Ruud NAMP1 Series One-Piece PSC Air Handler Installation Guide

INSTALLATION INSTRUCTIONS
NAMP1 Series
One-Piece PSC Air Handler

NAMP1 Series One-Piece PSC Air Handler

This manual must be left with the homeowner for future reference.

This is a safety alert symbol and should never be ignored. When you see this symbol on labels or in manuals, be alert to the potential for personal injury or death.

WARNING
Improper installation, adjustment, alteration, service or maintenance can cause property damage, personal injury or loss of life. Installation and service must be performed by  a licensed professional HVAC installer or equivalent, service agency, or the gas supplier.

IMPORTANT
The Clean Air Act of 1990 bans the intentional venting of refrigerant (CFCs, HCFCs and HFCs) as of July 1, 1992. Approved methods of recovery, recycling or reclaiming  must be followed. Fines and/or incarceration may be levied for noncompliance.

CAUTION
As with any mechanical equipment, contact with sharp sheet metal edges can result in personal injury. Take care while handling this equipment and wear gloves and protective clothing.

Unit Dimensions – Upflow – Inches (mm)

NOTE: Unit is shipped configured for horizontal right-hand air discharge. Unit may be converted to horizontal left-hand air discharge by repositioning horizontal drain pan. Dimensions remain the same in all configurations.

Dimensions| 018| 024| 030| 036 / 042| 048| 060
---|---|---|---|---|---|---
in.| mm| in.| mm| in.| mm| in.| mm| in.| mm| in.| mm
A| 43-1/2| 1105| 45-1/2| 1156| 47| 1194| 53-5/8| 1362| 55| 1397| 59-3/4| 1518
B| 18-1/2| 470| 18-1/2| 470| 18-1/2| 470| 21-1/2| 546| 21-1/2| 546| 21-1/2| 546
C| 16-1/2| 419| 16-1/2| 419| 16-1/2| 419| 19-1/2| 495| 19-1/2| 495| 19-1/2| 495
D| 16-1/4| 413| 16-1/4| 413| 16-1/4| 413| 19-1/4| 489| 19-1/4| 489| 19-1/4| 489

Shipping and Packing List

Package 1 of 1 contains:
1 – Assembled air handler unit factory-equipped for upflow or horizontal air discharge application (includes upflow and horizontal drain pans and pre- installed air filter) Check the air handler for shipping damage; if found, immediately contact the last carrier. Check the unit rating plate to confirm that delivered unit matches order.

General
The NAMP1 series air handler with aluminum coil is designed for indoor installation only. As shipped, the unit is ready for installation in either upflow, horizontal lefthand or  right-hand air discharge applications. Electric heat, downflow air discharge kits, air filters and other accessories are available and listed in the NAMP1 Product Specification for ordering.
This instruction is intended as a general guide and does not supersede local or national codes in any way. Consult authorities having jurisdiction before installation.
NOTE: Special procedures are required for cleaning the aluminum coil in this unit. See Page 20 in this instruction for information.

Requirements

WARNING
Excessive Weight Hazard – Use two or more people when moving and installing the unit. Failure to do so can result in back or other type of injury.
IMPORTANT
NAMP1 units that include a factory-installed check/ expansion valve will provide optimal refrigerant control and system performance with outdoor units of varying capacities. These units must be installed as a part of a matched system as outlined in the NAMP1 Product Specification.

These instructions are intended as a general guide.
Compliance with all local, state, or national codes pertaining to this type of equipment should be determined prior to installation. Read this instruction manual, as well as the  instructions supplied in separate equipment, before starting the installation.
In addition to conforming to manufacturer’s installation instructions and local municipal building codes, installation of air handler units (with or without optional electric  heat), MUST conform with National Fire Protection Association (NFPA) standards: “Standard for Installation of Air Conditioning and Ventilation Systems” (NFPA No.  90A) and “Standard for Installation of Residence Type Warm Air Heating and Air Conditioning Systems” (NFPA No. 90B).
All models are designed for indoor installation only. The installation of the air handler, field wiring, duct system, etc. must conform to the requirements of the National  Electrical Code, ANSI/NFPA No. 70 (latest edition) in the United States, and any state laws, and local ordinances (including plumbing or waste water codes).
Local authorities having jurisdiction should be consulted before installation is made. Such applicable regulations or requirements take precedence over the general instructions  in this manual.
Install the conditioned air plenum, ducts and air filters (provided) in accordance with NFPA 90B Standard for the Installation of Warm Air Heating and Air-Conditioning Systems (latest edition).
The air handler is shipped from the factory completely assembled. The unit is provided with flanges for the connection of the duct system.
Do not remove the cabinet knockouts until it has been determined which knockouts will need to be removed for the installation.
Select the air discharge position which best suits the site conditions. Consider required clearances, space, routing requirements for refrigerant line, condensate disposal, filters,  duct system, wiring, and accessibility for service. Refer to the rating plate on the air handler for specific information.

WARNING
Danger of explosion. Keep flammable materials and vapors, such as gasoline, away from air handler. Place air handler so that heating elements are at least 18 inches (46 cm)  above the floor for a garage installation. Failure to follow these instructions can result in death, explosion, or fire.

IMPORTANT
Excessive condensation may occur if the unit is installed in a warm, humid place. When the unit is installed in an unconditioned space, apply sealant around electrical wires,  refrigerant piping and condensate lines at the point where they enter the cabinet.
Apply sealant on the inside of the cabinet at the point where the electrical wires exit through the conduit opening. This will also keep warm and moist unconditioned air out  of the air handler cabinet where it will form condensate on the cooler control box and electrical controls.

IMPORTANT
This unit is approved for installation clearance to combustible material as stated on the unit rating plate. Accessibility and service clearances must take precedence over  combustible material clearances.
The air handler must be installed so that free access is allowed to the coil/filter compartment and blower/control compartment.

• During cooling operation, excessive sweating may occur if the air handler is installed in a warm and humid space.
• If installed in an unconditioned space, sealant should be applied around the electrical wires, refrigerant tubing, and condensate lines where they enter the cabinet.
• Electrical wires should be sealed on the inside where they exit the conduit opening. Sealant is required to prevent air leakage into, and condensate from forming inside of,  the air handler, the control box, and on the electrical controls.

Use of Air Handler During Construction
Units may be used for heating (heat pumps) or cooling of buildings or structures under construction, if the following conditions are met to ensure proper operation.
DO NOT USE THE UNIT FOR CONSTRUCTION HEAT UNLESS ALL OF THE FOLLOWING CRITERIA ARE MET:

• A room thermostat must control the air handler. The use of fixed jumpers is not allowed.
• Air filter must be installed in the system and must be maintained during construction.
• Air filter must be replaced upon construction completion.
• The air handler evaporator coil, supply fan assembly and duct system must be thoroughly cleaned following final construction clean-up.
• All air handler operating conditions must be verified according to these installation instructions.

EQUIPMENT MAY EXPERIENCE PREMATURE COMPONENT FAILURE AS A RESULT OF FAILURE TO FOLLOW THE ABOVE INSTALLATION  NSTRUCTIONS. FAILURE TO FOLLOW THE ABOVE INSTALLATION INSTRUCTIONS VOIDS THE MANUFACTURER’S EQUIPMENT LIMITED WARRANTY. ALLIED AIR DISCLAIMS ALL LIABILITY IN CONNECTION WITH INSTALLER’S FAILURE TO FOLLOW THE ABOVE INSTALLATION INSTRUCTIONS.
NOTWITHSTANDING THE FOREGOING, INSTALLER IS RESPONSIBLE FOR CONFIRMING THAT THE USE OF CONSTRUCTION HEAT OR  OOLING  IS CONSISTENT WITH THE POLICIES AND CODES OF ALL REGULATING ENTITIES. ALL SUCH POLICIES AND CODES MUST BE ADHERED TO.

Installation Clearances

Non-Ducted Return Closet Installation
The air handler can be installed in a closet with a false bottom to form a return air plenum. It may also be installed with a return air plenum under the air handler.
Louvers or return air grilles are field-supplied. Local codes may limit application of systems without a ducted return to single-story buildings.
When a NAMP1 unit is installed in a closet with a louvered return opening, the minimum open area for the louvers will be:

• 320 square inches for -018 and -024 models;
• 360 square inches for -030 and -036 models;
• 450 square inches for -042 thru -060 models

If the free area is not known, assume a 25% free area for wood or a 75% free area for metal louvers or grilles. Using the louver dimensions and the 25% or 75% assumption, determine if the open area meets the minimum open area listed above.
If a return air plenum is used, the return air grille should be immediately in front of the opening in the plenum to allow for the free flow of return air. When not installed in  front of the opening, there must be adequate clearance around the air handler to allow for the free flow of return air.

Installation

Each unit consists of a blower assembly, refrigerant coil, and controls in an insulated galvanized steel factoryfinished enclosure. Knockouts are provided for electrical wiring entrance.

For ease in installation, it is best to make any necessary coil configuration changes before setting air handler in place.
Refrigerant Metering Device
NAMP1 units are equipped with a factory-installed check/expansion valve or an RFC device.
Upflow Application

1. The air handler must be supported on the bottom only and set on solid floor or field-supplied support frame. Securely attach the air handler to the floor or support frame.

2. If installing a unit in an upflow application, remove the horizontal drain pan.
   NOTE: The horizontal drain pan is not required in upflow air discharge installations; its removal provides the best efficiency and air flow.

3. Place the unit in the desired location and slope unit. Connect return and supply air plenums as required using sheet metal screws.

4. Install units that have no return air plenum on a stand that is at least 14” from the floor. This will allow proper air return.

Horizontal Applications

IMPORTANT
When removing the coil, there is a possibility of danger of equipment damage and personal injury. Be careful when removing the coil assembly from a unit installed in right-  or left-hand applications. The coil may tip into the drain pan once it is clear of the cabinet. Support the coil when removing it.

NOTE: When the unit is installed in horizontal applications, a secondary drain pan is recommended. Refer to local codes.
NOTE: This unit may be installed in left-hand or right-hand air discharge horizontal applications. Adequate support must be provided to ensure cabinet integrity. Ensure  that there is adequate room to remove service and access panels if installing in the horizontal position.

Right-Hand Discharge

1. Determine which plugs are required for drain line connections.

2. With access door removed, remove drain line plugs to install drain lines.

3. Set unit so that it is sloped toward the upflow drain pan end of the unit and level from front to back of unit (see Figure 6).

4.  The horizontal configuration is shown in Figure 2.
   Figure 2. Right-Hand Discharge Configuration

5. If the unit is suspended, the entire length of the cabinet must be supported. If you use a chain or strap, use a piece of angle iron or sheet metal attached to the unit (either  above or below) to support the length of the cabinet. Use securing screws no longer than 1/2 inch to avoid damaging the coil or filter. See Figure 3. Use sheet  metal screws to connect the return and supply air plenums as required.

Figure 3. Suspending Horizontal Unit

Left-Hand Air Discharge
For horizontal left-hand air discharge, the following field modifications are required.

Figure 4. Left-Hand Discharge Configuration

1. Remove access panels and the corrugated padding between the blower and coil assembly. Discard the corrugated padding.

2.  Pull the coil assembly from unit. Pull off the horizontal drain pan.

3. Remove the drain plugs from back drain holes on horizontal drain pan and reinstall them on front holes.
   **IMPORTANT**
   After removal of drain pan plug(s), check drain hole(s) to verify that drain opening is fully open and free of any debris. Also check to make sure that no debris has fallen  into the drain pan during installation that may plug up the drain opening.

4. Rotate drain pan 180º front-to-back and install it on the opposite side of the coil.

5. Remove screws from top cap. Remove drip shield screw located in the center of the back coil end seal as illustrated in Detail A in Figure 5.

6. Rotate drip shield 180° front-to-back.

7. Remove plastic plug from left hole on coil front end seal and reinstall plug in back hole. Reinstall drip shield screw in front coil end seal. Drip shield should drain  downward into horizontal drain pan inside coil.

8. Rotate top cap 180º front-to-back and align with unused screw holes. Holes must align with front and back coil end  plates (see Detail B in Figure 5). The top cap has a 45º bend on one side and a 90º bend on the other. The 90º bend must be on the same side as the horizontal drain pan  as illustrated in Detail A in Figure 5.
   NOTE: Be very careful when reinstalling the screws into the coil end plate engaging holes. Misaligned screws may damage the coil.

9. From the upflow position, flip cabinet 90º to the left and set into place. Replace blower assembly. Secure coil in place by bending down the tab on the cabinet support rail as illustrated.
   NOTE: Seal around the exiting drain pipe, liquid and suction lines to prevent infiltration of humid air.

10. Flip access door and replace it on the unit.

11. Set unit so that it is sloped 1/4ʺ toward the drain pan end of the unit. Connect return and supply air plenums as required using sheet metal screws.

12. If suspending the unit, it must be supported along the entire length of the cabinet. If using chain or strap, use a piece of angle iron or sheet metal attached to the unit  (either above or below) so that the full length of the cabinet is supported. Use securing screws no longer than 1/2ʺ to avoid damage to coil or filter, as illustrated in  Figure 3. Connect return and supply air plenums as required using sheet metal screws. Figure 5. Field Modification for Left-Hand Discharge

13. Set unit so that it is sloped 1/4ʺ toward the drain pan end of the unit. Connect return and supply air plenums as required using sheet metal screws.

14. If suspending the unit, it must be supported along the entire length of the cabinet. If using chain or strap, use a piece of angle iron or sheet metal attached to the unit  (either above or below) so that the full length of the cabinet is supported. Use securing screws no longer than 1/2ʺ to avoid damage to coil or filter, as illustrated in  Figure 3. Connect return and supply air plenums as required using sheet metal screws.

Downflow Application
If downflow application is required, separately order a downflow conversion kit and install per kit instructions. See Table 1 for kit information. Also use metal or class I supply and return air plenums.

Table 1. Downflow Conversion Kits

Units installed on combustible floors in the downflow position with electric heat require a downflow combustible flooring base. See Table 2 for kit information. Install per kit instructions.

Table 2. Downflow Combustible Floor Base Kits

IMPORTANT
If electric heat section with circuit breakers (ECBA25) is installed in a NAMP1 unit in a downflow application, the circuit breakers must be rotated 180° to the UP position.
See ECBA25 installation instructions for more details.

Condensate Drain

IMPORTANT
On units of this type, where the blower “draws” rather than “blows” air through the coil, traps must be installed in the condensate drain lines (primary and auxiliary, if used).  Traps prevent the blower from drawing air through the drain lines into the air supply.

IMPORTANT
A field-fabricated secondary drain pan, with a drain pipe to the outside of the building, is required in all installations over a finished living space or in any area that may be  damaged by overflow from the main drain pan. In some localities, local codes may require a secondary drain pan for any horizontal installation.

Sloping The Unit
Make sure the unit is sloped (similar to the slope shown in Figure 6) so that the drain pan will empty completely without water standing in the pan.

Figure 6. Sloping the Unit for Proper Drainage

Install Condensate Drain
The air handler is provided with 3/4” NPT condensate drain connections.

IMPORTANT
On some pans, the primary and secondary drain holes have knockouts.
Confirm primary and secondary drains are open.

1. NAMP1 units are equipped with a drain pan, which includes green (main drain) and red (secondary drain) plugs. Unscrew the plugs to remove them before inserting condensate drain fittings. Figure 7. Drain Line Connections

2. Install properly sized, field-provided connection fittings and connect primary drain line to the main drain pan connection.
   NOTE: When installing drain line connection fittings to the drain pan, hand tighten the fitting and use a thread sealant. Over-tightening the fittings can split connections on the drain pan.

3. If the secondary drain line is to be used, remove the plug or the knockout and route the drain line so that water draining from the outlet will be easily noticed by the  homeowner. Refer to local codes for drain trap requirements on the secondary drain line.

4.  Check again to ensure drain ports and drain pan are free of all debris.

5. Plug and check any unused drain pan openings for tightness. Torque plugs to 30 in. lb. to prevent water leaks or seepage from the drain pan.

6. Install a 2” trap in the main (primary) drain lines as close to the unit as practical (see Figure 8). Make sure the top of the trap is below the connection to the drain pan to allow complete drainage of the pan.
   NOTE: Horizontal runs must have an anti-siphon air  vent (standpipe) installed ahead of the horizontal run. See Figure 8. An extremely long horizontal run may require an oversized drain line to eliminate air traps.
   NOTE: Do not operate air handler without a trap in the main (primary) drain. The condensate drain is on the negative pressure side of the blower; therefore, air being  pulled through the condensate line will not allow positive drainage without a proper trap.

7. Route the drain line to the outside or to an appropriate drain. Drain lines must be installed so they do not block service access to the front of the air handler. A 24” clearance is required for filter, coil, or blower removal  and service access.
   NOTE: Check local codes before connecting the drain line to an existing drainage system. Insulate the drain lines where sweating could cause water damage.

Test Condensate Drain
Test the drain pan and drain line after installation:

1. Pour several quarts of water into drain pan. Use enough water to fill both the drain trap and the line.
2. Check the installed drain pan. Drain pan must be draining completely. Drain line fittings must not be leaking. Water must be draining from the end of the primary drain  line.
3. Correct any leaks found.

Figure 8. Typical Main and Overflow Drain

Duct System and Filters
Duct System
The air handler is provided with flanges for the connection of the supply plenum.
Supply and return duct system must be adequately sized to meet the system’s air requirements and static pressure capabilities. The duct system should be insulated with a  minimum of 1” thick insulation with a vapor barrier in conditioned areas or 2” minimum in unconditioned areas. Supply plenum should be the same size as the flanged opening provided around the blower outlet and should  extend at least 3 ft. from the air handler before turning or branching off plenum into duct runs. The plenum forms an extension of the blower housing and minimizes air expansion losses from the blower.
Filters
A filter is provided. Table 3 lists the filter size for each unit.

Table 3. Unit Air Filter Size Chart

IMPORTANT
If a high efficiency filter is being installed as part of this system to ensure better indoor air quality, the filter must be properly sized. High efficiency filters have a higher static  pressure drop than standard efficiency glass/foam filters. If the pressure drop is too great, system capacity and performance may be reduced. The pressure drop may also  cause the limit to trip more frequently during the winter and the indoor coil to freeze in the summer, resulting in an increase in the number of service calls. Before using any  filter with this system, check the specifications provided by the filter manufacturer against the data given in the appropriate Product Specifications. Additional information is  provided in Service and Application Note ACC002 (August 2000).

Installing Duct System
Connect supply air duct to the flange on top of the air handler. If an isolation connector is used, it must be nonflammable.

Field-Fabricated Return Air Duct Flange for Horizontal Applications
A return air duct system is recommended, but not factoryprovided.
If the unit is installed in a confined space or closet, run a full-size return connection to a location outside the closet.Figure 9. Cabinet and Duct Flange

Figure 9. Cabinet and Duct Flange

Brazing Refrigerant Lines

Refrigerant lines must be connected by a qualified technician in accordance with established procedures.

IMPORTANT
Refrigerant lines must be clean, dry, refrigerant-grade copper lines. Air handler coils should be installed only with specified line sizes for approved system combinations.
Handle the refrigerant lines gently during the installation process. Sharp bends or kinks in the lines will cause a restriction.
Do not remove the caps from the lines or system connection points until connections are ready to be completed.

PLEASE READ IMPORTANT ISSUES CONCERNING BRAZING OPERATIONS IN THE BRAZING REFRIGERANT LINES SECTION BEFORE PROCEEDING.
NOTE – Refer to outdoor unit installation instructions for refrigerant piping size requirements.
NOTE – Use silver alloy brazing rods with five or six percent minimum silver alloy for copper-to-copper brazing; 45 percent alloy for copper-to- brass and copper-to-steel  brazing. Do not use soft solder.

A REMOVE ACCESS PANEL
B ROUTE SUCTION AND LIQUID LINES FROM FITTINGS ON INDOOR COIL TO FITTINGS ON OUTDOOR UNIT. RUN LINES IN DIRECT PATH,  AVOIDING UNNECESSARY TURNS AND BENDS.
NOTE – MAKE SURE SUCTION LINE IS INSULATED OVER ENTIRE EXPOSED LENGTH AND NEITHER SUCTION NOR LIQUID LINES ARE IN  DIRECT CONTACT WITH FLOORS, WALLS, DUCT SYSTEM, FLOOR JOISTS, OR OTHER PIPING.

Figure 10. Brazing Connections

C REMOVE RUBBER PLUG FROM BOTH LIQUID AND SUCTION LINES
NOTE – NAMP1TA SERIES UNITS USE NITROGEN OR DRY AIR AS A HOLDING CHARGE. IF THERE IS NO PRESSURE WHEN THE RUBBER PLUGS  ARE REMOVED, CHECK THE COIL FOR LEAKS BEFORE INSTALLING.
D EITHER REMOVE OR PUSH PIPE WRAPPING BACK THROUGH HOLE IN PIPING PLATE BEFORE LINE SET CONNECTION AND BRAZING.
E CONNECT PIPES
NOTE – REFRIGERANT LINE SETS SHOULD BE ROUTED TO ALLOW FILTER ACCESSIBILITY.

G PLACE A WET RAG AGAINST PIPING PLATE AND AROUND THE SUCTION LINE CONNECTION.
H BRAZE CONNECTION. ALLOW PIPE TO COOL
TO ROOM TEMPERATURE BEFORE REMOVINGWET RAG FROM CTXV SENSING BULB AND PIPING PANEL AREA.
I REPEAT PREVIOUS PROCEDURE FOR LIQUID LINE.
J REINSTALL RUBBER GROMMETS INTO THE REFRIGERANT PIPING PANEL.
NOTE – MAKE SURE EXPANSION VALVE CAPILLARY TUBE IS NOT TOUCHING METAL EDGES OR COPPER TUBING.

NOTE – Refer to instructions provided with outdoor unit for leak testing, evacuating and charging procedures.

WARNING
Polyol ester (POE) oils used with HFC-410A refrigerant absorb moisture very quickly. It is very important that the refrigerant system be kept closed as much as possible.
DO NOT remove line set caps or service valve stub caps until you are ready to make connections.
WARNING
**** Before brazing, ensure the system is fully recovered of all refrigerant. Application of a brazing torch to a pressurized system may result in ignition of the refrigerant and oil  mixture. Check the high and low pressures before applying heat.

WARNING
To prevent the build-up of high levels of nitrogen when purging, it must be done in a well-ventilated area. Purge low-pressure nitrogen (1 to 2 psig, 6.9 to 13.8 kPa) through  the refrigerant piping during brazing. This will help to prevent oxidation and the introduction of moisture into the system.

CAUTION
Brazing alloys and flux contain materials which are hazardous to your health.
Avoid breathing vapors or fumes from brazing operations. Perform operations only in well-ventilated areas.
Wear gloves and protective goggles or face shield to protect against burns.
Wash hands with soap and water after handling brazing alloys and flux.

NOTE
Recommended line length is 50’ or less. If more than 50’ line set is required, contact GE Appliances.

Sealing the Unit

Seal the unit so that warm air is not allowed into the cabinet. Warm air introduces moisture, which results in water blowoff problems. This is especially important when the  unit is installed in an unconditioned area.
If installed in an unconditioned space, sealant should be applied around the electrical wires, refrigerant tubing, and condensate lines where they enter the cabinet.

WARNING
There must be an airtight seal between the bottom of the air handler and the return air plenum. Use fiberglass sealing strips, caulking, or equivalent sealing method between  the plenum and the air handler cabinet to ensure a tight seal. Return air must not be drawn from a room where this air handler or any gas-fueled appliance (i.e., water heater),  or carbon monoxide-producing device (i.e., wood fireplace) is installed.

IMPORTANT
Use duct tape and/ or Permagum to seal closed anyspace around the holes where the drain lines exit the cabinet. Warm air must not be allowed to enter through any gaps or holes in the cabinet.

Electrical Connections

WARNING
Electric shock hazard! – Disconnect all power supplies before servicing.
Replace all parts and panels before operating.
Failure to do so can result in death or electrical shock.

WARNING
Run 24V Class II wiring only through specified low voltage opening. Run line voltage wiring only through specified high voltage opening. Do not combine voltage in one opening.

WARNING
**** Electric Shock Hazard. Can cause injury or death. Unit must be properly grounded in accordance with national and local codes. Line voltage is present at all components  hen  unit is not in operation on units with singlepole contactors. Disconnect all remote electric power supplies before opening access panel. Unit may have multiple power supplies.

• Wiring must conform to the current National Electric Code, ANSI/NFPA No. 70, or Canadian Electric Code Part I, CSA Standard C22.1, and local building codes.
  Refer to following wiring diagrams. See unit nameplate for minimum circuit ampacity and maximum overcurrent protection size.

• Electrical wiring, disconnect means and over-current protection are to be supplied by the installer. Refer to the air handler rating plate for maximum overcurrent protection, minimum circuit ampacity, as well as operating voltage. Select the proper supply circuit conductors in accordance with tables 310-16 and 31017 in the National Electric Code, ANSI/NFPA No. 70 or tables 1 through 4 in the Canadian Electric Code, Part I, CSA Standard C22.1.

• The power supply must be sized and protected according to the specifications supplied on the product.

• This air handler is factory-configured for 240 volt, single phase, 60 cycles. For 208-volt applications, see “208 Volt Conversion” later in this section.

• Separate openings have been provided for 24V low voltage and line voltage. Refer to the dimension illustration of specific location.

• This unit is provided with holes for conduit. Use provided caps to seal holes not used.

• Typical unit wiring (as well as wiring of optional fieldinstalled electric heat) is given in Figure 16. Refer to the instructions provided with the electric heat section for  roper installation.

WARNING
USE COPPER CONDUCTORS ONLY

1. Disconnect all power supplies.
2. Remove the air handler access panel.
3. Route the field supply wires to the air handler electrical connection box.
4. Use UL-listed wire nuts to connect the field supply conductors to the unit black and yellow leads, and the ground wire to ground terminal marked GND.
5. Replace the air handler access panel.

Figure 11. Electrical Connections
(Upflow Configuration)

Control Panel Relocation
To avoid the possibility of moisture damage to the control in some left-hand discharge configurations, the control panel can be relocated to the end panel as shown in Figure  13.

1. Remove the two screws that secure the control panel to the cabinet. Slide panel out.
2. Slide the control panel into the notch on the electric heat mounting panel (Figure 12). Using the screws removed in Step 1, secure the control panel to the end panel.

Figure 12. Notch for Control Panel Relocation

Figure 13. Control Panel Relocated to End Panel (Horizontal-Left Configuration)

208 Volt Conversion

1. Disconnect all power supplies.
2. Remove the air handler access panel.
3. Using the wiring diagram located on the unit access panel as a reference, move the 2 connected black transformer leads from the 240 volt terminal on the transformer to the 208 volt terminal on the transformer.

WARNING
**** Electrically ground air handler. Connect ground wire to ground terminal marked “GND”. Failure to do so can result in death or electrical shock.

Figure 14. Converting Unit from 240VAC to 208VAC

Figure 15. Thermostat Designations – Non-Communicating

Refer to thermostat installation instructions
If applicable
Refer to indoor unit installation instructions
“L” is used for any accessories (e.g. diagnostic /warning / alarm), used to activate thermostat warning light
NOTES:  W / W1 / W2 / W3 are auxiliary heat (supplemental to heat pump).
“E” is emergency heat (disables heat pump).

Figure 16. Typical Wiring Diagram – NAMP1 Air Handler with Electric Heat – PSC (018, 024, 030, 036, 042 models)

Figure 17. Typical Wiring Diagram – NAMP1 Air Handler with Electric Heat – CT (048 and 060 models)

Air Flow – Cooling Blower Speed

The cooling blower speed is factory configured to provide correct air flow for an outdoor unit that matches the cooling capacity rating of the air handler.
If the outdoor unit is smaller than the maximum cooling capacity rating for the air handler, the cooling blower speed may need to be changed. Refer to blower performance chart in Table 4.

WARNING
**** Electric shock hazard! – Disconnect all power supplies before servicing.
Replace all parts and panels before operating.
Failure to do so can result in death or electrical shock.

Change Blower Speed

1. Disconnect all power supplies.

2. Remove the air handler access panel.

3. Locate pin number 2 on the blower relay. Two black wires are connected to this terminal pin. One connects to pin number 5 on the blower relay, one connects to an in-line splice connecting to a blue wire.

4. Select the required blower motor speed. Connect redLO or black-HI and plug it into the 4-pin blower relay harness connector.
   NOTE: Reuse the factory-installed rubber wire cap on the unused wires.

5. Replace all panels.

6. Reconnect power.
   NOTE: To change blower speed on Constant Torque -048 and -060 units, remove the wire from terminal Y1 on the strip and install on either of the speeds not being  used (Brown TAP 2 or Black TAP 5).

BLOWER RELAY

NOTE – Refer to wiring diagram located on the unit access panel, this figure and blower perform-ance (table 2).

• All air data measured external to unit with 1 inch non-pleated air filter in place.
• All factory settings are medium speed.
• All data given while air handler is operating with a dry DX evaporator coil.
• All downflow applications run on high speed when utilizing electric heat.

Figure 18. Changing Blower Speed

Air Handler Model| Blower Speed| .10 ” WC| .20 ” WC| .30 ” WC| .40 ” WC| .50 ” WC
---|---|---|---|---|---|---
-018| LOW| 538| 525| 503| 471| 418
MED| 688| 670| 639| 603| 548
HIGH| 919| 881| 855| 788| 710
-024| LOW| 677| 673| 657| 629| 592
MED| 1011| 979| 942| 803| 742
HIGH| 1106| 1045| 999| 917| 857
-030| LOW| 871| 870| 853| 812| 769
MED| 1078| 1057| 1024| 987| 936
HIGH| 1311| 1261| 1214| 1154| 1086
-036| LOW| 1020| 972| 956| 909| 806
MED| 1276| 1240| 1191| 1148| 1086
HIGH| 1559| 1521| 1446| 1395| 1327
-042| LOW| 1300| 1273| 1250| 1211| 1155
MED| 1527| 1493| 1452| 1390| 1345
HIGH| 1816| 1756| 1693| 1605| 1528

-048

| LOW| 1257| 1212| 1157| 1116| 1053
MED LOW| 1486| 1448| 1411| 1364| 1330
MED| 1721| 1675| 1630| 1594| 1553
MED HIGH| 1721| 1675| 1630| 1594| 1553
HIGH| 1840| 1794| 1754| 1721| 1681
-060| LOW| 1098| 1049| 1001| 926| 831
MED LOW| 1624| 1594| 1565| 1520| 1492
MED| 1815| 1783| 1758| 1730| 1685
MED HIGH| 1903| 1869| 1837| 1809| 1764
HIGH| 1981| 1957| 1923| 1893| 1861
Blower Performance (CFM vs. ESP in. w.c.)
•  Cooling speeds should not be reduced below factory setting.
•  All units with electric heat approved at 0.5” maximum and medium blower speed minimum.
•  All downflow applications run on high speed when utilizing electric heat.

Table 4. NAMP1 Blower Performance (3-Speed PSC) – 240V (CFM @ ESP. – in. W. C.)

Checkout Procedures

NOTE: Refer to outdoor unit installation instructions for system start-up instructions and refrigerant charging instructions.

Pre-Start-Up Checks

• Is the air handler properly and securely installed?
• If horizontally configured, is the unit sloped up to 5/8 inch toward drain lines?
• Will the unit be accessible for servicing?
• Has an auxiliary pan been provided under the unit with separate drain for units installed above a finished ceiling or in any installation where condensate overflow could cause damage?
• Have ALL unused drain pan ports been properly plugged?
• Has the condensate line been properly sized, run, trapped, pitched, and tested?
• Is the duct system correctly sized, run, sealed, and insulated?
• Have all cabinet openings and wiring been sealed?
• Is the indoor coil factory-installed TXV or RFC properly sized for the outdoor unit being used?
• Have all unused parts and packaging been disposed of?
• Is the filter clean, in place, and of adequate size?
• Is the wiring neat, correct, and in accordance with the wiring diagram?
• Is the unit properly grounded and protected (fused)?
• Is the thermostat correctly wired and in a good location?
• Are all access panels in place and secure?

Check Blower Operation

1. Set thermostat to FAN ON. The indoor blower should come on.

Check Cooling Operation

1.  Set thermostat to force a call for cooling (approximately 5ºF lower than the indoor ambient temperature).
2. The outdoor unit should come on immediately and the indoor blower should start between 30 – 60 seconds later.
3. Check the air flow from a register to confirm that the system is moving cooled air.
4. Set the thermostat 5ºF higher than the indoor temperature. The indoor blower and outdoor unit should cycle off.

Check Electric Heat (If Used)

1. Set thermostat to call for auxiliary heat (approximately 5°F above ambient temperature). The indoor blower and auxiliary heat should come on together. Allow a minimum of 3 minutes for all sequencers to cycle on.
2. Set the thermostat so that it does not call for heat. Allow up to 5 minutes for all sequencers to cycle off.

Operation

Time Delay Relay
Blower time delay operation:

1. When cooling demand is initiated, there is a 1 second motor-on delay.
2. After the motor-on delay expires, motor ramps up to 100% and runs at 100% until cooling demand is satisfied.
3. Once demand is met, motor runs at 100% for 45 seconds.
4. Motor ramps down to stop.

Cooling (Cooling Only or Heat Pump)
When the thermostat calls for cooling, 24 volts is put on the blower time- delay relay coil and then the indoor blower relay energizes. The normally open contacts close,  causing the indoor blower motor to operate. The circuit between R and Y is completed, closing the circuit to the contactor in the outdoor unit, starting the compressor and  outdoor fan motor.
On heat pumps, circuit R and O energizes the reversing valve, switching the valve to the cooling position. (The reversing valve remains energized as long as the thermostat  selector switch is in the COOL position.)
At the completion of the cooling demand the indoor blower and outdoor unit should cycle off. Air handler should cycle off 45 seconds after the outdoor unit shuts off.
Heating (Electric Heat Only)
When the thermostat calls for heat, the circuit between R and W is completed, and the heat sequencer is energized. A time delay follows before the heating elements and the indoor blower motor come on. Units with a second heat sequencer can be connected with the first sequencer to W on the thermostat sub-base, or they may also be  connected to a second stage on the sub-base.

Heating (Heat Pump)
When the thermostat calls for heating, 24 volts is applied to the blower time- delay relay coil. Then, normally open contacts close, causing the indoor blower motor to operate.  The circuit between R and Y is completed, closing the circuit to the contactor in the outdoor unit, starting the compressor and outdoor fan motor.
If the room temperature continues to decrease, the circuit between R and W1 is completed by the second-stage heat room thermostat. Circuit R-W1 energizes a heat  equencer. The completed circuit will energize supplemental electric heat (if applicable). Units with a second heat sequencer can be connected with the first sequencer to W1  on the thermostat. They may also be connected to a second heating stage W2 on the thermostat sub-base.

Emergency Heat (Heating Heat Pump)

If the room temperature continues to decrease, the circuit between R and W1 is completed by the second-stage heat room thermostat. Circuit R-W1 energizes a heat  equencer. The completed circuit will energize supplemental electric heat (if applicable). Units with a second heat sequencer can be connected with the first sequencer to W1  on the thermostat. They may also be connected to a second heating stage W2 on the thermostat sub-base.

Repairing or Replacing Cabinet Insulation

IMPORTANT
DAMAGED INSULATION MUST BE REPAIRED OR REPLACED before the unit is put back into operation. Insulation loses its insulating value when wet, damaged, separated or torn.

Matte- or foil-faced insulation is installed in indoor equipment to provide a barrier between outside air conditions (surrounding ambient temperature and humidity) and the  varying conditions inside the unit. If the insulation barrier is damaged (wet, ripped, torn or separated from the cabinet walls), the surrounding ambient air will affect the inside surface temperature of the cabinet.
The temperature/humidity difference between the inside and outside of the cabinet can cause condensation on the inside or outside of the cabinet which leads to sheet metal
corrosion and, subsequently, component failure.

Repairing Damaged Insulation
Areas of condensation on the cabinet surface are an indication that the insulation is in need of repair.
If the insulation in need of repair is otherwise in good condition, the insulation should be cut in an X pattern, peeled open, glued with an appropriate all-purpose glue and  placed back against the cabinet surface, being careful to not overly compress the insulation so the insulation can retain its original thickness. If such repair is not possible, replace the insulation. If using foil-faced insulation, any cut, tear, or separations in the insulation surface must be taped with a similar foil-faced tape.

Figure 20. Repairing Insulation

Professional Maintenance

NOTICE
Failure to follow instructions will cause damage to the unit.
This unit is equipped with an aluminum coil. Aluminum coils may be damaged by exposure to solutions with a pH below 5 or above 9. The aluminum coil should be cleaned  using potable water at a moderate pressure (less than 50psi). If the coil cannot be cleaned using water alone, it is recommended to use a coil cleaner with a pH in the range of  5 to 9. The coil must be rinsed thoroughly after cleaning.
In coastal areas, the coil should be cleaned with potable water several times per year to avoid corrosive buildup (salt).

Homeowner Maintenance

IMPORTANT
Do not operate system without a filter. A filter is required to protect the coil, blower, and internal parts from excessive dirt and dust. The filter is placed in the return duct by the installer.

• Inspect air filters at least once a month and replace or clean as required. Dirty filters are the most common cause of inadequate heating or cooling performance.
• Replace disposable filters. Cleanable filters can be cleaned by soaking in mild detergent and rinsing with cold water.
• Install new/clean filters with the arrows on the side pointing in the direction of air flow. Do not replace a cleanable (high velocity) filter with a disposable (low velocity)  filter unless return air system is properly sized for it.
• If water should start coming from the secondary drain line, a problem exists which should be investigated and corrected. Contact a qualified service technician.

Figure 21. Start-Up and Performance Checklist (Upflow Configuration)

Figure 22. Start-Up and Performance Checklist (Horizontal Configuration)

Issue 2135
507787-01G / 31-5000675
GE Appliances
A Haier Company
Appliance Park
Louisville, KY 40225

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