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Allied Downflow or Horizontal 2 Stage Heat Variable Speed Gas Fired Non-Condensing Warm Air Furnace - page 1
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 Furnace Specifications ............................... 3 Furnace Wiring Specifications ..................... ...
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Allied Downflow or Horizontal 2 Stage Heat Variable Speed Gas Fired Non-Condensing Warm Air Furnace - page 2
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/Pla ...
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Allied Downflow or Horizontal 2 Stage Heat Variable Speed Gas Fired Non-Condensing Warm Air Furnace - page 3
FURNACE SPECIFICATIONS MODEL UNIT DIMENSIONS DUCT SUPPLY OPENING DUCT RETURN OPENING VENT PIPE DIA. MAX. OVER CURRENT PROTECTION MAX. UNIT AMPS ELECTRICAL SUPPLY MIN. WIRE SIZE(AWG) TEMPERATURE RISE RANGE NET WEIGHT LBS LENGTH WIDTH HEIGHT A B C D E F G H LOW FIRE HIGH 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 ...
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Allied Downflow or Horizontal 2 Stage Heat Variable Speed Gas Fired Non-Condensing Warm Air Furnace - page 4
BLOWER MOTOR SPECIFICATIONS AND AIRFLOW ADJUSTING DATA Adjusting Airflow MODEL MOTOR HP BLOWER WHEEL HEAT SETTINGS COOL SETTINGS HEATING CFM @ .50 STATIC COOL CFM @ .50 STATIC SETTING "A" SETTING "B" SETTING "C" SETTING "D" COOLING ADJUSTMENT SETTING "A" SETTING "B" SETTING "C" S ...
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Allied Downflow or Horizontal 2 Stage Heat Variable Speed Gas Fired Non-Condensing Warm Air Furnace - page 5
FURNACE WIRING SPECIFICATIONS 20571201 Issue 0527 Page 5 of 28 ...
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Allied Downflow or Horizontal 2 Stage Heat Variable Speed Gas Fired Non-Condensing Warm Air Furnace - page 6
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 C2 ...
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Allied Downflow or Horizontal 2 Stage Heat Variable Speed Gas Fired Non-Condensing Warm Air Furnace - page 7
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. Cleara ...
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Allied Downflow or Horizontal 2 Stage Heat Variable Speed Gas Fired Non-Condensing Warm Air Furnace - page 8
If the furnace is to be installed in a crawl space, consult local codes. (Use of a concrete pad 1" to 2" thick is recommended.) If the furnace is to be suspended from the ceiling, it 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 ...
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Allied Downflow or Horizontal 2 Stage Heat Variable Speed Gas Fired Non-Condensing Warm Air Furnace - page 9
If the installation area meets the definition of "Unconfined Space" and does not have additional air requirements as described, the furnace may be installed without making special provisions for combustion and ventilation air. Whenever this furnace is installed in an area along with one or more gas appliances, the total Btu/hr input of al ...
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Allied Downflow or Horizontal 2 Stage Heat Variable Speed Gas Fired Non-Condensing Warm Air Furnace - page 10
Figure 4 CONFINED SPACE / OUTDOOR AIR FROM ATTIC Figure 5 CONFINED SPACE / OUTDOOR AIR FROM ATTIC & CRAWL SPACE For an attic installation it is important to keep insulation 12" or more away from any furnace openings. Some types of insulating materials may be combustible. When horizontal ducts are used to supply air from the outdoors, they ...
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Allied Downflow or Horizontal 2 Stage Heat Variable Speed Gas Fired Non-Condensing Warm Air Furnace - page 11
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: The supply duct work should be at ...
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Allied Downflow or Horizontal 2 Stage Heat Variable Speed Gas Fired Non-Condensing Warm Air Furnace - page 12
Filters: Air filters must be used in every installation. For side return installations, air filters must be installed external to the furnace casing. An external filter rack kit with filter (parts No. 20069901 or Cat. No. 68L75 12 / 15½" x 25" sizes and 20069902 or Cat. No. 68L76 for 15½" / 19" x 25" sizes) is available a ...
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Allied Downflow or Horizontal 2 Stage Heat Variable Speed Gas Fired Non-Condensing Warm Air Furnace - page 13
vent. If deterioration is discovered, the chimney must be repaired or the "B" vent must be replaced. 2. Inspection to ascertain that the vent system is clear and free of obstructions. Any blockage must be cleared before installing this furnace. 3. Cleaning the chimney or "B" vent if previously used for venting a solid fuel burni ...
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Allied Downflow or Horizontal 2 Stage Heat Variable Speed Gas Fired Non-Condensing Warm Air Furnace - page 14
4. All pipe should be supported using the proper clamps and/or straps. These supports should be at least every four (4') feet. 5. All horizontal runs of pipe should have at least a 1/4" (in.) per foot of upward slope from the furnace to the vent terminal. 6. All runs of pipe should be as short as possible with as few turns as possible. 7. ...
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Allied Downflow or Horizontal 2 Stage Heat Variable Speed Gas Fired Non-Condensing Warm Air Furnace - page 15
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 appliance ...
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Allied Downflow or Horizontal 2 Stage Heat Variable Speed Gas Fired Non-Condensing Warm Air Furnace - page 16
Figure 11 AUTOMATIC HEAT STAGING JUMPER When installing optional accessories to this appliance, follow the manufacturer's installation instructions included with the accessory. 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 electrica ...
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Allied Downflow or Horizontal 2 Stage Heat Variable Speed Gas Fired Non-Condensing Warm Air Furnace - page 17
This furnace is manufactured for use with Natural gas and must be converted using the proper LP conversion kit for use with LP (Propane) gas. For LP (Propane) gas, a tank regulator is required to reduce supply pressure to 12"-13"w.c. For manifold pressure see Table 6. A main manual shut off valve must be used in the gas piping. The shut o ...
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Allied Downflow or Horizontal 2 Stage Heat Variable Speed Gas Fired Non-Condensing Warm Air Furnace - page 18
Cooling Mode : The units are factory set for the highest airflow for each model. Adjustments can be made to the cooling airflow by repositioning the jumper plug marked COOL - A, B, C, D (see AirFlow Adjustment Table on page 4) based on the information found in the table. By moving the ADJUST jumper plug (see Table on page 4) from the NORM position ...
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Allied Downflow or Horizontal 2 Stage Heat Variable Speed Gas Fired Non-Condensing Warm Air Furnace - page 19
STARTUP AND OPERATIONAL CHECKOUT It is not recommended that this furnace be used as a construction heater during any phase of construction. Very low return air temperatures, harmful vapors and operation of the unit with clogged or misplaced filters will damage the unit. The unit may only be used for heating of buildings or structures under construc ...
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Allied Downflow or Horizontal 2 Stage Heat Variable Speed Gas Fired Non-Condensing Warm Air Furnace - page 20
The gas control (Figure 13) has two separate pressure regulator adjustment screws, one for 1 st stage (marked "LO") and the second one for 2 nd stage (marked "HI"). The adjusting screws are positioned on either side of the barbed fitting. The pressure regulator adjustment is sensitive: one turn of the adjusting screw will result ...
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Allied Downflow or Horizontal 2 Stage Heat Variable Speed Gas Fired Non-Condensing Warm Air Furnace - page 21
Burner Orifice Sizing: The furnace is supplied with standard orifices for the gas shown on the rating plate. Table 6 shows combinations of heating values and specific gravities for various gases, from which proper input can be obtained. If changing orifices is required, remove the manifold from the furnace (following the instructions found on page ...
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Allied Downflow or Horizontal 2 Stage Heat Variable Speed Gas Fired Non-Condensing Warm Air Furnace - page 22
Limit Control Checkout: After the furnace has been in operation for at least 15 minutes, restrict the return air supply by blocking the filters or closing the return registers and allow the furnace to shut down on high limit. The main burners will shut OFF and the main blower and combustion blower should continue to run. Remove the restriction and ...
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Allied Downflow or Horizontal 2 Stage Heat Variable Speed Gas Fired Non-Condensing Warm Air Furnace - page 23
SEQUENCE OF OPERATION DIRECT IGNITION SYSTEM CONTROL 20571201 Issue 0527 Page 23 of 28 ...
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Allied Downflow or Horizontal 2 Stage Heat Variable Speed Gas Fired Non-Condensing Warm Air Furnace - page 24
SERVICING THE FURNACE ELECTRICAL SHOCK, FIRE OR EXPLOSION HAZARD Failure to follow safety warnings exactly could result in dangerous operation, serious injury, death or property damage. Improper servicing could result in dangerous operation, serious injury, death or property damage. • Before servicing, disconnect all electrical power to furnace. ...
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Allied Downflow or Horizontal 2 Stage Heat Variable Speed Gas Fired Non-Condensing Warm Air Furnace - page 25
4. Disconnect wires from rollout switch. 5. Remove manifold or burner/manifold assembly. Manifold ONLY a. Remove the No. 10 screws that secure the manifold pipe to both legs of the manifold assembly. The manifold pipe must be supported during this step, or it could fall and damage the furnace or cause bodily injury! b. Slide the manifold pipe (with ...
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Allied Downflow or Horizontal 2 Stage Heat Variable Speed Gas Fired Non-Condensing Warm Air Furnace - page 26
TROUBLE SHOOTING With LED Indicator Assistance Troubleshooting Make the following visual checks before toubleshooting: 1. Check to see that the power to the furnace and the integrated ignition/blower control board is ON. 2. The manual shutoff valves in the gas line to the furnace must be open 3. Make sure all wiring connections are secure. 4. Revie ...
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Allied Downflow or Horizontal 2 Stage Heat Variable Speed Gas Fired Non-Condensing Warm Air Furnace - page 27
WIRING DIAGRAM 20571201 Issue 0527 Page 27 of 28 ...
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Allied Downflow or Horizontal 2 Stage Heat Variable Speed Gas Fired Non-Condensing Warm Air Furnace - page 28
NOTES 20571201 Issue 0527 Page 28 of 28 ...
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