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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
*506501-01*
506501-01
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 .................................................................. 31
Electrical ..................................................................... 34
Unit Start Up ................................................................ 37
Gas Pressure Measurement ....................................... 39
High Altitude Information ............................................. 39
Other Unit Adjustments ............................................... 41
Service ........................................................................ 42
Planned Service .......................................................... 44
Failure Codes .............................................................. 44
Repair Parts List ......................................................... 45
Start Up Checklist ....................................................... 46
A Lennox International, Inc. Company
Issue 1031
WARNING
Manufactured By
Allied Air Enterprises, Inc.
215 Metropolitan Drive
West Columbia, SC 29170
Page 1 of 48
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Summary of Contents for Armstrong A95UH
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Page 1: Table Of Contents
INSTALLATION INSTRUCTIONS A95UH, A93UH, 95G1UH & 92G1UH Warm Air Gas Furnace Upflow/Horizontal Left and Right Air Discharge This manual must be left with the homeowner for future reference. 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. -
Page 2: Unit Dimensions
A95UH, A93UH, 95G1UH & 92G1UH Unit Dimensions - inches (mm) 1 NOTE - 20 C/D (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: A95/A93/95G1/92G1Uh Parts Arrangement
EXPANDED VIEW Figure 1 506501-01 Issue 1031 Page 3 of 48... -
Page 4: A95/A93/95G1/92G1Uh Gas Furnace
A95UH, A93UH, 95G1UH &92G1UH Gas Furnace Safety Information The A95UH/A93UH/95G1UH & 92G1UH Category IV gas furnace is shipped ready for installation in the upflow or WARNING horizontal position. The furnace is shipped with the bottom panel in place. The bottom panel must be removed if the... -
Page 5: Use Of Furnace As A Construction Heater
Installed Locations Heating Unit Installed Parallel to Air Handler Unit 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. -
Page 6: General
• Air filters must be installed in the system and must be maintained during construction. WARNING Air filters must be replaced upon construction completion. Product Contains Fiberglass Wool. • • The input rate and temperature rise must be set per the Disturbing the insulation in this product during furnace rating plate. - Page 7 air is brought into the house for combustion, negative infiltration. If the furnace is located in a building of tight pressure (outside pressure is greater than inside pressure) construction with weather stripping and caulking around the will build to the point that a down draft can occur in the furnace windows and doors, follow the procedures in the “Air from vent pipe or chimney.
- Page 8 to 25 percent free area and metal louvers and grilles will Air from Outside have 60 to 75 percent free area. Louvers and grilles must If air from outside is brought in for combustion and ventilation, be fixed in the open position or interlocked with the equipment the confined space shall be provided with two permanent so that they are opened automatically during equipment openings.
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Page 9: Setting Equipment
Shipping Bolt Removal INSTALLATION Units with 1/2 hp blower motor are equipped with three Setting Equipment flexible legs and one rigid leg. The rigid leg is equipped with WARNING a shipping bolt and a flat white plastic washer (rather than the rubber mounting grommet used with a flexible mounting Do not connect the return air ducts to the back of the leg). - Page 10 Return Air Guidlines WARNING Return air can be brought in through the bottom or either side of the furnace installed in an upflow application. If the Improper installation of the furnace can result in personal furnace is installed on a platform with bottom return, make injury or death.
- Page 11 Optional Return Air Base (Upflow Applications Only) FRONT VIEW SIDE VIEW NOTE: Optional side return air filter kits are not for use with return air base. 1 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 or more of air (W x H): 23 x 11 in.
- Page 12 Typical Horizontal Application Horizontal Application Installation Clearances Right-Hand Discharge Figure 16 NOTE: When the furnace is installed on a platform or with * Front the horizontal suspension kit in a crawl space, it must be elevated enough to avoid water damage, accommodate drain Back trap and to allow the evaporator coil to drain.
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Page 13: Filters
Duct System Use industry approved standards to size and install the supply and return air duct system. This will result in a quiet and low-static system that has uniform air distribution. NOTE: This furnace is not certified for operation in heating mode (indoor blower operating at selected heating speed) with an external static pressure which exceeds 0.5 inches w.c. - Page 14 CAUTION IMPORTANT Solvent cements for plastic pipe are flammable liquids A95UH1D/A93UH1D/95G1UH & 92G1UH exhaust and and should be kept away from all sources of ignition. Do intake connections are made of PVC. Use PVC primer not use excessive amounts of solvent cement when and solvent cement when using PVC vent pipe.
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Page 15: Joint Cementing Procedure
OUTDOOR TERMINATION KITS USAGE Table 3 Joint Cementing Procedure 1. Measure and cut vent pipe to desired length. All cementing of joints should be done according to the 2. Debur and chamfer end of pipe, removing any ridges or specifications outlined in ASTM D 2855. rough edges. -
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 Use the following steps to correctly size vent pipe diameter. 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 Maximum Allowable Vent Length Table 5 Page 18 of 48 Issue 1031 506501-01...
- Page 19 TYPICAL EXHAUST PIPE CONNECTIONS AND CONDENSATE TRAP INSTALLATION IN UPFLOW DIRECT OR NON-DIRECT VENT APPLICATIONS Figure 22 TYPICAL EXHAUST PIPE CONNECTIONS AND CONDENSATE TRAP INSTALLATION IN HORIZONTAL DIRECT OR NON-DIRECT VENT APPLICATIONS (RIGHT HAND DISCHARGE SHOWN) Figure 23 506501-01 Issue 1031 Page 19 of 48...
- Page 20 TYPICAL AIR INTAKE PIPE CONNECTIONS IN UPFLOW DIRECT VENT APPLICATIONS Figure 24 TYPICAL INTAKE PIPE CONNECTIONS IN HORIZONTAL DIRECT VENT APPLICATIONS (Right Hand Discharge Shown) Figure 25 Intake Piping (Figures 24 through 27) Follow the next two steps when installing the unit in Direct Vent applications, where combustion air is taken from This gas furnace may be installed in either direct vent or outdoors and flue gases are discharged outdoors.
- Page 21 Use transition solvent cement or a sheet metal screw TYPICAL AIR INTAKE PIPE CONNECTIONS to secure the intake pipe to the inlet air connector. HORIZONTAL NON-DIRECT VENT APPLICATIONS Route piping to outside of structure. Continue with (Horizontal Right-Hand Air Discharge Application Shown) installation following instructions given in general guide lines for piping terminations and in intake and exhaust piping terminations for direct vent sections.
- Page 22 Follow the next two steps when installing the unit in Non– coatings). It is recommended that the exhaust outlet not Direct Vent applications where combustion air is taken be located within 6 feet (1.8 m) of a condensing unit because from indoors and flue gases are discharged outdoors.
- Page 23 VENT TERMINATION CLEARANCES FOR NON-DIRECT VENT INSTALLATiONS IN THE USA AND CANADA Figure 28 506501-01 Issue 1031 Page 23 of 48...
- Page 24 VENT TERMINATION CLEARANCES FOR DIRECT VENT INSTALLATiONS IN THE USA AND CANADA Figure 29 Page 24 of 48 Issue 1031 506501-01...
- Page 25 Details of Intake and Exhaust Piping Terminations for FIELD SUPPLIED WALL TERMINATION Direct Vent Installations NOTE: In Direct Vent installations, combustion air is taken from outdoors and flue gases are discharged to outdoors. Intake and exhaust pipes may be routed either horizontally through and outside wall or vertically through the roof.
- Page 26 5. On field supplied terminations for sidewall exit, exhaust piping may extend a maximum of 12 inches (305 mm) FIELD SUPPLIED WALL TERMINATION for 2” PVC and 20 inches (508 mm) for 3” (76 mm) PVC beyond the outside wall. Intake piping should be as short as possible.
- Page 27 DIRECT VENT APPLICATION DIRECT VENT CONCENTRIC WALL TERMINATION 71M80, 69M29 OR 60L46 (US) USING EXISTING CHIMNEY 41W92 or 41W93 (Canada) Figure 34 NOTE: Do not discharge exhaust gases directly into any chimney or vent stack. If vertical discharge through an existing unused chimney or stack is required, insert piping inside chimney until the pipe open end is above top of chimney and terminates as illustrated.
- Page 28 NON-DIRECT VENT FIELD SUPPLIED WALL NON-DIRECT VENT ROOF TERMINATION KIT TERMINATION EXTENDED OR (15F74) (15F75 or 44J41) WALL TERMINATION VENT PIPE EXTENDED Figure 37 NON-DIRECT VENT FIELD SUPPLIED WALL * Use wall support every 24” (610 mm). Use two supports if extension TERMINATION is greater than 24”...
- Page 29 CONDENSATE TRAP AND PLUG LOCATIONS (Unit shown in upflow position) NOTE: In upflow applications where side return air filter is installed on same side as the condensate trap, filter rack MUST be installed beyond condensate trap or trap must be relocated to avoid interference.
- Page 30 Condensate line must slope downward away from the trap CONDENSATE ASSEMBLY 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.
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Page 31: Gas Piping
6. In some localities, codes may require installation of a Gas Piping manual main shut-off valve and union (furnished by installer) external to the unit. Union must be of the CAUTION ground joint type. If a flexible gas connector is required or allowed by the IMPORTANT authority that has jurisdiction, black iron pipe shall be installed at the gas valve and extend outside the furnace... - Page 32 NOTE: BLACK IRON PIPE ONLY TO BE ROUTED INSIDE OF CABINET Figure 47 Horizontal Applications Possible Gas Piping Configurations Figure 48 Page 32 of 48 Issue 1031 506501-01...
- Page 33 GAS PIPE CAPACITY - FT³/HR (kL/HR) NOTE: Capacity given in cubic feet of gas per hour (kilo liters of gas per hour) and based on 0.60 specific gravity gas. Table 7 Removal of the Furnace from Common Vent 3. Close all building doors and windows and all doors In the event that an existing furnace is removed from a between the space in which the appliances remaining venting system commonly run with separate gas appliances,...
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Page 34: Electrical
Electrical The unit is equipped with a field makeup box. The makeup ELECTROSTATIC DISCHARGE (ESD) box may be moved to the right side of the furnace to facilitate Precautions and Procedures installation. Seal unused openings on left side with plugs removed from right side. - Page 35 Indoor Blower Speeds FURNACE & CONDENSING UNIT 1. When the thermostat is set to “FAN ON”, the indoor THERMOSTAT DESIGNATIONS blower will run continuously on the heating speed when (Refer to specific thermostat and outdoor unit.) there is no cooling or heating demand. 2.
- Page 36 TYPICAL WIRING DIAGRAM Figure 53 Page 36 of 48 Issue 1031 506501-01...
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Page 37: Unit Start Up
INTEGRATED CONTROL (Automatic Hot Surface Ignition System) Figure 54 Unit Start-Up FOR YOUR SAFETY READ BEFORE OPERATING CAUTION WARNING Before attempting to perform any service or maintenance, turn the electrical power to unit OFF at disconnect switch. Do not use this furnace if any part has been underwater. A flood-damaged furnace is extremely dangerous. - Page 38 Priming Condensate Trap 9. Replace the upper access panel. The condensate trap should be primed with water prior to 10. Turn on all electrical power to the unit. start-up to ensure proper condensate drainage. Either pour 11. Set the thermostat to desired setting. 10 fl.
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Page 39: Gas Pressure Measurement
Gas Pressure Adjustment 2. Start unit and allow 5 minutes for unit to reach steady Gas Flow (Approximate) state. 3. While waiting for the unit to stabilize, observe the flame. Flame should be stable and should not lift from burner. Natural gas should burn blue. - Page 40 Testing for Proper Venting and Sufficient Combustion Air for Non-Direct Vent Applications 6. Follow the lighting instruction to place the appliance being inspected into operation. Adjust thermostat so WARNING appliance will operate continuously. 7. Use the flame of match or candle to test for spillage of CARBON MONOXIDE POISONING HAZARD flue gases at the draft hood relief opening after 5 Failure to follow the steps outlined below for each...
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Page 41: Other Unit Adjustments
Other Unit Adjustments Thermostat Heat Anticipation Set the heat anticipator setting (if adjustable) according to Primary Limit the amp draw listed on the wiring diagram that is attached The primary limit is located on the heating compartment to the unit. vestibule panel. -
Page 42: Service
Service Winterizing and Condensate Trap Care 1. Turn off power to the furnace. WARNING 2. Have a shallow pan ready to empty condensate water. 3. Remove the clean out cap from the condensate trap ELECTRICAL SHOCK, FIRE, and empty water. Inspect the trap then reinstall the clean OR EXPLOSION HAZARD. - Page 43 21. Remove two screws from the front cabinet flange at the 43. Reconnect wires to gas valve. blower deck. Spread cabinet sides slightly to allow 44. Replace the blower compartment access panel. clearance for removal of heat exchanger. 45. Refer to instruction on verifying gas and electrical 22.
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Page 44: Planned Service
PLANNED SERVICE FAILURE 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 45: 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 Heating Parts Upper Access Panel... -
Page 46: Start Up Checklist
Start-Up & Performance Check List UNIT SET UP Page 46 of 48 Issue 1031 506501-01... - Page 47 UNIT OPERATION Heating Mode Cooling Mode 506501-01 Issue 1031 Page 47 of 48...
- Page 48 REQUIREMENTS for COMMONWEALTH of MASSACHUSETTS Modifications to NFPA-54, Chapter 10 INSPECTION. The state or local gas inspector of the Revise NFPA-54 section 10.8.3 to add the following side wall, horizontally vented, gas-fueled equipment requirements: shall not approve the installation unless, upon inspection, the inspector observes carbon monoxide For all side wall, horizontally vented, gas-fueled equipment detectors and signage installed in accordance with the...