2

RED

BLACK

(24V)

HIGH SPEED

BLOWER RELAY

3. Not sutiable on systems that exceed 150V to ground.

4. For replacement wires use conductors suitable for 105°C.

208/230VQ5RF/PPH2RF SERIES SMALL PACKAGE H/P W/DEMAND DEFROST

1. Couper le courant avant de faire letretine.

N

L

C

T4

T3

ORANGE

GREY

GREEN

T5

BLOWER

TO “G” ON

YELLOW

T-STAT

TO “W3” ON

SWITCH

LOW PRESSURE

(SELECT MODELS ONLY)

BLACK

BLUE

RED

RELAY

T-STAT

RED

WHITE

BLACK

YELLOW

COMPRESSOR

CONTACTOR

L1

L2

BLACK

BLACK

YELLOW

T1

T2

BLUE

M

PRESS

FAN

COND

AMBIENT

AMBG

BOARD

DEMAND

DEFROST CONTROL

COIL

BLACK

BLUE

YELLOW / BLACK

YELLOW / BLACK

SW

COILG

W2

W2

TEST

BLACK

REV

OUT

IN

O

Y

C

LR

FACTORY SET INDOOR MOTOR WIRING

SWITCH

HIGH PRESSURE

COIL

REVERSING VALVE

BLACK

VALV E

BLACK

TO T-STAT

MODE L

ORANGE

BLACK

X36K T1

BLACK WIRE IS HIGH SPEED COOLING/HEATING

ORANGE WIRE IS LOW SPEED COOLONG/HEATING

YELLOW

DAUL

COMPRESSOR

C

BLUE

R

OUTDOOR

MOTOR

BLUE

BLUE

RED WIRE IS AUX. HEATING SPEED (ELECTRIC HEAT)

REFER TO INSTALLATION INSTRUCTIONS FOR CFM DATA

CAPACITOR

YELLOW

¢711065«¤

F

C

H

RED

S

R

BLUE

S

C

RED

TO “Y2”

ON

T-STAT

LEGEND:

FIELD WIRING

LOW VOLTAGE

HIGH VOLTAGE

WIRING DIAGRAM

2 TON AND 3 TON

1. Disconnect all power before servicing.

NOTES:

2. For supply connections use copper conductors only.

which uses “G” to call for blower.

3. Not sutiable on systems that exceed 150V to ground.

4. For replacement wires use conductors suitable for 105°C.

5. Unit requires a two stage cooling/heating thermostat

COM

TRASFORMER

240V

24V

THERMISTOR

AMBIENT
RED

COIL

3 AMP FUSE

THERMISTOR

Figure 15. Q5RF/PPH2RF Series Wiring Diagram - 2 & 3 Ton Units

18

9

ORANGE

WIRE

BLACK

WIRE

RED

WIRE

T4 T3

T4 T3

876

0110

7110660

4

5

321

YELLOW

GREY

YELLOW

60HZ/SINGLE PHASE

GREEN / YELLOW

N

L

G

C

MOTOR

BLOWER

208/230V

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.

SET BLOWER WIRING

SEE TABLE FOR FACTORY

T1

BLACK

T2

RED

T4

T3

ORANGE

BLOWER

GREY

T5

RELAY

RED

ORANGE

BLUE

BROWN

T-STAT

TO “W3” ON

LOW PRESSURE

CONTACTOR

COMPRESSOR

L1

L2

SWITCH

(SELECT MODELS ONLY)

T1

T2

BLUE

YELLOW

YELLOW / BLACK

X48K T1

X60K T2

MODE L

FACTORY SET INDOOR MOTOR WIRING

SWITCH

HIGH PRESSURE

YELLOW

BLUE

YELLOW / BLACK

BLACK

BLACK

BLUE

COIL

REVERSING VALVE

BLACK

BLACK WIRE IS HIGH SPEED COOLING/HEATING

ORANGE WIRE IS LOW SPEED COOLONG/HEATING

RED WIRE IS AUX. HEATING SPEED (ELECTRIC HEAT)

REFER TO INSTALLATION INSTRUCTIONS FOR CFM DATA

CAPACITOR

DAUL

YELLOW

COMPRESSOR

C

¢711066#¤

F

C

H

RED

S

R

YELLOW

WIRING DIAGRAM

Q5RF/PPH2RF SERIES SMALL PACKAGE H/P W/DEMAND DEFROST

4 TON AND 5 TON

NOTES:

1. Disconnect all power before servicing.

Figure 16. Q5RF/PPH2RF Series Wiring Diagram - 4 & 5 Ton Units

(24V)

HIGH SPEED

BLOWER RELAY

GREEN

TO “G” ON

2. For supply connections use copper conductors only.

3. Not sutiable on systems that exceed 150V to ground.

5. Unit requires a two stage cooling/heating thermostat

which uses “G” to call for blower.

4. For replacement wires use conductors suitable for 105°C.

T-STAT

BLACK

RED

WHITE

BLACK

COM

TRASFORMER

240V

BLACK

BLACK

24V

M

DF2

DF1

AMBIENT

AMBIENT

RED

PRESS

AMBG

THERMISTOR

BOARD

DEMAND

DEFROST CONTROL

COIL

3 AMP FUSE

SW

COILG

REV

W2

W2

COIL

OUT

IN

O

Y

C

LR

THERMISTOR

BLUE

T-STAT

Y1

L1

LEGEND:

WHITE

Y2

L2

C

ECM

MOTOR

OUTDOOR

FIELD WIRING

LOW VOLTAGE

HIGH VOLTAGE

BLACK

VALV E

YELLOW

BLACK

BROWN

BLUE

TO T-STAT

BLUE

BLUE

RED

ON

TO “Y2”

19

COMPONENT FUNCTIONS

Low Pressure Switch

The low pressure 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.

High Pressure Switch

The high pressure switch is factory installed
and located in the compressor discharge line
internal to the unit. The switch is designed to de­energize the system when very high pressures
occur during abnormal conditions. Under normal
conditions, the switch is closed.

If the suction pressure falls below 5 psig, then
the switch will open and de-energize the unit. The
switch will close again once the suction pressure
increases above 20 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.

Model Q5RF Wire Color/Speed Tap Motor Speed

T1 Low 560

Orange/T2 Medium/Low* 600

X24K

X36K

X48K

X60K

Black/T3 Medium** 800

Red/T4 Medium/High*** 1,040

T5 High 1,250

Orange/T1 Low* 600

T2 Medium/Low 750

Black/T3 Medium** 1,200

Red/T4 Medium/High*** 1,420

T5 High 1,520

Orange/T1 Low* 1,030

T2 Medium/Low 1,240

Red/T3 Medium*** 1,400

Black/T4 Medium/High** 1,530

T5 High 1,680

Orange/T1 Low 1,060

T2 Medium/Low* 1,200

Red/T3 Medium*** 1,500

Black/T4 Medium/High** 1,760

T5 High 1,970

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.

Air Flow

(@ 0.3 in WC)

* Denotes Factory Set Low Speed Cooling/ Heating

** Denotes Factory Set High Speed Cooling/ Heating

*** Denotes Factory Set Electric Heating Speed

Table 4. Motor Lead Connection

INSTALLER: PLEASE LEAVE THESE INSTALLATION INSTRUCTIONS WITH THE HOMEOWNER.

O’Fallon, MO

¢709158D¤

7091580

Specifi cations and illustrations

subject to change without

notice or incurring obligations.

Printed in U.S.A. (02/10)

7091580