Page 2 - INDEX
2 Rev. 0 INDEX Important Safety Information ................................................................................. 3 Product Identification ............................................................................................. 4-13 Furnace Specifications ..............................
Page 3 - IMPORTANT NOTICES; AMANA WILL NOT BE RESPONSIBLE FOR ANY INJURY OR; CONSUMER AFFAIRS DEPT.; OR; AMANA HEATING & AIR CONDITIONING; CALL; and ask for; RECOGNIZE SAFETY SYMBOLS, WORDS AND LABELS; WARNING; IMPORTANT INFORMATION
3 Rev. 0 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. Products should be serviced only by a qualified service technicianwho is familiar with the safety procedures required i...
Page 4 - PRODUCT IDENTIFICATION; Note: See servicing section for available kits and usage.
PRODUCT IDENTIFICATION 4 Rev. 0 The model and manuacturing number are used for positive identification of component parts used in manufacturing. Atwhich time engineering and manufacturing changes take place where interchangeability of components are affected, themanufacturing number will change. It ...
Page 7 - MINIMUM CLEARANCES TO COMBUSTIBLE MATERIALS; All dimensions are in inches.
PRODUCT IDENTIFICATION GUCA 7 Rev. 0 NOTES: 1. Installer must supply one or two PVC pipes: one for combustion air (optional) and one for the flueoutlet (required). Vent pipe must be either 2” or 3”in diameter, depending upon furnace input, num-ber of elbows, length of run and installation (1 or2 pip...
Page 8 - Cabinet; Large
PRODUCT IDENTIFICATION GCCA 8 Rev. 0 NOTES: 1. Installer must supply one or two PVC pipes: one for combustion air (optional) and one for the flueoutlet (required). Vent pipe must be either 2” or 3”in diameter, depending upon furnace input, num-ber of elbows, length of run and installation (1 or2 pip...
Page 9 - COMPONENT IDENTIFICATION
PRODUCT IDENTIFICATION 9 Rev. 0 1 Gas Valve 2 Gas Line Entrance (Alternate) 3 Pressure Switch 4 Gas Manifold 5 Combustion Air Intake Connection / “Coupling” 6 Hot Surface Igniter 7 Rollout Limit 8 Burners 9 Flame Sensor 10 Flue Pipe Connection / “Coupling” 11 Flue Pipe (Internal) 12 Combustion Air I...
Page 10 - COIL MATCHES
PRODUCT IDENTIFICATION 10 Rev. 0 A large array of Amana coils are available for use with the new GUCA and GCCA furnaces, in either upflow, counterflow,or horizontal applications. These coils are available in both cased and uncased models, with or without a TXV expansiondevice. These new 90%+ furnace...
Page 11 - COUNTERFLOW FLOOR BASE; EXTERNAL FILTER RACK KIT; Used On Models; GCCA
PRODUCT IDENTIFICATION ACCESSORIES 11 Rev. 0 COUNTERFLOW FLOOR BASE D C B A G F E Floor Base Part Numbers Used On Models A B C D E F G CFB16 GCCA045__30 GCCA070__30 18-9/16 23-3/4 29 17-1/2 16-1/2 15 1-11/32 CFB20 GCCA070__40 GCCA090__40 18-9/16 23-3/4 29 21-1/2 20-1/2 19 1-11/32 CFB24 GCCA090__50 G...
Page 12 - ELECTRONIC AIR CLEANER; EAC5 SPECIFICATIONS; EAC5 ELECTRONIC AIR CLEANER; MEDIA AIR CLEANER; RESISTANCE
PRODUCT IDENTIFICATION ACCESSORIES 12 Rev. 0 ELECTRONIC AIR CLEANER RATED CAPACITY 2000 CFM (3400 MAX. PRESSURE DROP .13 in. w.g. @ CELL WEIGHT (2) 12 lbs. each UNIT WEIGHT 46 lbs. POWER CONSUMPTION 48 watts maximum ELECTRICAL INPUT 120 V , 60 HZ, 1 ELECTRICAL OUTPUT 3.2 MA @ 6200 A 4-1/2 B 24-7/16 ...
Page 13 - CONCENTRIC VENT CONVERSION KIT; CONCENTRIC VENT KIT; HVCK Installation; Horizontal
PRODUCT IDENTIFICATION ACCESSORIES 13 Rev. 0 CONCENTRIC VENT CONVERSION KIT Concentric Vents Kits HVCK and VCVKare suitable for use with the followingAmana 90% efficient furnace products: CONCENTRIC VENT KIT Used On Models GUCAGCCA This kit is not certified for, and must notbe applied to any furnace...
Page 14 - FURNACE SPECIFICATIONS; MODEL
FURNACE SPECIFICATIONS 14 Rev. 0 1. These furnaces are manufactured for natural gas operation. Optional LP Conversion Kits are available to convert to propane gas. 2. When these furnaces are installed at high altitude, the appropriate High Altitude orifice kit must be applied. This is required due t...
Page 16 - BLOWER PERFORMANCE SPECIFICATIONS; For most jobs, about 400 CFM per ton when cooling is desirable.; GUCA Blower Performance
16 Rev. 0 BLOWER PERFORMANCE SPECIFICATIONS 1. CFM in charts is with filters(s). Filters do not ship with this furnace, but must be provided by the installer. If the furnace requires two return filters, this chart assumes both filters are installed. 2. All furnaces ship as high speed cooling. Instal...
Page 19 - COMBUSTION AND VENTILATION AIR; AIR REQUIREMENTS; All Air from Inside the Building: The confined space shall
19 Rev. 0 COMBUSTION AND VENTILATION AIR (DIRECT/NON-DIRECT VENT MODELS) WARNING Property damage, bodily injury, or death may occur ifthe furnace and any other fuel-burning appliances arenot provided with enough fresh air for proper combus-tion and ventilation of flue gases. Most homes requireoutsid...
Page 20 - All Air from Outdoors: The confined space shall be pro-
COMBUSTION AND VENTILATION AIR (DIRECT/NON-DIRECT VENT MODELS) 20 Rev. 0 Equipment Located in Confined Spaces; All Air from Inside Building. See 5.3.3-a (b) All Air from Outdoors: The confined space shall be pro- vided with two permanent openings, one commencing within12 inches of the top and one co...
Page 21 - Vent/Flue Pipe and Combustion Air Pipe; while a; Materials and Joining Methods
21 Rev. 0 COMBUSTION AND VENTILATION AIR (DIRECT/NON-DIRECT VENT MODELS) 4. When ducts are used, they shall be of the same cross- sectional area as the free area of the openings to whichthey connect. The minimum dimension of rectangularair ducts shall not be less than 3 inches. 5.3.4 Specially Engin...
Page 22 - Proper Vent/Flue and Combustion Air Piping Practices
COMBUSTION AND VENTILATION AIR (DIRECT/NON-DIRECT VENT MODELS) 22 Rev. 0 All 90° elbows must be medium radius (1/4 bend DWV) orlong radius (Long sweep 1/4 bend DWV) types conform-ing to ASTM D3311. A medium radius (1/4 bend DWV)elbow measures 3 1/16” minimum from the plane of oneopening to the cente...
Page 23 - Standard Furnace Connections; Standard Connections; CAUTION; Alternate Vent/Flue Location
23 Rev. 0 COMBUSTION AND VENTILATION AIR (DIRECT/NON-DIRECT VENT MODELS) • Less than 36 inches from any building opening orany gas service regulator. For gas service regulatorsin the Province of Ontario, 72 inches. • Less than 72 inches from the combustion air intakeof another appliance. • Directly ...
Page 25 - direct vent installations, secure field-supplied; non-direct vent installations installed horizontally,
25 Rev. 0 COMBUSTION AND VENTILATION AIR (DIRECT/NON-DIRECT VENT MODELS) 6. Upflow and Counterflow units. For direct vent installations, secure field-supplied combustion air intake pipe directly to the air intake cou-pling. (PVC coupling or elbow required on counterflowunits). ADDITIONAL PLUG FROM D...
Page 26 - Vent/Flue Pipe Terminations; Roof Or; Above Highest Anticipated Snow Level
COMBUSTION AND VENTILATION AIR (DIRECT/NON-DIRECT VENT MODELS) 26 Rev. 0 bustion air intake to prevent inadvertent blockage. The teeused in the vent/flue termination must be included whendetermining the number of elbows in the piping system. Unit Input (BTU) Pipe Size (inc.) 1 2 3 4 5 6 7 8 45,000 2...
Page 27 - Vent/Flue and Combustion Air Pipe; Vent/Flue and Combustion Air Pipe Terminations; Vent/Flue Pipe and Combustion Pipe
27 Rev. 0 COMBUSTION AND VENTILATION AIR (DIRECT/NON-DIRECT VENT MODELS) Direct Vent (Dual Pipe) Piping Direct vent installations require both a combustion air in-take and a vent/flue pipe. The pipes may be run horizon-tally and exit through the side of the building or run verti-cally and exit throu...
Page 28 - Horizontal Terminations
COMBUSTION AND VENTILATION AIR (DIRECT/NON-DIRECT VENT MODELS) 28 Rev. 0 SUPPORT STRAPS 90°MEDIUM RADIUSELBOWS 12' MIN. VENT/FLUE TEE SCREEN COMBUSTIONAIR INTAKE. 12' MIN. ABOVE HIGHEST ANTICIPATED SNOW LEVEL 12' MIN. ABOVE HIGHEST ANTICIPATED SNOW LEVEL 3" MIN. 24" MAX. Horizontal Terminati...
Page 29 - Upright Installations; HOSE A; Hose and Tube Identification
29 Rev. 0 CONDENSATE DRAIN LINES AND DRAIN TRAP Upright Installations In an upright installation drain hoses are connected to drainports on the rubber elbow and the recuperator coil frontcover. The drain lines are then routed through the right orleft side panel and into the drain trap secured to the...
Page 30 - Cabinet Width
30 Rev. 0 CONDENSATE DRAIN LINES AND DRAIN TRAP DRAINTRAP FRONT COVER DRAIN PORT TUBE(S) 2 HOSE CLAMPS (5 PLACES) RIGHT SIDE PANEL RUBBER ELBOW DRAIN PORT TUBE 1 SIDE PANEL GROMMET HOLES HOSE B HOSE A RUBBER ELBOW Upright “Standard” Connections Right Side (Upflow Shown, Counterflow Similar) LEFT SID...
Page 31 - Upright Drain Trap Mounting (Left or Right Side Panel)
31 Rev. 0 CONDENSATE DRAIN LINES AND DRAIN TRAP 6. Cut 17 7/8 inches from the long end of Hose B and discard. 7. Secure remaining end of Hose B to exposed end of Tube 1 with a hose clamp. Route hose toward right sidepanel grommet holes. 8. Insert short end of one Tube 2 through rear right side panel...
Page 32 - Horizontal Connections; Long End of Hose B
32 Rev. 0 CONDENSATE DRAIN LINES AND DRAIN TRAP 2. Upflow furnaces Relocate the front cover pressure switch hose connec-tion from the right side (as shipped) pressure tap to theleft (down) side tap. The pressure switch hose must beconnected to the down side to guard against blockeddrain conditions. ...
Page 33 - PRODUCT DESIGN; Safety; Disconnect all power to the furnace. Do not touch the; Product Application
PRODUCT DESIGN 33 Rev. 0 Safety Please adhere to the following warnings and cautions wheninstalling, adjusting, altering, servicing, or operating the fur-nace. WARNING To prevent personal injury or death due to improperinstallation, adjustment, alteration, service or mainte-nance, refer to this manu...
Page 34 - Location Requirements and Considerations
PRODUCT DESIGN 34 Rev. 0 A copy of the National Fuel Gas Code (NFPA 54/ANSIZ223.1) can be obtained from any of the following: American National Standards Institute 1430 Broadway New York, NY 10018 National Fire Protection Association 1 Batterymarch Park Quincy, MA 02269 American Gas Association 1515...
Page 35 - closed; Upflow Counterflow Horizontal
PRODUCT DESIGN 35 Rev. 0 closed non-direct vent furnace has an adequate sup- ply of combustion air, vent from a nearby uncontami-nated room or from outdoors. Refer to the Combus- tion and Ventilation Air Requirements section for de-tails. • If the furnace is used in connection with a coolingunit, in...
Page 36 - Thermostat Influences
PRODUCT DESIGN 36 Rev. 0 Existing Furnace RemovalNote: When an existing furnace is removed from a venting system serving other appliances, the venting system maybe too large to properly vent the remaining attached appli-ances. The following vent testing procedure is reproduced fromthe American Natio...
Page 37 - Recommended Installation Positions; Horizontal Applications and Conditions - Drain Trap; Electrical Connections
PRODUCT DESIGN 37 Rev. 0 Alternate Vent/Flue and Combustion Air ConnectionsIn horizontal installations provisions for alternate flue andcombustion air piping are available for upflow furnaces withleft discharge and counterflow furnaces with right air dis-charge. In these positions the flue and combu...
Page 38 - Disconnect Electrical Power Supply:; Thermostat Diagram
PRODUCT DESIGN 38 Rev. 0 Use a separate fused branch electrical circuit containingproperly sized wire, and fuse or circuit breaker. The fuse orcircuit breaker must be sized in accordance with the maxi-mum overcurrent protection specified on the unit rating plate.An electrical disconnect must be prov...
Page 39 - Accessory Load Specifications; Humidifier; Accessories Wiring; Inlet Gas Supply Pressure; Natural Gas; section located in the
PRODUCT DESIGN 39 Rev. 0 115 Volt Line Connection of Accessories (Humidifierand Electronic Air Cleaner) WARNING To avoid electrical shock, injury or death, disconnectelectrical power before servicing, or changing any elec-trical wiring. The furnace’s integrated control module is equipped withline vo...
Page 40 - Gas Piping Connections
PRODUCT DESIGN 40 Rev. 0 Gas Piping Connections GROMMET IN STANDARD GAS LINE HOLE * * * * * * COUNTERFLOW MANUAL SHUT OFF VALVE (UPSTREAM FROM GROUND JOINT PIPE UNION) ALTERNATE GAS LINE LOCATION PLUG IN ALTERNATE GAS LINE HOLE HEIGHT REQUIRED BY LOCAL CODE GROUND JOINT PIPE UNION DRIP LEG MANIFOLD ...
Page 41 - Propane Gas Conversion
PRODUCT DESIGN 41 Rev. 0 A different pressure switch may be required at high altituderegardless of the BTU/ft 3 content of the fuel used. Refer to S-19 HIGH ALTITUDE APPLICATION (USA) section lo-cated in the SERVICING section of this manual or an Amana distributor for a tabular listing of appropriat...
Page 42 - Propane Gas Tanks and Piping
PRODUCT DESIGN 42 Rev. 0 • Use listed gas appliance connectors in accordancewith their instructions. Connectors must be fully inthe same room as the furnace • Protect connectors and semirigid tubing againstphysical and thermal damage when installed. Ensurealuminum-alloy tubing and connectors are coa...
Page 43 - Propane Gas Piping Charts; Circulating Air and Filters
PRODUCT DESIGN 43 Rev. 0 Refer to the following illustration for typical propane gasinstallations. Propane Gas Installation (Typ.) Propane Gas Piping Charts Sizing Between First and Second Stage Regulator*Maximum Propane Capacities listed are based on 2 psig pressure drop at 10 psig setting. Capacit...
Page 44 - Possible Upright Upflow; Possible Upright Counterflow
PRODUCT DESIGN 44 Rev. 0 To ensure proper unit performance follow the filter sizesgiven in the following filter sizing charts. Nom. Area Nom. Area Size (in²) Size (in²) 045_30 1200 1 24x24x1 576 1 16x25x1 400 070_30 1400 1 25x30x1 750 1 16x25x1 400 070_40 1600 1 25x30x1 800 1 16x25x1 400 090_40 1600...
Page 46 - Heat Off Delay Switches; S p e e d
PRODUCT DESIGN 46 Rev. 0 60 Second Delay 12 ON 90 Second Delay 21 60 180 12 0 90 120 Second Delay 21 180 Second Delay 2 1 DIP Switches Jumper 60 180 12 0 90 60 180 12 0 90 60 180 12 0 90 OFF ON ON OFF ON OFF OFF Heat Off Delay Switches S p e e d W i re Co l o r Low Red M edium Low O range M edium B ...
Page 47 - SYSTEM OPERATION; Normal Sequence of Operation
SYSTEM OPERATION 47 Rev. 0 Normal Sequence of Operation Power UpThe normal power up sequence is as follows: • 115 VAC power applied to furnace. • Integrated control module performs internal checks. • Integrated control module flashes LED one time. • Integrated control module monitors safety circuits...
Page 48 - STANDARD SEVEN-SECOND IGNITER WARM UP PERIOD; WHITE-RODGERS INTEGRATED CONTROL MODULE HAS A; VARIABLE STANDARD IGNITER WARM UP PERIOD BETWEEN; Outdoor Fan
SYSTEM OPERATION 48 Rev. 0 TIMING CHART FOR NORMAL HEATING OPERATION CIRCULATOR BLOWER GAS VALVE IGNITER PRESSURE SWITCH CONTACTS INDUCED DRAFT BLOWER THERMOSTAT ON OFF ON OFF ON OFF ON OFF OPEN CLOSED OPEN CLOSED NOTE: HEATCRAFT INTEGRATED CONTROL MODULE HAS A FIXED STANDARD SEVEN-SECOND IGNITER WA...
Page 49 - Troubleshooting; Diagnostic Chart; Manual power interruption. Interrupt 115 volt power to
SYSTEM OPERATION 49 Rev. 0 Troubleshooting Electrostatic Discharge (ESD) PrecautionsNote: Discharge body’s static electricity before touchingunit. An electrostatic discharge can adversely affect elec-trical components. Use the following precautions during furnace installationand servicing to protect...
Page 50 - TROUBLESHOOTING CHART
SYSTEM OPERA TION 50 Rev. 0 Sheet 1 of 2 TROUBLESHOOTING CHART Notes: 1) Integrated control module will automatically attempt to reset from lock out after one hour. 2) LED flash code will cease if power to the control module is interrupted through the disconnect or door switch. 3) Integrated control...
Page 52 - POLARIZATION AND PHASING; These then should be wired to the furnace accordingly.
POLARIZATION AND PHASING 52 Rev. 0 As more and more electronic's are introduced to the Heat-ing Trade, Polarization of incoming power and phasingof primary to secondary voltage on transformers becomesmore important. Polarization has been apparent in the Appliance industrysince the introduction of th...
Page 53 - MAINTENANCE; ANNUAL INSPECTION
53 Rev. 0 MAINTENANCE WARNING TO AVOID ELECTRICAL SHOCK, INJURY OR DEATH,DISCONNECT ELECTRICAL POWER BEFORE PER-FORMING ANY MAINTENANCE. CAUTION IF YOU MUST HANDLE THE IGNITOR, HANDLE WITHCARE. TOUCHING THE IGNITOR BODY WITH BAREFINGERS, ROUGH HANDLING, OR VIBRATION COULDRESULT IN EARLY IGNITOR FAIL...
Page 54 - BURNERS; Burner Flame
MAINTENANCE 54 Rev. 0 3. Remove filters 4. Remove blower compartment door. Vacuum compart- ment. Replace blower compartment door. 5. Replace filters opposite of removal. 6. Replace access door in ductwork. Horizontal Unit Filter RemovalFilters in horizontal installations are located in the centralre...
Page 55 - SERVICING; TEST EQUIPMENT
SERVICING 55 Rev. 0 TEST EQUIPMENT Proper test equipment for accurate diagnosis is as essen-tial as regulator hand tools. The following is a must for every service technician andservice shop. 1. Dial type thermometers or thermocouple meter (op- tional) - to measure dry bulb temperature. 2. Amprobe -...
Page 56 - GAS RATE - CUBIC FEET PER HOUR
56 Rev. 0 SERVICING GAS RATE - CUBIC FEET PER HOUR GAS RATE -- CUBIC FEET PER HOUR Size of Test Dial Size of Test Dial Seconds for One Revolution 1/4 cu/ft 1/2 cu/ft 1 cu/ft 2 cu/ft 5 cu/ft Seconds for One Revolution 1/4 cu/ft 1/2 cu/ft 1 cu/ft 2 cu/ft 5 cu/ft 10 90 180 360 720 1800 36 25 50 100 200...
Page 57 - SYMPTOM
SERVICING 57 Rev. 0 Complaint No Heat Unsatisfactory Heat POSSIBLE CAUSE DOTS IN ANALYSIS GUIDE INDICATE "POSSIBLE CAUSE" SYMPTOM System Will Not Start Burner Won't Ignite Burner Ignites-Locks Out Burner Shuts Off prior to T'Stat bein g Satisfied Short Cycles Long Cycles Soot and /or Fumes T...
Page 59 - ANTICIPATOR; LINE VOLTAGE NOW PRESENT.; S-3B Heating Anticipator
SERVICING 59 Rev. 0 S-1 CHECKING VOLTAGE Disconnect Electrical Power Supply: 1. Remove blower compartment door from furnace to gain entry to Junction Box. 2. Remove cover from Junction Box to gain access to in- coming power lines. With Power ON: WARNING LINE VOLTAGE NOW PRESENT. 3. Using a voltmeter...
Page 60 - Ignition Control; Checking Heating Anticipator Amp Draw; S-3C Cooling Anticipator; S-5 CHECKING PRIMARY LIMIT CONTROL
60 Rev. 0 SERVICING Ignition Control Heat Anticipator Setting W hite-Rodgers 50A55-288 .70 amps Heatcraft HSI-2 .70 amps GUCA / GCCA If the anticipator current draw is unknown, then an ampdraw should be taken to determine the anticipator setting.Use an amprobe as shown below. Wrap 10 turns of ther-m...
Page 61 - S-6 CHECKING AUXILIARY LIMIT CONTROL; S-7 CHECKING BLOWER MOTOR
SERVICING 61 Rev. 0 4. After completing check and/or replacement of primary limit control, reinstall burner compartment door. 5. Turn on electrical power and verify proper unit opera- tion To aid in identifying these controls, these controls have acolor coded marking on them. Refer to the following ...
Page 62 - S-8 CHECKING CAPACITOR; S-8A Resistance Check; Testing Capacitor Resistance; S-8B Capacitance Test; AMMETER; Testing Capacitance; Disconnect Electrical Power and Shut Off Gas Supply:
62 Rev. 0 SERVICING If the windings do not test continuous or a reading is ob-tained from lead to ground, replace the motor. 5. After completing check and/or replacement of blower motor, reinstall blower compartment door. 6. Turn on electrical power and verify proper unit opera- tion. S-8 CHECKING C...
Page 63 - S-10 CHECKING MAIN BURNERS; S-11 CHECKING ORIFICES
SERVICING 63 Rev. 0 2. Next, remove wire connections from gas valve termi- nals. 3. Using an ohmmeter, test across the gas valve coil ter- minals M1 and C2. Note: Make sure gas valve switch is in the "ON" positionwhen taking reading. 4. Should read approximately 100 Ohms for the White- Rodge...
Page 64 - S-12 CHECKING GAS PRESSURE; Gas Supply Pressure Measurement; Measuring Inlet Gas Pressure
64 Rev. 0 SERVICING 6. After check and/or replacement of orifice(s) reinstall manifold to burner bracket. 7. Turn on gas to furnace and check for leaks. If leaks are found, repair and then reinstall burner compartmentdoor. 8. Turn on electrical power and verify proper unit opera- tion. S-12 CHECKING...
Page 65 - Gas Manifold Pressure Measurement and Adjustment; Measuring Manifold Gas Pressure; CHECKING FOR DELAYED IGNITION
SERVICING 65 Rev. 0 Gas Manifold Pressure Measurement and Adjustment CAUTION To prevent unreliable operation or equipment damage,the gas manifold pressure must be as specified on theunit rating plate. Only minor adjustments should bemade by adjusting the gas valve pressure regulator. Only small vari...
Page 66 - S-15 CHECKING DUCT STATIC; Checking Static Pressure; S-16 CHECKING TEMPERATURE RISE; RETURN; Checking Temperature Rise
66 Rev. 0 SERVICING S-15 CHECKING DUCT STATIC The maximum and minimum allowable external static pres-sures are found in the specification section. These tablesalso show the amount of air being delivered at a given staticby a given motor speed or pulley adjustment. The furnace motor cannot deliver pr...
Page 67 - PRESSURE SWITCH TRIP POINTS AND USAGE CHART
SERVICING 67 Rev. 0 TRIP POINT COIL COVER PRESSURE SWITCH TRIP POINT ID MOTOR PRESSURE SWITCH PRESSURE SWITCH TRIP POINT COIL COVER PRESSURE SWITCH TRIP POINT ID MOTOR PRESSURE SWITCH HIGH ALTITUDE KIT GUCA045AX30 GCCA045AX30 -1.00 -1.05 -0.65 -1.10 -0.37 -0.37 PROD. -0.37 -0.16 HAPS27 20197307 GUCA...
Page 68 - S-17 CHECKING PRESSURE CONTROL
68 Rev. 0 SERVICING S-17 CHECKING PRESSURE CONTROL A pressure control device is used to measure negative pres-sure at the induced draft blower motor inlet to detect a par-tial or blocked flue and also a pressure control device isused to measure negative pressure at the recuperator coilcover to detec...
Page 69 - ORIFICE SIZE AND HIGH ALTITUDE KIT CHART; S-19 CHECKING MINI IGNITER
SERVICING 69 Rev. 0 The following chart give the orifice drill size and high alti-tude kit required for different elevations. High altitude pressure switches and kits are listed on thepage 67 in the Pressure Switch Usage and Trip Point Chart. Note: In Canada, gas furnaces are certified only to 4500f...
Page 70 - CHECKING FLAME SENSOR
70 Rev. 0 SERVICING The indicator light may then be viewed by looking throughthe peep hole in the blower access door. Failure to hold thedoor switch closed while removing the blower compartmentdoor will result in the loss of the stored failure code. In mostcases recycling the ignition control will r...
Page 71 - If absolutely no reading, check for continuity on all com-; S-22 CHECKING FLAME ROLLOUT SWITCH; Rollout Protection Devices; Rollout Protection Devices; Remove burner compartment door to gain access to; Checking Flame Rollout Switch
SERVICING 71 Rev. 0 ing) is established, the hot surface ignitor will be de-energized. 6. The micro-amp reading should be 1 to 4 micro-amps. If the micro-amp reading is less than the minimum speci-fied, check for high resistance wiring connections,coated flame sensor, the distance between the sensor...
Page 72 - HEAT EXCHANGER ASSEMBLY; Used on Models; Removal of Existing Heat Exchanger:
72 Rev. 0 SERVICING a. If no voltage is measured on either side of control it indicates that either the ignition control or wiring tocontrol is the problem. b. If voltage is measured on one side of the control and not the other it indicates the control is open. c. If voltage is measured on both side...
Page 73 - Reinstallation of New Heat Exchanger:
SERVICING 73 Rev. 0 Reinstallation of New Heat Exchanger: Note: Before installing new heat exchanger assembly, in-spect gasket along inside rails. If the gasket needs replac-ing, install the new pieces of gasket supplied with kit. 1. Slide new heat exchanger into cabinet and secure with screws remov...
Page 74 - WIRING DIAGRAMS
WIRING DIAGRAMS T O A V O ID PO S S IBL E E L E C T R IC A L S H O C K , P E R S O N A L IN J U R Y ,O R D E A T H , D IS C O NN E C T T H E P O W E R BE F O R E S E R V IC IN G . WARNING ! 74 Rev. 0 GUCA___AX__ HO T SU R F AC E HO T SURF ACE HO T SU R F AC E 1 F L A S H = 2 F L ASH E S = PR ESSU R ...
Page 76 - SCHEMATICS; TYPICAL SCHEMATIC; INE
TO A V OI D P O SSI B L E ELEC TRI C A L SHOC K, PERS O NAL IN JURY , OR D E ATH, DI SCON NECT THE PO W E R B E FORE SERVI C ING. WA RN ING ! SCHEMATICS 76 Rev. 0 TYPICAL SCHEMATIC GUCA MODEL FURNACES 10207709 WR50A55 INTEGRATED IGNITION CONTROL This schematic is for reference only. Not all wiring i...
Page 78 - FURNACE TWINING KIT - FTK03A
TO A V OI D P O SSI B L E ELEC TRI C A L SHOC K, PERS O NAL IN JURY , OR D E ATH, DI SCON NECT THE PO W E R B E FORE SERVI C ING. WA RN ING ! SCHEMATICS 78 Rev. 0 FURNACE TWINING KIT - FTK03A This schematic is for reference only. Not all wiring is as shown above, refer to the appropriate wiring diag...
