Goodman GMH8 Installation Instructions Manual
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Goodman GMH8 Installation Instructions Manual

Gas-fired warm air furnace
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GMH8
GDH8
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AS
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ARM
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URNACE
I
I
NSTALLATION
NSTRUCTIONS
Installer: Affix all manuals adjacent to the unit.
(CATEGORY 1)
These furnaces comply with requirements
embodied in the American National
®
Standard / National Standard of Canada
ANSI Z21.47·CSA-2.3 Gas Fired Central
C
US
Furnaces.
RECOGNIZE THIS SYMBOL AS A SAFETY PRECAUTION.
ATTENTION INSTALLING PERSONNEL
As a professional installer, you have an obligation to know the product better than the customer.
This includes all safety precautions and related items.
Prior to actual installation, thoroughly familiarize yourself with this Instruction Manual.
Pay special attention to all safety warnings. Often during installation or repair, it is possible to place yourself
in a position which is more hazardous than when the unit is in operation.
Remember, it is your responsibility to install the product safely and to know it well enough
to be able to instruct a customer in its safe use.
Safety is a matter of common sense...a matter of thinking before acting.
Most dealers have a list of specific, good safety practices...follow them.
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 here take precedence.
*NOTE: Please contact your distributor
or our website for the applicable product data book
referred to in this manual.
Goodman Manufacturing Company, L.P.
2550 North Loop West, Suite 400, Houston, TX 77092
www.goodmanmfg.com
IO-295B
©2006 Goodman Manufacturing Company, L.P.
9/06

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  • Page 1 *NOTE: Please contact your distributor or our website for the applicable product data book referred to in this manual. Goodman Manufacturing Company, L.P. 2550 North Loop West, Suite 400, Houston, TX 77092 www.goodmanmfg.com IO-295B ©2006 Goodman Manufacturing Company, L.P. 9/06...

  • Page 2: Table Of Contents

    Table of Contents I. GENERAL INFORMATION ..............................4 ................................4 NSTALLER ..............................4 RANSPORTATION AMAGE II. SAFETY ................................... 4 (ESD) P ......................... 5 LECTROSTATIC ISCHARGE RECAUTIONS III. PRODUCT APPLICATION ............................... 5 IV. LOCATION REQUIREMENTS AND CONSIDERATIONS ....................6 ..................................6 ENERAL ............................
  • Page 3 Table of Contents XII. START-UP PROCEDURE AND ADJUSTMENT ......................22 ..............................22 URNACE OPERATION ............................... 22 URNACE TART ..............................22 URNACE HUTDOWN ..........................23 UPPLY RESSURE EASUREMENT 36G54 G ..........................23 HITE ODGERS ALVE ....................23 ANIFOLD RESSURE EASUREMENT AND DJUSTMENT ) ......................

  • Page 4: General Information

    I. GENERAL INFORMATION NSTALLER Before installing this unit, please read this manual thoroughly to familiarize yourself with specific items which must be adhered to, WARNING including but not limited to: unit maximum external static pressure, gas pressures, BTU input rating, proper electrical connections, OODMAN WILL NOT BE RESPONSIBLE FOR ANY INJURY OR PROPERTY circulating air temperature rise, minimum or maximum CFM, and DAMAGE ARISING FROM IMPROPER SERVICE OR SERVICE PROCEDURES.

  • Page 5: Electrostatic Discharge (Esd) Precautions

    This furnace can be used in the following non-industrial WARNING commercial applications: Schools, Office buildings, Churches, Retail stores, O PREVENT POSSIBLE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH Nursing homes, Hotels/motels, Common or office areas DUE TO ELECTRICAL SHOCK, THE FURNACE MUST BE LOCATED TO PROTECT In such applications , the furnace must be installed with the THE ELECTRICAL COMPONENTS FROM WATER.

  • Page 6: Location Requirements And Considerations

    Batterymarch Park, Quincy, MA 02269 paint removers varnishes The GMH8 furnaces meet the California NOx emission standards hydrochloric acid and California seasonal efficiency standards. ANNUAL cements and glues inspections of the furnace and its vent system is strongly antistatic fabric softeners for clothes dryers recommended.

  • Page 7: Clearances And Accessibility

    located not less than 18 inches (457 mm) above the floor. LEARANCES AND CCESSIBILITY Protect the furnace from physical damage by vehicles. Unobstructed front clearance of 24" for servicing is • If the furnace is installed horizontally, the furnace access recommended.

  • Page 8: Thermostat Location

    c. In so far as practical, close all building doors and windows V. COMBUSTION AND VENTILATION AIR REQUIREMENTS and all doors between the space in which the appliance(s) connected to the venting system are located and other W A R N IN G spaces of the building.
  • Page 9 (d) In addition to air needed for combustion, air shall be the bottom of the enclosure. The openings shall supplied for ventilation, including all air required for comfort communicate directly, or by ducts, with the outdoors or and proper working conditions for personnel. spaces (crawl or attic) that freely communicate with the outdoors.

  • Page 10: Category I Venting (Vertical Venting)

    *If the appliance room is located against an outside wall and the VI. CATEGORY I VENTING (VERTICAL VENTING) air openings communicate directly with the outdoors, each opening shall have a free area of not less than one square inch per 4,000 WARNING BTU per hour of the total input rating of all appliances in the enclosure.

  • Page 11: Exterior Masonry Chimneys

    VII. EXTERIOR MASONRY CHIMNEYS - CATEGORY I FURNACES ONLY An exterior masonry chimney is defined as a “Masonry chimney exposed to the outdoors on one or more sides below the roof line.” The ability to use a clay lined masonry chimney depends on a parameter not associated with interior chimneys.

  • Page 12: Check 1 - Proper Chimney Termination

    10’ or Less Proper Chimney Line, terminate with Termination? listed vent cap (Check 1) (Fix 1) 2’ Min. 2’ Min. 3’ Min. Wall or Chimney channel Change venting free of solid and Parapet liquid fuel arrangements appliances? (Fix 2) (Check 2) Chimney 10’...

  • Page 13: Check 4 - Debris In Cleanout

    a) Crown leaning • Tile sections misaligned b) Bricks missing • Tile sections missing c) Mortar missing • Gaps between tile sections d) Tile liner cracked • Signs of condensate drainage at the cleanout or vent e) No tile liner connectors Salt staining at mortar joints.

  • Page 14: Fix 2 -Change Venting Arrangements

    2 -C used during construction and remodeling. Various HANGE VENTING ARRANGEMENTS commercial and industrial processes may also be If the masonry chimney has more than one channel, it may be sources of chlorine/fluorine compounds. possible to vent the gas appliances into one channel and vent •...

  • Page 15: Wiring Harness

    Line voltage connections can be made through either the right or WARNING left side panel. The furnace is shipped configured for a left side electrical connection. To make electrical connections through the O AVOID THE RISK OF INJURY, ELECTRICAL SHOCK OR DEATH, THE FURNACE opposite side of the furnace, the junction box must be relocated to MUST BE ELECTRICALLY GROUNDED IN ACCORDANCE WITH LOCAL CODES OR, the left side prior to making electrical connections.

  • Page 16: Volt Thermostat Wiring

    This furnace is equipped with a blower door interlock switch 115 V ONNECTION OF CCESSORIES which interrupts unit voltage when the blower door is opened for LECTRONIC LEANER servicing. Do not defeat this switch. 24 V HERMOSTAT IRING WARNING NOTE: Wire routing must not interfere with circulator blower O AVOID PERSONAL INJURY, ELECTRICAL SHOCK OR DEATH, DISCONNECT operation, filter removal, or routine maintenance.

  • Page 17: Gas Supply And Piping

    It is important to check and adjust the input rate of the furnace to IX. GAS SUPPLY AND PIPING prevent an overfiring situation. Overfiring can cause premature ENERAL heat exchanger failure. The input is controlled by the supply pressure, orifice size, manifold pressure and heating (calorific) The furnace rating plate includes the approved furnace gas input value of the gas.

  • Page 18: Propane Gas Conversion

    Contact your distributor for a tabular listing of appropriate Meter Time In Minutes and Seconds For Normal Input Rating of Furnaces Equipped For Use With Natural Gas manufacturer’s kits for propane gas and/or high altitude installations. The indicated kits must be used to insure safe and INP UT M ETER HEA T...

  • Page 19: Upflow Installations

    • Install a manual shutoff valve between the gas meter and OUNTERFLOW NSTALLATIONS unit within six feet of the unit. If a union is installed, the When the gas piping enters through the left side of the furnace, union must be downstream of the manual shutoff valve, the installer must supply a straight pipe to reach the exterior of the between the shutoff valve and the furnace.

  • Page 20: Circulating Air And Filters

    A gas detecting warning system is the only reliable way to detect a Sizing Between First and Second Stage Regulator* Maximum Propane Capacities listed are based on 2 psig pressure drop at 10 psig setting. propane gas leak. Rust can reduce the level of odorant in propane Capacities in 1,000 BTU/hour.

  • Page 21: Filters - Read This Section Before Installing The Return Air Ductwork

    EATING ILTERS ECTION EFORE NSTALLING ETURN UCTWORK “1 STG” SWITCH IS SET TO POSITION Filters must be used with this furnace. Discuss filter maintenance The normal operational sequence in heating mode is as follows: with the building owner. Filters do not ship with this furnace, but •...

  • Page 22: Cooling Mode

    XII. START-UP PROCEDURE AND ADJUSTMENT • Furnace is now operating in high-stage heating mode. • Furnace must have a 115 VAC power supply properly connected R and W thermostat contacts open, completing the call for and grounded. Proper polarity must be maintained for correct heat.

  • Page 23: Gas Supply Pressure Measurement

    If using the inlet pressure boss on the gas valve, then use the 36G Valve Pressure Check Kit, Goodman Part No. Open to 0151K00000S. Atmosphere 3.

  • Page 24: Gas Input Rate Measurement (Natural Gas Only )

    1. Turn OFF gas to furnace at the manual gas shutoff valve EXAMPLE: external to the furnace. Installation’s gas heating (HTG) value: 1,000 BTU/ft 2. Turn off all electrical power to the system. (Obtained from gas supplier) 3. Back outlet pressure test screw (inlet/outlet pressure boss) Installation’s seconds per cubic foot: 34 sec/ ft out one turn (counterclockwise, not more than one turn).

  • Page 25: Circulator Blower Speed Adjustment

    XIII. OPERATIONAL CHECKS IRCULATOR LOWER PEED DJUSTMENT WARNING WARNING O AVOID PERSONAL INJURY OR DEATH DUE TO ELECTRICAL SHOCK, TURN O AVOID PERSONAL INJURY OR DEATH, DO NOT REMOVE ANY INTERNAL POWER TO THE FURNACE BEFORE CHANGING SPEED TAPS. COMPARTMENT COVERS OR ATTEMPT ANY ADJUSTMENT. LECTRICAL COMPONENTS ARE CONTAINED IN BOTH COMPARTMENTS.

  • Page 26: Safety Circuit Description

    1. Disconnect all power to the furnace. Do not touch the XIV. SAFETY CIRCUIT DESCRIPTION integrated control module or any wire connected to the ENERAL control prior to discharging your body’s electrostatic charge to ground. A number of safety circuits are employed to ensure safe and proper furnace operation.

  • Page 27: Maintenance

    XVI. MAINTENANCE ILTER EMOVAL Depending on the installation, differing filter arrangements can WARNING be applied. Filters can be installed in either the central return register or a side panel external filter rack (upflow only). A media O AVOID ELECTRICAL SHOCK, INJURY OR DEATH, DISCONNECT ELECTRICAL air filter or electronic air cleaner can be used as an alternate filter.

  • Page 28: Burners

    URNERS CAUTION WARNING ABEL ALL WIRES PRIOR TO DISCONNECTION WHEN SERVICING CONTROLS. IRING ERRORS CAN CAUSE IMPROPER AND DANGEROUS OPERATION. O PREVENT PERSONAL INJURY OR DEATH, DO NOT REMOVE ANY INTERNAL ERIFY PROPER OPERATION AFTER SERVICING. COMPARTMENT COVERS OR ATTEMPT ANY ADJUSTMENT. LECTRICAL COMPONENTS ARE CONTAINED IN BOTH COMPARTMENTS.

  • Page 29: Troubleshooting Chart

    TROUBLESHOOTING CHART Fault Symptoms of Associated Corrective Cautions Possible Description(s) Abnormal Operation & Notes LED Code Causes Action • Assure 115 and 24 volt • Furnace fails to operate. NONE • No 115 volt power • Manual disconnect switch • Turn power OFF power to furnace to furnace, or no 24 OFF, door switch open, or...
  • Page 30 TROUBLESHOOTING CHART Fault Associated Symptoms of Corrective Cautions Possible Description(s) Abnormal Operation LED Code Action & Notes Causes • Check primary limit. • Turn power OFF • Insufficient conditioned air • Circulator blower runs • Primary limit Replace if necessary. over the heat exchanger.

  • Page 31: Wiring Diagram

    WIRING DIAGRAM FOR GMH8 & GDH8 115V XFMR Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
  • Page 32 Visit our website at www.goodmanmfg.com or www.amana-hac.com for information on: • Products • Warranties • Customer Services • Parts • Contractor Programs and Training • Financing Options Goodman Manufacturing Company, L.P. 2550 North Loop West, Suite 400, Houston, TX 77092 www.goodmanmfg.com 2004-2006 Goodman Manufacturing Company, L.P. ©...

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