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MGD Series Gas Furnace Installation Instructions
INSTALLATION INSTRUCTIONS
SEALED COMBUSTION
DOWNFLOW MGD SERIES
GAS FURNACE
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MGD Series Gas Furnace Installation Instructions SPECIFICATIONS 80 AFUE- AUTOMATIC HOT SURFACE IGNITION Model No. MGD60-E3A MGD75-E3A MGD90-E3A MGD60-E5A MGD75-E5A MGD90-E5A Input, BTUH 60,000 75,000 90,000 60,000 75,000 90,000 Output, BTUH 48,000 60,000 72,000 48,000 60,000 72,000 AFUE, % 80.0 81.0 80.0 80.0 81.0 80.0 With A-Coil Cabinet YES YES YES YES YES YES Ignition
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MGD Series Gas Furnace Installation Instructions SAFETY CONSIDERATIONS INSTALLATION STANDARDS CODE COMPLIANCE The installer shall become familiar with and follow all local codes and regulations which govern the installation of this furnace. Where applicable, local codes may take precedence. • ELECTRIC POWER - tur
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MGD Series Gas Furnace Installation Instructions RETURN AIR 7. Wiring materials located in the return duct system conform to Article 300-22 (B&C) of the National ALCOVE INSTRUCTION Electric Code, ANSI / NFPA-70. The furnace may be installed free standing or in an 8. Gas piping is not run in or through the return duct alcove with a free flow of air back to the furnace. A system. minimum of 18”
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MGD Series Gas Furnace Installation Instructions Heat Controller, Inc. Jackson, MI 49203 MGD Installation Instructions 5
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MGD Series Gas Furnace Installation Instructions Heat Controller, Inc. Jackson, MI 49203 MGD Installation Instructions 6
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MGD Series Gas Furnace Installation Instructions SEALED COMBUSTION ROOF JACK – (REQUIRED) Heat Controller, Inc. Jackson, MI 49203 MGD Installation Instructions 7
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MGD Series Gas Furnace Installation Instructions CUTTING ROOF JACK OPENING INSTALLATION IN SNOW REGIONS A proper installation of the roof jack requires that When the combustion air inlet to the roof jack is openings in roof and ceiling be on the same vertical blocked with snow, the furnace will not operate centerline as the furnace flue collar. See FIG. 1 properly due to the depleted combustion air
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MGD Series Gas Furnace Installation Instructions CONNECT POWER SUPPLY 1. Remove the furnace control panel cover. 2. Insert 115 V wiring through a strain relief bushing on the left side of the furnace. 3. Connect the HOT wire to the black pigtail lead; connect the NEUTRAL wire to the WHITE pigtail lead. Secure the connections with suitable wire nuts and wrap with electrical tape. Refer to Wiri
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MGD Series Gas Furnace Installation Instructions GAS PIPE AND TUBING-MIN SIZES MODEL TYPE LENGTH PIPE TUBING MGD OF SIZE SIZE GAS (FT.) (IN.) (IN. OD) to 20 3/8 5/8 Natural to 60 1/2 - 60 to 70 - 3/4 to 40 3/8 - Propane to 70 - 5/8 to 80 1/2 - to 20 - 5/8 to 50 1/2 - Natural to 60 - 3/4 75 to 80 3/4 - to 30 3/8 - Propane to 60 - 5/8 to 80 1/2 -
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MGD Series Gas Furnace Installation Instructions WIRING DIAGRAM, MGD Heat Controller, Inc. Jackson, MI 49203 MGD Installation Instructions 11
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MGD Series Gas Furnace Installation Instructions REPLACEMENT PARTS Heat Controller, Inc. Jackson, MI 49203 MGD Installation Instructions 12
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MGD Series Gas Furnace Installation Instructions MGD Gas Furnace Parts List ITEM NO. USED ON FURNACE MODEL PART NO. QTY DESCRIPTION 1 All R68DD0010 1 Pressure Switch, -0.20 N.O. 2 All R71CA0006 2 ft. Silicon Tubing 3 All R68CA0005 1 Limit Switch, Manual, Upper-180F 4 All R86GF0050 1 Boost Blower Assembly, w/ Air Orifices 5 All R68GF0001 1 Integrated Control Board, HSI 6 All R68GF0006 1 Gas Valve for HS
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MGD Series Gas Furnace Installation Instructions Reference: NFPA No. 54, ANSI Z 223.1 National Fuel Gas Code Table shows 4% Input Reduction per 1,000 feet elevation For Canadian High Altitude (2,000-4,500 feet), reduce gas pressure to burner manifold (manifold Ps.) to 3.0” W.C. and 9.0” W.C. for LP (Propane) Gas Heat Controller, Inc. Jackson, MI 49203 MGD I
