NORTEK P7RF-K Air Conditioner Installation Guide

P7RF-K / PPA3RFX-K SERIES
INSTALLATION INSTRUCTIONS
SINGLE PACKAGE AIR CONDITIONER – 2 STAGE, R410A

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

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, death 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 units are fully charged with R-410A refrigerant and ready for installation. When a system is installed according to these instructions, no refrigerant charging is required.
If repairs make it necessary for evacuation and charging, it should only be attempted by qualified, trained personnel thoroughly familiar with this equipment. Some local codes require licensed installation service personnel to service this  type of equipment. Under no circumstances should the equipment owner attempt to install and/or service this equipment. Failure to comply with this warning could result in equipment damage, personal injury, or death.
CAUTION:
This unit uses R-410A refrigerant. 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. Unqualified individuals should not attempt to interpret these instructions or install this equipment. If you do not posses  mechanical skills or tools, call your local dealer for assistance.
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 building codes and the National Electrical Code (ANSI CI) for special installation requirements.

• All electrical wiring must be completed in accordance with local, state and national codes and regulations and with the National Electric Code (ANSI/NFPA 70) or in Canada the Canadian Electric Code Part 1 CSA C.22.1.

• This equipment contains liquid and gaseous refrigerant under high pressure. DO NOT USE ANY PORTION OF THE
  CHARGE FOR PURGING OR LEAK TESTING. Installation or servicing should only be performed by qualified trained personnel thoroughly familiar with this type 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.

• This unit is designed for outdoor installations only and should be located in a position as shown on page 3.

• 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.

• The installer should become familiar with the units wiring diagram before making any electrical connections to the unit.
  See the unit wiring label or Figure 14 (page 14), Figure 15 (page 15), or Figure 16 (page 16).

GENERAL INFORMATION
This 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 efficiency in accordance with AHRI 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.
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 flattened  or bent fins. Claims for damage should be filed immediately with the carrier.
• Please consult your dealer for maintenance information and availability of maintenance contracts. Please read all instructions before installing the unit.

Locating the 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 confined space.

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

Minimum Clearance Requirements
Sufficient clearance for unobstructed airflow through the outdoor coil must be maintained in order to provide room for proper servicing and achieve rated performance. See Figure 1 (page 3) for minimum clearances to obstructions.
Service Access Clearance
Blower and electrical control access panels ………….. 24”
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”
Air Duct System
Air ducts must be installed in accordance with the standards of the National Fire Protection Association “Standard for Installation of Air Conditioning and Ventilation Systems” (NFPA 90A), “Standard for Installation of Residence Type Warm Air Heating and Air Conditioning Systems” (NFPA 90B), these instructions, and all applicable codes. NFPA publications are avaialable by writing to: National Fire Protection Association, Batterymarch Park, Quincy, ME 02269 or visit www.NFPA.org on the web. 

• Design the duct work according to methods described by the Air Conditioning Contractors of America (ACCA).
• The supply duct system, including the number and type of registers, will have much more effect on the performance of the system than any other factor. The duct must be sufficiently large to conduct an adequate amount of air to  each register. See Figure 2.
• Duct work should be attached directly to the unit flanges 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 flood 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 flow.
• 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 five minutes between runs.

1. Remove the bands from around the unit.
2. Unfold the top and bottom cap flanges.
3.  Carefully remove the top cap and tube.

Installing Return & Supply Air Collars
If the supply and return collars are supplied with the unit, they will be located in the supply duct. They can be easily positioned over the unit openings and secured with sheet metal screws.  See Figure 3.

• The diameter of the return duct collar is 14”.
• The diameter of the supply duct collar is 12”.
• Before permanently installing the collars, it is recommended you pre-fit them over the openings first to determine best fit and alignment.

Supply Duct

1. Position the supply duct collar so the edge of the unit opening fits between the flange 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 fitting.
   Re-tighten when installation is complete.

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

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

Return Duct

1. 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 unit opening. Align the four holes in the collar with the four dimples or holes (depending on unit model) in the panel.

4. Secure the collar to the rear panel using self drilling screws (10-16x.5).

Connecting the 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 fittings with the clamps provided with the ducts. NOTE: To prevent a loss in cooling capacity, make sure all connections are tight.
• Ducts may be spliced with sheet metal sleeves and clamps.
• After the inner duct is connected to the proper fitting, the insulation and plastic sleeve should be pulled over the connection and clamped.

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

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 air ducted into the filter box through a boxed-in area at the closet floor level (Figure 4). Verify the filter is readily accessible.
NOTE: The return air box with grille and filter 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 subfloor. Determine how the floor joist location will affect cutting the opening needed for the return air box.
   NOTE: Floor joists are generally located on 16” centers, leaving 14-3/8” between joists.

2. After measuring the return air box (approximately 12-1/4” x 20-1/4”), cut the hole through the floor so that the box will fit between the floor joists. Care should be taken 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 floor. However, if the floor 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 the 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 floor joists and frame members that could interfere with the installation of the damper or flexible duct. Ideally, the damper should be located in the bottom of the main duct, forward of  center of the home, at least three feet from the nearest register. See Figure 5. The round supply opening in the slanted side of the damper should face the side of the home where the air conditioner 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 flat on the inside of the heat duct.
4. Insert the damper into the duct and bend over all tabs flat on the inside of the heat duct.
5. Seal the opening between the fiberboard and damper or flexible duct.

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.

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 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:
ELECTRICAL SHOCK, FIRE OR EXPLOSION HAZARD
Failure to follow safety warnings exactly could result in serious injury, death 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.
• All electrical connections must be in compliance with all applicable local codes and ordinances, and with the current revision of the National Electric Code (ANSI/NFPA 70).
• For Canadian installations the electrical connections and grounding shall comply with the current Canadian Electrical Code (CSA C22.1 and/or local codes).

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 diagrams: Figure 14 (page 14), Figure 15 (page 15), or
  Figure 16 (page 16). Inspect for loose connections.

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 field 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. Connect L1 & L2 directly to the contactor. See Figure 7 (page 6) for power entry locations.
• The unit requires both power and control circuit electrical connections. Refer to the wiring diagram for identification and location of unit field wiring interfaces. Make all electrical connections in accordance with all applicable codes  and ordinances. Figure 14, Figure 15, or Figure 16.
• 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.
• 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.
• 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.
• Optional equipment requiring connection to the power or control circuits must be wired in strict accordance of the NEC (ANSI/NFPA 70), applicable local codes, and the instructions provided with the equipment.

COPPER WIRE SIZE — AWG (1% Voltage Drop)

Supply Wire Length-Feet|

Supply Circuit Ampacity

200| 150| 100| 50
6| 8| 10| 14| 15
4| 6| 8| 12| 20
4| 6| 8| 10| 25
4| 4| 6| 10| 30
3| 4| 6| 8| 35
3| 4| 6| 8| 40
2| 3| 4| 6| 45
2| 3| 4| 6| 50
2| 3| 4| 6| 55
1| 2| 3| 4| 60

Wire Size based on N.E.C. for 60° type copper conductors.
Table 1. Copper Wire Size

Thermostat Wire Gauge| Recommended T-Stat Wire Length (Unit to T-Stat)
---|---
2-Wire Heating)| 5-Wire (Heating/Cooling)
24| 55| 25
22| 90| 45
20| 140| 70
18| 225| 110

Table 2. Thermostat Wire Gauge

Grounding

WARNING:
The unit cabinet must have an uninterrupted or unbroken electrical ground to minimize personal injury if an electrical fault should occur. Do not use gas piping as an electrical ground!
This unit must be electrically grounded in accordance with local codes or, in the absence of local codes, with the National Electrical Code (ANSI/NFPA 70) or CSA C22.1 Electrical Code.
Ground the air conditioning unit using the green grounding screw provided in the control panel.
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.
Thermostat / Low Voltage Connections

• These units are designed to operate with a 24 VAC Class II control circuit. The control circuit wiring must comply with the current provisions of the NEC (ANSI/NFPA 70) and with applicable local codes having jurisdiction.  Thermostat connections should be made in accordance with the instructions supplied with the thermostat and the indoor equipment.
• The low voltage wires must be properly connected. Route 24V control wires through the sealing grommet near the power entrance. See Figure 7 (page 6). Connect the control wires to the defrost board and blower relay wire.  Recommended wire gauge and wire lengths for typical thermostat connections are listed in Table 2.
• Single stage or two-stage heating thermostats can be used with this equipment depending on optional accessories installed with the unit. Select a thermostat that operates in conjunction with the installed accessories.
• The thermostat should be mounted about 5 feet above the floor on an inside wall. DO NOT install the thermostat on an outside wall or any other location where its operation may be adversely affected by radiant heat from fireplaces,  sunlight, or lighting fixtures, and convective heat from warm air registers or electrical appliances. Refer to the thermostat manufacturer’s instruction sheet for detailed mounting information.
• The 16 SEER air conditioner uses a special two speed compressor to achieve a high level of efficiency in a compact frame. For the highest efficiency, the use of a 2-stage Heat/Cool thermostat should be used with this unit. The heat/ cool thermostat prevents simultaneous operation of the heating and cooling units and is equipped with an ON-AUTO fan mode that allows the home owner to operate the indoor blower when only air circulation is desired.

Heat/Cool Thermostat
A 2 stage Cooling thermostat is recommended for this product. A single or two stage heating thermostat may be used depending on the optional accessories installed with the unit. Install a thermostat that operates in conjunction with the  installed accessories. See Figure 13 (page 13) for Heat / Cool applications

HEAT RISE DATA (BASED ON NOMINAL 10KW ELECTRIC HEAT KIT)

MODEL
P7RF-| BLOWER
SETTING| EXTERNAL STATIC PRESSURE DROP – INCHES WATER COLUMN
0.1| 0.2| 0.3| 0.4| 0.5| 0.6| 0.7| 0.8
CFM| HEAT
RISE| CFM| HEAT
RISE| CFM| HEAT
RISE| CFM| HEAT
RISE| CFM| HEAT
RISE| CFM| HEAT
RISE| CFM| HEAT
RISE| CFM| HEAT
RISE
X24K| Tap T1*| 467| 68| 443| 71| 417| 76| 343| 92| 272| 116| —| | | | |
| | | | |
Tap T2| 872| 36| 828| 38| 795| 40| 740| 43| 689| 46| 628| 50| 580| 54| 534| 59
Tap T3′| 1115| 28| 1079| 29| 1043| 30| 1006| 31| 964| 33| 916| 34| 866| 36| 819| 39
Tap T4| 1244| 25| 1207| 26| 1173| 27| 1136| 28| 1102| 29| 1064| 30| 1011| 31| 965| 33
Tap T5| 1496| 21| 1465| 22| 1437| 22| 1407| 22| 1370| 23| 1331| 24| 1295| 24| 1257| 25
X36K| Tap T1*| 900| 35| 865| 37| 818| 39| 767| 41| 696| 45| 646| 49| 592| 53| 547| 58
Tap T2′| 1131| 28| 1096| 29| 1058| 30| 1021| 31| 968| 33| 916| 34| 858| 37| 792| 40
Tap T3| 1344| 24| 1313| 24| 1270| 25| 1231| 26| 1197| 26| 1156| 27| 1106| 29| 1046| 30
Tap T4| 1507| 21| 1475| 21| 1441| 22| 1401| 23| 1362| 23| 1326| 24| 1281| 25| 1230| 26
Tap T5| 1602| 20| 1570| 20| 1533| 21| 1501| 21| 1463| 22| 1418| 22| 1383| 23| 1336| 24
X48K| Tap T1| 1062| 30| 1023| 31| 985| 32| 956| 33| 921| 34| 860| 37| 813| 39| 766| 41
Tap T2| 1079| 29| 1039| 30| 1006| 31| 969| 33| 927| 34| 870| 36| 842| 38| 777| 41
Tap T3| 1398| 23| 1356| 23| 1317| 24| 1277| 25| 1238| 26| 1200| 26| 1160| 27| 1115| 28
Tap T4*| 1654| 19| 1623| 19| 1572| 20| 1542| 20| 1509| 21| 1468| 22| 1428| 22| 1394| 23
Tap T5| 1982| 16| 1955| 16| 1921| 16| 1881| 17| 1851| 17| 1812| 17| 1782| 18| 1741| 18
X6OKA| Tap T1′| 1079| 29| 1039| 30| 1006| 31| 969| 33| 927| 34| 870| 36| 842| 38| 777| 41
Tap T2| 1238| 26| 1216| 26| 1181| 27| 1135| 28| 1099| 29| 1057| 30| 1023| 31| 964| 33
Tap T3| 1610| 20| 1582| 20| 1551| 20| 1514| 21| 1475| 21| 1449| 22| 1412| 22| 1372| 23
Tap T4| 1827| 17| 1794| 18| 1773| 18| 1741| 18| 1694| 19| 1657| 19| 1624| 19| 1583| 20
Tap T5| 2059| 15| 2026| 16| 1998| 16| 1960| 16| 1933| 16| 1901| 17| 1856| 17| 1827| 17

• Denotes factory set Low COOL speed
  ** Denotes factory set High COOL speed
  * Denotes factory set electric HEAT speed
  NOTE:** Temperature rises shaded grey are for reference only. These conditions are not recommended.

Table 3. CFM & Heat Rise Data

2 Stage Heat with Single Stage Heating Thermostat – If a single stage heat thermostat is used and 2 stage heat is desired, an optional outdoor thermostat may be installed. Connect the optional outdoor thermostat between the W1 (BROWN) connection and ORANGE wire in the outdoor unit. See Figure 13. Refer to the installation Instructions supplied with the outdoor thermostat for setup details.
Cooling Mode

1. On a call for cooling, the thermostat closes, and applies 24VAC to the G & Y1 terminals of the control. The compressor contactor closes and operates the compressor in 1st stage.
2. If the thermostat is not satisfied in the required time (based on the operation of the 2-stage cooling thermostat), Y2 will energize and the compressor will run at 2nd stage. Refer to the thermostat’s Installation Instructions for the  cooling profile.
3. When the thermostat is satisfied, the G & Y terminals on the control board de-energized and open the compressor contactor.

Electric Heat Package (optional)
This air conditioner is shipped without an auxiliary electric heat kit installed. If electric heat is desired, an accessory heater kit must be field installed.

• Select the correct size heat package for the installation. See specifications sheet for available kits and application. Install the heater kit according to the to the installation instructions provided with the kit.
• Installation is most easily accomplished before making duct or electrical connections.
• The blower must be set at the correct speed for the installed electric heat kit. For airflow data, refer to Table 3 and the installation instructions provided with the kit.

Blower Speed
For optimum system performance and comfort, it may be necessary to change the factory speed setting. See Table 3 for factory settings. NOTE: This model has a high efficiency ECM motor with 5 speed taps.

WARNING:
To avoid electric shock, personal injury, or death, turn off the electric power at the disconnect or the main service panel before making any electrical connections.
To Change the blower speed of the high efficiency motor:

1. Disconnect all electrical power to the unit and remove the service panel.
   CAUTION:
   Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing.

2. Locate the RED, BLUE and ORANGE wires terminated to the blower motor. The RED wire controls the low speed cooling and heating operations, the BLUE wire controls high speed cooling and heating operations, and the ORANGE wire controls the electric heating operation.

REFRIGERANT CHARGING
CAUTION:
Packaged AC units contain liquid and gaseous refrigerant under pressure. Adjustment of refrigerant charge should only be attempted by qualified, trained personnel thoroughly familiar with the equipment and safe responsible refrigerant handling procedures. Under no circumstances should the homeowner attempt to install and/or service this equipment. Failure to comply with this warning could result in equipment damage, personal injury, or death.

• To achieve rated capacity and efficiency the compressor must be exposed to refrigerant for at least 24 hours prior to running.
  After unit startup, 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.

Charging an R-410A Unit in AC Mode (with Outdoor Temperatures Above 55° F)

1. With the system operating in a steady-state, measure the liquid refrigerant pressure (in psig) at the service valve.
2. Measure the liquid refrigerant temperature (° F) at the service valve.
3. For the temperature measured, determine the required liquid refrigerant pressure from your units label or charging charts: Figure 8 (page 10), Figure 9 (page 10), Figure 10 (page 11), and Figure11 (page 11).
   • If the pressure measured in step 1 is greater than the required liquid refrigerant pressure determined in step 3, there is too much charge in the system. Remove refrigerant and repeat steps 1 – 3 until the system is correctly charged.
   • If the pressure measured in step 1 is less than the required liquid refrigerant pressure determined in step 3, there is too little charge in the system. Add refrigerant and repeat steps 1 – 3 until the system is correctly charged.

FIGURES & TABLES

Electrical Information

WIRING DIAGRAM

INSTALLATION CHECK LIST

INSTALLATION ADDRESS:

CITY:| STATE:
UNIT MODEL #:
UNIT SERIAL #:
Unit Installed Minimum clearances
per Figure 1 (page 3)?| YES| NO
INSTALLER NAME:
CITY:| STATE:

IMPORTANT – This product has been designed and manufactured to meet ENERGY STAR criteria for energy efficiency. However, proper refrigerant charge and proper air flow are critical to achieve rated capacity and efficiency. Installation of this product should follow the manufacturer’s refrigerant charging and air flow instructions. Failure to confirm proper charge and airflow may reduce energy efficiency and shorten equipment life.

ELECTRICAL SYSTEM

Rated Voltage (Volts):
L1-L2 Voltsage (Volts):
Has the thermostat been calibrated?| YES| NO
Is the thermostat level?| YES| NO
lsthe heat anticipatorsetting correct? (If Applicable)| YES| NO
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

REPLACEMENT PARTS
Replacement parts are available through your distributor. Please have the complete model and serial number of the unit when ordering replacement parts.

ELECTRICAL

MOTORS

COMPONENTS

Specifications & illustrations subject to change without notice or incurring obligations (01/22).
© Nortek Global HVAC LLC 2022. All Rights Reserved. 10413370
(Replaces 10401020)

References

• NFPA | The National Fire Protection Association

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