Goodman MVC80 Gas Furnace Instruction Manual

Installation Instructions
for MVC80 & CVC80
Gas Furnace CATEGORY I

MVC80 Gas Furnace

These furnaces comply with requirements embodied in the American National Standard / National Standard of Canada ANSI Z21.47·CSA-2.3 Gas Fired Central Furnaces.

Installer: Affix all manuals adjacent to the unit.
The precautions listed in this Installation Manual are intended as supplemental to existing practices. However, if there is a direct conflict between existing practices and the content of this manual, the precautions listed herein take precedence.
**RECOGNIZE THIS SYMBOL AS A SAFETY PRECAUTION.**
*NOTE: Please contact your distributor or our website for the applicable Specification Sheet referred to in this manual.
WARNING
Do not bypass safety devices.
WARNING
Only personnel that have been trained to install, adjust, service, maintenance or repair (hereinafter, “service”) the equipment specified in this manual should service the equipment. The manufacturer will not be responsible for any injury or property damage arising from improper service or service procedures. If you service this unit, you assume responsibility for any injury or property damage which may result. In addition, in jurisdictions that require one or more licenses to service the equipment specified in this manual, only licensed personnel should service the equipment. Improper installation, adjustment, servicing, maintenance or repair of the equipment specified in this manual, or attempting to install, adjust, service or repair the equipment specified in this anual without proper training may result in product damage, property damage, personal injury or death.
This device, which was assembled by Daikin Comfort Technologies Manufacturing, L.P., contains a component that is classified as an intentional radiator. This intentional radiator has been certified by the FCC: FCC ID QOQBGM111. And this international radiator has an Industry Canada ID: IC 5123A-BGM111.
This device complies with Part 15 of the FCC’s Rules. Operation of this device is subject to two conditions:

1. This device may not cause harmful interference; and
2. This device must accept any interference received, including interference that may cause undesirable operation.

And this device meets the applicable Industry Canada technical specifications.
The manufacturer of the intentional radiator (model no. BGM111) is Silicon Laboratories Finland Oy, which can be contacted by calling 617951-0200. (www.silabs.com)
Daikin Comfort Technologies Manufacturing, L.P. may be contacted by calling 713-861-2500, or at 19001 Kermier Rd., Waller TX 77484. (www.goodmanmfg.com)
80% HEX DO NOT LIFT PRODUCT USING HEAT EXCHANGER

Our continuing commitment to quality products may mean a change in specifications without notice.
19001 Kermier Rd. Waller, TX 77484
www.goodmanmfg.com
www.amana-hac.com
© 2019-2022 Daikin Comfort Technologies Manufacturing, L.P.
is a registered trademark of Maytag Corporation or its related companies and is used under license.
All rights reserved.

IOG-2023E~IOG-2023E~072022~6

SAFETY CONSIDERATIONS

Adhere to the following warnings and cautions when installing, adjusting, altering, servicing, or operating the furnace. To ensure proper installation and operation, thoroughly read this manual for specifics pertaining to the installation and application of this product.
WARNING
FIRE OR EXPLOSION HAZARD
Failure to follow the safety warnings exactly could result in serious injury, death or property damage.
Never test for gas leaks with an open flame.
Use a commercially available soap solution made specifically for the detection of leaks to check all connections. A fire or explosion may result causing property damage, personal injury or loss of life.
This furnace is manufactured for use with natural gas. It may be field converted to operate on L.P. gas by using the appropriate L.P. conversion kit listed in the PROPANE GAS/HIGH ALTITUDE INSTALLATIONS section of this manual.
Install this furnace only in a location and position as specified in LOCATION REQUIREMENTS & CONSIDERATIONS section and INSTALLATION POSITIONS section of this manual.
Provide adequate combustion and ventilation air to the furnace as specified in COMBUSTION & VENTILATION AIR REQUIREMENTS section of this manual.
Combustion products must be discharged to the outdoors. Connect this furnace to an approved vent system only, as specified in Category 1 Venting section of this manual.
Never test for gas leaks with an open flame. Use a commercially available soap solution made specifically for the detection of leaks to check all connections, as specified in GAS SUPPLY AND PIPING section of this manual.
Always install a furnace to operate within the furnace’s intended temperature- rise range with a duct system which has external static pressure within the allowable range, as specified on the furnace rating plate and OPERATIONAL CHECKS section of these instructions.
When furnace duct(s) supply air outside the space containing the furnace, a return air duct must terminate in the same space as the supply duct and be sealed to the furnace casing.
A gas-fired furnace for installation in a residential garage must be installed as specified in the LOCATION REQUIREMENTS AND CONSIDERATIONS section of this manual.
This furnace may be used as a construction site heater only if certain conditions are met. These conditions are listed in the PRODUCT APPLICATION section of this manual.
WARNING
To prevent personal injury or death due to improper installation, adjustment, alteration, service or maintenance, refer to this manual. For additional assistance or information, consult a qualified installer, servicer agency or the gas supplier.
WARNING
To prevent possible property damage, personal injury or death due to electrical shock, the furnace must be located to protect the electrical components from water.
DANGER
CARBON MONOXIDE POISONING HAZARD
Special Warning for Installation of Furnace or Air Handling Units in Enclosed Areas such as Garages, Utility Rooms or Parking Areas carbon monoxide producing devices (such as an automobile, space veater, gas water heater, etc.) should not be operated in enclosed areas iuch as unventilated garages, utility rooms or parking areas because of the danger of carbon monoxide (CO) poisoning resulting from the exhaust amissions. If a furnace or air handler is installed in an enclosed area such is a garage, utility room or parking area and a carbon monoxide producing Jevice is operated therein, there must be adequate, direct outside rentilation.
This ventilation is necessary to avoid the danger of CO poisoning which ‘an occur if a carbon monoxide producing device continues to operate in he enclosed area. Carbon monoxide emissions can be (re)circulated throughout the structure if the furnace or air handler is operating in any node.
CO can cause serious illness including permanent brain damage or death.
B10259-216
WARNING
Should overheating occur or the gas supply fail to shut off, turn off the manual gas shutoff valve external to the furnace before turning off the electrical supply.
WARNING
If the information in these instructions is not followed exactly, a fire or explosion may result causing property damage, personal injury or loss of life.
– do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.
– WHAT TO DO IF YOU SMELL GAS:

• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any phone in your building.
• Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions. If you cannot reach your gas supplier, call the fire department.

– Installation and service must be performed by a qualified installer, service agency or the gas supplier.

WARNING
Heating unit should not be utilized without reasonable, routine, inspection, maintenance and supervision. If the building in which any such device is located will be vacant, care should be taken that such device is routinely inspected, maintained and monitored. In the event that the building maybe exposed to freezing temperatures and will be vacant, all water-bearing pipes should be drained, the building should be properly winterized, and the water source closed.
In the event that the building may be exposed to freezing temperatures and will be vacant, any hydronic coil units should be drained as well and, in such case, alternative heat sources should be utilized.
WARNING
Possible property damage, personal injury or death due to fire, explosion, smoke, soot, condensation, electrical shock or carbon monoxide may result from improper installation, repair operation, or maintenance of this product.
WARNING
To prevent personal injury or death due to improper installation, adjustment, alteration, service, or maintenance, refer to this manual. For additional assistance or information, consult a qualified installer, servicer, agency or the gas supplier.
WARNING
To prevent personal injury or death due to asphyxiation, this furnace must be Category I vented. Do not vent using Category III venting. Provisions must be made for proper venting system. The length of flue pipe could be a limiting factor in locating the furnace.
Additional Safety Considerations

• This furnace is approved for Category I Venting only.
• Provisions must be made for venting combustion products outdoors through a proper venting system.

The length of flue pipe could be a limiting factor in locating the furnace.
Shipping Inspection
All units are securely packed in shipping containers tested according to International Safe Transit Association specifications. The carton must be checked upon arrival for external damage. If damage is found, a request for inspection by carrier’s agent must be made in writing immediately.
The furnace must be carefully inspected on arrival for damage and bolts or screws which may have come loose in transit. In the event of damage the consignee should:

1. Make a notation on delivery receipt of any visible damage to shipment or container.
2. Notify carrier promptly and request an inspection.
3. With concealed damage, carrier must be notified as soon as possible – preferably within five days.
4. File the claim with the following support documents within a nine month statute of limitations.
   • Original or certified copy of the Bill of Lading, or indemnity bond.
   • Original paid freight bill or indemnity in lieu thereof.
   • Original or certified copy of the invoice, showing trade and other discounts or reductions.
   • Copy of the inspection report issued by carrier’s representative at the time damage is reported to carrier.

The carrier is responsible for making prompt inspection of damage and for a thorough investigation of each claim.
The distributor or manufacturer will not accept claims from dealers for transportation damage.
Keep this literature in a safe place for future refer ence.
Electrostatic Discharge (ESD) Precautions
NOTE: Discharge body’s static electricity before touching unit. An electrostatic discharge can adversely affect electrical components.
Use the following precautions during furnace installation and servicing to protect the integrated control module from damage. By putting the furnace, the control, and the person at the same electrostatic potential, these steps will help avoid exposing the integrated control module to electrostatic discharge. This procedure is applicable to both installed and non-installed (ungrounded) furnaces.

1. Disconnect all power to the furnace. Do not touch the integrated control module or any wire connected to the control prior to discharging your body’s electrostatic charge to ground.
2. Firmly touch a clean, unpainted, metal surface of the furnaces near the control. Any tools held in a person’s hand during grounding will be discharged.
3. Service integrated control module or connecting wiring following the discharge process in step 2. Use caution not to recharge your body with static electricity (i.e., do not move or shuffle your feet, do not touch ungrounded objects, etc.). If you come in contact with an ungrounded object, repeat step 2 before touching control or wires.
4. Discharge your body to ground before removing a new control from its container. Follow steps 1 through 3 if installing the control on a furnace. Return any old or new controls to their containers before touching any ungrounded object.

To The Installer
Before installing this unit, please read this manual thoroughly to familiarize yourself with specific items which must be adhered to, including but not limited to: unit maximum external static pressure, gas pressures, BTU input rating, proper electrical connections, circulating air temperature rise, minimum or maximum CFM, and motor speed connections, and venting. These furnaces are designed for Category I venting only.
WARNING
To prevent property damage, personal injury or death due to fire, do not install the furnace in a mobile home, trailer, or recreational vehicle.

PRODUCT APPLICATION

This furnace is primarily designed for residential home- heating applications. It is not designed or certified for use in mobile homes, trailers or recreational vehicles. Neither is it designed or certified for outdoor applications. The furnace must be installed indoors (i.e., attic space, crawl space, or garage area provided the garage area is enclosed with an operating door).
VALID EQUIPMENT COMBINATIONS
Furnace Alone –Furnace + 1 Stage Non-Communicating A/C
Furnace + 2 Stage Non-Communicating A/C
Furnace + 1 Stage Non-Communicating H/P
Furnace + 2 Stage Non-Communicating H/P
Furnace + Communicating A/C
Furnace + Communicating H/P
Furnace + Communicating A/C Inverter
Furnace + Communicating H/P Inverter
This furnace can be used in the following non-industrial commercial applications:
Schools, Office buildings, Churches, Retail stores, nursing homes, Hotels/motels, Common or office areas
In such applications, the furnace must be installed with the following stipulations:

• It must be installed per the installation instructions provided and per local and national codes.
• It must be installed indoors in a building constructed on site.
• It must be part of a ducted system and not used in a free air delivery application.
• It must not be used as a “make-up” air unit.
• All other warranty exclusions and restrictions apply.

This furnace may be used as a construction site heater ONLY if all of the following conditions are met:

• The vent system is permanently installed per these installation instructions.
• A room thermostat is used to control the furnace. Fixed jumpers that provide continuous heating CANNOT be used and can cause long term equipment damage. Bi-metal thermostats, or any thermostat affected by vibration must not be used during construction.
• Return air ducts are provided and sealed to the furnace.
• A return air temperature range between 60ºF (16ºC) and 80ºF (27ºC) is maintained.
• Air filters are installed in the system and replaced daily during construction and upon completion of construction.
• The input rate and temperature rise are set per the furnace rating plate.
• 100% outside air must be used for combustion during construction. Temporary ducting may be used to supply outside air to the furnace for combustion – do not connect this duct directly to the furnace. Size this duct according to NFPA 54/ANSI Z223.1 section for Combustion and Ventilation Air.
• The furnace heat exchanger, components, duct system, air filters and evaporator coils are thoroughly cleaned following final construction clean up by a qualified person.
• All furnace operating conditions (including ignition, input rate, temperature rise and venting) are verified by a qualified person according to these installation instructions.
• Furnace doors must be in place on the furnace while the furnace is operating in any mode.
• Damage or repairs due to failure to comply with these requirements are not covered under the warranty.

NOTE: The Commonwealth of Massachusetts requires that the following additional requirements must also be met:

• Gas furnaces must be installed by a licensed plumber or gas fitter.
• A T-handle gas cock must be used.
• If the unit is to be installed in an attic, the passageway to and the service area around the unit must have flooring.

WARNING
To prevent property damage, personal injury or death due to fire, do not install the furnace in a mobile home, trailer, or recreational vehicle.
To ensure proper furnace operation, install, operate and maintain the furnace in accordance with these installation and operation instructions, all local building codes and ordinances. In their absence, follow the latest edition of the National Fuel Gas Code (NFPA 54/ ANSI Z223.1) and/or local plumbing or waste water codes, and other applicable codes.
A copy of the National Fuel Gas Code (NFPA 54/ANSI Z223.1) can be obtained from any of the following:
American National Standards Institute
25 West 43rd Street, 4th Floor
New York, NY 10036
National Fire Protection Association
1 Batterymarch Park
Quincy, MA 02169-7471
CSA International
8501 East Pleasant Valley
Independence, OH 44131
The rated heating capacity of the furnace should be greater than or equal to the total heat loss of the area to be heated.
The total heat loss should be calculated by an approved method or in accordance with “ASHRAE Guide” or “Manual J-Load Calculations” published by the Air Conditioning Contractors of America.
In the USA, this furnace MUST be installed in accordance with the latest edition of the ANSI Z223.1 booklet entitled “National Fuel Gas Code” (NFPA 54), and the requirements or codes of the local utility or other authority having jurisdiction.
Additional helpful publications available from the NFPA are, NFPA 90A – Installation of Air Conditioning and Ventilating System and NFPA 90B – Warm Air Heating and Air Conditioning System.
All venting shall be in accordance with the National Fuel Gas Code, ANSI Z223.1, or applicable local building and/or air conditioning codes.
NOTE: Furnaces with NOx screens meet the  California NOx emission standards and Californiaseasonal efficiency standards. ANNUAL inspections of the furnace and its vent system is strongly recommended.

LOCATION REQUIREMENTS AND CONSIDERATIONS

Your unit model type determines which installation procedures must be used. For MVC80 models, you must follow instructions for Horizontal Left, Horizontal Right or Upflow installations only. These furnaces are not approved for Downflow installations.
CVC80 models may be installed in the Downflow position as well as Horizontal Left & Horizontal Right positions.
WARNING
To prevent possible equipment damage, property damage, personal injury or death, the following bullet points must be observed when installing this unit.
Follow the instructions listed below when selecting a furnace location. Refer also to the guidelines provided in the Combustion and Ventilation Air Requirements.

• Centrally locate the furnace with respect to the proposed or existing air distribution system.

• Ensure the temperature of the return air entering the furnace is between 55°F and 100°F when the furnace is heating.

• Provisions must be made for venting combustion products outdoors through a proper venting system. The length of flue pipe could be a limiting factor in locating the furnace.

• Ensure adequate combustion air is available for the furnace. Improper or insufficient combustion air can expose building occupants to gas combustion products that could include carbon monoxide. Refer to Combustion and Ventilation Air Requirements section

• The furnace must be level. If the furnace is to be set on a floor that may become wet or damp at times, the furnace should be supported above the floor on a concrete base sized approximately 1-1/2” larger than the base of the furnace.

• Ensure upflow or horizontal furnaces are not installed directly on carpeting, or any other combustible material. The only combustible material allowed is wood.

• Exposure to contaminated combustion air will result in safety and performance-related problems. Do not install the furnace where the combustion air is exposed to the following substances: chlorinated waxes or cleaners chlorine-based swimming pool chemicals water softening chemicals deicing salts or chemicals carbon tetrachloride halogen type refrigerants cleaning solutions (such as perchloroethylene) printing inks paint removers varnishes hydrochloric acid cements and glues antistatic fabric softeners for clothes dryers and masonry acid washing materials

• If the furnace is used in connection with a cooling unit, install the furnace upstream or in parallel with the cooling unit coil. Premature heat exchanger failure will result if the cooling unit coil is placed ahead of the furnace.

• For vertical applications, the minimum cooling coil width shall not be less than furnace width minus 1”. Additionally, a coil installed above an upflow furnace or under a counterflow furnace may be the same width as the furnace or may be one size larger than the furnace. Example: a “C” width coil may be installed with a “B” width furnace.

• For upflow applications, the front of the coil and furnace must face the same direction.

• If the furnace is installed in a residential garage, position the furnace so that the burners and ignition source are located not less than 18 inches (457 mm) above the floor. Protect the furnace from physical damage by vehicles.

• If the furnace is installed horizontally, the furnace access doors must be vertical so that the burners fire horizontally into the heat exchanger. Do not install the unit with the access doors on the “up/top” or “down/ bottom” side of the furnace.

• Do not connect this furnace to a chimney flue that serves a separate appliance designed to burn solid fuel.

• Counterflow installation over a noncombustible floor. Before setting the furnace over the plenum opening, ensure the surface around the opening is smooth and level. A tight seal should be made between the furnace base and floor by using a silicon rubber caulking compound or cement grout.

• Counterflow installation over a combustible floor. If installation over a combustible floor becomes necessary, use an accessory subbase (see Specification Sheet applicable to your model for details). A special accessory subbase must be used for upright counterflow unit installations over any combustible material including wood. Follow the instructions with the subbase for proper installations.
  Do not install the furnace directly on carpeting, tile, or other combustible material other than wood flooring.
  NOTE: The subbase will not be required if an air conditioning coil is installed between the supply air opening on the furnace and the floor. The air conditioning coil must be downstream from the heat exchanger of the furnace.

• Adequate combustion/ventilation air must be supplied to the closet.

• Furnace must be completely sealed to floor or base. Combustion / Ventilation air supply pipes must terminate 12” from top of closet and 12” from floor of closet. DO NOT remove solid base plate for side return.

• Return air ducts must be completely sealed to the furnace and terminate outside the enclosure surfaces.

Clearances and Accessibility
Unobstructed front clearance of 24” for servicing is recommended.

Top clearance for horizontal configuration – 1”
Installation Positions
MVC80 model furnaces may be installed vertically (upflow) or horizontally with left or right side down. CVC80 model furnaces may be installed vertically (downflow) or horizontally with left or right side down. Do not install this furnace on its back. For vertically installed upflow furnaces, return air ductwork may be attached to the side panel(s) and/or basepan. For horizontally installed upflow furnaces, return air ductwork must be attached to the basepan. For counterflow furnaces, return ductwork must be attached to the blower compartment end of the furnace.
NOTE: Ductwork must never be attached to the back of the furnace.
Horizontal Installation
Line contact to framing is permitted when installed in the horizontal configuration. Line contact is defined as the portion of the cabinet that is formed by the intersection of the top and side. ACCESSIBILITY CLEARANCE, WHERE GREATER, SHOULD TAKE PRECEDENCE OVER MINIMUM FIRE PROTECTION CLEARANCE. A gasfired furnace for installation in a residential garage must be installed so that the ignition source and burners are located not less than eighteen inches (18”) above the floor and is protected or located to prevent physical damage by vehicles.
A gas furnace must not be installed directly on carpeting, tile, or other combustible materials other than wood flooring.
Furnace Suspension
If suspending the furnace from rafters or joist, use 3/8” threaded rod and 2”x2”x3/8” angle iron as shown below. The length of rod will depend on the application and the clearances necessary. WARNING
CARBON MONOXIDE POISONING HAZARD
Failure to follow the steps outlined below for each appliance connected to the venting system being placed into operation could result in carbon monoxide poisoning or death.
The following steps shall be followed with each appliance connected to the venting system placed in operation, while any other appliances connected to the venting system are not in operation:

1. Seal any unused openings in the venting system.

2. Inspect the venting system for proper size and horizontal pitch, as required by the National Fuel Gas Code, ANSI Z223.1 or the Natural Gas and Propane Installation Code, CSA B149.1-15 and these instructions.
   Determine that there is no blockage or restriction, leakage, corrosion and other deficiencies which could cause an unsafe condition.

3. As far as practical, close all building doors and windows and all doors between the space in which the appliance(s) connected to the venting system are located and other spaces of the building.

4. Close fireplace dampers.

5. Turn on clothes dryers and any appliance not connected to the venting system. Turn on any exhaust fans, such as range hoods and bathroom exhausts, so they shall operate at maximum speed.
   Do not operate a summer exhaust fan.

6. Follow the lighting instructions. Place the appliance being inspected in operation. Adjust thermostat so appliance shall operate continuously.

7. Test for spillage from draft hood appliances at the draft hood relief opening after 5 minutes of main burner operation. Use the flame of a match or candle.

8. If improper venting is observed during any of the above tests, the venting system must be corrected in accordance with the National Fuel Gas Code ANSI Z223.1/NFPA 54 and/or National Gas and Propane Installation Code CSA B149.1-15.

9. After it has been determined that each appliance connected to the venting system properly vents when tested as outlined above, return doors, windows, exhaust fans, fireplace dampers and any other gas burning appliance to their previous conditions of use.

Corrections must be in accordance with the latest edition of the National Fuel Gas Code NFPA 54/ANSI Z223.1 and/ or CAN/CSA B149 Installation Codes.
If resizing is required on any portion of the venting system, use the appropriate table in the latest edition of the National Fuel Gas Code ANSI Z223.1.
Thermostat Location
In an area having good air circulation, locate the thermostat about five feet high on a vibration-free inside wall. Do not install the thermostat where it may be influenced by any of the following:

• Drafts, or dead spots behind doors, in corners, or under cabinets.
• Hot or cold air from registers.
• Radiant heat from the sun.
• Light fixtures or other appliances.
• Radiant heat from a fireplace.
• Concealed hot or cold water pipes, or chimneys.
• Unconditioned areas behind the thermostat, such as an outside wall.

Consult the instructions packaged with the thermostat for mounting instructions and further precautions.

COMBUSTION & VENTILATION AIR REQUIREMENTS

WARNING
To avoid property damage, personal injury or death, sufficient fresh air for proper combustion and ventilation of flue gases must be supplied. Most homes require outside air be supplied into the furnace area.
Improved construction and additional insulation in buildings have reduced heat loss by reducing air infiltration and escape around doors and windows. These changes have helped in reducing heating/cooling costs but have created a problem supplying combustion and ventilation air for gas fired and other fuel burning appliances. Appliances that pull air out of the house (clothes dryers, exhaust fans, fireplaces, etc.) increase the problem by starving appliances for air.
House depressurization can cause back drafting or improper combustion of gas- fired appliances, thereby  exposing building occupants to gas combustion products that could include carbon monoxide.
If this furnace is to be installed in the same space with other gas appliances, such as a water heater, ensure there is an adequate supply of combustion and ventilation air for all appliances. Refer to the latest edition of the National Fuel Gas Code NFPA 54/ANSI Z223.1 or CAN/ CSA B149 Installation Codes or applicable provisions of the local building codes for determining the combustion air requirements for the appliances.
This furnace must use indoor air for combustion. It cannot be installed as a direct vent (i.e., sealed com bustion) furnace.
Most homes will require outside air be supplied to the furnace area by means of ventilation grilles or ducts connecting directly to the outdoors or spaces open to the outdoors such as attics or crawl spaces.
Category I Venting (Vertical Venting)
WARNING
To prevent personal injury or death due to asphyxiation, this furnace must be Category I vented. Do not vent using Category III venting. Provisions must be made for proper venting system.
Category I Venting is venting at a non-positive pressure. A furnace vented as Category I is considered a fan-assisted appliance and the vent system does not have to be “gas tight”. NOTE: Gas furnaces with induced draft blowers draw products of combustion through a heat exchanger allowing, in some instances, common venting with natural draft appliances (i.e. water heaters). All installations must be vented in accordance with National Fuel Gas Code NFPA 54/ANSI Z223.1 – latest edition.
NOTE: The vertical height of the Category I venting system must be at least as great as the horizontal length of the venting system.
WARNING
To prevent possible personal injury or death due to asphyxiation, common venting with other manufacturer’s induced draft appliances is not allowed.
The minimum vent diameter for the Category I venting system is as shown:

Under some conditions, larger vents than those shown above may be required or allowed. When an existing furnace is removed from a venting system serving other appliances, the venting system may be too large to properly vent the remaining attached appliances.
Furnaces are shipped with the induced draft blower discharging from the top of the furnace (“Top” is as viewed for an upflow installation). The induced draft blower on MVC80 models can be rotated 90 degrees for Category I venting. For furnaces installed vertically or horizontally, a four-inch single wall pipe can be used to extend the induced draft blower outlet 1/2” beyond the furnace cabinet.
On MVC80 furnaces installed upflow or horizontally with left side down, the draft inducer may be rotated to discharge from the right side of the cabinet. When rotating the inducer a chimney transition bottom kit (part # 4053501S) is needed for proper alignment of the inducer outlet and the vent exit hole in the side of the cabinet. The inducer may NOT be rotated on *CVC80 model furnaces regardless of installation position.
THIS PRODUCT IS NOT DESIGNED FOR COUNTERCLOCKWISE INDUCED DRAFT BLOWER ROTATION.
Vent the furnace in accordance with the National Fuel Gas Code NFPA 54/ANSI Z223.1 – latest edition. Venting
THIS FURNACE IS NOT DESIGN CERTIFIED TO BE HORIZONTALLY VENTED.
To rotate the induced draft blower clockwise, you will need to purchase one (0270F01119) chimney transition bottom kit.

1. Disconnect electrical power from the furnace.

2. Disconnect the induced draft blower power leads, flue pipe, and pressure switch tubing.

3. Remove the round cutout from the right side of the wrapper.

4. Remove and save the four screws that fasten the induced draft blower to the flue collector box.

5. Remove and save the three screws that hold the chimney assembly to the induced draft blower.

6. Remove and save the four screws that fasten the chimney top to the chimney bottom.

7. Remove the chimney transition bottom from the transition bottom kit.

8. Install the chimney top with the four screws retained from step 6 onto the new chimney transition bottom from the transition bottom kit.

9. Install chimney assembly with the three screws retained from step 5 onto the induced draft blower.

10.  Reinstall the induced draft blower rotating it 90 degrees clockwise from the original upflow configuration using the four screws retained in step 3. Ensure the gasket located between the induced draft blower and the collector box is rotated accordingly.

11. Reconnect the induced draft blower power leads.
    NOTE: If the wires are not long enough, pull extra wire from the wire bundle in the blower compartment.

12. Reconnect the flue pipe, and the pressure switch tubing. Ensure that all wires and the pressure switch tubing is at least one inch from the flue pipe, or any other hot surface.

13. Restore power to furnace.

Counterflow units are shipped with the induced draft blower discharging from the top of the furnace (“Top” as viewed for a counterflow installation).
Vent the furnace in accordance with the National Fuel Gas Code NFPA54/ANSI Z223.1 – latest edition.
WARNING
Never allow the products of combustion, including carbon monoxide, to enter the return ductwork or circulation air supply.

MASONRY CHIMNEYS

WARNING
Possibility of property damage, personal injury or death damaging condensation can occur inside masonry chimneys when a single fan-assisted Category I appliance (80% AFUE Furnace) is vented without adequate dilution air. Do not connect an 80% furnace to a masonry Chimney unless the furnace is common vented with a draft hood equipped appliance or the chimney is lined with a metal liner or Type B metal vent. All installations using masonry chimneys must be sized in accordance with the appropriate venting tables.
If an 80% furnace is common vented with a draft hood equipped appliance, the potential for condensation damage may still exist with extremely cold conditions, long vent connectors, exterior chimneys, or any combination of these conditions. The risk of condensation damage is best avoided by using masonry chimneys as a pathway for properly sized metal liner or Type B metal vent.
Masonry Chimney Termination
A masonry chimney used as a vent for gas fired equipment must extend at least three feet above the highest point where it passes through the roof. It must extend at least two feet higher than any portion of a building within a horizontal distance of 10 feet. In addition, the chimney must terminate at least 3 feet above any forced air inlet located within 10 feet. The chimney must extend at least five feet above the highest connected equipment draft hood outlet or flue collar.

ELECTRICAL CONNECTIONS

WARNING
HIGH VOLTAGE
To avoid risk of electrical shock, wiring to the unit must be polarized and grounded.
WARNING
HIGH VOLTAGE
To avoid personal injury or death due to electrical shock, disconnect electrical power before servicing or changing any electrical wiring.
CAUTION
Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation after servicing.
Wiring Harness
The wiring harness is an integral part of this furnace. Field alteration to comply with electrical codes should not be required. Wires are color coded for identification purposes.
Refer to the wiring diagram for wire routings. If any of the original wire as supplied with the furnace must be replaced, it must be replaced with wiring material having a temperature rating of at least 105°C. Any replacement wiring must be a copper conductor.
115 Volt Line Connections
Before proceeding with electrical connections, ensure that the supply voltage, frequency, and phase correspond to that specified on the unit rating plate. Power supply to the furnace must be NEC Class 1, and must comply with all applicable codes. The furnace must be electrically grounded in accordance with local codes or, in their absence, with the latest edition of The National Electric
Code, ANSI NFPA 70 and/or The Canadian Electric Code CSA C22.1.
Use a separate fused branch electrical circuit containing properly sized wire, and fuse or circuit breaker. The fuse or circuit breaker must be sized in accordance with the maximum overcurrent protection specified on the unit
rating plate. An electrical disconnect must be provided at the furnace location.
Connect hot, neutral, and ground wires as shown in the wiring diagram located on the unit’s blower door. Metal conduit is not considered a substitute for an actual ground wire to the unit.
Line polarity must be observed when making field connections. Line voltage connections can be made through either the right or left side panel. The furnace is shipped configured for a right side electrical connection with the junction box located inside the burner compartment (blower compartment for downflows). To make electrical connections through the opposite side of the furnace, the junction box must be relocated to the other side of the burner (or blower) compartment prior to making electrical connections. To relocate the junction box, follow the steps shown below.
NOTE: Wire routing must not to interfere with circulator blower operation, filter removal, or routine maintenance.
Junction Box Relocation
WARNING
Edges of sheet metal holes may be sharp. Use gloves as a precaution when removing plugs.
WARNING
To prevent personal injury, electrical shock, disconnect electrical power before installing or servicing thus unit.

1. Remove both doors from the furnace.
2. Remove and save the screws holding the junc tion box to the right side of the furnace.
3. Attach the junction box to the left side of the fur nace, using the screws removed in step 2.
4. Check the location of the wiring. Confirm that it will not be damaged by heat from the burners or by the rotation of the fan. Also confirm that wiring location will not interfere with fil ter removal or other maintenance.

IMPORTANT NOTE : To avoid possible equipment malfunction, route the low voltage wires to avoid interference with filter removal or other maintenance.
WARNING
HIGH VOLTAGE
To avoid the risk of injury, electrical shock or death, the furnace must be electrically grounded in accordance with local codes or in their absence, with the latest edition of the National Electric Codes.
To ensure proper unit grounding, the ground wire should run from the furnace ground screw located inside the furnace junction box all the way back to the electrical panel.
NOTE: Do not use gas piping as an electrical ground. To confirm proper unit grounding, turn off the electrical power and perform the following check.

1. Measure resistance between the neutral (white) connection and one of the burners.
2. Resistance should measure 10 ohms or less.

This furnace is equipped with a blower door interlock switch which interrupts unit voltage when the blower door is opened for servicing. Do not defeat this switch.

GAS SUPPLY AND PIPING

The furnace rating plate includes the approved furnace gas input rating and gas types. The furnace must be equipped to operate on the type of gas applied. This includes any conversion kits required for alternate fuels and/or high altitude.
WARNING
To prevent unreliable operation or equipment damage, the inlet gas supply pressure must be as specified on the unit rating plate with all other household gas fired appliances operating.
Inlet gas supply pressures must be maintained within the ranges specified in the following table. The supply pressure must be constant and available with all other household gas fired appliances operating. The minimum gas supply pressure must be maintained to prevent unreliable ignition.
The maximum must not be exceeded to prevent unit overfiring.
NOTE: Do not remove the gas valve inlet plug  before the gas line is installed. Replace if wateror debris has been introduced.

INLET GAS SUPPLY PRESSURE

Natural Gas| Minimum:  4.5″ w.c.| Maximum: 10.0″ w.c.
Propane Gas| Minimum: 11.0″ w.c.| Maximum: 13.0″ w.c.

NOTE: Adjusting the minimum supply pressure below the limits in the above table could lead to unreliable ignition.
Gas input to the burners must not exceed the rated input shown on the rating plate. Overfiring of the fur nace can result in premature heat exchanger failure. Gas pressures in excess of 13 inch es water column can also cause permanent damage to the gas valve.
At all altitudes, the manifold pressure must be within 0.3 inches w.c. of that listed in the Specification Sheet applicable to your model for the fuel used. At all altitudes and with either fuel, the air tempera ture rise must be within the range listed on the furnace nameplate. Should this appliance be converted to LP, refer to the instructions included in the factory authorized LP conversion kit.
High Altitude Derate
High altitude installations may require both a pressure switch and an orifice change. These changes are necessary to compensate for the natural reduction in the density of both the gas fuel and the combustion air at higher altitude.
Clearance in accordance with local installation codes, the requirements of the gas supplier and the manufacturer’s installation instructions.

Gas| Altitude| Kit| Orifice| Manifold Pressure| Pressue Switch Change
---|---|---|---|---|---
High Stage| Low Stage
Natural| 0-5500| None| #45| 3.5″ w.c.| 1.9″ w.c.| None
Propane| LPM-06 GAS VALVE| #55| 10.0″ w.c.| 6.0″ w.c.| None

NOTE: In Canada, gas furnaces are only certified to 4500 feet.
Consult the furnace Specification Sheet for appropriate manufacturer’s kits for propane gas and/or high altitude installations. The indicated kits must be used to insure safe and proper furnace operation. All conversions must be
performed by a qualified installer, or service agency.
Propane Gas Conversion
WARNING
Possible property damage, personal injury or death may occur if the correct conversion kits are not installed. The appropriate kits must be applied to ensure safe and proper furnace operation. All conversions must be performed by a qualified installer or service agency.
This unit is configured for natural gas. The appropriate manufacturer’s propane gas conversion kit must be applied for propane gas installations.
If converting to LP gas, it is recommended that an LPLP0* kit also be installed. The use of this kit will prevent the  furnace from firing when the LP gas supply pressure is toolow to support proper combustion.
Gas Piping Connections
WARNING
To avoid possible unsatisfactory operation of equipment, use the proper size of natural/propane gas piping needed when running pipe from the meter/tank to the furnace. When sizing gas lines, be sure to include all appliances which will operate simultaneously.
The gas piping supplying the furnace must be properly sized based on the gas flow required, specific gravity of the gas, and length of the run. The gas line installation must comply with local codes, or in their absence, with the latest edition of the National Fuel Gas Code, NFPA 54/ANSI Z223.1.
Natural Gas Capacity of Pipe
In Cubic Feet of Gas Per Hour (CFH)

(Pressure 0.5 psig or less and pressure drop of 0.3″ W.C.; Based on 0.60 Specific Gravity Gas)
CFH =
BTUH Furnace Input
Heating Value of Gas (BTU/Cubic Foot)
To connect the furnace to the building’s gas piping, the installer must supply a ground joint union, drip leg, manual shutoff valve, and line and fittings to connect to gas valve.
In some cases, the installer may also need to supply a transition piece from 1/2” pipe to a larger pipe size.
The following stipulations apply when connecting gas piping.

• Gas piping must be supported external to the furnace cabinet so that the weight of the gas line does not distort the burner rack, manifold or gas valve.
• Use black iron or steel pipe and fittings for the building piping.
• Use pipe joint compound on male threads only. Pipe joint compound must be resistant to the action of the fuel used.
• Use ground joint unions.
• Install a drip leg to trap dirt and moisture before it can enter the gas valve. The drip leg must be a minimum of three inches long.
• Use two pipe wrenches when making connection to the gas valve to keep it from turning. The orientation of the gas valve on the manifold must be maintained as shipped from the factory.
• Install a manual shutoff valve between the gas meter and unit within six feet of the unit. If a union is installed, the union must be downstream of the manual shutoff valve, between the shutoff valve and the furnace.
• Tighten all joints securely.
• Connect the furnace to the building piping by one of the following methods:
  – Rigid metallic pipe and fittings.
  – Semi-rigid metallic tubing and metallic fittings. Aluminum alloy tubing must not be used in exterior locations.
  – Use listed gas appliance connectors in accordance with their instructions. Connectors must be fully in the same room as the furnace.
  – Protect connectors and semi-rigid tubing against physical and thermal damage when installed.
  Ensure aluminum-alloy tubing and connectors are coated to protect against external corrosion when in contact with masonry, plaster, or insulation, or subjected to repeated wetting by liquids such as water (except rain water), detergents, or sewage.

Upflow Installations
When the gas piping enters through the side of the furnace, the installer must supply the following fit tings (starting from the gas valve):

• Close nipple.
• 90 degree elbow.
• Straight pipe to reach the exterior of the furnace.

A ground joint union, drip leg, and manual shutoff valve must also be supplied by the installer. In some cases, the installer may also need to supply a transition piece from 1/2” to another pipe size.
When the gas piping enters through the left side of the furnace, the installer must supply the following fittings (starting from the gas valve):

• 90 degree elbow.
• Straight pipe to reach the exterior of the furnace.
• A ground joint union, drip leg, and manual shutoff valve must also be supplied by the installer. In some cases, the installer may also need to supply a transition piece from 1/2 inch to another pipe size.

Counterflow Installations
When the gas piping enters through the left side of the furnace, the installer must supply a straight pipe and a 90 degree elbow to reach the exterior of the furnace.
A ground joint union, drip leg and manual shutoff valve must also be supplied by the installer. In most cases, the installer may also need to supply a transition piece from ½” to another pipe size. When the gas piping enters through the right side of the furnace, the installer must supply the following fittings (starting at the gas valve):

• Close Nipple.
• 90 Degree Elbow.
• Straight Pipe to Reach Exterior of Furnace.

Gas Piping Checks
Before placing unit in operation, leak test the unit and gas connections.
WARNING
To avoid possibility of explosion or fire, never use a match or open flame to test for leaks.
Check for leaks using an approved chloride-free soap and water solution, an electronic combustible gas detector, or other approved testing methods.
CAUTION
To prevent property damage or personal injury due to fire, the following instructions must be performed regarding gas connections, pressure testing, location of shutoff valve and installation of gas piping.
NOTE: Never exceed specified pressures for testing. Higher pressure may cause gas valve failure.
Disconnect this unit and shutoff valve from the gas supply piping system before pressure testing the supply piping system with pressures in excess of 1/2 psig (3.48 kPa). This unit must be isolated from the gas supply system by closing its manual shutoff valve before pressure testing of gas supply piping system with test pressures equal to or less than 1/2 psig (3.48 kPa).
Propane Gas Tanks and Piping
WARNING
If the gas furnace is installed in a basement, an excavated area or confined space, it is strongly recommended to contact a propane supplier to install a gas detecting warning device in case of a gas leak.

• Since propane gas is heavier than air, any leaking gas can settle in any low areas or confined spaces.
• Propane gas odorant may fade, making the gas undetectable except with a warning device.

A gas detecting warning system is the only reliable way to detect a propane gas leak. Rust can reduce the level of odorant in propane gas. Do not rely on your sense of smell. Contact a local propane gas supplier about installing a gas detecting warning system. If the presence of gas is suspected, follow the instructions on Page 3 of this manual.
All propane gas equipment must conform to the safety standards of the National Board of Fire Underwriters, NBFU Manual 58. For satisfactory operation, propane gas pressure must be 10 inch WC at the furnace manifold with all gas appli ances in operation. Maintaining proper gas pressure depends on three main factors:

1. Vaporization rate, depending on temperature of the liquid, and “wetted surface” area of the con tainer or containers.
2. Proper pressure regulation (Two-stage regulation vis recommended for both cost and efficiency).
3. Pressure drop in lines between regulators, and between second stage regulator and the appliance.Pipe size will depend on length of pipe run and total load of all appliances.

Complete information regarding tank sizing for vaporization, recommended regulator settings, and pipe sizing is available from most regulator manufacturers and propane gas suppliers.
Use a pipe thread compound that is approved for natural gas and LP Gas.
Refer to the following illustration for typical propane installations and piping. Propane Gas Piping Charts
Sizing Between First and Second Stage Regulator*
Maximum Propane Capacities listed are based on 2 psig pressure drop at 10 psig setting.
Capacities in 1,000 BTU/hour.

Pipe or Tubing Length, Feet| **Tubing Size, O.D. Type L| Nominal Pipe Size Schedule 40
---|---|---
3/8″| 1/2″| 5/8″| 3/4″| 7/8″| 1/2″| 3/4″
10| 730| 1,700| 3,200| 5,300| 8,300| 3,200| 7,500
20| 500| 1,100| 2,200| 3,700| 5,800| 2,200| 4,200
30| 400| 920| 2,000| 2,900| 4,700| 1,800| 4,000
40| 370| 850| 1,700| 2,700| 4,100| 1,600| 3,700
50| 330| 770| 1,500| 2,400| 3,700| 1,500| 3,400
60| 300| 700| 1,300| 2,200| 3,300| 1,300| 3,100
80| 260| 610| 1,200| 1,900| 2,900| 1,200| 2,600
100| 220| 540| 1,000| 1,700| 2,600| 1,000| 2,300
125| 200| 490| 900| 1,400| 2,300| 900| 2,100
150| 190| 430| 830| 1,300| 2,100| 830| 1,900
175| 170| 400| 780| 1,200| 1,900| 770| 1,700
200| 160| 380| 730| 1,100| 1,800| 720| 1,500
Pipe or Tubing Length, Feet| Tubing Size, O.D. Type L| Nominal Pipe Size Schedule 40**
---|---|---
3/8″| 1/2″| 5/8″| 3/4″| 7/8″| 1-1/8″| 1/2″| 3/4″| 1″| 1-1/4″| 1-1/2″
10| 39| 92| 199| 329| 501| 935| 275| 567| 1,071| 2,205| 3,307
20| 26| 62| 131| 216| 346| 630| 189| 393| 732| 1,496| 2,299
30| 21| 50| 107| 181| 277| 500| 152| 315| 590| 1,212| 1,858
40| 19| 41| 90| 145| 233| 427| 129| 267| 504| 1,039| 1,559
50| 18| 37| 79| 131| 198| 376| 114| 237| 448| 910| 1,417
60| 16| 35| 72| 121| 187| 340| 103| 217| 409| 834| 1,275
80| 13| 29| 62| 104| 155| 289| 89| 185| 346| 724| 1,066
100| 11| 26| 55| 90| 138| 255| 78| 162| 307| 630| 976
125| 10| 24| 48| 81| 122| 224| 69| 146| 275| 567| 866
150| 9| 21| 43| 72| 109| 202| 63| 132| 252| 511| 787
200| 8| 19| 39| 66| 100| 187| 54| 112| 209| 439| 665
250| 8| 17| 36| 60| 93| 172| 48| 100| 185| 390| 590

CIRCULATING AIR

WARNING
Never allow the products of combustion, including carbon monoxide, to enter the return duct work or circulation air supply.
Duct systems and register sizes must be properly designed for the CFM and external static pressure rat ing of the  furnace. Ductwork should be designed in accor dancewith the recommended methods of “Air Conditioning Contractors of America” Manual D.
When the furnace is used in connection with a cooling unit, the furnace should be installed in parallel with or on the upstream side of the cooling unit to avoid condensa tion in the heating element. With a parallel flow arrange ment, the dampers or other means used to control the flow of air must be adequate to prevent chilled air from entering the furnace and, if manually operated, must be equipped with means to prevent operation of either unit unless the damper is in the full heat or cool position.
When the furnace is installed without a cooling coil, it is recommended that a removable access panel be provided in the outlet air duct. This opening shall be accessible when the furnace is installed and shall be of such a size that the heat exchanger can be viewed for visual light inspection or such that a sampling probe can be inserted into the airstream. The access panel must be made to prevent air leaks when the furnace is in operation.
When furnace duct(s) supply air outside the space containing the furnace, a return air duct must terminate in the same space as the supply duct and be sealed to the furnace casing.
When the furnace is heating, the temperature of the return air entering the furnace must be between 55°F and 100°F.
Checking Duct Static
Refer to your furnace rating plate for the maximum ESP (external duct static) rating.
Total external static refers to static pressure created by all components external to the furnace cabinet. Cooling coils, filters, ducts, grilles, registers must all be considered when reading your total external static pressure. The supply duct pressure must be read between the furnace and the cooling coil. This reading is usually taken by removing the “A” shaped block off plate from the end on the coil; drilling a test hole in it and reinstalling the block off plate. Take a duct static reading at the test hole. Tape up the test hole after your test is complete. The negative pressure must be read between the filter and the furnace blower.
Too much external static pressure will result in insufficient air that can cause excessive temperature rise. This can cause limit switch tripping and heat exchanger failure.
To determine total external duct static pressure, proceed as follows:

1. With clean filters in the furnace, use a manometer to measure the static pressure of the return duct at the inlet of the furnace. (Negative Pressure)

2. Measure the static pressure of the supply duct. (Positive Pressure)

3. The difference between the two numbers is .4” w.c.
   EXAMPLE:
   static reading from return duct = -.1” w.c.
   static reading from supply duct = .3” w.c.
   total external static pressure on this system = .4” w.c.
   NOTE: Both readings may be taken simultaneously and read directly on the manometer if so desired. If an air conditioner coil or Electronic Air Cleaner is used in conjunction with the furnace, the readings must also include these components, as shown in the following drawing.

4. Consult proper tables for the quantity of air.

If the total external static pressure exceeds the maximum listed on the furnace rating plate, check for closed dampers, registers, undersized or poorly laid out duct work.Filters – Read This Section Before Installing The Return Air Ductwork Filters must be used with this furnace.
Discuss filter maintenance with the building owner. Filters do not ship with this furnace, but must be provided by the installer. Filters must comply with UL900 or CAN/ULCS111 standards. Damage or repairs due to the installation of the furnace without filters is not covered under the warranty.
Upright Installations
Depending on the installation and/or customer preference, differing filter arrangements can be applied. Filters can be installed in the central return register or a side panel external filter rack kit (upflows), or the ductwork above a downflow furnace. As an alternative, a media air filter or electronic air cleaner can be used as the primary filter.
Horizontal Installations
Filters must be installed in either the central return register or in the return air duct work.
Circulation Air Filters One of the most common causes of a problem in a forced air heating system is a blocked or dirty filter. Circulating air filters must be inspected monthly for dirt accumulation and replaced if necessary. Failure to maintain clean filters can cause premature heat exchanger failure.
A new home may require more frequent replacement until all construction dust and dirt is removed.

^ Larger filters may be used, filters may also be centrally located
¹ = use 2 – 16 X 25 filters and two side returns or 20 X 25 filter on bottom return or a combination of side & bottom if furnace is connected to a cooling unit over 4 tons nominal capacity

Cool Cloud HVAC Phone Application
Actual screens may look different based on the mobile device being used.

This furnace is Bluetooth ready and functions with the Cool Cloud HVAC phone application designed to improve the contractor’s setup / diagnostic experience. Users can see specific model information, review active diagnostic error codes, observe system status during operation, make system menu adjustments, add site visit notes and run system testing of all operational modes (heat / cool / fan) directly from the phone. The phone application is also capable of directly updating the furnace software anytime updates are available. The application will automatically notify the user if updates are available.
NOTE: The software update may take up to 20 minutes to complete.
Quick Start Guide For Communicating Outdoor Units
EXTREMELY IMPORTANT: For all cooling calls the system only requires a single Y input from the thermostat. For all heating calls (including dual fuel applications) the system only requires a single W input from the thermostat. Internal algorithms will control all available cooling and heating stages including dual fuel operation based on these inputs. Any single-stage 24VAC thermostat can be used. For proper operation the thermostat must be setup to control a single-stage AC outdoor unit and to control a single stage gas furnace. The control board does not accommodate an O wire thermostat input (reversing valve signal). If a heat pump is installed, the thermostat should be setup as stated above. Setting the thermostat for the heat pump control or multi stage control may result in incorrect performance.

1. Connect all necessary thermostat wires to the thermostat connector on the furnace control as instructed by the applicable wiring diagrams shown in this section.

2. Connect the 1 & 2 wires between the indoor and outdoor unit for communicating operation.
   NOTE: Verify two stage outdoor units include a 24 VAC transformer (for outdoor control board power) Two stage outdoor units may not behave properly without this 24 VAC transformer.
   Communicating Inverter Air Conditioner or Heat Pump Figure 15

3. Download the Cool Cloud HVAC phone application for charging and to configure/test system operations.

NOTE: When new versions of Bluetooth Communication Software and Furnace Control Software are available, the phone application notifies the user. Software updates are classified as either optional or mandatory and installed by using the phone application. Ensure all mandatory software updates have been installed. Review notes for optional software updates and install if necessary.
NOTE: If an E11 code exists for the inverter system immediately after line voltage is applied (code shown in the Cool Cloud HVAC phone application or displayed on the inverter control), the System Verification Test needs to be completed before any other operation. See the following procedure.

1. Allow the system to remain Idle for 5 minutes.
2. Turn the system verification test on either by using the phone application, or by entering the   menu through the furnace push buttons.
3. Wait for the test to complete.

Charging

1. Inverter units using the Cool Cloud HVAC phone application or control board push button:
   a. Inverter units are charged by setting the menu (Charge Mode) to ON through the furnace control board push buttons or through the Cool Cloud HVAC phone application.
   b. The System will remain in charge mode (high speed) for 60 minutes before timing out.
   c. The installer must manually shut off charge mode once complete.

2. Two-stage outdoor units using the Cool Cloud HVAC application:
   a. Charge the outdoor unit as required using the charging information provided with the outdoor equipment.

Gas Furnace Testing

1. Two-stage Operation using the Cool Cloud HVAC application:
   a. Select the gas heat icon after entering the furnace menus.
   b. Select any value less than 50% for low stage operation and any value greater than 50% for high stage operation.

2. Confirm thermostat heating and cooling calls function properly with equipment.

Quick Start Guide For Non-Communicating Outdoor Units
EXTREMELY IMPORTANT : For two-stage gas heating, the system only needs a single W input. Internal algorithms will control staging of the gas furnace automatically based on the single W input. For non-communicating outdoor unit wiring see instructions below.

1. Use the wiring diagrams below to connect low voltage thermostat wires.
   NOTE: When installing the furnace with a non communicating heat pump wire directly from the “O” terminal on the thermostat to the reversing valve “O” terminal on the non communicating heat pump. See Figure 23 for single stage and Figure 24 for the two stage diagrams. NOTE: The arrow next to the display windowsrefers to the correct orientation for reading characters on the display.

2.  Download the Cool Cloud HVAC phone application.
   NOTE: When new versions of Bluetooth Communication Software and Furnace Control Software are available, the phone application notifies the user. Software updates are classified as either optional or mandatory and installed by using the phone application. Ensure all mandatory software updates have been installed. Review notes for optional software updates and install if necessary.

3. Select the Non-Comm Outdoor Setting menu ( ) using the on board push buttons or the Cool Cloud HVAC phone application. Select 1 AC for single stage Air Conditioners, 1HP for single stage heat pumps, 2 AC for two stage air conditioners and 2 HP for two stage Heat Pumps.

4. Go to the tonnage units menu ( ) and select the tonnage value that corresponds to the desired airflow for the outdoor unit. See the following table.
   NOTE: For two stage non-communicating outdoor units, system will stage airflow automatically for low stage operation. Tonnage Selection| Airflow| Tonnage Selection| Airflow| Tonnage Selection| Airflow| Tonnage Selection| Airflow
   ---|---|---|---|---|---|---|---
   1| 400| 2.| 920| 4.| 1440| 5.| 1960
   1.| 440| 2.| 960| 4.| 1480| 5| 2000
   1.| 480| 3.| 1000| 4.| 1520| 5.| 2040
   1.| 520| 3.| 1040| 4.| 1560| 5.| 2080
   1.| 560| 3.| 1080| 4| 1600| 5.| 2120
   2.| 600| 3.| 1120| 4.| 1640| 5.| 2160
   2.| 640| 3.| 1160| 4.| 1680| 6.| 2200
   2.| 680| 3| 1200| 4.| 1720| 6.| 2240
   2.| 720| 3.| 1240| 4.| 1760| 6.| 2280
   2.| 760| 3.| 1280| 5.| 1800| 6.| 2320
   2| 800| 3.| 1320| 5.| 1840| 6.| 2360
   2.| 840| 3.| 1360| 5.| 1880| 6| 2400
   2.| 880| 4.| 1400| 4.8| 1920| |

NOTE: The system will not provide airflows above the Max Airflow Value.
• 3 Ton Models = 1,400 CFM
• 4 Ton Models = 1,760 CFM
• 5 Ton Models = 2,200 CFM

5. Use the Cool Cloud HVAC phone application to configure/test furnace operations.
   NOTE: The phone application cannot test a noncommunicating outdoor unit. The thermostat will be required for outdoor unit testing.
   Charging
   Charge the outdoor unit as required using the charging information provided with the outdoor equipment.
   Gas Furnace Testing
   a. Two stage operation using the Cool Cloud HVAC application:
   • Select the gas heat icon after entering the furnace menus.
   • Select any value less than 50% for low stage operation and any value greater than 50% for high stage operation.

6. Confirm thermostat heating and cooling calls function properly with equipment.

Quick Start Guide for Gas Heat Only Setup (No Outdoor Unit)
EXTREMELY IMPORTANT: The furnace only requires a single W input for 2 stage gas heat control. Internal algorithms will control staging of the gas furnace automatically.

1. Connect all necessary thermostat wires to the thermostat connector on the furnace control as shown in the following diagram.

2. Download the Cool Cloud HVAC phone application and use it to configure/test furnace operations.
   NOTE: When new versions of Bluetooth Communication Software and Furnace Control Software are available, the phone application notifies the user. Software updates are classified as either optional or mandatory and installed by using the phone application. Ensure all mandatory software updates have been installed. Review notes for optional software updates and install if necessary.
   Gas Furnace Testing
   a. Two-stage Operation using the Cool Cloud HVAC application:
   • Select the gas heat icon after entering the furnace menus.
   b. Select any value less than 50% for low stage operation and any value greater than 50% for high stage operation.

3. Confirm thermostat heating call functions properly with equipment.

Dehumidification
Dehumidification allows the furnace’s circulator blower to operate at a reduced speed during a combined thermostat call for cooling demand with a parallel humidistat. This lower blower speed increases dehumidification of the conditioned air as it passes through the indoor coil. The control board is equipped with a 24 volt dehumidification input (DH) located on the thermostat wiring connector. The terminal can be configured to enable dehumidification when the input is energized or de-energized. When using an external dehumidistat, connect it between the R and DH terminals. If the humidistat closes on humidity rise or the thermostat energizes this terminal when dehumidification is required, set the control board “ ” (Dehum Logic) menu setting to “ ” using the push buttons or Cool Cloud HVAC phone application. If the humidistat opens on humidity rise or the thermostat de-energizes this terminal when dehumidification is required, set the “ ” (Dehum Logic) menu to “ ” using the push buttons or Cool Cloud HVAC phone application.
Auxiliary Alarm Switch
The control is equipped with a 24VAC Aux Alarm to be used for a condensate switch install (designated by CONDENSATE IN/OUT on the control). By default, the connected AUX switch is normally closed and opens when the water level in the evaporator coil base pan reaches an undesirable level. The control responds by displaying an  error code and turning off the outdoor condensing unit.If the AUX switch is detected to be in the closed position for 30 seconds, normal operation resumes and the error message is no longer displayed.
Push Button Menu

The furnace includes three on-board push buttons allowing users to navigate indoor and outdoor system menus. The Right and Left buttons allow the user to scroll through the main menus and to then scroll through available options within specific menus. The Center button is used to enter into a main menu and to then permanently select options within those menus.
NOTE: After scrolling to the desired option within a menu, that option may be flashing on the 7-segment displays. This indicates the option has not been officially selected. Pressing the Center button two times will select that option. The first press will stop the flashing. The second will make the selection official and return you to the main menu.

ACCESSORIES

Optional Field installed Supply Air & Return Air Temperature Sensors
Optional Supply Air Sensor 0130F00933 & Return Air Sensor 0130F00934 are available for purchase from your distributor.If an external humidifier, dehumidifier or ventilator is installed, it may require airflow from the HVAC system to function properly.

1. Make sure the installed 24VAC thermostat is capable of controlling the accessory or accessories.
2. Connect the appropriate accessory control wires to the accessory devices from the thermostat (see thermostat manual for connection and setup instructions).
3. If the thermostat is capable of providing a continuous fan call (G signal) during accessory operation: Make sure to connect the thermostat G terminal to the G terminal on the indoor unit. Setup thermostat to ensure G signal is energized during accessory operation.
4. Select the appropriate fan only airflow for the accessory using the indoor unit push button menus or the Cool Cloud HVAC phone application.
5. Using the thermostat, independently test each accessory in addition to independently testing continuous fan mode.

Ramping Profiles
The variable-speed circulator offers four different ramping profiles. These profiles may be used to enhance cooling performance and increase comfort level. Select ramping profiles on the user menu.

• Profile A (1) provides only an OFF delay of one (1) minute at 100% of the cooling demand airflow.
• Profile B (2) ramps up to full cooling demand airflow by first stepping up to 50% of the full demand for 30 seconds. The motor then ramps to 100% of the required airflow. A one (1) minute OFF delay at 100% of the cooling airflow is provided.
• Profile C (3) ramps up to 85% of the full cooling demand airflow and operates there for approximately 7 1/2 minutes. The motor then steps up to the full demand airflow. Profile C also has a one (1) minute 100% OFF delay.
• Profile D (4) ramps up to 50% of the demand for 1/2 minute, then ramps to 85% of the full cooling demand airflow and operates there for approximately 7 1/2 minutes. The motor then steps up to the full demand airflow. Profile D has a 1/2 minute at 50% airflow OFF delay.

115 Volt Line Connection or Electronic Air Cleaner
WARNING
HIGH VOLTAGE
To avoid personal injury or death due to electrical shock, disconnect electrical power before servicing or changing any electrical wiring.
The accessory load specifications are as follows:

The furnace integrated control module is equipped with a line voltage accessory terminal for controlling power to an optional field supplied electronic air cleaner or any device required to operate in parallel with a circulating fan demand.
To connect an electronic air cleaner using the line voltage EAC terminal:

• Turn OFF power to the furnace before installing any accessories.
• Follow the air cleaner manufacturers’ instructions for locating, mounting, grounding, and controlling accessories. Utilize 1/4” quick connect terminals to make accessory wiring connections to the furnace integrated control module.
• Connect the hot terminal utilized for accessory operation to the EAC terminal and the neutral side of power to NEUTRAL bus on the integrated furnace control or the neutral connection in the furnace junction box.
• All field wiring must conform to applicable codes.
• If it is necessary for the installer to supply additional line voltage wiring to the inside of the furnace, the wiring must conform to all local codes, and have a minimum temperature rating of 105°C.
• All line voltage wire splices must be made inside the furnace junction box.

STARTUP PROCEDURE & ADJUSTMENT

Furnace must have a 115 VAC power supply properly connected and grounded. Proper polarity must be maintained for correct operation. In addition to the following start-up and adjustment items, refer to further information in Operational Checks section.
Furnace Operation
Purge gas lines of air prior to startup. Be sure not purge lines into an enclosed burner compartment. Follow NFPA 54, National Fuel Gas Code for proper purging methods. In Canada, follow approved purging methods in CAN/CSA B149.1-15.
Check for leaks using an approved chloride-free soap and water solution, an electronic combustible gas detector, or other approved method. Verify that all required kits (propane gas, high altitude, etc.) have been appropriately installed.
Furnace Startup

1. Close the manual gas shutoff valve external to the furnace.

2. Turn off the electrical power to the furnace.

3. Set the room thermostat to the lowest possible setting.

4. Remove the burner compartment door.
   NOTE: This furnace is equipped with an ignition device which automatically lights the burner. Do not try to light the burner by hand.

5. Move the furnace gas valve manual control to the OFF position.

6. Wait five minutes then smell for gas. Be sure check near the floor as some types of gas are heavier than air.

7. If you smell gas after five minutes, immediately follow the safety instructions in the Safety Considerations on page 3 of this manual. If you do not smell gas after five minutes, move the furnace gas valve manual control to the ON position.

8. Replace the burner compartment door.

9. Open the manual gas shutoff valve external to the furnace.

10. Turn on the electrical power to the furnace.

11. Adjust the thermostat to a setting above room temperature.

12. After the burners are lit, set the thermostat to desired temperature.

Furnace Shutdown

1. Set the thermostat to the lowest setting. The integrated control will close the gas valve and extinguish flame. Following a 15 second delay, the induced draft blower will be de-energized. After the blower off delay time expires, the blower deenergizes.
2. Remove the burner compartment door and move the furnace gas valve manual control to the OFF position.
3. Close the manual gas shutoff valve external to the furnace.
4. Replace the burner compartment door.

Gas Supply Pressure Measurement

INLET GAS SUPPLY PRESSURE

Natural Gas| Minim um :  4.5″ w.c.| Maxim um : 10.0″ w.c.
Propane Gas| Minim um : 11.0″ w.c.| Maxim um : 13.0″ w.c.

CAUTION
To prevent unreliable operation or equipment damage, the inlet gas supply pressure must be as specified on the unit rating plate with all other household gas fired appliances operating.
The line pressure supplied to the gas valve must be within the range specified below. The supply pressure can be measured at the gas valve inlet pressure tap or at a hose fitting installed in the gas piping drip leg. The supply pressure must be measured with the burners operating.
To measure the gas supply pressure, use the following procedure.

1.  Turn OFF gas to furnace at the manual gas shutoff valve external to the furnace.

2. Connect a calibrated manometer (or appropriate gas pressure gauge) at either the gas valve inlet pressure tap or the gas piping drip leg. See White-Rodgers 36J54 gas valve (Figure 31B) to locate the inlet pressure tap. Run High Fire
   NOTE: The Coolto assist with allst The furnace should be inspected by a qualified installerservice agency at least once per yearbe performed at the beginning of the heating season. This will ensure that all furnace components are in proper working order and that the heating system functions appropriatelyitems. Repair or service as necessary
   NOTE: If using the inlet pressure tap on the WhiteRodgers 36J54 gas valve, then use the 36G/J Valve Pressure Check Kit, Part No. 0151K00000S.

3. Turn ON the gas supply and operate the furnace and all other gas consuming appliances on the same gas supply line.

4. Measure furnace gas supply pressure with burners firing. Supply pressure must be within the range specified in the Inlet Gas Supply Pressure table.
   If supply pressure differs from table, make the necessary adjustments to pressure regulator, gas piping size, etc., and/or consult with local gas utility.

5. Turn OFF gas to furnace at the manual shutoff valve and disconnect manometer. Reinstall plug before turning on gas to furnace.

6. Turn OFF any unnecessary gas appliances stated in step three.

Gas Manifold Pressure Measurement and Adjustment
CAUTION
To prevent unreliable operation or equipment damage, the gas supply pressure must be as specified on the unit rating plate. Only minor adjustments should be made by adjusting the gas valve pressure regulator.
Only small variations in gas pressure should be made by adjusting the gas valve pressure regulator. The manifold pressure must be measured with the burners operating. To measure and adjust the manifold pressure, use the following procedure.

1. Turn OFF gas to furnace at the manual gas shutoff valve external to the furnace.

2. Turn off all electrical power to the system.

3. Outlet pressure tap connections:
   White-Rodgers 36J54 valve: Back outlet pressure test screw (inlet/outlet pressure tap) out one turn (counterclockwise, not more than one turn).

4. Attach a hose and manometer to outlet pressure tap .

5. Turn ON the gas supply.

NOTE: Follow this procedure to test the gas valve pressure at 100% firing rate.

Run High Fire
NOTE: The Cool Cloud phone application be used to assist with all functional tests. See the quick start guide section for details.
The furnace should be inspected by a qualified installer, or service agency at least once per year. This check should be performed at the beginning of the heating season.
This will ensure that all furnace components are in proper working order and that the heating system functions appropriately. Pay particular attention to the following items.
Repair or service as necessary.

NOTE: When converting from natural gas to L.P. consult your distributor for proper conversion kit.

Manifold Gas Pressure

Gas| Range| Nominal
Natural| Low Stage| 1.6 – 2.2″  w.c.| 1.9″ w.c.
High Stage| 3.2 – 3.8″  w.c.| 3.5″ w.c.
Propane| Low Stage| 5.7 – 6.3″  w.c.| 6.0″ w.c.
High Stage| 9.7 – 10.3″ w.c.| 10.0″ w.c.

Gas Input Rate Measurement (Natural Gas Only)
The actual gas input rate to the furnace must never be greater than that specified on the unit rating plate. To measure natural gas input using the gas meter, use the following procedure.

1. Turn OFF the gas supply to all other gas-burning appliances except the furnace.

2. While the furnace is operating at high fire rate, time and record one complete revolution of the gas meter dial, measuring the smallest quantity, usually the dial that indicates 1/2 cu. ft. per revolution. You will use this number to calculate the quantity of gas in cubic ft. if the furnace would consume if it ran steadily for one hour (3600 seconds).

3. If the 1/2 cu. ft. dial was used, multiply your number by two. EXAMPLE: If it takes23 seconds to complete one revolution of the 1/2 ft. dial (23 x 2 = 46). This tells us that at this rate, it would take 46 seconds to consume one cu. ft. of gas. 3600 / 46 = 78.
   This tells us that in one hour, the furnace would consume 78 cu. ft. of gas. The typical value range for 1 cu. ft. of natural gas is around 1000 BTU. Check with your gas utility, if possible. In this example, the furnace is consuming 78,000 BTUH.
   NOTE: The final manifold pressure cannot vary by more than ± 0.3” w.c. for Natural and + 0.5” for LP from the specified setting. Consult your local gas supplier if additional input rate adjustment is required.

4. Turn ON gas to and relight all other appliances turned off in step 1. Be certain that all appliances are functioning properly and that all pilot burners are operating.

Temperature Rise
Temperature rise must be within the range specified on the unit rating plate. An incorrect temperature rise may result in condensing in or overheating of the heat exchanger. An airflow and temperature rise table is provided in the Specification Sheet applicable to your model. Determine and adjust temperature rise as follows:

1.  Operate furnace with burners firing for approximately ten minutes. Ensure all registers are open and all duct dampers are in their final (fully or partially open) position.
2. Place thermometers in the return and supply ducts as close to the furnace as possible. Thermometers must not be influenced by radiant heat by being able to “see” the heat exchanger.
3. Subtract the return air temperature from the supply air temperature to determine the air temperature rise. Allow adequate time for thermometer readings to stabilize.
4. Adjust temperature rise by adjusting the circulator blower speed. Increase blower speed to reduce temperature rise. Decrease blower speed to increase temperature rise. Refer to Startup Procedure and
   Adjustment – Circulator Blower Speeds for speed changing details.

CROSS-HATCHED AREA SUBJECTED TO RADIANT HEAT. DO NOT MEASURE SUPPLY AIR TEMPERATURE IN THIS AREA.

Diagnostics
Accessing the furnace’s diagnostic menu provides access to the last six faults detected by the furnace. Faults are stored most recent to least recent. Any consecutively repeated fault is stored a maximum of three times.
EXAMPLE: A clogged return air filter causes the furnace limit to trip repeatedly. The control will only store this fault the first three consecutive times the fault occurs.
NOTE: It is highly recommended that the fault history be cleared when performing maintenance or servicing the furnace.

NORMAL SEQUENCE OF OPERATION

Power Up
The normal power up sequence is as follows:

• 115 VAC power applied to furnace.
• Integrated control module performs internal checks.
• Integrated control module monitors safety circuits continuously.
• The furnace enters a three minute power up delay to make sure the system is setup properly. During this time thermostat calls will not be recognized.
• Furnace awaits call from thermostat. 7-segment LED’s display while awaiting call from thermostat.

Heating Mode
The normal operational sequence in heating mode is as follows:

• W thermostat contact closes, initiating a call for heat.

• Integrated control module performs safety circuit checks.

• Induced draft blower is energized on high speed for a 15-second prepurge.

• Induced draft blower steps to low speed following prepurge. Low stage pressure switch contacts are closed.

• Igniter warm up begins upon Inducer draft blower step to low speed and presence of closed low stage pressure switch contacts.

• Gas valve opens at end of igniter warm up period, delivering gas to burners and establishing flame.

• Integrated control module monitors flame presence.
  Gas valve will remain open only if flame is detected.

• Based on the furnace internal control algorithms the gas valve and induced draft blower may continue operating on low stage or both will change to high stage. After a power cycle, the first gas heat call will result in high stage operation.

• Circulator blower is energized on heat speed following the selected blower on delay and will begin to ramp up. Electronic air cleaner terminal is energized with circulator blower.

• Furnace is now operating on the specified stage determined by the internal control algorithm.

• Furnace runs, integrated control module monitors safety circuits continuously.

• If the internal algorithm changes the call from low heat to high heat, the integrated control module will immediately switch the induced draft blower, gas valve, and circulator blower to their high stage settings.

• If the internal algorithm changes the call from high heat to low heat, the control will immediately switch the induced draft blower and gas valve to their low stage settings. The circulator blower remains on high heating speed for 30 seconds before switching to the low heat circulating speed.

• The W terminal thermostat contacts open, which ends the call for heat.

• The gas valve closes, extinguishing the flame.

• Induced draft blower is de-energized following a 15 second post purge.

• Circulator blower continues running for the selected heat off delay period. The blower speed during this period depends on the last heat call provided by the thermostat. If the last call for heat was a call for low heat, the air circulator motor will run on low heat speed for the duration of the heat off delay period. If the last call for heat was a call for high heat, the air circulating motor will run on low heat speed for the duration of the heat off delay period. If the last call for heat was a call for high heat, the air cirulating motor will run on the high heating speed for thirty (30) seconds and then switch to the low heating spped for the reminder of the heat off delay period.

• Circulator blower and electronic air cleaner terminal are de-energized.

• Circulator blower shuts off after the heat off delay period expires.

• Furnace awaits next call from thermostat.

OPERATIONAL CHECKS

The burner flames should be inspected with the burner compartment door installed. Flames should be stable, quiet, soft, and blue (dust may cause orange tips but they must not be yellow). Flames should extend directly outward from the burners without curling, floating, or lifting off. Flames must not impinge on the sides of the heat exchanger firing tubes.

SAFETY CIRCUIT DESCRIPTION

WARNING
Do not bypass safety devices.
A number of safety circuits are employed to ensure safe and proper furnace operation. These circuits serve to control any potential safety hazards and serve as inputs in the monitoring and diagnosis of abnormal function.
These circuits are continuously monitored during furnace operation by the integrated control module.
Integrated Control Module
The integrated control module is an electronic device which, if a potential safety concern is detected, will take the necessary precautions and provide diagnostic information through an LED.
Primary Limit
The primary limit control is located on the partition panel and monitors heat exchanger compartment temperatures. It is a normally-closed (electrically), automatic reset, temperature-activated sensor. The limit guards against overheating as a result of insufficient conditioned air passing over the heat exchanger.
Auxiliary Limit
The auxiliary limit controls are located on or near the circulator blower and monitors blower compartment temperatures. They are a normally-closed (electrically), manual-reset sensors. These limits guard against overheating as a result of insufficient conditioned air passing over the heat exchanger.
Rollout Limit
The rollout limit controls are mounted on the burner/manifold assembly and monitor the burner flame. They are normally closed (electrically), manual- reset sensors. These limits guard against burner flames not being properly drawn into the heat exchanger.
Pressure Switches
The pressure switches are normally-open (closed during operation) negative air pressure-activated switches. They monitor the airflow (combustion air and flue products) through the heat exchanger via pressure taps located on the induced draft blower and the coil front cover. These switches guard against insufficient airflow (combustion air and flue products) through the heat exchanger and/or blocked condensate drain conditions.
Flame Sensor
The flame sensor is a probe mounted to the burner/manifold assembly which uses the principle of flame rectification to determine the presence or absence of flame.

TROUBLESHOOTING

Electrostatic Discharge (ESD) Precautions
NOTE: Discharge body’s static electricity before touching unit. An electrostatic discharge can adversely affect electrical components.
Use the following precautions during furnace installation and servicing to protect the integrated control module from damage. By putting the furnace, the control, and the person at the same electrostatic potential, these steps will help avoid exposing the integrated control module to electrostatic discharge. This procedure is applicable to both installed and uninstalled (ungrounded) furnaces.

1. Disconnect all power to the furnace. Do not touch the integrated control module or any wire connected to the control prior to discharging your body’s electrostatic charge to ground.

2. Firmly touch a clean, unpainted, metal surface of the furnace away from the control. Any tools held in a person’s hand during grounding will be discharged.

3. Service integrated control module or connecting wiring following the discharge process in step 2. Use caution not to recharge your body with static electricity; (i.e., do not move or shuffle your feet, do not touch ungrounded objects, etc.). If you come in
   contact with an ungrounded object, repeat step 2 before touching control or wires.

4. Discharge your body to ground before removing a new control from its container. Follow steps 1 through 3 if installing the control on a furnace. Return any old or new controls to their containers before touching any ungrounded object.

Diagnostic Chart
WARNING
HIGH VOLTAGE
To avoid personal injury or death due to electrical shock, disconnect electrical power before performing any service or maintenance.
Refer to the Troubleshooting Chart in the back of this manual for assistance in determining the source of unit operational problems. The 7-segment LED displays will display an error code that may contain a letter and number.
The error code may be used to assist in troubleshooting the unit.

Resetting From Lockout
Furnace lockout results when a furnace is unable to achieve ignition after three attempts during a single call for heat. It is characterized by a non- functioning furnace and an code displayed on the 7-segment display. If the furnace is in “lockout”, it will (or can be) reset in any of the following ways.

1. Automatic reset. The integrated control module will automatically reset itself and attempt to resume normal operations following a one hour lockout period.
2. Manual power interruption. Interrupt 115 volt power to the furnace.
3. Manual thermostat cycle. Lower the thermostat so that there is no longer a call for heat for 1-20 seconds then reset to previous setting.

NOTE: If the condition which originally caused the lockout still exists, the control will return to lockout. Refer to the Troubleshooting Chart for aid in determining the cause.

MAINTENANCE

WARNING
To avoid electrical shock, injury or death, disconnect electrical power before performing any maintenance. If you must handle the igniter, handle with care. Touching the igniter element with bare fingers, rough handling or vibration could damage the igniter resulting in premature failure. Only a qualified servicer should ever handle the igniter.
Annual Inspection
The furnace should be inspected by a qualified installer, or service agency at least once per year. This check should be performed at the beginning of the heating season. This will ensure that all furnace components are in proper working order and that the heating system functions appropriately. Pay particular attention to the following items. Repair or service as necessary.

• Flue pipe system. Check for blockage and/or leakage.
  Check the outside termination and the connections at and internal to the furnace.

• Heat exchanger. Check for corrosion and/or buildup within the heat exchanger passageways.

• Burners. Check for proper ignition, burner flame, and flame signal.

• Wiring. Check electrical connections for tightness and/ or corrosion. Check wires for damage.

• Filters.

FILTERS

CAUTION
To ensure proper unit performance, adhere to the filter sizes given in the Recommended Minimum Filter Size Table or Specification Sheet applicable to your model.
Filter Maintenance
Improper filter maintenance is the most common cause of inadequate heating or cooling performance. Filters should be cleaned (permanent) or replaced (disposable) as required.
Filter Removal
Depending on the installation, differing filter arrangements can be applied. Filters can be installed in either the central return register or a side panel external filter rack (upflow only). A media air filter or electronic air cleaner can be used as an alternate filter. Follow the filter sizes given in the Recommended Minimum Filter size table to ensure proper unit performance.
To remove filters from an external filter rack in an upright upflow installation, follow the directions provided with external filter rack kit.
Horizontal Unit Filter Removal
Filters in horizontal installations are located in the central return register or the ductwork near the furnace.
To remove:

1. Turn OFF electrical power to furnace.
2. Remove filter(s) from the central return register or ductwork.
3. Replace filter(s) by reversing the procedure for removal.
4. Turn ON electrical power to furnace.

Media Air Filter or Electronic Air Cleaner Removal
Follow the manufacturer’s directions for service.
Burners
Visually inspect the burner flames periodically during the heating season. Turn on the furnace at the thermostat and allow several minutes for flames to stabilize, since any dislodged dust will alter the flames normal appearance.
Flames should be stable, quiet, soft, and blue (dust may cause orange tips but they must not be yellow). They should extend directly outward from the burners without curling, floating, or lifting off. Flames must not impinge on the sides of the heat exchanger firing tubes.
Induced Draft and Circulator Blowers
The bearings in the induced draft blower and circulator blower motors are permanently lubricated by the manufacturer. No further lubrication is required. Check motor windings for accumulation of dust which may cause overheating. Clean as necessary.
Flame Sensor (Qualified Servicer Only)
Under some conditions, the fuel or air supply can create a nearly invisible coating on the flame sensor. This coating acts as an insulator causing a drop in the flame sense signal. If the flame sense signal drops too low the furnace will not sense flame and will lock out. The flame sensor should be carefully cleaned by a qualified servicer using steel wool. Following cleaning, the flame sense signal should be as indicated in the Specifications Sheet.
Flue Passages (Qualified Servicer Only)
The heat exchanger flue passageways should be inspected at the beginning of each heating season.

BEFORE LEAVING AN INSTALLATION

• Cycle the furnace with the thermostat at least three times. Verify cooling and fan only operation.
• Review the Owner’s Manual with the homeowner and discuss proper furnace operation and maintenance.
• Leave literature packet near furnace.

REPAIR AND REPLACEMENT PARTS

• When ordering any of the listed functional parts, be sure to provide the furnace model, manufacturing, and serial numbers with the order.
• Although only functional parts are shown in the parts list, all sheet metal parts, doors, etc. may be ordered by description.
• Parts are available from your distributor.

Functional Parts List

MENU OPTIONS

(compressor speed may increase when this feature on) (inverter only)
| Boost mode will operate above this selected temperature. On = boost mode always on (default = 105°F) (inverter only)
| Cooling Airflow Profile setting (default = profile D showas 4)
| Heat Pump compressor lockout temperature. Furnace will act as primary heat source below this temperature.(Default = 45°F)
| Compressor off delay at the beginning and end of a defrost cycle.(default = 30 seconds)
| Cooling Airflow Off Delay Time. (default = 60 seconds)
| Resets all cooling settings to factory default.
| Cooling Airflow On Delay Time (default = 5 seconds)
| Control Firmware Revision Number
| Enable or disable inverter charge mode.
| Select the range that includes the desired compressor RPS for inverter cooling operation. See inverter manual for menu options
| Maximum Compressor RPS for cooling mode. (inverter only)
| Percentage of high stage cooling airflow to run during low stageoperation. (default = 70%)
| Cooling Airflow Trim (default 0%)
| High Cooling Airflow Trim for inverter units. See inverter manual for menu options and defaults
| Intermediate Cooling Airflow Trim for inverter units. See inverter manual for menu options and defaults
| Low Cooling Airflow Trim for inverter units. See inverter manual for menu options and defaults
| Compressor run time between defrost cycles. (default =30 minutes) (2 stage units)
| Enables or disables dehumidification feature in the outdoor unit. (default = Enabled)
| Select “1” to enable dehumidification when the thermostat DH terminal is energized. Select “0” to enable dehumidification when the thermostat DH terminal is de-energized. (default = 1)
| Gas heat operation during defrost. 1 = low heat, 2 (default) = high heat
| View 6 most recent fault codes and Clear Fault Codes if desired (outdoor communicating units)
| Force system into a defrost cycle (inverter units)
| Constant Fan Speed as percent of maximum airflow.
Default = 25%
| Gas Heat Airflow (percentage of maximum system airflow)
| Gas Heat Fan Off Delay (default = 90 seconds)
| Gas Heat Fan On Delay (default = 30 seconds)
| Enables gas heat at 100% for pressure testing during commissioning.
| Percentage of high stage gas heating airflow to run during low stage gas heat operation. (default = 70%)
| Gas Heat Airflow Trim (default = 0%)
| Maximum Compressor Run Time Between Defrost Cycles (default = 120 minutes)
| Heat Pump Heating Airflow Off Delay Time (default = 60 seconds)
| Heat Pump Heating Airflow On Delay Time (default = 5 seconds)
| Select the range that includes the desired compressor RPS for inverter heating operation. See inverter manual for menu options
| Maximum Compressor RPS for Heating Mode (inverter only)
| Reset all heat pump heating settings to factory default.
| Percentage of high stage heat pump heating airflow to run during low stage operation. (default = 70%)
| Heat Pump Indoor Airflow Trim (default = 0%)
| High Heating Airflow Trim for Inverter Units. See inverter manual for menu options and defaults
| Intermediate Heating Airflow Trim for Inverter Units. See inverter manual for menu options and defaults
| Low Heating Airflow Trim for Inverter Units. See inverter manual for menu options and defaults
| View 6 most recent fault codes and clear all fault codes if desired (furnace)
| Restart communications between the indoor and outdoor unit.
| Select the number of stages for the noncommunicating outdoor unit.
Default = OFF meaning no outdoor unit.
| Enable Pump Down Mode
| Resets furnace settings to factory defaults.
| Maxim um Current Option (s ys tem will lim it capacity to percentage of maximum current) (default = 100%)
| Control Shared Data Revision Number
| Resets all outdoor unit settings to factory defaults.
| System Verification Test (inverters only)
| Indoor Airflow for non-communicating outdoor units.
(values based on 400CFM per ton) (default = 3.0 Ton)
| Select Outdoor Unit Elevation (SL=same level, OL = outdoor lower, IL = indoor lower) Default = Outdoor Lower
| 1 = s ys tem will try to s atis fy the therm os tat quickly.
5 (default) = s ys tem will try to s atis fy the therm os tat more slowly.
| Menu is enabled if the CFS m enu is s et to 6. Select thetarget tim e the s ys tem will attem pt to s atis fy the thermostat.
| Menu is enabled if the CFS m enu is s et to 6. Select the percentage past the target time when the system will transition to gas furnace operation during heat mode.
| Menu is enabled if the CFS is s et to 6. (the gas furnace will run during the next heat call if the heat pump fails to s atis fy the cus tom target tim e for this num ber of consecutive cycles) (default = 20 cycles)
| Menu is enabled if the CFS m enu is s et to 6. (if low stage gas heat is able to consecutively satisfy the thermostat under the set target time for this number ofcycles , the s ys tem will trans ition to the heat pum p for primary heating)
| Menu is enabled if the CFS m enu is s et to 6. (this percentage will help determine when switching back to heat pump operation is appropriate. Default = 20%. If target time = 20 minutes, low stage furnace operation m us t s atis fy the therm os tat by les s than 16 m inutes . (target time – 20% default = 16 minutes).

STATUS CODES

TROUBLESHOOTING CHART

data set using memory card.
Normal operation.| | Normal operation.| None
Furnace fails to operate.
Integrated control module LED display provides no signal.| | No 115 power to furnace or no 24 volt power to integrated control module.
Blown fuse or tripped circuit breaker.
Integrated control module is non-functional.| Restore high voltage power to furnace and integrated control module.
Correct condition which caused fuse to open, replace fuse.
Replace non-functional integrated control module.
Furnace fails to operate.| | Circulator blower motor is not running when it should be running.| Tighten or correct wiring connection.
Verify continuous circuit through inductor.
Replace if open or short circuit.
Check circulator blower motor. Replace if necessary.
Furnace fails to operate.| | Integrated control module has lost communications with circulator blower motor.| Tighten or correct wiring connection.
Check circulator blower motor. Replace if necessary
Check integrated control module. Replace if necessary.
Furnace fails to operate.| | Circulator blower motor horse power in shared data set does not match circulator blower motor horse power.| Verify circulator blower motor horse power match
with nameplate, replace if necessary.
Verify shared data set is correct for the specific model, re-populate data using correct memory card if required.
Furnace operates at reduced performance.
Airflow delivered is less than expected.| | Circulator blower motor is operating in a power, temperature, or speed limiting condition.| Check filters for blockage, clean filters or remove obstruction.
Check ductwork for blockage and verify all registers are fully open.
Verify ductwork is appropriately sized for system, resize and/or replace ductwork if necessary.
Furnace fails to operate.| | Circulator blower motor senses a loss of rotorcontrol.
Circulator blower motor senses high current.| Check filters, filter grille, registers, duct system and equipment inlet/outlet for blockage, make necessary corrections and retest.
Furnace fails to operate.| | Circulator blower motor fails to start 10 consecutive times.| Check circulating blower for obstructions.
Repair or replace blower motor or wheel as required.
Check circulating blower shaft for proper rotation.
Furnace fails to operate.| | Circulator blower motor shuts down for over or under voltage condition.
Circulator blower motor shuts down due to over temperature condition on power odule.| Check voltage to furnace and verify within ameplate specified range.
Furnace fails to operate.| | Circulator blower motor lacks information to operate properly.
Motor fails to start 40 consecutive times.| Check for locked rotor condition.
Check integrated control module and verify it is populated with the correct shared data.
Furnace operates at reduced performance or operates on low stage when high stage is expected.| | Airflow is lower than demanded.| Check filters for blockage, clean filters or remove obstruction.
Check ductwork for blockage and verify all registers are fully open.
Verify ductwork is appropriately sized for system, resize as necessary.
Furnace fails to operate.| | Grounding fault Poor neutral connection.| Verify neutral wire connection to furnace & continuity to ground source.
Furnace fails to operate.| | Open roll out switch.| Check for correct gas pressure.
Check for correct burner alignment.
Check for and correct burner restriction.
External return air temperature reading not visible on CoolCloud app.| | Return Air Temperature Sensor Circuit is Open (External).| NOTE: Allow time as the control may take up to 90 seconds to detect sensors.
Verify that the sensor probe is plugged in all the way.
erify that the sensor probe connector is properly crimped.
Verify that resistance across the sensor probe is 10kΩ at 77°F. Resistance is lower at temperatures higher than 77°F. Resistance is higher at temperatures lower than 77°F. Replace PCB.
External return air temperature reading not visible on CoolCloud app.| | Return Air Temperature Sensor Circuit is Shorted (External).| Check sensor probe terminals & conductors for electrical short.
Check PCB connector for shorts if sensor short error
reported when sensor probe is not plugged in. Replace PCB.
Supply air temperature reading not visible on CoolCloud app.| | Supply Air Temperature Sensor Circuit isOpen (External).| NOTE: Allow time as the control may take up to 90 seconds to detect sensors.
Verify that the sensor probe is plugged in all the way.
Verify that the sensor probe connector is properly crimped.
Verify that resistance across the sensor probe is  0kΩ at 77°F.
Replace PCB.
Supply air temperature reading not visible on CoolCloud app.| | Supply Air Temperature Sensor Circuit is Shorted (External).| Check sensor probe terminals & conductors for electrical short.
Check PCB connector for shorts if sensor short error reported when sensor probe is not plugged in.
Replace PCB.
Onboard return air temperature reading not visible on CoolCloud app.| | Onboard return air temperature sensor is unplugged.| Power cycle the furnace, the control may take up to 90 seconds to detect sensors.
Check PCB for any visible electrical or mechanical damage to onboard sensor (R311).
Replace PCB.
Onboard return air temperature reading not visible on CoolCloud app.| | Onboard return air temperature sensor is shorted.| Power cycle the furnace, the control may take up to 90 seconds to detect sensors.
Ensure there are no foreign objects on the PCB that could cause an electrical short at onboard sensor (R311).
Replace PCB.
Furnace fails to operate.| | Data not yet on network.| Populate shared data set using memory card.
Operation different than expectedor no operation.| | Invalid memory card data.| Verify shared data set is correct for the specific model.
Re-populate data using correct memory card if required.
Furnace fails to operate| | Furnace lockout due to an excessive number of ignition“retries” (3 total) Failure to establish flame Loss of flame after establishment| Locate and correct gas interruption Replace or realign igniter Check flame sense signal, clean sensor if coated or oxidized Check flue piping for blockage, proper length, elbows, and termination
Verify proper induced draft blower performance
Furnace fails to operate| | Low stage pressure switch circuit is closed at starheating cycle
Low stage pressure contacts sticking Short in pressure switch circuit wiring| Replace low stage pressure switch Repair short in wiring
Induced draft blower continuously with no furnace operation| | Low stage pressure switch circuit is not closed
Pressure switch hose blocked pinched, or connected improperly
Blocked flue or weak induced draft blower Incorrect pressure switch set point or malfunctioning switch contacts
Loose or improperly connected wiring| Inspect pressure switch hose, repair/replace if necessary Inspect flue piping for blockage, proper length, elbows, and termination
Check induced draft blower performance, correct as necessary
Check pressure switch operation, replace as needed Tighten or correct wiring connection
Circulator blower runs continuously with no furnace operation| | Primary limit circuit is open
Insufficient conditioned air over the heat exchanger
Blocked filters, restrictive ductwork, improper circulator
blower speed, or failed circulator blower motor
Loose or improperly connected wiring in high limit circuit| Check filters and ductwork for blockage
Clean filters or remove obstruction
Check circulator blower speed and performance
Correct speed or replace blower motor if necessary
Tighten or correct wiring connection
Induced draft blower and circulator blower runs continuously No furnace operation| | Flame sensed with no call for heat
Short to ground in flame sense circuit
Lingering burner flame
Slow closing gas valve| Correct short at flame sensor or in flame sensor wiring
Check for lingering or lazy flame
Verify proper operation of gas valve
No furnace operation| | Open fuse
Short in low voltage wiring| Replace fuse
Locate and correct short in low voltage wiring
Normal furnace operation| | Flame sense micro amp signal is low
Flame sensor is coated/oxidized
Flame sensor incorrectly positioned in burner flame
Lazy burner flame due to improper gas pressure or combustion air| Clean flame sensor if coated or oxidized
Inspect for proper flame sensor alignment
Compare current gas pressure to rating plate and adjust as needed
Furnace fails to operate| | Problem with igniter circuit
Improperly connected or shorted igniter
Poor unit ground
Igniter relay fault on integrated control module| Check and correct wiring from integrated control module to igniter
Diagnose and replace shorted igniter as needed
Verify and correct unit ground wiring if needed
Check igniter output from control, replace if necessary
Furnace fails to operate on high stage; furnace operates normallyon low stage Induced draft blower operating| | High stage pressure switch circuit is closed at start of heating cycle
High stage pressure switch contacts sticking
Shorts in pressure switch circuit wiring| Diagnose and replace high stage pressure switch if needed
Repair short in wiring
Furnace fails to operate on high stage; furnace operates normally on low stage Induced draft blower operating| | High stage pressure switch circuit is not closed| Inspect pressure switch hose, repair/replace if necessary
Inspect flue for blockage, proper length, elbows, and
termination
Check induced draft blower performance, correct as necessary
Tighten or correct wiring connection
Furnace fails to operate| | Polarity of 115 volt AC is reversed
Poor unit ground| Correct polarity, check and correct wiring if necessary
Verify proper ground, correct if necessary
Furnace fails to operate| | Gas valve is not energized when it should be
External gas valve error| Check wiring in gas valve circuit
Replace integrated control board
Furnace fails to operate| | Gas valve is energized when it should not be
Internal gas valve error| Check wiring in gas valve circuit
Replaced integrated control board
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WIRING DIAGRAM

WARNING
HIGH VOLTAGE!
DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT.
MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.

START-UP CHECKLIST

THIS PAGE IS INTENTIONALLY LEFT BLANK

CUSTOMER FEEDBACK
We are very interested in all product comments.
Please fill out the feedback form on one of the following links:
Goodman® Brand Products: (http://www.goodmanmfg.com/about/contact-us).
Amana® Brand Products: (http://www.amana-hac.com/about-us/contact-us).
You can also scan the QR code on the right for the product brand you purchased to be directed to the feedback page.

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<https://www.goodmanmfg.com/about/contact-us>

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<http://www.amana-hac.com/about-us/contact-us>  

PRODUCT REGISTRATION
Thank you for your recent purchase. Though not required to get the protection of the standard warranty, registering your product is a relatively short process, and entitles you to additional warranty protection, except that failure by California and Quebec residents to register their product does not diminish their warranty rights.
The duration of warranty coverages in Texas differs in some cases.
For Product Registration, please register as follows:
Goodman® Brand products: (https://www.goodmanmfg.com/product-registration).
Amana® Brand products: (http://www.amana-hac.com/product-registration).
You can also scan the QR code on the right for the product brand you purchased to be directed to the Product Registration page.

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<https://www.goodmanmfg.com/product-registration>

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<http://www.amana-hac.com/product-registration>  

IOG-2023E~IOG-2023E~072022~6
Our continuing commitment to quality products may mean a change in specifications without notice.
19001 Kermier Rd. Waller, TX 77484
www.goodmanmfg.com
www.amana-hac.com
© 2019-2022 Daikin Comfort Technologies Manufacturing, L.P.
is a registered trademark of Maytag Corporation or its related companies and is used under license.
All rights reserved.

Documents / Resources

| Goodman MVC80 Gas Furnace [pdf] Instruction Manual
MVC80 Gas Furnace, MVC80, Gas Furnace, Furnace
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References

• Quality, Durable Heating & Air Conditioning Systems From Amana
• Contact Amana Heating & Air Conditioning
• Register Your Amana Heating And Cooling Equipment Here
• Air Conditioning and Heating Systems| HVAC | Goodman
• Contact Us | Goodman Manufacturing
• Silicon Labs
• Warranty Registration | Register Your Goodman HVAC Product

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