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A95UH, A93UH, 95G1UH & 92G1UH
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
A95/A93/95G1/92G1UH Parts Arrangement ................ 3
A95/A93/95G1/92G1UH 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 .......................................................................... 13
Duct System ................................................................ 13
Pipe and Fittings Specifications .................................. 13
Joint Cementing Procedure ........................................ 15
Venting Practices ........................................................ 16
*P506724-01*
(P) 506724-01
506724-01
INSTALLATION INSTRUCTIONS
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.
Vent Piping Guidelines ................................................ 17
Gas Piping .................................................................. 35
Electrical ..................................................................... 38
Unit Start Up ................................................................ 41
Gas Pressure Adjustment ........................................... 43
High Altitude Information ............................................. 43
Other Unit Adjustments ............................................... 46
Blower Motor Performance ......................................... 47
Service ........................................................................ 51
Planned Service .......................................................... 53
Diagnostic Codes ........................................................ 53
Repair Parts List ......................................................... 54
Start Up Checklist ....................................................... 55
A Lennox International, Inc. Company
Issue 1108
WARNING
Manufactured By
Allied Air Enterprises, Inc.
215 Metropolitan Drive
West Columbia, SC 29170
Page 1 of 57
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Summary of Contents for Allied WARM AIR GAS FURNACE 92G1UH
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Page 1: Table Of Contents
Planned Service ... 53 Diagnostic Codes ... 53 Repair Parts List ... 54 Start Up Checklist ... 55 Issue 1108 WARNING Manufactured By Allied Air Enterprises, Inc. A Lennox International, Inc. Company 215 Metropolitan Drive West Columbia, SC 29170 Page 1 of 57... -
Page 2: Front View
A95UH, A93UH, 95G1UH & 92G1UH Unit Dimensions - inches (mm) 1 NOTE - 20C and 20D (5 Ton) size units installed in upflow applications that require air volumes of 1800 cfm (850 L/s) or greater must have one of the following: 1. -
Page 3: Expanded View
EXPANDED VIEW Figure 1 506724-01 Issue 1108 Page 3 of 57... -
Page 4: A95/A93/95G1/92G1Uh Gas Furnace
A95UH, A93UH, 95G1UH &92G1UH Gas Furnace The A95UH/A93UH/95G1UH & 92G1UH Category IV gas furnace is shipped ready for installation in the upflow or horizontal position. The furnace is shipped with the bottom panel in place. The bottom panel must be removed if the unit is to be installed in horizontal or upflow applications with bottom return air. -
Page 5: Installation Locations
Installation Locations This furnace is CSA International certified for installation clearances to combustible material as listed on the unit nameplate and in the table in Figure 10. Accessibility and service clearances must take precedence over fire protection clearances. NOTE: For installation on combustible floors, the furnace shall not be installed directly on carpeting, tile, or other combustible material other than wood flooring. -
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 Combustion, Dilution & Ventilation Air If this unit is installed as a Non-Direct Vent Furnace, follow the guidelines in this section. -
Page 7: Unconfined Space
air is brought into the house for combustion, negative pressure (outside pressure is greater than inside pressure) will build to the point that a down draft can occur in the furnace vent pipe or chimney. As a result, combustion gases enter the living space creating a potentially dangerous situation. - Page 8 Air from Outside If air from outside is brought in for combustion and ventilation, the confined space shall be provided with two permanent openings. One opening shall be within 12” (305 mm) of the top of the enclosure and one within 12” (305 mm) of the bottom.
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Page 9: Setting Equipment
Shipping Bolt Removal Units with 1/2 hp blower motor are equipped with three flexible legs and one rigid leg. The rigid leg is equipped with a shipping bolt and a flat white plastic washer (rather than the rubber mounting grommet used with a flexible mounting leg). - Page 10 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 air in the living space. Use sheet metal screws and joint tape to seal return air system to furnace.
- Page 11 CONDENSATE TRAP AIR FLOW 17−1/2 (446) B Width (68W62) 21 (533) C Width (68W63) 24−1/2 (622) D Width (68W64) FRONT VIEW NOTE− Optional side return air filter kits are not for use with return air base. Both the unit return air opening and the base return air opening must be covered by a single plenum or IAQ cabinet. Minimum unit side return air opening dimensions for units requiring 1800 cfm of air and over (W x H): 23 x 11 in.
- Page 12 Horizontal Application Installation Clearances Right−Hand Discharge Flow Bottom (Floor)** Left−Hand Discharge Flow Bottom (Floor)** Front* Back Ends Vent Floor *Front clearance in alcove installation must be 24 in. (610 mm). Maintain a minimum of 24 in. (610 mm) for front service access. **An 8"...
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Page 13: Filters
INTAKE PIPE EXHAUST PIPE *Gas connector may be used Canadian installation if accept- able by local authority having jurisdiction. SERVICE PLATFORM FIGURE 17 Return Air -- Horizontal Applications Return air may be brought in only through the end of a furnace installed in the horizontal position. - Page 14 CAUTION Solvent cements for plastic pipe are flammable liquids and should be kept away from all sources of ignition. Do not use excessive amounts of solvent cement when making joints. Good ventilation should be maintained to reduce fire hazard and to minimize breathing of solvent vapors.
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Page 15: Joint Cementing Procedure
VENT A95UH PIPE DIA. A93UH (in.) 95G1UH 92G1UH 1−1/2" X 12" 2−1/2 2−1/2 2−1/2 2−1/2 *Requires field−provided and installed 1−1/2" exhaust accelerator. ** Kit 51W11 is provided with a 1−1/2" accelerator which must be used for all 45,000 and 70,000 furnace installations. ††... -
Page 16: Venting Practices
6. Promptly apply solvent cement to end of pipe and inside socket surface of fitting. Cement should be applied lightly but uniformly to inside of socket. Take care to keep excess cement out of socket. Apply second coat to end of pipe. 7. -
Page 17: Vent Piping Guidelines
Vent Piping Guidelines This gas furnace can be installed as either a Non-Direct Vent or a Direct Vent gas central furnace. NOTE: In non-Direct Vent installations, combustion air is taken from indoors and flue gases are discharged outdoors. In Direct Vent installations, combustion air is taken from outdoors and flue gases are discharged outdoors. - Page 18 A93UH and 92G1UH Maximum Allowable Intake or Exhaust Vent Length in Feet *Size intake and exhaust pipe length separately. Values in table are for Intake OR Exhaust, not combined total. Both Intake and Exhaust must be same pipe size. 2" Pipe Number Of Model 90°...
- Page 19 A95UH and 95G1UH Maximum Allowable Intake or Exhaust Vent Length in Feet *Size intake and exhaust pipe length separately. Values in table are for Intake OR Exhaust, not combined total. Both Intake and Exhaust must be same pipe size. 2" Pipe Number Of Model 90°...
- Page 20 TYPICAL EXHAUST PIPE CONNECTIONS IN UPFLOW DIRECT OR NON−DIRECT VENT APPLICATIONS Pipe size determined in table 5 2” 3” 2” 2” 2” 2” TRANSITION EXHAUST *2” DO NOT transition from smaller to larger pipe in horizontal runs of exhaust pipe. * When transitioning up in pipe size, use the shortest length of 2”...
- Page 21 TYPICAL AIR INTAKE PIPE CONNECTIONS IN UPFLOW DIRECT VENT APPLICATIONS 2” AIR INTAKE TYPICAL AIR INTAKE PIPE CONNECTIONS IN HORIZONTAL DIRECT VENT APPLICATIONS * When transitioning up in pipe size, use the shortest length of 2” PVC pipe possible. NOTE − Intake and exhaust pipe must be the same diameter. Intake Piping (Figures 24 through 27) This gas furnace may be installed in either direct vent or non-direct vent applications.
- Page 22 Use transition solvent cement or a sheet metal screw to secure the intake pipe to the inlet air connector. Route piping to outside of structure. Continue with installation following instructions given in general guide lines for piping terminations and in intake and exhaust piping terminations for direct vent sections.
- Page 23 Follow the next two steps when installing the unit in Non– Direct Vent applications where combustion air is taken from indoors and flue gases are discharged outdoors. Use field-provided materials and the factory-provided air intake screen to route the intake piping as shown in figure 26 or 27.
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Page 24: Vent Termination Clearances
FOR NON−DIRECT VENT INSTALLATIONS IN THE USA AND CANADA VENT TERMINAL Clearance above grade, veranda, porch, deck or balcony Clearance to window or door that may be opened Clearance to permanently closed window Vertical clearance to ventilated soffit located above the terminal within a horizontal distance of 2 feet (mm) from the center line of the terminal Clearance to unventilated soffit... - Page 25 FOR DIRECT VENT INSTALLATIONS IN THE USA AND CANADA VENT TERMINAL Clearance above grade, veranda, porch, deck or balcony Clearance to window or door that may be opened Clearance to permanently closed window Vertical clearance to ventilated soffit located above the terminal within a horizontal distance of 2 feet (mm) from the center line of the terminal Clearance to unventilated soffit...
- Page 26 Details of Intake and Exhaust Piping Terminations for Direct Vent Installations NOTE: In Direct Vent installations, combustion air is taken from outdoors and flue gases are discharged to outdoors. NOTE: Flue gas may be slightly acidic and may adversely affect some building materials. If any vent termination is used and the flue gases may impinge on the building material, a corrosion-resistant shield (minimum 24 inches square) must be used to protect the wall surface.
- Page 27 FIELD SUPPLIED WALL TERMINATION NOTE − FIELD PROVIDED REDUCER MAY BE REQUIRED TO ADAPT LARGER VENT PIPE SIZE TO TERMINATION 1/2" (13mm) ARMAFLEX INSULATION IN UNCONDITIONED SPACE (IF REQUIRED) * WALL SUPPORT See venting table for maximum venting lengths with this arrangement.
- Page 28 NOTE − See unit installation instructions for proper exhaust pipe termination size reduction. The exhaust termination tee should be connected to the 2" or 3" PVC flue pipe as shown in the illustration. Do not use an accelerator in applications that include an exhaust termination tee. The accelerator is not required. As required.
- Page 29 FIELD SUPPLIED WALL TERMINATION NOTE − FIELD PROVIDED REDUCER MAY BE REQUIRED TO ADAPT LARGER VENT PIPE SIZE TO TERMINATION 1/2" (13mm) ARMAFLEX INSULATION IN UNCONDITIONED SPACE (IF REQUIRED) * WALL SUPPORT See venting table for maximum venting lengths with this arrangement.
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Page 30: Front View
DIRECT VENT CONCENTRIC ROOFTOP TERMINATION 71M80, 69M29 or 60L46 (US) 44W92 or 44W93 (Canada) 1 1/2" (38mm) accelerator provided on 71M80 & 44W92 EXHAUST VENT 12” (305mm) INTAKE Minimum Above Average Snow Accumulation SHEET METAL STRAP (Clamp and sheet metal strap must be field installed to support the weight of the termination kit.) CLAMP... - Page 31 NON−DIRECT VENT ROOF TERMINATION KIT (15F75 or 44J41) 12" (305mm) ABOVE AVE. SNOW ACCUMULATION 1/2" (13mm) FOAM INSULATION IF REQUIRED 3" (76mm) OR 2" (51mm) PVC PROVIDE SUPPORT FOR EXHAUST LINES FIGURE 39 NON−DIRECT VENT FIELD SUPPLIED WALL TERMINATION 12" (305mm) MAX. for 2" (51mm) 20"...
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Page 32: Condensate Piping
Condensate Piping This unit is designed for either right or left side exit of condensate piping in upflow applications. In horizontal applications, the condensate trap must extend below the unit. An 8” service clearance is required for the condensate trap. Refer to Figure 43 for condensate trap locations. CONDENSATE TRAP AND PLUG LOCATIONS (Unit shown in upflow position) Trap... - Page 33 Condensate line must slope downward away from the trap to drain. If drain level is above condensate trap, condensate pump must be used. Condensate drain line should be routed within the conditioned space to avoid freezing of condensate and blockage of drain line. If this is not possible, a heat cable kit may be used on the condensate trap and line.
- Page 34 TRAP / DRAIN ASSEMBLY USING 1/2" PVC OR 3/4" PVC OPTIONAL Condensate Drain Connection Adapter 1/2 inch slip X 1/2 inch mpt (Not Furnished) 90° Street Elbow 1/2 inch PVC (Not Furnished) Condensate Drain Connection In Unit OPTIONAL Drain Piping Drain Assembly for 1/2 inch Drain Pipe 1/2 inch PVC (Not Furnished)
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Page 35: 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 36: Horizontal Application
Left Side Piping (Standard) MANUAL MAIN SHUT−OFF VALVE GROUND JOINT UNION Bellows Grommet DRIP LEG MANUAL MAIN SHUT−OFF VALVE GROUND JOINT UNION DRIP LEG Horizontal Application Right−Side Air Discharge Gas Valve Plug Page 36 of 57 Plug Plug Gas Valve FIELD PROVIDED AND INSTALLED... - Page 37 Nominal Internal Iron Pipe Size Diameter −Inches(mm) −Inches(mm) (3.048) .622 (12.7) (17.799) (4.96) .824 (19.05) (20.930) (10.19) 1.049 (25.4) (26.645) (19.25) 1−1/4 1.380 1400 (31.75) (35.052) (39.64) 1−1/2 1.610 2100 (38.1) (40.894) (59.46) 2.067 3950 (50.8) (52.502) (111.85) 2−1/2 2.469 6300 (63.5) (67.713)
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Page 38: Electrical
Electrical ELECTROSTATIC DISCHARGE (ESD) Precautions and Procedures CAUTION Electrostatic discharge can affect electronic components. Take precautions during furnace installation and service to protect the furnace’s electronic controls. Precautions will help to avoid control exposure to electrostatic discharge by putting the furnace, the control and the technician at the same electrostatic potential. - Page 39 FURNACE and CONDENSING UNIT THERMOSTAT DESIGNATIONS (Refer to specific thermostat and outdoor unit.) Thermostat Furnace POWER HEAT COOLING INDOOR BLOWER COMMON FIGURE 53 terminals. If a humidifier rated at greater than one amp is connected to this terminal, it is necessary to use an external relay.
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Page 40: Typical Wiring Diagram
TYPICAL WIRING DIAGRAM Figure 55 Page 40 of 57 Issue 1108 506724-01... -
Page 41: Unit Start Up
Unit Start-Up FOR YOUR SAFETY READ BEFORE OPERATING WARNING Do not use this furnace if any part has been underwater. A flood-damaged furnace is extremely dangerous. Attempts to use the furnace can result in fire or explosion. Immediately call a qualified service technician to inspect the furnace and to replace all gas controls, control system parts, and electrical parts that have been wet or to replace the furnace, if deemed necessary. - Page 42 Priming Condensate Trap The condensate trap should be primed with water prior to start-up to ensure proper condensate drainage. Either pour 10 fl. oz. (300 ml) of water into the trap, or follow these steps to prime the trap: 1. Follow the lighting instructions to place the unit into operation.
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Page 43: Gas Pressure Adjustment
Gas Pressure Adjustment Gas Flow (Approximate) GAS METER CLOCKING CHART Seconds for One Revolution Natural Unit 1 cu ft 2 cu ft Dial Dial −045 −070 −090 −110 −135 Natural−1000 btu/cu ft LP−2500 btu/cu ft TABLE 9 Furnace should operate at least 5 minutes before checking gas flow. - Page 44 Burner Orifice Conversion Kits at Varying Altitudes 0 - 7,500 ft (0 - 2,286 m) Natural LP/Propane Unit Size LP/Propane Natural 68W75*† 73W80* * Conversion requires installation of a gas valve regulator spring which is provided with the gas conversion kit. †...
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Page 45: Testing For Proper Venting And Sufficient Combustion Air For Non-Direct Vent Applications
Testing for Proper Venting and Sufficient Combustion Air for Non-Direct Vent Applications WARNING 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. -
Page 46: Other Unit Adjustments
Other Unit Adjustments Primary Limit The primary limit is located on the heating compartment vestibule panel. This limit is factory set and requires no adjustment. Flame Rollout Switches (Two) These manually reset switches are located on the front of the burner box. -
Page 47: Blower Motor Performance
A93UH1D / 92G1UH 045*08B PERFORMANCE (Less Filter) Air Volume / Watts at Various Blower Speeds External Medium- Static High High Pressure in. w.g. cfm Watts cfm Watts cfm Watts cfm Watts 0.00 1140 455 0.10 1135 445 0.20 1125 430 0.30 1090 415 0.40... - Page 48 A93UH1D / 92G1UH 110*20C PERFORMANCE (Less Filter) Bottom Return Air, Side Return Air with Optional Return External Air Base, Return Air from Both Sides or Return Air from Static Bottom and One Side. Pressure High Medium-High Medium-Low in. w.g. Watts Watts 0.00 2395...
- Page 49 A95UH1D / 95G1UH 045*08B PERFORMANCE (Less Filter) Air Volume / Watts at Various Blower Speeds External Medium- Static High High Pressure in. w.g. cfm Watts cfm Watts cfm Watts cfm Watts 0.00 1140 455 0.10 1135 445 0.20 1125 430 0.30 1090 415 0.40...
- Page 50 A95UH1D / 95G1UH 110*20C PERFORMANCE (Less Filter) Bottom Return Air, Side Return Air with Optional Return External Air Base, Return Air from Both Sides or Return Air from Static Bottom and One Side. Pressure High Medium-High Medium-Low in. w.g. cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts 0.00 2370 1330 2230 1100 2000 0.10...
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Page 51: 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. - Page 52 21. Remove two screws from the front cabinet flange at the blower deck. Spread cabinet sides slightly to allow clearance for removal of heat exchanger. 22. Remove screws along vestibule sides and bottom which secure vestibule panel and heat exchanger assembly to cabinet.
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Page 53: Planned Service
PLANNED SERVICE DIAGNOSTIC CODES A service technician should check the following items during an annual inspection. Power to the unit must be shut off for 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 54: Repair Parts List
REPAIR PARTS LIST The following repair parts are available through Allied Air dealers. When ordering parts, include the complete furnace model number listed on the CSA nameplate. All service must be performed by a licensed professional installer (or equivalent), service agency, or gas supplier. Cabinet Parts Upper Access Panel Blower Access Panel... -
Page 55: Start Up Checklist
Start−Up & Performance Check List GAS SUPPLY Natural Gas Piping Connections Tight Leak Tested INTAKE / EXHAUST PIPE All Joints Primed and Glued Terminations Installed Properly Horizontal Pipes Sloped (if applicable) Condensate Trap Primed / Line Sloped Pipes Supported Heat Cable Installed and Operable (if applicable) 506724-01 UNIT SET UP Furnace:... - Page 56 HEATING MODE COMBUSTION SAMPLE CO INDOOR BLOWER AMPS______ TEMPERATURE RISE Supply Duct Temperature ________ Return Duct Temperature Temperature Rise = ________ TOTAL EXTERNAL STATIC Supply External Static _______ Return External Static + ______ Total External Static = _______ CONDENSATE LINE Leak Free VENT PIPE Leak Free...
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Page 57: Requirements For Commonwealth Of Massachusetts
REQUIREMENTS for COMMONWEALTH of MASSACHUSETTS Modifications to NFPA-54, Chapter 10 Revise NFPA-54 section 10.8.3 to add the following requirements: For all side wall, horizontally vented, gas-fueled equipment installed in every dwelling, building or structure used in whole or in part for residential purposes, including those owned or operated by the Commonwealth and where the side wall exhaust vent termination is less than seven (7) feet above the finished grade in the area of the venting, including but...
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