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Goodman Amana ComfortNet GMVC8 Service Instructions Manual

80% communicating gas furnaces
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Service Instructions
TM
®
Goodman
®
& Amana
Brand
80% Communicating Gas Furnaces
GMVC8, AMVC8, ADVC8
& 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.
®
is a registered trademark of Maytag Corporation or its related companies and is used under license.
®
RS6612008r5
All rights reserved.
August 2016
Copyright ©
2013 - 2014, 2016 Goodman Manufacturing Company, L.P.

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Summary of Contents for Goodman Amana ComfortNet GMVC8

  • Page 1 & 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 - 4 SYSTEM OPERATION COMFORTNET™ ...59 - 64 PRODUCT IDENTIFICATION ...... 5 - 10 POLARIZATION AND PHASING ......65 ACCESSORIES ..........11 - 12 MAINTENANCE ........... 66 - 68 OPERATING INSTRUCTIONS ....13 - 15 SERVICING ..........

  • 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 GOODMAN ® BRAND PRODUCTS AMANA ® 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: 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...
  • Page 6 PRODUCT IDENTIFICATION MODEL# MFG.# DESCRIPTION ® GMVC80704B*AA Goodman Brand 80% communicating capable furnace, 33 3/8" tall, upflow / horizontal installation GMVC80905C*AA positions, 2 stage gas heat, supports 2 stage cooling, induced draft. 4 wire serially communicating ECM GMVC8***AA GMVC81155C*AA motor. 120 volt silicon carbide hot surface ignition. Left or right gas pipe entry. Aluminized steel tubular heat exchanger.
  • Page 7 PRODUCT IDENTIFICATION MODEL# MFG.# DESCRIPTION ® AMVC80704BXAA Amana Brand 80% communicating capable furnace, 33 3/8" tall, upflow / horizontal installation AMVC80905CXAA positions, 2 stage gas heat, supports 2 stage cooling, induced draft. 4 wire serially communicating ECM AMVC8***AA AMVC81155CXAA motor. 120 volt silicon carbide hot surface ignition. Left or right gas pipe entry. Stainless steel tubular heat exchanger.
  • Page 8 PRODUCT IDENTIFICATION MODEL# MFG.# DESCRIPTION ® ADVC80703BXAA Amana Brand 80% communicating capable furnace, 33 3/8" tall, dedicated down flow installation, 2 stage gas ADVC80905CXAA heat, supports 2 stage cooling, induced draft. 4 wire serially communicating ECM motor. 120 volt silicon carbide hot ADVC8***AA ADVC81155CXAA surface ignition.
  • Page 9 RedLINK wireless accessories. Communicating Thermostat Kit - Digitally communicating touchscreen thermostat from Honeywell. Designed for use with compatible Amana ® Brand or Goodman ® Brand Air Handlers or Furnaces and outdoor split AC or Heat Pump units. The CTK03AB thermostat...
  • Page 10 PRODUCT IDENTIFICATION MODEL # MFG # DESCRIPTION Dehumidistat . Wall mou nted, 24 volt hu midity control available as a Dehumidistat used to reduce the airflow in th e air conditioning mode to lower the humidity in an occupied home. This P1227801F control features a moisture-sen sitive nylon element and also provides positive On-Off settings DEHUM1...

  • Page 11: Accessories

    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 12 ACCESSORIES ® ® Goodman & Amana Brand Model Furnace Accessories MODEL NUMBER · · · · · · · A/GMVC80604B** · · · · · · · A/GMVC800805C** · · · · · · · A/GMVC81005C** · · · ·...

  • Page 13: 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 14 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 15 OPERATING INSTRUCTIONS...

  • Page 16: Product Design

    ADJUSTMENT, ALTERATION, SERVICE OR MAINTENANCE, REFER TO THIS ® Goodman & Amana 80% furnaces are ETL certified appli- MANUAL. OR ADDITIONAL ASSISTANCE OR INFORMATION, CONSULT A ances and are appropriate for use with natural or propane QUALIFIED INSTALLER, SERVICE AGENCY OR THE GAS SUPPLIER.
  • Page 17 PRODUCT DESIGN CSA International beneath the furnace between the supply air opening and the combustible floor. 8501 East Pleasant Valley • Exposure to contaminated combustion air will result Cleveland, OH 44131 in safety and performance-related problems. Do not install the furnace where the combustion air is ex- A copy of the CAN/CGA B149 Installation Codes can be posed to the following substances: obtained from:...
  • Page 18 PRODUCT DESIGN A furnace installed in a confined space (i.e., a closet or Turn on clothes dryers and any appliance not connected to the utility room) must have two ventilation openings with a total venting system. Turn on any exhaust fans, such as range hoods and bathroom exhausts, so they shall operate at maximum speed.
  • Page 19 PRODUCT DESIGN reduce the speed of the circulator blower during operation in and other fuel burning appliances. Appliances that pull air the cooling mode. To be compatible with these furnaces, a out of the house (clothes dryers, exhaust fans, fireplaces, dehumidistat must operate on 24 VAC and utilize a switch etc.) increase the problem by starving appliances for air.
  • Page 20 PRODUCT DESIGN 9.3.2.2* Known Air Infiltration Rate Method. Where the air infiltra- 9.3.3 Outdoor Combustion Air. Outdoor combustion air shall be pro- tion rate of a structure is known, the minimum required volume shall be vided through opening(s) to the outdoors in accordance with the meth- determined as follows: ods in 9.3.3.1 or 9.3.3.2.
  • Page 21 PRODUCT DESIGN (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 of air openings shall not be less than 3 in. (80 mm). NOTE: The air duct openings must have a free area of not less than one square inch per...
  • Page 22 PRODUCT DESIGN 9.3.8.4 Ducts shall not serve both upper and lower combustion air MINIMUM VENT MODEL openings where both such openings are used. The separation between UPFLOW COUNTERFLOW ducts servicing upper and lower combustion air openings shall be main- 4 Inch 4 Inch tained to the source of combustion air.
  • Page 23 PRODUCT DESIGN Masonry Chimneys Line, terminate with Proper Chimney Termination? listed vent cap (Check 1) (Fix 1) Chimney channel free of solid and Change venting liquid fuel arrangements (Fix 2) appliances? (Check 2) Rebuild crown Crown in good (Fix 3) condition and/or Reline (Check 3)
  • Page 24 PRODUCT DESIGN 10' or Less Check 3 - Chimney Crown Condition. Damage from condensate usually shows up first in the crown. If any of the following trouble signs are present, the condi- 2' Min. 2' Min. 3' Min. tion of the crown is not satisfactory: a) Crown leaning b) Bricks missing Wall or...
  • Page 25 PRODUCT DESIGN gas appliances. However, the installer must keep in mind Flexible liners should be hung straight or nearly straight. If it the following factors which may render the tile liner unsuit- is spiraled in the chimney and in good condition, it should able for use as a vent: be rehung.
  • Page 26 PRODUCT DESIGN If B vent is to be used, it must be supported adequately. • It is required by the liner manufacturer’s instructions. Supports (such as fire stops or thimbles) must be used to • The previous liner was properly sized and installed, prevent the B vent from coming into direct contact with the and suffered from condensation damage.
  • Page 27 PRODUCT DESIGN This furnace is shipped from the factory configured for natu- INLET GAS SUPPLY PRESSURE ral gas at standard altitude. Propane gas installations re- Natural Gas Minimum: 4.5" w.c. Maximum: 10.0" w.c. quire an orifice change to compensate for the energy con- Propane Gas Minimum: 11.0"...
  • Page 28 PRODUCT DESIGN GAS VALVE The following stipulations apply when connecting gas pip- This unit is equipped with a 24 volt gas valve controlled dur- ing. Refer to the following figures for typical gas line connec- ing furnace operation by the integrated control module. As tions to the furnace.
  • Page 29 PRODUCT DESIGN smell. Contact a local propane gas supplier about installing DIRECT/STANDARD INLET PIPING a gas detecting warning system. If the presence of gas is When gas piping enters directly to the gas valve through the suspected, follow the instructions on Page 3 of this manual. standard inlet hole (upflow through the right side panel), the installer must supply straight pipe with a ground joint union All propane gas equipment must conform to the safety stan-...
  • Page 30 PRODUCT DESIGN ELECTRICAL CONNECTIONS WARNING WARNING N UNDETECTED GAS LEAK WILL CREATE A DANGER OF EXPLOSION OR FIRE. F THE PRESENCE OF GAS IS SUSPECTED, FOLLOW THE INSTRUCTIONS ON THE COVER OF THIS MANUAL. AILURE TO DO SO O AVOID THE RISK OF ELECTRICAL SHOCK, WIRING TO THE UNIT MUST BE SERIOUS PERSONAL INJURY OR DEATH COULD RESULT IN PROPERLY POLARIZED AND GROUNDED.
  • Page 31 PRODUCT DESIGN OPTIONAL ACCESORIES CAUTION ELECTRONIC AIR CLEANER DGES OF SHEET METAL HOLES MAY BE SHARP. SE GLOVES A PRECAUTION HUMIDIFIER WHEN REMOVING HOLE PLUGS. NOTE: Wire routing must not interfere with circulator blower operation, filter removal, or routine maintenance. 120 VAC HOT AND PARK...
  • Page 32 PRODUCT DESIGN NOTE: For single stage cooling applications, a jumper may Options for control: be required between Y1 and Y2 at the furnace control in With the CTK02 thermostat. From the Main Menu > Clock order to achieve the desired single stage cooling airflow. &...
  • Page 33 PRODUCT DESIGN Single-Stage Thermostat Application A single-stage thermostat with only one heating stage may be used to control this furnace. The application of a single- stage thermostat does not offer “true” thermostat-driven two- stage operation, but provides a timed transition from low to high fire.
  • Page 34 PRODUCT DESIGN Models Equipped with PCBKF101 or PCBKF102 Control Board Speed Selection Dip Switches Model Low Stage High Stage Low Stage High Stage Cool Cool Heat Heat Cool Adjust Profile Heat 1050 Selection Selection Selection Selection Switches Switches Switches Switches 1150 *DVC80603B*** 1000...
  • Page 35 PRODUCT DESIGN 24 Volt Dehumidistat Wiring CONTINUOUS FAN OPERATION The optional usage of a dehumidistat allows the furnace’s The two stage furnace control will energize ECM blower mo- circulator blower to operate at a slightly lower speed (85% tor when the fan switch on the thermostat is turned to the of desired speed) during a combined thermostat call for cool- "ON"...
  • Page 36 PRODUCT DESIGN CONTINUOUS FAN OPERATION Example: The airflow being delivered is 1225 CFM. The display indicates 12. If the airflow being delivered is 1275, The two stage furnace control will energize ECM blower mo- the display indicates 13. tor when the fan switch on the thermostat is turned to the "ON"...
  • Page 37 PRODUCT DESIGN Select the desired “adjust” tap by positioning switches Sw itch Ba nk: S4 3 and 4 appropriately. To enable adjustments and se- DIP Switch No. lect -5, 5, -10 or 10% trim, you must set dipswitch S5- Heating 2 to ON.
  • Page 38 PRODUCT DESIGN tion. SWITCH 2 Upflow furnaces with air delivery of 1800 CFM or higher: Use two side returns or one bottom return connection or a DISABLE Trim Enable combination of both. ENABLE Guide dimples locate the side and bottom return cutout lo- •Profile D ramps up to 50% of the demand for 1/2 minute, cations.
  • Page 39 PRODUCT DESIGN Air cleaner installation Maximum Filter (Media) Air Cleaner location Heating Airflow Dimensions Part Number Family Side or bottom return 1200 CFM 16 in X 20 in x 5¼" AM11-1620-5 Side or bottom return 1600 CFM 16 in X 25 in x 5¼" AM11-1625-5 AM11-5 Side or bottom return...
  • Page 40 PRODUCT DESIGN cally require less frequent replacement intervals. Avoid us- Horizontal Installations ing highly restrictive 1" filters which produce static pres- Filter(s) must be installed external to the furnace casing for sure loss greater than .25" W.C. In some installations the horizontal installations.
  • Page 41 PRODUCT DESIGN DIP SWITCHES - FURNACES EQUIPPED WITH PCBKF103 AND HIGHER Dip Switch Switch Bank Purpose Function Heating Off Delay 2 Stage Stat Thermostat 2 Stage Stat Setup 1 Stg Stat 5 min delay 1 Stg Stat auto delay Cooling Airflow Add 5% Minus 5% Trim...

  • Page 42: System Operation

    SYSTEM OPERATION heat to low heat, the control will immediately switch NORMAL SEQUENCE OF OPERATION the induced draft blower and gas valve to their low OWER stage settings. The circulator blower will remain on The normal power up sequence is as follows: high heating speed for thirty (30) seconds before •...
  • Page 43 SYSTEM OPERATION HEATING - Abnormal Operation The normal operational sequence in fan only mode is as The following presents the probable causes of questionable follows: furnace operation and how to fix them. Look through the • R and G thermostat contacts close, initiating a call observation window in the blower access door and make a for fan.
  • Page 44 SYSTEM OPERATION 2. System Lockout. If a flame is not sensed during the 7. Open Fuse. If the control detects an open fuse, it will first seven (4) seconds after the gas valve is energized, inhibit all furnace operation, except the display of the the control turns off the gas.
  • Page 45 SYSTEM OPERATION 14. Invalid Memory Card Data. This condition occurs if 19. Motor Trips. This condition occurs if the ECM motor the control rejects the shared data set on a memory senses a loss of control or becomes overloaded. The card.
  • Page 46 SYSTEM OPERATION 22. Motor Parameters. This condition occurs if the motor does not receive all the information is requires to oper- ate or an event occurs that prevents the motor from run- ning, or the motor fails to start for (40) consecutive at- tempts.

  • Page 47: Troubleshooting

    TROUBLESHOOTING PCBKF103 / PCBKF104 / PCBKF105 ComfortNet™ Symptoms of Abnormal Diagnostic/ Thermostat Only Operation (Legacy & Status LED Fault Description Possible Causes Corrective Actions Notes & Cautions ComfortNet™ Thermostat) Codes Message Code • Furnace fails to operate None • No 115 power to INTERNAL •...
  • Page 48 PCBKF103 / PCBKF104 / PCBKF105 TROUBLESHOOTING Symptoms of Abnormal ComfortNet™ Diagnostic/ Operation (Legacy Thermostat Only Status LED Fault Description Possible Causes Corrective Actions Notes & Cautions & ComfortNet™ Codes Message Code Thermostat) • Induced draft blower • Low stage PS1 OPEN •...
  • Page 49 TROUBLESHOOTING PCBKF103 / PCBKF104 / PCBKF105 ComfortNet™ Symptoms of Abnormal Diagnostic/ Thermostat Only Operation (Legacy Status LED Fault Description Possible Causes Corrective Actions Notes & Cautions & ComfortNet™ Codes Message Code Thermostat) • Furnace fails to operate. • Problem with IGNITER •...
  • Page 50 PCBKF103 / PCBKF104 / PCBKF105 TROUBLESHOOTING ComfortNet™ Symptoms of Abnormal Diagnostic/ Thermostat Only Operation (Legacy Status LED Fault Description Possible Causes Corrective Actions Notes & Cautions & ComfortNet™ Codes Message Code Thermostat) • Operation different than • Invalid memory INVALID MC •...
  • Page 51 TROUBLESHOOTING PCBKF103 / PCBKF104 / PCBKF105 ComfortNet™ Symptoms of Abnormal Diagnostic/ Thermostat Only Operation (Legacy Status LED Fault Description Possible Causes Corrective Actions Notes & Cautions & ComfortNet™ Codes Message Code Thermostat) • Circulator blower MOTOR • Turn power OFF prior •...
  • Page 52 PCBKF101 / 2 TROUBLESHOOTING...
  • Page 53 TROUBLESHOOTING PCBKF101 / 2...
  • Page 54 TROUBLESHOOTING PCBKF101 / 2...
  • Page 55 TROUBLESHOOTING PCBKF101 / 2...
  • Page 56 PCBKF101 / 2 TROUBLESHOOTING...
  • Page 57 PCBKF103 / PCBKF104 / PCBKF105 TROUBLESHOOTING INTERNAL CONTROL FAULT/NO POWER NORMAL OPERATION LOCKOUT DUE TO EXCESSIVE RETRIES LOW STAGE PRESSURE SWITCH STUCK CLOSED AT START OF HEATING CYCLE LOW STAGE PRESSURE SWITCH STUCK OPEN OPEN HIGH LIMIT SWITCH FLAME DETECTED WHEN NO FLAME SHOULD BE PRESENT OPEN FUSE LOW FLAME SIGNAL IGNITER FAULT OR IMPROPER GROUNDING...
  • Page 58 PCBKF101 / 2 TROUBLESHOOTING INTERNAL CONTROL FAULT/NO POWER NORMAL OPERATION NORMAL OPERATION NORMAL OPERATION NORMAL OPERATION NORMAL OPERATION NORMAL OPERATION NORMAL OPERATION NORMAL OPERATION (PCBBF102) NORMAL OPERATION NORMAL OPERATION NORMAL OPERATION NORMAL OPERATION NORMAL OPERATION NORMAL OPERATION NORMAL OPERATION NORMAL OPERATION (PCBKF101) LOCKOUT DUE TO EXCESSIVE RETRIES LOW STAGE PRESSURE SWITCH STUCK CLOSED AT START OF HEATING CYCLE LOW STAGE PRESSURE SWITCH STUCK OPEN...

  • Page 59: System Operation Comfortnet

    SYSTEM OPERATION ComfortNet™ System 4. Dehumidification (lowering of CFM to 85%) only happens ComfortNet™ System during low stage cooling operation. The dehumidification VERVIEW feature is not active during high stage cool. The CTK03A* The ComfortNet system is a system that includes a can be set up to overcool the home in order to reach the ComfortNet compatible furnace and air conditioner or heat RH set point.
  • Page 60 ComfortNet™ System SYSTEM OPERATION YSTEM IRING BETWEEN URNACE AND NOTE: Use of an accessory transformer is recommended if installing a dual fuel system. Failure to use the transformer OMFORT in the outdoor unit could result in over loading of the furnace OMPATIBLE INGLE TAGE...
  • Page 61 SYSTEM OPERATION ComfortNet™ System URNACE DVANCED EATURES ENUS DIAGNOSTICS Submenu Item Indication/User Modifiable Options Comments Fault 1 (FAULT #1) Most recent furnace fault For display only Fault 2 (FAULT #2) Next most recent furnace fault For display only Fault 3 (FAULT #3) Next most recent furnace fault For display only Fault 4 (FAULT #4)
  • Page 62 SYSTEM OPERATION ComfortNet™ System STATUS Submenu Item Indication (for Display Only; not User Modifiable) Mode (MODE) Displays the current furnace operating mode CFM (CFM) Displays the airflow for the current operating mode The integrated furnace control has some on-board tools that may be used to trouble-shoot the network. These tools are; red communications LED, green receive (Rx) LED, and learn button.
  • Page 63 SYSTEM OPERATION ComfortNet™ System YSTEM ROUBLESHOOTING NOTE: Refer to the instructions accompanying the ComfortNet compatible outdoor AC/HP unit for troubleshooting information. Refer to the Troubleshooting Chart for a listing of possible furnace error codes, possible causes and corrective actions. Indication Possible Causes Corrective Action(s) Notes &...
  • Page 64 SYSTEM OPERATION ComfortNet™ System TROUBLESHOOTING Wiring issues may be confirmed (or eliminated) by using the CTK0*** thermostat and sub base, a 4-position connec- (ESD) P LECTROSTATIC ISCHARGE RECAUTIONS tor (included with the kit), and a short section (~ 2ft) of ther- mostat wire.

  • Page 65: Polarization And Phasing

    POLARIZATION AND PHASING 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 120 VOLTS 0 VOLTS primary to secondary voltage on transformers becomes more important. Polarization has been apparent in the Appliance industry VOLT / OHM VOLT / OHM...

  • Page 66: Maintenance

    MAINTENANCE WARNING HIGH VOLTAGE ISCONNECT POWER BEFORE SERVICING OR C o d e s ) . 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 67 MAINTENANCE 4. Inclined Manometer - to measure static pressure, FLUE PASSAGES (QUALIFIED SERVICER ONLY) pressure drop across coils, filters, and draft. At the start of each heating season, inspect and, if neces- sary, clean the furnace flue passages. 5. Water Manometer (12") - to test gas inlet and mani- fold pressure.
  • Page 68 MAINTENANCE The amount (CFM) of air circulated is governed by the external static pressure in inches of water column of duct work, cooling coil, registers, etc., applied externally to the unit versus the motor speed tap (direct drive) or pulley ad- justments of the motor and blower (belt drive).

  • Page 69: Servicing

    SERVICING TABLE OF CONTENTS CHECKING VOLTAGE ............................. 72 CHECKING WIRING ............................... 72 S-3A THERMOSTAT AND WIRING ........................... 72 S-3B HEATING ANTICIPATOR ............................72 CHECKING TRANSFORMER AND Control CIRCUIT .................... 73 S-16A CHECKING AIR CIRCULATOR BLOWER MOTOR (ECM) ..................73 S-200 CHECKING DUCT STATIC .............................
  • Page 70 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 71 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 72: Checking Voltage

    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 73: Checking Transformer And Control Circuit

    SERVICING 3. Use a voltmeter, check voltage across terminals R If the anticipator current draw is unknown, then a current and C. Must read 24 VAC. amp draw should be measured to determine the anticipator setting. Use an amprobe as shown in the following drawing. 4.
  • Page 74 SERVICING 4. Connect one alligator clip from the diagnostic tool to a Checking ECM Motors ground source. ECM motors connect directly to the AC Line Voltage. DO 5. Connect the other alligator clip to a 24VAC source. NOT insert contactors in series with the ECM Motor AC Line.
  • Page 75 SERVICING Electrical Checks - High Voltage Power Circuits 7. If no voltage is present, check supply voltage to the furnace. See section S-1. 8. Disconnect power to the furnace. Reconnect the 5- circuit power harness disconnected in step 2. HIGH VOLTAGE! Disconnect ALL power before servicing Electrical Checks - Low Voltage Control Circuits or installing.

  • Page 76: Checking Duct Static

    SERVICING 1. Disconnect power to the furnace. NOTE: Motor contains capacitors that can hold a charge for several minutes after disconnecting power. Wait 5 min- utes after removing power to allow capacitors to discharge. 2. Disassemble motor as described in steps 2 through 4 above.

  • Page 77: 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 78: Checking Auxiliary Limit Control

    SERVICING Style 1 drawing illustrates the Primary Limit used on the S-301 CHECKING AUXILIARY LIMIT CONTROL 80% furnaces. Auxiliary Limit Control Location The 80% two-stage furnaces use an auxiliary limit (auto- matic reset) control connected in series with the primary limit control and rollout limit controls connected to the inte- grated ignition control.

  • Page 79: S-302 Checking Flame Rollout Control

    SERVICING On two-stage models the ignition control the diagnostic light will flash (4) four times indicating a trip of the rollout switch. These symptoms are identical to a trip of the primary limit control. To aid in identifying these controls, color coded labels have VOLT / OHM been affixed to the back of these controls.

  • Page 80: Induced Draft Blower Motor

    SERVICING S-303 INDUCED DRAFT BLOWER Motor WARNING HIGH VOLTAGE ISCONNECT POWER BEFORE SERVICING OR .023" - .027" INSTALLING THIS UNIT. ULTIPLE POWER SOURCES MAY BE PRESENT. AILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH. Beckett Burner 1.

  • Page 81: Checking Gas Pressure

    SERVICING NOTE: At either location, a hose fitting must be installed prior to making the hose connection. NOTE: Use adapter kit #0151K00000S to measure gas pres- sure on White-Rodgers 36G22 and 36G54 gas valves. installed. STREAM B GAS LINE GAS SHUTOFF VALVE The length of Dimension "A"...
  • Page 82 SERVICING d. Turn on power and close thermostat “R” and “W1” 8. Turn on electrical power and verify proper unit opera- contacts to provide a call for low stage heat. tion. e. Measure the gas manifold pressure with burners fir- ing.

  • Page 83: S-308 Checking Hot Surface Ignitor

    SERVICING High Fire Regulator WARNING Regulator Adjust Vent HIGH VOLTAGE ISCONNECT ELECTRICAL POWER AND SHUT OFF GAS SUPPLY BEFORE SERVICING OR INSTALLING. 7. Turn on gas to furnace and check for leaks. If leaks are found, repair and then reinstall burner compartment door. 8.

  • Page 84: Checking For Flashback

    SERVICING 2. Remove wires from the pressure switch(es) electrical 2. Ignitor cool - approximately 70 - 77°F. terminals. 3. Disconnect the ignitor from the Ignition Control. 3. Using a VOM check from common terminal to NC (Nor- 4. Using an ohmmeter measure the resistance of the igni- mally Closed) - should read open.

  • Page 85: High Altitude Application (Usa)

    SERVICING S-311 HIGH ALTITUDE APPLICATION (USA) WARNING The furnace as shipped requires no change to run be- tween 0 - 4500 feet. Do not attempt to increase the firing O AVOID THE RISK OF ELECTRICAL SHOCK, WIRING TO THE UNIT rate by changing orifices or increasing the manifold pres- MUST BE PROPERLY POLARIZED AND GROUNDED.

  • Page 86: Checking Flame Sensor

    SERVICING a. BEFORE replacing the ECM motor assembly or the 2. Check for 24 volts from W1 to C terminal on the igni- end bell, first check the motor with an Emerson tion control. No voltage. Check transformer, room ther- UltraCheck-EZ diagnostic tool .
  • Page 87 SERVICING PRESSURE SWITCH CHART *MVC8 / ADVC8 Pressure Switch Trip Points And Usage Chart Low Fire Low Fire High Fire High Fire Low / High Set Point on Max Make Set Point on Max Make Pressure Switch Model Pressure Fall Pressure On Pressure Fall Pressure On...

  • Page 88: Accessory Wiring Diagrams

    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. ALL FUEL SYSTEM CONTROL BOARD - AFE1860A 24VAC P1-8 +VDC POWER SUPPLY...
  • Page 89 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. INTEGRATED IGNITION CONTROL WHITE BLACK GREEN DE-HUMIDISTAT DE-HUMIDISTAT - DEHUM1...

  • Page 90: Wiring Diagrams

    SCHEMATICS 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. INTEGRATED CONTROL MODULE LINE LOAD TRANSFORMER INDUCTOR COIL CONTROL ASSEMBLY SCHEMATIC ADVC8/AMVC8/GMVC8_____X* MODEL FURNACES This schematic is for reference only.
  • Page 91 SCHEMATICS 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. TYPICAL SCHEMATIC ADVC8/AMVC8/GMVC8_____X* MODEL FURNACES PCBKF103 This schematic is for reference only. Not all wiring is as shown above. Refer to the appropriate wiring diagram for the unit being serviced.
  • Page 92 *MVC8, *DVC8 WIRING DIAGRAMS 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:

Amana comfortnet amvc8Amana comfortnet advc8

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