Maytag Goodman GMS8 Service Instructions Manual
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Maytag Goodman GMS8 Service Instructions Manual

Maytag Goodman GMS8 Service Instructions Manual

80% single stage gas furnaces
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Service Instructions
80% Single Stage Gas Furnaces
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.
®
®
is a registered trademark of Maytag Corporation or its related companies and is used under license.
®
Goodman
& Amana
GMS8, AMS8, GDS8, ADSS8
& Accessories
All rights reserved.
Copyright ©
2013-2014 Goodman Manufacturing Company, L.P.
®
Brand
®
RS6612006r2
August 2014

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Summary of Contents for Maytag Goodman GMS8

  • Page 1 RS6612006r2 ® ® is a registered trademark of Maytag Corporation or its related companies and is used under license. August 2014 All rights reserved. Copyright © 2013-2014 Goodman Manufacturing Company, L.P.

  • Page 2: Table Of Contents

    TABLE OF CONTENTS SYSTEM OPERATION ........37 IMPORTANT INFORMATION ......2-3 TROUBLESHOOTING ........38-39 PRODUCT IDENTIFICATION ......4- 9 MAINTENANCE ..........40- 43 ACCESSORIES ..........10- 14 SERVICING ..........44 - 58 OPERATING INSTRUCTIONS ....15 - 17 SERVICING TABLE OF CONTENTS ....46 PRODUCT DESIGN ........

  • Page 3: Important Information

    IMPORTANT INFORMATION Special Warning for Installation of Furnace or Air Handling Units in Enclosed Areas such as Garages, Utility Rooms or Parking Areas Carbon monoxide producing devices (such as an automobile, space heater, gas water heater, etc.) should not be operated in enclosed areas such as unventilated garages, utility rooms or parking areas because of the danger of carbon monoxide (CO) poisoning resulting from the exhaust emissions.

  • 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. Brand Minor Revision G - Goodman A - Initial Release B - 1st Revision Configuration M - Upflow/Horizontal Major Revision...
  • Page 5 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 A - Initial Release B - 1st Revision Configuration M - Upflow/Horizontal Major Revision...
  • Page 6 PRODUCT IDENTIFICATION M O D E L # M F G . # 8 0 % G A S F U R N A C E S A M S 8 04 0 3 A XA A A M S 8 06 0 3 A XA A A m a n a B ra nd 8 0 % g a s fu rn a c e, 3 3 3/8 "...
  • Page 7 PRODUCT IDENTIFICATION M O D E L # M F G . # 8 0 % G A S F U R N A C E S G M S 8 0 4 0 3 A * A * G M S 8 0 6 0 3 A * A * G o o d m a n B ra n d 8 0 % g a s fu rn a c e , 3 3 3 / 8 "...
  • Page 8 PRODUCT IDENTIFICATION MODEL # MFG # DESCRIPTION Fossil Fuel Kit. The AFE18-60A control is d esigned for use where the indo or coil is lo cated above/d ownstream of a gas or fossil fuel furnace when used with a heat p ump. It will operate AFE18-60A with sing le and two stage heat pumps and single and two stage furna ces.
  • Page 9 PRODUCT IDENTIFICATION MODEL # MFG # DESCRIPTION LP Gas Low Pressure Kit. Designed for application on gas fired furnace products installe d on LP gas listed in this manual. Thi s kit includes harness adaptors to work with White-Rodgers LPLP03 single &...

  • Page 10: Accessories

    ACCESSORIES ® AMANA BRAND "S" Model Furnace Accessories MODEL NUMBE R · · · · · · · AMS80403A** · · · · · · · AMS80603A** · · · · · · · AMS80604B** · · · · · · ·...
  • Page 11 ACCESSORIES ® GOODMAN BRAND "S" Model Furnace Accessories MODEL NUM BER · · · · · · · GMS 8 0 4 0 3 A* * (2 ) (3 ) (4 ) · · · · · · · GMS 8 0 6 0 3 A* * (2 ) (3 ) (4 )
  • Page 12 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 13 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 POWER SUPPLY P1-8 +VD C INPUT POWER +5VDC P1-7 FURNACE DEMAND...
  • 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. FURNACE TWINING KIT - FTK04 (UTEC Control Board) This wiring diagram is for reference only.

  • Page 15: Operating Instructions

    OPERATING INSTRUCTIONS...
  • Page 16 OPERATING INSTRUCTIONS 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 17 OPERATING INSTRUCTIONS 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 18: Product Design

    PRODUCT DESIGN Safety Product Application Please adhere to the following warnings and cautions when This product is designed for use as a residential home gas installing, adjusting, altering, servicing, or operating the fur- furnace. It is not designed or certified for use in mobile nace.
  • Page 19 PRODUCT DESIGN • Exposure to contaminated combustion air will result CSA International in safety and performance-related problems. Do not 8501 East Pleasant Valley install the furnace where the combustion air is ex- Cleveland, OH 44131 posed to the following substances: chlorinated waxes or cleaners A copy of the CAN/CGA B149 Installation Codes can be chlorine-based swimming pool chemicals...
  • Page 20 PRODUCT DESIGN A furnace installed in a confined space (i.e., a closet or on clothes dryers and any appliance not connected to the venting utility room) must have two ventilation openings with a total system. Turn on any exhaust fans, such as range hoods and bathroom exhausts, so they shall operate at maximum speed.
  • Page 21 PRODUCT DESIGN Improved construction and additional insulation in buildings sum of the required volume calculated for all appliances located within the have reduced heat loss by reducing air infiltration and es- space. Rooms communicating directly with the space in which the appli- cape around doors and windows.
  • Page 22 PRODUCT DESIGN Indoor Spaces through Indoor Combustion Air Openings. (2)* Where communicating with the outdoors through horizontal ducts, (2) Combining spaces in different stories. The volumes of spaces in each opening shall have a minimum free area of 1 in. /2000 Btu/hr different stories shall be considered as communicating spaces where (1100 min...
  • Page 23 PRODUCT DESIGN (a) The ratio of the interior spaces shall be the available volume of 9.3.8.3 Ducts shall serve a single space. all communicating spaces divided by the required volume. (b) The outdoor size reduction factor shall be 1 minus the ratio of 9.3.8.4 Ducts shall not serve both upper and lower combustion air open- interior spaces.
  • Page 24 PRODUCT DESIGN When an existing furnace is removed from a venting sys- Crown Wash tem serving other appliances, the venting system may be Roof Line too large to properly vent the remaining attached appliances. For complete details refer to Exisiting Furnace Removal Clay Tile Size Generally Clay Tile Size: 8"...
  • Page 25 PRODUCT DESIGN 10' or Less Proper Chimney Line, terminate with 2' Min. 2' Min. Termination? listed vent cap 3' Min. (Check 1) (Fix 1) Wall or Parapet Chimney channel Chimney free of solid and Change venting liquid fuel arrangements appliances? (Fix 2) 10' or Less (Check 2)
  • Page 26 PRODUCT DESIGN ping does not sound like metal hitting metal, the liner must Check 2 - Any solid or liquid fuel appliances vented be removed and replaced (Fix 4). into this chimney channel. Solid fuel appliances include fireplaces, wood stoves, coal Remember that all appliances must be vented inside the furnaces, and incinerators.
  • Page 27 PRODUCT DESIGN If dilution air will not be available, the chimney must be re- Fix 3 - Rebuild the Crown. lined (Fix 4). If the chimney crown is damaged, a qualified mason must repair it in accordance with nationally recognized building Check 7 - Complete the Installation.
  • Page 28 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 com- be pulled out of the chimney and cut off.
  • Page 29 PRODUCT DESIGN High altitude kits are purchased according to the installa- NOTE: The gas supply pressure on White-Rodger "J" tion altitude and usage of either natural or propane gas. Refer model gas valve, used on single stage furnaces, can to the product Specification Sheet or Technical Manual for a be checked with a gas pressure test kit (Part tabular listing of appropriate altitude ranges and correspond- #0151K00000S) available through our authorized dis-...
  • Page 30 PRODUCT DESIGN following fittings (starting from the gas valve) to reach the 3. Use ground joint unions. outside of the cabinet (NOTE: On the 90% furnaces the 4. Install a drip leg to trap dirt and moisture before it can installer must swap the alternate inlet hole plug with the enter the gas valve.
  • Page 31 PRODUCT DESIGN For satisfactory operation, propane gas pressure must be 11 inch WC at the furnace manifold with all gas appliances in operation. Maintaining proper gas pressure depends on WARNING three main factors: 1. Vaporization rate, depending on temperature of the liq- F THE INFORMATION IN THESE INSTRUCTIONS IS NOT FOLLOWED EXACTLY, A FIRE OR EXPLOSION MAY RESULT CAUSING PROPERTY DAMAGE, PERSONAL uid, and “wetted surface”...
  • Page 32 PRODUCT DESIGN Use a separate fused branch electrical circuit containing When installing a propane storage tank, the contractor must properly sized wire, and fuse or circuit breaker. The fuse consider proper tank sizing, safety, efficiency, ground char- or circuit breaker must be sized in accordance with the acteristics and aesthetics.
  • Page 33 PRODUCT DESIGN HUMIDIFIER WIRING Heating Heating/Cooling Accessory wiring connections are to be made through the Room Room Thermostat 1/4" quick connect terminals provided on the furnace inte- Thermostat grated control module. The Humidifier and Electronic Air Cleaner hot and neutral terminals are identified as HUM and EAC.
  • Page 34 PRODUCT DESIGN A duct system should be installed in accordance with Stan- EXAMPLE: dards of the National Board of Fire Underwriters for the In- stallation of Air Conditioning, Warm Air Heating and Venti- 1400 CFM x 144 in lating Systems, Pamphlets No. 90A and 90B. Filter Size (in A return air filter is not supplied with the furnace.
  • Page 35 PRODUCT DESIGN ADDITIONAL FILTERING ACCESSORIES filter requirement charts for determination of the minimum filter area to ensure proper unit performance. The following External Filter Rack Kit (EFR01) figures show possible filter locations. NOTE: A ductwork The external filter rack kit is intended to provide a location access door must be used in counterflow applications to external to the furnace casing, for installation of a perma- allow filter removal.
  • Page 36 PRODUCT DESIGN Cooling Mode The normal operational sequence in cooling mode is as follows: 1. R and Y thermostat contacts close, initiating a call for cool. 2. Integrated control module performs safety circuit checks. 3. Outdoor fan and compressor are energized. 4.

  • Page 37: System Operation

    SYSTEM OPERATION HEATING - Abnormal Operation sure switch or wiring, or restricted air intake or flue pip- ing. The following presents the probable causes of question- 5. Open Primary or Auxiliary Limit. If the limit control able furnace operation and how to fix them. Look through opens, the air circulator blower will be turned on until the observation window in the blower access door and the limit closes.

  • Page 38: Troubleshooting

    TROUBLESHOOTING ROUBLESHOOTING HART Associated Symptoms of Abnormal Associated Fault Description(s) Possible Causes Corrective Action Cautions and Fault Description(s) Possible Causes Operation Notes LED Code • Furnace fails to operate. NONE • No 115 volt power to • Manual disconnect • Turn power OFF •...
  • Page 39 TROUBLESHOOTING ROUBLESHOOTING HART Symptoms of Abnormal Fault Description(s) Corrective Action 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.
  • Page 40 POLARIZATION AND PHASING INCOMING POWER As more and more electronic's are introduced to the Heat- METER READS METER READS 120 VOLTS 0 VOLTS ing Trade, Polarization of incoming power and phasing of primary to secondary voltage on transformers becomes more important. VOLT / OHM VOLT / OHM Polarization has been apparent in the Appliance industry...

  • Page 41: 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 42 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 43 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 44: 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 45 SERVICING Service Problem No Heat Unsatisfactory Heat POSSIBLE CAUSE Test Method DOTS IN ANALYSIS Remedy GUIDE INDICATE "POSSIBLE CAUSE" • Power Failure Test Voltage • Blown Fuse Test Voltage • Loose Connection Check Wiring • Shorted or Broken Wires Check Wiring S-3A •...
  • Page 46 SERVICING SERVICE NUMBERS CHECKING VOLTAGE..........................47 CHECKING WIRING ............................ 47 S-3A THERMOSTAT AND WIRING ........................47 S-3B HEATING ANTICIPATOR ..........................47 CHECKING TRANSFORMER AND CONTROL CIRCUIT ................48 S-10 CAPACITANCE CHECK ..........................48 S-15 CHECKING CAPACITOR ..........................48 S-15A RESISTANCE CHECK.........................48 S-16 CHECKING AIR CIRCULATOR BLOWER MOTOR (PSC) ..............49 S-200...

  • Page 47: Checking Voltage

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

  • Page 48: Checking Transformer And Control Circuit

    SERVICING Cooling Anticipator S-10 Capacitance Check The cooling anticipator is a small heater (resistor) in the With power On (and Door Interlock Switch closed): thermostat. During the "OFF" cycle it heats the bimetal element helping the thermostat call for the next cooling cycle. WARNING This prevents the room temperature from rising too high before the system is restarted.

  • Page 49: Checking Air Circulator Blower Motor (Psc)

    SERVICING S-200 CHECKING DUCT STATIC The maximum and minimum allowable external static pres- WARNING sures are found in the specification section. These tables HIGH VOLTAGE also show the amount of air being delivered at a given static ISCONNECT POWER BEFORE SERVICING OR by a given motor speed or pulley adjustment.

  • Page 50: Checking Temperature Rise

    SERVICING S-201 CHECKING TEMPERATURE RISE S-300 CHECKING PRIMARY LIMIT CONTROL The more air (CFM) being delivered through a given furnace, All use a nonadjustable, automatic reset, bi-metal type the less the rise will be; so the less air (CFM) being deliv- limit control.

  • Page 51: S-301 Checking Auxiliary Limit Control

    SERVICING VOLT / OHM METER RESET BUTTON COLOR IDENTIFYING Testing Auxiliary Limit Control Testing Primary Limit Control S-301 CHECKING AUXILIARY LIMIT CONTROL WARNING O AVOID POSSIBLE FIRE, ONLY RESET THE AUXILIARY LIMIT CONTROL ONCE. F IT SHOULD OPEN A SECOND TIME, A QUALIFIED SERVICER MUST DETERMINE WHY THE AUXILIARY LIMIT OPENED BEFORE RESETTING AGAIN.

  • Page 52: Induced Draft Blower Motor

    SERVICING The control is designed to open should a flame roll out S-303 INDUCED DRAFT BLOWER Motor occur. An over firing condition or flame impingement on the heat shield may also cause the control to open. If the roll- WARNING out control opens, the air circulation blower will run con- tinuously.

  • Page 53: Checking Orifices

    SERVICING STREAM B .023" - .027" Beckett Burner The length of Dimension "A" determines the angle of Gas Stream "B". WARNING DENT OR BURR ALL G ISCONNECT AS AND LECTRICAL OWER UPPLY. STREAM B In checking main burners, look for signs of rust, oversized and undersized carry over ports restricted with foreign ma- terial, etc, refer to previous drawing.
  • Page 54 SERVICING Gas Manifold Pressure Measurement and Ad- NOTE: At either location, a hose fitting must be installed prior to making the hose connection. justment NOTE: Use apapter kit #0151K00000S to measure gas pres- sure on White-Rodgers 36J22 gas valves. n a c e CAUTION GAS LINE O PREVENT UNRELIABLE OPERATION OR EQUIPMENT DAMAGE, THE...

  • Page 55: Checking Hot Surface Ignitor

    SERVICING b. Attach a hose and manometer to the outlet pressure Gas Valve outlet pressure boss. On/Off c. Turn ON the gas supply. Selector Inlet Pressure Switch d. Turn on power and close thermostat “R” and “W1” contacts to provide a call for low stage heat. e.

  • Page 56: Checking For Flashback

    SERVICING 1. Remove burner compartment door to gain access to the 1. Remove burner compartment door to gain access to ignitor. pressure switch(es). 2. Ignitor cool - approximately 70 - 77°F. 2. Remove wires from the pressure switch(es) electrical terminals. 3.

  • Page 57: Checking For Delayed Ignition

    SERVICING For installations above 4500/5500 feet, please refer to your distributor for required kit(s). Contact the distributor for a WARNING tabular listing of appropriate manufacturer’s kits for propane gas and/or high altitude installations. The indicated kits INE VOLTAGE NOW PRESENT must be used to insure safe and proper furnace operation.

  • Page 58: Checking Flame Sensor

    SERVICING S-314 CHECKING FLAME SENSOR 4. As soon as flame is established a micro-amp reading should be evident once proof of flame (micro-amp read- A flame sensing device is used in conjunction with the igni- ing) is established, the hot surface ignitor will be de- tion control module to prove combustion.

This manual is also suitable for:

Amana ams8Goodman gds8Amana adss8

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