Thermo Pride GMD1-80N Installation And Service Manual
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Thermo Pride GMD1-80N Installation And Service Manual

Gas-fired furnace models down flow & direct vent (sealed combustion)
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DOWN FLOW & DIRECT VENT (SEALED COMBUSTION)
MODELS: GMD1-80N
INSTALLATION AND SERVICE MANUAL
For installation in:
1. Manufactured Homes
2. Modular Homes/Buildings
3. Site Constructed—Residential (Single Story Dwellings)
Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this
or any other appliance.
• 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.
:
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.
: Improper installation, adjustment, alteration, service, or maintenance can cause
injury or property damage. Refer to this manual. For assistance or additional information, consult
a qualified installer, service agency, or fuel supplier.
: Do not use this appliance if any part has been underwater. Immediately call a
qualified service technician to inspect the appliance and to replace any part of the electrical or
control system that has been underwater.
PLEASE READ THESE INSTRUCTIONS PRIOR TO INSTALLATION, INITIAL FIRING, AND BEFORE
PERFORMING ANY SERVICE OR MAINTENANCE. THESE INSTRUCTIONS MUST BE LEFT WITH THE USER
AND SHOULD BE RETAINED FOR FUTURE REFERENCE BY QUALIFIED SERVICE PERSONNEL.
MG-505
ECN 4501-MA
GAS-FIRED FURNACE

FOR YOUR SAFETY

WHAT TO DO IF YOU SMELL GAS
THERMO PRODUCTS, LLC.
POST OFFICE BOX 217
NORTH JUDSON, IN 46366
PHONE: (574) 896-2133
:
MADE IN USA

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Summary of Contents for Thermo Pride GMD1-80N

  • Page 1: For Your Safety

    GAS-FIRED FURNACE DOWN FLOW & DIRECT VENT (SEALED COMBUSTION) MODELS: GMD1-80N INSTALLATION AND SERVICE MANUAL For installation in: 1. Manufactured Homes 2. Modular Homes/Buildings 3. Site Constructed—Residential (Single Story Dwellings) Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.

  • Page 2: Safety Section

    0.05 inch water column. Do not obstruct any return air openings, including the return grille on the furnace. To do so may cause the furnace to activate the high limit and shut down or it may cause asphyxiation.
  • Page 3 1/2 PSIG or 14.0 inches W.G. The furnace can be isolated from the gas supply by closing its manual shut off valve at test pressures equal to or less than 1/2 PSIG or 14.0 inches W.G.
  • Page 4 All installations and services must be performed by qualified service personnel. This page and the following page contain reproductions of the various warning and instruction labels placed on the Thermo Pride Gas Furnace. Please read and comply with the contents of these labels.
  • Page 5 All installations and services must be performed by qualified service personnel.

  • Page 6: Table Of Contents

    I. ELECTRICAL WIRING J. PROPANE CONVERSION K. INITIAL START UP L. ADJUSTMENT OF BTU INPUT RATE M. BURNER ADJUSTMENT N. SETTING TEMPERATURE RISE O. FURNACE CHECKOUT PROCEDURE INSTALLER’S INSTRUCTIONS TO USER STARTING THE UNIT A. SEQUENCE OF OPERATIONS VII. TROUBLESHOOTING VIII.

  • Page 7: General Instructions And Clearances

    2. Any reference to L.P. or Propane gas in this manual, any other labels, or markings on this furnace is to be construed to be propane HD-5. A commercial grade of liquefied petroleum gases composed of a minimum of 90 percent liquid propane (C8H8).
  • Page 8 This heating appliance must be installed with clearances to combustible material surfaces of not less than the minimum distances given below. Also, allow ample clearances for servicing the furnace for easy access to the air filter, blower assembly, burner assembly, controls, and vent connections.

  • Page 9: Furnace Specifications

    COTTAGE BASE: WIDTH – 18-3/16 IN., DEPTH - 24¼ IN., HEIGHT – 14 IN. FILTER QUANTITY & SIZE: 1 – 18” x 24 “ APPROXIMATE SHIPPING WEIGHT: 165 LBS. PRODUCT LISTED UNDER ETL FILE NUMBER – III. FURNACE SPECIFICATIONS GMD1-80 80,000 65,000 2.45...
  • Page 10 MANUFACTURER: MORRISON PRODUCTS, INC. BLOWER MODEL: 10-9, DIRECT DRIVE NOMINAL MOTOR POWER OUTPUT (HORSEPOWER): 1/3 TYPICAL AIRFLOW @ SPECIFIED EXTERNAL STATIC PRESSURES (SCFM @. IN.W.G.): ALL SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE. BLOWER DATA ESP (IN W.C.) LOW SPEED: MEDIUM LOW SPEED: MEDIUM HIGH...

  • Page 11: Installation

    4-inch diameter vent collar exiting the furnace, or 12.5 square inches. Maximum chimney sizes and acceptable installation practices are referenced in the following publication. When installing the GMD1-80N, refer to Appendix G of the latest edition of the installation standard NFPA 54, National Fuel Gas Code.
  • Page 12 Combustible Floor Base Model: 70-BASE Figure 1A Cottage Base Model: 01COT-BASE Figure 1B Coil Cabinet Model: CE111S Figure 1C...

  • Page 13: Base Installation

    All installations and services must be performed by qualified service personnel. D. BASE INSTALLATION 1. Combustible Floor Base Model: 70-BASE Referring to Figure 1A, for applications using a combustion air channel and a supply air duct, use the base as a template to mark the floor opening locations. See Figure 2 for cutout locations.

  • Page 14: Cottage Base Model: 01Cot-Base

    All installations and services must be performed by qualified service personnel. If the combustion air passageway cannot terminate outside of the skirting or enclosure, a permanent opening with a minimum of 50 square inches of unobstructed infiltration (free area) for ventilation air must be provided for adequate combustion.

  • Page 15: Alcove Installation

    All installations and services must be performed by qualified service personnel. ?CAUTION: A permanent opening with a minimum of 50 square inches of unobstructed infiltration (free area) for ventilation and combustion air must be provided to the interior of the structure. Additional make-up air may need to be supplied to the interior of the structure to compensate for exhaust fans, appliances, or vents, which consume air from the interior of the structure.

  • Page 16: Closet Installation

    Do not obstruct any return air openings, including the return grille on the furnace. To do so may cause the furnace to activate the high temperature limit and shutdown, or it may cause asphyxiation. 3. The cross-sectional area of the return air grille leading into the closet (when located in the floor or ceiling) shall not be less than 250 square inches.

  • Page 17: Combustion Air

    The 70-base/coil cabinet is shipped with a combustion air duct that must be installed in the bottom of the base enclosure, before the furnace is installed. This 2-inch by 7-inch duct is shipped in two pieces. High temperature silicone sealant should be applied to both vertical seams, before it is snapped together with all four flanges on the same end.
  • Page 18 Optional combustion air- a 4” round duct may be used by connecting a 3 x 4 reducer to the 3” flex duct supplied with the furnace. Figure 6...

  • Page 19: Gas Piping

    1/2 PSIG (13.9 inches W.G.). The furnace can be isolated from the gas supply by closing the manual gas shutoff valve serving the appliance at test pressures equal to, or less than, 1/2 PSIG or (13.9 inches W.G.).

  • Page 20: Electrical Wiring

    1. Electrical Branch Supply Circuit Route all electrical wiring to the left side of the furnace. The power supply circuit to the furnace must be installed and grounded in accordance with the provisions of the National Electrical Code, ANSI/NFPA-70-1999, or latest edition, and all local codes having jurisdiction.
  • Page 21 If the heat anticipator is set too high, the furnace may delay activation of a heating cycle for too long. If the heat anticipator is set too low, the furnace may cycle too frequently. Either condition may not provide optimal comfort to the homeowner.

  • Page 22: Propane Conversion

    J. PROPANE CONVERSION Parts are included with this furnace to convert from natural to propane gas. See table 1 This conversion kit shall be installed by a qualified service agency in accordance with the manufacturer's instructions and all applicable codes and requirements of the authority having jurisdiction.
  • Page 23 : The gas supply shall be shut off prior to disconnecting the electrical power before proceeding with the conversion. 1. Shut off gas to the furnace at the main manual gas shut off valve and power to the furnace at the disconnect switch.
  • Page 24 : The regulator of the gas valve will not function properly if this hose connection is not made. 11. Reconnect the furnace to the gas supply. 12. Refer to initial start-up and operating instructions for test fire and burner adjustments.

  • Page 25: Initial Start Up

    2500 BTU per cubic foot and a specific gravity of 1.55. The rating label inside the furnace vestibule will specify which gas your furnace is orificed for. If the furnace is installed at an altitude that is more than 2,000 feet above sea level,...
  • Page 26 If using the above example, the furnace is a GMD1-80N model and the input rate is 78,678 BTU/hr. The input rate would be acceptable because it was within + 2% of the listed input of 80,000.

  • Page 27: Burner Adjustment

    Replace screw (cap) when adjustment is complete. The correct input can be assumed if the furnace manifold pressure is the same as that shown on the rating label if a gas meter is not available for natural gas or the unit is installed on an unmetered propane gas supply.

  • Page 28: Setting Temperature Rise

    Figure 9 N. SETTING TEMPERATURE RISE The GMD1-80N is designed and wired at the factory for a heating blower speed that should result in an approximate temperature rise of 70°F. The blower motor is wired on medium low speed for heating mode. The temperature rise through the furnace may vary depending on the duct system, elevation, heating value, etc.
  • Page 29 Specifically the following should be checked: With furnace in normal heating operation, check to make certain blower will start and stop automatically under control of integrated fan control. 1. Check safety limit control as follows: a.

  • Page 30: Installer's Instructions To User

    After completing the installation, the installer shall inform and/or demonstrate to the homeowner: The location of all the instructions in the furnace must be kept along with instructions for any accessories in the plastic pouch near the furnace. The location and use of the manual gas shut off valve and furnace electrical disconnect switch.

  • Page 31: Starting The Unit

    A. SEQUENCE OF OPERATIONS AT ANY TIME THE GAS VALVE IS NOT ENERGIZED START START TRIAL FOR IGNITION VI. STARTING THE UNIT CONTINUOUS SAFE OPERATION CHECK IF FLAME SIMULATION CONDITION PRESENT OR ROLL-OUT SWITCH OPENS, SYSTEM ENERGIZES INDUCER FAN FOR 15 SECONDS AND CIRCULATOR BLOWER AT HEATING SPEED UNTIL SITUATION CORRECTION THERMOSTAT CALLS FOR HEAT, CONTACTS CLOSE...
  • Page 32 IF SYSTEM IS IN LOCKOUT, THE MODULE WILL RESET ITSELF AFTER 60 MINUTES OR MAY BE MANUALLY RESET BY INTERRUPTING THE POWER TO THE FURNACE AT THE DISCONNECT OR INTERRUPTING THE CALL FOR HEAT AT THE THERMOSTAT. IF THIS DOES NOT RESTART THE SYSTEM, REFER TO THE TROUBLESHOOTING SECTION OF THIS MANUAL.

  • Page 33: Troubleshooting

    When testing electrical equipment, always follow standard electrical procedures and precautions. 1. Check for line voltage (110-120VAC) to the furnace. If there is no line voltage applied to the furnace, check that disconnecting switch is “on”, fuses or circuit breakers have not blown or tripped.
  • Page 34 DIAGNOSTIC FEATURES : Power must be disconnected before servicing. The 50A65-143 control continuously monitors its own operation and the operation of the system. If a failure occurs, the LED will indicate a failure code as shown below. If the failure is internal to the control, the light will stay on continuously. In this case, the entire control should be replaced, as the control is not field-repairable.
  • Page 35 THE SYSTEM IS STARTED BY SETTING THE THERMOSTAT TO CALL FOR HEAT. THE FOLLOWING SHOULD HELP ESTABLISH THE TYPE OF MALFUNCTION OR DEVIATION FROM THE NORMAL OPERATION. TO USE THIS DIAGRAM, FOLLOW THE INSTRUCTIONS IN THE BOXES. TURN THERMOSTAT TO CALL FOR HEAT DOES THERMOSTAT MAKE CONTACT? IS ROOM TEMPERATURE BELOW THERMOSTAT...
  • Page 36 IS THERE LINE VOLTAGE ACROSS INDUCER POWER TERMINALS "IND" & "IND N" AT THE INTEGRATED CONTROL? CHECK WIRING TO INDUCER AND IF OK, REPLACE INDUCER ASSEMBLY. IS THERE LINE VOLTAGE DOES THE HOT ACROSS HOT SURFACE SURFACE IGNITOR ENERGIZE "IGN" & "IGN N" AT THE AND GLOW? INTEGRATED CONTROL? CHECK WIRING TO HOT...
  • Page 37 AFTER GAS VALVE OPENS, DO THE BURNERS IGNITE? DO BURNERS STAY LIT PAST PROOF OF FLAME CHECK? DOES THE INTEGRATED CONTROL ENERGIZE THE CIRCULATING AIR BLOWER AFTER THE 45 SECOND TIME DELAY? DOES THE CIRCULATING AIR FAN COME ON WHEN ENERGIZED? MEASURE MANIFOLD PRESSURE.
  • Page 38 All installations and services must be performed by qualified service personnel. DOES SYSTEM RUN UNTIL THERMOSTAT IS SATISFIED? DOES BURNER SHUT OFF WHEN THERMOSTAT IS SATISFIED? DOES THE CIRCULATING AIR BLOWER TURN OFF AFTER THERMOSTAT IS SATISFIED WITHIN 120 SECONDS? TROUBLESHOOTING COMPLETE.

  • Page 39: Dealer Maintenance

    ? ? ? ? WARNING: Personal injury or property damage could result from repair or service of this furnace by anyone other than a qualified heating contractor. Only the homeowner/user routine maintenance described in the Users Information Manual may be performed by the user.

  • Page 40: Inspecting The Venting System

    IMPORTANT: Some motors are permanently lubricated and should not be oiled. See motor nameplate for specific instructions. H. EXTENDED SHUTDOWN If this furnace is shut down or off for an extended period of time, several steps can be taken to help insure a smooth and reliable start. ON SHUT DOWN: 1.
  • Page 41 9. Set the room thermostat above room temperature. 10. Open all shutoff valves in the gas supply line. 4. Turn “on” the main power at the disconnecting switch and at the furnace power switch to start the inducer. 5. Follow the “BURNER OPERATION AND ADJUSTMENT” procedure in Section L.

  • Page 42: Users Information Section

    IX. USER INFORMATION SECTION A. WARNINGS AND CAUTIONS: If you suspect there is a problem with the furnace, pertaining to the venting system or any other related problem, immediately contact a qualified service agency. If a service agency is not available, contact your fuel supplier.

  • Page 43: Component Locations

    B. COMPONENT LOCATIONS The following diagram shows a typical furnace installation and typical position of the components referenced in these instructions. C. INSPECTION AREAS IMPORTANT: For safe operation it is the responsibility of the owner and/or user that the burner, chimney/vent pipe, heat exchanger and controls should be inspected every year by a qualified heating contractor.

  • Page 44: Filter Location And Cleaning

    Allow the filter to air dry before reinstalling it in the furnace. Cleaning the air filter frequently may prevent airborne contaminants from going through the furnace and depositing in the furnace, duct system, and interior of the building.

  • Page 45: Appendix A. Replacement Parts List

    All installations and services must be performed by qualified service personnel. APPENDIX A. REPLACEMENT PARTS LIST...
  • Page 46 All installations and services must be performed by qualified service personnel.

  • Page 47: Appendix B - Wiring Diagram

    All installations and services must be performed by qualified service personnel. APPENDIX B – WIRING DIAGRAM...

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