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Goodman AMH8 Service Instructions Manual

Goodman & amana brand 33 3/8" 80% modified two stage gas furnaces
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Service Instructions

®
®
Goodman
& Amana
Brand
33 3/8" 80% Modified Two Stage Gas Furnaces
AMH8, GMH8, GDH8, ADSH8
& Accessories
This manual is to be used by qualified, professionally trained HVAC technicians only. Goodman does not assume any responsibility
for property damage or personal injury due to improper service procedures or services performed by an unqualified
person.The material in this manual does not supercede manufacturer's installation and operation instructions.
RS6612007r1
October 2013
®
is a registered trademark of Maytag Corporation or its related companies and is used under license.
®
All rights reserved.
Copyright ©
2006-2013 Goodman Manufacturing Company, L.P.

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  • Page 1: Service Instructions

    AMH8, GMH8, GDH8, ADSH8 & Accessories This manual is to be used by qualified, professionally trained HVAC technicians only. Goodman does not assume any responsibility for property damage or personal injury due to improper service procedures or services performed by an unqualified person.The material in this manual does not supercede manufacturer’s installation and operation instructions.

  • Page 2: Table Of Contents

    TABLE OF CONTENTS IMPORTANT INFORMATION ......2 - 3 SYSTEM OPERATION ........39 PRODUCT IDENTIFICATION ......4 - 10 TROUBLESHOOTING ........ 40 - 41 ACCESSORIES ........... 11 - 15 MAINTENANCE ........... 42 - 45 OPERATING INSTRUCTIONS ....16 - 18 SERVICING ..........46 - 62 PRODUCT DESIGN ........

  • Page 3: Important Information

    To locate an authorized servicer, please consult your telephone book or the dealer from whom you purchased this product. For further assistance, please contact: CONSUMER INFORMATION LINE CONSUMER INFORMATION LINE ® AMANA BRAND PRODUCTS ® GOODMAN BRAND PRODUCTS TOLL FREE TOLL FREE 1-877-254-4729 (U.S. only) 1-877-254-4729 (U.S. only) email us at: hac.consumer.affairs@amanahvac.com email us at: fax us at: (731) 856-1821 customerservice@goodmanmfg.com...

  • Page 4: Product Identification

    PRODUCT IDENTIFICATION The model and manufacturing number are used for positive identification of component parts used in manufacturing. Please use these numbers when requesting service or parts information. Goodman Furnace Nomenclature (13 Digits) Brand Minor Revision G - Goodman A - Initial Release...
  • Page 5 NOx. Chassis sizes are 14", 17.5" and 21" wide. Goodman® Brand 80% Modified Tw o-Stage Gas Furnace , fired at 2 0,000 BTUH per burner . De dicated down flow installation, 33 3/8" ta ll, Induced d raft, Two stage gas Valve, Integrated GDH80403A* circuit board controlling 2nd stage gas valve by time.
  • Page 6 GMH81005C* 24.5" wide. GMH81205D* GMH80403A* Goodman® Brand 80% Modified Two-Stage Gas Furnace , fired at 20,000 BTUH per GMH80603A* burner. Upflow/Horizontal Left and Right installation, 33 3/8" tall, Induced draft, Two stage GMH80604B* gas Valve, Integrated circuit board controlling 2nd stage gas valve by time. Left or right side...
  • Page 7 33 3/8" tall, Two tone painted cabinet. Induced draft, Two stage gas Valve, AMH80903B* Integrated circuit board controlling 2nd stage gas valve by time. Left or right side gas entry. AMH8**CA AMH80904C* Stainless steel heat exchanger. PSC blower motor. 115 volt silicon nitride igniter. "X"...
  • Page 8 PRODUCT IDENTIFICATION MODEL# MFG.# DESCRIPTION Amana® Brand 80% Modified Two-Stage Ga s Furnace , Dedicated down flow instal lation, 33 ADSH800403AX* 3/8" tall, Two tone painted cabinet. Induced draft, Two stage gas Valve, Integrated circuit board ADSH800603AX* ADSH80***AA control ling 2nd stage gas valve by time. Left or right side gas en try. Stainless steel heat ADSH800804CX* exchanger.
  • Page 9 20,000 Btu's per cell for higher altitudes. This kit is required when installing these furnaces above their maximum rated altitude. High Altitude Kit. The kit is designed to convert Goodman®, Amana® Brand gas furnace models fired at 22,500 BTU's per cell for higher altitudes. This kit is required when installing these furnaces above their maximum rated altitude.
  • Page 10 PRODUCT IDENTIFICATION MODEL # MFG # DESCRIPTION LP Gas Low Pressure Kit . Designed for application on gas fired furnace products installed on LP gas listed in this manual. This kit includes harness adaptors to work with LPLP03 White-Rodgers single & two stage gas valves,Honeywell single and two-stage gas valves, as well as modulating gas valves.

  • Page 11: Accessories

    ACCESSORIES ® GOODMAN BRAND "H" Model Furnace Accessories MODEL NUMBER · · · · · · · G MH8 0 4 0 3 A* * (4 ) (2 ) (3 ) (4 ) · · · · · · ·...
  • Page 12 ® AMANA BRAND "H" Model Furnace Accessories MODEL NUMBER · · · · · · · AMH8 0 4 0 3 A* * (4 ) (2 ) (3 ) (4 ) · · · · · · · AMH8 0 6 0 3 A* *...
  • Page 13 ACCESSORIES EXTERNAL FILTER RACK KIT ( EFR01 ) SLOTS IN FILTER CLEAR SCREWS ON UNIT BLOWER DECK SCREWS UNIT SIDE PANEL FRONT OF UNIT FILTER RACK ASSEMBLY (FACE FILTER OPENING BASE TOWARDS FRONT OF UNIT OF UNIT) RETURN AIR CUTOUT AREA LOWER EDGE SCREW EFR01 EXTERNAL FILTER RACK KIT...
  • Page 14 ACCESSORY WIRING DIAGRAMS 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. 24VAC P1-8 +VDC POWER SUPPLY INPUT POWER +5VDC P1-7 FURNACE DEMAND W1-FURN...
  • Page 15 ACCESSORY WIRING DIAGRAMS 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. FURNACE TWINING KIT - FTK04 (UTEC Control Board) This wiring diagram is for reference only.

  • Page 16: Operating Instructions

    OPERATING INSTRUCTIONS FOR YOUR SAFETY READ BEFORE OPERATING WARNING: Improper If you do not follow these instructions exactly, alteration, service or a fire or explosion may result causing property maintenance can damage, personal injury or loss of life. cause injury or property damage.
  • Page 17 OPERATING INSTRUCTIONS CONSIGNES DE SECURITE - LIRE INSTRUCTIONS DE SERVICE AVANT D'ALLUMER L'APPAREIL 1. UN INSTANT! Lisez d'abord les consignes de securite ci-dessus. 2. Reglez le thermostat a son point le plus bas. AVERTISSEMENT: Le non-respect des instructions qui suivent peut 3.
  • Page 18 OPERATING INSTRUCTIONS...

  • Page 19: Product Design

    In such applications, the furnace must be installed O PREVENT PERSONAL INJURY OR DEATH DUE TO IMPROPER INSTALLATION, installation instructions. with the ADJUSTMENT, ALTERATION, SERVICE OR MAINTENANCE, REFER TO THIS Goodman & Amana Brand 80% furnaces are ETL certi- ® ®...

  • Page 20: Location Requirements And Considerations

    PRODUCT DESIGN cated beneath the furnace between the supply air opening and the combustible floor. CSA International • Exposure to contaminated combustion air will result 8501 East Pleasant Valley in safety and performance-related problems. Do not Cleveland, OH 44131 install the furnace where the combustion air is ex- posed to the following substances: A copy of the CAN/CGA B149 Installation Codes can be chlorinated waxes or cleaners...
  • Page 21 PRODUCT DESIGN als, a minimum of 24 inches service clearance must be c. In so far as practical, close all building doors and windows and all available in front of the unit. doors between the space in which the appliance(s) connected to the venting system are located and other spaces of the building.
  • Page 22 PRODUCT DESIGN COMBUSTION AND VENTILATION AIR 9.3.1.5 Makeup air requirements for the operation of exhaust fans, kitchen REQUIREMENTS ventilation systems, clothes dryers, and fireplaces shall be considered in determining the adequacy of a space to provide combustion air require- WARNING ments.
  • Page 23 PRODUCT DESIGN Chimney or Gas Vent Chimney or Gas Vent NOTE: Each opening must have Ventilation louvers a free area of not less than one (each end of attic) square inch per 1000 BTU of the total input rating of all equip- NOTE: The inlet and outlet air ment in the enclosure, but not openings must each have a free...
  • Page 24 PRODUCT DESIGN each opening. Where the free area through a design of louver or grille or screen is known, it shall be used in calculating the size opening required to NOTE: The single opening must have provide the free area specified. Where the louver and grille design and a free area of not less than one Chimney or Gas Vent square inch per 3000 BTU of...
  • Page 25 PRODUCT DESIGN Category I Venting (Vertical Venting) (80% Furnaces Only) WARNING WARNING O PREVENT DEATH OR SERIOUS ILLNESS TO BUILDING OCCUPANTS DUE TO FLUE PRODUCTS LEAKING INTO THE BUILDING, PROPER INSTALLATION OF GASKETS AND SCREWS IS ESSENTIAL FOR PROVIDING A GAS TIGHT SEAL O PREVENT POSSIBLE PERSONAL INJURY OR DEATH DUE TO BETWEEN THE PARTITION PANEL AND THE INDUCED DRAFT BLOWER.
  • Page 26 PRODUCT DESIGN Check 1 - Proper chimney termination. Checklist Summary A masonry chimney used as a vent for gas fired equipment This checklist serves as a summary of the items to be must extend at least three feet above the highest point where checked before venting an 80% furnace into a masonry it passes through the roof.
  • Page 27 PRODUCT DESIGN Remember that all appliances must be vented inside the Check 2 - Any solid or liquid fuel appliances vented into this chimney channel. liner. Venting one appliance inside the liner and another Solid fuel appliances include fireplaces, wood stoves, coal appliance outside the liner is not acceptable.
  • Page 28 PRODUCT DESIGN Fix 3 - Rebuild the Crown. Check 7 - Complete the Installation. If the chimney crown is damaged, a qualified mason must If Checks 1 through 6 have been satisfactory, and the liner repair it in accordance with nationally recognized building is an acceptable size as determined by the tables in Na- codes or standards.
  • Page 29 PRODUCT DESIGN To install the liner, read and follow the liner manufacturer’s High altitude installations may require both a pressure switch instructions and your local codes. Excess liner length should and an orifice change. These changes are necessary to be pulled out of the chimney and cut off. Use caution when compensate for the natural reduction in the density of both doing this, as the cut edges of flexible liners may be sharp.
  • Page 30 PRODUCT DESIGN High altitude kits are purchased according to the installa- NOTE: The gas supply pressure on White-Rodger "G" tion altitude and usage of either natural or propane gas. model gas valve, used on single stage furnaces, can Refer to the product Specification Sheet or Technical Manual be checked with a gas pressure test kit (Part for a tabular listing of appropriate altitude ranges and cor- #0151K00000S) available through our authorized dis-...
  • Page 31 PRODUCT DESIGN INDIRECT/ALTERNATE INLET PIPING 4. Install a drip leg to trap dirt and moisture before it can enter the gas valve. The drip leg must be a minimum When gas piping enters indirectly to the gas valve through of three inches long. the alternate gas inlet hole the installer must supply the following fittings (starting from the gas valve) to reach the 5.
  • Page 32 PRODUCT DESIGN All propane gas equipment must conform to the safety stan- dards of the National Board of Fire Underwriters, NBFU WARNING Manual 58. For satisfactory operation, propane gas pressure must be N UNDETECTED GAS LEAK WILL CREATE A DANGER OF EXPLOSION 11 inch WC at the furnace manifold with all gas appliances OR FIRE.
  • Page 33 PRODUCT DESIGN Refer to the wiring diagram for wire routings. If any of the original wire as supplied with the furnace must be replaced, Sizing Between Second or Second Stage Regulator & Appliance* Maximum Propane Capacities listed are based on 1/2" W.C. pressure drop at 11" W.C. setting. it must be replaced with wiring material having a tempera- Capacities in 1,000 BTU/hour.
  • Page 34 PRODUCT DESIGN A 40 V.A. transformer and an integrated electronic control 115 VOLT LINE CONNECTION OF ACCESSORIES are built into the furnace to allow use with most cooling (HUMIDIFIER AND ELECTRONIC AIR CLEANER) equipment. Consult the wiring diagram, located in the Tech- nical Manual or on the blower door for further details of 115 WARNING Volt and 24 Volt wiring.
  • Page 35 PRODUCT DESIGN A return air filter is not supplied with the furnace. The in- Upflow furnaces with air delivery of less than 1800 CFM: staller must supply a means of filtering all of the return air. Use one side return or one bottom return ductwork con- Filter(s) shall comply with UL900 or CAN/ULC-S111 Stan- nection.
  • Page 36 PRODUCT DESIGN 3. Integrated ignition control module LED will light. 4. Integrated ignition control monitors safety circuits con- tinuously. Return Air 5. Furnace awaits call from thermostat. Optional EATING Access "A" Door “1 STG” SWITCH IS SET TO POSITION The normal operational sequence in heating mode is as follows: •...
  • Page 37 PRODUCT DESIGN • High-stage gas valve closes after five seconds; low- stage gas valve remains open. The normal operational sequence in fan only mode is as follows: • Integrated control module monitors flame presence. Gas valve will remain open only if flame is detected. •...
  • Page 38 PRODUCT DESIGN TwinComfort™ Configuration & Operation TwinComfort™ This furnace is capable of the following heating modes: • Single Stage (Factory Setting) • Modified Two-Stage > Fixed 5-Min. Low Stage > Auto Time (1-12 Min.) Low Stage To change from the factor single-stage operation, adjust the dipswitches on the ignition control as follows: HEAT OFF SECOND...

  • Page 39: System Operation

    SYSTEM OPERATION 5. Open Primary or Auxiliary Limit. If the limit control HEATING - Abnormal Operation opens, the air circulator blower will be turned on until The following presents the probable causes of questionable the limit closes. The induced draft blower will turn off furnace operation and how to fix them.

  • Page 40: Troubleshooting

    A/GMH8, GDH8, ADSH8 TROUBLESHOOTING ROUBLESHOOTING HART Associated Associated Associated Corrective Action Corrective Action Corrective Action Associated Associated Associated Fault Description(s) Fault Description(s) Fault Description(s) Possible Causes Possible Causes Possible Causes Symptoms of Abnormal Symptoms of Abnormal Symptoms of Abnormal Cautions and Cautions and Cautions and Fault...
  • Page 41 A/GMH8, GDH8, ADSH8 TROUBLESHOOTING ROUBLESHOOTING HART Fault Fault Fault Symptoms of Symptoms of Symptoms of Associated Associated Associated Cautions Cautions Cautions Corrective Action Corrective Action Corrective Action Possible Causes Possible Causes Possible Causes Description(s) Description(s) Description(s) Abnormal Operation Abnormal Operation Abnormal Operation LED Code LED Code...

  • Page 42: Polarization And Phasing

    POLARIZATION AND PHASING INCOMING POWER As more and more electronic's are introduced to the Heat- METER READS METER READS ing Trade, Polarization of incoming power and phasing 120 VOLTS 0 VOLTS of primary to secondary voltage on transformers becomes more important. VOLT / OHM VOLT / OHM Polarization has been apparent in the Appliance industry...

  • Page 43: Maintenance

    MAINTENANCE WARNING HIGH VOLTAGE ISCONNECT POWER BEFORE SERVICING OR INSTALLING THIS UNIT. ULTIPLE POWER SOURCES MAY BE PRESENT. AILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH. CAUTION Maintenance Improper filter maintenance is the most common cause of F YOU MUST HANDLE THE ITNITOR, HANDLE WITH CARE.
  • Page 44 MAINTENANCE FLAME SENSOR (QUALIFIED SERVICER ONLY) Other recording type instruments can be essential in solv- Under some conditions, the fuel or air supply can create a ing abnormal problems, however, in many instances they nearly invisible coating on the flame sensor. This coating may be rented from local sources.
  • Page 45 MAINTENANCE gas and with proper inlet pressures and correct piping size, full capacity will be obtained. With propane gas, no unit gas valve regulator is used; how- ever, the second stage supply line pressure regulator should be adjusted to give 11" water column with all other gas consuming appliances running.

  • Page 46: Servicing

    SERVICING CUBIC FEET GAS RATE -- CUBIC FEET PER HOUR Size of Test Dial Size of Test Dial Seconds for Seconds for cu/ft cu/ft cu/ft cu/ft cu/ft cu/ft cu/ft cu/ft cu/ft cu/ft Revolution Revolution 1800 1636 1500 1385 1286 1200 1125 1059 1000...
  • Page 47 SERVICING Service Pr oblem No Heat Unsatisfactory Heat POSSIBLE CAUSE Test Method DOTS IN ANALYSIS Remedy GUIDE INDICATE "POSSIBLE CAUSE" • Power Failure Tes t Voltage • Blown Fuse Tes t Voltage • Loos e Connection Check Wiring • Shorted or Brok en Wires Check Wiring S-3A •...
  • Page 48 SERVICING SERVICE NUMBERS CHECKING VOLTAGE ..........................49 CHECKING WIRING ........................... 49 S-3A THERMOSTAT AND WIRING ........................49 S-3B HEATING ANTICIPATOR ..........................49 CHECKING TRANSFORMER AND CONTROL CIRCUIT ................50 S-10 CAPACITANCE CHECK ..........................50 S-15 CHECKING CAPACITOR ..........................50 S-15A RESISTANCE CHECK.........................51 S-16 CHECKING AIR CIRCULATOR BLOWER MOTOR (PSC)...............51...

  • Page 49: Checking Voltage

    SERVICING S-1 CHECKING VOLTAGE CHECKING THERMOSTAT, WIRING AND ANTICIPATOR WARNING S-3A THERMOSTAT AND WIRING HIGH VOLTAGE ISCONNECT POWER BEFORE SERVICING OR WARNING CHANGING ANY ELECTRICAL WIRING. ULTIPLE POWER SOURCES MAY BE PRESENT. AILURE TO DO SO MAY CAUSE ISCONNECT POWER BEFORE SERVICING. PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

  • Page 50: Checking Transformer And Control Circuit

    SERVICING If the anticipator current draw is unknown, then a current amp draw should be measured to determine the anticipa- WARNING tor setting. Use an amprobe as shown in the following draw- ing. INE VOLTAGE NOW PRESENT 10 TURNS OF 3.

  • Page 51: S-15A Resistance Check

    SERVICING 4. Touch one probe of the ohmmeter to the motor frame (ground) and the other probe in turn to each lead. S-15A Resistance Check If the windings do not test continuous or a reading is ob- tained to ground, replace the motor. 5.

  • Page 52: Checking Temperature Rise

    SERVICING SUPPLY CUTAWAY OF DUCTWORK SUPPLY TO EXPOSE COIL INCLINED MANOMETER Amana Elec tronic Ai r Cleaner Ca ution High Voltage To a void per sonal in j u ry, wait 15 secon ds afte r de -ene rgizing u nit b efore touch i n g unit i n terior .

  • Page 53: Checking Primary Limit Control

    SERVICING S-300 CHECKING PRIMARY LIMIT CONTROL All use a nonadjustable, automatic reset, bi-metal type limit control. Refer to the following drawing for the location of the primary limit. Location of Primary Limit Testing Primary Limit Control S-301 CHECKING AUXILIARY LIMIT CONTROL Automatic Reset Auxiliary Limit Located in Blower Scroll The 80% "H"...

  • Page 54: S-302 Checking Flame Rollout Control

    SERVICING S-302 CHECKING FLAME ROLLOUT CONTROL WARNING A temperature activated manual reset control is mounted to the manifold assembly on 80% furnaces, HIGH VOLTAGE ISCONNECT POWER BEFORE SERVICING OR INSTALLING THIS UNIT. ULTIPLE POWER SOURCES MAY BE PRESENT. AILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

  • Page 55: Induced Draft Blower Motor

    SERVICING 7. Turn on electrical power and verify proper unit opera- tion. S-304 CHECKING GAS VALVE (Redundant) A combination redundant operator type gas valve which VOLT / OHM METER provides all manual and automatic control functions required for gas fired heating equipment is used. The valve provides control of main burner gas flow, pres- RES ET sure regulation, and 100 percent safety shut-off.

  • Page 56: Checking Gas Pressure

    SERVICING Orifices should be treated with care in order to prevent sure the gas supply pressure, use the following proce- damage. They should be removed and installed with a box- dure. end wrench in order to prevent distortion. In no instance should an orifice be peened over and redrilled.
  • Page 57 SERVICING ate gas pressure gauge) at the gas valve outlet pres- sure tap. Refer to Measuring Gas Pressure: Two- WARNING Stage Valves figure for two-stage gas valve outlet pres- sure tap connections. HIGH VOLTAGE ISCONNECT ELECTRICAL POWER AND SHUT OFF GAS SUPPLY BEFORE SERVICING OR INSTALLING THIS UNIT.
  • Page 58 SERVICING Common Terminal(C) High Fire Regulator High Fire Coil Adjust Regulator Vent Terminal (HI) Low Fire Coil Terminal (LO) Inlet Pressure Tap 1/8 NPT Measuring Manifold Gas Pressure (36G54 Valve) Outlet Pressure Tap 1/8 NPT High Fire Regulator Regulator Honeywell Model VR9205 Connected to Manometer Adjust Vent Remove regulator cover screw from the low (LO)

  • Page 59: Checking Hot Surface Ignitor

    S-308 CHECKING HOT SURFACE IGNITOR interconnect with an inclined manometer as shown in the following figures. 120V Silicon Nitride Igniter - Amana® and Goodman® Brand H model furnaces use a 120V silicon nitride igniter for ignition. The normal operating temperature is approxi- mately 2156°F - 2678°F.

  • Page 60: High Altitude Application (Usa)

    SERVICING S-312 CHECKING FOR DELAYED IGNITION Induced Draft Blower Delayed ignition is a delay in lighting a combustible mix- Pressure Switch ture of gas and air which has accumulated in the combus- Pressure Switch Hose tion chamber. Furnace design makes this extremely unlikely unless safety 1/4"...

  • Page 61: S-314 Checking Flame Sensor

    SERVICING 2. Check for 24 volts from W to C terminal on the ignition control. No voltage. Check transformer, room thermo- PARK PARK EAC- H LINE- H XFMR-H stat, and wiring. If you have 24 volts coming off the transformer but re- ceive approximately 13 volts on the terminal board be- tween (C) and (R), check for blown fuse.
  • Page 62 SERVICING WARNING HIGH VOLTAGE ISCONNECT POWER BEFORE SERVICING OR INSTALLING THIS UNIT. ULTIPLE POWER SOURCES MAY BE PRESENT. AILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH. 1. Disconnect the orange flame sensor wire from the sen- sor .

This manual is also suitable for:

Gmh8Gdh8 seriesAdsh8Amh8 seriesGmh8 seriesAdsh8 series

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