Page 1
P3RA SERIES
USER’s MANUAL & INSTALLATION INSTRUCTIONS
R-22 Single Package Air Conditioner
10 SEER
User, please read this information thoroughly and become familiar with the capabilities and
use of your appliance before attempting to operate or maintain this unit. Keep this literature
where you have easy access to it in the future. If a problem occurs, check the instructions and
follow recommendations given. If these suggestions don’t eliminate your problem, call your
servicing contractor.
The Installation Instructions are primarily intended to assist qualifi ed individuals experienced
in the proper installation of this appliance. Some local codes require licensed installation/
service personnel for this type of equipment. Please read all instructions carefully before
starting the installation.
DO NOT DESTROY. PLEASE READ CAREFULLY AND
KEEP IN A SAFE PLACE FOR FUTURE REFERENCE.
IMPORTANT
Page 2
USER INFORMATION
Important Safety Information ....................................3
Operating Instructions ...............................................3
Cooling Operation .....................................................3
Heating Operation .....................................................3
Turning the Air Conditioner Off ..................................3
Operating the Indoor Blower Continuously ................3
Air Conditioner Maintenance .....................................3
Troubleshooting ..........................................................3
INSTALLER INFORMATION
Important Safety Information ....................................4
General Information ...................................................5
Before You Install this Unit ........................................5
Locating the Air Conditioner .................................... 5
Minimum Clearance Requirements ......................... 5
Service Access Clearances .................................. 5
Clearances to Combustible Materials ...................5
Air Duct System .......................................................5
Air Conditioner Installation .......................................6
Unpacking the Unit .................................................. 6
Installing Return & Supply Collars ............................6
Supply Duct ...........................................................6
Return Duct ........................................................... 6
Connecting the Return & Supply Air Flexible
Ducts ........................................................................ 6
Locating & Installing the Return Air Assembly ..........6
Locating & Installing the Supply Dampers ................ 7
Condensate Drainage ..............................................8
Electrical Connections ............................................... 8
Pre - Electrical Checklist ........................................... 8
Line Voltage .............................................................. 8
Overcurrent Protection ............................................. 9
Grounding ................................................................. 9
Unbalanced 3-Phase Supply Voltage ........................9
Thermostat / Low Voltage Connections .................. 10
Cooling Thermostat .............................................. 10
Heat/Cool Thermostat .......................................... 10
Blower Speed ......................................................... 10
Standard Motor (3, 4, & 5 Ton) ............................. 10
WARRANTY INFORMATION
A warranty certifi cate with full details is included with the
Air Conditioner. Carefully review these responsibilities with
your dealer or service company. The manufacturer will not
be responsible for any costs found necessary to correct
problems due to improper setup, improper installation,
adjustments, improper operating procedure on the part
of the user, etc. Some specifi c examples of service calls
which are not included in the limited warranty are:
• Correcting wiring problems in the electrical circuit
supplying the Air Conditioner.
• Resetting circuit breakers or other switches.
• Adjusting or calibrating of thermostat.
Startup & Adjustments ............................................ 11
Pre - Start Checklist................................................ 11
Installing Initial Refrigerant Charge ........................11
Start - Up Procedure .............................................. 11
System Cooling .................................................... 11
Short Cycle Protection ......................................... 11
Adjustment of Refrigerant Charge ..........................1 1
Charge Verifi cation for R-22 Units in AC Mode w/
Outdoor Temperatures above 55° F ........................1 1
Air Conditioner Maintenance ................................... 12
Component Functions .............................................12
High Pressure Switch ............................................. 12
Low Pressure Switch .............................................. 12
Replacement Parts ................................................... 12
Figures & Tables ....................................................... 13
Figure 11 - Unit Dimensions ................................ 13
Table 1 - P3RA Physical Data .............................. 13
Wiring Diagrams .....................................................14
Figure 12 - Single Phase - 3, 4, & 5 Ton .............. 14
Figure 13 - Three Phase - 5 Ton Only .................. 15
Refrigerant Charging Charts .................................. 16
Figure 14 - 3 Ton Units ......................................... 16
Figure 15 - 4 Ton Units ......................................... 16
Figure 16 - 5 Ton Units ......................................... 17
Blower Performance ...............................................17
Table 2 - P3RA Airfl ow Data ................................. 17
Installation / Performance Checklist ....................... 20
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USER INFORMATION
IMPORTANT SAFETY INFORMATION
Safety markings are used 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.
OPERATING INSTRUCTIONS
NOTE: Thermostat styles vary. Some models may not
include the AUTO mode and others will have the AUTO
in addition to HEAT and COOL selections. Please refer to
the thermostat manufacturer’s User manual for detailed
programming instructions.
NOTE: If the temperature level is re-adjusted, or the system
mode is reset, the fan and compressor in the unit may not
start immediately. A protective timer circuit may hold the
compressor and the outdoor fan off for approximately 5
minutes following a previous operation or the interruption
of the main electrical power.
Cooling Operation
1. Set the thermostat’s system mode to COOL or AUTO
and change the fan mode to AUTO. See Figure 1.
2. Set the temperature selector to the desired temperature
level. The outdoor fan, compressor, and blower motor will
all cycle on and off to maintain the indoor temperature
at the desired cooling level.
Heating Operation (optional)
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 furnace or electric heater kit
and blower motor will cycle on and off to maintain
the indoor temperature at the desired heating level.
Turning the Air Conditioner OFF
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.
Operating the Indoor Blower Continuously
The continuous indoor blower operation is typically used to
circulate the indoor air to equalize a temperature unbalance
due to a sun load, cooking, or fi replace operation.
Set the thermostat fan mode to ON (Figure 1). The indoor
blower starts immediately, and will run continually until the
fan mode is reset to AUTO.
The continuous indoor blower operation can be obtained
with the thermostat system mode set in any position,
including OFF.
AIR CONDITIONER MAINTENANCE
Proper maintenance is most important to achieve the best
performance from the appliance and should be performed
frequently at the beginning of each air conditioning season.
WARNING:
Your Air Conditioner contains liquid and
gaseous refrigerant under pressure. Installation
and servicing should only be attempted by
qualifi ed, trained personnel thoroughly familiar
with the equipment and safe responsible
refrigerant handling procedures. Failure to
comply with this warning could result in
equipment damage, personal injury, or death.
• Keep the unit clean. Hose off periodically and keep unit
fi ns clear of leaves and grass clippings.
• Keep the unit clear of obstructions. DO NOT obstruct
airfl ow with tall plants or shrubs. DO NOT store gasoline
or other fl ammable materials on or near the unit.
• Never operate the appliance without a fi lter installed in
the return air duct. Inspect fi lters frequently and replace
when necessary with fi lter of same dimensional size.
Fan
Mode
Figure 1. Digital Thermostat
System
Mode
Temperature
Selector
TROUBLESHOOTING
If the unit fails to operate, check the following:
• Check the thermostat setting. Make sure the system
mode and temperature settings are correct.
• Check the electrical panel for tripped circuit breakers.
• Check the fi lters for dust accumulation.
• Check the unit and make sure it is clean and not covered
with grass or leaves.
• If the items above don’t resolve your problems, then
call your nearest service technician.
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INSTALLER INFORMATION
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:
Shut off all electrical power to the unit before
performing any maintenance or service on the
system. Failure to comply may result in personal
injury or death.
WARNING:
Unless noted otherwise in these instructions,
only factory authorized parts or accessory
kits may be used with this product. Improper
installation, service, adjustment, or maintenance
may cause explosion, fi re, electrical shock or
other hazardous conditions which may result
in personal injury or property damage.
WARNING:
P3RA Single Package Air Conditioners leave
the factory with a nitrogen holding charge.
Follow all charging instructions for maximum
unit performance and effi ciency. Some local
codes require licensed installation/service
personnel to service this type of equipment.
Refrigerant charging must be done by qualifi ed
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.
WARNING:
The information listed below must be followed
during the installation, service, and operation
of this unit. Unqualifi ed individuals should
not attempt to interpret these instructions or
install this equipment. Failure to follow safety
recommendations could result in possible
damage to the equipment, serious 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 codes for special
installation requirements.
• All electrical wiring must be completed in accordance
with local, state and national codes and regulations.
• This equipment contains nitrogen gas. Installation or
servicing should only be performed by qualifi ed trained
personnel thoroughly familiar with this type equipment.
• This unit is designed for outdoor installations only and
should be located in a position as shown on page 5.
• 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.
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Page 5
GENERAL INFORMATION
The P3RA packaged air conditioner is designed only
for outdoor ground level installations and can be readily
connected to the high static duct system of a home. This unit
has been tested for capacity and effi ciency in accordance
with A.R.I. Standards and will provide many years of safe
and dependable comfort, providing it is properly installed
and maintained. Abuse, improper use, and/or improper
maintenance can shorten the life of the appliance and
create unsafe hazards.
To achieve optimum performance and minimize equipment
failure, it is recommended that periodic maintenance be
performed on this unit. The ability to properly perform
maintenance on this equipment requires certain
mechanical skills and tools.
Before You Install this Unit
The cooling load of the area to be conditioned must be
calculated and a system of the proper capacity selected.
It is recommended that the area to be conditioned be
completely insulated and vapor sealed.
Check the electrical supply and verify the power supply
is adequate for unit operation. If there is any question
concerning the power supply, contact the local power
company.
All units are securely packed at the time of shipment and
upon arrival should be carefully inspected for damage
prior to installing the equipment at the job site. Verify
coil fi ns are straight. If necessary, comb fi ns to remove
fl attened or bent fi ns. Claims for damage (apparent or
concealed) should be fi led immediately with the carrier.
Please consult your dealer for maintenance information
and availability of maintenance contracts. Please read
all instructions before installing the unit.
• Consideration should also be given to availability of
electric power, service access, noise, and shade.
Minimum Clearance Requirements
Suffi cient clearance for unobstructed airfl ow through the
outdoor coil must be maintained in order to provide room
for proper servicing and achieve rated performance. See
Figure 2 for minimum clearances to obstructions.
Service Access Clearances
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 Combustible Materials
Supply and return air ducts .........................................0”
Duct connection side ...................................................0”
12"
24"
12"
TO BE
TOP OF UNIT
UNOBSTRUCTED
0"
Locating the Air Conditioner
• 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.
If practical, place the air conditioner and its ducts in
an area where they will be shaded from the afternoon
sun, when the heat load is greatest.
• The length of the supply and return ducts should be
kept to a minimum with no sharp radius bends.
• Overhead obstructions, poorly ventilated areas, and
areas subject to accumulation of debris should be
avoided. The hot condenser air must be discharged up
and away from the home, and if possible, in a direction
with the prevailing wind. Do not place the unit in a
confi ned space.
Figure 2. Minimum Unit Clearances
Air Duct System
Air ducts must be installed in accordance with local
codes and regulations for air conditioning and ventilation
standards.
• The supply duct system, including the number and
type of registers, will have much more effect on the
performance of the system than any other factor. The
duct must be suffi ciently large to conduct an adequate
amount of air to each register. See Figure 4 (page 7).
• Duct work should be attached directly to the unit fl 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 fl ood back
• The air conditioning output of the system will not
cool the home if air is lost to the outside through
leaks in the duct system. Ducts that are collapsed
or restricted by foreign objects will also prevent
adequate air fl ow.
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• 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.
AIR CONDITIONER INSTALLATION
Unpacking the Unit
It is recommended that the unit be unpacked at the
installation site to minimize damage due to handling.
CAUTION:
Do not tip the unit on its side. Oil may enter
the compressor cylinders and cause starting
trouble. If unit has been set on its side, restore
to upright position and do not run for several
hours. Then run unit for a few seconds. Do this
three or four times with fi ve minutes between
runs.
1. Remove the bands from around the unit.
2. Unfold the top and bottom cap fl anges.
3. Carefully remove the top cap and tube.
Installing Return & Supply Air Collars
The supply and return fi ttings are included with the unit and
located in the supply duct. They attach to the unit openings
(Figure 3) with a fl ange and bead arrangement and may
be secured with sheet metal screws. For easier access,
install fi ttings before positioning unit in fi nal location. See
Figure 11 and Table 1 (page 13) for air opening sizes.
Supply Duct
1. Position the supply duct collar so the edge of the unit
opening fi ts between the fl ange and the bead.
2. Overlap the collar ends keeping the small screw holes
underneath.
3. Align the holes in the crimped area and install one
screw. Note: It may be necessary to loosen the four
screws that hold the transition duct in order to install the
supply fi tting. Re-tighten when installation is complete.
Transition
Duct Screws
Duct
Dimples
4. Tap collar (if necessary) to ensure engagement with
unit opening and install second screw.
5. Tighten fi rst screw and rotate collar clockwise so joint
is near three o’clock position.
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 holes in the collar with the four dimples or holes
(depending on unit model) in the panel.
3. Using self-drilling screws (10-16x.5) attach the collar
to the rear panel.
Connecting the Return & Supply Air Flexible Ducts
• The return duct collar for 3 ton models is 12” diameter
and 14” for 4 & 5 ton models.
• The supply duct collar for all models is 12” diameter.
• Flexible ducts can be connected to the corresponding
fi ttings with the clamps provided with the ducts. See
Table 1. Note: To prevent a loss in cooling capacity,
make sure all connections are tight.
• The fl exible ducts may be cut to the required length,
see instructions packed with duct. Keep all ducts as
short and straight as possible. Avoid sharp bends.
• Ducts may be spliced with sheet metal sleeves and
clamps.
• After the inner duct is connected to the proper fi tting,
the insulation and plastic sleeve should be pulled over
the connection and clamped.
• Homes with multiple supply ducts (or special
applications), a Y fi tting is available to divide the
supply air so it can be ducted to different areas of the
home for more effi cient cooling. Note: For maximum
performance, insulate the Y fi tting.
Locating & Installing the Return Air Assembly
To simplify installation, locate and install the return air
assembly fi rst. If desired, the return opening can be
located inside a closet with louvered doors that has an
open area equal to or greater than a 12” x 20” grille. The
return air grille can be placed in the wall of a closet and
the air ducted into the fi lter box through a boxed-in area
at the closet fl oor level (Figure 5, page 7). Verify the fi lter
is readily accessible.
NOTE: The return air box with grille and fi lter should not
be located in heavy traffi c areas like hallways or center
of rooms. A good spot is in a corner or under a table, if a
minimum two inch clearance is available.
Supply Air
Figure 3. Return & Supply Air Collars
6
Return Air
1. Start the installation from under the home by cutting a
small hole in the subfl oor. Determine how the fl oor joist
location will affect cutting the opening needed for the
return air box. NOTE: Floor joists are generally located
on 16” centers, leaving 14-3/8” between joists.
2. After measuring the return air box (approximately 121/4” x 20-1/4”), cut the hole through the fl oor so that
the box will fi t between the fl oor joists. Care should be
taken when cutting through carpeting to avoid snags.
Page 7
MULTIPLE DUCT APPLICATIONSINGLE DUCT APPLICATION
Figure 4. Single & Multiple Duct Applications
NOTE: In most installations it will be necessary to cut a
similar hole in the fi berboard directly under the hole in
the fl oor. However, if the fl oor is more than ten inches
deep, it will only be necessary to cut a hole for the collar
on the return air box or for the insulated duct.
3. Set the box into the opening and fasten with screws or
nails.
4. Install the fi lter and return air grille in the air box.
Figure 5. Return Air Box
Locating & Installing the Supply Damper(s)
CAUTION:
If installing this air conditioning system in
conjunction with a furnace, a damper must
be installed in the furnace base assembly
to prevent cold air from being discharged
around the heat exchanger. Damage to the
heat exchanger and asphyxiation may occur if
a damper is not installed.
Check with the furnace manufacturer for damper
requirements. Failure to install the required
furnace damper may invalidate code agency
listing and limited warranty on the furnace.
When locating the supply damper(s), carefully check
fl oor joists and frame members that could interfere with
the installation of the damper or fl exible duct. Ideally, the
damper (Figure 6) 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 air conditioner is located.
Figure 6. Supply Damper
1. Locate the center of the heat duct by cutting a small
hole in the fi berboard below the duct at the desired
location.
2. Cut a hole approximately 3/4” larger than the damper
opening in the fi berboard.
3. Cut a 9-1/8” x 13-1/8” hole in the duct and bend over
all tabs fl at on the inside of the heat duct.
4. Insert the damper into the duct and bend over all tabs
fl at on the inside of the heat duct.
5. Seal the opening between the fi berboard and damper
or fl exible duct.
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Page 8
Condensate Drainage
A 3/4” condensate fi tting extends out of the side of the
unit (Figure 3). The drain trap, shipped in the electrical
compartment, must be installed to prevent water from
collecting inside the unit.
1. Thread the elbow provided with the unit into the drain
connection until hand tight.
2. Connect the condensate tubing onto the fi tting, forming
a trap near the drain connection.
3. Route the condensate tube from the trap to a suitable
drain. NOTE: For proper drainage, make sure the trap is
level to the ground and tubing outlet is below trap level.
ELECTRICAL CONNECTIONS
WARNING:
To avoid risk of 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.
Label all wires prior to disconnection when
servicing the unit. Wiring errors can cause
improper and dangerous operation.
Elbow
Line Voltage
Low Voltage
P-Trap
Figure 7. Drain Trap
Figure 8. Power Entry
• All electrical connections must be in compliance with
all applicable local codes, ordinances, and current
national codes.
Pre-Electrical Checklist
Verify that the voltage, frequency, and phase of the
supply source match the specifi cations on the unit
rating plate.
Verify that the ser vice provided by the utility is suffi cient
to handle the additional load imposed by this equipment.
Refer to the unit wiring label for proper high and low
voltage wiring.
Verify factory wiring is in accordance with the unit wiring
diagram (Figures 12 or 13, pages 14 & 15). Inspect for
loose connections.
Phase balance on 3 phase units must always be
checked. See Unbalanced 3-Phase Supply Voltage
section (page 9).
Line Voltage
• A wiring diagram is located on the inside cover of the
electrical box of the unit. The installer should become
familiar with the wiring diagram before making any
electrical connections to the unit.
• An electrical disconnect must be located within
sight of and readily accessible to the unit. This
switch shall be capable of electrically de-energizing
the unit.
• Line voltage to the unit should be supplied from a
dedicated branch circuit containing the correct fuse
or circuit breaker for the unit. Incoming fi eld wiring
and minimum size of electrical conductors and circuit
protection must be in compliance with information listed
on the unit data label. Any other wiring methods must
be acceptable to authority having jurisdiction.
• Provide power supply for the unit in accordance with the
unit wiring diagram, and the unit rating plate. Connect
the line-voltage leads to the terminals on the contactor
inside the control compartment. Extend leads through
power wiring hole (Figure 8). Connect L1 & L2 directly
to the contactor. For 3 phase models, connect L3 to
the contactor.
• The unit requires both power and control circuit electrical
connections. Refer to the wiring diagram / schematic
8
Page 9
(Figures 12 & 13, pages 14 & 15)) for identifi cation and
location of unit fi eld wiring interfaces. Make all electrical
connections in accordance with all applicable codes
and ordinances.
• 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.
See the unit rating plate for minimum circuit ampacity
and maximum overcurrent protection limits.
• Use only copper wire for the line voltage power supply
to this unit. Use proper code agency listed conduit and
a conduit connector for connecting the supply wires to
the unit. Use of rain tight conduit is recommended.
• 208/230 Volt units are shipped from the factory wired
for 230 volt operation. For 208V operation, remove the
lead from the transformer terminal marked 240V and
connect it to the terminal marked 208V.
• Optional equipment requiring connection to the power
or control circuits must be wired in strict accordance of
all applicable local codes, and the instructions provided
with the equipment.
Overcurrent Protection
Generally, the best fuse or breaker for any air conditioner
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 or, in the absence of local codes, with
the national codes. Ground the air conditioning unit using
the green grounding screw provided in the control panel.
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 effi ciency 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:
1. Measure the line
voltages of your 3 phase
Example
:
power supply where it
enters the building and
at a location that will
only be dedicated to
the unit installation
AB = 226V
BC = 230V
AC = 227V
(at the units circuit
protection or disconnect).
2. Determine the average voltage in the power supply.
In this example, the measured line voltages were
226, 230, and 227. The average would be 228 volts
(226 + 230 + 227 = 683 / 3 = 228).
3. Determine the maximum deviation:
Example:
From the values given in step 1, the BC voltage
(230V) is the greatest difference in value from
the average:
230 - 228 = 2
Highest Value
228 - 226 = 2
228 - 227 = 1
4. Determine percent of
100
Example:
2
x
= 0.88%
voltage imbalance by using
the results from steps 2 &
3 in the following equation.
228
max voltage deviation
% Voltage Imbalance
=100x
from average voltage
average voltage
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%.
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Page 10
Thermostat / Low Voltage Connections
• The unit is designed to operate from a 24 VAC Class II
control circuit. The control circuit wiring must comply with
applicable local codes having jurisdiction. Thermostat
connections should be made in accordance with the
instructions supplied with the thermostat and the indoor
equipment.
• The low voltage wires must be properly connected.
Route 24V control wires through the sealing grommet
(Figure 8, page 8) near the power entrance.
• Single stage thermostats can be used with this
equipment.
• The thermostat should be mounted about 5 feet
above the fl oor on an inside wall. DO NOT install the
thermostat on an outside wall or any other location
where its operation may be adversely affected by radiant
heat from fi replaces, sunlight, or lighting fi xtures, and
convective heat from warm air registers or electrical
appliances. Refer to the thermostat manufacturer’s
instruction sheet for detailed mounting information.
Cooling Thermostat
Connect the red & yellow wires from the unit to the R
& Y terminals on the thermostat subbase. Connect the
green wire to the yellow wire at the unit. See Figure 9.
Heat/Cool Thermostat
This unit requires the use of a single stage Heating/
Cooling thermostat. The heat/cool thermostat prevents
simultaneous operation of the heating and cooling modes
of operation and is equipped with an ON-AUTO fan mode
that allows the home owner to operate the indoor blower
when only air circulation is desired. Connect the red,
yellow, green and brown low voltage wires to the R or
RC, Y, G, & W terminals respectively on the thermostat
base. The black wire is the 24 volt common required on
some thermostats. See Figure 9.
If you have one thermostat for heating and another
for cooling, they must be interlocked to prevent
simultaneous operation. See Figure 10.
1. Turn the heating ther mostat to its lowest possible setting.
2. If the cooling thermostat has an “On/Off” switch, turn
it “On.”
3. Set the cooling thermostat to the desired temperature.
4. Turn the power on. Your air conditioner should start
when room temperature exceeds the thermostat setting.
Cooling
Thermostat
R
To Air Conditioner
Double Throw
Double Pole Switch
Furnace
Thermostat
R
To Furnace
Figure 10. Thermostat Interlock System
Blower Speed
For optimum system performance and comfort, it may be
necessary to change the factory speed setting.
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.
4 Wire Heat/Cool Thermostat
R
Y
G
W
R
Y
G
W
Optional
Outdoor Thermostat
(Field Supplied)
Single Stage Electric Heat
RED
YELLOW
GREEN
BROWN
ORANGE
RED
YELLOW
GREEN
BROWN
ORANGE
Two Stage Electric Heat
2 Wire Cooling Thermostat
R
Y
Figure 9. Low Voltage Connections
10
RED
YELLOW
GREEN
BROWN
Control Wire Legend
Green - Blower Relay
Red - Transformer
24V
Yellow - Cooling 1st
Stage
Brown - Heating 1st
Stage
Orange - Heating 2nd
Stage
Standard Motor (3, 4, & 5 Ton)
1. Disconnect all electrical power to the unit and remove
the service panel.
2. Place the desired blower speed lead on the COM
terminal. Use another wire tie (fi eld supplied) to bundle
the remaining motor leads.
3. Check all factory wiring as shown in the wiring diagram
and inspect the connections to make sure none of them
loosened during shipping or installation.
Page 11
START UP & ADJUSTMENTS
Before You Start the Unit
The following check list should be observed prior to
starting the unit.
Verify the unit is level and allows proper condensate
drainage.
Verify the outdoor coil and top of the unit are free from
obstructions and debris, and all equipment access/
control panels are in place. Unit must be installed with
the proper clearances as listed in Figure 2 (page 5).
Verify that the duct work is sealed to prevent air leakage.
Verify that the line voltage power leads are securely
connected and the unit is properly grounded. Check
the condenser fan to make sure it turns freely.
Verify the thermostat is wired correctly and installed
in a proper location. Make sure the low voltage wires
are securely connected to the correct leads on the low
voltage terminal strip.
Verify that the power supply branch circuit overcurrent
protection is sized properly.
Installing Initial Refrigerant Charge
IMPORTANT: Before you start unit, perform the following
procedures to install the initial charge on units that are
factory shipped with a nitrogen holding charge:
1. Read all installation instructions fi rst.
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
minutes.
5. Inspect the unit rating plate for the proper type of
refrigerant and quantity.
6. Weigh in the proper amount of new (or reclaimed)
refrigerant.
Start-Up Procedure
The control circuit may consist of an anti-short cycle timer
that will not let the compressor re-start before 5 minutes
have elapsed.
1. Set the system mode to OFF and the temperature
mode to its highest setting.
2. Turn power on at the disconnect switch.
3. Set the system mode to ON or COOL.
4. Set the temperature mode below room temperature.
Verify that the indoor blower, outdoor fan, and
compressor energize and the cooling function starts.
5. Verify the discharge air grilles are adjusted and the
system air is balanced.
6. Verify the duct work has no air leaks.
7. Verify the condensate drain is installed correctly and
functions properly.
8. Set the temperature mode above room temperature.
The unit should stop.
9. Instruct the homeowner on unit and thermostat operation
and fi lter servicing.
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. Verify
HI and LO refrigerant pressures.
FOR 3-Phase Models Only: If refrigerant pressures are
abnormal and the compressor is rotating backwards, shut
off main power to the unit and switch any two fi eld wires
at the disconnect. DO NOT alter unit wiring.
Short Cycle Protection
The control circuit may be 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 deenergizes. 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.
Adjustment of Refrigerant Charge
CAUTION:
This air conditioner contains liquid and gaseous
refrigerant under pressure. Adjustment of
refrigerant charge should only be attempted
by qualifi ed, trained personnel thoroughly
familiar with the equipment and safe responsible
refrigerant handling procedures. Under no
circumstances should the homeowner attempt
to install and/or service this equipment. Failure
to comply with this warning could result in
equipment damage, personal injury, or death.
• To achieve rated capacity and effi ciency the compressor
must run for a minimum of 12 hours.
• The refrigerant charge can be checked and adjusted
through the service ports provided external to the
unit. Use only gage line sets which have a “Schrader”
depression device present to actuate the valve.
Charge Verifi cation for R-22 Units in AC Mode with
Outdoor Temperatures Above 55° F
1. With the system operating at steady-state, measure
the discharge refrigerant pressure in psig at the service
valve.
2. Measure the suction refrigerant pressure (psig) at the
service valve.
3. Determine the appropriate charge from the charts
(Figures 14 - 16, pages 16 - 17) for the discharge
temperature measured.
11
Page 12
AIR CONDITIONER 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 air conditioner. The ability to properly
perform maintenance on this equipment requires certain
mechanical skills and tools. If you do not possess these
skills, contact your dealer for maintenance. Consult your
local dealer about the availability of maintenance contracts.
Routine maintenance should include the following:
• Inspect and clean or replace air fi lters at the beginning
of each heating and cooling season, or more frequently
if required.
• Inspect the condensate drain and outdoor coil at the
beginning of each cooling season. Remove any debris.
Clean the outdoor coil and louvers as necessary using
a mild detergent and water. Rinse thoroughly with water.
• Inspect the electrical connections for tightness at the
beginning of each heating and cooling season. Service
as necessary.
CAUTION:
The unit should never be operated without a
fi lter in the return air system. Replace disposable
fi lters with the same type and size.
• Do not attempt to ad d additional oil to motors unequippe d
with oil tubes. The compressor is hermetically sealed
at the factory and does not require lubrication.
COMPONENT FUNCTIONS
High Pressure Switch (HPS) - Optional
A high-pressure switch may be installed and located in
the liquid line internal to the unit. The switch is designed
to protect the system when very high pressures occur
during abnormal conditions. Under normal conditions,
the switch is closed. If the liquid pressure rises above 425
psig, the switch will open and de-energize the unit. The
switch will close again once the liquid pressure decreases
to 360 psig. Please note that the switch interrupts the
thermostat inputs to the unit. When the switch opens and
then closes, there may be a 5 minute short cycling delay
before the unit will energize.
Low Pressure Switch (LPS) - Optional
A low-pressure switch may be installed and located in the
suction line internal to the unit. The switch is designed
to protect the compressor from a loss of charge. Under
normal conditions, the switch is closed. If the suction
pressure falls below 5 psig, the switch will open and deenergize the unit. The switch will close again once the
suction pressure increases above 20 psig. Please note
that the switch interrupts the thermostat inputs to the unit.
When the switch opens and then closes, there may be a
5 minute short cycling delay before the unit will energize.
REPLACEMENT PARTS
Replacement parts are available through all Nordyne
Please have the complete model and serial number of the unit
when ordering replacement parts.
ELECTRICAL:
Capacitors Temperature Limit Switches
Compressors Thermostats
Contactors Time Delay Relays
Pressure Switches Transformers
Relays
MOTORS:
Blower Motor
Fan Motor
COMPONENTS:
Blower Assembly Fan Grille
Cabinet Panels Filter/Driers
distributors.
12
Page 13
FIGURES & TABLES
W
L
Electric Heater Power Supply
Power Supply
Low Voltage Supply
3.15
Top View
3.0
9.15
1"
9.04
A
5.5
17.50
12" diameter
Supply Duct
Opening
Back (Duct) View
B
14" diameter
Return Duct
Opening
H
17.86
15.36
10.10
1.38
Control
Access
Panel
3.2
12.13
Blower Access Panel
3/4" NPT
Drain Connection
18.01
Side View
1"
3.2 5.29
Figure 11. Unit Dimensions
Model No.
P3RA-
036KA 49 35 22.2 35.02 2.48
048KA 49 35 30.2 35.02 2.48
060KA 49 35 30.2 35.02 2.48
060CA 49 35 30.2 35.02 2.48
Length
-L-
Width
W
Height
-H-
-A- -B-
Return Diameter
(in)
12 12
14 12
14 12
14 12
Supply Diameter
(in)
Table 1. P3RA Physical Data
13
Page 14
zH06esahP elgniStloV 032/802renoitidnoC riA degakcaP llamS
WIRING DIAGRAMS
Screw
Ground
Circuit Breaker
1-Phase
Supply Voltage
L1L2
3. Ne convient pas aux installations de plus de 150V a la terre.
1. Couper le courant avant de faire letretien.
2. Employez uniquement des conducteurs en cuivre.
(optional)
BROWN
BLOWER
CAPACITOR
S
T2 T1
CONTACTOR
YE/BK
STRIPE
(SELECT MODELS)
YE/BK
STRIPE
C
R
COMPRESSOR
YE/BK STRIPE
BLACK
C
S
BK/WH STRIPE
YELLOW
ORANGE
R
OUTDOOR FAN
RED
HFC
BLUE
MOTOR
DUAL CAPACITOR
YELLOW
YELLOW
0310
7110860
¢711086-¤
W2
R
To Thermostat
YG
a Yellow Wire
Pressure Switch
On Units with no
connects Y to CC
WHITE
RED
SEE NOTE 5
Kit connection
9 Pin Plug for Heater
WHITE
MOTOR
C
S
L
H
FUSE
BLACK
BROWN
COM
SPEED UP
RELAY CONTROL
BOARD
N.O.
N.C.
XFMR-R
XFMR-C
RED RED
R
GRAY
GREEN
G
C
RED
BLUE
YELLOW
RED
WHITE
WHITE
RED
heat is applied
in place if no electric
Jumper Plug must be
1 2 3 4 5 6 7 8 9
1 2 3 4 5 6 7 8 9
BROWN
ORANGE
L2 L1
BLACK
BLACK
LOW PRESS SW
5. Two speed motor lead connections: Black - High (default)
Red - Low
NOTES:
1. Disconnect all power before servicing.
WIRING DIAGRAM
2. For supply connections use copper conductors only.
6. For 208V operation remove white wire from 230V tap and
place on 208V tap.
MOTOR
BLOWER
S
LINE VOLTAGE
CAPACITOR
L2 L1
3. Not suitable on systems that exceed 150V to ground.
4. For replacement wires use conductors suitable for for 105° C.
93
SEE NOTE 5
C
L
H
RCB
COM
N.O.
RCB
N.C.
RCB
5
4
6
T1
R
C
T2
COMPRESSOR
CC1
RED
240 208
24V
COM
C
F
H
DUAL CAPACITOR
S
S
FAN MOTOR
C
YELLOW
SEE NOTE 6
TRANSFORMER
R
TRANSFORMER
240 208
COM
SEE NOTE 6
HIGH
PRESS SW
(SELECT MODELS)
YELLOW
CC
7
24V
C
G
Logic
R
RELAY CONTROL BOARD
LOW
PRESS SW
(SELECT MODELS)
HIGH
PRESS SW
FUSE
3 AMP
LEGEND:
FIELD WIRING
LOW VOLTAGE
HIGH VOLTAGE
2
1
Number indicates pin location
- Indicates plug connection
CC - Contactor Coil
RCB - Relay Control Board
1
RG YW2
Figure 12. P3RA - Single Phase with PSC Motor - 3, 4, & 5 Ton Models
14
Page 15
zH06esahP eerhTtloV 032/802renoitidnoC riA degakcaP llamS
WIRING DIAGRAMS - CONTINUED
Screw
Ground
Circuit Breaker
L1L3
3-Phase
Supply Voltage
L2
1. Couper le courant avant de faire letretien.
2. Employez uniquement des conducteurs en cuivre.
3. Ne convient pas aux installations de plus de 150V a la terre.
(optional)
WHITE
RED
SEE NOTE 5
Kit connection
9 Pin Plug for Heater
C
MOTOR
BLOWER
S
BROWN
CAPACITOR
WHITE
L
H
FUSE
BLACK
BROWN
COM
SPEED UP
RELAY CONTROL
BOARD
N.O.
N.C.
XFMR-R
XFMR-C
RED RED
R
GRAY
GREEN
G
C
RED
BLUE
YELLOW
RED
Jumper Plug must be
WHITE
WHITE
RED
heat is applied
in place if no electric
1 2 3 4 5 6 7 8 9
1 2 3 4 5 6 7 8 9
BROWN
ORANGE
L1
L2
L3
BLACK
LOW PRESS SW
BLACK
COMPRESSOR
T1
T2
T3
YE/BK
STRIPE
YE/BK
STRIPE
T2
T3
CONTACTOR
(SELECT MODELS)
T1
BK/WH STRIPE
YE/BK STRIPE
BLACK
C
S
RED
R
YELLOW
ORANGE
OUTDOOR FAN
0310
7110900
¢711090u¤
W2
R
To Thermostat
YG
CAPACITOR
BLUE
YELLOW
a Yellow Wire
Pressure Switch
On Units with no
connects Y to CC
MOTOR
YELLOW
5. Two speed motor lead connections: Black - High (default)
Red - Low
2. For supply connections use copper conductors only.
1. Disconnect all power before servicing.
NOTES:
WIRING DIAGRAM
place on 208V tap.
6. For 208V operation remove white wire from 230V tap and
MOTOR
BLOWER
S
LINE VOLTAGE
CAPACITOR
L2L3 L1
3. Not suitable on systems that exceed 150V to ground.
4. For replacement wires use conductors suitable for for 105° C.
93
SEE NOTE 5
C
L
H
RCB
COM
N.O.
RCB
N.C.
RCB
5
4
6
COMPRESSOR
T3
T3
CC3
CC1
RED
T1
CC2
240 208
24V
COM
CAPACITOR
F
T1
S
T2
T2
FAN MOTOR
C
YELLOW
SEE NOTE 6
TRANSFORMER
R
TRANSFORMER
240 208
COM
SEE NOTE 6
HIGH
PRESS SW
(SELECT MODELS)
YELLOW
CC
7
24V
C
G
Logic
R
RELAY CONTROL BOARD
LOW
PRESS SW
(SELECT MODELS)
HIGH
PRESS SW
3 AMP
FUSE
LEGEND:
FIELD WIRING
LOW VOLTAGE
HIGH VOLTAGE
2
1
- Indicates plug connection
Number indicates pin location
RCB - Relay Control Board
CC - Contactor Coil
1
RG YW2
Figure 13. P3RA Wiring Diagram - 3 Phase with PSC Motor (5 Ton Models Only)
15
Page 16
REFRIGERANT CHARGING CHARTS
Refrigerant Charging Chart Legend:
Shaded boxes indicate fl ooded conditions.
Rated design values. The suction pressure will vary from design value if outdoor air fl 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.
OUTDOOR TEMPERATURE
Suct.
Press.
67 192 159
69
71 196 170
73
75 202 178
77 218 181
79 234 184
81 250 188
83 254 191 266 191
85 270 195 282 194
87 286 199 298 198
89 302 202 314 201
91 318 206
93
70° F 75° F 80° F 85° F 90° F 95° F 100° F 105° F
Dis.
Dis.
Dis.
Press.
194 165
198 175
Temp.
Press.
208 163
210 168
212 173
214 178
Dis.
Temp.
Dis.
Press.
224 167
226 172
228 177
231 181
Dis.
Temp.
Dis.
Press.
239 171
242 175
244 180
247 184
Dis.
Temp.
Dis.
Press.
255 174
257 179
260 183
263 187
Dis.
Temp.
Dis.
Press.
Temp.
271 178
273 182
275 186
279 190
Dis.
Dis.
Press.
287 181
289 185
291 189
295 194
Dis.
Temp.
Dis.
Press.
303 185
305 188
307 192
311 197
Dis.
Temp.
Figure 14. Charging Chart for 3 Ton Units
OUTDOOR TEMPERATURE
Suct.
Press.
69 205 160
71
73 210 170
75
77 215 180
79 231 184
81 248 188
83 265 192
85 268 196 282 197
87 285 201 298 202
89 302 206 315 206
91 318 211 332 211
93 335 216
95
70° F 75° F 80° F 85° F 90° F 95° F 100° F 105° F
Dis.
Dis.
Dis.
Dis.
Dis.
Press.
Temp.
207 165
211 177
Press.
Temp.
222 165
224 170
226 175
228 181
Press.
238 170
240 175
242 180
245 185
Dis.
Temp.
Dis.
Press.
255 175
257 180
259 185
261 189
Dis.
Temp.
Dis.
Press.
Temp.
271 180
273 185
275 189
278 193
Dis.
Dis.
Press.
Temp.
287 185
289 189
291 193
295 197
Dis.
Dis.
Press.
304 190
306 194
308 198
312 202
Dis.
Temp.
Dis.
Press.
320 194
322 198
324 202
328 207
Dis.
Temp.
16
Figure 15. Charging Chart for 4 Ton Units
Page 17
REFRIGERANT CHARGING CHARTS - CONTINUED
OUTDOOR TEMPERATURE
Suct.
Press.
62 208 161
64
66 213 172
68
70 218 182
72 235 186
74 253 191
76 271 196
78 274 199 288 201
80 292 205 306 206
82 309 210 324 211
84 327 215 341 216
86 345 221
88
70° F 75° F 80° F 85° F 90° F 95° F 100° F 105° F
Dis.
Dis.
Dis.
Dis.
Dis.
Press.
Temp.
211 166
214 179
Press.
Temp.
226 167
228 172
230 177
232 183
Press.
243 173
245 178
248 182
250 188
Dis.
Temp.
Dis.
Press.
261 178
263 183
265 188
267 192
Dis.
Temp.
Dis.
Press.
Temp.
278 184
280 188
282 193
285 197
Dis.
Dis.
Press.
Temp.
295 189
297 193
299 198
303 202
Dis.
Dis.
Press.
312 194
314 198
316 202
320 207
Dis.
Temp.
Figure 16. Charging Chart for 5 Ton Units
Dis.
Press.
330 199
332 203
333 207
338 212
Dis.
Temp.
BLOWER PERFORMANCE
Model Number
P3RA
036KA
048KA
060KA
060CA
1
Based on 230 Volt operation, dry coil, and no fi lters.
High 1480 1440 1390 1330 1270 1190
Low 1270 1230 1190 1140 1080 1000
High 1840 1780 1730 1650 1580 1500
Low 1700 1650 1590 1540 1470 1390
High 1800 1740 1680 1620 1540 1470
Low 1660 1610 1560 1500 1430 1360
High 1800 1740 1680 1620 1540 1470
Low 1660 1610 1560 1500 1430 1360
0.1 0.2 0.3 0.4 0.5 0.6
External Static Pressure (in. WC)
NOTE: Blower performance data shown above 0.30” WC external static pressure(ESP) is for reference only.
Maximum allowable external static pressure with electric heat added to unit is 0.30” WC.
Table 2. P3RA Airfl ow Data
1
17
Page 18
18
Page 19
19
Page 20
INSTALLATION / PERFORMANCE CHECK LIST
INSTALLATION ADDRESS:
CITY ________________________ STATE ________________
UNIT MODEL # ________________________________________
UNIT SERIAL # ________________________________________
Unit Installed Minimum clearances per
Figure 2 (page 5)?
INSTALLER NAME:
CITY _______________________ STATE ________________
ELECTRICAL SYSTEM:
Electrical connections tight? YES NO
Line voltage polarity correct? YES NO
Has the thermostat been calibrated? YES NO
Is the thermostat level? YES NO
Is the heat anticipator setting correct?
(If Applicable)
This section for 3-Phase models only
YES NO
YES NO
REFRIGERATION SYSTEM:
Was unit given 24 hr warm up period
for crankcase heaters (if installed)?
Stage-1 Liquid Pressure (high side) ________________________
Stage-1 Suction Pressure (low side) ________________________
Has the owner’s information been
reviewed with the customer?
Has the Literature Package been left
with the unit?
YES NO
YES NO
YES NO
INSTALLER
PLEASE LEAVE THESE INSTALLATION
INSTRUCTIONS WITH THE HOMEOWNER.
Rated Voltage: ______________________________________ VOLTS
L1-L2 Volts: ________________________________________ VOLTS
L1-L3 Volts: ________________________________________ VOLTS
L2-L3 Volts: ________________________________________ VOLTS
Avg. Volts: _________________________________________ VOLTS
Max. deviation of voltage
from avg. volts: ______________________________________ VOLTS
% Volt imbalance: ___________________________________ VOLTS
O’ Fallon, MO
¢709180#¤
7091800
7091800 (Replaces 7085580)
Specifi cations & illustrations subject to change
without notice or incurring obligations.
Printed in U.S.A. (04/10)
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