Model and Manufacturing numbers listed on pages 4 & 5. Service Instructions 48" 90% Condensing Gas Furnaces GUC, GUD, GUX, GCC, GCD, GDC & Accessories AIRCOMMAND HI EFFICIENCY 90GASFURNACE AIRCOMMAND HI EFFICIENCY 90GASFURNACE DE SI GN CE RT I F I E D CE RTIFIE 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.
INDEX Important Safety Information ................................................................................... 3 Product Identification ............................................................................................... 4-16 Furnace Specifications ............................................................................................ 17-29 Blower Performance Specifications ........................................................................ 30-35 Combustion and Ventilation Air .
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. Products should be serviced only by a qualified service technician who is familiar with the safety procedures required in the repair and who is equipped with the proper tools, parts, testing instruments and the appropriate service manual.
PRODUCT IDENTIFICATION The model and manufacturing number are used for positive identification of component parts used in manufacturing. At which time engineering and manufacturing changes take place where interchangeability of components are affected, the manufacturing number will change. It is very important to use the model and manufacturing numbers at all times when requesting service or parts information.
PRODUCT IDENTIFICATION The model and manufacturing number are used for positive identification of component parts used in manufacturing. At which time engineering and manufacturing changes take place where interchangeability of components are affected, the manufacturing number will change. It is very important to use the model and manufacturing numbers at all times when requesting service or parts information.
PRODUCT IDENTIFICATION G U C 045 B 50 B Product Type Design Series G: Gas Furnace A: B: C: Supply Type U: Upflow Airflow Capability C: Counterflow 25: 30: 35: 40: 50: D: Counterflow/Horizontal Furnace Type 2.5 Tons 3.0 Tons 3.5 Tons 4.0 Tons 5.
PRODUCT IDENTIFICATION FOR YOUR SAFETY READ BEFORE OPERATING WARNING: If you do not follow these instructions explosion may result causing property damage, personal injury or loss of life. A. This appliance does not have a pilot. It is equipped with an ignition device which automatically lights the burner. Do not try to light the burner by hand. B. BEFORE OPERATING smell all around the appliance area for gas.
PRODUCT IDENTIFICATION FOR YOUR SAFETY READ BEFORE OPERATING LIRE AVANT DE METTRE EN MARCHELIRE WARNING: If you do not follow these instructions AVERTISSEMENT: Quiconque ne respecte pas á explosion may result causing property damage, personal injury or loss of life. la lettre les instructions dans le présent manuel risque de déclecher un incendie ou une explosion entraînant des dammages matériels, des lésions corporelles ou la perte de vies humaines. A. This appliance does not have a pilot.
PRODUCT IDENTIFICATION FOR YOUR SAFETY READ BEFORE OPERATING LIRE AVANT DE METTRE EN MARCHELIRE WARNING: If you do not follow these instructions AVERTISSEMENT: Quiconque ne respecte pas á explosion may result causing property damage, personal injury or loss of life. la lettre les instructions dans le présent manuel risque de déclecher un incendie ou une explosion entraînant des dammages matériels, des lésions corporelles ou la perte de vies humaines. A. This appliance does not have a pilot.
PRODUCT IDENTIFICATION FOR YOUR SAFETY READ BEFORE OPERATING LIRE AVANT DE METTRE EN MARCHELIRE WARNING: If you do not follow these instructions AVERTISSEMENT: Quiconque ne respecte pas á explosion may result causing property damage, personal injury or loss of life. la lettre les instructions dans le présent manuel risque de déclecher un incendie ou une explosion entraînant des dammages matériels, des lésions corporelles ou la perte de vies humaines. A. This appliance does not have a pilot.
PRODUCT IDENTIFICATION Left Side View 3/4 Front View 28-1/8 28 20-1/8 A F Gas Supply Electrical Hole Hole-Low Voltage 1-5/8 B 3/4 3/4 C 6-5/8 E Supply Electrical Hole-Line Voltage Right Side View 4-3/4 Supply Electrical Hole-Low Voltage ® Hea ting ¡ Air Conditio nin g A hig her s tandar d o f co m for t 48 5-3/8 38-3/4 Gas Supply Hole 41-3/8 6-5/8 38-1/4 23 38-3/4 14 Side Knock Out 28-3/4 Condensate Drain 1-5/8 1-5/8 Side Knock Out 16-1/2 (Left or Right Side) D Bottom Knoc
PRODUCT IDENTIFICATION Top View Combustion Air Inlet Gas Supply Hole Electrical Hole Line Voltage Flue Outlet 4-1/4 1-3/4 2 4-3/8 1-1/8 2-1/2 C E Left Side View 3/4 28-1/8 28 20-1/8 Front View A B 3/4 2-3/8 3/4 Gas Supply Electrical Hole Supply Hole-Low Voltage Right Side View 6-5/8 4-3/4 1-5/8 Supply Electrical Hole-Low Voltage AIRCOMMAND HIEFFICIENCY90GASFURNACE 48 Electrical Hole-Line Voltage 5-7/8 38-1/4 Gas Supply Hole 40 6-5/8 23 33-3/4 38-3/4 14 Side KO 28-3/4 16-1/2
PRODUCT IDENTIFICATION ACCESSORIES 28-1/8" A 20-1/4" 3/4" C 2" 3/4" 2-3/8" 28-3/4" 38-3/4" 38-1/4" 41-3/8" 41-3/8" 48" 6-5/8" 5-3/8" Electrical Hole "Low Voltage" Electrical Holes "Low Voltage" 1-5/8" A Ra ythe on Compan y Supply Supply Gas Supply Hole 14-7/8" Gas Supply Hole 4-3/4" 6-5/8" B Counterflow Left Side View 5/8" Counterflow Front View Counterflow Right Side View COUNTERFLOW FURNACE DIMENSIONS FURNACE A B C MODEL 16-1/2 15-7/8 15 GDC045 COUNTERFLOW FURNACE DIMENSIONS FURN
PRODUCT IDENTIFICATION COUNTERFLOW SUBBASE Sub-Base Gasket D Floor 1" Min. Plenum Furnace Front C 2" 3/4" F E Front View Plenum 3/4" A 3/4" A 4-7/16" B B Side View F G E Counterflow subbase required when GCC,GCD & GDC furnaces are installed directly on wooden floor.
PRODUCT IDENTIFICATION ACCESSORIES MEDIA AIR CLEANER MAC1 SPECIFICATIONS CAPACITY 600-2000CFM MEDIA SERVICE LIFE 12 MO.NOMINAL MEDIA LISTING UL CLASS 2 DIMENSIONS A 7-1/4 B 25 C 22-1/8 D 22-5/8 E 17-11/16 RESISTANCE CFM INCHES W.C. 600 .04 800 .05 1000 .09 1200 .12 1400 .15 1600 .18 1800 .22 2000 .27 All dimensions are in inches. A B C E MEDIA AIR CLEANER USED ON MODELS ALL GAS FURNACES D ELECTRONIC AIR CLEANER EAC5 SPECIFICATIONS 3 RATED CAPACITY 2000 CFM (3400 M /HR) MAX. PRESSURE DROP .13 in. w.g.
PRODUCT IDENTIFICATION ACCESSORIES EXTERNAL FILTER RACK KIT 23.567 SLOTS IN FILTER CLEAR SCREWS ON UNIT BLOWER DECK SCREWS 14.
FURNACE SPECIFICATIONS MODEL Btuh Input (US) GUC045B30A GUC045B30B GUC070B30A GUC070B30B GUC070B40A GUC070B40B GUC090B35A GUC090B35B GUC090B50A GUC090B50B GUC115B50A GUC115B50B 45,000 70,000 70,000 90,000 90,000 115,000 Output (US) 43,000 65,000 65,000 83,000 84,000 107,000 Input (CAN) 45,000 70,000 70,000 90,000 90,000 115,000 Output (CAN) 43,400 66,400 66,400 85,700 85,700 107,500 High Alt Input (CAN) Output (CAN) A.F.U.E.
FURNACE SPECIFICATIONS MODEL Btuh Input (US) Output (US) GUC045B30C GUC070B30C GUC070B40C GUC090B35C GUC090B50C GUC115B50C 45,000 70,000 70,000 90,000 90,000 115,000 43,000 65,000 65,000 83,000 84,000 107,000 Input (CAN) 45,000 70,000 70,000 90,000 90,000 115,000 Output (CAN) 43,400 66,400 66,400 85,700 85,700 107,500 High Alt Input (CAN) 40,500 63,000 63,000 81,000 81,000 103,500 39,100 59,800 59,800 77,100 77,100 96,800 Output (CAN) 93.0% 91.1% 91.1% 92.
FURNACE SPECIFICATIONS MODEL Btuh Input (US) Output (US) GUC045C30C GUC045X30A GUC070C30C GUC070X30A GUC070C40C GUC070X40A GUC090C35C GUC090X35A GUC090C50C GUC090X50A GUC115C50C GUC115X50A 45,000 70,000 70,000 90,000 90,000 115,000 43,000 65,000 65,000 83,000 84,000 107,000 Input (CAN) 45,000 70,000 70,000 90,000 90,000 115,000 Output (CAN) 43,400 66,400 66,400 85,700 85,700 107,500 High Alt Input (CAN) 40,500 63,000 63,000 81,000 81,000 103,500 39,100 59,800 59,800
FURNACE SPECIFICATIONS MODEL Btuh Input (US) Output (US) GUC045X30B GUC070X30B GUC070X40B GUC090X35B GUC090X50B GUC115X50B 45,000 70,000 70,000 90,000 90,000 115,000 42,900 65,300 65,300 85,000 85,000 107,800 Input (CAN) 45,000 70,000 70,000 90,000 90,000 115,000 Output (CAN) 43,400 66,400 66,400 85,700 85,700 107,500 High Alt Input (CAN) 40,500 63,000 63,000 81,000 81,000 103,500 39,100 59,800 59,800 77,100 77,100 96,800 Output (CAN) 95.3% 93.3% 93.3% 94.
FURNACE SPECIFICATIONS MODEL Btuh Input (US) GCC045B30A GCC045B30B GCC070B30A GCC070B30B GCC070B40A GCC070B40B GCC090B40A GCC090B40B GCC090B50A GCC090B50B GCC115B50A GCC115B50B 45,000 70,000 70,000 90,000 90,000 115,000 Output (US) 42,000 65,000 65,000 84,000 84,000 106,000 Input (CAN) 45,000 70,000 70,000 90,000 90,000 115,000 Output (CAN) 42,000 65,000 66,000 85,000 85,000 108,000 High Alt Input (CAN) Output (CAN) A.F.U.E.
FURNACE SPECIFICATIONS MODEL Btuh Input (US) Output (US) GCC045C30C GCC045X30A GCC070C30C GCC070X30A GCC070C40C GCC070X40A GCC090C35C GCC090X35A GCC090C50C GCC090X50A GCC115C50C GCC115X50A 45,000 70,000 70,000 90,000 90,000 115,000 43,000 65,000 66,000 84,000 84,000 105,000 Input (CAN) 45,000 70,000 70,000 90,000 90,000 115,000 Output (CAN) 43,000 67,000 67,000 86,000 86,000 108,000 High Alt Input (CAN) 40,500 63,000 63,000 81,000 81,000 103,500 38,700 60,300 60,300
FURNACE SPECIFICATIONS MODEL Btuh Input (US) Output (US) GUD045B30A GUD070B30A GUD070B40A GUD090B35A GUD090B50A GUD115B50A 45,000 70,000 70,000 90,000 90,000 115,000 43,000 65,000 65,000 83,000 84,000 107,000 Input (CAN) 45,000 70,000 70,000 90,000 90,000 115,000 Output (CAN) 43,400 66,400 66,400 85,700 85,700 107,500 High Alt Input (CAN) 40,500 63,000 63,000 81,000 81,000 103,500 39,100 59,800 59,800 77,100 77,100 98,800 Output (CAN) 94.8% 93.2% 93.2% 92.
FURNACE SPECIFICATIONS MODEL Btuh Input (US) GUD045C30A GUD045X30A GUD070C30A GUD070X30A GUD070C40A GUD070X40A GUD090C35A GUD090X35A GUD090C50A GUD090X50A GUD115C50A GUD115X50A 115,000 45,000 70,000 70,000 90,000 90,000 Output (US) 43,000 65,000 65,000 84,000 84,000 107,000 Input (CAN) 45,000 70,000 70,000 90,000 90,000 115,000 Output (CAN) 43,700 66,400 66,400 85,500 85,500 109,700 High Alt Input (CAN) 40,500 63,000 63,000 81,000 81,000 103,500 39,300 59,800 59,800
FURNACE SPECIFICATIONS MODEL Btuh Input (US) Output (US) GUD045X30B GUD070X30B GUD070X40B GUD090X35B GUD090X50B GUD115X50B 45,000 70,000 70,000 90,000 90,000 115,000 43,000 65,700 65,700 84,300 85,100 107,600 Input (CAN) 45,000 70,000 70,000 90,000 90,000 115,000 Output (CAN) 43,000 65,700 65,700 85,000 85,100 107,600 High Alt Input (CAN) 40,500 63,000 63,000 81,000 81,000 103,500 38,700 59,100 59,100 76,600 76,600 96,900 Output (CAN) 95.6% 93.8% 93.8% 94.
FURNACE SPECIFICATIONS MODEL Btuh Input (US) Output (US) GUX045B30A GUX045X30A GUX070B30A GUX070X30A GUX070B40A GUX070X40A GUX090B35A GUX090X35A GUX090B50A GUX090X50A GUX115B50A GUX115X50A 45,000 70,000 70,000 90,000 90,000 115,000 43,600 67,000 67,000 86,000 87,000 110,000 Input (CAN) 45,000 70,000 70,000 90,000 90,000 115,000 Output (CAN) 43,400 67,600 68,200 87,000 87,300 111,100 High Alt Input (CAN) 40,500 63,000 63,000 81,000 81,000 103,500 39,600 60,800 61,400
FURNACE SPECIFICATIONS MODEL Btuh Input (US) Output (US) GUX045X30B GUX070X30B GUX070X40B GUX090X35B GUX090X50B GUX115X50B 45,000 70,000 70,000 90,000 90,000 115,000 43,600 67,100 67,100 86,200 86,200 109,600 Input (CAN) 45,000 70,000 70,000 90,000 90,000 115,000 Output (CAN) 43,600 67,100 67,100 86,200 96,200 109,600 High Alt Input (CAN) 40,500 63,000 63,000 81,000 81,000 103,500 39,200 60,400 60,400 77,600 77,600 98,600 Output (CAN) 96.9% 95.9% 95.9% 95.
FURNACE SPECIFICATIONS MODEL Btuh Input (US) Output (US) GDC045X30B GDC070X30B GDC070X40B GDC090X40B GDC090X50B GDC115X50B 46,000 69,000 69,000 92,000 92,000 115,000 43,300 65,600 65,500 87,000 87,200 107,700 Input (CAN) 46,000 69,000 69,000 92,000 92,000 115,000 Output (CAN) 43,100 65,000 65,000 86,700 86,700 107,200 High Alt Input (CAN) 41,400 62,100 62,100 82,800 82,800 103,500 38,800 58,500 58,500 78,000 78,000 96,500 Output (CAN) 93.7% 94.2% 94.2% 94.
FURNACE SPECIFICATIONS MODEL Btuh Input (US) Output (US) GCD070X30B GCD090X40B 69,000 92,000 64,700 85,900 Input (CAN) 69,000 92,000 Output (CAN) 64,300 86,700 High Alt Input (CAN) 62,100 82,800 58,500 78,000 93.6% 94.0% Rated External Static ("w.c.) .12 - .50 .15 - .50 Temperature Rise (°F) 35 - 65 35 - 65 Output (CAN) A.F.U.E. Pressure Switch Trip Point ("w.c) -1.05 -1.30 Blower Wheel (D" x W") 10 x 8 11 x 10 Blower Horsepower 1/3 1/2 Blower Speeds 4 4 Max CFM @ 0.
BLOWER PERFORMANCE SPECIFICATIONS MODEL GUC045_30_ GUC070_30_ GUC070_40_ GUC090B35A GUC090B35C GUC090C35C GUC090X35A GUC090_50_ GUC115_50_ MODEL (Htg.
BLOWER PERFORMANCE SPECIFICATIONS MODEL GCC045_30_ GCC070_30_ GCC070_40_ GCC090_40_ GCC090_50_ GCC115_50_ MOTOR SPEED HIGH MED LOW HIGH MED MED-LO LOW HIGH MED MED-LO LOW HIGH MED MED-LO LOW HIGH MED MED-LO LOW HIGH MED MED-LO LOW TONS AC External Static Pressure, Inches Water Column @ 0.5" 0.2 0.3 0.4 0.5 0.6 ESP CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise 3.0 2.5 2.0 3.0 2.5 2.0 1.5 4.0 3.5 3.5 3.0 4.0 3.5 3.0 2.5 4.0 3.5 3.0 2.5 5.0 4.5 4.0 3.
BLOWER PERFORMANCE SPECIFICATIONS MODEL GUD045_30A GUD070_30A GUD070_40A GUD090_35A GUD090_50A GUD115_50A MODEL (Htg.
BLOWER PERFORMANCE SPECIFICATIONS MODEL MOTOR SPEED HIGH MED LOW HIGH MED GUX070_30_ MED-LO LOW HIGH MED GUX070_40_ MED-LO LOW HIGH MED GUCX090_35_ MED-LO LOW HIGH MED GUX090_50_ MED-LO LOW HIGH MED GUX115_50_ MED-LO LOW GUX045_30_ MODEL (Htg.
BLOWER PERFORMANCE SPECIFICATIONS MODEL (Htg. Speed As Shipped) GDC045X30B (LOW) GDC070X30B (HIGH) GDC070X40B (MED) GDC090X40B (MED) GDC090X50B (MED) GDC115X50B (HIGH) MODEL (Htg. Speed As Shipped) GCD045X30B (HIGH) GCD090X40B (MED) MOTOR SPEED HIGH MED LO HIGH MED MED-LO LO HIGH MED MED-LO LO HIGH MED MED-LO LO HIGH MED MED-LO LO HIGH MED MED-LO LO MOTOR SPEED HIGH MED MED-LO LOW HIGH MED MED-LO LOW TONS AC External Static Pressure, Inches Water Column @ 0.5" 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.
BTU OUTPUT vs TEMPERATURE RISE CHART 100 BLOWER PERFORMANCE SPECIFICATIONS 600 CFM 90 700 80 800 TEMPERATURE RISE 900 1000 70 1100 1200 60 1400 1600 50 1800 2000 2200 2400 CFM 40 30 FORMULAS BTU OUTPUT = CFM x 1.08 x RISE BTU OUTPUT RISE = ÷ CFM 1.08 20 10 35 Rev.
COMBUSTION AND VENTILATION AIR (All Except GUD/GCD Direct Vent Models) WARNING Possible death, personal injury or property damage may occur if the furnace is not provided with enough fresh air for proper combustion and ventilation of flue gases. Most homes require outside air to be supplied to the furnace area. Improved construction and additional insulation in buildings have reduced heat loss by reducing air infiltration and escape around doors and windows.
COMBUSTION AND VENTILATION AIR (All Except GUD/GCD Direct Vent Models) (b) All Air from Outdoors: The confined space shall communicate with the outdoors in accordance with one of the following two methods: Two permanent openings, one commencing within 12 inches of the top and one commencing within 12 inches of the bottom of the enclosure or One permanent opening, commencing within 12 inches of the top of the enclosure where the equipment has clearances of at least 1 inch from the sides and back and 6 inches
COMBUSTION AND VENTILATION AIR (All Except GUD/GCD Direct Vent Models) 5.3.5 Louvers and Grilles: In calculating free area in 5.3.3, consideration shall be given to the blocking effect of louvers, grilles or screens protecting openings. Screens used shall not be smaller than 1/4 inch mesh. If the area through a design of louver or grille is known, it should be used in calculating the size of opening required to provide the free area specified.
COMBUSTION AND VENTILATION AIR (All Except GUD/GCD Direct Vent Models) VENT PIPING - GUC/GCC/GDC/GUX (ALL INSTALLATIONS), AND GUD/GCD (ONE PIPE SYSTEM) Important: The length of the vent pipe affects the performance of the furnace and therefore must be carefully sized. Just as with ductwork, the resistance of the flue pipe is measured in terms of equivalent feet.
COMBUSTION AND VENTILATION AIR (All Except GUD/GCD Direct Vent Models) The following expanded venting tables are for the GUC___X__B, GUD___X__B, GUX___X__B, GDC___X__B and GCD___X__B model furnaces only. These venting tables allow applications with up to eight (8) 90° medium radius elbows and a maximum length greater than 40 feet for some models. The furnace models that utilize these expanded tables are listed at the top of each table.
COMBUSTION AND VENTILATION AIR (All Except GUD/GCD Direct Vent Models) When venting pipe goes through an outside wall, the vent must terminate at least one foot outside to keep moist combustion products away from the structure. The vent termination must be at least three feet above any forced air inlet located within ten feet. It must be at least four feet below, four feet horizontally from or one foot above any door, window, or gravity air inlet into any building.
COMBUSTION AND VENTILATION AIR (All Except GUD/GCD Direct Vent Models) WARNING Cut all vent pipe at right angles. Remove inside and outside burr at each cut. Use cleaner to clean pipe and fitting socket. Use CSA listed cement to fasten pipe and fittings. Follow manufacturers cleaning and cementing instructions carefully to avoid leakage. UPON COMPLETION OF THE FURNACE INSTALLATION, CAREFULLY INSPECT THE ENTIRE FLUE SYSTEM BOTH INSIDE AND OUTSIDE THE FURNACE TO ASSURE IT IS PROPERLY SEALED.
COMBUSTION AND VENTILATION AIR (GUD/GCD Direct Vent Models) COMBUSTION AIR AND VENT PIPING (GUD/GCD DIRECT VENT (TWO PIPE SYSTEM)) General Information and Safety Precautions WARNING FAILURE TO FOLLOW THESE INSTRUCTIONS CAN RESULT IN BODILY INJURY OR DEATH FROM ASPHYXIATION. THEREFORE, CAREFULLY READ AND FOLLOW ALL INSTRUCTIONS GIVEN IN THIS SECTION. THIS APPLIANCE HAS BEEN APPROVED FOR DIRECT VENT INSTALLATION ONLY. COMMON VENTING OF THIS FURNACE WITH ANOTHER APPLIANCE (WATER HEATER, ETC.) IS NOT ALLOWED.
COMBUSTION AND VENTILATION AIR (GUD/GCD Direct Vent Models) tions in cutting, cleaning, and solvent cementing PVC or ABS pipe. WARNING SOLVENT CEMENTS ARE COMBUSTIBLE LIQUIDS AND SHOULD BE KEPT AWAY FROM ALL IGNITION SOURCES (IE: SPARKS, OPEN FLAMES, AND EXCESSIVE HEAT). AVOID BREATHING CEMENT VAPORS OR CONTACT WITH SKIN AND EYES. All 90 degree elbows must be either medium radius (1/4 bend DWV) or long radius (long sweep 1/4 bend DWV) types conforming to ASTM D3311.
COMBUSTION AND VENTILATION AIR (GUD/GCD Direct Vent Models) DO NOT point terminals into window wells, stairwells, alcoves, or other recessed areas. It is preferable for the air intake to terminate on opposite or adjacent sides of the structure from the dryer vent. If this is not practical, maintain a 3 foot clearance (residential laundry) or a 10 foot clearance (commercial laundry). 2. Horizontal Vent/Intake Terminations 90° MEDIUM RADIUS ELBOW VENT 3.
COMBUSTION AND VENTILATION AIR (GUD/GCD Direct Vent Models) SIZING OF EXHAUST VENT AND COMBUSTION AIR INLET PIPES 2-90° ELBOWS MEDIUM RADIUS Consult the following direct vent piping charts to select the proper diameter exhaust and combustion air piping. The vent and air intake piping is sized for each unit model number based on total line length and number of 90° elbows required. Two 45° elbows are equivalent to one 90° elbow.
COMBUSTION AND VENTILATION AIR (GUD/GCD Direct Vent Models) VENT PIPE INSTALLATION 1. Horizontal or Vertical The size of the vent and air intake pipes is determined by the heating capacity of the furnace and the length and number of elbows of the pipe runs. To properly size the pipes, refer to the previous Section. Use only the fittings, primer, and solvent cement which are described on page 43 and 44. An air intake screen (as described on page 45) must be installed.
COMBUSTION AND VENTILATION AIR (GUD/GCD Direct Vent Models) The following four venting tables on this page are for the earlier GUD direct vent (two pipe system) model furnaces only. These venting tables allow applications with up to six (6) 90° medium radius elbows and a maximum length of 40 feet. The furnace models that utilize these expanded tables are listed at the top of each table.
COMBUSTION AND VENTILATION AIR (GUD/GCD Direct Vent Models) Vent and Combustion Air Pipe Diameter for GUD090X__B Direct Vent (Two Pipe System) # of Inside Elbows 1 2 Inside Feet of Straight Pipe Vent Type 5 to 10 10 to 15 15 to 20 20 to 25 25 to 30 30 to 35 35 to 40 40 to 45 45 to 50 50 to 55 55 to 60 60 to 65 65 to 70 70 to 75 75 to 80 80 to 85 Feet Feet Feet Feet Feet Feet Feet Feet Feet Feet Feet Feet Feet Feet Feet Feet Feet Inlet 3" 3" 3" 3" 3" 3" 3" 3" 3"
PRODUCT DESIGN CONDENSATE DRAIN The Air Command 90 and 95 achieves its high efficiency by condensing some of the flue products into a slightly acidic water which must be piped to a drain. A drain well which is shipped with the furnace must be installed on either side of the furnace cabinet. The condensate from the recuperative coil and the induced draft blower flows into this drain well which acts as a trap. No other trap must be used.
PRODUCT DESIGN Length of Pipe in Feet 10 20 30 40 50 60 70 80 90 100 Natural Gas Capacity of Pipe In Cubic Feet of Gas Per Hour (CFH) Nominal Black Pipe Size 1/2" 3/4" 1" 1 1/4" 132 278 520 1050 92 190 350 730 73 152 285 590 63 130 245 500 56 115 215 440 50 105 195 400 46 96 180 370 43 90 170 350 40 84 160 320 38 79 150 305 CHECKING THE GAS PIPING 1 1/2" 1600 1100 980 760 670 610 560 530 490 460 (Pressure 0.5 psig or less and pressure drop of 0.3" W.C.; Based on 0.
PRODUCT DESIGN 3. Pressure drop in lines between regulators, and between second stage regulator and the appliance. Pipe size required will depend on length of pipe run and total load of all appliances. PROPANE PIPING AND TANK SIZING CHARTS Complete information regarding tank sizing for vaporization, recommended regulator settings, and pipe sizing is available from most regulator manufacturers and propane gas suppliers. Tubing Size, O.D.
PRODUCT DESIGN ELECTRICAL WIRING CONTROL MODULE WARNING TO AVOID ELECTRICAL SHOCK, INJURY OR DEATH, DISCONNECT ELECTRICAL POWER BEFORE CHANGING ANY ELECTRICAL WIRING. The wiring harness on this unit is furnished as an integral part of the furnace. Field alteration to comply with electrical codes should not be required.
PRODUCT DESIGN Thermostat Requirements G R Y Y R R C C Y C G G W Furnace Remote Condensing Furnace Unit W Typical Field Wiring (24 VAC Control Circuit) Continuous Fan Operation The furnace control will energize the cooling circulation fan speed when the fan switch on the thermostat is turned to the "ON" position. AIR CIRCULATION FAN TIMING All items in this section refer to the air circulation fan, not to the induced draft fan. The timing sequence for the induced draft fan is not adjustable.
PRODUCT DESIGN GUC, GUD, GUX Upflow Installations Bottom Return Filter Sizes Furnace Model Permanent (Qty), Size Disposable (Qty), Size 045_30 (1) 14x25x1 (2) 16x20x1 070_30 (1) 16x25x1 (2) 16x20x1 070_40 (1) 16x25x1 (2) 16x20x1 090_35 (1) 20x25x1 (2) 20x20x1 090_50 (1) 20x25x1 (2) 20x20x1 115_50 (1) 20x25x1 (2) 20x20x1 Return Air Optional Access Door (See Tables "A" Below) Minimum The sketch below shows how the filter is retained over the bottom return air opening.
PRODUCT DESIGN If preferred, external filter grilles may be used in place of the filters discussed above. If this is done, refer to the following charts for minimum filter sizes for each furnace which will be operated at high speed either heating or cooling. Permanent filters should be sized upon manufacturer's recommendations. Disposable filters should be sized based upon a face velocity of 300 feet per minute or less.
SYSTEM OPERATION NORMAL SEQUENCE OF OPERATION SELF DIAGNOSTIC IGNITION CONTROL (Models with White Rodgers 50E47-170 Control) In this furnace, there may be a red indicator light located on the ignition control board near the MV terminal. This light is designed to help the servicer diagnose potential service problems with either the furnace or the ignition control itself. If the furnace is malfunctioning, and the red light is on continuously, the ignition control is faulty.
SYSTEM OPERATION NORMAL SEQUENCE OF OPERATION (Models with White-Rodgers 50A50-205, 206, 288 or 298 & 50A60-288 Integrated Ignition Control) Power Up The normal power up sequence is as follows: Cooling Mode The normal operational sequence in cooling mode is as follows: 1. R and Y thermostat contacts close, initiating a call for cool. 2. Integrated control module performs safety circuit checks. 1. 115 VAC power applied to furnace. 3. Outdoor fan and compressor are energized. 2.
SYSTEM OPERATION HEATING TIMING CHART FOR WHITE-RODGERS 50A50-205, 206, 288 or 298 & 50A60-288 INTEGRATED IGNITION CONTROL OPERATION ON OFF AIR CIRCULATION BLOWER OPEN CLOSED ON OFF IGNITOR CLOSED OPEN ON OFF 15 90 AIR BLOWER OFF 0 END OF POST PURGE 54 THERMOSTAT OFF 24 AIR BLOWER ON 17 21 GAS VALVE WOULD CLOSE IF FLAME IS NOT PROVEN ON OFF SECONDS 0 THERMOSTAT ON THERMOSTAT END OF TRIAL FOR IGNITION INDUCED DRAFT BLOWER IGNITOR OFF PRESSURE SWITCH GAS VALVE OPEN GAS VALVE Cooling Tim
SYSTEM OPERATION ABNORMAL OPERATION 4. Pressure Switch Stuck Open (Models with White-Rodgers 50A50-205, 206 or 298 Integrated Ignition Control) 1. Internal Control Failure with White-Rodgers Control If the control determines it has an internal fault, it enters a locked-out state, and the diagnostic light will light continuously with no flashes. The control should be replaced. 2.
SYSTEM OPERATION ABNORMAL OPERATION (Models with White-Rodgers 50A50-288 or 50A60-288 Integrated Ignition Control) The following presents the probable causes of questionable furnace operation and how to fix them. Look through the observation window in the blower access door and make a note of the number of flashes in sequence between pauses. Next, refer to the Diagnostic Signal Chart below for an interpretation of the LED signals and to the information in this section for a description of the problem. 1.
SYSTEM OPERATION NORMAL SEQUENCE OF OPERATION (Models with White-Rodgers 50A55-288 Integrated Ignition Control) Power Up The normal power up sequence is as follows: Cooling Mode The normal operational sequence in cooling mode is as follows: 1. R and Y thermostat contacts close, initiating a call for cool. 2. Integrated control module performs safety circuit checks. 1. 115 VAC power applied to furnace. 3. Outdoor fan and compressor are energized. 2. Integrated control module performs internal checks. 4.
SYSTEM OPERATION HEATING TIMING CHART FOR WHITE-RODGERS 50A55-288 INTEGRATED IGNITION CONTROL OPERATION CIRCULATOR BLOWER ON OFF GAS VALVE OPEN CLOSED IGNITER ON OFF PRESSURE SWITCH CONTACTS CLOSED OPEN INDUCED DRAFT BLOWER ON OFF THERMOSTAT ON OFF SECONDS t ign 0 IGNITER WARM UP PERIOD (see note) t circ 0 15 FIXED HEAT ON DELAY: 30 SECONDS 60,90, 120 or 180 NOTE: WHITE-RODGERS INTEGRATED CONTROL MODULE HAS A VARIABLE STANDARD IGNITER WARM UP PERIOD BETWEEN A 17-SECOND MAXIMUM AND A FIV
SYSTEM OPERATION ABNORMAL OPERATION (Models with White-Rodgers 50A55-288 Integrated Ignition Control) The following presents the probable causes of questionable furnace operation and how to fix them. Look through the observation window in the blower access door and make a note of the number of flashes in sequence between pauses. Next, refer to the Troubleshooting Chart on the following pages for an interpretation of the LED signals and to the information in this section for a description of the problem. 1.
Troubleshooting Chart for White-Rodgers 50A55-288 Integrated Ignition Control Symptoms of Abnormal Operation - Furnace fails to operate. and - Integrated control module diagnostic LED provides no signal. - Furnace fails to operate. and - Integrated control module diagnostic LED is lit continuously. - Furnace fails to operate. and - Integrated control module diagnostic LED is flashing two flashes. - Induced draft blower runs continuously with no further furnace operation.
Rev. 3 Troubleshooting Chart for White-Rodgers 50A55-288 Integrated Ignition Control Symptoms of Abnormal Operation - Furnace fails to operate. and - Integrated control module diagnostic LED is flashing six flashes. - Normal furnace operation. but - Interated control module diagnostic LED is flashing seven flashes. - Induced draft and circulator blower run continuously with no further furnace operation. and - Integrated control module diagnostic LED is flashing continuously.
SYSTEM OPERATION HEATING CYCLE In order to illustrate the heating sequence using a induced draft blower, the following has been simplified to give a better understanding of the pressure switch operation. SWITCH HOSE TO INDUCED DRAFT BLOWER HOUSING NC NO C DIAPHRAGM PRESSURE CHAMBER A Ra yt h eo n Co mp a ny AMANA GUC, GCC, GUX & GDC Pressure Switch With furnace in the off position the induced draft blower will not be running.
SYSTEM OPERATION OPERATING INSTRUCTIONS 1. Close the manual gas valve external to the furnace. Pressure Regulator Adjustment (Under Cap Screw) Outlet (Manifold) Pressure Tap Honeywell 2. Turn off the electrical power supply to the furnace. 3. Set room thermostat to lowest possible setting. 4. Remove the door on the front of the furnace. 5. This furnace is equipped with an ignition device which automatically lights the burner. Do not try to light burner by hand. 6.
SYSTEM OPERATION Outlet (Manifold)Pressure Tap (Side of Valve) INLET Gas Valve On/Off Control Lever Outlet (Manifold) Pressure Tap (Side of Valve) OUTLET INLET Inlet Pressure Tap (Side of Valve) Pressure Regulator Adjustment (Under Cap Screw) Gas Valve On/Off Control Lever O F F INLET M 1 P 3 C Pressure Regulator Adjustment (Under Cap Screw) Inlet Pressure Tap (Side of Valve) Robertshaw (Grayson) Model: 7200 Gas Valve On/Off Selector Switch OUTLET Robertshaw (Grayson) Model: 7222 Gas Val
POLARIZATION AND PHASING As more and more electronic's are introduced to the Heating Trade, Polarization of incoming power and phasing of primary to secondary voltage on transformers becomes more important. Incoming Power To instill new working habits for our trade, we recommend that these two items be checked during normal installation and/or service calls.
MAINTENANCE WARNING TO AVOID ELECTRICAL SHOCK, INJURY OR DEATH, DISCONNECT ELECTRICAL POWER BEFORE PERFORMING ANY MAINTENANCE. CAUTION IF YOU MUST HANDLE THE IGNITOR, HANDLE WITH CARE. TOUCHING THE IGNITOR BODY WITH BARE FINGERS, ROUGH HANDLING, OR VIBRATION COULD RESULT IN EARLY IGNITOR FAILURE. ONLY A QUALIFIED SERVICER SHOULD EVER HANDLE THE IGNITOR. Grasp the lower portion of the filter, lift up to disengage it from the lower railing, move towards blower, drop filter down. Pull filter outward.
MAINTENANCE Clean, wash, and dry the permanent filter. Both sides should then be sprayed with a dust adhesive as recommended on adhesive container. Reinstall filter by placing it into the furnace along the side of the blower. Engage filter in the top rail, move towards side of furnace, and drop it into the bottom rail. BE SURE AIRFLOW DIRECTION ARROW POINTS TOWARDS BLOWER.
MAINTENANCE 7. The primary heat exchanger tubes can be cleaned using a round wire brush attached to a length of high grade stainless steel cable, such as drain cleanout cable. Attach a variable speed reversible drill to the other end of the spring cable. Slowly rotate the cable with the drill and insert it into one of the primary heat exchanger tubes. While reversing the drill, work the cable in and out several times to obtain sufficient cleaning. Repeat for each tube. BURNERS 8.
SERVICING TEST EQUIPMENT Proper test equipment for accurate diagnosis is as essential as regulator hand tools. The following is a must for every service technician and service shop. Multiplying the ninety (90) cubic feet by 1025 BTU gives us an input of 92,250 BTUH. Checking the BTU input on the rating plate of the furnace being tested. EXAMPLE: GUC090B35A 1. Dial type thermometers or thermocouple meter (optional) - to measure dry bulb temperature. INPUT: 90,000 BTU/HR 2.
SERVICING 1 0 9 2 8 3 8 2 5 1 Million Quarter Foot 6 9 9 2 8 3 3 7 7 4 0 1 1 9 6 5 4 100 Thousand 1 8 2 3 7 7 4 5 6 6 5 4 1 Thousand 10 Thousand CUBIC FEET One Foot GAS RATE -- CUBIC FEET PER HOUR Seconds for One Revolution 1/4 cu/ft 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 90 82 75 69 64 60 56 53 50 47 45 43 41 39 37 36 34 33 32 31 30 -28 -26 -- Size of Test Dial 1/2 1 2 cu/ft cu/ft cu/ft 5 cu/ft 180 164 150 138 129 120 113
SERVICING Power Failure Blown Fuse Loose Connection Shorted or Broken Wires No Low Voltage Faulty Thermostat Faulty Transformer Poor or High Resistance Ground • • • • • • • Faulty Limit or Roll Out Switch Faulty Flame Sensor Faulty Ignition Control Gas Valve or Gas Supply Shut Off Faulty Induced Draft Blower Broken or Shorted Ignitor Faulty Combustion Relay Dirty Flame Sensor, Low uA Flame Sensor not in Flame, Low uA Faulty Gas Valve Open Auxiliary Limit Improper Air Flow or Distribution Cycling on Limit
SERVICING SERVICING SECTION INDEX S-1 Checking Voltage 78 S-2 Checking Wiring 78 S-3 Checking Thermostat, Wiring, and Anticipator 78-79 S-4 Checking Transformer and Control Circuit 79 S-5 Checking Fan Relay (A/C Models) 79 S-6 Checking Combination Fan and Limit Control 79-80 S-6A Checking Primary Limit Control 80 S-7 Checking Auxiliary Limit Control 80 S-8 Checking Air Circulation Blower Motor or Induced Draft Blower Motor 83 S-9 Checking Capacitor 83 S-9A Resistance Check 83 S-9B Capa
SERVICING S-1 CHECKING VOLTAGE Disconnect Electrical Power Supply: 1. Remove access door from furnace to gain entry to Junction Box. 2. Remove cover from Junction Box and gain access to incoming power lines. With Power ON: WARNING LINE VOLTAGE NOW PRESENT. 3. Using a voltmeter, measure the voltage across the hot and neutral connections. "With Blower Door Installed" 4. No reading - indicates open wiring, open fuse, no power, or etc. from unit to fused disconnect service. Repair as needed. 5.
SERVICING 3-C Cooling Anticipator The cooling anticipator is a small heater (resistor) in the thermostat. During the "OFF" cycle it heats the bimetal element helping the thermostat call for the next cooling cycle. This prevents the room temperature from rising too high before the system is restarted. A properly sized anticipator should maintain room temperature within 1 1/2 to 2 degrees range. Volt / Ohm Meter 4 The anticipator is fixed in the subbase and is not to be replaced.
SERVICING Depending on the individual type of furnace (upflow, counterflow, etc.) will determine as to what the cutout point setting of the control will be. Refer to the chart on page 81 for temperature settings. In all instances the limit control is wired in series with the ignition control. If the temperature within the furnace should exceed this setting, the control will open, de-energizing the ignition control which in turn will open the electrical circuit to the gas valve.
SERVICING Honeywell Combination Fan/Limit Part # M0352917 M0352918 M0352919 M0352920 M0352921 Open Setting (°F) 230 200 180 250 160 Model # GUC045B30A GUC070B30A GUC070B40A GUC090B35A GUC090B50A GUC115B50A Mfg # P9898401F P9898402F P9898403F P9898404F P9898405F P9898406F GUC045B30B GUC070B30B GUC070B40B GUC090B35B GUC090B50B GUC115B50B P1106901F P1106902F P1106903F P1106904F P1106905F P1106906F GUC045B30C GUC070B30C GUC070B40C GUC090B35C GUC090B50C GUC115B50C P1114301F P1114302F P1114303F P1114304F P11
SERVICING T.O.D.
SERVICING AUXILLARY LIMIT SWITCHES PART NUMBER M0352005 OPEN SETTING (°F) 160 GCC___B__A GCC___B__B 1 GCC___C__C GCC___X__A GDC___X__B 1 GCD___X__B 1 S-9A Resistance Check Volt / Ohm Meter C ap ac i to r S-8 CHECKING AIR CIRCULATOR BLOWER MOTOR OR INDUCED DRAFT BLOWER MOTOR WARNING Testing Capacitor Resistance Disconnect Electrical Power Supply: 1.
SERVICING S-10 CHECKING GAS VALVE (Redundant) A combination redundant operator type gas valve which provides all manual and automatic control functions required for gas fired heating equipment is used. The valve provides control of main burner gas flow, pressure regulation, and 100 percent safety shut-off. With Power OFF: 1. Remove wire connections from gas valve terminals. Burner GUD-C Models 2. Using an ohmmeter, test across the gas valve coil terminals, both the redundant and the main valve. 3.
SERVICING A GAS LINE GAS SHUTOFF VALVE GAS STREAM B GAS LINE TO FURNACE OPEN TO ATMOSPHERE The length of Dimension "A" determines included angle of Spray "B". DRIP LEG CAP WITH FITTING DENT OR BURR MANOMETER HOSE GAS STREAM B MANOMETER A dent of burr will cause severe deflection of gas stream. S-13 CHECKING GAS PRESSURE Measuring Inlet Gas Pressure GAS VALVE CONTROL ON/Off SWITCH Gas inlet and manifold pressures should be checked and adjusted in accordance to the type of fuel being consumed.
SERVICING To properly adjust manifold gas pressure on either the GUD or GCD Direct Vent furnace the negative side of the manometer must be connected to the gas valve vent tap hose. Failure to connect both sides of the manometer as shown will result in an overfiring condition. A. CAP OVER ADJUSTMENT SCREW MUST BE IN PLACE WHEN FURNACE IS OPERATING. B. SEE PRESSURE SWITCH DIAGRAM FOR PRESSURE SWITCH HOSE CONNECTIONS. TO MEASURE MANIFOLD PRESSURE CONNECT MANOMETER BETWEEN C AND D. C.
SERVICING S-17 CHECKING TEMPERATURE RISE S-18 CHECKING PRESSURE CONTROL Temperature rise is related to the BTUH output of the furnace and the amount of air (CFM) circulated over the heat exchanger. A pressure control device is used to measure negative pressure at the induced draft blower motor inlet to detect a partial or blocked flue.
SERVICING PRESSURE SWITCH TRIP POINTS AND USAGE CHART MIN. NEG. MIN. NEG. PRESSURE PRESSURE WITH FLUE WITH FLUE NOT FIRING FIRING MAX. NEG. PRESSURE 0 to 4000 ft. 0 to 4000 ft. 0 to 4000 ft. TRIP POINT GUC045B__A GUC045B__B -1.50 -1.20 NA -1.05 C6456506 GUC045B__C GUC045C__C GUC045X__A -1.80 -1.35 NA -1.20 GUC045X__B -1.55 -1.45 NA GUC070B__A GUC070B__B -1.50 -1.05 GUC070B__C GUC070C__C GUC070X__A -1.
SERVICING PRESSURE SWITCH TRIP POINTS AND USAGE CHART MODEL # MIN. NEG. PRESSURE WITH FLUE NOT FIRING MIN. NEG. PRESSURE WITH FLUE FIRING MAX. NEG. PRESSURE AIR BOX PRESSURE SWITCH TRIP POINTS AND USAGE 0 to 4000 ft. 4001 to 7000 ft. 7001 to 10000 ft. 0 to 4000 ft. 0 to 4000 ft. 0 to 4000 ft. TRIP POINT PRESSURE SWITCH TRIP POINT HIGH ALTITUDE KIT GUD045B__A GUD045C__A GUD045X__A -1.65 -1.50 -0.06 -1.20 10207903 -0.90 HAPS08 10207901 -0.70 HAPS09 10207902 GUD045X__B -1.58 -1.
SERVICING PRESSURE SWITCH TRIP POINTS AND USAGE CHART MODEL # MIN. NEG. MIN. NEG. MIN. NEG. MIN. NEG. PRESSURE PRESSURE PRESSURE PRESSURE WITH FLUE WITH FLUE COIL COVER COIL COVER NOT FIRING FIRING NOT FIRING FIRING PRESSURE SWITCH TRIP POINTS AND USAGE 0 to 4000 ft. TRIP POINT TRIP POINT COIL COVER PRESSURE 0 to 4000 ft. PRESSURE SWITCH SWITCH 4001 to 7000 ft. PRESSURE SWITCH TRIP POINT PRESSURE SWITCH HIGH ALTITUDE KIT TRIP POINT PRESSURE SWITCH HIGH ALTITUDE KIT -1.25 11111905 -1.
SERVICING With Power ON: WARNING LINE VOLTAGE NOW PRESENT. 4. Energize furnace for heating cycle. The combustion relay should be energized and the induced draft blower motor will begin to run. The inclined manometer should read approximately negative 1.25" to 2.0" w.c. with no combustion. The inclined manometer used on the recouperator coil cover pressure switch on the GDC model furnace should read approximately negative 0.15" w.c. with no combustion.
SERVICING 5. Place unit in heating cycle, measure current draw of ignitor during preheat cycle. Should read approximately 4 to 5 amps. 4. If above tests are not completed within the prescribed time limit, the control will retry two more times. However, you will have a 60 second delay before the next try and your preheat time will be increased to 55 seconds. After the second retry, if no ignition, the control will go into lockout. To reset, must de-energize control for approximately five (5) seconds.
SERVICING To view the indicator light upon initial inspection of the furnace the blower door switch must be held closed while removing the blower compartment door. The indicator light may then be viewed by looking through the peep hole in the control compartment cover. Failure to hold the door switch closed while removing the blower compartment door will result in the loss of the stored failure code. In most cases recycling the ignition control will result in the same failure code originally displayed.
SERVICING S-23 CHECKING FLAME ROLLOUT SWITCH The protection device is located on the manifold assembly on GUC, GCC, GDC and GUX models (Refer to the following figure Roll-Out Protection Device - All Except GUD & GCD) and on the burner bracket on GUD and GCD models (Refer to the following figure Roll-Out Protection Device GUD & GCD). Flame Roll-Out Protection Device This control is wired is series with the gas valve. The control is designed to open should a flame roll out occur.
WIRING DIAGRAMS 95 Rev. 3 ! WARNING TO AVOID POSSIBLE ELECTRICAL SHOCK, PERSONAL INJURY, OR DEATH, DISCONNECT THE POWER BEFORE SERVICING.
Rev. 3 WIRING DIAGRAMS ! WARNING TO AVOID POSSIBLE ELECTRICAL SHOCK, PERSONAL INJURY, OR DEATH, DISCONNECT THE POWER BEFORE SERVICING.
WIRING DIAGRAMS 97 Rev. 3 ! WARNING TO AVOID POSSIBLE ELECTRICAL SHOCK, PERSONAL INJURY, OR DEATH, DISCONNECT THE POWER BEFORE SERVICING.
Rev. 3 WIRING DIAGRAMS ! WARNING TO AVOID POSSIBLE ELECTRICAL SHOCK, PERSONAL INJURY, OR DEATH, DISCONNECT THE POWER BEFORE SERVICING.
WIRING DIAGRAMS 99 Rev. 3 ! WARNING TO AVOID POSSIBLE ELECTRICAL SHOCK, PERSONAL INJURY, OR DEATH, DISCONNECT THE POWER BEFORE SERVICING.
Rev. 3 WIRING DIAGRAMS ! WARNING TO AVOID POSSIBLE ELECTRICAL SHOCK, PERSONAL INJURY, OR DEATH, DISCONNECT THE POWER BEFORE SERVICING.
WIRING DIAGRAMS 101 Rev. 3 ! WARNING TO AVOID POSSIBLE ELECTRICAL SHOCK, PERSONAL INJURY, OR DEATH, DISCONNECT THE POWER BEFORE SERVICING.
Rev. 3 WIRING DIAGRAMS ! WARNING TO AVOID POSSIBLE ELECTRICAL SHOCK, PERSONAL INJURY, OR DEATH, DISCONNECT THE POWER BEFORE SERVICING.
WIRING DIAGRAMS 103 Rev. 3 ! WARNING TO AVOID POSSIBLE ELECTRICAL SHOCK, PERSONAL INJURY, OR DEATH, DISCONNECT THE POWER BEFORE SERVICING.
Rev.
Y W THERMOSTAT CONNECTIONS 6 R CONTROL COMBUSTION PRESSURE COVER PRESSURE SWITCH (PS1) PRIMARY ROLLOUT LIMIT (RL) SWITCH (PS2) COM G C 5 CAPACITOR (CAP) ** N R R R E G F N N E 0 0 K U N P D D U 1 2 P 3 * C 2 BR-21 M 1 GY-47 BK-6 BK-1 H U M VT-14 GAS VALVE (GV) PRIMARY LIMIT TH HLO HLI 12 9 6 3 11 8 5 2 10 7 4 1 OR-3 WH PS1 C GV NC COMBUSTION BLOWER (CB) CB CAP 6 WH23 VT -55 115V FIELD CONNECT HUMIDIFIER WH-2 BK-3 C DOOR SWITCH DOOR SWITCH (CLOSED WHEN
Rev. 3 Y W THERMOSTAT CONNECTIONS 6 R CONTROL G C PRESSURE SWITCH (PS) PRIMARY ROLLOUT LIMIT (RL) BR BR COM ** VT-14 PRIMARY LIMIT BU-15 GND RL MOTOR TO "HEAT" ** COOLING MOTOR SPEEDS BLOWER SPEED SEE INSTALLATION INSTRUCTIONS TO DETERMINE PROPER COOLING BLOWER SPEED.
! WARNING TYPICAL SCHEMATIC EARLY GUC and GCC MODELS WHITE-RODGERS 50E47 IGNITION CONTROL (Rollout Limit not used on "A" models, Aux Limit not used on GUC models) This schematic is for reference only. Not all wiring is as shown above, refer to the appropriate wiring diagram for the unit being serviced.
Rev. 3 CIRCULATOR BLOWER HUMIDIFIER HUM IND IND NEU EAC EAC NEU R K5b K2 K1b K5a K4 RO2 RO1 TH K1a XFMR HOT LINE HOT 24 VAC 120 VAC XFMR NEU TR C .001 LINE NEU K8 1M K6 FP IGNN IGN GND MV FLAME SENSOR PROBE IGNITOR Y G W K7 1M GAS VALVE MV PS HLO HIGH LIMIT PRESSURE SWITCH ! WARNING TO AVOID POSSIBLE ELECTRICAL SHOCK, PERSONAL INJURY, OR DEATH, DISCONNECT THE POWER BEFORE SERVICING.
TYPICAL SCHEMATIC GDC MODELS WHITE-RODGERS 50A50 INTEGRATED IGNITION CONTROL This schematic is for reference only. Not all wiring is as shown above, refer to the appropriate wiring diagram for the unit being serviced.
Rev. 3 TYPICAL SCHEMATIC GUX070X30BI MODELS WHITE-RODGERS 50A60 INTEGRATED IGNITION CONTROL This schematic is for reference only. Not all wiring is as shown above, refer to the appropriate wiring diagram for the unit being serviced.
SCHEMATICS BU6 OUTDOOR THERMOSTAT BU6 SEE NOTE 1 (RESISTOR) DUAL FUEL ROOM THERMOSTAT OD STA O Y W R C RELAY #2 E L O Y W OR W2 G C/X R B W3 O Y W G C R FURNACE 1 2 R WG C Y SEE NOTE 2 (JUMPER) SEE NOTE 3 (JUMPER) R W G C Y W2 GAS FURNACE THERMOSTAT CONNECTIONS, OR OR SINGLE AND TWO STAGE W1 B FURNACE 1 2 R C G WY FIELD SUPPLIED RELAY TYPICAL OIL FURNACE RCGT T Notes: 1. Resistor must be installed between "W" and "C" if an electronic room thermostat is used.
SCHEMATICS Furnace 1 TH FP HL0 TR R01 R TR P A R K P A R K L I N E X F M R E A C H U M I I N G G N Y2R C I R L I N E X F M R E A C H U M W2R RD -4 RD-2 2 1 2 1 2 1 WH-2 4 4 4 YL-2 WH-6 5 3 5 3 5 3 RD-2 BK-3 BK-3 RD-4 BK -3 RD-2 BK-2 YL-7 BK-2 Furnace 2 TH FP HL0 TR R01 C O O L H E A T P A R K P A R K L I N E X F M R E A C H U M I I N G G N C I R L I N E X F M R E A C H U M G R LOAD LINE CIRCULATOR BLOWER 1 2 W NEUTRAL 120VAC HOT 120VAC Y ON
SCHEMATICS WHT (with terminal) * WHT (without terminal) * BLK Fan/LED Sensor BLK Twinning Control T'Stat Connections G Y W R RED BLK WHT C FAULT SIGNAL RED BLK WHT FLASH 1 = FURNACE 1 FLASH 2 = FURNACE 2 FLASH 3 = BOTH FAN/LED SENSOR INPUTS C (COM) FURNACE R (24V) W (HEAT) T'STAT INPUTS Y (COOL) G (FAN) G (FAN) Y (COOL) FURNACE W (HEAT) T'STAT INPUTS R (24V) C (COM) G Y W R T'Stat Connections Furnace 1 WHT BLK RED C Cool Speed Heat Speed BLK BLK WHT BLK RED (+) (-) FAN/LED SENSOR
