Intertherm Q3RX Installation guide

Intertherm
Brand
Intertherm
Model
Q3RX
Category
Heat pumps
Type
Installation guide
13 SEER
Single Package Heat Pump - Single Stage, R-22
Q3RX EXPORT SERIES
DO NOT DESTROY. PLEASE READ CAREFULLY AND KEEP IN A SAFE PLACE FOR FUTURE REFERENCE.
IMPORTANT
ATTENTION INSTALLERS:
It is your responsibility to know this product better than your customer. This includes being
able to install the product according to strict safety guidelines and instructing the customer on
how to operate and maintain the equipment for the life of the product. Safety should always be
the deciding factor when installing this product and using common sense plays an important
role as well. Pay attention to all safety warnings and any other special notes highlighted in
the manual. Improper installation of the equipment or failure to follow safety warnings could
result in serious injury, death, or property damage.
These instructions are primarily intended to assist qualified individuals experienced in the
proper installation of this appliance. Some local codes require licensed installation/service
personnel for this type of equipment. Please read all instructions carefully before starting the
installation. Return these instructions to the customer’s package for future reference.
INSTALLATION INSTRUCTIONS
2
Important Safety Information ....................................3
Requirements & Codes ..............................................4
General Information ...................................................4
Before You Install this Unit .........................................4
Locating the Heat pump ...........................................4
Minimum Clearances ................................................5
Service Access Clearance ....................................5
Clearances to Combustibles .................................5
Air Duct System ........................................................5
Unconditioned Spaces ...........................................5
Heat Pump Installation ...............................................5
Unpacking the Unit ...................................................5
Installing Return & Supply Air Collars .......................5
Supply Duct ...........................................................6
Return Duct ...........................................................6
Connecting Return & Supply Air
Flexible Ducts ............................................................6
Locating & Installing the Return Air
Assembly ...................................................................6
Locating & Installing the Supply
Dampers ....................................................................7
Condensate Drainage ...............................................7
Electrical Connections ...............................................7
Pre - Electrical Checklist ...........................................7
Line Voltage ...............................................................7
Overcurrent Protection ..............................................8
Grounding..................................................................8
Thermostat Connections ...........................................8
Unbalanced 3-Phase Supply Voltage ........................8
Defrost Cycle Control ................................................8
Defrost Control Board................................................9
Operational Information..........................................9
Normal Mode .........................................................9
Speed Up Mode (Testing Procedure) ................... 10
Startup & Adjustments ............................................10
Pre - Start Checklist ................................................10
Start - Up Procedure ...............................................10
Air Circulation ....................................................... 10
System Heating .................................................... 10
System Cooling ....................................................10
Short Cycle Protection .........................................10
Emergency Heat ..................................................10
Anti Short Cycle Timer Test .....................................10
Heating Mode ....................................................... 10
Cooling Mode .......................................................10
Adjustment of Refrigerant Charge ........................... 11
Charging the Unit in AC Mode with Outdoor
Temperatures above 65° F ......................................11
Charging the Unit in Heat Mode ..............................11
Unit Maintenance ...................................................... 11
Figures & Tables ....................................................... 12
Figure 8 - Physical Data & Dimensions ................ 12
Charging Tables - Cooling Mode ............................. 13
Table 2 - 2 Ton Models (024K Series) .................. 13
Table 3 - 2.5 Ton Models (030K Series) ............... 13
Table 4 - 3 Ton Models (036K Series) .................. 13
Table 5 - 3.5 Ton Models (042K Series) ............... 14
Table 6 - 4 Ton Models (048K Series) .................. 14
Table 7 - 5 Ton Models (060K Series) .................. 14
Charging Tables - Heating Mode ............................. 15
Table 8 - 2 Ton Models (024K Series) .................. 15
Table 9 - 2.5 Ton Models (030K Series) ............... 15
Table 10 - 3 Ton Models (036K Series) ................ 16
Table 11 - 3.5 Ton Models (042K Series) ............. 16
Table 12 - 4 Ton Models (048K Series) ................ 17
Table 13 - 5 Ton Models (060K Series) ................ 17
Electrical Diagrams ................................................. 18
Figure 10 - Single Phase Models ......................... 18
Figure 11 - 3 -Phase Models ................................ 19
Installation / Performance Checklist ....................... 20
TABLE OF CONTENTS
3
IMPORTANT SAFETY INFORMATION
Please read all instructions before servicing this equipment.
Pay attention to all safety warnings and any other special
notes highlighted in the manual. Safety markings are
used frequently throughout this manual to designate a
degree or level of seriousness and should not be ignored.
WARNING indicates a potentially hazardous situation that
if not avoided, could result in personal injury or death.
CAUTION indicates a potentially hazardous situation that
if not avoided, may result in minor or moderate injury or
property damage.
WARNING:
ELECTRICAL SHOCK, FIRE OR EXPLOSION
HAZARD
Failure to follow safety warnings exactly could
result in serious injury or property damage.
Improper servicing could result in dangerous
operation, serious injury, death or property
damage.
• Before servicing, disconnect all electrical
power to the indoor blower.
• Whenservicingcontrols,labelallwiresprior
to disconnecting. Reconnect wires correctly.
• Verifyproperoperationafterservicing.
WARNING:
These single package units leave the factory with
a nitrogen holding charge. Follow all charging
instructions for maximum unit performance and
efficiency. Some local codes require licensed
installation/service personnel to service this
type of equipment. Refrigerant charging must
be done by qualified personnel familiar with safe
and environmentally responsible refrigerant
handling procedures. Under no circumstances
should the owner attempt to install and/or
service this equipment. Failure to comply with
this warning could result in property damage,
personal injury, or death.
CAUTION:
This unit uses R-22 refrigerant. DO NOT use
any other refrigerant in this unit. Use of another
refrigerant will damage the unit.
WARNING:
Disturbing the insulation of this product during
installation, maintenance, or repair will expose
you to fiberglass wool.
• Breathingthismaterialmaycauserespiratory
irritations or may cause lung cancer.
• Fiberglass wool may also cause eye
irritation, skin sensitization, or other allergic
responses in susceptible individuals.
• Always wear goggles, disposable gloves,
long sleeved shirt, and appropriate breathing
protection when working near this insulation.
If contact with skin occurs, wash immediately
with soap and water. In case of contact with
eyes, flush immediately with water for at least
15 minutes. Contact a physician if needed.
WARNING:
The information listed below and on the next
page must be followed during the installation,
service, and operation of this unit. Unqualified
individuals should not attempt to interpret these
instructions or install this equipment. Failure
to follow safety recommendations could result
in possible damage to the equipment, serious
personal injury or death.
• Before beginningthe installation, verifythat the unit
model is correct for the job. The unit model number is
printed on the data label.
• Theinstallershouldbecomefamiliarwiththeunitswiring
diagram before making any electrical connections to
the unit. See the unit wiring label or Figures 10 & 11
(pages 18 & 19).
• Follow allprecautions in the literature, ontags, and
on labels provided with the equipment. Read and
thoroughly understand the instructions provided with
the equipment prior to performing the installation and
operational checkout of the equipment.
• Usecautionwhenhandlingthisapplianceorremoving
components. Personal injury can occur from sharp metal
edges present in all sheet metal constructed equipment.
4
Locating the Heat Pump
• Surveythejobsitetodeterminethebestlocationfor
mounting the outdoor unit. Select a solid, level position,
preferably on a concrete slab, slightly above the grade
level, and parallel to the home. If possible, select a site
for the unit that is as close as possible to the proposed
return grille location. DO NOT PLACE UNIT UNDER
THE HOME.
• The unit should be located with consideration of
minimizing the length of the supply and return ducts
with no sharp radius bends. If practical, place the heat
pump and its ducts in an area where they will be shaded
from the afternoon sun, when the heat load is greatest.
• Consideration shouldalso be givento availability of
electric power, service access, noise, and shade.
• Overhead obstructions, poorly ventilated areas, and
areas subject to accumulation of debris should be
avoided. The hot condenser air must be discharged
up and away from the home, and if possible, in a
direction with the prevailing wind. Do not place the unit
in a confined space. See Figure 9 (page 12) for unit
dimensions.
• Sufcientclearanceforunobstructedairowthroughthe
outdoor coil must be maintained in order to achieve rated
performance. For minimum clearances to obstructions,
see Figure 1.
REQUIREMENTS & CODES
• Allelectricalwiringmustbecompletedinaccordance
with local, state & national codes and regulations. 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 for special installation
requirements.
• AirDuctsmustbeinstalledinaccordancewithlocal,
state & national codes and regulations and these
instructions.
• ConsultTable1(page9),andtheratingplateforthe
propercirculating air owandtemperature rise. Itis
important that the duct system be designed to provide
thecorrectowratesandexternalpressurerise.An
improperly designed duct system can result in nuisance
shutdowns, and comfort or noise issues.
• Thisunitisdesignedforoutdoorinstallationsonlyand
should be positioned as described in Locating the Heat
Pump.
Figure 1. Minimum Unit Clearances
12"
12"
24"
TOP OF UNIT
TO BE
UNOBSTRUCTED
0"
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 specified may
invalidate AHRI Certification, 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 fins are straight. If necessary, comb fins to remove
attenedorbentns.Claimsfordamageshouldbe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.
5
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 five minutes between
runs.
1. Remove the bands from around the unit.
2.Unfoldthetopandbottomcap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 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 1.
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 & return air ducts ............................................ 0”
Duct connection side .................................................. 0”
Air Duct System
Air ducts should be installed in accordance with these
instructions, and all applicable codes.
• Thesupplyductsystem(Figure3,page6),including
the number and type of registers, will have much more
effect on the performance of the system than any other
factor. The duct must be sufficiently large to conduct
an adequate amount of air to each register.
• Ductworkshouldbeattacheddirectlytotheunitanges
for horizontal applications.
• Forhighlyresistiveductsystemsitmaybenecessary
to add an additional return air duct and or supply to
achieve maximum performance and prevent coil icing
andrefrigerantoodback.
• Theheatpumpsystemwillnotcoolorheatthehomeif
air is lost to the outside through leaks in the duct system.
Ducts that are collapsed or restricted by foreign objects
willalsopreventadequateairow.
• 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.
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.
Installing Return & Supply Air Collars
The supply and return collars are shipped with the unit and
are located in the supply duct. The diameter of the return
duct collar for 2, 2.5, & 3 ton models is 12”. The 3.5, 4, &
5 ton models are designed with 14” returns. The collars
can be easily positioned over the unit openings (Figure
2) and secured with sheet metal screws. The diameter of
the supply duct collar is 12”.
NOTE: Before permanently installing the collars, it is
recommended you pre-fit them over the openings first to
determine best fit and alignment.
Figure 2. Return & Supply Air Collars
Transition
Duct Screws
Supply Air
Return Air
Duct
Dimples
6
Figure 3. Typical Duct Applications
MULTIPLE DUCT APPLICATIONSINGLE DUCT APPLICATION
Supply Duct
1. Assemble the collar by overlapping the two ends.
NOTE: One end of the collar is slotted and the opposite
end has two small holes. Position the end with small
screw holes underneath the slotted end.
2. Fasten the collar ends with two self drilling sheet metal
screws.
3. Position the collar over the opening and align the 4 holes
in the collar with the 4 holes (or dimples depending on
model) in the rear panel.
4. Using self-drilling screws (10-16x.5), secure the collar
to the rear panel.
Return Duct
The 12” return duct is installed in the same manner as
the supply duct. If the duct has a 14” return, follow these
instructions
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. On some models a 14” duct collar is
provided for the return duct.
Connecting Return & Supply Air Flexible Ducts
• Flexibleductsmaybecuttotherequiredlengthand
spliced with sheet metal sleeves and clamps. Keep all
ducts as short and straight as possible. Avoid sharp
bends. Please follow all instructions packed with duct.
• Flexible ducts can be secured to the corresponding
collars with the provided clamps. After the inner
duct is connected to the collar, pull the insulation
and plastic sleeve over the connection and clamp.
NOTE: To prevent a loss in cooling capacity, make
sure all connections are tight.
• Homes with multiple supply ducts (or special
applications), a Y fitting is available for dividing the
supply air to different areas of the home for more
efficient cooling. NOTE: For maximum performance,
insulate the Y fitting.
Locating & Installing the Return Air Assembly
To simplify installation, locate and install the return air
assembly first. If desired, the return opening can be located
inside a closet with louvered doors that has an open area
equal to or greater than a 12” x 20” grille. The return air
grille can be placed in the wall of a closet and the ducted
into the filter box through a boxed-in area at the closet
oorlevel.Make sure the filter is readily accessible.
NOTE: The return air box with grille and filter (Figure 4,
page 7) should not be located in heavy traffic areas like
hallways or center of rooms. A good spot is in a corner or
under a table, if a minimum two inch clearance is available.
1. Start the installation from under the home by cutting a
smallholeinthesub-oor.Determinehowthe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oorsothat
theboxwilltbetweenthe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 fiberboard directly under the hole in
theoor.However,ifthe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. Install the filter and return air grille in place.
7
Figure 5. Supply Damper
AUTOMATIC DAMPER IS CLOSED
WHEN HEAT PUMP IS OFF
Figure 4. Return Air Box
Locating & Installing the Supply Damper(s)
When locating the supply damper(s), carefully check
oorjoistsandframemembersthatcouldinterferewith
theinstallationofthedamperorexibleduct.Ideally,the
damper (Figure 5) should be located in the bottom of the
main duct, forward of center of the home, at least three
feet from the nearest register. The round supply opening
in the slanted side of the damper should face the side of
the home where the heat pump is located.
1. Locate the center of the heat duct by cutting a small hole
in the fiberboard below the duct at the desired location.
2. Cut a hole approximately 3/4” larger than the damper
opening in the fiberboard.
3. Cut a 9-1/8” x 13-1/8” hole in the duct and bend over
alltabsatontheinsideoftheheatduct.
4. Insert the damper into the duct and bend over all tabs
atontheinsideoftheheatduct.
5. Seal the opening between the fiberboard and damper
orexibleduct.
Figure 6. Drain Trap
Elbow
P-Trap
1. Thread the elbow provided with the unit into the drain
connection until hand tight.
2. Connect the condensate tubing onto the fitting, forming
a trap (Figure 6) near the drain connection.
3. Route the condensate tube from the trap to a suitable
drain. NOTE: For proper drainage, make sure the trap
is level to the ground and tubing outlet is below trap
level.
Condensate Drainage
A 3/4” condensate fitting extends out of the side of the
unit as shown in Figure 6. The drain trap, shipped in the
electrical compartment, must be installed to prevent water
from collecting inside the unit.
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.
Pre-Electrical Checklist
√ Verify that the voltage, frequency, and phase of the
supply source match the specifications on the unit rating
plate.
√ Verify that the service provided by the utility is sufficient
to handle the additional load imposed by this equipment.
Refer to the unit wiring label for proper high and low
voltage wiring.
√ Verify factory wiring is in accordance with the unit wiring
diagram (Figures 10 & 11, pages 18 & 19). Inspect for
loose connections.
LineVoltage
• Electricalconnectionsmustbeincompliancewithall
applicable local codes and ordinances.
• 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 field wiring. Any
other wiring methods must be acceptable to authority
having jurisdiction.
8
• 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 as shown in Figure 7 (page
9). Connect L1 & L2 directly to the contactor. For 3
phase systems, connect L3 to the contactor.
• Useonlycopperwireforthelinevoltagepowersupply
to this unit as listed in Table 1. 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.
• Seetheunitwiringlabelforproperhighandlowvoltage
wiring. Make all electrical connections in accordance
with all applicable codes and ordinances. See Figures
10 & 11 (pages 18 & 19).
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.
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. Use the green grounding lug provided in the
control box for grounding the unit.
Thermostat Connections
• Theheatpumpthermostatisequippedwithasystem
HEAT-COOL switch, which provides a positive means
of preventing simultaneous operation of the heating and
cooling units. The thermostat is also equipped with an
ON-AUTO fan switch which allows the home owner to
operate the indoor blower when air circulation is desired.
• Connect the low voltage wires to the respective
terminals on the thermostat base (Figure 8, page 9).
See thermostat instruction sheet for more detailed wiring
information.
• Thethermostatshouldbemountedabout5feetabove
the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
Example
:
AB = 226V
BC = 230V
AC = 227V
2. Determine the average voltage in the power supply.
3. Determine the maximum deviation:
4. Determine percent of
voltage imbalance by
using the results from
steps 2 & 3 in the following
equation.
maxvoltage deviation
fromaverage voltage
=100 x
averagevoltage
% Voltage Imbalance
2
228
100
x
= 0.88%
Example:
1. Measure t he line voltages
of your 3 phase power
supply where it enters the
building and at a location
that will only be dedicated
to the unit installation (at
the units circuit protection
or disconnect).
Unbalanced3-PhaseSupplyVoltage
Voltage unbalance occurs when the voltages of all phases
of a 3-phase power supply are no longer equal. This
unbalance reduces motor efficiency and performance.
Some underlying causes of voltage unbalance may include:
Lack of symmetry in transmission lines, large single-phase
loads, and unbalanced or overloaded transformers. A
motor should never be operated when a phase imbalance
in supply is greater than 2%.
Perform the following steps to determine the percentage
of voltage imbalance:
In this example, the measured line voltages were
226, 230, and 227. The average would be 228 volts
(226 + 230 + 227 = 683 / 3 = 228).
The amount of phase imbalance (0.88%) is satisfactory
since the amount is lower than the maximum allowable
2%. Please contact your local electric utility company if
your voltage imbalance is more than 2%.
Example:
From the values given in step 1, the BC voltage
(230V) is the greatest difference in value from
the average:
230 - 228 = 2
228 - 226 = 2
228 - 227 = 1
Highest Value
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.
9
Figure 7. Power Entry
LowVoltage
HighVoltage
Defrost Cycle Control
The defrost cycle is initiated via a signal from the defrost
sensor on the outdoor coil to the defrost control board inside
the control panel. This indicates the coil temperature is low
enough to start accumulating frost. The board has interval
settings of 30, 60, and 90 minutes. These time intervals
represent the time elapsed before defrosting cycle starts
and they are dependent on the climate conditions of the
installation. A 30 minute setting would be recommended
in a moist climate such as Seattle Washington. A 90
minute setting would be adequate in a dry climate such
as southern Arizona. The factory time interval setting is
30 minutes.
Figure8.LowVoltageConnections
Table 1. Airflow Data
Model
Number
Q3RX-
External Static Pressure (in.w.c.)
0.1 0.2 0.3 0.4 0.5 0.6
024 1160 1150 1120 1060 980 880
036 1550 1510 1430 1350 1240 1100
042 1620 1590 1550 1500 1450 1380
048 1770 1730 1690 1640 1570 1490
060 1850 1790 1720 1650 1580 1500
Defrost Control Board
Operational Information
• Terminals R - C must have 24V present between
them for the time delay and defrost sequences to be
operational.
• Defrost Thermostat (DFT) By-Pass - Jumping the
T2 & DFT test pins will communicate to the board that
the defrost thermostat is closed (if the compressor is
running). The defrost T-stat tells the board whether a
defrost cycle needs to be started or terminated.
NOTE: The defrost T-stat is closed at 30° F or below
and is open at 68° F or above, but its state is unknown
if the temperature is between 30° F and 68° F.
• With the DFT closed, the unit will run for 30/60/90
minutes in heat mode and then defrost the outdoor
coil. The defrost will turn off the outdoor fan, energize
the reversing valve, and turn on the compressor raising
the coil temperature to 68° F. This will open the DFT
and terminate the defrost. If the DFT does not open,
the defrost will end after 10 minutes.
• Defrost Board Speed Up - Jumping the TEST terminal
to the C (common) terminal (while the compressor is in
heat mode) will over-ride the defrost board and initiate a
faster defrost test in 5, 10 or 15 seconds as determined
by the 30, 60 or 90 minute defrost pin settings (factory
setting is 30 minutes).
– The compressor off delay is also bypassed when the
unit goes into defrost test. If unit is kept in defrost
test, the delay will be bypassed when the test is
terminated by the processor.
NOTE: If the jumper is removed before the test is over,
the processor will perform the remainder of a normal
defrost as noted above.
• The delay/no-delay pin affects compressor operation
during defrosts. The default setting is delay. To switch
from delay to no-delay, remove the pin from the delay
pin location and move it to the no-delay pin location.
- Scroll compressors that have noise issues while
going into or coming out of defrost should use this
30 second delay to reduce the defrost noise.
Normal Mode
To test normal defrost operation when the temperature is
above 35° F, jumper R to DFT on the board and allow the
unit to run for 30 minutes. Defrost will continue until the
R to DFT jumper is removed or for 10 minutes. Remove
the jumper.
The 5 minute time delay feature can be shortened 1 time
to 1 second by jumping the Test to C terminal. Remove
the jumper and repeat as desired. NOTE: If jumper is left
on the Test to common pins permanently, the defrost
cycle will be inoperable.
10
8. Set the temperature mode above room temperature.
The unit should stop.
9. Instruct the homeowner on unit and thermostat operation
and filter servicing.
Air Circulation
Leave the thermostat system mode on OFF, and set the
fan mode to ON. Blower should run continuously. Check
the air delivery at the supply registers and adjust register
openings for balanced air distribution. Examine ducts for
leaks or obstruction if insufficient air is detected.
Set the thermostat fan mode to AUTO. The blower should
stop running.
System Heating
Set the thermostat system mode to HEAT and the fan mode
to AUTO. Change the thermostat temperature selector
above the existing room temperature and check for the
discharge of warm air at the supply registers.
System Cooling
Set the thermostat’s system mode to COOL and the
fan mode to AUTO. Change the thermostat temperature
selector below the existing room temperature. Allow the
cooling system to operate for several minutes and check
for the discharge of cool air at the supply registers.
Short Cycle Protection
The control circuit is equipped with a time-delay feature
for protection against short cycling. With the system
operating in the cooling mode, gradually raise the
thermostat temperature setting until the whole system de-
energizes. Immediately lower the thermostat temperature
to the original setting and verify that the indoor blower is
energized. After approximately 5 minutes the compressor
and the outdoor fan will energize.
Emergency Heat
(Available only when Electric heat is supplied) Set the
thermostat’s system mode to EM HT and the fan mode
to either AUTO (intermittent air) or to ON (continuous air).
Change the thermostat’s temperature selector above the
existing room temperature and check the following:
1. The thermostat auxiliary heat light (RED) should be on.
2. The heat pump compressor and the fan should not run;
low voltage circuit remains energized.
3. The blower will run according to the thermostat’s fan
mode setting.
Anti Short Cycle Timer Test
The 5 minute time delay feature can be bypassed by
shorting the TEST pins together.
Heating Mode
When the TEST pins are shorted together for more than
1 second, the control will switch between defrost mode
and heating mode.
Cooling Mode
When the TEST pins are shorted together for more than
1 second, the Anti Short Cycle Timer will be bypassed.
Speed Up Mode (Testing Procedure)
1. Jumper T2 to DFT at the test terminals.
2. With unit running in heat mode, jump the TEST terminal
to the C (common) terminal near it. The board will
speed up and enter defrost mode in 5/10/15 seconds,
depending on the defrost time selection. Compressor
delay will not function during speed-up. NOTE: Manually
initiating a defrost will cause the compressor to run
continually when entering defrost.
3. This test will end in 5 seconds if the TEST - common
short is not removed.
4. Remove both the short and the T2 to DFT jumper to
terminate the defrost cycle. The 30 second compressor
delay should operate normally.
5. Test is complete, reset thermostat to the equipment
owner’s preference.
STARTUP & ADJUSTMENTS
Pre-Start Checklist
The following check list should be observed prior to
starting the unit.
√ Is the unit level? Unit should be level or slightly slanted
toward the drain for proper condensate drainage.
√ Is the unit installed with the proper clearances as listed
onpages4&5?Istherefreeairowtoandfromthe
condeser?
√ 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.
11
Refrigerant Charging
WARNING:
These packaged units leave the factory with a
nitrogen holding charge. DO NOT operate any
unit while it contains a Nitrogen holding charge.
Doing so may damage the units compressor.
Follow these charging instructions for maximum
unit performance and efficiency. Some local
codes require licensed installation/service
personnel to service this type of equipment.
Refrigerant charging must be done by qualified
personnel familiar with safe and environmentally
responsible refrigerant handling procedures.
Under no circumstances should the owner
attempt to install and/or service this equipment.
Failure to comply with this warning could result
in property damage, personal injury, or death.
CAUTION:
This unit uses refrigerant R-22. DO NOT use
any other refrigerant in this unit. Use of another
refrigerant will damage the unit.
• The system refrigerant charge can be checked and
adjusted through the service ports provided at the front
panel. Use only gauge lines which have a Schrader
depression device present to actuate the valve. Draw a
vacuum on gauge lines to remove air before attaching
them to the service ports on the unit.
• Toachieveratedcapacityandefciency,thecompressor
must be exposed to refrigerant for at least 24 hours
prior to running and must be run for a minimum of 12
hours.
To properly charge these units:
1. Read all Installation Instructions first.
2. Purge the nitrogen holding charge.
3. Evacuate the unit to 350-500 microns.
4. Allow the unit to remain under vacuum for at least 30
min.
5. Weigh-In the proper amount of new (or reclaimed) R-22
refrigerant. Refer to Table 2-7 (pages 13 & 14) or the
units rating label to determine the correct amount of
charge.
• Therefrigerantchargecanbecheckedandadjusted
through the service ports provided external to the
outdoor unit. Use only gage line sets which have a
“Schrader” depression device present to actuate the
valve.
Charging the Unit in Heating Mode
1. Evacuate the refrigerant system.
2. Weigh in the proper charge as shown on the unit rating
plate. Use the charging charts for heating mode of
operation as a guide (Tables 8 - 13, pages 15 - 17).
Tablesreectconditionsathighspeedoperation.Unit
charge MUST be verified in cooling season.
3. Verify the unit is operating properly according to the
System Heating section on page 10.
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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
filter in the return air system. Replace disposable
filters with the same type and size.
• Donotattempttoaddadditionaloiltomotorsunequipped
with oil tubes. The compressor is hermetically sealed
at the factory and does not require lubrication.
12
FIGURES & TABLES
Model Number Length (L) Width (W) Height (H)
Q3RX-024 49 35 22.2
Q3RX-030 49 35 22.2
Q3RX-036 49 35 22.2
Q3RX-042 49 35 30.2
Q3RX-048 49 35 30.2
Q3RX-060 49 35 30.2
Back(Duct)View
Figure 9. Physical Data & Unit Dimensions
TopView
SideView
L
W
18.01
Electric Heater Power Supply
Power Supply
Low Voltage Supply
Control
Access
Panel
Blower Access Panel
H
17.86
15.36
10.10
3/4" NPT
Drain Connection
1"
12.13
1.38
3.2
3.2 5.29
9.15
9.08
17.50
12" diameter (0r 14")
Return Duct Opening
12" diameter
Supply Duct
Opening
13
2 TON MODELS
Suct.
PreSS.
OutDOOr teMPerAture (° F)
70 75 80 85 90 95 100 105
LIQ.
PRESS.
DIS
TEMP.
LIQ.
PRESS.
DIS
TEMP.
LIQ.
PRESS.
DIS
TEMP.
LIQ.
PRESS.
DIS
TEMP.
LIQ.
PRESS.
DIS
TEMP.
LIQ.
PRESS.
DIS
TEMP.
LIQ.
PRESS.
DIS
TEMP.
LIQ.
PRESS.
DIS
TEMP.
70 177 162
72
176 162
189 166
74 175 162
189 167
202 171
76
173 162
189 168
203 173
216 177
78 179 168
190 170
204 174
217 179
230 183
80 195 175
206 177
219 181
232 185
244 189
82 211 182
222 184
234 188
247 192
259 195
84 227 188
238 191
249 195
262 199
275 202
86 232 192 242 194
253 197
265 202
278 206
88 246 198 257 200
269 204
281 209
90 261 203 272 206
284 210
92 276 208 287 211
94 290 212
96
Table 2. Charging Table for Q3RX-024 Series (2 Ton Models)
2.5 TON MODELS
Suct.
PreSS.
OutDOOr teMPerAture (° F)
70 75 80 85 90 95 100 105
LIQ.
PRESS.
DIS
TEMP.
LIQ.
PRESS.
DIS
TEMP.
LIQ.
PRESS.
DIS
TEMP.
LIQ.
PRESS.
DIS
TEMP.
LIQ.
PRESS.
DIS
TEMP.
LIQ.
PRESS.
DIS
TEMP.
LIQ.
PRESS.
DIS
TEMP.
LIQ.
PRESS.
DIS
TEMP.
72 205 163
74
204 163
216 163
76 203 163
216 164
229 164
78
195 158
216 165
229 166
242 167
80 201 163
212 163
230 167
243 169
256 169
82 218 168
230 168
245 171
258 172
271 172
84 235 173
247 173
260 174
273 175
286 176
86 252 177
264 177
276 178
289 179
302 180
88 256 181 268 181
280 181
292 182
305 183
90 272 184 284 184
296 184
309 187
92 288 187 299 186
311 187
94 303 188 314 188
96 317 190
98
Table 3. Charging Table for Q3RX-030 Series (2.5 Ton Models)
REFRIGERANT CHARGING TABLES - COOLING MODE
Shadedboxesindicateoodedconditions.
Rated design values. The suction pressure will be lower than design value if indoor air ow,enteringdrybulb,orenteringwetbulb
temperature are lower than design.
1. All pressures are listed psig and all temperatures in °F
2. Discharge temperatures greater than charted values indicate an undercharged system.
3 TON MODELS
Suct.
PreSS.
OutDOOr teMPerAture (° F)
70 75 80 85 90 95 100 105
LIQ.
PRESS.
DIS
TEMP.
LIQ.
PRESS.
DIS
TEMP.
LIQ.
PRESS.
DIS
TEMP.
LIQ.
PRESS.
DIS
TEMP.
LIQ.
PRESS.
DIS
TEMP.
LIQ.
PRESS.
DIS
TEMP.
LIQ.
PRESS.
DIS
TEMP.
LIQ.
PRESS.
DIS
TEMP.
70 213 168
72
212 168
225 169
74 211 168
225 170
239 172
76
208 167
225 171
239 173
253 174
78 214 173
225 172
240 175
254 176
268 178
80 231 177
242 177
256 178
270 180
283 181
82 247 182
259 181
271 182
285 184
298 185
84 264 185
275 186
288 187
301 188
314 189
86 268 189 280 189
292 189
304 191
317 192
88 284 192 295 192
308 193
321 196
90 299 195 311 195
323 196
92 314 197 326 198
94 329 199
96
Table 4. Charging Table for Q3RX-036 Series (3 Ton Models)
14
3.5 TON MODELS
SUCT.
PRESS.
OutDOOr teMPerAture (° F)
70 75 80 85 90 95 100 105
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
70 208 170
72
207 171
219 171
74 206 171
219 171
231 172
76
198 166
219 172
232 173
244 174
78 204 171
215 171
232 175
246 176
258 176
80 221 176
232 176
247 178
260 179
273 179
82 238 180
249 180
262 181
276 182
288 183
84 254 184
266 184
278 185
291 186
304 186
86 259 188 270 188
282 188
294 189
307 190
88 275 191 286 190
298 191
310 193
90 290 193 301 193
313 193
92 305 195 316 194
94 319 196
96
Table 5 Charging Table for Q3RX-042 Series (3.5 Ton Models)
REFRIGERANT CHARGING TABLES - COOLING MODE
Shadedboxesindicateoodedconditions.
Rated design values. The suction pressure will be lower than design value if indoor air ow,enteringdrybulb,orenteringwetbulb
temperature are lower than design.
1. All pressures are listed psig and all temperatures in °F
2. Discharge temperatures greater than charted values indicate an undercharged system.
4 TON MODELS
Suct.
PreSS.
OutDOOr teMPerAture (° F)
70 75 80 85 90 95 100 105
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
65 187 154
67
186 154
199 156
69 185 154
199 157
212 159
71
176 149
198 158
213 161
226 163
73 182 154
195 156
213 162
228 165
241 168
75 200 161
213 163
229 167
243 170
257 173
77 218 168
231 170
245 173
259 176
273 178
79 236 174
249 176
262 178
276 181
290 184
81 241 178 253 179
266 181
279 184
293 187
83 257 182 270 184
283 186
296 1914
85 274 187 286 188
299 191
87 290 190 302 192
89 305 193
91
Table 6. Charging Table for Q3RX-048 Series (4 Ton Models)
5 TON MODELS
SUC.
PRESS.
OutDOOr teMPerAture (° F )
70 75 80 85 90 95 100 105
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
LIQ.
PRESS.
DIS.
TEMP.
62 198 166
64
197 166
211 167
66 196 166
211 168
226 170
68
187 160
211 169
226 171
241 173
70 193 166
207 167
227 173
242 175
257 177
72 212 172
226 174
244 177
259 179
274 181
74 232 178
246 179
261 182
277 184
292 186
76 250 183
265 185
279 187
295 189
310 191
78 255 187 269 188
283 190
298 193
313 195
80 273 192 287 193
301 194
316 198
82 291 195 305 196
319 198
84 308 198 322 199
86 325 201
88
Table 7. Charging Table for Q3RX-060 Series (5 Ton Models)
15
2.5 TON MODELS
OUTDOOR TEMPERATURE (° F)
0 10 20 30 40 50 60
Suc.
Press
Liq.
Press.
Dis.
Temp.
Suc.
Press.
Liq.
Press.
Dis.
Temp.
Suc.
Press.
Liq.
Press.
Dis.
Temp.
Suc.
Press.
Liq.
Press.
Dis.
Temp.
Suc.
Press.
Liq.
Press.
Dis.
Temp.
Suc.
Press.
Liq.
Press.
Dis.
Temp.
Suc.
Press.
Liq.
Press.
Dis.
Temp.
15 114 126 23 130 138 30 146 150 38 162 161 46 165 175 53 177 191 61 189 206
16 121 124 24 136 136 31 151 148 39 166 159 47 172 172 54 184 186 62 196 200
17
128 122
25
142 134
32
156 146
40
170 157
48
179 169
55
191 182
63
203 194
18 135 120 26 148 132 33 161 144 41 173 155 49 186 166 56 198 177 64 210 188
19
142 118
27
154 1330
34
165 142
42
177 153
50
193 164
57
205 173
65
217 181
20 149 116 28 160 128 35 170 140 43 181 151 51 200 161 58 212 168 66 224 175
21 156 114 29 166 126 36 175 138 44 184 149 52 207 158 59 219 164 67 231 169
Table 9. Charging Table for Q3RX-030 Series (2.5 Ton Models)
2 TON MODELS
OUTDOOR TEMPERATURE (° F)
0 10 20 30 40 50 60
Suc.
Press
Liq.
Press.
Dis.
Temp.
Suc.
Press.
Liq.
Press.
Dis.
Temp.
Suc.
Press.
Liq.
Press.
Dis.
Temp.
Suc.
Press.
Liq.
Press.
Dis.
Temp.
Suc.
Press.
Liq.
Press.
Dis.
Temp.
Suc.
Press.
Liq.
Press.
Dis.
Temp.
Suc.
Press.
Liq.
Press.
Dis.
Temp.
17 117 131 25 132 142 32 147 153 40 162 164 48 164 177 56 176 192 64 188 208
18 124 129 26 138 140 33 152 151 41 166 162 49 171 174 57 183 188 65 195 201
19
131 127
27
144 138
34
157 149
42
170 160
50
178 171
58
190 183
66
202 195
20 138 125 28 150 136 35 162 147 43 173 158 51 185 169 59 197 179 67 209 189
21
145 123
29
156 134
36
167 145
44
177 156
52
192 166
60
204 174
68
216 183
22 152 121 30 162 132 37 171 143 45 181 154 53 199 163 61 211 170 69 223 177
23 159 119 31 168 130 38 176 141 46 184 152 54 206 160 62 218 165 70 230 171
Table 8. Charging Table for Q3RX-024 Series (2 Ton Models)
REFRIGERANT CHARGING TABLES - HEATING MODE
Shadedboxesindicateoodedconditions.
Rateddesignvalues.Suctionpressurewillvaryfromdesignvalueifoutdoorairow,enteringdrybulb,orenteringwetbulbtemperaturesvary.
1. All pressures are listed psig and all temperatures in °F
2. Discharge temperatures greater than charted values indicate an undercharged system.
16
REFRIGERANT CHARGING TABLES - HEATING MODE
Shadedboxesindicateoodedconditions.
Rateddesignvalues.Suctionpressurewillvaryfromdesignvalueifoutdoorairow,enteringdrybulb,orenteringwetbulbtemperaturesvary.
1. All pressures are listed psig and all temperatures in °F
2. Discharge temperatures greater than charted values indicate an undercharged system.
3 TON MODELS
OUTDOOR TEMPERATURE (° F)
0 10 20 30 40 50 60
Suc.
Press
Liq.
Press.
Dis.
Temp.
Suc.
Press.
Liq.
Press.
Dis.
Temp.
Suc.
Press.
Liq.
Press.
Dis.
Temp.
Suc.
Press.
Liq.
Press.
Dis.
Temp.
Suc.
Press.
Liq.
Press.
Dis.
Temp.
Suc.
Press.
Liq.
Press.
Dis.
Temp.
Suc.
Press.
Liq.
Press.
Dis.
Temp.
18 118 149 23 130 148 28 142 148 32 154 148 41 158 160 54 179 183 66 199 207
19 125 147 24 136 146 29 146 146 33 157 146 42 165 157 55 186 179 67 206 201
20
132 145
25
142 144
30
151 144
34
161 144
43
172 154
56
193 174
68
213 195
21 139 143 26 147 142 31 156 142 35 165 142 44 179 151 57 200 170 69 220 188
22
146 141
27
153 140
32
161 140
36
168 140
45
186 148
58
207 165
70
227 182
23 153 139 28 159 138 33 166 138 37 172 138 46 193 145 59 214 161 71 234 176
24 160 137 29 165 136 34 170 136 38 176 136 47 200 143 60 221 156 72 241 170
Table 10. Charging Table for Q3RX-036 Series (3 Ton Models)
Table 11. Charging Table for Q3RX-042 Series (3.5 Ton Models)
3.5 TON MODELS
56OUTDOOR TEMPERATURE (°. F)57
0 10 20 30 40 50 60
Suc.
Press
Liq.
Press.
Dis.
Temp.
Suc.
Press.
Liq.
Press.
Dis.
Temp.
Suc.
Press.
Liq.
Press.
Dis.
Temp.
Suc.
Press.
Liq.
Press.
Dis.
Temp.
Suc.
Press.
Liq.
Press.
Dis.
Temp.
Suc.
Press.
Liq.
Press.
Dis.
Temp.
Suc.
Press.
Liq.
Press.
Dis.
Temp.
12 118 142 20 132 144 27 147 146 35 161 149 43 165 167 53 183 200 63 200 234
13 125 140 21 138 142 28 151 144 36 165 147 44 172 164 54 190 196 64 207 227
14
132 138
22
144 140
29
156 142
37
169 145
45
179 161
55
197 191
65
214 221
15 139 136 23 150 138 30 161 140 38 172 143 46 186 158 56 204 187 66 221 215
16
146 134
24
156 136
31
166 138
39
176 141
47
193 155
57
211 182
67
228 209
17 153 132 25 162 134 32 171 136 40 180 139 48 200 153 58 218 178 68 235 203
18 160 130 26 168 132 33 175 134 41 183 137 49 207 150 59 225 173 69 242 197
17
REFRIGERANT CHARGING TABLES - HEATING MODE
Shadedboxesindicateoodedconditions.
Rateddesignvalues.Suctionpressurewillvaryfromdesignvalueifoutdoorairow,enteringdrybulb,orenteringwetbulbtemperaturesvary.
1. All pressures are listed psig and all temperatures in °F
2. Discharge temperatures greater than charted values indicate an undercharged system.
4 TON MODELS
OUTDOOR TEMPERATURE (° F)
0 10 20 30 40 50 60
Suc.
Press
Liq.
Press.
Dis.
Temp.
Suc.
Press.
Liq.
Press.
Dis.
Temp.
Suc.
Press.
Liq.
Press.
Dis.
Temp.
Suc.
Press.
Liq.
Press.
Dis.
Temp.
Suc.
Press.
Liq.
Press.
Dis.
Temp.
Suc.
Press.
Liq.
Press.
Dis.
Temp.
Suc.
Press.
Liq.
Press.
Dis.
Temp.
10 125 142 18 141 147 25 157 152 33 173 157 42 176 168 51 189 183 60 203 198
11 132 140 19 147 145 26 162 150 34 177 155 43 183 165 52 196 178 61 210 192
12
139 138
20
153 143
27
167 148
35
181 153
44
190 162
53
203 174
62
217 186
13 146 136 21 159 141 28 172 146 36 184 151 45 197 159 54 210 169 63 224 179
14
153 134
22
165 139
29
176 144
37
188 149
46
204 156
55
217 165
64
231 173
15 160 132 23 171 137 30 181 142 38 192 147 47 211 153 56 224 160 65 238 167
16 167 130 24 177 135 31 186 140 39 195 145 48 218 151 57 231 156 66 245 161
Table 12. Charging Table for Q3RX-048 Series (4 Ton Models)
Table 13. Charging Table for Q3RX-060 Series (5 Ton Models)
5 TON MODELS
OUTDOOR TEMPERATURE (° F)
0 10 20 30 40 50 60
Suc.
Press
Liq.
Press.
Dis.
Temp.
Suc.
Press.
Liq.
Press.
Dis.
Temp.
Suc.
Press.
Liq.
Press.
Dis.
Temp.
Suc.
Press.
Liq.
Press.
Dis.
Temp.
Suc.
Press.
Liq.
Press.
Dis.
Temp.
Suc.
Press.
Liq.
Press.
Dis.
Temp.
Suc.
Press.
Liq.
Press.
Dis.
Temp.
15 139 116 19 150 133 23 162 151 27 173 169 36 181 180 50 207 185 64 233 190
16 146 114 20 156 131 24 167 149 28 177 167 37 188 178 51 214 181 65 240 184
17
153 112
21
162 129
25
171 147
29
181 165
38
195 175
52
221 176
66
247 178
18 160 110 22 168 127 26 176 145 30 184 163 39 202 172 53 228 172 67 254 172
19
167 108
23
174 125
27
181 143
31
188 161
40
209 169
54
235 167
68
261 166
20 174 106 24 180 123 28 186 141 32 192 159 41 216 166 55 242 163 69 268 160
21 181 104 25 186 121 29 191 139 33 195 157 42 223 163 56 249 158 70 275 153
18
ELECTRICAL DIAGRAMS
Figure 10. Q3RX Wiring Diagram for Single Phase Series (2, 2.5, & 3 Ton Units)
OUTDOOR FAN
MOTOR
4
3
2
1
8
7
6
5
9
4
3
2
1
8
7
6
5
9
TO “G” ON
T- STAT
3 AMP
FUSE
BLOWER
RELAY
BLOWER
MOTOR
CAPACITOR
REVERSING
VALV E
COIL
DEFROST
SENSOR
DUAL
CAPACITOR
COMPRESSOR
TRANSFORMER
240V
24V
COM
REFER WIRE INTO
ELEC.BOX ON UNIT
TIE EXTRA MATERIAL
UP SO IT IS OUT OF THE
WAY
REF; 631849 AMP
ADAPTER
Y
C
OW2RE
DEFROST
CONTROL
BOARD
DFTERW2 OYC
T2
T1
DF1
DF2
BLUE
ORANGE
RED
YELLOW
BLACK
H
C
F
C
R
S
S
R
C
T1
T2
L2
L1
BLACK
BLACK
OUTDOOR THERMOSTAT
(ON SELECT MODELS
BROWN JUMPER
IS INSTALLED)
BLACK
RED
RED
NO
NC
COM
GROUND TO
COMPRESSOR
IF SUPPLIED
RED
BROWN
BROWN
(SEE NOTE 5)
BLUE
BLUE
BROWN
RED
RED
RED
RED
RED
ORANGE
YELLOW
WHITE
WHITE
WHITE
WHITE
GREY
GREY
BROWN
BLACK
BLACK
BLACK
GREEN
LOW PRESSURE
SWITCH
(SELECT MODELS ONLY.)
CRANKCASE HEATER
208/230 VOLTSMALL PACKAGE HEAT PUMP 50HZ/SINGLE PHASE
WIRING DIAGRAM
NOTES:
1. Disconnect all power before servicing.
2. For supply connections use copper conductors only.
3. Not sutiable on systems that exceed 150V to ground.
4. For replacement wires use conductors suitable for 105°C.
5. On models w/no pressure switch Yellow wire connects
“Y” & “T1” on Defrost Board.
7. Couper le courant avant de faire letretine.
8. Employez uniquement des conducteurs
en cuiver.
9. Ne convient pas aux installations de plus
de 150V a la terre.
710339D
(Replaces 710339C)
06/11
FIELD WIRING
LEGEND:
LOW VOLTAGE
HIGH VOLTAGE
19
Figure 11. Q3RX Wiring Diagram for 3-Phase Series (3, 3.5, 4, & 5 Ton Units)
Orange
Reversing Valve
Solenoid
Brown
3 Amp
Fuse
Red
3 A
3A - 3 Amp Fuse
Yellow
WIRING DIAGRAM
Small Packaged Heat Pump 380/420 Volt Three Phase 50Hz
NNOTES:
1. Disconnect all power before servicing.
2. For supply connections use copper conductors only.
3. For replacement wires use conductors suitable for 105° C.
1. Couper le courant avant de faire letretien.
2. Employez uniquement des conducteurs en cuivre
¢710337#¤
710337A (Replaces 7103370)
INSTALLATION / PERFORMANCE CHECK LIST
REFRIGERATION SYSTEM
Was unit given 24 hr warm up
period for crankcase heaters
(if applicable)?
YES NO
Stage-1 Liquid Pressure (high side) _____________
Stage-1 Suction Pressure (low side) _____________
Has the owner’s information
been reviewed with the
customer?
YES NO
Has the Literature Package
been left with the unit?
YES NO
INSTALLATION ADDRESS:
CITY ________________ S TAT E _____________
UNIT MODEL # _____________________________
UNIT SERIAL # _____________________________
Unit Installed Minimum
clearances per page 4?
YES NO
INSTALLER NAME:
CITY ________________
S TAT E ___________
ELECTRICAL SYSTEM
Electrical connections tight? YES NO
Line voltage polarity correct? YES NO
Rated Voltage: ________________________ VOLTS
L1-L2 Volts: __________________________ VOLTS
Has the thermostat been
calibrated?
YES NO
Is the thermostat level? YES NO
Is the heat anticipator setting
correct?(If Applicable)
YES NO
707634F (Replaces 707634E)
INSTALLER:PLEASELEAVETHESE
INSTRUCTIONS WITH THE OWNER.
Specifications & illustrations subject to change without notice or incurring obligations (08/15).
O’Fallon, MO, © Nortek Global HVAC LLC 2015. All Rights Reserved.
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Intertherm Q3RX Installation guide

Intertherm
Brand
Intertherm
Model
Q3RX
Category
Heat pumps
Type
Installation guide
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