Goodman GMEC96 Service Instructions Manual
  1. Manuals
  2. Brands
  3. Goodman Manuals
  4. Furnace
  5. GMEC96
  6. Service instructions manual

Goodman GMEC96 Service Instructions Manual

Two stage furnace with multi-speed ecm motor
Hide thumbs Also See for GMEC96:
Table of Contents

Advertisement

Quick Links

See also: User's Information Manual , User Manual

Service Instructions

Goodman
& Amana
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 manufacturers
installation and operation instructions.
is used under license to Goodman Company, L.P., Houston, TX, USA. All rights reserved.
®
Brand GMEC96/GCEC96
®
Brand AMEC96/ACEC96
Two Stage Furnace
with multi-speed ECM Motor
is a registered trademark of Maytag Corporation or its related companies and
®
Copyright© 2014 - 2017 Goodman Company, L.P.
RS6612013r7
November 2017

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the GMEC96 and is the answer not in the manual?

Questions and answers

Related Manuals for Goodman GMEC96

Summary of Contents for Goodman GMEC96

  • Page 1: Service Instructions

    Two Stage Furnace with multi-speed ECM Motor 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 manufacturers installation and operation instructions.

  • Page 2: Table Of Contents

    TABLE OF CONTENTS IMPORTANT INFORMATION ....... 3 ACCESSORIES ..........44 PRODUCT IDENTIFICATION ......5 SERVICING TABLE OF CONTENTS....48 FURNACE SPECIFICATIONS.......9 SERVICING ............49 OPERATION INSTRUCTIONS......10 MAINTENANCE ..........66 SYSTEM OPERATION........11 WIRING DIAGRAMS ........70 -72 IMPORTANT INFORMATION Pride and workmanship go into every product to provide our customers with quality products. It is possible, however, that during its lifetime a product may require service.

  • 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: email us at: hac.consumer.affairs@amanahvac.com...
  • Page 4 IMPORTANT INFORMATION RR V E RR V E "O " "O " R V E N" LE E N"...

  • Page 5: Product Identification

    Please use these numbers when requesting service or parts information. 7,8,9 Brand Minor Revision A - Amana ® Brand A - Initial Release G - Goodman ® Brand B - 1st Revision Configuration Major Revision M - Upflow / Horizontal A - Initial Release...
  • Page 6 PRODUCT IDENTIFICATION MODEL # MFG. # DESCRIPTIO N AM EC96 0 4 0 2BNAA ® AM EC96 0 6 0 3BNAA Ama na Bra nd 9 6 % Two Sta ge Hea ti ng / Two Sta ge Cool i ng Ga s Furna c e, Up AM EC96 0 8 0 3BNAA fl ow/Hor i zonta l Left a nd Ri ght, 3 4 .5 "...
  • Page 7 PCBBF139 Control board which gives installer multiple CFM choices for constant fan ACEC961005BNAA mode. ® Goodman Brand 96% Two Stage Heating / Two Stage Cooling Gas Furnace, Counter GCEC960403BNAA flow/Horizontal Left and Right, 34.5" tall, Induced Draft, Nidec multi-speed ECMmotor.
  • Page 8 AMU1625 P1251306F AMU2020 P1251307F Media Air Cleaner. The Amana (AMU*) and Goodman (GMU*) Media Air Cleaner is a high AMU2025 P1251308F efficiency air filtration device designed to remove dirt, dust, pollen and other microscopic particles from the air passing through it. Flexible performance range up to 2,0...

  • Page 9: Furnace Specifications

    FURNACE SPECIFICATIONS *MEC96 *MEC96 *MEC96 *MEC96 *MEC96 *MEC96 *MEC96 *MEC96 *MEC96 *MEC96 *MEC96 0303ANA 0403ANA 0603ANA 0302BNA 0402BNA 0603BNA 0803BNA 1004CNA 1205DNA 0804CNA 1005CNA Heating Data High Fi re Input¹ 30,000 40,000 60,000 30,000 40,000 60,000 80,000 100,000 120,000 80,000 100,000 High Fi re Output¹...

  • Page 10: Operation Instructions

    OPERATIONS INSTRUCTIONS Introduction age. By putting the furnace, the control, and the person at This is a Category lV furnace. This furnace uses a pressur- the same electrostatic potential, these steps will help avoid ized venting system and must be installed per National and exposing the integrated control module to electrostatic dis- local codes requirements and the installation manual that charge.

  • Page 11: System Operation

    SYSTEM OPERATION • Ensure the temperature of the return air entering the WARNING furnace is between 55°F and 100°F when the furnace is heating. • If the furnace is installed in an application where the O PREVENT PROPERTY DAMAGE, PERSONAL INJURY OR DEATH DUE TO FIRE, DO NOT INSTALL THIS FURNACE IN A MOBILE HOME, TRAILER, OR RECREATIONAL typical operating sound level of a furnace is deemed VEHICLE.
  • Page 12 SYSTEM OPERATION hydrochloric acid *M EC96 M INIMUM CLEARANCES TO COM BUSTIBLE MATERIALS cements and glues antistatic fabric softeners for clothes dryers POSITION* SIDES REAR FRONT BOTTOM FLUE and masonry acid washing materials Upflow 0" 0" 1" 0" 1" • Isolate a non-direct vent furnace if it is installed near Horizontal 6"...

  • Page 13: Injury Or Death

    SYSTEM OPERATION Furnace Suspension f. After it has been determined that each appliance connected to the venting system properly vents when tested as outlined above, If suspending the furnace from rafters or joist, use 3/8" return doors, windows, exhaust fans, fireplace dampers and any threaded rod and 2”x2”x1/8”...
  • Page 14 SYSTEM OPERATION ensure there is an adequate supply of combustion and ven- tilation air for the other appliances. Refer to the latest edi- (1) For appliances other than fan-assisted, calculate using the follow- tion of the National Fuel Gas Code NFPA 54/ANSI Z223.1 ing equation: 21 ft (Section 9.3), or CAN/CGA B149 Installation Codes (Sec-...
  • Page 15 SYSTEM OPERATION 9.3.3.1 Two Permanent Openings Method. Two permanent open- ings, one commencing within 12 in. (300 mm) of the top and one com- Chimney or Gas Vent mencing within 12 in. (300 mm) of the bottom, of the enclosure shall be provided.
  • Page 16 SYSTEM OPERATION (c) The minimum size of outdoor opening(s) shall be the full size 9.3.8.4 Ducts shall not serve both upper and lower combustion air of outdoor opening(s) calculated in accordance with 9.3.3, openings where both such openings are used. The separation between multiplied by the reduction factor.
  • Page 17 SYSTEM OPERATION Leveling Insert flange. Cut 2 ½” long. Leveling ensures proper condensate drainage from the heat exchanger and induced draft blower. For proper flue pipe R 000142 drainage, the furnace must be level lengthwise from end to end. The furnace should also be level from back to front or have a slight tilt with the access doors downhill (approxi- mately 3/4") from the back panel.

  • Page 18: Injury Or Death

    SYSTEM OPERATION portion of a factory built or masonry chimney except when Freeze Protection used as a pathway for PVC as described later in this sec- If the drain trap and drain line will be exposed to tempera- tion. Never common vent this appliance with another ap- tures near or below freezing, adequate measures must be pliance or use a vent which is used by a solid fuel appli- taken to prevent condensate from freezing.

  • Page 19: Injury Or Death

    SYSTEM OPERATION • A vent termination shall not terminate over public walk- bustion air intake to prevent inadvertent blockage. The tee ways or over an area where condensate or vapor or elbows used in the vent/flue termination must be included could create a nuisance or hazard or could be detri- when determining the number of elbows in the piping sys- mental to the operation of regulators, relief valves, or...
  • Page 20 SYSTEM OPERATION 10”- 24” TEE (OPTIONAL) 6” MAX COMBUSTION AIR INTAKE 12” MIN (OPTIONAL) HEIGHT DIFFERENCE 4” MIN BETWEEN *Not required for single pipe installation INTAKE AND VENT 90º OR 45° ELBOW 12" MIN. TO GRADE OR HIGHEST ANTICIPATED SNOW LEVEL 12”...
  • Page 21 SYSTEM OPERATION 1. The vent termination must be located at least 12” above NTAKE ERMINATIONS NSTALLATION OF ground or normally expected snow accumulation levels. TIPLE IRECT URNACES If more than one direct vent furnace is to be installed verti- 2. Do NOT terminate over public walkways. Avoid areas cally through a common roof top, maintain the same mini- where condensate may cause problems such as above mum clearances between the exhaust vent and air intake...

  • Page 22: Warning

    SYSTEM OPERATION Vent CAUTION Maintain 12" (18" for Canada) minimum clearance above highest anticipated snow level. Maximum of O PREVENT UNRELIABLE OPERATION OR EQUIPMENT DAMAGE, THE INLET 24" above roof. Combustion Air GAS SUPPLY PRESSURE MUST BE AS SPECIFIED ON THE UNIT RATING PLATE WITH ALL OTHER HOUSEHOLD GAS FIRED APPLIANCES OPERATING.

  • Page 23: Injury Or Death

    SYSTEM OPERATION PROPANE GAS CONVERSION Natural Gas Capacity of Pipe In Cubic Feet of Gas Per Hour (CFH) Length of Nominal Black Pipe Size WARNING Pipe in Feet 1/2" 3/4" 1" 1 1/4" 1 1/2" 1050 1600 OSSIBLE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH MAY OCCUR IF 1100 THE CORRECT CONVERSION KITS ARE NOT INSTALLED.

  • Page 24: Injury Or Death

    SYSTEM OPERATION Complete information regarding tank sizing for vaporization, GAS PIPING CHECKS recommended regulator settings, and pipe sizing is avail- Before placing unit in operation, leak test the unit and gas able from most regulator manufacturers and propane gas connections. suppliers.

  • Page 25: Injury Or Death

    SYSTEM OPERATION When installing a propane storage tank, the contractor must WARNING consider proper tank sizing, safety, efficiency, ground char- acteristics and aesthetics. For a residential customer, the F THE INFORMATION IN THESE INSTRUCTIONS IS NOT FOLLOWED EXACTLY, A size may range from 100-1,000 gallons, depending on house- FIRE OR EXPLOSION MAY RESULT CAUSING PROPERTY DAMAGE, PERSONAL hold use.

  • Page 26: Injury Or Death

    SYSTEM OPERATION Use a separate fused branch electrical circuit containing ACCESSORY LOAD SPECIFICATIONS properly sized wire, and fuse or circuit breaker. The fuse or Electronic circuit breaker must be sized in accordance with the maxi- 1.0 Am p m aximum at 120 VAC Air Cleaner mum overcurrent protection specified on the unit rating plate.

  • Page 27: Injury Or Death

    SYSTEM OPERATION WINNING Using the “TWIN” terminals and proper wiring enables two *MEC96 furnaces of the same model and size to be twinned. Furnace Twinning allows simultaneous operation of two furnaces and Integrated Control forces the indoor blower motors of each furnace to operate Module synchronously into a common duct system.

  • Page 28: Injury Or Death

    SYSTEM OPERATION A return air filter is not supplied with the furnace. The in- WARNING staller must supply a means of filtering all of the return air. Filter(s) shall comply with UL900 or CAN/ULC-S111 Stan- O AVOID PERSONAL INJURY OR DEATH DUE TO ELECTRICAL SHOCK dards.
  • Page 29 SYSTEM OPERATION DIP S WITCH ETTINGS PCBBF137 CONTROL BOARD DIP SWITCHES Thermostat Selection Switches Heating Fan Off Delay Functi on Swi tch Swi tch Purpos e Group Number Auto 1 OFF* 2 ON* Hea t 10 Mi nutes 1 ON 2 OFF 1, 2 Sta gi ng /...
  • Page 30 SYSTEM OPERATION DIP S WITCH ETTINGS PCBBF137 PCBBF139 *MEC960303AN - COOLING Static DIP Sw itches DIP Sw itches S2-1 S2-2 S2-3 S1-1 S1-2 S1-3 Tstat Call 91 4 **OFF OFF OFF **OFF OFF OFF 1 070 1 040 1 005 91 5 41 0 ON OFF OFF...
  • Page 31 SYSTEM OPERATION DIP S WITCH ETTINGS PCBBF137 PCBBF139 *MEC960403AN - COOLING Static DIP Sw itches DIP Sw itches S2-1 S2-2 S3-3 S1-1 S1-2 S1-3 Tstat Call 91 4 **OFF OFF OFF **OFF OFF OFF 1 070 1 040 1 005 91 5 41 0 ON OFF OFF...
  • Page 32 SYSTEM OPERATION DIP S WITCH ETTINGS PCBBF137 PCBBF139 *MEC960603AN - COOLING Static DIP Sw itches DIP Sw itches S2-1 S2-2 S3-3 S1-1 S1-2 S1-3 Tstat Call **OFF OFF OFF **OFF OFF OFF 1 056 1 026 41 9 ON OFF OFF ON OFF OFF 41 9 ON ON OFF / OFF ON ON...
  • Page 33 SYSTEM OPERATION DIP S WITCH ETTINGS PCBBF139 *CEC960403BN - COOLING Static DIP Switches S1-1 S1-2 S1-3 Tstat Call **OFF OFF OFF 1229 1181 1150 1117 1078 1035 1002 1137 1096 1056 1018 ON OFF OFF 1137 1096 1056 1018 ON ON OFF 1229 1181 1150...
  • Page 34 SYSTEM OPERATION DIP S WITCH ETTINGS PCBBF137 PCBBF139 *CEC960603BN - COOLING Static DIP Switches DIP Switches S2-1 S2-2 S2-3 S1-1 S1-2 S1-3 Tstat Call 1149 1104 1057 1017 **OFF OFF OFF **OFF OFF OFF 1236 1189 1149 1101 1066 1017 ON OFF OFF ON OFF OFF 1149...
  • Page 35 SYSTEM OPERATION DIP S WITCH ETTINGS PCBBF137 PCBBF139 **EC960803BN - COOLING Static DIP Switches DIP Switches S2-1 S2-2 S2-3 S1-1 S1-2 S1-3 Tstat Call **OFF OFF OFF **OFF OFF OFF 1111 1068 1025 ON OFF OFF ON OFF OFF ON ON OFF / OFF ON ON ON ON OFF 1111 1068...
  • Page 36 SYSTEM OPERATION DIP S WITCH ETTINGS PCBBF137 PCBBF139 *MEC960804CN - COOLING Static DIP Switches DIP Switches S2-1 S2-2 S2-3 S1-1 S1-2 S1-3 Tstat Call 1185 1121 1058 **OFF OFF OFF **OFF OFF OFF 1727 1691 1642 1600 1545 1504 1449 1410 1408 1337...
  • Page 37 SYSTEM OPERATION DIP S WITCH ETTINGS PCBBF137 PCBBF139 *MEC961004CN - COOLING DIP Switches DIP Switches S2-1 S2-2 S2-3 S1-1 S1-2 S1-3 1312 1235 1170 1101 1037 **OFF OFF OFF **OFF OFF OFF 1772 1713 1662 1609 1540 1498 1452 1399 1004 ON OFF OFF^ ON OFF OFF^...
  • Page 38 SYSTEM OPERATION DIP S WITCH ETTINGS PCBBF139 *CEC961005CN - COOLING Static DIP Switches S1-1 S1-2 S1-3 Tstat Call 1637 1577 1528 1467 1410 1369 1307 1256 **OFF OFF OFF 2069 2009 1978 1932 1923 1876 1834 1773 1477 1422 1364 1301 1244 1190...
  • Page 39 SYSTEM OPERATION DIP S WITCH ETTINGS PCBBF137 PCBBF139 *MEC961005CN - COOLING Static DIP Switches DIP Switches S2-1 S2-2 S2-3 S1-1 S1-2 S1-3 Tstat Call 1384 1324 1271 1204 1145 1088 1029 **OFF OFF OFF **OFF OFF OFF 2008 1963 1944 1916 1876 1839...
  • Page 40 SYSTEM OPERATION DIP S WITCH ETTINGS PCBBF137 PCBBF139 *MEC961205DN - COOLING DIP Switches DIP Switches S2-1 S2-2 S2-3 S1-1 S1-2 S1-3 1399 1327 1259 1185 1118 1051 **OFF OFF OFF **OFF OFF OFF 1683 1628 1565 1511 1445 1387 1340 1276 1106 1017...

  • Page 41: Injury Or Death

    SYSTEM OPERATION cuitry. · Line polarity is checked. WARNING · The control then enters standby waiting for a call for O AVOID PERSONAL INJURY OR DEATH DUE TO ELECTRICAL SHOCK heat or cool. TURN POWER TO THE FURNACE BEFORE CHANGING SPEED TAPS ·...
  • Page 42 SYSTEM OPERATION heating cycles. CALL FOR 2ND STAGE AFTER FIRST STAGE: · The duty cycle is calculated every cycle and used The inducer motor is enabled at high speed. during the next cycle. The equation for the duty cycle · The pressure switches are checked for closure.
  • Page 43 SYSTEM OPERATION · The circulator fan is energized at lo cool speed after a will remain energized during the entire call for heat cool on delay. The electronic air cleaner will also be sequence. energized. · After the thermostat is satisfied, the compressor is Combustion Quality de-energized Combustion quality can be affected by several factors.

  • Page 44: Accessories

    ACCESSORIES EFR External Filter EFR02 Rack Dual Fuel Kit AFE18-60A Media Air Cleaners AMU / GMU Electronic Air Cleaner ASAS / GSAS Counterflow CFSB17 Subbase 17.5" Counterflow CFSB21 Subbase 21" Concentric Side Wall Flush Mount Vent Kit 0170K00000S (3") Concentric Side Wall Flush Mount Vent Kit 0170K00001S (2")

  • Page 45: Side Wall Vent Kit

    ACCESSORIES EXTERNAL FILTER RACK KIT ( EFR02 ) EFR01 EXTERNAL FILTER RACK KIT Used on Models SLOTS IN FILTER CLEAR SCREWS ON UNIT 90% Upflow Model Furnaces BLOWER DECK SCREWS UNIT SIDE PANEL FRONT OF UNIT FILTER RACK ASSEMBLY (FACE FILTER OPENING BASE TOWARDS FRONT OF UNIT...

  • Page 46: Horizontal Installation

    ACCESSORIES CONCENTRIC VENT CONVERSION KIT ( DCVK-20      DCVK-30 ) ( CVENT-2 ) ( CVENT-3 ) Vent The DCVK-20 (2") or the DCVK- Maintain 12" (18" for Canada) 30 (3") is a concentric vent kit minimum clearance above highest approved with furnaces listed in anticipated snow level.
  • Page 47 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 POWER SUPPLY P1-8 +VDC...

  • Page 48: Servicing

    SERVICING SERVICE NUMBERS CHECKING VOLTAGE ..........................55 CHECKING WIRING ............................ 55 S-3A THERMOSTAT AND WIRING ........................55 S-3B HEATING ANTICIPATOR ..........................55 CHECKING TRANSFORMER AND CONTROL CIRCUIT ................56 S-16A CHECKING AIR CIRCULATOR BLOWER MOTOR (EEM) ................56 S-200 CHECKING DUCT STATIC ........................... 56 S-201 CHECKING TEMPERATURE RISE ......................

  • Page 49: Servicing

    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 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 METER...
  • Page 50 SERVICING CUBIC FEET GAS RATE -- CUBIC FEET PER HOUR Size of Test Dial Size of Test Dial Seconds Seconds for One for One Revolution Revolution 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 51 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 • S-3A Shorted or Broken Wires Check Wiring •...

  • Page 52: Troubleshooting

    TROUBLESHOOTING Green Amber Symptoms Fault Description Check Cautions LED Code LED Code LED Code •Defective disconnect switch •Determine cause and restore •Confirm electrically safe •Furnace fails to operate •defective door switch • No •None •None •None proper high and low volt power condition before •Control board LED is off 115 volt power •No 24 volt...
  • Page 53 TROUBLESHOOTING Green Amber Symptoms Fault Description Check Cautions LED Code LED Code LED Code •Temperature rise, duct static, •Furnace does not •Four •Open limit circuit, main •Confirm electrically safe gas pressure, burner alignment, operate, four Red •None •None repeating limit, aux limit, or roll out condition before orifice plate position, wiring to flashes on control board...
  • Page 54 IAGNOSTIC HART The ignition control is equipped with a momentary push but- Refer to the Troubleshooting Chart in the back of this manual ton switch that can be used to display on the diagnostic for assistance in determining the source of unit operational prob- LED the last five faults detected by the control.

  • Page 55: Checking Voltage

    SERVICING CHECKING THERMOSTAT, WIRING S-1 CHECKING VOLTAGE AND ANTICIPATOR WARNING S-3A THERMOSTAT AND WIRING HIGH VOLTAGE WARNING ISCONNECT POWER BEFORE SERVICING OR 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 56: Checking Transformer And Control Circuit

    SERVICING S-16A CHECKING AIR CIRCULATOR BLOWER S-4 CHECKING TRANSFORMER AND Control CIR- CUIT MOTOR (MULTI-SPEED ECM MOTOR) A step-down transformer 120 volt primary to 24 volt second- ary, 40 VA (Heating and Cooling Models) supplies ample WARNING capacity of power for either operation. ISCONNECT POWER BEFORE SERVICING.

  • Page 57: Checking Temperature Rise

    SERVICING 1. Operate furnace with burners firing for approximately ten To determine proper air movement, proceed as follows: minutes. Check BTU input to furnace - do not exceed 1. With clean filters in the furnace, use a draft gauge (in- input rating stamped on rating plate.

  • Page 58: Checking Auxiliary Limit Control

    SERVICING If the limit circuit opens five times within a single call for heat, the furnace will go into lockout for one hour. The RED PRIMARY LIMIT CONTROL LED will display a FOUR flash code during this time. The control board can be reset by cycling 115 volt power to the furnace.
  • Page 59 SERVICING AUXILIARY LIMIT CONTROL VOLT / OHM METER BLOWER HOUSING RESET BUTTON AUXILIARY LIMIT CONTROL COLOR IDENTIFYING Auxiliary Limit Control Location Testing Auxiliary Limit Control WARNING HIGH VOLTAGE ISCONNECT POWER BEFORE SERVICING OR INSTALLING THIS UNIT. ULTIPLE POWER SOURCES MAY BE PRESENT.

  • Page 60: Checking Flame Rollout Control

    SERVICING CHECKING FLAME ROLLOUT CONTROL 7. After check and/or replacement of rollout switch, rein- stall burner compartment door and verify proper unit op- A temperature activated manual reset control is mounted to eration. the manifold assembly as shown in the following illustration. S-303 INDUCED DRAFT BLOWER Motor FLAME ROLLOUT...

  • Page 61: Checking Main Burners

    SERVICING S-306 CHECKING ORIFICES *MEC96/*CEC96 model furnaces have factory installed #45 natural gas orifices (except *MEC/*CEC96030 which has #50). The only time resizing is required is when a reduction in Two stage gas valves always require 24 volts between com- firing rate is required for an increase in altitude or a furnace mon and low fire (main coil) to open.
  • Page 62 SERVICING If supply pressure differs from table, make the necessary adjustments to pressure regulator, gas piping size, etc., and/or consult with local gas utility. INLET OUTLET 5. Turn OFF gas to furnace at the manual shutoff valve and disconnect manometer. Reinstall plug before turning on gas to furnace.
  • Page 63 SERVICING 6. Turn on power and close thermostat “R” and “W1” High Fire Regulator contacts to provide a call for low stage heat. Regulator Adjust Vent 7. Measure the gas manifold pressure with burners fir- ing. Adjust manifold pressure using the Manifold Gas Pressure table shown below.

  • Page 64: S-308 Checking Hot Surface Ignitor

    SERVICING reinstall burner compartment door and verify proper unit e. Remove the 1/8" NPT hose barb fitting from the outlet operation. pressure tap. Replace the outlet pressure boss plug and seal with a high quality thread sealer. S-309 CHECKING FOR FLASHBACK Flashback will also cause burning in the burner venturi, but is caused by the burning speed being greater than the gas- WARNING...

  • Page 65: High Altitude Application (Usa)

    4 seconds. gas and the altitude. Refer to the National Fuel Gas Code, Goodman ® Brand and Amana® Brand Two-Stage NFPA 54/ANSI Z223.1, and information provided by the gas 1. Check for 120 volts from Line 1 (Hot) to Line 2 (Neutral) supplier to determine the proper orifice size.

  • Page 66: S-314 Checking Flame Sensor

    SERVICING WARNING C A U TIO N - 1 20 V N E U TR A LS HIGH VOLTAGE S T 5 ISCONNECT POWER BEFORE SERVICING OR S T 1 K 1 1 INSTALLING THIS UNIT. ULTIPLE POWER SOURCES MAY S T 2 BE PRESENT.

  • Page 67: 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. Maintenance CAUTION Improper filter maintenance is the most common cause of inadequate heating or cooling performance.
  • Page 68 MAINTENANCE CONDENSATE DRAINAGE SYSTEM (QUALIFIED 3. Volt-Ohm Meter - testing continuity, capacitors, and SERVICER ONLY) motor windings. The drain tubes, standpipe, and field supplied drain line must 4. Inclined Manometer - to measure static pressure, be checked annually and cleaned as often as necessary to pressure drop across coils, filters, and draft.
  • Page 69 MAINTENANCE A / GMEC96 Pressure Switch Trip Points And Usage Chart Coil Cover ID Blower Set Point on Max Make Pressure Low Fire Low Fire High Fire High Fire Low / High Model Pressure Fall Pressure On Switch Set Point on...

  • Page 70: Wiring Diagrams

    WIRING DIAGRAMS *MEC96 - REV AA WARNING:DISCONNECT POWER BEFORE SERVICING. WIRING TO UNIT MUST BE PROPERLY POLARIZED AND GROUNDED. TO 115VAC/ 1 /60 HZ POWER SUPPLY WITH OVERCURRENT PROTECTION DEVICE WARNING: DISCONNECT POWER BEFORE SERVICING. WIRING TO UNIT MUST BE PROPERLY POLARIZED AND GROUNDED.
  • Page 71 *MEC96 - REV AB WIRING DIAGRAMS WARNING:DISCONNECT POWER BEFORE SERVICING. WIRING TO UNIT MUST BE PROPERLY POLARIZED AND GROUNDED. ECM MTR HARNESS CIRCULATOR BLOWER EQUIPMENT GND FIELD GND FIELD SPLICE SWITCH (TEMP.) IGNITER SWITCH (PRESS.) OVERCURRENT PROT. DEVICE JUNCTION TERMINAL INTERNAL TO INTEGRATED CONTROL PLUG CONNECTION...
  • Page 72 *MEC96 - REV AC *CEC96 - REV AA WIRING DIAGRAMS WARNING:DISCONNECT POWER BEFORE SERVICING. WIRING TO UNIT MUST BE PROPERLY POLARIZED AND GROUNDED. ECM MTR HARNESS BLOWER CIRCULATOR EQUIPMENT GND FIELD GND FIELD SPLICE SWITCH (TEMP.) IGNITER SWITCH (PRESS.) OVERCURRENT PROT.

This manual is also suitable for:

Amana acec96Amana amec96Gcec96

Table of Contents

Save PDF