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Amana GUIA Series Service Instructions Manual

40" 80% and 90% gas furnaces and accessories
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CLICK ANYWHERE on THIS PAGE to RETURN to AMANA / GOODMAN HVAC INFORMATION
at InspectApedia.com
Service
Instructions
40" 80% and 90% Gas Furnaces & Accessories
GUIA, GCIA, GUIB, GCIB, GUIC, GCIC, GUID,
GUIS, GCIS, GUIV, GUCA, GCCA, GUVA, GUSA
Heating
&Air Conditioning
C E R T I F I E D
This manual is to be used by qualified HVAC technicians only. Amana
does not assume any responsibility for property damage or personal injury
®
due to improper service procedures performed by an unqualified person.
This manual replaces RS6600001 Rev. 0 April 2000.
REV. 1 - New models added to manual.
Model and Manufacturing
numbers listed on pages
4 - 14.
RS6600001
Revision 1
October 2000

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  • Page 1 CLICK ANYWHERE on THIS PAGE to RETURN to AMANA / GOODMAN HVAC INFORMATION Model and Manufacturing at InspectApedia.com numbers listed on pages 4 - 14. Service Instructions 40" 80% and 90% Gas Furnaces & Accessories GUIA, GCIA, GUIB, GCIB, GUIC, GCIC, GUID,...

  • Page 2: Table Of Contents

    INDEX Important Safety Information ................... 2-3 Product Identification ....................4-20 Accessories ......................21-32 Product Design ......................33-74 System Operation ....................75-117 Polarization and Phasing ..................118 Maintenance ......................119-121 Servicing ........................122-146 Accessory Wiring Diagrams ..................147-153 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 Safety Information

    WARNING OUS CONDITIONS (SUCH AS EXPOSURE TO ELECTRICAL SHOCK) MAY RESULT. THIS MAY CAUSE SERIOUS INJURY OR DEATH. AMANA WILL NOT BE RESPONSIBLE FOR ANY INJURY OR PROPERTY CAUTION DAMAGE ARISING FROM IMPROPER SERVICE OR SERVICE PROCE- DURES. IF YOU PERFORM SERVICE ON YOUR OWN PRODUCT, YOU ASSUME RESPONSIBILITY FOR ANY PERSONAL INJURY OR PROPERTY DAMAGE WHICH MAY RESULT.

  • Page 4: Product Identification

    PRODUCT IDENTIFICATION This section will identify the models covered and the changes per each model group from one release to the next. Model # Manufacturing # Description Gas Furnace Upflow/Horizontal Induced Draft A Air Command 80 SSE Furnace "A" Initial Design Series. GUIA***A** P1177301F- P1177308F 40"...
  • Page 5 PRODUCT IDENTIFICATION This section will identify the models covered and the changes per each model group from one release to the next. Model # Manufacturing # Description Gas Furnace Upflow/Horizontal Induced Draft C Air Command 80 SSE Furnace "C" Third Design Series "X" NOx Certified. 40"...
  • Page 6 PRODUCT IDENTIFICATION This section will identify the models covered and the changes per each model group from one release to the next. Model # Manufacturing # Description Gas Furnace Upflow/Horizontal Induced Draft C Air Command 80 SSE Furnace "C" Third Design Series "A" Standard Unit (not NOx certified). 40"...
  • Page 7 PRODUCT IDENTIFICATION This section will identify the models covered and the changes per each model group from one release to the next. Model # Manufacturing # Description Gas Furnace Upflow/Horizontal Induced Draft D Air Command 80 SV Furnace "C" Third Design Series "A" Standard Unit (not NOx certified). GUID***CA** P1212401F - P1212407F 40"...
  • Page 8 PRODUCT IDENTIFICATION This section will identify the models covered and the changes per each model group from one release to the next. Model # Manufacturing # Description Gas Furnace Upflow/Horizontal Induced Draft S 2-Stage, Air Command 80 SSE II Furnace "C" Third Design Series "A" Standard Unit (not NOx certified). 40"...
  • Page 9 PRODUCT IDENTIFICATION This section will identify the models covered and the changes per each model group from one release to the next. Model # Manufacturing # Description Gas Furnace Counterflow/Horizontal Induced Draft S 2-Stage, Air Command 80 SSE II Furnace "C" Third Design Series "X" NOx Certified. 40"...
  • Page 10 PRODUCT IDENTIFICATION This section will identify the models covered and the changes per each model group from one release to the next. Model # Manufacturing # Description Gas Furnace Upflow/Horizontal Condensing A Air Command 90 Furnace "A" First Design Series "X" NOx Certified. GUCA***AX** P1219301F - P1219306F 40"...
  • Page 11 PRODUCT IDENTIFICATION This section will identify the models covered and the changes per each model group from one release to the next. Model # Manufacturing # Description Gas Furnace Upflow/Horizontal Variable Speed, 2-Stage, Condensing A Air Command 95 II Q Furnace "A" First Design Series "X" NOx Certified. 40"...
  • Page 12 C ommon V ent K it. For use with Amana 80% furnace models GUIA, GUIB, GUIC, GUID, GCIA, GCIB and GCIC. Must be used on each furnace that is common vented into type B-1 vent system.
  • Page 13 High Altitude Charts as shown in the installation instructions of the kit. H igh A ltitude N atural G as Kit. For use with Amana furnace models GUIA, GUIB, GUIC, GUID, GCIA, GCIB and GCIC. These kits are required when installing Amana Air Command 80 SSE and SV furnaces above their maximum rated altitude.
  • Page 14 Media series of air cleaners can easily be upgraded to a highly efficient EAC5 Electronic Air Cleaner with a permanent washable collecting cell. M edia A ir F ilter. The filter in the Amana Media Air Cleaner (MAC1) must be replaced periodically. The filter cartridges should be replaced with a Trion Air...
  • Page 15 PRODUCT IDENTIFICATION Rev. 1...
  • Page 16 PRODUCT IDENTIFICATION Rev. 1...
  • Page 17 PRODUCT IDENTIFICATION Rev. 1...
  • Page 18 PRODUCT IDENTIFICATION Rev. 1...
  • Page 19 PRODUCT IDENTIFICATION Rev. 1...
  • Page 20 PRODUCT IDENTIFICATION Rev. 1...

  • Page 21: Accessories

    Not used in this application. (2) 7,501 to 11,000 ft. (4) 9,501 to 11,000 ft. Note: All installations above 7,500 ft. require a pressure switch change. Note: For installations in Canada the Amana 80% furnace is certified only to 4,500 ft. Rev. 1...
  • Page 22 Not used in this application. (2) 7,501 to 11,000 ft. (4) 9,501 to 11,000 ft. Note: All installations above 7,500 ft. require a pressure switch change. Note: For installations in Canada the Amana 80% furnace is certified only to 4,500 ft. Rev. 1...
  • Page 23 Not used in this application. (2) 6,001 to 11,000 ft. (4) 8,501 to 11,000 ft. Note: All installations above 6,000 ft. require a pressure switch change. Note: For installations in Canada the Amana 80% furnace is certified only to 4,500 ft. Rev. 1...
  • Page 24 Not used in this application. (2) 6,001 to 11,000 ft. (4) 8,501 to 11,000 ft. Note: All installations above 6,000 ft. require a pressure switch change. Note: For installations in Canada the Amana 80% furnace is certified only to 4,500 ft. Rev. 1...
  • Page 25 (2) 7,001 to 8,500 ft. Note: All installations above 6,000 ft. require a pressure switch change. Note: For installations in Canada the Amana 80% furnace is certified only to 4,500 ft. Note: High Altitude Natural Gas Orifices are included in all HATS kits.
  • Page 26 Note: All installations above 7,000 ft. require a pressure switch change. Note: For installations in Canada the Amana 90% furnace is certified only to 4,500 ft. Note: The GUSA High Altitude Kits have not been determined to date. Information will be provided when received.
  • Page 27 ACCESSORIES COUNTERFLOW FLOOR BASE Furnace Floor Base Gasket Floor 1" Min. 2" Plenum Plenum Duct 3/4" 3/4" 3/4" 4-7/16" Side View Front View Floor Base Used On Floor Opening Plenum Size Part Numbers Models GCCA045__30 CFB16 16-1/2 23-3/4 18-9/16 GCCA070__30 GCCA070__40 CFB20 20-1/2...
  • Page 28 ACCESSORIES EXTERNAL FILTER RACK KIT 23.567 SLOTS IN FILTER CLEAR SCREWS ON UNIT INTERNAL FILTER BLOWER DECK RETAINER SCREWS SCREWS (80% MODELS ONLY) 14.500 UNIT SIDE PANEL EFR01 EXTERNAL FILTER RACK KIT Used on Models FRONT OF UNIT 80% Upflow Model Furnaces INTERNAL 90% Upflow Model Furnaces FILTER...
  • Page 29 ACCESSORIES HORIZONTAL FILTER HOUSING MODEL HR MODEL HRB HR20 & HR25 HORIZONTAL FILTER HOUSING DIMENSIONS HORIZONTAL FILTER HOUSING Model Overall Duct Opening Filter Used on Models Number Size 80% Upflow Furnaces HR20 6-5/8 25-1/2 19-3/4 20x25 90% Upflow Furnaces HR25 6-5/8 20-1/2 19-3/4 20x25...
  • Page 30 ACCESSORIES ELECTRONIC AIR CLEANER EAC5 SPECIFICATIONS 30° RATED CAPACITY 2000 CFM (3400 M /HR) MAX. PRESSURE .13 in. w.g. @ 2000 CFM CELL WEIGHT (2) 12 lbs. each 3-1/2" 46 lbs. UNIT WEIGHT 2-1/8" POWER 48 watts maximum ELECTRICAL INPUT 120 V , 60 HZ, 1 PH ELECTRICAL 3.2 MA @ 6200 VDC...
  • Page 31 Interior Section of Concentric Vent Assembly Concentric Vents Kits HVCK and VCVK are suitable for use Must Be Adequately Secured and Supported with the following Amana 90% efficient furnace products: Sanitary Tee CONCENTRIC VENT KIT Used On Models GUCA Connection for...
  • Page 32 ACCESSORIES COMMMON VENT KIT Vent Damper To Chimney From furnace Flow To Chimney Install vent damper with actuator to sides of vent only. Vent Do not mount vent Flow Damper damper with actuator above Install vent damper or below the vent. with actuator in any position.

  • Page 33: Product Design

    PRODUCT DESIGN Safety 3. Service integrated control module or connecting wiring following the discharge process in Step 2. Use caution Please adhere to the following warnings and cautions when not to recharge your body with static electricity; (i.e., do installing, adjusting, altering, servicing, or operating the fur- not move or shuffle your feet, do not touch ungrounded nace.
  • Page 34 A copy of the National Fuel Gas Code (NFPA 54/ANSI dard of Canada, CAN/CGA B149. NOTE: Also for Z223.1) can be obtained from any of the following: the installers use, Amana ships a Category I Two American National Standards Institute Stage Venting Manual with each two-stage 80% fur- 1430 Broadway nace.
  • Page 35 PRODUCT DESIGN • Exposure to contaminated combustion air will result trical, and drain trap and drain line connections. If the alter- in safety and performance-related problems. Do not nate combustion air intake or vent/flue connections are used install the furnace where the combustion air is ex- on a 90% furnace, additional clearances must be provided to accommodate these connections.
  • Page 36 PRODUCT DESIGN The following steps shall be followed with each appliance connected to NOTE: The GUVA-BX and GUSA-BX model furnaces do the venting system placed in operation, while any other appliances con- not require the use of the Two-Stage Relay Kit (TSRK01) nected to the venting system are not in operation: for use with a single stage thermostat.
  • Page 37 PRODUCT DESIGN Combustion and Ventilation Air Requirements (e) A draft hood or a barometric draft regulator shall be installed in the same room as the equipment served so as to prevent any difference in pressure between the hood or regulator and the WARNING combustion air supply.
  • Page 38 PRODUCT DESIGN (b) All Air from Outdoors: The confined space shall communicate 3. When communicating with the outdoors through horizontal with the outdoors in accordance with one of the following two ducts, each opening shall have a minimum free area of 1 square methods: Two permanent openings, one commencing within inch per 2,000 BTU per hour of total input rating of all equip- 12 inches of the top and one commencing within 12 inches of the...
  • Page 39 If the design and free area is not known, it may be assumed that wood louvers will have 20-25 percent free area Amana Category I 80% Single-Stage furnaces with the ad- and metal louvers and grilles will have 60-75 percent free area.
  • Page 40 PRODUCT DESIGN Masonry Chimneys WARNING Possibility of property damage, personal injury, or death - Damaging condensation can occur inside masonry chimneys when a single fan assisted Category I appli- ance (80% AFUE furnace) is vented without adequate dilution air. Do not connect an 80% furnace to a ma- sonry chimney unless the furnace is common vented with a draft hood equipped appliance, or the chimney is lined with a metal liner or B metal vent.
  • Page 41 PRODUCT DESIGN This inspection is based upon a draft topical report, "Ma- If the chimney does not meet these termination require- sonry Chimney Inspection and Relining", issued by the Gas ments, but all other requirements in the checklist can be Research Institute.
  • Page 42 PRODUCT DESIGN Appliances which burn propane (sometimes referred to as Remember that all appliances must be vented inside the LP (liquefied petroleum)) gas are considered gas-fired ap- liner. Venting one appliance inside the liner and another pliances. appliance outside the liner is not acceptable. Next, use a flashlight and small mirror to sight up the liner.
  • Page 43 PRODUCT DESIGN If dilution air will not be available, the chimney must be re- Under some conditions an Air Command 90 or 95 could be lined (Fix 4). installed rather than an Air Command 80. The Air Com- mand 90 or 95 can be vented horizontally or vertically through PVC pipe.
  • Page 44 PRODUCT DESIGN • Heavier gauge 300 and 400 series stainless steel FURNACE MUST BE LEVEL (90% Furnaces Only) FROM END TO END (90% Furnaces Only) liners were developed for use with oil or solid fuel ALTERNATE VENT/FLUE FURNACE MUST BE LEVEL AND COMBUSTION AIR OR SLIGHTLY TILTED FORWARD appliances.
  • Page 45 PRODUCT DESIGN Propane Gas and/or High Altitude Installations ALTERNATE FLUE AND ALTERNATE FLUE AND Bottom DISCHARGE COMBUSTION AIR PIPE COMBUSTION AIR PIPE Return LOCATIONS LOCATIONS Duct Connection WARNING Side Side Possible death, personal injury or property damage may Return Return Duct Duct occur if the correct conversion kits are not installed.
  • Page 46 PRODUCT DESIGN It is the responsibility of the installer to follow the manufac- PROPER VENT/FLUE AND COMBUSTION AIR PIPING turers’ recommendations and to verify that all vent/flue pip- PRACTICES (90% FURNACES ONLY) ing and connectors are compatible with furnace flue prod- Adhere to these instructions to ensure safe and proper fur- ucts.
  • Page 47 PRODUCT DESIGN • The vent termination of vent pipe run vertically through • Less than 72 inches from the combustion air intake a roof must terminate at least 12 inches above the of another appliance. roof line (or the anticipated snow level) and be at least •...
  • Page 48 PRODUCT DESIGN For upright installations, externally mount the rubber el- Non-Direct Vent Installations bow to the vent/flue coupling using a worm gear hose clamp. A minimum of one 90° elbow must be installed on the com- Secure field supplied vent/flue piping to the rubber elbow bustion air intake “coupling”...
  • Page 49 PRODUCT DESIGN upright installation uses the standard intake location, or a CAUTION horizontal installation uses the alternate air intake location. This elbow will guard against inadvertent blockage of the Be sure not to damage internal wiring or other compo- air intake. nents, when reinstalling coupling and screws.
  • Page 50 PRODUCT DESIGN Vent/Flue Pipe Terminations (90% Furnaces Only) Horizontal vent/flue pipe terminations should be as shown in the following figure. Refer to Vent/Flue Pipe and Com- The vent/flue pipe may terminate vertically, as through a bustion Air Pipe - Termination Locations section in this roof, or horizontally, as through an outside wall.
  • Page 51 PRODUCT DESIGN GUVA Model Furnaces DIRECT VENT (DUAL PIPE) PIPING (90% FURNACES Direct Vent (Dual Pipe) Venting Table ONLY) Maximum Allowable Length of Vent/Flue Pipe & Combustion Direct vent installations require both a combustion air in- Air Intake Pipe (ft) Pipe take and a vent/flue pipe.
  • Page 52 PRODUCT DESIGN Horizontal terminations should be as shown in the follow- 12" MINIMUM ing figure. Refer to Vent/Flue Pipe and Combustion Pipe - 3" MINIMUM 24" MAXIMUM Termination Location section in this manual or the installa- VENT/FLUE tion instructions for location restrictions. A 2 3/8" diameter SUPPORT wall penetration is required for 2"...
  • Page 53 1/4" per foot downward slope Concentric Vent Kits HVCK and VCVK are suitable for use toward the drain. with the following Amana 90% efficient furnaces: • Do not trap the drain line in any other location than CONCENTRIC VENT KIT at the drain trap supplied with the furnace.
  • Page 54 PRODUCT DESIGN Alternate Vent/Flue Drain Hose Connections UPRIGHT INSTALLATIONS In an upright installation drain hoses are connected to drain Upright installations using the alternate vent/flue outlet will ports on the rubber elbow and the recouperator coil front require "right-side only" drain hoses to be connected as cover.
  • Page 55 PRODUCT DESIGN HORIZONTAL INSTALLATIONS INDUCED Right Side Down DRAFT BLOWER DRAIN PORT Horizontal installations with the right side down require that HOSE B the drain hoses be connected to the right side front cover FRONT drain port and the rubber elbow drain port. HOSE A COVER PRESSURE...
  • Page 56 PRODUCT DESIGN Gas Supply and Piping Propane Gas Conversion The furnace rating plate includes the approved furnace gas WARNING input rating and gas types. The furnace must be equipped to operate on the type of gas applied. This includes any con- Possible death, personal injury or property damage version kits required for alternate fuels and/or high altitude.
  • Page 57 PRODUCT DESIGN – Rigid metallic pipe and fittings. Natural Gas Capacity of Pipe In Cubic Feet of Gas Per Hour (CFH) – Semi-rigid metallic tubing and metallic fittings. Alu Length of Nominal Black Pipe Size minum alloy tubing must not be used in exterior Pipe in Feet 1/2"...
  • Page 58 PRODUCT DESIGN GAS VALVE MANUAL ALTERNATE SHUT OFF VALVE MANUAL MANIFOLD BURNERS GAS LINE (UPSTREAM FROM SHUT OFF VALVE LOCATION GROUND JOINT (UPSTREAM FROM PIPE UNION) GROUND JOINT PIPE UNION) PLUG IN HEIGHT REQUIRED ALTERNATE BY LOCAL CODE HEIGHT REQUIRED GAS LINE BY LOCAL CODE HOLE...
  • Page 59 PRODUCT DESIGN 3. Pressure drop in lines between regulators, and between Gas Piping Checks second stage regulator and the appliance. Pipe size will Before placing unit in operation, leak test the unit and gas depend on length of pipe run and total load of all appli- connections.
  • Page 60 PRODUCT DESIGN household use. Typically, a 500 gallon tank is ample for an WARNING average four-bedroom home. However, it is best to consult your local propane supplier to ensure the proper sizing for If the information in these instructions is not followed propane storage requirements.
  • Page 61 PRODUCT DESIGN WARNING WARNING In 90% furnace upright upflow installations, the drain To avoid the risk of electrical shock, injury, or death, trap must be mounted on the opposite side of the unit the furnace must be electrically grounded in accor- from the junction box.
  • Page 62 PRODUCT DESIGN On all other 80% & 90% furnaces, accessory wiring con- If it is necessary for the installer to supply additional line nections are to be made through the 1/4" quick connect voltage wiring to the inside of the furnace, the wiring must terminals provided on the furnace integrated control mod- conform to all local codes, and have a minimum tempera- ule.
  • Page 63 PRODUCT DESIGN Thermostat Thermostat Single-Stage Heating Single-Stage Heating with with Single-Stage Cooling Single-Stage Cooling Furnace Integrated Furnace Integrated DEHUM Control Module TWIN Control Module Twinning Communication [Optional] Remote Remote Condensing Unit Condensing Unit (Single-Stage Cooling) (Single-Stage Cooling) Single-Stage Heating with Single-Stage Cooling Single-Stage Heating with Single-Stage Cooling NOTE: To apply a single-stage heating thermostat, the Typical Field Wiring for Single-Stage Gas Furnaces...
  • Page 64 PRODUCT DESIGN Two-Stage Heating/ Thermostat Wiring - 80% GUIV-CA/DX & 90% GUVA- Two-Stage Cooling AX Two-Stage Variable Speed Furnaces Thermostat Indicate connection options. NOTES: As a two-stage furnace, the furnace’s integrated control Refer to Circulator Blower Timings and module and/or circulator blower interface board provide ter- Speeds Cooling Operation and minals for both "W1"...
  • Page 65 PRODUCT DESIGN T-Stat selection jumper in Thermostat single-stage thermostat TSTAT Two-Stage Heating position. TSTAT with Single-Stage Cooling DIP switch position 3: ON DIP switch position 3: OFF Furnace Integrated DEHUM Delay Period: 10 minutes. Delay Period: 5 minutes. TWIN Control Module Single-Stage Thermostat Application (GUSA-BX and GUVA-BX Models) Remote...
  • Page 66 PRODUCT DESIGN GUIV-CA/DX & GUVA-AX Two-Stage Variable Speed Furnace Thermostat Wiring Reference Chart Furnace Circulator Blower Operation Option Thermostat Connection Connection Options Mode During Call From Thermostat Ref. On Two-Stage From Room 24 Volts HOT Integrated Thermostat Control Module On Two-Stage From Room 24 Volts COMMON Integrated...
  • Page 67 COOL HEAT ADJUST NORM Space provisions on the control panel have been made to fasten the Amana FFK03A Fossil Fuel Control Board on the DEHUMIDIFICATION TEST LED (GREEN) GUIV-CA/DX or GUVA-AX Two-Stage Variable Speed Fur- nace Models only. Refer to the following FFK03A Fossil Fuel Mounting Kit Location figure.
  • Page 68 PRODUCT DESIGN 1. In any application: Connect the correct motor leads to the COOL, LO HEAT, HI HEAT, and PARK terminals. If high heating speed equals If "G" from the thermostat is connected to "G" on the cooling speed, use the jumper wire provided. All unused motor furnace two-stage integrated control module , then the leads that are not connected to "PARK"...
  • Page 69 PRODUCT DESIGN manual for airflows). The cooling speed was set to "C Minus" so the cooling-based continuous fan speeds are CFM LED (RED) 743 CFM (Option A) or 644 CFM (Option B). Because, the cooling-based continuous fan speed is lower, it should be selected.
  • Page 70 PRODUCT DESIGN CIRCULATOR BLOWER TIMINGS If “Y” from the thermostat is connected to "Y/Y2" on the air circulation motor interface board, then the following on and off sequences will occur. Single Stage 80% & 90% Furnaces and 80% Two Stage Furnaces Air Circulator Blower Operation All items in this section refer to the air circulation blower, 100 %...
  • Page 71 PRODUCT DESIGN Guide dimples locate the side and bottom return cutout lo- BOTTOM RETURN AIR FILTER SIZES cations. Use a straight edge to scribe lines connecting the Cabinet Width Filter Size (Inches) Filter Area (in2) dimples. Cut out the opening on these lines. An undersized 16 1/2 14 X 25 X 1 opening will cause reduced airflow.
  • Page 72 PRODUCT DESIGN Minimum Filter Requirement (in Permanent Filters Model Airflow Requirements (Nominal) 600 CFM 800 CFM 1000 CFM 1200 CFM 1400 CFM 1600 CFM 2000 CFM G(C/U)CA045--30 188 * ---- ---- ---- G(C/U)CA070--30 ---- 282 * 282 * 282 * ---- ---- G(C/U)CA070--40...
  • Page 73 PRODUCT DESIGN Minimum Filter Requirement (in Disposable Filters Model Airflow Requirements (Nominal) 600 CFM 800 CFM 1000 CFM 1200 CFM 1400 CFM 1600 CFM 2000 CFM G(C/U)CA045--30 376 * ---- ---- ---- G(C/U)CA070--30 ---- 564 * 564 * 564 * ---- ---- G(C/U)CA070--40...
  • Page 74 PRODUCT DESIGN ADDITIONAL FILTERING ACCESSORIES AIR FLOW CENTRAL RETURN External Filter Rack Kit (EFR01) GRILLE The external filter rack kit is intended to provide a location EXTERNAL external to the furnace casing, for installation of a perma- FILTER nent filter on upflow model furnaces. The rack is designed to RACK KIT mount over the indoor blower compartment area of either side panel, and provide filter retention as well as a location...

  • Page 75: System Operation

    SYSTEM OPERATION NORMAL SEQUENCE OF OPERATION Cooling Mode The normal operational sequence in cooling mode is as (80% or 90% Models with White-Rodgers 50A50 or follows: Heatcraft HSI 1-1A Integrated Ignition Control) 1. R and Y thermostat contacts close, initiating a call for Power Up cool.
  • Page 76 SYSTEM OPERATION HEATING TIMING CHART FOR WHITE-RODGERS 50A50 AND HEATCRAFT HSI 1-1A INTEGRATED IGNITION CONTROL OPERATION Air Circulator Blower OPEN Gas Valve CLOSED Ignitor CLOSED Pressure Switch OPEN Induced Draft Blower Thermostat (Call for Heat) Seconds 17 21 24 COOLING TIMING CHART FOR WHITE-RODGERS 50A50 AND HEATCRAFT HSI 1-1A INTEGRATED IGNITION CONTROL OPERATION Indoor Fan Outdoor Fan...
  • Page 77 SYSTEM OPERATION ABNORMAL OPERATION 3. Pressure Switch Stuck Closed. If the control senses the pressure switch is closed when the induced draft (80% or 90% Models with White-Rodgers 50A50 or blower is off, it waits until the fault is corrected. The di- Heatcraft HSI 1-1A Integrated Ignition Control) agnostic light code for this problem is two short flashes The following presents the probable causes of questionable...
  • Page 78 SYSTEM OPERATION NORMAL SEQUENCE OF OPERATION Cooling Mode The normal operational sequence in cooling mode is as (80% or 90% Models with White-Rodgers 50A55 or follows: Heatcraft HSI-2 Integrated Ignition Control) 1. R and Y thermostat contacts close, initiating a call for Power Up cool.
  • Page 79 SYSTEM OPERATION HEATING TIMING CHART FOR WHITE-RODGERS 50A55 AND HEATCRAFT HSI-2 INTEGRATED IGNITION CONTROL OPERATION Air Circulator Blower OPEN Gas Valve CLOSED Ignitor CLOSED Pressure Switch OPEN Induced Draft Blower Thermostat (Call for Heat) 60,90, Seconds circ 120 or Fixed eEat Ignitor Warm Up Period on Delay:...
  • Page 80 SYSTEM OPERATION ABNORMAL OPERATION 4. Pressure Switch Stuck Open. If, after the induced draft blower is energized, the pressure switch does not close, (80% or 90% Models with White-Rodgers 50A55 or the control will keep the induced draft blower on and wait Heatcraft HSI-2 Integrated Ignition Control) for the switch to close.
  • Page 81 SYSTEM OPERATION NOTE: There is a twenty minute lockout if the pressure NOTE: There is a one hour lockout if either the primary or switch has tripped five times during a single call for heat. auxiliary limit has tripped five times during a single call for heat.
  • Page 82 Troubleshooting Chart for 50A55 & HSI-2 Integrated Ignition Controls Symptoms of Associated Cautions and Abnormal Red LED Code Fault Description(s) Possible Causes Corrective Action Notes Operation (See Note 2) - Furnace fails to operate. - No 115 V power to furnace, or no - Manual disconnect switch OFF, door - Assure 115 V and 24 V power to furnace and - Turn power OFF prior to repair.
  • Page 83 Troubleshooting Chart for 50A55 & HSI-2 Integrated Ignition Controls Symptoms of Associated Cautions and Abnormal Red LED Code Fault Description(s) Possible Causes Corrective Action Notes Operation (See Note 2) - Furnace fails to operate. - Polarity of 115 V AC power to furnace or - Review wiring diagram.
  • Page 84 SYSTEM OPERATION NORMAL SEQUENCE OF OPERATION Cooling Mode The normal operational sequence in cooling mode is as (80% Models with White-Rodgers 50A52 Radiant Sense follows: Ignition Control) 1. R and Y thermostat contacts close, initiating a call for Power Up cool.
  • Page 85 SYSTEM OPERATION HEATING TIMING CHART FOR WHITE-RODGERS 50A52 RADIANT SENSE IGNITION CONTROL Air Circulator Blower OPEN Gas Valve CLOSED Ignitor OPEN Pressure Switch CLOSED Induced Draft Blower Thermostat (Call for Heat) T+45 T = 17 Seconds (Minimum) - 90 Seconds (Maximum) Normal Operation, T = 17 Seconds or Slightly Longer COOLING TIMING CHART FOR WHITE-RODGERS 50A52 RADIANT SENSE IGNITION CONTROL...
  • Page 86 SYSTEM OPERATION ABNORMAL OPERATION 8. Interruption of Power Supply. If the line voltage power is interrupted, the gas valve closes. It will remain closed (80% Models with White-Rodgers 50A52 Radiant Sense until line voltage power is restored and a low voltage call Ignition Control) for heat occurs at the room thermostat.
  • Page 87 Electronic air cleaner terminals are energized with the circulator blower. On some Amana models, the high heat air circulator speed may be the same as the low heat circulator speed. These models are factory shipped to be within the rise range on both stages with the same air circulator speed.
  • Page 88 SYSTEM OPERATION Cooling Mode Fan Only Mode The normal operational sequence in cooling mode is as The normal operational sequence in fan only mode is as follows: follows: 1. R and Y thermostat contacts close, initiating a call for 1 R and G thermostat contacts close, initiating a call for cool.
  • Page 89 SYSTEM OPERATION HEATING TIMING CHARTS FOR WHITE-RODGERS 50A51-215 TWO-STAGE INTEGRATED IGNITION CONTROL OPERATION GUIS/GCIS Example 1: Continuous Call For Low Stage Heat Only High Circulator Blower Gas Valve Ignitor PS2 Closed PS1 Closed Pressure Open Switches High Induced Draft Blower High Thermostat 60, 90...
  • Page 90 SYSTEM OPERATION HEATING TIMING CHARTS FOR WHITE-RODGERS 50A51-215 TWO-STAGE INTEGRATED IGNITION CONTROL OPERATION GUIS/GCIS Example 3: Initial Call For Low Heat, Change In Call To High Heat Call Change to High Heat High Circulator Blower Gas Valve Ignitor PS2 Closed Pressure PS1 Closed Switches...
  • Page 91 SYSTEM OPERATION COOLING TIMING CHART FOR WHITE-RODGERS 50A51-215 TWO-STAGE INTEGRATED IGNITION CONTROL OPERATION Indoor Fan Outdoor Fan Compressor Thermostat Seconds Rev. 1...
  • Page 92 SYSTEM OPERATION ABNORMAL OPERATION 3. Pressure Switch Stuck Closed. If the control senses that either pressure switch is closed when the induced (80% Two Stage Models with White-Rodgers 50A51-215 draft blower is off, it waits until the fault is corrected. The Integrated Ignition Control) diagnostic light code for this problem is two short flashes The following presents the probable causes of questionable...
  • Page 93 SYSTEM OPERATION NORMAL SEQUENCE OF OPERATION 11. If the two-stage thermostat changes the call from high heat to low heat, the control will immediately switch the (80% Two-Stage Variable Speed Models with White- induced draft blower motor to low speed and switch the Rodgers 50A51-225 Integrated Ignition Control) flow rate on the gas valve to low.
  • Page 94 SYSTEM OPERATION Cooling Mode Fan Only Mode The normal operational sequence in cooling mode is as The normal operational sequence in fan only mode is as follows: follows: 1. R and Y thermostat contacts close, initiating a call for 1 R and G thermostat contacts close, initiating a call for cool.
  • Page 95 SYSTEM OPERATION HEATING TIMING CHARTS FOR WHITE-RODGERS 50A51-225 TWO-STAGE INTEGRATED IGNITION CONTROL OPERATION Example 1: Continuous Call For Low Stage Heat Only High Circulator Blower Gas Valve Ignitor PS2 Closed PS1 Closed Pressure Open Switches High Induced Draft Blower High Thermostat 64 94 60, 90...
  • Page 96 SYSTEM OPERATION HEATING TIMING CHARTS FOR WHITE-RODGERS 50A51-225 TWO-STAGE INTEGRATED IGNITION CONTROL OPERATION Example 3: Initial Call For Low Heat, Change In Call To High Heat Call Change to High Heat High Circulator Blower Gas Valve Ignitor PS2 Closed Pressure PS1 Closed Switches Open...
  • Page 97 SYSTEM OPERATION HEATING TIMING CHARTS FOR WHITE-RODGERS 50A51-235 TWO-STAGE INTEGRATED IGNITION CONTROL OPERATION Example 1: Continuous Call For Low Stage Heat Only High Circulator Blower Gas Valve Igniter PS2 Closed PS1 Closed Pressure Open Switches High Induced Draft Blower High Thermostat 61 91 60, 90...
  • Page 98 SYSTEM OPERATION HEATING TIMING CHARTS FOR WHITE-RODGERS 50A51-235 TWO-STAGE INTEGRATED IGNITION CONTROL OPERATION Example 3: Initial Call For Low Heat, Change In Call To High Heat Call Change to High Heat High Circulator Blower Gas Valve Igniter PS2 Closed PS1 Closed Pressure Open Switches...
  • Page 99 SYSTEM OPERATION COOLING TIMING CHART FOR WHITE-RODGERS 50A51-225 & 50A51-235 TWO-STAGE VARIABLE SPEED INTEGRATED IGNITION CONTROL OPERATION (With "Y" from the Thermostat Connected to "Y" on Integrated Ignition Control) Indoor Fan Outdoor Fan Compressor Thermostat Time (sec) (With "Y" from the Thermostat Connected to "Y/Y2" on Circulator Blower Interface Board) Indoor Fan Outdoor Fan Compressor...
  • Page 100 SYSTEM OPERATION Abnormal Operation 3. Pressure Switch Stuck Closed. A sticking pressure switch can be caused by either a faulty pressure switch, (80% Two-Stage Variable Speed Models with White- faulty wiring, a disconnected hose, or a restricted intake Rodgers 50A51-225 Ignition Control) or flue piping.
  • Page 101 Troubleshooting Chart for 50A51-225 & 50A51-235 Integrated Ignition Controls Symptoms of Associated Cautions and Abnormal Red LED Code Fault Description(s) Possible Causes Corrective Action Notes Operation (See Note 2) - Furnace fails to operate. - Assure 115 V and 24 V power to furnace and - No 115 V power to furnace, or no 24 V - Manual disconnect switch OFF, door switch open, - Turn power OFF prior to repair.
  • Page 102 SYSTEM OPERATION NORMAL SEQUENCE OF OPERATION 9. Circulator blower is energized on the appropriate heat speed following a fixed thirty second blower on delay. (90% Two-Stage Models with White- Rodgers 50M61- Electronic air cleaner terminals are energized with cir- 288 Integrated Ignition Control) culator blower.
  • Page 103 SYSTEM OPERATION Cooling Mode Fan Only Mode The normal operational sequence in cooling mode is as The normal operational sequence in fan only mode is as follows: follows: 1. R and Y thermostat contacts close, initiating a call for 1 R and G thermostat contacts close, initiating a call for cool.
  • Page 104 SYSTEM OPERATION HEATING TIMING CHARTS FOR WHITE-RODGERS 50M61-288 TWO-STAGE INTEGRATED IGNITION CONTROL OPERATION Example 1: Continuous Call For Low Stage Heat Only High Circulator Blower High Gas Valve Igniter PS2 Closed PS1 Closed Pressure Open Switches High Induced Draft Blower High Thermostat (Call for Heat)
  • Page 105 SYSTEM OPERATION HEATING TIMING CHARTS FOR WHITE-RODGERS 50M61-288 TWO-STAGE INTEGRATED IGNITION CONTROL OPERATION Example 3: Initial Call For Low Heat, Change To High Heat Call Change to High Heat High Circulator Blower High Gas Valve Igniter PS2 Closed PS1 Closed Pressure Open Switches...
  • Page 106 SYSTEM OPERATION COOLING TIMING CHART FOR WHITE-RODGERS 50M61-288 TWO-STAGE INTEGRATED IGNITION CONTROL OPERATION Circulator Blower Outdoor Fan Compressor Thermostat (Call For Cool) Time (sec) TIMING CHART FOR NORMAL FAN OPERATION Circulator Blower Thermostat (Call For Fan) Time (sec) Rev. 1...
  • Page 107 SYSTEM OPERATION Abnormal Operation 5. Open Primary, Auxiliary or Rollout Limit. If the limit control opens, the air circulator blower will be turned on (90% Two-Stage Models with White- Rodgers 50M61- until the limit closes. The diagnostic light code for this 288 Ignition Control) problem is four short flashes followed by a pause.
  • Page 108 SYSTEM OPERATION NORMAL SEQUENCE OF OPERATION 9. Circulator blower is energized on the appropriate heat speed following a fixed thirty second blower on delay. (90% Two-Stage Variable Speed Models with White- The circulator blower requires 30 seconds to ramp up to Rodgers 50V61-288 Integrated Ignition Control) full speed.
  • Page 109 SYSTEM OPERATION Cooling Mode Fan Only Mode The normal operational sequence in cooling mode is as The normal operational sequence in fan only mode is as follows: follows: 1. R and YLO or Y thermostat contacts close, initiating a 1. R and G thermostat contacts close, initiating a call for call for cool.
  • Page 110 SYSTEM OPERATION HEATING TIMING CHARTS FOR WHITE-RODGERS 50V61-288 TWO-STAGE INTEGRATED IGNITION CONTROL OPERATION Example 1: Continuous Call For Low Stage Heat Only High Circulator Blower Gas Valve Igniter Pressure PS2 Closed Switches PS1 Closed Open High Induced Draft Blower High Thermostat (Call for Heat) 60, 90...
  • Page 111 SYSTEM OPERATION HEATING TIMING CHARTS FOR WHITE-RODGERS 50M61-288 TWO-STAGE INTEGRATED IGNITION CONTROL OPERATION Example 3: Initial Call For Low Heat, Change To High Heat Call Change to High Heat High Circulator Blower High Gas Valve Igniter PS2 Closed Pressure PS1 Closed Switches Open High...
  • Page 112 SYSTEM OPERATION COOLING TIMING CHARTS FOR WHITE-RODGERS 50V61-288 TWO-STAGE VARIABLE SPEED INTEGRATED IGNITION CONTROL OPERATION Example 1: Continuous Call for Low Stage Cooling Only High Circulator (88% of Low) Blower High Outdoor Fan Compressor High Thermostat (Call for Cool) Time (sec) Example 2: Continuous Call For High Stage Cooling Only High Circulator...
  • Page 113 SYSTEM OPERATION Abnormal Operation 5. Open Primary, Auxiliary or Rollout Limit. If the limit control opens, the air circulator blower will be turned on (90% Two-Stage Variable Speed Models with White- until the limit closes. The diagnostic light code for this Rodgers 50V61-228 Ignition Control) problem is four short flashes followed by a pause.
  • Page 114 Troubleshooting Chart for 50M61-288 and 50V61-288 Integrated Ignition Controls Associated Symptoms of Abnormal Cautions and RED LED Code Fault Descriptions Possible Causes Corrective Action Operation Notes (See Note 2) - Assure 115 V and 24 V power to furnace and integrated - No 115 V power to furnace, or no - Manual disconnect switch OFF, door switch open, control module.
  • Page 115 Troubleshooting Chart for 50M61-288 and 50V61-288 Integrated Ignition Controls Associated Symptoms of Abnormal Cautions and RED LED Code Fault Descriptions Possible Causes Corrective Action Operation Notes (See Note 2) - Furnace fails to operate. - Review wiring diagram. - Polarity of 115 VAC power to furnace or - Polarity of 115 V power is integrated control module is reversed.
  • Page 116 SYSTEM OPERATION OPERATING INSTRUCTIONS PRESSURE REGULATOR OUTLET (MANIFOLD) ADJUSTMENT 1. Close the manual gas valve external to the furnace. PRESSURE TAP (UNDER CAP SCREW 2. Turn off the electrical power supply to the furnace. Honeywell 3. Set room thermostat to lowest possible setting. 4.
  • Page 117 SYSTEM OPERATION GAS VALVE HIGH MANIFOLD REGULATOR ADJUSTMENT ON/OFF SCREW (UNDER CAP) CONTROL LEVER OUTLET (MANIFOLD) IN ON POSITION PRESSURE TAP (SIDE OF VALVE) Inlet Outlet INLET OUTLET INLET PRESSURE TAP OUTLET (MANIFOLD) (SIDE OF VALVE) LOW MANIFOLD PRESSURE TAP REGULATOR ADJUSTMENT (SIDE OF VALVE) PRESSURE REGULATOR...

  • Page 118: 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 METER READS METER READS 120 VOLTS 0 VOLTS of primary to secondary voltage on transformers becomes more important. Polarization has been apparent in the Appliance industry VOLT / OHM VOLT / OHM...

  • Page 119: Maintenance

    MAINTENANCE WARNING WARNING TO AVOID ELECTRICAL SHOCK, INJURY OR DEATH, DISCONNECT THE ELECTRICAL POWER TO THE FUR- DISCONNECT ELECTRICAL POWER BEFORE PER- NACE BEFORE REMOVING THE FILTER OR PERFORM- FORMING ANY MAINTENANCE. ING ANY OTHER MAINTENANCE. CAUTION Maintenance Improper filter maintenance is the most common cause of IF YOU MUST HANDLE THE IGNITOR, HANDLE WITH inadequate heating or cooling performance.
  • Page 120 MAINTENANCE 4. Replace filter and blower compartment door opposite of INDUCED DRAFT AND CIRCULATION BLOWERS removal and turn ON thermostat or electrical power. The bearings in the induced draft blower and circulator blower motors are permanently lubricated by the manufac- turer.
  • Page 121 MAINTENANCE FLAME SENSOR (QUALIFIED SERVICER ONLY) Under some conditions, the fuel or air supply can create a nearly invisible coating on the flame sensor. This coating acts as an insulator, causing a drop in the flame sensing signal. If this occurs, a qualified servicer must carefully clean the flame sensor with steel wool.

  • Page 122: Servicing

    SERVICING TEST EQUIPMENT EXAMPLE: GUCA090AX40 Proper test equipment for accurate diagnosis is as essen- INPUT: 92,000 BTU/HR tial as regulator hand tools. OUTPUT CAP: 84,000 The following is a must for every service technician and Should the figure you calculated not fall within five (5) per- service shop.
  • Page 123 SERVICING 1 Thousand 1 Million 100 Thousand 10 Thousand CUBIC Quarter FEET Foot Foot 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...
  • Page 124 SERVICING Complaint 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 •...
  • Page 125 SERVICING SERVICING SECTION INDEX S-1 Checking Voltage S-2 Checking Wiring S-3 Checking Thermostat, Wiring, and Anticipator 126-127 S-4 Checking Transformer and Control Circuit S-5 Checking Primary Limit Control 127-128 S-6 Checking Auxiliary Limit Control 129-130 S-7 Checking Flame Rollout Control 130-131 S-8 Checking Pressure Control 131-132...
  • Page 126 SERVICING S-1 CHECKING VOLTAGE S-3 CHECKING THERMOSTAT, WIRING AND AN- TICIPATOR WARNING S-3A Thermostat and Wiring Disconnect Electrical Power Supply: WARNING 1. Remove the burner door on 80% furnace or blower com- partment door on 90% furnace to gain entry to Junction Disconnect Electrical Power Supply: Box.
  • Page 127 SERVICING If the anticipator current draw is unknown, then an amp WARNING draw should be taken to determine the anticipator setting. Use an amprobe as shown in the following drawing. LINE VOLTAGE NOW PRESENT. 3. Use a voltmeter, check voltage across terminals R and 10 TURNS OF THERMOSTAT WIRE C.
  • Page 128 SERVICING WARNING Disconnect Electrical Power Supply: STYLE 1 & 3 1. Remove burner compartment door to gain access to the primary limit. 2. Remove low voltage wires at limit control terminals. 3. With an ohmmeter, test between these two terminals as shown in the following drawing.
  • Page 129 SERVICING S-6 CHECKING AUXILIARY LIMIT CONTROL If this limit control opens, the air circulation blower and in- duced draft blower will run continuously on models with White- All the 80% and 90% furnaces use an additional limit switch Rodgers 50A50, 50A51 or Heatcraft HSI 1-1A ignition con- required for safety control of high temperature within the fur- trol.
  • Page 130 SERVICING The control is designed to open should a flame roll out oc- WARNING cur. An over firing condition or flame impingement on the heat shield may also cause the control to open. If the rollout To avoid possible fire, only reset the auxiliary limit control opens, the air circulation blower and vent blower will control once.
  • Page 131 SERVICING c. If voltage is measured on both sides of the control INDUCED DRAFT BLOWER the wiring to gas valve or valve is a fault. PRESSURE SWITCH 3. After check and/or replacement of rollout switch, rein- PRESSURE SWITCH stall burner compartment door and verify proper unit op- HOSE OPEN TO eration.
  • Page 132 SERVICING 7. Begin to restrict the flue outlet until the pressure control NOTE: The motor in these units will move more air under trips - cycling OFF the burner. Also a blocked drain test higher static conditions than a similar sized unit using a will need to be performed until the coil cover pressure PSC motor.
  • Page 133 SERVICING Power AC to DC Inverter Blower Conditioning Conversion Motor HVAC System Control INPUTS 24 Volts A/C Compressor On/Hi/Low Motor Fan On Control Reversing Valve Aux./Emergency Heat Capacity Select Outputs CFM Demand ECM/ICM CONTROL FLOW CHART NOTE: An inductor (Power Correction Factor Choke) is re- WARNING quired when powering the 3/4 and 1 horsepower motors with 115 volts.
  • Page 134 Troubleshooting Chart for ECM/ICM Variable Speed Air Circulator Blower Motors Symptoms of Cautions and Abnormal Fault Description(s) Possible Causes Corrective Action Notes Operation - Motor rocks slightly - This is normal start-up for ---- ---- ---- when starting. variable speed motor. - Check 115 Vac power at motor.
  • Page 135 SERVICING 4. Observe the flat end of the motor control module cast- ing and located the two standard ¼" hex head bolts. OUT - OUT + Remove these bolts from the motor while holding the G (fan) control module. Do not remove the two torx head ADJUST +/- screws.
  • Page 136 SERVICING 13. The installation is now complete. Reapply power to the 3. Set an ohmmeter on its highest ohm scale and connect furnace and verify that the new motor control module is the leads to the capacitor. working properly. Good Condition - indicator swings to zero and For complete troubleshooting information on the variable slowly returns toward infinity.
  • Page 137 SERVICING 80% Furnaces: Should read between 50 to 200 ohms. WARNING 90% GUCA,GCCA and GUVA-AX Model Furnaces: Should read between 50 to 300 ohms for mini ignitor part Disconnect Electrical Power Supply: number 20165701, used in initial production of GUCA 1.
  • Page 138 SERVICING The ignition control is a combination electronic and electro- BK-3 wire on GUCA and GCCA models, or RD-15 and mechanical device and is not field repairable. Complete unit BK-3 wires on GUVA and GUSA models) and neutral. must be replaced. No voltage - replace ignition control.
  • Page 139 SERVICING ally reduces the "ON" time of the ignitor. The effect is that The ground wire must run from the furnace all the way back the ignitor operates at a cooler temperature. The learning to the electrical panel. Proper grounding can be confirmed routine will eventually reduce the ignitor "ON"...
  • Page 140 SERVICING S-14 CHECKING FLAME RECTIFICATION WARNING FLAME SENSOR A flame sensing device is used in conjunction with the igni- LINE VOLTAGE NOW PRESENT. tion control module to prove combustion. If proof of flame 4. Place the unit into a heating cycle. is not present the control will de-energize the gas valve and 5.
  • Page 141 SERVICING NOTE: Any bending, twisting, or distortion of the electrical WARNING tabs on the sensor will adversely affect the calibration of the switch and result in unacceptable performance of the Disconnect Gas and Electrical Power Supply: sensor. In checking main burners, look for signs of rust, oversized Refer to the Radiant Sense System Wiring Diagram in and undersized carry over ports restricted with foreign ma- GUIB/GCIB Technical Manual for details.
  • Page 142 SERVICING S-17 HIGH ALTITUDE APPLICATION (USA) 3. Connect a calibrated water manometer (or appropriate gas pressure gauge) at either the gas valve inlet pres- When these furnaces are installed at high altitude, the ap- sure tap or the gas piping drip leg as shown in the fol- propriate High Altitude Orifice or Pressure Switch Kit must lowing two figures.
  • Page 143 SERVICING WARNING WARNING Disconnect Electrical Power and Shut Off Gas Supply: LINE VOLTAGE NOW PRESENT. 6. Disconnect manometer after turning off gas at manual 3. Turn ON the gas and electrical power supply and oper- shutoff valve. Reinstall plug before turning on gas to fur- ate the furnace.
  • Page 144 SERVICING 4. Remove the cap screw from the high stage manifold 5. Using a 3/32" Allen wrench, increase low fire manifold pressure regulator. pressure by adjusting the low stage manifold regulator so the furnace will light and carryover. 5. Using a 3/32" Allen wrench, adjust the high stage mani- 6.
  • Page 145 SERVICING S-20 CHECKING FOR FLASHBACK NOTE: Both readings may be taken simultaneously and read directly on the manometer if so desired. If an air con- Flashback will also cause burning in the burner venturi, but ditioning coil or Electronic Air Cleaner is used in conjunc- is caused by the burning speed being greater than the gas- tion with the furnace, the readings must also include these air flow velocity coming from a burner port.
  • Page 146 SERVICING S-22 CHECKING TEMPERATURE RISE 3. Subtract the return air temperature from the supply air temperature to determine the air temperature rise. Allow The more air (CFM) being delivered through a given furnace, adequate time for thermometer readings to stabilize. the less the rise will be;...

  • Page 147: Accessory Wiring Diagrams

    ACCESSORY WIRING DIAGRAMS VT 02 N.C. N.O. NORMAL SERVICE N.O. N.C. MOTOR N.O. N.C. VENT DAMPER LOAD HIGH LINE VOLTAGE JUNCTION COMBUSTION BLOWER Point to Point Wiring FURNACE COMMON VENT KIT- CVK4-7 (80% Furnaces with White-Rodgers 50A50 Integrated Ignition Control) This wiring diagram is for reference only.
  • Page 148 ACCESSORY WIRING DIAGRAMS COOL-H PARK P ARK LINE -H E2 8 E2 7 E1 3 HE AT-H EAC-H X FMR-H HUM-H E2 0 E1 6 E1 8 E1 4 LINE-N HIM- N EAC- N XFMR -N E1 0 CIR- N E1 1 OF F VT 02...
  • Page 149 ACCESSORY WIRING DIAGRAMS WHT (with terminal) * WHT (without terminal) * Fan/LED Sensor Twinning Control Heat Speed Cool FLASH 1 = FURNACE 1 FAULT Furnace 2 FLASH 2 = FURNACE 2 Y88FA-3 Speed SIGNAL FLASH 3 = BOTH TWINNING FAN/LED T'Stat Connections SENSOR CONTROL...
  • Page 150 This wiring diagram is for reference only. Not all wiring is as shown above, refer to the appropriate wiring diagram for the unit being serviced. (For use with Amana Heat Pumps in conjunction with 80% or 90% Single-Stage or Two-Stage Furnaces)
  • Page 151 ACCESSORY WIRING DIAGRAMS White Wire Blue Wire Black Wire INTEGRATED FURNACE CONTROL TIME DELAY TWO-STAGE RELAY KIT - TSRK01 This wiring diagram is for reference only. Not all wiring is as shown above, refer to the appropriate wiring diagram for the unit being serviced. (For use only with GUIV-CA/DX or GUVA-AX Two-Stage Furnaces) Rev.
  • Page 152 ACCESSORY WIRING DIAGRAMS GREEN BLACK DE-HUMIDISTAT WHITE WHITE - RODGERS DE-HUMIDISTAT %RH Thermostat Connections BLOWER Y/Y2 R1 DEHUM INTERFACE BOARD Y/Y2 EM/W2 W1 JW03 VSPD ADJUST COOL HEAT NORM TEST CUT TO ENABLE DEHUMIDIFY DE-HUMIDISTAT - DEHUM1 This wiring diagram is for reference only. Not all wiring is as shown above, refer to the appropriate wiring diagram for the unit being serviced.
  • Page 153 ACCESSORY WIRING DIAGRAMS GREEN BLACK DE-HUMIDISTAT WHITE WHITE - RODGERS DE-HUMIDISTAT %RH DEHUM TWIN 4 3 21 CUT FOR DEHUM 4 3 21 TSTAT WHITE RODGERS ON S1 LO HEAT HI HEAT EAC COOL PARK LINE XFMR CIRC XFMR LINE LO HEAT HI HEAT COOL PARK...

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