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AFFIX LABEL HERE
INSTALLATION AND SERVICING INSTRUCTIONS
UPFLOW, DOWNFLOW OR HORIZONTAL
TWO STAGE HEAT VARIABLE SPEED
GAS-FIRED NON-CONDENSING
WARM AIR FURNACE
Issue 0527
TABLE OF CONTENTS
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Gas Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Furnace Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Control Board & Variable Speed Motor Fea
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SAFETY The following is a list of safety precautions and their locations in this manual. These safety rules and precautions must be followed when installing this furnace. 1. Use only with type of gas approved for this furnace. Refer to the furnace rating plate. 2. Install this furnace only in a location and position as specified in The Location/Placement Section on page 7 of these instructions. 3. Provide adequate combustion and ventilation air to the furnace space as specified in Air for Combus
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FURNACE SPECIFICATIONS ELECTRICAL UNIT DIMENSIONS VENT MAX. OVER MAX. TEMPERATURE NET DUCT SUPPLY DUCT RETURN SUPPLY MIN. PIPE CURRENT UNIT RISE WEIGHT OPENING OPENING WIRE DIA. PROTECTION AMPS RANGE LBS LENGTH WIDTH HEIGHT MODEL SIZE(AWG) LOW HIGH A B C D E F G H FIRE FIRE AV050B3 29 1/2 13 1/2 38 1/4 11 1/2 20 3/8 12 21 5/8 4 15 9.9 14 30 - 60 40 - 70 105 AV075B3 29 1/2 13 1/2 38 1/4 11 1/2 20 3/8 12 21 5/8 4 15 9.9 14 30 - 60 40 - 70 113 AV100B4 29 1/2 17 38 1/4 15 20 3/8 15 1/2 21 5/8 4 15 1
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BLOWER MOTOR SPECIFICATIONS AND AIRFLOW ADJUSTING DATA Adjusting Airflow HEAT SETTINGS COOL SETTINGS MOTOR BLOWER HEATING CFM @ .50 STATIC COOL CFM @ .50 STATIC MODEL HP WHEEL SETTING SETTING SETTING SETTING COOLING SETTING SETTING SETTING SETTING "A" "B" "C" "D" ADJUSTMENT "A" "B" "C" "D" NORM 1200 1000 800 600 AV050B3 1/2 10 X 6 525 425 325 625 ( + ) 1380 1150 920 690 ( - ) 1020 850 680 510 NORM 1200 1000 800 600 AV075B3 1/2 10 X 6 740 640 540 840 ( + ) 1380 1150 920 690 ( - ) 1020 850 680 510
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FURNACE WIRING SPECIFICATIONS 20571201 Issue 0527 Page 5 of 28
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The furnace cabinet must have an uninterrupted or unbroken electrical ground to minimize personal injury if an electrical fault should occur. The unit must also be electrically grounded in accordance with local codes, or in the absence of local codes, with the latest edition of the (U.S.) National Electrical Code ANSI/NFPA No. 70 or CSA Standard C22.1; Part 1 Canadian Electrical Code, if an external electrical source is utilized. DO NOT use gas piping as an electrical ground. INTRODU
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LOCATION / PLACEMENT Site Selection: This furnace may be located in an attic, closet, basement, crawl space, alcove or suspended from the ceiling of a utility room or basement. Select a location that will meet all requirements for safety, clearances, ventilation and combustion air, ductwork design, gas piping, electrical wiring and venting. Clearances: The following minimum clearances, or greater, must be provided between the furnace and adjacent construction. TABLE 1 MINIMUM INSTALLATION CLEAR
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If the furnace is to be installed in a crawl space, consult local codes. (Use of a concrete pad 1" to 2" thick Do not place combustible material on the furnace is recommended.) jacket. Failure to comply with this warning will If the furnace is to be suspended from the ceiling, it create a fire hazard. will be necessary to use steel pipe straps around each end of the furnace. These straps should be attached to the furnace with sheet metal screws and to the rafters with bolts. The furnace may also
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If the installation area meets the definition of "Unconfined Space" and does not have additional air Do not block the combustion or ventilation air requirements as described, the furnace may be installed openings in the furnace. Any blockage will result in without making special provisions for combustion and improper combustion and may result in a fire ventilation air. hazard or unsafe condition. Whenever this furnace is installed in an area along with one or more gas appliances, the total Btu/h
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Figure 4 When horizontal ducts are used to supply air from the CONFINED SPACE / OUTDOOR AIR outdoors, they must be of the same cross sectional area as the free area of the openings to which they connect. FROM ATTIC The minimum dimension of rectangular air ducts must not be less than 3 inches. Each opening must have a free area of not less than one square inch per 2,000 Btu per hour of total input of all appliances within the "Confined Space". These openings must be located 12 in. from the top an
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DUCTING The proper sizing of warm air ducts is necessary to insure satisfactory heating operation. Ductwork should be in accordance with the latest editions of (U.S.) NFPA-90A (Air Conditioning Systems) and NFPA-90B (Warm Air Heating and Air Conditioning Systems) or Canadian equivalent. Ductwork Recommendation: be of such a size that the heat exchanger can be The supply duct work should be attached to the viewed for possible openings using light assistance or flanged opening provided at
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Filters: When installing the furnace with cooling equipment for Air filters must be used in every installation. For side year round operation, the following recommendations return installations, air filters must be installed external to must be followed for series or parallel air flow: the furnace casing. An external filter rack kit with filter 1. In series flow applications, the evaporator coil is (parts No. 20069901 or Cat. No. 68L75 12 / 15½" x 25" mounted after the furnace in an enclosure in
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vent. If deterioration is discovered, the chimney must Table 4 AUXILIARY DRAFT INDUCERS be repaired or the "B" vent must be replaced. Vent Kit MFR Model * Furnace Input 2. Inspection to ascertain that the vent system is clear Field Controls Co. 50000, 75000, 100000 or SWG-4G 125000 and free of obstructions. Any blockage must be 50000, 75000, 100000 or cleared before installing this furnace. SS1 OR SS1C 125000 Tjernlund Products Inc. 3. Cleaning the chimney or "B" vent if previously used GPAK-J 5
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4. All pipe should be supported using the proper clamps 3. Remove the four (4) screws that secure the and/or straps. These supports should be at least combustion blower adaptor plate to the flue collector every four (4') feet. box, taking care to support the blower assembly so 5. All horizontal runs of pipe should have at least a 1/4" that it does not fall. (in.) per foot of upward slope from the furnace to the 4. Rotate the blower 90° (degrees) clockwise, so that vent terminal. the outlet of th
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CARBON MONOXIDE POISONING HAZARD Failure to follow the steps outlined below for each appliance connected to the venting system being placed into operation could result in carbon monoxide poisoning or death. The following steps shall be followed for each appliance connected to the venting system being placed into operation, while all other appliances connected to the venting system are not in operation: 1. Seal any unused openings in the venting system. 2. Inspect the venting system for proper si
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Figure 11 AUTOMATIC HEAT STAGING JUMPER The unit cabinet must have an uninterrupted or unbroken electrical ground to minimize personal injury if an electrical fault should occur. This may consist of electrical wire or approved conduit when installed in accordance with existing electrical codes. Do not use gas piping as an electrical ground. Failure to follow this warning can result in an electrical shock, fire, bodily harm, or loss of life. When installing optional accessories to this appliance,
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This furnace is manufactured for use with Natural gas and must be converted using the proper LP conversion kit Many soaps used for leak testing are corrosive to for use with LP (Propane) gas. For LP (Propane) gas, a certain metals. Piping must be rinsed thoroughly tank regulator is required to reduce supply pressure to with clean water after leak check has been 12"-13"w.c. For manifold pressure see Table 6. completed. A main manual shut off valve must be used in the gas piping. The shut off type
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Cooling Mode: To determine what CFM the motor is delivering at any The units are factory set for the highest airflow for time, count the number of times the amber LED on the each model. Adjustments can be made to the cooling control board flashes. Each flash signifies 100 CFM; airflow by repositioning the jumper plug marked COOL - count the flashes and multiply by 100 to determine the A, B, C, D (see AirFlow Adjustment Table on page 4) actual CFM delivered (for example: 10 flashes x 100 = based
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STARTUP AND OPERATIONAL CHECKOUT 1. Be sure all electrical power is OFF. 2. Check all wiring using proper wiring diagram on It is not recommended that this furnace be used as inside of the control box cover. a construction heater during any phase of 3. Turn ON the electrical power. construction. Very low return air temperatures, 4. Set the ignition system control switch in the "ON" harmful vapors and operation of the unit with position. clogged or misplaced filters will damage the unit. 5. Set t
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The gas control (Figure 13) has two separate TABLE 5 st pressure regulator adjustment screws, one for 1 stage Gas Rate (Cubic Feet per Hour) nd (marked "LO") and the second one for 2 stage (marked TEST DIAL TEST DIAL "HI"). The adjusting screws are positioned on either Seconds for 1/2 1 2 Seconds for 1/2 1 2 One Cubic Cubic Cubic One Cubic Cubic Cubic side of the barbed fitting. The pressure regulator Revolution Feet Foot Feet Revolution Feet Foot Feet adjustment is sensitive: one turn of the ad
