GE APPLIANCES NP14X60S072 Gas Packaged Unit Installation Guide

GE APPLIANCES NP14X60S072 Gas Packaged Unit

Product Specifications:

• Model: NP14XS Series
• Type: Residential Packaged Units
• Fuel Type: Gas/Electric
• NOx Emission: Ultra Low

Installation Instructions:
Before installing the NP14XS Series unit, carefully read and follow the instructions provided in this manual. Improper installation can cause injury or property damage.

Unit Dimensions – Small Base Gas/Electric:

• Top View: 2.33 inches x 11.49 inches
• Side Views: 47.66 inches x 1.98 inches x 16.77 inches
• Bottom Power Entry: 3.25 inches x 20.31 inches x 21.06 inches x 23.19 inches
• Gas Entry: 13.44 inches x 13.44 inches
• Horizontal Supply Air: 5.86 inches x 6.00 inches
• Horizontal Return Air: 5.75 inches x 2.88 inches

Unit Dimensions – Large Base Gas/Electric:

• Top View: 2.33 inches x 11.49 inches
• Side Views: 47.66 inches x 2.11 inches x 2.39 inches
• Bottom Power Entry: 3.87 inches x 3.62 inches x 36.20 inches
• Gas Entry: 18.19 inches x 18.19 inches
• Horizontal Supply Air: 3.76 inches
• Horizontal Return Air: 4.20 inches

Maintenance Instructions:
Regular maintenance of the NP14XS Series unit is essential for optimal performance and longevity. Refer to the manual for maintenance schedules and procedures.

Frequently Asked Questions

Q: What should I do if I encounter a gas leak?

A: In case of a gas leak, immediately evacuate the area and contact emergency services.

Q: How often should I replace the filters?

A: Filters should be checked monthly and replaced every 3 to 6 months, depending on usage.

Q: Can I install the unit myself?

A: It is recommended to consult a licensed professional or HVAC installer for installation to ensure safety and proper functioning.

WARNING

• Improper installation, adjustment, alteration, service, or maintenance can cause injury or property damage. Refer to this manual. For assistance or additional information, consult a licensed professional (or equivalent), HVAC installer, service agency, or gas supplier.
• Do not store combustible materials, including gasoline and other flammable vapors and liquids, near the unit, vent pipe, or warm air ducts. Such actions could cause property damage, personal injury, or death.

CAUTION
The installation of the unit, wiring, warm air ducts, venting, etc. must conform to the requirements of the National Fire Protection Association; the National Fuel Gas Code, ANSI Z223.1 (latest edition) and the National Electrical Code, ANSI/NFPA No. 70 (latest edition) in the United States; the Canadian Installation Codes CAN/CGA-B149.1 & .2 (latest edition) and the Canadian Electrical Code Part 1, CSA 22.1 (latest edition) in Canada; and any state or provincial laws, local ordinances, or local gas utility requirements. 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.

Unit Dimensions

Small Base Gas/Electric

Roof Curb Dimensions

Small Base Gas/Electric

NOTE
If bottom entry is used, condensate from the heat exchanger may leak during warm ambient temperatures in humid climates. Ensure that the bottom entry is watertight if used.

NOTE
If bottom entry is used, condensate from the heat exchanger may leak during warm ambient temperatures in humid climates. Ensure that the bottom entry is watertight if used.

Adjustable Roof Curb Dimensions

Small Base Gas/Electric (Knock-Down Style)

NOTE
If bottom entry is used, condensate from the heat exchanger may leak during warm ambient temperatures in humid climates. Ensure that the bottom entry is watertight if used.

Large Base Gas/Electric (Knock-Down Style)

NOTE
If bottom entry is used, condensate from the heat exchanger may leak during warm ambient temperatures in humid climates. Ensure that the bottom entry is watertight if used.

Adjustable Roof Curb Dimensions (Welded Style)

Installation

• These instructions must be saved for future reference.
• These units are single-package air conditioners with gas heat designed for outdoor installation on a rooftop or a slab.
• The units are completely assembled. All piping, refrigerant charge, and electrical wiring are factory-installed and tested. The units require only electric power, gas piping, condensate drain, and duct connections, plus installation of the vent cover at the point of installation.
• If components are to be added to a unit to meet local codes, they are to be installed at the dealer’s and/or customer’s expense.
• The size of the unit for the proposed installation should be based on heat loss/heat gain calculation made according to the methods of Air Conditioning Contractors of America (ACCA).

WARNING

In the State of Massachusetts:
This product must be installed by a licensed Plumber or Gas Fitter. When flexible connectors are used, the maximum length shall not exceed 36″. When lever-type gas shutoffs are used, they shall be T-handle type.

These installation instructions are intended as a general guide only, for use by an experienced, qualified contractor.

These units are certified by E.T.L. Testing Laboratories, Inc.:

• For use as a forced air furnace with a cooling unit.
• For outdoor installation only.
• For installation on combustible material.
• For use with natural gas

These units are not suitable for use with conventional venting systems.

Inspection
As soon as the unit is received, it should be inspected for possible damage during transit. If damage is evident, the extent of the damage should be noted on the carrier’s freight bill. A separate request for inspection by the carrier’s agent should be made in writing.

Location
Use the following guidelines to select a suitable location for these units.

1. The unit is designed for outdoor installation only. The unit must be installed so all electrical components are protected from water.

2. Condenser coils must have an unlimited supply of air.

3. For ground-level installation, use a level prefabricated pad or a level concrete slab. Do not tie the slab to the building foundation.

4. Maintain level within a tolerance of 1/4” maximum across the entire length or width of the unit.
   CAUTION
   Unit levelness is critical for proper float switch operation.

5. Do not locate the unit where the combustion air supply will be exposed to any of the following substances:

   • Permanent wave solutions
   • Chlorinated waxes and cleaners
   • Chlorine-based swimming pool chemicals
   • Water softening chemicals
   • Deicing salts or chemicals
   • Carbon tetrachloride
   • Halogen-type refrigerants
   • Cleaning solvents (such as perchloroethylene)
   • Printing inks, paint removers, varnishes, etc.
   • Cement and glues
   • Antistatic fabric softeners for clothes dryers
   • Masonry acid-washing materials
   • Chlorinated laundry products
   • Hydrochloric acid

Use of Unit During Construction
Use of this unit as a construction heater or air conditioner is not recommended during any phase of construction. Very low return air temperatures, harmful vapors, and the operation of the unit with clogged or misplaced filters will damage the unit.

If this unit has been used for heating or cooling of buildings or structures under construction, the following conditions must be met or the warranty will be void:

• A room thermostat must control the unit. The use of fixed jumpers that will provide continuous heating or cooling is not allowed.
• A pre-filter must be installed at the entry to the return air duct.
• MERV 11 or greater air filters must be installed in the system and must be regularly inspected and maintained (e.g., regular static checks and replacement at the end of life during construction.
• The return air duct must be provided and sealed to the unit.
• Return air temperature range between 55°F (13°C) and 80°F (27°C) must be maintained.
• Air filters must be replaced and pre-filters must be removed upon construction completion.
• The input rate and temperature rise must be set per the unit rating plate.
• The heat exchanger, components, duct system, air filters, and evaporator coil must be thoroughly cleaned following final construction clean-up.
• The unit operating conditions including airflow, cooling operation, ignition, input rate, temperature rise, and venting) must be verified according to these installation instructions.

Clearances

• All units require certain clearances for proper operation and service. Refer to Table 1 for the minimum clearances to combustibles, servicing, and proper unit operation. In the U.S., units may be installed on combustible floors made from wood or class A, B, or C roof covering material.
• In Canada, units may be installed on combustible floors.
• Units must be installed outdoors.
• Clearance to combustibles below the unit flue is 10 inches since the flue points down.

Do not permit overhanging structures or shrubs to obstruct condenser air discharge outlets, combustion air inlets, or vent outlets.

| Clearance to Combustibles| Clearance for Service Access
---|---|---
Front of unit| 0 in.| 24 in.
Back of unit| 0 in.| 0 in.
Left side| 0 in.| 24 in.
Right side (from vent hood)| 12 in.| 24 in.
Base of unit| 0 in.| 0 in.
Top of unit| 0 in.| 48 in.
The minimum clearance to combustible material below the flue is 10 inches to allow proper dissipation of flue gasses and temperatures. For any future service, the installer must provide access to the screws of the top and rear panels.

Table 1. Minimum Clearances

Roof Curb Installation

• If a roof curb is used, follow the manufacturer’s installation instructions and be sure that all required clearances are observed (see Clearances section).
• Before setting the unit on the roof curb, the shipping bracket located underneath the unit must be removed.

Rigging Unit
Exercise care when moving the unit. Do not remove any packaging until the unit is near the place of installation.

1. Connect rigging to the unit base rails using both holes in each corner.
2. All panels must be in place for rigging.
3. Place field-provided spreaders in place. Spreaders must be of adequate strength and length (must exceed unit dimension by 6 inches).

Units may also be moved or lifted with a forklift. The lengths of the forks of the forklift must be a minimum of 42 inches.

CAUTION
Before lifting a unit, make sure that the weight is distributed equally on the cables so that it will lift evenly.

Unpacking

NOTE:
Some units will be packaged with stacking brackets while other units will be packaged on a pallet.

1. For units packaged with stacking brackets: Locate the four stacking brackets at each corner of the top panel. Remove the screws that secure these brackets. All screws must be re-installed. The stacking brackets can be discarded.
2. For units packaged on a pallet: Remove the unit from the skid.
3. Remove the bag and remaining packaging material, which can be discarded.
4. Locate the four plastic fork slot bumpers on the base rails. Remove the fasteners and bumpers and discard them.

Service Access
Access to all serviceable components is provided by four removable panels: upper access panel (for blower, ID coil, and optional filter), heat exchanger access, control access panel, and compressor access.

CAUTION
As with any Mechanical equipment, personal injury can result from contact with sharp sheet metal edges. Be careful when you handle this equipment.

WARNING
This unit is charged with HFC-410A refrigerant. Operating pressures for units charged with HFC-410A are higher than pressures in units charged with HCFC-22. All service equipment MUST be rated for use with HFC-410A refrigerant.

Venting

• The vent outlet must be installed in a location to prevent building degradation and must be consistent with the National Fuel Gas Code, 2223.1 or CAN/CGA-B149.1 &.2.
• The products of combustion are discharged through a screened opening on the gas heat side panel. The horizontal vent system shall terminate at least 4 feet below, 4 feet horizontally from, or 1 foot above any door, window, or gravity air inlet into the building. The vent system shall terminate at least 3 feet above any forced air inlet located within 10 feet.
• The unit shall be installed in a manner such that snow accumulation will not restrict the flow of flue products.
• Minimum horizontal clearance of 4 feet from electric meters, gas meters, regulators, and relief equipment is required.
• In addition to the above requirements, consideration must be given to prevent unwanted ice buildup from the vent condensate. The vent should not be located on the side of a building where the prevailing winter winds could trap the moisture, causing it to freeze on the walls or overhangs (under eaves). The vent should not be located over a sidewalk, patio, or other walkway where the condensate could cause the surface to become slippery.

The products of combustion must not be allowed to accumulate within a confined space where they may be recirculated.

Vent Hood Installation
The unit is shipped with the vent hood inside the return air compartment. Locate the vent hood and attach it to the side of the utility panel with screws provided in the instruction bag (see Figure 1).

NOTE:
If an existing gas furnace is being removed from a common venting system when this packaged unit is installed, then read and follow the instructions in the “Removal of Unit from Common Venting System” section that follows. Otherwise, you may skip this section.

Removal of Unit from Common Venting System
When an existing furnace is removed from a common venting system serving other appliances, the venting system is likely to be too large to properly vent the remaining attached appliances. The following test should be conducted with each appliance while the other appliances connected to the common venting system are not in operation.

1. Seal any unused openings in the common venting system.
2. Visually inspect the venting system for proper size and horizontal pitch and determine there is no blockage or restriction, leakage, corrosion, or other deficiencies that could cause an unsafe condition.
3. Insofar as is practical, close all building doors and windows between the space in which the appliances remaining connected to the common venting system are located and other spaces in the building. Turn on clothes dryers and any appliances not connected to the common venting system. Turn on exhaust fans, such as range hoods and bathroom exhausts, so they will operate at maximum speed. Do not operate a summer exhaust fan. Close fireplace dampers.
4. Following the lighting instructions, place the unit being inspected in operation. Adjust the thermostat so the appliance will operate continuously.
5. Test for spillage at the draft control relief opening after 5 minutes of main burner operation. Use the flame of a match or candle.
6. Follow the preceding steps for each appliance connected to the common venting system.
7. After it has been determined that each appliance remaining connected to the common venting system properly vents when tested as outlined above, return doors, windows, exhaust fans, fireplace dampers, and any other fuel-burning appliance to their previous condition of use.
8. If improper venting is observed during any of the above tests, the common venting system must be corrected. See National Fuel Gas Code, ANSI 2223.1 (latest edition) or CAN/CGA B149.1 & .2 Canadian Installation Codes to correct improper operation of the common venting system.

Duct System

• The duct system should be designed and sized according to the methods in the Air Conditioning Contractors of America (ACCA) manual that is most appropriate to the installation application.
• A closed return air duct system shall be used. This shall not preclude the use of economizers or outdoor fresh air intake. It is recommended that supply and return air duct connections at the unit be made with flexible joints.
• The supply and return air duct systems should be designed for the CFM and static requirements of the job. They should not be sized by matching the dimensions of the duct connections on the unit.
• The unit is shipped ready for horizontal flow (side duct connections) or downflow (bottom duct connections). All units are equipped with a drain pan overflow switch that is installed and wired at the factory. Duct attachment screws are intended to go into the duct panel flanges. Duct-to-unit connections must be sealed and weatherproofed.

For horizontal duct systems:

1. Remove the duct covers on the side of the unit. They can be discarded.
2. Install the duct system to the unit.

For downflow duct systems:

1. Remove the duct covers on the side of the unit. Keep the screws and the covers as they will be re-installed later.
2. Remove the downflow duct covers located inside the unit. Remove the four screws securing each cover. Remove the covers from the unit. They can be discarded.
3. Remove screws located between the supply and return air openings that attach the blower deck to the base pan. These screws can interfere with bottom duct connections or roof curb seals. Discard these screws.
4. Install the duct system to the unit.
5. Re-install the duct covers removed in Step 1.

Filters

• Air filters are not supplied with the unit. A field-provided air filter must always be installed ahead of the evaporator coil and must be cleaned or replaced if necessary. Dirty filters will reduce the airflow of the unit.
• An optional filter rack kit may be purchased separately for installation inside the unit’s coil compartment. Air filter sizes are shown in Table 2 for use with a filter rack kit.

NOTE:
The filter rack must be installed before installation of the unit in applications where access to the rear panel is limited.

20 x 20 x 1

42, 48, 60| 20 x 20 x 1

Table 2. Unit Air Filter Sizes – inches

Condensate Drain

• This package unit is equipped with a 3/4” FPT coupling for condensate line connection. Plumbing must conform to local codes. Use a sealing compound on male pipe threads.
• Do not operate the unit without a drain trap. The condensate drain is on the negative pressure side of the blower; therefore, the air being pulled through the condensate line will prevent positive drainage without a proper trap.
• The condensate drain line must be properly trapped, routed to a suitable drain, and primed before unit commissioning.

NOTE:
Install drain lines and traps so they do not block service access to the unit.

• See Figure 2 for proper drain arrangement. The drain line must pitch to an open drain or pump to prevent clogging of the line. Seal around the drain connection with suitable material to prevent air leakage into the return air system.
• To prime the trap, pour several quarts of water into the drain, enough to fill the drain trap and line.

CAUTION
Drain lines should be hand-tightened only. Do not use tools to tighten the fitting into the drain.

Gas Piping

• Proper sizing of a gas piping depends on the cubic feet per hour of gas flow required, the specific gravity of the gas, and the length of run. National Fuel Gas Code 2223.1 latest edition should be followed in all cases unless superseded by local codes or gas company requirements. In Canada, refer to CAN/CGA B. 149.1 & .2 (latest edition).
• The heating value of the gas may differ with locality. The value should be checked with the local gas utility. For the temperature rise of the unit, see the unit rating plate.

Gas Piping Recommendations

• A drip leg and a ground joint union must be installed in the gas piping. A ground joint union is recommended by the manifold/valve.
• When required by local codes, a manual shutoff valve may have to be installed outside of the unit.
• Use pipe thread sealing compound resistant to propane gas sparingly on male threads.
• The gas supply should be a separate line and installed per all safety codes listed. After the gas connections have been completed, open the main shutoff valve admitting normal gas pressure to the mains. Check all joints for leaks with the soapy solution or other material suitable for the purpose.

WARNING
Never use a flame to check for gas leaks. Explosion causing injury or death may occur.

• The furnace and its field-supplied manual shutoff valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures over 1/2 PSIG (3.48kPa).
• A 1/8″ N.P.T. plugged tapping, accessible for test gauge connections, must be installed immediately upstream of the gas supply connection to the furnace.

Gas Connection
The gas supply line is routed through the gas entry location on the side of the unit (see Figure 3). A grommet is provided in the instruction bag and should be used to seal the gas supply line to the gas entry of the control compartment.

NOTE:
An optional bottom-entry gas kit is available for these units. See the kit instructions for proper installation details.

WARNING

• The furnace must be isolated from the gas supply piping system by closing the field-supplied manual shutoff valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 1/2 psig or 14″ w.c. If the piping system is to be tested at pressures over 1/2 psig, the furnace, and its shutoff valve must be disconnected from the gas supply piping system.
• Check all connections for leaks when piping is completed, using a soapy, non-chlorine-based solution. Some soaps used for leak detection are corrosive to certain metals.
• Carefully rinse piping thoroughly after completing leak detection.

WARNING
The danger of explosion. Can cause injury or product or property damage. Do not use matches, candles, flame, or other sources of ignition to check for leaks.

CAUTION
If a flexible gas connector is required or allowed by the authority that has jurisdiction, a black iron pipe shall be installed at the gas valve and must extend outside the cabinet. The flexible connector can then be added between the black iron pipe and the gas supply line.

Electrical Wiring

See Figure 4 and Figure 5

All wiring should be done per the National Electrical Code, ANSI/NFPA No. 70 (latest edition); Canadian Electrical Code Part 1, CSA C22.1 (latest edition); or local codes where they prevail. Use wiring with a temperature limitation of 75°C minimum. Run the 208 or 230-volt, 60-hertz electric power supply through a fused disconnect switch to the control box of the unit and connect as shown in the wiring diagram located on the inside of the control access panel.

The power supply to the unit must be N.E.C. Class 1 and must comply with all applicable codes. A disconnect switch should be field provided for the unit; follow local codes to determine what type of switch to use. The switch must be separate from all other circuits. If any of the wires supplied with the unit must be replaced, the replacement wire must be of the type shown on the wiring diagram. Electrical wiring must be sized to carry the minimum circuit ampacity marked on the unit. Use copper conductors only. Each unit must be wired with a separate branch circuit and be properly fused.

NOTE:
An optional bottom-entry power kit is available for these units. See the kit instructions for proper installation details.

CAUTION
When connecting electrical power and control wiring to the unit, waterproof- type connectors must be used so that water or moisture cannot be drawn into the unit during normal operation.

Thermostat
The room thermostat should be located on an inside wall where it will not be subject to drafts, sun exposure, or heat from electrical fixtures or appliances. Follow the manufacturer’s instructions enclosed with the thermostat for the general installation procedure. Color-coded insulated wires (#18 AWG) should be used to connect the thermostat to the unit.

Four wires are required for cooling. The heat anticipator setting is 0.75 amp.

Compressor
Units are shipped with compressor mountings factory-adjusted and ready for operation.

CAUTION
Do not loosen compressor mounting bolts.

Heating Start-Up

For Your Safety, Read Before Lighting

CAUTION
The furnace is equipped with a direct ignition control. Do not attempt to manually light the burners.

Pre-Start Checklist
Complete the following checks before starting the unit:

1. Check the type of gas being supplied. Be sure it is the same as listed on the unit nameplate.
2. Make sure that the vent cover has been properly installed.

To Light Main Burners

1. Turn off the electrical power to the unit.
2. Turn the thermostat to the lowest setting.
3. Slide the gas valve switch to the “ON” position (see Figure 6).
4. Turn on the electrical power to the unit.
5. Set the room thermostat to the desired temperature. (If the thermostat “set” temperature is above room temperature after the pre-purge time expires, main burners will light.)

To Shut Down Main Burners

1. Turn off the electrical power to the unit.
2. Slide the gas valve switch to the “OFF” position (see Figure 6).

Post-Start Checklist
After the entire control circuit has been energized and the heating section is operating, make the following checks:

Post-Start Checklist
After the entire control circuit has been energized and the heating section is operating, make the following checks:

1. Check for gas leaks, using soapy solution, in the unit piping as well as the supply piping.

2. Check the supply gas pressure. It must be within the limits shown on the rating plate. Supply pressure should be checked with all gas appliances in the building at full fire. At no time should the standby gas pressure exceed 13″ w.c., nor the operation pressure drop below 5″ w.c. for natural gas units. If gas pressure is outside these limits, contact the gas supplier for corrective action.

3. Select an indoor blower speed tap, that provides a temperature rise within the range specified on the rating plate.

4. Verify manifold gas pressure
   NOTE: For this measurement, the minimum permissible gas supply pressure is 5″ w.c. for natural gas.

   • Slide the gas valve switch to the “OFF” position (see Figure 6).

   • Remove the plug on the valve marked “OUTLET PRESSURE.”

   • Install a water manometer.

   • Slide the gas valve switch to the “ON” position and initiate a call for heat. During steady state operation, manifold pressure should be:
     Manifold Pressure (non-adjustable) 2.7 – 3.1” w.c.
     IMPORTANT
     DO NOT ADJUST THE GAS VALVE!
     Contact Technical Service for troubleshooting assistance if manifold pressure does not meet specifications.

   • After verifying pressure, turn the gas off, remove the manometer fitting, and replace the pipe plug.

   • Put the furnace in operation and check the plug for leaks using a soapy solution.

5. Check the furnace input rate by observing the gas meter, and making sure all other gas appliances are turned off. The test hand on the meter should be timed for at least one revolution, noting the number of seconds per revolution. The heating value of the gas can be obtained from the local utility.

NOTE:
Gas input must never exceed the input capacity shown on the rating plate. The furnace is equipped with natural gas-rated inputs with manifold pressure of 2.7 – 3.1″ w.c.

For example, by actual measurement, it takes 67 seconds for the hand on the 1-cubic foot dial to make a revolution with a 54,000 BTU/HR furnace running. The result is 53,731 BTU/HR (based on a heating value of 1,000 Btu/ft*), which is close to the 54,000 BTU/HR rating of the furnace.

High Altitude
The unit is rated for elevations up to 4500 feet with no modifications. Units are not certified for installations above 4500 feet.

Heat Anticipator
The heat anticipator setting is 0.75 amp. The anticipator setpoint must be correct. Too high of a setting will result in longer heat cycles and a greater temperature swing in the conditioned space. Reducing the value below the correct setpoint will give shorter “ON” cycles and may result in the lowering of the temperature within the conditioned space.

Operation

Cooling System

• The cooling system is factory-charged with HFC-R-410A.
• The compressor is hermetically sealed and base-mounted with rubber-insulated bolts.

Cooling Sequence of Operation

• When the thermostat calls for cooling, R is close to Y (see the wiring diagrams). This action completes the low voltage control circuit, energizing the compressor, condenser fan motor, and blower motor.
• Unit compressors have internal protection. In the event there is an abnormal rise in the temperature of the compressor, the protector will open and cause the compressor to stop.
• A combustion air inducer operates for the first 10 seconds of every cooling cycle to prevent insects from nesting in the flue outlet.

Blower Delay – Cooling
The circulating air blower is controlled by a timing circuit in the integrated blower/ignition control. Timings are not adjustable. The blower “ON” delay is 5 seconds after the compressor starts and the blower “OFF” timing is 60 seconds after the compressor shuts down.

NOTE:
There is no blower OFF delay when there is a call for G (fan only).

Cooling System Performance
This equipment is a self-contained, factory-optimized refrigerant system. The unit should not require adjustments to the system charge when properly installed. If unit performance is questioned, perform the following checks.

Ensure the unit is installed per the manufacturer’s instructions and that line voltage and air flow are correct. Refer to Table 3 for proper performance value. The indoor metering device varies by model. When checking the performance of a unit using an orifice for metering, refer to the suction superheat value to judge performance. When checking the performance of a unit that uses an expansion valve for metering, refer to the subcooling value to judge system performance. If the measured performance value varies from table value allowance, check internal seals, service panels, and duct work for air leaks, as well as restrictions and blower speed settings. If unit performance remains questionable, remove the system charge, evacuate to 500 microns, and weigh in the refrigerant to nameplate charge. The exact charge must be re- installed. Failure to comply will compromise system performance. If unit performance is still questionable, check for refrigerant-related problems, such as blocked coil or circuits, malfunctioning metering devices, or other system components.

Continuous Fan
With the proper thermostat and sub-base, continuous blower operation is possible by closing the R to G circuit. Cooling blower delay is also functional in this mode.

Heating Sequence of Operation
When the thermostat calls for heating, R is close to W. The following describes the gas heating sequence of operation.

1. A call for heat from the room thermostat signals the ignition control to energize the combustion air blower at ignition speed.
2. When the speed of the combustion air blower reaches proper RPM, the pressure switch closes, initiating a pre-purge period (30 seconds nominal).
3. When the pre-purge period has expired, the ignition control energizes the main gas valve and spark electrode for 10 seconds. Combustion air blower ramps from ignition speed to continuous run speed.
4. If the flame sensor does not sense that a flame has been established in the 10-second interval, then the ignition control will de-energize the gas valve, begin a 30-second inter-purge period, and then initiate another trial for ignition.
5. The ignition control is designed to repeat this “trial for ignition” a total of three times. If, at the end of the third trial, flame still has not been established, then the ignition control will try to light again 1 hour later. The 1-hour retry is indefinite. The ignition control can be reset by interrupting the unit power or the thermostat circuit.
6. When W1 is energized from the room thermostat, the circulating air blower is energized after a 30-second blower delay.
7. When the thermostat is satisfied, the combustion air blower and gas valve are de-energized. The circulation air blower will continue to run for a short period after the furnace is shut down.

Blower Delay – Heating

• The circulating air blower “ON” delay is 30 seconds after “W” signal is received to allow the furnace to warm up.
• The circulating air blower “OFF” delay is 180 seconds after shutting down the burners. This delay is not adjustable.

Safety Controls
The control circuit includes the following safety controls:

• Limit Control
  This control is located behind the heat exchanger access panel and is designed to open at abnormally high circulating air temperatures. It resets automatically. The limit control operates when a high temperature condition, caused by inadequate airflow, occurs. This closes the main gas valve.

• Pressure Switch
  If the combustion air blower should fail, the pressure switch prevents the spark electrode and gas valve from being energized.

• Flame Sensor
  If the ignition control does not receive a signal from the flame sensor indicating that the burners have established flame, the gas valve closes after the 10-second trial for ignition period.

• Burner Temperature Switch
  The burner temperature switch is located on the combustion air intake elbow adjacent to the gas manifold. In the event of excessive burner heat, the switch shuts off the ignition control and closes the main gas valve. The switch resets automatically.

• Secure Owner’s Approval
  When the system is functioning properly, secure the owner’s approval. Show the owner the location of all disconnect switches and the thermostat. Instruct the owner on how to start and stop the unit and how to adjust temperature settings within the limitations of the system.

Maintenance

Periodic inspection and maintenance normally consists of changing or cleaning the filters and cleaning the evaporator coil. On occasion, other components of the furnace may also require cleaning.

WARNING
Shut off all electrical power to the unit before conducting any maintenance procedures. Failure to do so could cause personal injury.

Filters

• Filters are not supplied with the unit. Inspect once a month.
• Replace disposable or clean permanent type as necessary.
• Do not replace the permanent type with a disposable one.

Motors
Indoor and outdoor fan and vent motors are permanently lubricated and require no maintenance.

Evaporator Coil
Dirt and debris should not be allowed to accumulate on the evaporator coil surface or other parts of the air circuit. Cleaning should be done as often as necessary to keep the coil clean. Use a brush, vacuum cleaner attachment, or other suitable means. If water is used to clean the coil, be sure the power to the unit is shut off before cleaning. Care should be used when cleaning the coil so that the coil fins are not damaged.

Do not permit the hot condenser air discharge to be obstructed by overhanging structures or shrubs.

Condenser Coil

• Clean the condenser coil annually with water and inspect it monthly during the cooling season.
• The condenser coil may need to be cleaned at startup in case oil from the manufacturing process is found on the condenser coil.

Combustion Air Intake

• Ensure sufficient combustion air is available to the burners.
• Clean combustion air intake screen and clear debris from vestibule compartment louvers and unit exterior louver panels.

Vent Outlet
Visually inspect the vent outlet periodically to make sure that there is no buildup of soot or dirt. If necessary, clean to maintain an adequate opening to discharge flue products.

Control System Diagnostics

LED Status

| Flashing Rate|

Fault Description

---|---|---
Slow Flash| One flash per
second| Normal operation: No call for heat
Fast Flash| Two flashes per
second| Normal operation: Call for heat
2 Flash| Two flashes in
second with a 1-second pause| System lockout: Failed to detect or sustain flame
3 Flash| Three flashes in
1.5 seconds with 1-second pause| The pressure switch senses incorrect pressure or the gas valve coil is open.
4 Flash| Four flashes in
2 seconds with 1-second pause| High limit or rollout switch open

5 Flash

| Five flashes in
2.5 seconds with 1-second pause| Flame sensed and gas valve not energized
Steady| —| Internal failure: Micro-controller failure; self-check

Table 4. Fault Codes

Table 5. Cooling Performance – Gas/Electric Models

80 DB / 67 WB Deg. Return Air| Air Temperature Entering Evaporator Coil, Degree F
---|---
Cooling Input (1000 BTU)| ****

Pressure

| ****

65°

| ****

70°

| ****

75°

| ****

80°

| ****

85°

| ****

90°

| ****

95°

| ****

100°

| ****

105°

| ****

110°

| ****

115°

24| ****

Suction

| 135| 135| 135| 136| 137| 140| 143| 147| 151| 157| 163
30| 135| 137| 139| 141| 144| 146| 149| 151| 154| 157| 160
36| 136| 138| 139| 141| 143| 145| 147| 149| 151| 154| 156
42| 137| 137| 136| 137| 138| 140| 142| 145| 149| 154| 159
48| 138| 138| 139| 140| 141| 142| 144| 147| 150| 153| 157
60| 130| 132| 133| 135| 137| 139| 140| 143| 145| 147| 149
24| ****

Liquid

| 233| 250| 268| 287| 307| 329| 352| 377| 402| 429| 458
30| 242| 259| 278| 298| 319| 341| 364| 390| 416| 443| 472
36| 257| 275| 294| 315| 337| 361| 387| 412| 440| 469| 499
42| 250| 269| 288| 308| 330| 353| 377| 402| 429| 456| 485
48| 268| 285| 304| 325| 347| 370| 398| 422| 451| 481| 512
60| 250| 268| 287| 308| 330| 353| 378| 404| 431| 460| 490

Table 6. Blower Performance

Model| Blower Tap| SCFM @ External Static Pressure (in w.c.) – No filter, Dry Coil
---|---|---
0.1| 0.2| 0.3| 0.4| 0.5| 0.6

24

| Tap 1| Fan Only| 640| 590| 545| 495| 445| 385
Tap 2| Cooling (Low Static)| 820| 785| 750| 715| 675| 635
Tap 3| Cooling (High Static)| 960| 925| 885| 850| 815| 780
Tap 4| Heating (Low Static)| SCFM| 925| 890| 865| 830| 795| 765
Rise| 44| 46| 47| 49| 51| 53
Tap 5| Heating (High Static)| SCFM| 1005| 970| 940| 910| 880| 855
Rise| 41| 42| 43| 45| 46| 48

30

| Tap 1| Fan Only| 670| 625| 580| 535| 490| 440
Tap 2| Cooling (Low Static)| 1020| 985| 955| 920| 890| 860
Tap 3| Cooling (High Static)| 1140| 1105| 1075| 1045| 1015| 1000
Tap 4| Heating (Low Static)| SCFM| 935| 895| 860| 835| 800| 765
Rise| 44| 45| 47| 49| 51| 53

Tap 5

| Heating (High Static)| SCFM| 1020| 990| 955| 925| 895| 865
Rise| 40| 41| 43| 44| 46| 47

36

| Tap 1| Fan Only| 795| 745| 700| 645| 590| 525
Tap 2| Cooling (Low Static)| 1250| 1215| 1180| 1145| 1115| 1085
Tap 3| Cooling (High Static)| 1390| 1355| 1320| 1285| 1250| 1205

Tap 4

| Heating (Low Static)| SCFM| 935| 890| 855| 815| 770| 725
Rise| 44| 46| 48| 50| 53| 56

Tap 5

| Heating (High Static)| SCFM| 1050| 1010| 970| 935| 895| 860
Rise| 39| 40| 42| 44| 46| 47

42

| Tap 1| Fan Only| 775| 700| 615| 535| 470| 390
Tap 2| Cooling (Low Static)| 1460| 1420| 1380| 1340| 1300| 1255
Tap 3| Cooling (High Static)| 1600| 1555| 1510| 1470| 1430| 1390

Tap 4

| Heating (Low Static)| SCFM| 1410| 1370| 1325| 1285| 1240| 1200
Rise| 39| 40| 41| 42| 44| 45

Tap 5

| Heating (High Static)| SCFM| 1535| 1495| 1555| 1415| 1375| 1335
Rise| 35| 36| 37| 38| 39| 41

48

| Tap 1| Fan Only| 1065| 1020| 965| 910| 850| 790
Tap 2| Cooling (Low Static)| 1665| 1630| 1595| 1560| 1530| 1490
Tap 3| Cooling (High Static)| 1775| 1735| 1700| 1660| 1605| 1555

Tap 4

| Heating (Low Static)| SCFM| 1405| 1370| 1325| 1290| 1245| 1205
Rise| 39| 40| 41| 42| 44| 45

Tap 5

| Heating (High Static)| SCFM| 1515| 1480| 1440| 1405| 1370| 1325
Rise| 36| 37| 38| 39| 40| 41

60

| Tap 1| Fan Only| 1240| 1190| 1125| 1060| 995| 940
Tap 2| Cooling (Low Static)| 1885| 1840| 1800| 1755| 1715| 1675
Tap 3| Cooling (High Static)| 1965| 1920| 1875| 1835| 1785| 1750

Tap 4

| Heating (Low Static)| SCFM| 1420| 1365| 1315| 1265| 1215| 1155
Rise| 38| 40| 41| 43| 45| 47

Tap 5

| Heating (High Static)| SCFM| 1570| 1520| 1470| 1420| 1370| 1320
Rise| 35| 36| 37| 38| 40| 41

Wiring Diagram

Figure 7. Wiring Diagram – Single Phase CT

GE Appliances
A Haier Company Appliance Park Louisville, KY 40225.

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