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Upflow / Horizontal Left and Right Air Discharge
This is a safety alert symbol and should never be ignored. When you see this symbol on labels or in
manuals, be alert to the potential for personal injury or death.
As with any mechanical equipment, personal injury can
result from contact with sharp sheet metal edges. Be
careful when you handle this equipment.
Unit Dimensions ............................................................ 2
A80UH & 80G1UH Parts Arrangement ......................... 3
A80UH & 80G1UH Gas Furnace .................................. 4
Shipping and Packing List ............................................ 4
Safety Information ......................................................... 4
Use of Furnace as a Construction Heater .................... 5
General ......................................................................... 6
Combustion, Dilution, Ventilation Air ............................. 6
Setting Equipment ........................................................ 9
Filters .......................................................................... 12
Duct System ................................................................ 12
Venting ........................................................................ 13
*506526-01*
506526-01
INSTALLATION INSTRUCTIONS
A80UH & 80G1UH
Warm Air Gas Furnace
This manual must be left with the homeowner for future reference.
CAUTION
TABLE OF CONTENTS
Improper installation, adjustment, alteration, service or
maintenance can cause property damage, personal injury
or loss of life. Installation and service must be performed
by a licensed professional installer (or equivalent), service
agency or the gas supplier.
Gas Piping .................................................................. 23
Electrical ..................................................................... 25
Unit Start-Up ............................................................... 29
Heating Sequence of Operation ................................. 30
Gas Pressure Adjustment ........................................... 31
High Altitude ................................................................ 31
Other Unit Adjustments ............................................... 31
Service ........................................................................ 33
Planned Service .......................................................... 36
Integrated Control Diagnostic Codes .......................... 36
Repair Parts List ......................................................... 37
A Lennox International, Inc. Company
Issue 1031
WARNING
Manufactured By
Allied Air Enterprises, Inc.
215 Metropolitan Drive
West Columbia, SC 29170
Page 1 of 39
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Summary of Contents for Allied Air 80G1UH
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Page 1: Table Of Contents
Be careful when you handle this equipment. Unit Dimensions ... 2 A80UH & 80G1UH Parts Arrangement ... 3 A80UH & 80G1UH Gas Furnace ... 4 Shipping and Packing List ... 4 Safety Information ... 4 Use of Furnace as a Construction Heater ... -
Page 2: Unit Dimensions
FRONT VIEW Model A801UH/80G1UH 045-08 045-12 070-08 070-12 090-12 090-16 110-12 110-16 110-20 135-20 Page 2 of 39 A80UH & 80G1UH Unit Dimensions - inches (mm) 13-3/8 14-1/2 17-1/2 16-3/8 19-7/8 24-1/2 23-3/8 Issue 1031 SIDE VIEW 4-3/4 6-1/4 19-1/2 9-3/4... -
Page 3: A80Uh & 80G1Uh Parts Arrangement
A80UH & 80G1UH Expanded View Figure 1 506526-01 Issue 1031 Page 3 of 39... -
Page 4: A80Uh & 80G1Uh Gas Furnace
A80UH & 80G1UH Gas Furnace The A80UH & 80G1UH gas furnace is shipped ready for installation in the upflow or horizontal right position (for horizontal left position the combustion air pressure switch must be moved). The furnace is shipped with the bottom panel in place. -
Page 5: Use Of Furnace As A Construction Heater
Temperature Rise NOTE: Furnace must be adjusted to obtain a temperature rise within the range specified on the unit nameplate. Failure to do so may cause erratic limit operation and may result in premature heat exchanger failure. This furnace must be installed so that its electrical components are protected from water. -
Page 6: General
To reduce exposure to this substance or for further information, consult material safety data sheets available from address shown below, or contact your supervisor. Allied Air Enterprises, Inc. 215 Metropolitan Drive West Columbia, SC 29170 Page 6 of 39 Combustion, Dilution &... - Page 7 All gas fired appliances require air for the combustion process. If sufficient combustion air is not available, the furnace or other appliances will operate inefficiently and unsafely. Enough air must be provided to meet the needs of all fuel burning appliances and appliances such as exhaust fans which force air out of the house.
- Page 8 When ducts are used, they shall be of the same cross sectional area as the free area of the openings to which they connect. The minimum dimension of rectangular air ducts shall be no less than 3 inches (75 mm). In calculating free area, the blocking effect of louvers, grilles, or screens must be considered.
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Page 9: Setting Equipment
Setting Equipment WARNING Do not install the furnace on its front or its back. Do not connect the return air ducts to the back of the furnace. Doing so will adversely affect the operation of the safety control devices, which could result in personal injury or death. - Page 10 Return Air - Upflow Applications Return air can be brought in through the bottom or either side of the furnace installed in an upflow application. If the furnace is installed on a platform with bottom return, make an airtight seal between the bottom of the furnace and the platform to ensure that the furnace operates properly and safely.
- Page 11 Removing the Bottom Panel Remove the two screws that secure the bottom cap to the furnace. Pivot the bottom cap down to release the bottom panel. Once the bottom panel has been removed, reinstall the bottom cap. See Figure 11. Removing the Bottom Panel Figure 11 Horizontal Application...
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Page 12: Filters
Horizontal Application Unit installed on Platform Figure 14 WARNING Improper installation of the furnace can result in personal injury or death. Combustion and flue products must never be allowed to enter the return air system or the living space. Use screws and joint tape to seal the return air system to the furnace. -
Page 13: Venting
Venting A 4 inch diameter flue transition is factory installed on the combustion air inducer outlet of all models. Figure 16 shows the combustion air inducer as shipped from the factory. Mounting Screws Location Figure 15 UPFLOW POSITION Top Vent Discharge Figure 16 IMPORTANT The unit will not vent properly with the flue transition... - Page 14 HORIZONTAL LEFT POSITION Top Vent discharge • Disconnect pressure switch hose from barbed fitting on the pressure switch assembly. Remove pressure switch assembly (1 screw) and cut wire tie to free pressure switch wires. Reinstall pressure switch on the other side of orifice plate and reconnect pressure switch hose. •...
- Page 15 These series units are classified as fan assisted Category I furnaces when vertically vented according to the latest edition of National Fuel Gas Code (NFPA 54 / ANSI Z223.1) in the USA. A fan assisted Category I furnace is an appliance equipped with an integral mechanical means to either draw or force combustion products through the combustion chamber and/or heat exchanger.
- Page 16 Common Venting Using Tile Lined Interior Masonry Chimney and Combined Vent Connector NOTE: Refer to provided venting tables for installations. DO NOT insulate the space between the liner and the chimney wall with puffed mica or any other loose granular insulating material.
- Page 17 6. The entire length of single wall metal vent connector shall be readily accessible for inspection, cleaning, and replacement. 7. Single appliance venting configurations with zero lateral lengths (Tables 3 and 4) are assumed to have no elbows in the vent system. For all other vent configurations, the vent system is assumed to have two 90°...
- Page 18 Capacity of Type B Double Wall Vents with Type B Double Wall Connectors Serving a Single Category I Appliance NOTE: Single appliance venting configureations with zero lateral lengths are assumed to have no elbows in the vent system. For all other vent configurations, the vent system is assumed to have two 90 °...
- Page 19 Capacity of Type B Double Wall Vents with Single Wall Metal Connectors Serving a Single Category I Appliance NOTE: Single appliance venting configureations with zero lateral lengths are assumed to have no elbows in the vent system. For all other vent configurations, the vent system is assumed to have two 90 °...
- Page 20 Type B Double Wall Vents with Type B Double Wall Connectors Type B Double Wall Vents with Type B Double Wall Connectors Page 20 of 39 Vent Connector Capacity Serving Two or More Category I Appliances Table 5 Common Vent Capacity Serving Two or More Category I Appliances Table 6 Issue 1031...
- Page 21 Type B Double Wall Vents with Single Wall Metal Connectors NOTE: Single appliance venting configureations with zero lateral lengths are assumed to have no elbows in the vent system. For all other vent configurations, the vent system is assumed to have two 90 ° elbows. For each additional 90° elbow or equivalent (for example two 45° elbows equal one 90°...
- Page 22 Removal of the Furnace from Common Vent In the event that an existing furnace is removed from a venting system commonly run with separate gas appliances, the venting system is likely to be too large to properly vent the remaining attached appliances. Conduct the following test while each appliance is operating and the other appliances (which are not operating) remain connected to the common venting system.
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Page 23: Gas Piping
Gas Piping CAUTION If a flexible gas connector is required or allowed by the authority that has jurisdiction, black iron pipe shall be installed at the gas valve and extend outside the furnace cabinet. The flexible connector can then be added between the black iron pipe and the gas supply line. - Page 24 NOTE: BLACK IRON PIPE ONLY TO BE ROUTED INSIDE OF CABINET Figure 26 Horizontal Applications Possible Gas Piping Configurations NOTE: BLACK IRON PIPE ONLY TO BE ROUTED INSIDE OF CABINET Figure 27 Page 24 of 39 Issue 1031 506526-01...
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Page 25: Electrical
Leak Check After gas piping is completed, carefully check all piping connections (factory and field installed) for gas leaks. Use a leak detecting solution or other preferred means. NOTE: If emergency shutoff is necessary, shut off the main manual gas valve and disconnect the main power to the furnace. - Page 26 Before connecting the thermostat, check to make sure the wires will be long enough for servicing at a later date. Make sure that thermostat wire is long enough to facilitate future removal of blower for service. Complete the wiring connections to the equipment. Use the provided unit wiring diagram and the field wiring diagram shown in Figure 33.
- Page 27 Wiring Diagram Figure 32 506526-01 Issue 1031 Page 27 of 39...
- Page 28 Typical Field Wiring Diagram Figure 33 Integrated Control (Automatic Hot Surface Ignition System) Figure 34 Page 28 of 39 Issue 1031 506526-01...
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Page 29: Unit Start-Up
Unit Start-UP FOR YOUR SAFETY READ BEFORE LIGHTING UNIT. WARNING Do not use this furnace if any part have been underwater. Immediately call a licensed professional service technician (or equivalent) to inspect the furnace and to replace any part of the control system and any gas control which has been underwater. -
Page 30: Heating Sequence Of Operation
Heating Sequence Of Operation (Figure 36) 1. When thermostat calls for heat, combustion air blower starts. 2. Combustion air pressure switch proves blower operation. Switch is factory set and requires no adjustment. After a 15 second prepurge, the hot surface ignitor energizes. -
Page 31: Gas Pressure Adjustment
High Altitude The manifold pressure may require adjustment to ensure proper combustion at higher altitudes. Refer to Table 12 for manifold pressure and pressure switch change. NOTE: A natural to L.P. propane gas changeover kit is necessary to convert this unit. Refer to the changeover kit installation instruction for the conversion procedure. NOTE: For Altitudes of 7501' - 10,000' call Lennox Technical Support Product Applications. - Page 32 Thermostat Heat Anticipation Set the heat anticipator setting (if adjustable) according to the amp draw listed on the wiring diagram that is attached to the unit. NOTE: Do not secure the electrical conduit directly to the air ducts or structure. Electrical 1.
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Page 33: Service
Service WARNING 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. When servicing controls, label all wires prior to disconnecting. - Page 34 Cleaning the Heat Exchanger and Burners NOTE: Use papers or protective covering in front of the furnace during cleaning. 1. Turn off both electrical and gas power supplies to furnace. 2. Remove flue pipe and top cap (some applications top cap can remain) from the unit.
- Page 35 9. Remove screws from both sides, top and bottom of vestibule panel. 10. Remove heat exchanger. It may be necessary to spread cabinet side to allow more room. If so, remove five screws from the left side or right side of cabinet. See Figure 40.
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Page 36: Planned Service
PLANNED SERVICE FAILURE CODES The following items should be checked during an annual inspection. Power to the unit must be shut off for the service technician’s safety. Fresh air grilles and louvers (on the unit and in the room where the furnace is installed) - Must be open and unobstructed to provide combustion air. -
Page 37: Repair Parts List
REPAIR PARTS LIST The following repair parts are available through independent Allied Air dealers. When ordering parts, include the complete furnace model number listed on the CSA International nameplate — Example: A801UH045JP24A-01. All service must be performed by a licensed professional installer (or equivalent), service agency, or gas supplier. Cabinet Parts Upper access panel Blower panel... - Page 38 START-UP & PERFORMANCE CHECK LIST UNIT SET UP Page 38 of 39 Issue 1031 506526-01...
- Page 39 UNIT OPERATION 506526-01 Issue 1031 Page 39 of 39...