Q5RF SERIES
15 SEER
USER’s MANUAL & INSTALLATION INSTRUCTIONS
Single Package Heat Pump - 2 Stage, R-410A
IMPORTANT
Pleasereadthisinformationthoroughlyandbecomefamiliarwiththecapabilities
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 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.
DO NOT DESTROY. PLEASE READ CAREFULLY AND
KEEP IN A SAFE PLACE FOR FUTURE REFERENCE.
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USER INFORMATION
ABOUT THE HEAT PUMP
minutes following a previous operation or the
interruption of the main electrical power.
Your heat pump is a unique, all weather comfort-
control 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.
Emergency Heat
Some thermostats may include a system mode
called EM HT or AUX HT, etc. This is a back-
up 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.Sustaineduseofelectricresistanceheatin
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.
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 efficient process means you only pay for
“moving”theheatfromtheoutdoorstotheindoor
area.You do not pay to generate the heat, as is
the case with more traditional furnace designs.
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
steammayrisefromtheoutdoorunitasthewarm
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
Duringsummer, theheatpumpreversestheflow
of the heat-absorbing refrigerant to become an
energy-efficient, 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. approximately 30 seconds the compressor will
See Figure 1
start up again and continue normal operation.
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.
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.
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
maintaintheindoortemperatureatthedesired
heating level.
NOTE:If the temperature level is re-adjusted, or
thesystemmodeisreset,thefanandcompressor
in the outdoor unit may not start immediately. A
protective timer circuit holds the compressor
and the outdoor fan off for approximately three
System Temperature
Mode Selector
Fan
Mode
Figure 1. Digital Thermostat
3
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INSTALLER INFORMATION
GENERAL INFORMATION
SAFETY 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
thermostatwiring.Useofcomponentsotherthan
those specified may invalidate ARI Certification,
Code Agency Listing, and limited warranty on
the air conditioner.
WARNING:
The information listed below
must be followed during the
installation,service,andoperation
ofthisunit.Unqualifiedindividuals
should not attempt to interpret
these instructions or install this
equipment.Failuretofollowsafety
recommendations could result in
possibledamagetotheequipment,
BeforeYou Install this Unit
The cooling load of the area to be conditioned
mustbecalculatedandasystemoftheproper
capacity selected.It is recommended that the
areatobeconditionedbecompletelyinsulated
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
shipmentanduponarrivalshouldbecarefully
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
(apparent or concealed) should be filed
immediately with the carrier.
serious personal injury or death
.
• 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
refrigerantunderhighpressure.Installationor
servicingshouldonlybeperformedbyqualified
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
theCanadianElectricCodePart1CSAC.22.1.
• Installthisunitonlyinalocationandpositionas
specified on page 4.This unit is designed only
foroutdoorinstallationsandshouldbelocated
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.
• Followallprecautionsintheliterature,ontags,
and on labels provided with the equipment.
Read and thoroughly understand the
instructionsprovidedwiththeequipmentprior
to performing the installation and operational
checkout of the equipment.
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.
• Chooseanappropriatelocationthatminimizes
the length of the supply and return air ducts.
• Overhead obstructions, poorly ventilated
areas, and areas subject to accumulation of
debris should be avoided.
• Sufficient clearance for unobstructed airflow
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
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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),“StandardforInstallationofResidenceType
WarmAirHeatingandAirConditioningSystems”
(NFPA90B),theseinstructions,andallapplicable
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).
• Thesupplyductsystem,includingthenumber
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 4 (page 6).
• Duct work should be attached directly to the
unit flanges 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 flood back
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.Thenrununitforafewseconds.
Do this three or four times with five
minutes between runs.
Unconditioned Spaces
1. Remove the bands from around the unit.
2. Unfold the top and bottom cap flanges.
3. Carefully remove the top cap and tube.
All duct work passing through unconditioned
spacemustbeproperlyinsulatedtominimizeduct
lossesandpreventcondensation.Useinsulation
with an outer vapor barrier. Refer to local codes
for insulation material requirements.
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 confined 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).
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 flow.
Condensate Drainage
Service Access Clearance:
A 3/4” condensate fitting 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. Connectthecondensatetubingontothefitting,
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.
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:
CombustibleBase(WoodorClassA, B, orC
roof Covering material) ...............................0”
Supply and Return Air Ducts.......................0”
Duct Connection side..................................0”
5
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12"
12"
24"
0"
Supply Air
Return Air
Figure 3. Minimum Unit Clearances
Installing Return & Supply Air Fittings
Figure 4. Return and Supply Air Fittings
The supply and return fittings are included with
the unit and located in the supply duct. They
attachtotheunitopenings(Figure4)withaflange
and bead arrangement and may be, secured
with two sheet metal screws. NOTE: For easier
access, install fittings before positioning unit in
final location.
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 fitting. Re-
tighten when installation is complete.
4. Tapcollar(ifnecessary)toensureengagement
with unit opening and install second screw.
5. Tighten first screw and rotate collar clockwise
so joint is near three o’clock position.
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.
Locating&InstallingtheReturnAirAssembly
To simplify installation, locate and install the
return air assembly first. 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 filter box
through a boxed-in area at the closet floor level.
Make sure the filter is readily accessible.
Supply Duct
1. Position the supply duct collar so the edge of
the unit opening fits between the flange and
the bead.
SINGLE DUCT APPLICATION
MULTIPLE DUCT APPLICATION
Figure 5.Typical Duct Applications
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NOTE: The return air box with grille and filter
(Figure 6) 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.
Locating & Installing the Supply Damper(s)
When locating the supply damper(s), carefully
check floor joists and frame members that could
interfere with the installation of the damper or
flexibleduct.Ideally,thedamper(Figure7)should
belocatedinthebottomofthemainduct,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
sideofthehomewheretheheatpumpislocated.
1. Start the installation from under the home by
cutting a small hole in the subfloor.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
whencuttingthroughcarpetingtoavoidsnags.
NOTE:Inmostinstallationsitwillbenecessary
to cut a similar hole in the fiberboard directly
undertheholeinthefloor.However, ifthefloor
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.
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. Cuta9-1/8”x13-1/8”holeintheductandbend
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.
3. Set the box into the opening and fasten with
screws or nails.
4. Put the filter and return air grille in place.
AUTOMATIC DAMPER IS CLOSED
WHEN HEAT PUMP IS OFF
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 flexible ducts can be connected to the
correspondingfittingswiththeclampsprovided
with the ducts. NOTE: To prevent a loss in
cooling capacity, make sure all connections
are tight.
Figure 6. Return Air Box
• The flexible ducts may be cut to the required
length,seeinstructionspackedwithduct.Keep
all ducts as short and straight as possible.
Avoid sharp bends.
• Ductsmaybesplicedwithsheetmetalsleeves
and clamps.
• Oncetheinnerductisconnectedtotheproper
fitting,theinsulationandplasticsleeveshould
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
7
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ELECTRICAL CONNECTIONS
• Seetheunitwiringlabelforproperhighandlow
voltagewiring.Makeallelectricalconnections
in accordance with all applicable codes and
ordinances.
WARNING:
To avoid electric shock, personal
injury,ordeath,turnofftheelectric
poweratthedisconnectorthemain
service panel before making any
electrical connections.
CAUTION:
Label all wires prior to
disconnection when servicing
controls. Wiring errors can
cause improper and dangerous
operation.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).
• Unitsareshippedfromthefactorywiredfor240
volttransformeroperation.For208Voperation,
removetheleadfromthetransformerterminal
marked 240V and connect it to the terminal
marked 208V.
Pre-Electrical Checklist:
Grounding
Verify that the voltage, frequency, and phase
of the supply source match the specifications
on the unit rating plate.
WARNING:
Verify that the service provided by the utility is
sufficienttohandletheadditionalloadimposed
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.
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!
Line Voltage
• It is recommended that the line voltage to the
unitbesuppliedfromadedicatedbranchcircuit
containing the correct fuse or circuit breaker
for the unit.
• An electrical disconnect must be located
withinsightofandreadilyaccessibletothe
unit.Thisswitchshallbecapableofelectrically
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.
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.
• Providepowersupplyfortheunitinaccordance
withtheunitwiringdiagram,andtheunitrating
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.
High Voltage
Low Voltage
• Useonlycopperwireforthelinevoltagepower
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 8. Power Entry
8
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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
determinethereason.Donotarbitrarilyinstall
a larger fuse or breaker and do not, in any
case, exceed the maximum size listed on the
data label of the unit.
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. Verifytherequiredspeedfromtheairflowdata
foundinTable4.Placeappropriatewireonthe
appropriate motor speed tap for the required
airflow.
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.
2-Speed Outdoor Fan Motor
(Select Models)
Iftheunitutilizesa2-speedcondenserfanmotor,
this motor will operate on low speed when in low
cooling/heating, and on high speed when in high
cooling/heating.
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.
Blower Speed
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.
For optimum system performance and comfort,
it may be necessary to change the factory speed
setting.SeeTable4(page20)forfactorysettings.
NOTE:Q5RFmodelshaveHighEfficiencyMotors
with 5 speed taps.
WARNING:
To avoid electric shock, personal
injury,ordeath,turnofftheelectric
poweratthedisconnectorthemain
service panel before making any
electrical connections.
1. Disconnect all electrical power to the unit and
remove the service panel.
CAUTION:
Nut
Labelallwirespriortodisconnection
when servicing controls. Wiring
errors can cause improper and
dangerousoperation.Verifyproper
operation after servicing.
Nut
Bolt
Ambient Sensor
Plastic Clip
Star Bushing
2. Locate the orange, black and red wires
terminated to the blower motor. The orange
wirecontrolsthelowspeedcoolingandheating
operations, theblackwirecontrolshighspeed
cooling and heating operations and the red
wire controls the electric heating operation.
Figure 9. Ambient Sensor Mounting
9
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Demand Defrost Control
Electric Heat Package (optional)
This heat pump is shipped without an auxiliary
electricheatkitinstalled.Ifelectricheatisdesired,
an accessory Heater Kit must be field installed.
See Specifications Sheet for available kits and
their application.
• Select the correct size heat package for the
installation.
• Follow installation instructions provided with
each heater kit.
The demand defrost board controls the defrost
cycle in response to ambient temperature,
outdoor coil temperature and accumulated
compressorruntime.Theheatpumpisallowedto
operateintheheatingmodeuntilthecombination
ofoutdoorambientandoutdoorcoiltemperatures
indicate that defrosting is necessary, based on
the programmed defrost curve. There are four
preprogrammed defrost curves on the board. A
jumperpinisusedtoswitchbetweenthedifferent
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.
• Installationismosteasilyaccomplishedbefore
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
thermostatpreventssimultaneousoperationof
the heating and cooling units and is equipped
with an ON-AUTO fan mode that allows the
homeownertooperatetheindoorblowerwhen
only air circulation is desired.
• Thecontrolcircuitwiringmustcomplywiththe
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 standard defrost cycle will terminate after
13 minutes and 39 seconds or when the coil
temperature reaches its terminate temperature,
whichever comes first.
The defrost board is equipped with a 5 minute
Anti-ShortCycleDelay(ASCD).Thecompressor
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
hoursand4minutes,unlessthecoiltemperature
is above the selected terminate temperature.
The system can be manually forced into defrost
modeatanytimebyshortingtheTESTterminals
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
intodefrost.AftertheTESTinputisremoved, the
defrost mode will terminate in 13.7 minutes or
whenthecoiltemperatureisabovetheterminate
set-point or when the Y input is removed,
whichever occurs first.
• The low voltage wires must be properly
connected to the units low voltage terminal
block.
1. Route24Vcontrolwiresthroughthesealing
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 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.
NOTE:Ifademandcurveisselectedwhichhasa
30 second compressor time delay in defrost, the
delayis reduced to 10 seconds in TEST mode.
Minimum Time
Between Defrosts
(min)
Jumper
Position
Terminate
Temp(° F)
1
2
3
4
20
20
20
20
40
40
32
75
Table 1. Demand Defrost Curve Profiles
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Outdoor Thermostat
(optional)
Y1 = 1st Stage Heat Pump
Y2 = 2nd Stage Heat Pump
W1 = 1st Stage Auxillary Heat
Green
(from blower relay)
G
W1
R
Accessory
Heat Plug
C
Y1
1
2
Brown
O
Orange
3
4
5
6
7
8
9
E
Y2
Blower Relay
Compressor Solenoid
ECM Motor (if applicable)
Demand Defrost Board
Typical Wiring (Field Supplied) for 2-Stage Cool, 1 Stage Electric Heat
Y1 = 1st Stage Heat Pump
Y2 = 2nd Stage Heat Pump
W1 = 1st Stage Auxillary Heat
W2 = 2nd Stage Auxillary Heat
Green
(from blower relay)
G
W1
Accessory
Heat Plug
R
C
Y1
Brown
1
O
E
Orange
2
3
4
5
6
7
8
Y2
W2
Blower Relay
Compressor Solenoid
Demand Defrost Board
9
ECM Motor (if applicable)
Outdoor Thermostat (optional)
Typical Wiring (Field Supplied) for 2-Stage Cool, 2-Stage Electric Heat
Figure 10.Typical Heat Pump Thermostat Connections
11
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STARTUP & ADJUSTMENTS
Pre-Start Checklist
Thefollowingchecklistshouldbeobservedprior
temperature selector below the existing room
temperature.Allowthecoolingsystemtooperate
for several minutes and check for the discharge
of cool air at the supply registers.
to starting the unit.
Istheunitlevel?Unitshouldbelevelorslightly
slantedtowardthedrainforpropercondensate
drainage.
Is the unit installed with the proper clearances
as listed in Figure 3 (page 6)?
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.
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?
Isthethermostatwiredcorrectly?Isitinstalled
in a proper location?
Emergency Heat
Start-Up Procedure
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 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.
• The AC compressor and the fan should not
run; low voltage circuit remains energized.
• Theblowerrunsaccordingtothethermostat’s
fan mode setting.
5. Verify the discharge air grilles are adjusted
and the system air is balanced.
Forced Defrost Mode (Field Test)
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.
• When the TEST terminals are shorted with
the Y input active and pressure switches
closed, the ACSD will be eliminated and the
compressorcontactoroutputenergizeswithin
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.
9. Instructthehomeowneronunitandthermostat
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 ductwork for
leaks or obstruction if insufficient air is detected.
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 first.
SetthethermostatfanmodetoAUTO.Theblower
should stop running.
System Heating
Anti Short Cycle Timer Test
Set the thermostat system mode to HEAT and
the fan mode to AUTO. Change the thermostat
temperature selector above the existing room
temperatureandcheckforthedischargeofwarm
air at the supply registers.
The5minutetimedelayfeaturecanbebypassed
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
describedintheForcedDefrostModeprocedure
section.
System Cooling
Set the thermostat’s system mode to COOL and
the fan mode to AUTO. Change the thermostat
12
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Cooling Mode
Charging an R-410A Unit in Heating Mode
When the TEST pins are shorted together for
more than 1 second, the Anti Short Cycle Timer
will be bypassed.
1. Evacuate the refrigerant system.
2. Weigh in the proper charge as shown on the
unitratingplateandusetheHeatingCharging
Tables2&3(pages16&17)asaguide.Tables
reflectconditionsathighspeedoperation.Unit
charge MUST be verified in cooling season.
3. Verify the unit is operating properly according
to the System Heating section on page 12.
Adjustment of Refrigerant Charge
CAUTION:
This heat pump contains liquid
and gaseous refrigerant under
pressure.Adjustmentofrefrigerant
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.
Failuretocomplywiththiswarning
couldresultinequipmentdamage,
personal injury, or death.
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
mayhavemorethanoneelectrical
supply.
Proper maintenance is important to achieve
optimum performance from the heat pump.The
ability to properly perform maintenance on this
equipmentrequirescertainmechanicalskillsand
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:
• The unit must be charged while both first and
second stages are operating.
• 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. See
Refrigerant Charging Charts (Figures 11 - 14,
pages 14 & 15) for Charging in Cooling Mode.
• Inspect and clean or replace air filters at the
beginningofeachheatingandcoolingseason,
or more frequently if required.
Charging an R-410A Unit in AC Mode with
Outdoor Temperatures Above 65F
• Inspect the condensate drain and outdoor
coil at the beginning of each cooling season.
Removeanydebris.Cleantheoutdoorcoiland
louvers as necessary using a mild detergent
and water. Rinse thoroughly with water.
• Inspecttheelectricalconnectionsfortightness
at the beginning of each heating and cooling
season. Service as necessary.
1. With the system operating at steady-
state, measure the liquid refrigerant
pressure in psig at the service valve.
2. Measure the liquid refr igerant
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
chargeinthesystem.Removerefrigerantand
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.
CAUTION:
The unit should never be operated
without a filter in the return air
system.Replacedisposablefilters
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
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Refrigerant Charging Charts for
Cooling Mode of Operation
Q5RF-X24K CHARGINGCHART
600
575
550
525
500
475
450
425
400
375
350
325
300
275
250
225
200
Rem ove refrigerant when above curve
Add refrigerant when below curve
70
75
80
85
90
95
100
105
110
115
120
125
130
135
140
LIQUID TEMPERATURE (F)
Figure 11. Charging Chart for 2 ton Units
Q5RF-X36K CHARGINGCHART
600
575
550
525
500
475
450
425
400
375
350
325
300
275
250
225
200
Rem ove refrigerant when above curve
Add refrigerant when below curve
70
75
80
85
90
95
100
105
110
115
120
125
130
135
140
LIQUID TEMPERATURE (F)
Figure 12. Charging Chart for 3 ton Units
14
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Refrigerant Charging Charts for
Cooling Mode of Operation - Continued
Q5RF-X48K CHARGINGCHART
600
575
550
525
500
475
450
425
400
375
350
325
300
275
250
225
200
Rem ove refrigerant when above curve
Add refrigerant when below curve
70
75
80
85
90
95
100
105
110
115
120
125
130
135
140
LIQUID TEMPERATURE (F)
Figure 13. Charging Chart for 4 ton Units
Q5RF-X60K COOLINGCHARGINGCHART
600
575
550
525
500
475
450
425
400
375
350
325
300
275
250
225
200
Rem ove refrigerant when above curve
Add refrigerant when below curve
70
75
80
85
90
95
100
105
110
115
120
125
130
135
140
LIQUID TEMPERATURE (F)
Figure 14. Charging Chart for 5 ton Units
15
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16
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17
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W
Y E L L O
W
Y E L L O
C K B L A
W
Y E L L O
B L U E
O R
T H E R M I S T
A M B I E N T
R E D
O R
T H E R M I S T
C O I L
3 A M P F U S E
Figure 15. Q5RF/PPH2RF Series Wiring Diagram - 2 & 3 Ton Units
18
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W
Y E L L O
C K B L A
W
Y E L L O
B L U E
B L U E
R O
T H E R M I S T
R O
T H E R M I S T
C O I L
A M B I E N T
R E D
3 A M P F U S E
Figure 16. Q5RF/PPH2RF Series Wiring Diagram - 4 & 5 Ton Units
19
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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 de-
energize the system when very high pressures
occurduringabnormalconditions.Undernormal
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
thencloses,therewillbea5minuteshortcycling
delay before the unit can energize.
If the suction pressure falls below 5 psig, then
theswitchwillopenandde-energizetheunit.The
switchwillcloseagainoncethesuctionpressure
increases above 20 psig. The low pressure
switchinterruptsthethermostatinputstotheunit.
NOTE:When the switch opens and then closes,
therewillbea5minuteshortcyclingdelaybefore
the unit can energize.
Air Flow
Motor Speed
Model Q5RF
Wire Color/Speed Tap
(@ 0.3 in WC)
T1
Orange/T2
Black/T3
Red/T4
T5
Low
Medium/Low*
Medium**
Medium/High***
High
560
600
800
X24K
1,040
1,250
600
Orange/T1
T2
Low*
Medium/Low
Medium**
Medium/High***
High
750
X36K
X48K
X60K
Black/T3
Red/T4
T5
1,200
1,420
1,520
1,030
1,240
1,400
1,530
1,680
1,060
1,200
1,500
1,760
1,970
Orange/T1
T2
Low*
Medium/Low
Medium***
Medium/High**
High
Red/T3
Black/T4
T5
Orange/T1
T2
Low
Medium/Low*
Medium***
Medium/High**
High
Red/T3
Black/T4
T5
* 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.
7091580
¢709158D¤
Specifications and illustrations
subject to change without
notice or incurring obligations.
Printed in U.S.A. (02/10)
7091580
O’Fallon, MO
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