Nordyne P3RA, P3RA-036KA, P3RA-048KA, P3RA-060KA, P3RA-060CA Installation Manual
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
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
2
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.
3
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.
4
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.
5
• 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.
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