Goodman GMSS9 Series Service Instructions Manual
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Goodman GMSS9 Series Service Instructions Manual

Single stage gas furnaces and accessories
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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.
RS6612012
is a registered trademark of Maytag Corporation or its related companies
August 2014
and is used under license to Goodman Company, L.P., Houston, TX. All rights reserved.
Copyright © 2014
Goodman Manufacturing Company, L.P.

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Summary of Contents for Goodman GMSS9 Series

  • Page 1: Service Instructions

    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 - 6 SERVICING TABLE OF CONTENTS ....38 PRODUCT IDENTIFICATION ......7-11 TROUBLESHOOTING .........42- 43 INSTALLATION CONSIDERATIONS ..12 - 30 SERVICING ..........44- 54 SYSTEM OPERATION ........31 MAINTENANCE ..........55- 57 ACCESSORIES ...........32- 37 IMPORTANT INFORMATION Pride and workmanship go into every product to provide our customers with quality products.

  • 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...
  • Page 4 IMPORTANT INFORMATION...

  • Page 5: 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 6: To Turn Off Gas To Appliance

    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 7: 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 8 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 aluminized steel tubular heat exchanger.
  • Page 9 PRODUCT IDENTIFICATION 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 10 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 pumps and single and two stage AFE18-60A furnaces.
  • Page 11 PRODUCT IDENTIFICATION MODEL # MFG # DESCRIPTION DCVK-20 (CVENT-2) Concentric Vent Kit . This kit is designed to allow terminations of a direct vent furnace 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 combustion air intake pipe.

  • Page 12: Installation Considerations

    O PREVENT PERSONAL INJURY OR DEATH DUE TO IMPROPER INSTALLATION, per the installation instructions. 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.

  • Page 13: Location Requirements And Considerations

    INSTALLATION CONSIDERATIONS 1430 Broadway lation instructions to determine if the piping system 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 14 INSTALLATION CONSIDERATIONS 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. • If the furnace is used in connection with a cooling unit, install the furnace upstream or in parallel with the cooling unit coil.

  • Page 15: Thermostat Location

    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 16 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 17 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 18 INSTALLATION CONSIDERATIONS tions. Refer to Vent/Flue Pipe and Combustion Air Pipe section in the installation instructions for details concerning 9.3.8.4 Ducts shall not serve both upper and lower combustion air the conversion to the alternate vent/flue and combustion air openings where both such openings are used. The separation between ducts servicing upper and lower combustion air openings shall be main- connections on the 90% furnace.

  • Page 19: Freeze Protection

    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 MUST BE APPLIED TO INSURE SAFE AND PROPER FURNACE OPERATION. Duct Duct Connection...
  • Page 20 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 21 INSTALLATION CONSIDERATIONS may be required. Use 1/2” thick closed cell foam insulation *MSS9*/*CSS9 Direct Vent (2-Pipe) such as Armaflex or Insultube where required. & Non-Direct Vent (1-Pipe) Maximum allowable Length of Vent/Flue Pipe (1) (2) & Combustion Air Pipe (Ft) Vent/Flue Pipe Terminations (3) (5) The vent/flue pipe may terminate vertically, as through a roof,...
  • Page 22 INSTALLATION CONSIDERATIONS Alternate Horizontal Vent Termination (Dual Pipe) 12" MIN. 90° ELBOWS VENT/FLUE TEE ( OPTIONAL) 45° ELBOW TURNED DOWN or 90° ELBOW TURNED DOWN 12" MIN. ABOVE HIGHEST ANTICIPATED 3”-24” BETWEEN PIPES SNOW LEVEL INTAKE SCREEN (OPTIONAL) 12" MIN. ABOVE HIGHEST ANTICIPATED SNOW LEVEL Horizontal Termination (Single Pipe)
  • Page 23 INSTALLATION CONSIDERATIONS 2 or 2 1/2" Diameter 3" or 4" Diameter exit through the roof of the building. The pipes may be run 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 24 INSTALLATION CONSIDERATIONS Drain Information for Horizontal Installations NOTE: Horizontal installations require 5.5" under the fur- WARNING 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 25 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 26 INSTALLATION CONSIDERATIONS and length of the run. The gas line installation must comply WARNING with local codes, or in their absence, with the latest edition 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 27: Propane Gas Piping Charts

    INSTALLATION CONSIDERATIONS Sizing Betw een First and Second Stage Regulator* 5 to 15 PSIG Maximum Propane Capacities listed are based on 2 psig pressure drop at 10 psig setting. First Stage (20 PSIG Max.) Capacities in 1,000 BTU/hour. Regulator Continuous 11"...
  • Page 28 INSTALLATION CONSIDERATIONS Connect hot, neutral, and ground wires as shown in the wir- ing diagram located on the unit’s blower door. Line polarity WARNING must be observed when making field connections. Line volt- age connections can be made through either the right or left HIGH VOLTAGE side pan.
  • Page 29 INSTALLATION CONSIDERATIONS trates the typical field wiring for a heat only single stage unit and the utility room wall so the blower will not interfere system and a single stage heating/single stage cooling with combustion air or draft. The room, closet, or alcove system.
  • Page 30 INSTALLATION CONSIDERATIONS installed in any position, except with the access door fac- Cooling Mode ing down. The best location for the air cleaner is in the The normal operational sequence in cooling mode is as fol- return air duct next to the blower compartment. Before in- lows: stalling the air cleaner, consider the application.

  • Page 31: System Operation

    SYSTEM OPERATION HEATING - Abnormal Operation probable cause is either a faulty pressure switch or wir- ing. The following presents the probable causes of question- 4. Pressure Switch Stuck Open. If, after the induced draft able furnace operation and how to fix them. Look through blower is energized, the pressure switch does not close the observation window in the blower access door and within 5 minutes, the control will go into a 1-hour lock-...

  • Page 32: 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 33: 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 34 ACCESSORIES GOODMAN® and AMANA® BRAND *MSS9*/*CSS9* Model Furance Accessories MODEL NUMBER *MSS9*0402BNAA ● ● ● ● ● ● ● ● ● ● *MSS9*0603BNAA ● ● ● ● ● ● ● ● ● ● *MSS9*0803BNAA ● ● ● ● ● ●...
  • Page 35 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 +VDC...
  • Page 36 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. For installations made prior to 2/1/11 FURNACE TWINING KIT - FTK03A (Johnson Control Board) This wiring diagram is for reference only.
  • Page 37 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. For installations made after 2/1/11 FURNACE TWINING KIT - FTK04 (UTEC Control Board) This wiring diagram is for reference only.

  • Page 38: Servicing Table Of Contents

    SERVICING SERVICE NUMBERS CHECKING VOLTAGE ........................... 44 CHECKING WIRING ..........................44 S-3A THERMOSTAT AND WIRING ......................... 44 S-3B HEATING ANTICIPATOR ........................44 CHECKING TRANSFORMER AND CONTROL CIRCUIT ................ 45 S-10B CAPACITANCE CHECK ......................... 45 S-15 CHECKING CAPACITOR ........................45 S-15A RESISTANCE CHECK ...........................
  • Page 39 SERVICING As more and more electronic's are introduced to the Heat- INCOMING POWER ing Trade, Polarization of incoming power and phasing METER READS METER READS of primary to secondary voltage on transformers becomes 120 VOLTS 0 VOLTS more important. Polarization has been apparent in the Appliance industry VOLT / OHM VOLT / OHM since the introduction of the three prong plug, however,...
  • Page 40 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 41 SERVICING Service Problem No He at Unsa tisfa 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 • S-3A Shorted or Broken W ires Check W iring •...

  • Page 42: Troubleshooting

    TROUBLESHOOTING Associated Associated Fault Description(s) Possible Causes Corrective Action Cautions and Symptoms of Abnormal Fault Description(s) Possible Causes Notes Operation LED Code • Furnace fails to operate. NONE • No 115 volt power to • Manual disconnect • Turn power OFF •...
  • Page 43 TROUBLESHOOTING Fault Description(s) Corrective Action Symptoms of Abnormal Associated Possible Causes Cautions and Operation 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 44: Servicing

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

  • Page 45: Checking Transformer And Control Circuit

    SERVICING 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 46: S-16A Checking Air Circulator Blower Motor (Psc)

    SERVICING S-16A CHECKING AIR CIRCULATOR BLOWER work. MOTOR (PSC) SUPPLY WARNING CUTAWAY OF DUCTWORK TO EXPOSE COIL ISCONNECT POWER BEFORE SERVICING. 1. Remove blower compartment door to gain access to the circulator blower motor and integrated ignition con- INCLINED trol. MANOMETER AIR C O MMAN D 2.

  • Page 47: S-300 Checking Primary Limit Control

    SERVICING ENCLOSED DISK SUPPLY FRONT VIEW SIDE VIEW Primary Limit Control Style (90% Furnaces) RETURN WARNING Checking Temperature Rise HIGH VOLTAGE ISCONNECT POWER BEFORE SERVICING OR CHANGING ANY ELECTRICAL WIRING. ULTIPLE POWER 3. Subtract the return air temperature from the supply air SOURCES MAY BE PRESENT.

  • Page 48: 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. VOLT / OHM Should read continuous unless heat exchanger tempera- METER ture is above limit control setting. If not as above, replace the control.

  • Page 49: 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 50: S-307 Checking Gas Pressure

    SERVICING age. They should be removed and installed with a box-end WARNING wrench in order to prevent distortion. In no instance should an orifice be peened over and redrilled. This will change the ISCONNECT ELECTRICAL POWER AND SHUT OFF GAS SUPPLY. angle or deflection of the vacuum effect or entraining of pri- mary air, which will make it difficult to adjust the flame prop- 1.
  • Page 51 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 52: S-308 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 53: High Altitude Application (Usa)

    SERVICING S-313 CHECKING INTEGRATED IGNITION CONTROL BOARDS WARNING NOTE: Failure to earth ground the furnace, reversing the HIGH VOLTAGE neutral and hot wire connection to the line (polarity), or a ISCONNECT POWER BEFORE SERVICING OR high resistance connection in the neutral line may cause INSTALLING THIS UNIT.

  • Page 54: Checking Flame Sensor

    SERVICING 3. Check for 120 volts to the induced draft blower by mea- WARNING suring voltage between Pin 1 (on the 2-pin connector) and Line (Neutral) on the control board. No voltage, re- INE VOLTAGE NOW PRESENT place ignition control. 4.

  • Page 55: 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 56 MAINTENANCE TEST EQUIPMENT CONDENSATE DRAINAGE SYSTEM (QUALIFIED SERVICER ONLY) Proper test equipment for accurate diagnosis is as essen- The drain tubes, standpipe, and field supplied drain line tial as regular hand tools. must be checked annually and cleaned as often as nec- The following is a must for every service technician and essary to ensure proper condensate drainage.
  • Page 57 MAINTENANCE EXAMPLE: with propane are calculated for 2500 BTU per cubic foot gas and with proper inlet pressures and correct piping size, full INPUT: 92,000 BTU/HR capacity will be obtained. OUTPUT CAP: 84,000 With propane gas, no unit gas valve regulator is used; how- Should the figure you calculated not fall within five (5) per- ever, the second stage supply line pressure regulator should cent of the nameplate rating of the unit, adjust the gas valve...

This manual is also suitable for:

Gcss9 seriesAcss9 seriesAmss9 series

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