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Amana GMSS9 Series Service Instructions Manual

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Service Instructions

GMSS9*/GCSS9*/AMSS9*/ ACSS9*
Single Stage Gas Furnaces
and 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.
RS6612012r2
March 2015
is a registered trademark of Maytag Corporation or its related companies and is used under license.
All rights reserved.
Copyright © 2014 - 2015 Goodman Company, L.P.

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Summary of Contents for Amana GMSS9 Series

  • Page 1: Service Instructions

    Service Instructions GMSS9*/GCSS9*/AMSS9*/ ACSS9* Single Stage Gas Furnaces and 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.

  • Page 2: Table Of Contents

    TABLE OF CONTENTS IMPORTANT INFORMATION ......2 - 7 SERVICING TABLE OF CONTENTS ....39 PRODUCT IDENTIFICATION ....... 8 -12 TROUBLESHOOTING .........43- 44 INSTALLATION CONSIDERATIONS ..13 - 31 SERVICING ..........45- 55 SYSTEM OPERATION .......32 - 33 MAINTENANCE ..........56- 58 ACCESSORIES ..........34 - 38 WIRING DIAGRAMS..........59 IMPORTANT INFORMATION Pride and workmanship go into every product to provide our customers with quality products.

  • Page 3: Important Information

    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...
  • Page 4 IMPORTANT INFORMATION CO can cause serious illness including permanent brain damage or death. B10259-216 Advertencia especial para la instalación de calentadores ó manejadoras de aire en áreas cerradas como estacionamientos ó cuartos de servicio. Las emisiones de monóxido de carbono pueden circular a través del aparato cuando se opera en cualquier modo.
  • Page 5 IMPORTANT INFORMATION...

  • Page 6: Operating Instructions

    IMPORTANT INFORMATION FOR YOUR SAFETY LIRE AVANT DE METTRE READ BEFORE OPERATING EN MARCHE LIRE WARNING: AVERTISSEMENT: If you do not follow these instructions Quiconque ne respecte pas à exactly, a fire or explosion may result causing property la lettre les instructions dans le presént manuel damage, personal injury or loss of life.

  • Page 7: Important Information

    IMPORTANT INFORMATION FOR YOUR SAFETY READ BEFORE OPERATING WARNING: Improper installation, adjustment, 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 8: 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. Brand Minor Revision A- Amana® G- Goodman® A - Initial Release B - 1st Revision Configuration...
  • Page 9 PRODUCT IDENTIFICATION MODEL # MFG # DESCRIPTION GMSS920402BNAA GMSS920603BNAA Goodman® Brand 92% Single Stage Gas Furnace. 34.5" tall, Upflow/Horizontal GMSS920803BNAA Installation, 1-stage gas valve induced draft. PSC motor. 120-volt silicon carbide GMSS920804CNAA GMSS92 17-second hot surface ignition. Left or right gas pipe entry. The furnace also GMSS920805CNAA features an alum inized steel tubular heat exchanger.
  • Page 10 MODEL # MFG # DESCRIPTION AMSS920402BNAA AMSS920603BNAA ® Amana Brand 92% Single Stage Gas Furnace. Upflow/Horizontal Installation, AMSS920803BNAA 34.5" tall, 1-stage gas valve induced draft. PSC motor. 120-volt silicon carbide 17- AMSS920804CNAA AMSS92 second hot surface ignition. Left or right gas pipe entry. The furnace also features AMSS920805CNAA a stainless steel tubular heat exchanger.
  • Page 11 PRODUCT IDENTIFICATION MODEL # MFG # DESCRIPTION Fossil Fuel Kit. The AFE18-60A control is designed for use where the indoor coil is located above/downstream of a gas or fossil fuel furnace when used with a heat pump. It will operate with single and two stage heat pum ps and single and two stage AFE18-60A furnaces.
  • Page 12 PRODUCT IDENTIFICATION MODEL # MFG # DESCRIPTION DCVK-20 Concentric Vent Kit. This kit is designed to allow terminations of a direct vent furnace (CVENT-2) to be "concentrically" vented through a wall or roof. This kit allows a single penetration DCVK-30 to support terminations for both the vent/flue and the com bustion air intak (CVENT-3) External Filter Rack Kit.

  • Page 13: Installation Considerations

    ADJUSTMENT, ALTERATION, SERVICE OR MAINTENANCE, REFER TO THIS ® ® Goodman brand G*SS9* and Amana brand A*SS9* fur- MANUAL. OR ADDITIONAL ASSISTANCE OR INFORMATION, CONSULT A naces are ETL certified. All furnaces are built for use with QUALIFIED INSTALLER, SERVICE AGENCY OR THE GAS SUPPLIER.
  • Page 14 INSTALLATION CONSIDERATIONS American National Standards Institute nation Locations section in this manual or the instal- lation instructions to determine if the piping system 1430 Broadway from furnace to termination can be accomplished New York, NY 10018 within the guidelines given. NOTE: The length of flue and/or combustion air piping can be a limiting factor National Fire Protection Association in the location of the furnace.
  • Page 15 INSTALLATION CONSIDERATIONS To ensure that the enclosed non-direct vent furnace has an adequate supply of combustion air, vent from a nearby uncontaminated room or from outdoors. Re- fer to the Combustion and Ventilation Air Require- ments section in this manual or the installation in- structions for details.
  • Page 16 INSTALLATION CONSIDERATIONS (Section 9.3), or CAN/CGA B149 Installation Codes (Sec- Corrections must be in accordance with the latest edition of tions 7.2, 7.3, or 7.4), or applicable provisions of the local the National Fuel Gas Code NFPA 54/ANSI Z223.1 and/or building codes for determining the combustion air require- CSA B149 Installation Codes.
  • Page 17 INSTALLATION CONSIDERATIONS ods in 9.3.3.1 or 9.3.3.2. The minimum dimension of air openings shall (1) For appliances other than fan-assisted, calculate using the following not be less than 3 in. (80 mm). equation: 21 ft Required Volume > ________ _________ other 9.3.3.1 Two Permanent Openings Method.
  • Page 18 INSTALLATION CONSIDERATIONS (c) The minimum size of outdoor opening(s) shall be the full size Chimney or Gas Vent of outdoor opening(s) calculated in accordance with 9.3.3, multiplied by the reduction factor. The minimum dimension NOTE: The air duct openings of air openings shall not be less than 3 in. (80 mm). must have a free area of not less than one square inch per 2000 BTU of the total input...
  • Page 19 INSTALLATION CONSIDERATIONS tions. Refer to Vent/Flue Pipe and Combustion Air Pipe 9.3.8.4 Ducts shall not serve both upper and lower combustion air section in the installation instructions for details concerning openings where both such openings are used. The separation between ducts servicing upper and lower combustion air openings shall be main- the conversion to the alternate vent/flue and combustion air tained to the source of combustion air.
  • Page 20 INSTALLATION CONSIDERATIONS Propane Gas and/or High Altitude Installations DISCHARGE WARNING OSSIBLE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH MAY OCCUR IF Side Side THE CORRECT CONVERSION KITS ARE NOT INSTALLED. HE APPROPRIATE KITS Return Return Duct MUST BE APPLIED TO INSURE SAFE AND PROPER FURNACE OPERATION. Duct Connection Connection...
  • Page 21 INSTALLATION CONSIDERATIONS ensure that all piping and connections possess adequate create a nuisance or hazard or could be detrimental structural integrity and support to prevent flue pipe separa- to the operation of regulators, relief valves, or other tion, shifting, or sagging during furnace operation. equipment.
  • Page 22 INSTALLATION CONSIDERATIONS *MSS9* / *CSS9 Direct Vent (2-Pipe) & Non-Direct Vent (1-Pipe) sents the number of elbows and/or tees in each (Vent/Flue Maximum Allowable Length of Vent/FLue Pipe & Combustion Air Intake) pipe. Elbows and/or tees used in the terminations must be included when determining the num- Number of Elbows (3) (5) PIPE...
  • Page 23 INSTALLATION CONSIDERATIONS solvent cemented to a length of pipe connecting the two couplings. The length of pipe should be the wall thickness plus the depth of the socket fittings to be installed on the 90° ELBOWS inside and outside of the wall. The wall penetration should be sealed with silicone caulking material.
  • Page 24 INSTALLATION CONSIDERATIONS exit through the roof of the building. The pipes may be run 2 or 2 1/2" Diameter 3" or 4" Diameter SDR-26 Pipe SDR-26 Pipe through an existing unused chimney; however, they must extend a minimum of 12 inches above the top of the chim- ney.
  • Page 25 INSTALLATION CONSIDERATIONS Drain Information for Horizontal Installations WARNING NOTE: Horizontal installations require 5.5" under the fur- nace to accommodate the drain trap. The horizontal furnace must be installed with ¾" slope from back to front to permit O NOT OPERATE THE FURNACE WITH THE RAIN CAP REMOVED AS condensate flow towards the front of the furnace.
  • Page 26 INSTALLATION CONSIDERATIONS the gas is artificially derated, the appropriate orifice size must be determined based upon the BTU/ft content of the derated gas and the altitude. Refer to the National Fuel Gas Code, NFPA 54/ANSI Z223.1, and information pro- vided by the gas supplier to determine the proper orifice size.
  • Page 27 INSTALLATION CONSIDERATIONS and length of the run. The gas line installation must comply with local codes, or in their absence, with the latest edition WARNING of the National Fuel Gas Code, NFPA 54/ANSI Z223.1. O AVOID THE POSSIBLITY OF EXPLOSION OR FIRE, NEVER USE A MATCH Natural Gas Capacity of Pipe OR OPEN FLAME TO TEST FOR LEAKS.

  • Page 28: Propane Gas Piping Charts

    INSTALLATION CONSIDERATIONS Refer to the following illustration for typical propane gas in- Sizing Betw een First and Second Stage Regulator* Maximum Propane Capacities listed are based on 2 psig pressure drop at 10 psig setting. stallations and piping. Capacities in 1,000 BTU/hour. N o min a l P ip e P ip e o r 5 to 15 PSIG...
  • Page 29 INSTALLATION CONSIDERATIONS is energized with 115 volts whenever the induced draft blower is WARNING energized. This terminal can also be used to provide 115 volt power to a humidifier transformer. The remaining primary HIGH VOLTAGE transformer wire would be connected to the Line N on the ISCONNECT POWER BEFORE SERVICING OR control board.
  • Page 30 INSTALLATION CONSIDERATIONS system and a single stage heating/single stage cooling must not be used as a return air chamber. system. Refer to the following figures for proper connec- When the furnace is used in connection with a cooling unit, tions to the integrated control module. the furnace should be installed in parallel with or on the upstream side of the cooling unit to avoid condensation in the heating element.
  • Page 31 INSTALLATION CONSIDERATIONS return air duct next to the blower compartment. Before in- follows: stalling the air cleaner, consider the application. The elec- 1. R and Y thermostat contacts close, initiating a call for tronic air cleaner must be readily accessible for periodic cool.

  • Page 32: System Operation

    SYSTEM OPERATION HEATING - Abnormal Operation 5. Open Primary or Auxiliary Limit. If the limit control opens, the air circulator blower will be turned on until the The following presents the probable causes of question- limit closes. The induced draft blower will turn off for 5 able furnace operation and how to fix them.
  • Page 33 SYSTEM OPERATION furnace is not improperly sloped. Make sure air condition- ing coil drain is not interfering with furnace drain. Other Causes 1. Manifold Gas Pressure must be set for the gas being used, Natural or L.P., high and low firing rates. If con- verted to L.P.

  • Page 34: Accessories

    ACCESSORIES EXTERNAL FILTER RACK ( EFR02 ) SLOTS IN FILTER CLEAR SCREWS EFR02 EXTERNAL FILTER RACK KIT ON UNIT Used on Models 90% Upflow Model Furnaces UNIT SIDE PANEL FRONT OF UNIT LOWER EDGE SCREW SIDE WALL VENT KIT (0170K00000S/0170K00001S) SIDE WALL VENT KIT (0170K00000S) This side wall only vent kit #0170K00000S is to be used with 2”...

  • Page 35: Horizontal Installation

    ACCESSORIES CONCENTRIC VENT CONVERSION KIT (CVENT-2 (DCVK-20)      CVENT-3 (DCVK-30) Vent The CVENT-2 (DCVK-20) (2") or Maintain 12" (18" for Canada) the CVENT-3 (DCVK-30) (3") is a minimum clearance above highest anticipated snow level. Maximum of concentric vent kit approved with 24"...
  • Page 36 ACCESSORIES GOODMAN® and AMANA® BRAND *MSS9*/*CSS9* Model Furance Accessories - 92% Single Stage MODEL NUMBER *MSS920402BNAA • • • • • • • • • • • *MSS920603BNAA • • • • • • • • • • • *MSS920803BNAA •...
  • Page 37 ACCESSORIES GOODMAN® and AMANA® BRAND *MSS9*/*CSS9* Model Furance Accessories - 96% Single Stage M O D EL N U M B ER *MSS960402B N A A • • • • • • • • • • • *MSS960603B N A A •...
  • Page 38 ACCESSORY WIRE 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. ALL FUEL SYSTEM CONTROL BOARD - AFE1860A 24VAC POWER SUPPLY P1-8 +VD C...

  • Page 39: Servicing Table Of Contents

    SERVICING SERVICE NUMBERS CHECKING VOLTAGE ........................... 45 CHECKING WIRING ..........................45 S-3A THERMOSTAT AND WIRING ......................... 45 S-3B HEATING ANTICIPATOR ........................45 CHECKING TRANSFORMER AND CONTROL CIRCUIT ................ 46 S-10B CAPACITANCE CHECK ......................... 46 S-15 CHECKING CAPACITOR ........................46 S-15A RESISTANCE CHECK ...........................
  • Page 40 SERVICING As more and more electronic's are introduced to the Heat- INCOMING POWER ing Trade, Polarization of incoming power and phasing of METER READS METER READS primary to secondary voltage on transformers becomes 120 VOLTS 0 VOLTS more important. Polarization has been apparent in the Appliance industry since the introduction of the three prong plug, however, VOLT / OHM VOLT / OHM...
  • Page 41 SERVICING CUBIC FEET GAS RATE -- CUBIC FEET PER HOUR Seconds Seconds Size of Test Dial Size of Test Dial for One for One Revolutio Revolutio cu/ft cu/ft cu/ft cu/ft cu/ft cu/ft cu/ft cu/ft cu/ft cu/ft 1800 1636 1500 1385 1286 1200 1125...
  • Page 42 SERVICING Service Proble m No Heat Unsatisfa ctory Heat POSSIBLE CAUSE Test Method DOTS IN ANALYSIS Remedy GUIDE INDICATE "POSSIBLE CAUSE" • Power Failure Test Voltage • Blown Fuse Test Voltage • Loose Connection Check W iring • Shorted or Broken Wires Check W iring S-3A •...

  • Page 43: Troubleshooting

    TROUBLESHOOTING Associated Associated Fault Possible Causes Corrective Action Cautions and Symptoms of Abnormal Fault Possible Causes Description(s) Notes LED Code Operation Description(s) NONE • Furnace fails to • No 115 volt power • Manual disconnect • Turn power OFF • Assure 115 and 24 volt operate.
  • Page 44 TROUBLESHOOTING Fault Corrective Action Symptoms of Abnormal Associated Possible Causes Cautions and Operation Description(s) Notes LED Code • Circulator blower runs • Primary or auxiliary • Turn power OFF • Faulty primary or auxiliary • Check primary/auxiliary continuously. No limit circuit is open. prior to repair.

  • Page 45: Servicing

    SERVICING CHECKING THERMOSTAT, WIRING S-1 CHECKING VOLTAGE 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 46: Checking Transformer And Control Circuit

    SERVICING Cooling Anticipator S-10B CAPACITANCE CHECK The cooling anticipator is a small heater (resistor) in the thermostat. During the "OFF" cycle it heats the bimetal WARNING element helping the thermostat call for the next cooling cycle. This prevents the room temperature from rising too high be- INE VOLTAGE NOW PRESENT fore the system is restarted.

  • Page 47: S-16A Checking Air Circulator Blower Motor (Psc)

    3. Using a ohmmeter, test for continuity between each of the motor leads. 4. Touch one probe of the ohmmeter to the motor frame (ground) and the other probe in turn to each lead. Amana Elect ronic Air Cl eaner Caution High Vo l t a ge...

  • Page 48: S-300 Checking Primary Limit Control

    SERVICING The following drawing illustrates the style of limit switches used on the 90% furnaces. SUPPLY ENCLOSED DISK FRONT VIEW SIDE VIEW RETURN Primary Limit Control Style (90% Furnaces) Checking Temperature Rise WARNING 3. Subtract the return air temperature from the supply air HIGH VOLTAGE temperature to determine the air temperature rise.

  • Page 49: Checking Flame Rollout Control

    SERVICING S-302 CHECKING FLAME ROLLOUT CONTROL A temperature activated manual reset control is mounted to the manifold assembly on 90% furnaces, as shown in the following illustrations. Should read continuous unless heat exchanger tempera- VOLT / OHM METER ture is above limit control setting. If not as above, replace the control.

  • Page 50: Induced Draft Blower Motor

    SERVICING S-304 CHECKING GAS VALVE (REDUNDANT) A combination redundant operator type gas valve which pro- vides all manual and automatic control functions required for gas fired heating equipment is used. VOLT / OHM The valve provides control of main burner gas flow, pressure METER regulation, and 100 percent safety shut-off.

  • Page 51: S-307 Checking Gas Pressure

    SERVICING Orifices should be treated with care in order to prevent dam- WARNING age. They should be removed and installed with a box-end wrench in order to prevent distortion. In no instance should ISCONNECT ELECTRICAL POWER AND SHUT OFF GAS SUPPLY. an orifice be peened over and redrilled.
  • Page 52 SERVICING WARNING WARNING HIGH VOLTAGE INE VOLTAGE NOW PRESENT ISCONNECT ELECTRICAL POWER AND SHUT OFF GAS SUPPLY BEFORE SERVICING OR INSTALLING THIS UNIT. 3. Turn ON the gas and electrical power supply and oper- ULTIPLE POWER SOURCES MAY BE PRESENT. AILURE TO ate the furnace.

  • Page 53: Checking Hot Surface Ignitor

    SERVICING f. Remove regulator cover screw from the outlet pres- Manifold Gas Pressure sure regulator adjust tower and turn screw clock- wise to increase pressure or counterclockwise to Rate Range Nominal decrease pressure. Replace regulator cover screw. High Stage 9.7 to 10.3" w.c. 10.0" w.c. i.

  • Page 54: S-311 High Altitude Application (Usa)

    SERVICING 3. Carry over (lighter tube or cross lighter) obstructed - WARNING clean. 4. Main burner orifice(s) deformed, or out of alignment to HIGH VOLTAGE burner - replace. ISCONNECT POWER BEFORE SERVICING OR INSTALLING THIS UNIT. ULTIPLE POWER SOURCES MAY S-313 CHECKING INTEGRATED IGNITION BE PRESENT.

  • Page 55: Checking Flame Sensor

    SERVICING the sensor terminal. stat, and wiring. 2. Be sure the positive side of the meter is to the sensor If you have 24 volts coming off the transformer but re- (depending on the model) and the negative side of the ceive approximately 13 volts on the terminal board be- meter is to sensor terminal.

  • Page 56: 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 57 MAINTENANCE TEST EQUIPMENT CONDENSATE DRAINAGE SYSTEM (QUALIFIED Proper test equipment for accurate diagnosis is as essen- SERVICER ONLY) The drain tubes, standpipe, and field supplied drain line tial as regular hand tools. must be checked annually and cleaned as often as neces- The following is a must for every service technician and ser- sary to ensure proper condensate drainage.
  • Page 58 MAINTENANCE Since normally propane gas is not installed with a gas meter, Multiplying the ninety (90) cubic feet by 1,025 BTU per cu- clocking will be virtually impossible. The gas orifices used bic foot gives us an input of 92,250 BTUH. with propane are calculated for 2500 BTU per cubic foot gas Checking the BTU input on the rating plate of the furnace and with proper inlet pressures and correct piping size, full...

  • Page 59: Wiring Diagrams

    WIRING DIAGRAMS *MSS92/*CSS92 *MSS96/*CSS96 Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.

This manual is also suitable for:

Gcss9 seriesAmss9 seriesAcss9 series

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