Related Manuals for Goodman GMN SERIES
Summary of Contents for Goodman GMN SERIES
- Page 1 INSTALLATION & OPERATING INSTRUCTIONS for GMN SERIES GAS FURNACES (PATENT PENDING) Goodman Manufacturing Company, L.P. IO-554 1501 Seamist, Houston, Texas 77008 11/93...
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Page 2: Table Of Contents
INDEX Page Typical Upflow Installation Typical Downflow Installation General Information Clearances - Accessibility Changing Orientation of Vent Blower Converting Furnace To Downflow Configuration Combustion/Ventilation Air Supply 5 - 6 Venting 6 - 7 Converting Furnace To Propane Gas Supply and Piping Circulating Supply Air and Return Air 8 - 9 Electrical Connection... -
Page 3: Typical Upflow Installation
TYPICAL UPFLOW INSTALLATION VENTILATION / COMBUSTION AIR See pages 8 & 9 SUPPLY AIR See pages 14 & 15 VENTING See pages 10 - 12 and Venting Tables GAS PIPING See pages 13 & 14 ELECTRICAL RETURN AIR CONNECTIONS See pages 14 & 15 See page 16... - Page 4 TYPICAL DOWN FLOW INSTALLATION COMBUSTION / VENTILATION AIR See pages 8 & 9 RETURN AIR See pages 14 & 15 ELECTRICAL CONNECTIONS See page 16 VENTING See pages 10 - 12 GAS SUPPLY and Venting Tables See pages 13 & 14 SPECIAL BASE See page 6 SUPPLY AIR...
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Page 5: General Information
CAUTION: TO ENSURE PROPER INSTALLATION AND OPERATION OF THIS PRODUCT, COMPLETELY READ AND UNDERSTAND THESE INSTRUCTIONS PRIOR TO ATTEMPTING TO ASSEMBLE, INSTALL, MAINTAIN OR REPAIR. GENERAL INFORMATION INSTALLATION: In the USA this furnace should be installed in accordance with the latest edition of the American National Standard Z223.1 booklet entitled “National Fuel Gas Code”... - Page 6 ACCESSIBILITY CLEARANCE, WHERE GREATER, SHOULD TAKE PRECEDENCE OVER MINIMUM FIRE PROTEC- TION CLEARANCE. A gas-fired furnace for installation in a residential garage must be installed so that the burner(s) and the ignition source are located not less than 18" above the floor and is located or protected to avoid physical damage by vehicles. An upflow gas-fired furnace must not be installed directly on carpeting, tile or other combustible material other than wood flooring.
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Page 7: Changing Orientation Of Vent Blower
CHANGING ORIENTATION OF VENT BLOWER This furnace is shipped from the factory in the upflow configuration with the vent connection on the left side. It can be easily converted to right side venting following the instructions below : Electrical and Gas Supply must be "OFF" before attempting any service. -
Page 8: Converting Furnace To Downflow Configuration
CONVERTING FURNACE TO DOWNFLOW CONFIGURATION Step 8 Replace Control Access Panel and reconnect Power Sup- ply. Step 1 Disconnect the Power Supply Step 2 Rotate the quarter turn fasteners (items 1, page 7) 90° to release the Control Access Panel (item 2, page 7). Step 3 Relocate Pressure Switch (item 7), from Heat Shield (item 5) to Blower Deck (item 8) for Downflow conversion. - Page 9 1.) The passageways that supply combustion/ventilation air must not be obstructed to prevent flow of air to the mechanical room. Extra care is to be used to prevent blockage of the ducts due to insulation, as may occur in an attic. 2.) As outlined in the Figures 1, 2, and 3 the size of the combustion and ventilation air ducts depend upon where the source of the air is located.
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Page 10: Venting
VENTING GENERAL INSTRUCTIONS: The following instructions are intended for use by fully qualified installation or service technicians. Education of the user as to the importance of venting inspection and annual maintenance by a qualified service technicians should be stressed by the heating contractor at the earliest practical time. - Page 11 PROTECTION FROM FREEZING The vent pipe must be properly insulated if there is any chance of condensate freezing inside the pipe, particularly when the pipe passes through an UNCONDITIONED SPACE or is exposed to the exterior. For exterior use, a minimum of 1 inch thick closed cell foam insulation is recommended.
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Page 12: Venting
the furnace, resulting in overflow of condensate, in the event of pump failure. HORIZONTAL THROUGH THE WALL VENTING INSTRUCTIONS The furnace may be vented horizontally through an exterior wall, using all applicable instructions under “Vent Pipe Installation” together with these additional requirements. See illustration below. ALL HORIZONTAL VENT INSTALLATION MUST BE MADE IN ACCORDANCE WITH THESE INSTRUCTIONS. -
Page 13: Converting Furnace To Propane
CONVERTING FURNACE TO PROPANE WARNING: This furnace was equipped at the factory for use with NATURAL GAS. Propane conversion, if required, must be performed by a qualified service technician experienced in performing this type of conversion. If conversion to Propane is required, all instructions included with the factory authorized conversion kit must be followed. -
Page 14: Circulating Supply Air And Return Air
Check both manifold pressure (using the 1/8" NPT tap located on the gas valve) and service pressure (using the 1/8" NPT tap as shown in the drawing above). GAS PIPE CAPACITY TABLE (CU. FT./HR) Capacity of gas pipe of different diameters and length in cu. ft. per hr. with pressure drop of 0.3 in. and specific gravity of 0.60 (natural gas). - Page 15 CAUTION: ONE OF THE MOST COMMON CAUSES OF TROUBLE IN FORCED AIR HEATING SYSTEMS IS DUE TO INSUFFICIENT RETURN AIR TO THE FURNACE. THE RETURN AIR SYSTEM SHOULD BE APPROXIMATELY EQUAL TO OR GREATER THAN THE AREA OF THE WARM AIR DISCHARGE. CONSULT LOCAL CODES FOR SPECIAL REQUIREMENTS.
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Page 16: Electrical Connection
ELECTRICAL CONNECTION POWER SUPPLY The electrical supply requirements are listed on the furnace rating plate. A separate supply line with a current overload device and manual switch using type T wire or equivalent, with minimum rating of 63°F (35°C) temperature rise, should be run directly from the main switch box to the junction box located inside the furnace. -
Page 17: To Rate Furnace
SETTING THE THERMOSTAT HEAT ANTICIPATOR The method shown below should be used in measuring the amp draw of the low voltage circuit to assure proper adjustment of the thermostat heat anticipator. WRAP THE THERMOSTAT WIRE 10 TIMES AROUND THE METER LEG AND DIVIDE THE RESULT BY 10 EXAMPLE: "W"... - Page 18 chilled air from entering the furnace, and if manually operated must be equipped with means to prevent operation of the other unit unless the damper is in the full heat or cool position. EXAMPLE : Corrected input for a GMN100-4 installed at an elevation of 6,000 feet using Natural Gas with a heating value of 1000 (BTUH) is = Corrected Input (BTUH) = 100,000 - (6,000 x .04) x (100,000/ 1,000) Corrected Input (BTUH) = 100,000 -(240 x 100)
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Page 19: Main Burner Adjustment
MAIN BURNER ADJUSTMENT MAIN BURNER After furnace has been in operation for approximately five minutes, close the air shutters until yellow tips appear on the flames. Now open the air shutter until yellow tips just disappear and the flames have soft blue cones. Repeat this procedure on all burners. -
Page 20: Circulating Air Filters
The purpose of this device is to disconnect all power to the furnace in event the blower door should become dislodged or is not installed. Operation of this furnace with the blower door being out of position will allow toxic combustion fumes to be transmitted into the living area via the circulating air blower. -
Page 21: Temperature Rise
TEMPERATURE RISE The difference between the temperature of the outlet air and the inlet air is known as the furnace temperature rise. This furnace is designed to operate within the rise range displayed on the furnace series and rating plate. To ensure satisfactory performance, the temperature rise of the furnace must be measured. -
Page 22: Lighting Instructions
This unit is manufactured with a door switch. Do not attempt to jumper or tamper with this switch in any way. 8.) If you desire to operate your system with constant air circulation, please seek advice from your servicing contractor. CLEANING AND INSPECTING THE HEAT EXCHANGER It is the duty of the installer to advise the user to have the furnace inspected and cleaned annually. -
Page 23: Lighting Instructions
LIGHTING INSTRUCTIONS These instructions are also on the furnace FOR YOUR SAFETY READ BEFORE OPERATING WARNING: If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life A. This appliance does not have a pilot. If you cannot reach your gas supplier, It is equipped with an ignition device call the fire department... -
Page 24: Sequence Of Operation
SEQUENCE OF OPERATION This appliance communicates with room thermostat through the low voltage connections described in "Thermostat location and low voltage connections" section of this manual. It is the obligation of the installer to instruct the user how to use the room thermostat and what the normal sequence of operation is in both the heating and cooling modes. -
Page 25: Normal Operation
NORMAL OPERATION HEATING MODE HEAT UP COOL DOWN BLWR STARTS GAS VALVE HTG. SPEED FLAME SENSED VENTER OFF IGNITOR DEACTIVATES. BLOWER OFF GAS VALVE OPENS IGNITOR WARMS UP VENT MOTOR STARTS THERMOSTAT CALL FOR HEAT COOLING MODE TSAT CALLS FOR BLOWER STARTS CONTACTOR BLOWER... -
Page 26: Wiring Diagram
WIRING DIAGRAM...