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TABLE OF CONTENTS
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Furnace Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Furnace Wiring Specifications . . . . . . . . . . . . . . . . . . . . . . . . . .
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Location/Placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air for Combustion & Ventilation . . . . . . . . . . . . . . . . . . . . . . . .
Ducting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Venting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Do not store or use gasoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.
Installation and service must be performed
by a qualified installer, service agency or
the gas supplier.
unqualified person may lead to equipment
damage and/or a hazardous condition
which may cause bodily injury and harm
and, as such, at the sole discretion of the
manufacturer, the entire warranty may be
voided and be of no further force and
effect.
20571201
AFFIX LABEL HERE
INSTALLATION AND SERVICING INSTRUCTIONS
UPFLOW, DOWNFLOW OR HORIZONTAL
TWO STAGE HEAT VARIABLE SPEED
GAS-FIRED NON-CONDENSING
WARM AIR FURNACE
RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE
Installation by an
2
Gas Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3
Control Board & Variable Speed Motor Features . . . . . . . . . . . . . 17
5
Unit Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
6
Start-Up Operation & Checkout . . . . . . . . . . . . . . . . . . . . . . . . . 19
7
Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
8
Servicing The Furnace . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Control System Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
WHAT TO DO IF YOU SMELL GAS:
• Do not try to light any appliance.
• Extinguish any open flame.
• Do not touch any electrical switch; do
not use any phone in your building.
• Immediately call your gas supplier from
a neighbor's phone.
supplier's instructions.
• If you cannot reach your gas supplier,
call the fire department.
Issue 0527
Follow the gas
Page 1 of 28
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Table of Contents
Related Manuals for Allied Downflow or Horizontal 2 Stage Heat Variable Speed Gas Fired Non-Condensing Warm Air Furnace
Summary of Contents for Allied Downflow or Horizontal 2 Stage Heat Variable Speed Gas Fired Non-Condensing Warm Air Furnace
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Page 1: Table Of Contents
INSTALLATION AND SERVICING INSTRUCTIONS TABLE OF CONTENTS Safety ......... . . Furnace Specifications . -
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. -
Page 3: Furnace Specifications
UNIT DIMENSIONS LENGTH WIDTH HEIGHT MODEL AV050B3 29 1/2 13 1/2 38 1/4 AV075B3 29 1/2 13 1/2 38 1/4 AV100B4 29 1/2 38 1/4 AV125B5 29 1/2 20 1/2 38 1/4 REDUCER SUPPLIED WITH FURNACE WHEN CONNECTION SIZE IS DIFFERENT THAN PIPE DIA. REQUIRED (H) FOR FLUE VENT PIPE. - Page 4 BLOWER MOTOR SPECIFICATIONS AND AIRFLOW ADJUSTING DATA MOTOR BLOWER MODEL WHEEL SETTING "A" AV050B3 10 X 6 AV075B3 10 X 6 AV100B4 12 X 9 1250 AV125B5 12 X 12 1650 THE UNIT, AS SHIPPED, IS FACTORY SET AT SETTING "A" TO RUN AT THE MIDDLE OF THE HEATING RISE RANGE SHOWN ON THE UNIT RATING LABEL.
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Page 5: Furnace Wiring Specifications
FURNACE WIRING SPECIFICATIONS 20571201 Issue 0527 Page 5 of 28... -
Page 6: Introduction
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;... -
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. Clearances: The following minimum clearances, or greater, must be provided between the furnace and adjacent construction. -
Page 8: Air For Combustion & Ventilation
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. - 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 all appliances must be included when determining...
- 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.
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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 attached to the flanged opening provided at the discharge end of the... -
Page 12: Venting
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. - 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.
- 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.
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Page 15: Electrical Connections
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. -
Page 16: Gas Connections
Figure 11 AUTOMATIC HEAT STAGING JUMPER When installing optional accessories to this appliance, follow the manufacturer's installation instructions included with the accessory. Gas piping shall be of such size and so installed as to provide a supply of gas sufficient to meet maximum demands without undue loss of pressure between the gas meter and the furnace. -
Page 17: Control Board & Variable Speed Motor Features
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. -
Page 18: Unit Sequence Of Operation
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. -
Page 19: Typical Flame Appearance
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 construction, if the conditions listed on page 6 in the "Introduction"... - Page 20 The gas control (Figure 13) has two separate pressure regulator adjustment screws, one for 1 (marked "LO") and the second one for 2 "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 in a relatively large change in manifold pressure.
- Page 21 Burner Orifice Sizing: The furnace is supplied with standard orifices for the gas shown on the rating plate. 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 24) and replace orifices as required by Table 6, the altitude derating section of this instruction or as local code...
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Page 22: Flame Rollout Switch
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. -
Page 23: Sequence Of Operation
SEQUENCE OF OPERATION DIRECT IGNITION SYSTEM CONTROL 20571201 Issue 0527 Page 23 of 28... -
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. - 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.
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Page 26: Troubleshooting
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. -
Page 27: Wiring Diagram
WIRING DIAGRAM 20571201 Issue 0527 Page 27 of 28... - Page 28 NOTES 20571201 Issue 0527 Page 28 of 28...
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