Lennox Allied Air A95UH1D Installation Instructions Manual
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Lennox Allied Air A95UH1D Installation Instructions Manual

Warm air gas furnace
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A95UH1D, A93UH1D, 95G1UH-P & 92G1UH-P
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.
Unit Dimensions ..........................................................2
Parts Arrangement.......................................................3
Gas Furnace ................................................................4
Shipping and Packing List ...........................................4
Safety Information .......................................................4
General ........................................................................6
Combustion, Dilution & Ventilation Air .........................7
Installation .................................................................10
Filters .........................................................................13
Duct System ..............................................................13
Venting Practices .......................................................16
Condensate Piping ....................................................36
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.
Manufactured By
Allied Air Enterprises LLC
A Lennox International, Inc. Company
215 Metropolitan Drive
West Columbia, SC 29170
507270-03
INSTALLATION INSTRUCTIONS
Warm Air Gas Furnace
This manual must be left with the homeowner for future reference.

Table of Contents

WARNING
Save these instructions for future reference
Gas Piping .................................................................39
Electrical ....................................................................42
Unit Start-Up ..............................................................45
Air for Non-Direct Vent Applications ..........................49
Other Unit Adjustments..............................................50
Service.......................................................................57
Planned Service ........................................................59
Repair Parts List ........................................................59
As with any mechanical equipment, personal injury can
result from contact with sharp sheet metal edges. Be
careful when you handle this equipment.
Issue 1917
CAUTION
*P507270-03*
(P) 507270-03
Page 1 of 60

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Summary of Contents for Lennox Allied Air A95UH1D

  • Page 1: Table Of Contents

    Manufactured By *P507270-03* Allied Air Enterprises LLC A Lennox International, Inc. Company 215 Metropolitan Drive (P) 507270-03 West Columbia, SC 29170 Save these instructions for future reference...

  • Page 2: Unit Dimensions

    Unit Dimensions 1 NOTE - C*20 and D*20 (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: Single side return air with transition, to accommodate 20 x 25 x 1 in.

  • Page 3: Parts Arrangement

    Parts Arrangement Figure 1. 507270-03 Issue 1917 Page 3 of 60...

  • Page 4: Gas Furnace

    Gas Furnace Shipping and Packing List The A95UH1D / A93UH1D / 95G1UHD / 92G1UHD 1 - Assembled Gas Furnace Category IV gas furnace is shipped ready for installation 1 - Bag assembly containing the following: in the upflow or horizontal position. The furnace is shipped with the bottom panel in place.
  • Page 5 Installed in Combination with a Cooling Coil Use only the type of gas approved for use with this furnace. Refer to unit nameplate. When this furnace is used with cooling units (Figure 4), A95UH1D / A93UH1D / 95G1UHD / 92G1UHD units are it shall be installed in parallel with, or on the upstream CSA International certified to ANSI Z21.47 and CSA 2.3 side of, cooling units to avoid condensation in the heating...

  • Page 6: General

    Use of Furnace as a Construction Heater NOTWITHSTANDING THE FOREGOING, INSTALLER IS RESPONSIBLE FOR CONFIRMING THAT THE USE Units may be used for heating of buildings or structures OF CONSTRUCTION HEAT IS CONSISTENT WITH under construction, if the following conditions are met to THE POLICIES AND CODES OF ALL REGULATING ensure proper operation.

  • Page 7: Combustion, Dilution & Ventilation Air

    of this information has been reprinted with permission from Combustion, Dilution & Ventilation Air the National Fuel Gas Code (ANSI-Z223.1/NFPA 54). This reprinted material is not the complete and official position If this unit is installed as a Non-Direct Vent Furnace, follow of ANSI on the referenced subject, which is represented the guidelines in this section.
  • Page 8 When the furnace is installed so that supply ducts carry air circulated by the furnace to areas outside the space containing the furnace, the return air must be handled by ducts which are sealed to the furnace casing and which terminate outside the space containing the furnace.
  • Page 9 Ventilation Louvers Inlet Air Roof Terminated (Minimum 12 in. Exhaust Pipe (305mm) above Attic Floor) *Intake Debris Screen (Provided) Furnace * See Maximum Vent Lengths table NOTE: The inlet and outlet air openings shall each have a free area of at least one square inch per 4,000 Btu (645 mm 1.17 kW) per hour of the total input rating of all equipment in the enclosure.

  • Page 10: Installation

    Allow for clearances to combustible materials as indicated Installation on the unit nameplate. Setting Equipment WARNING Improper installation of the furnace can result in WARNING personal injury or death. Combustion and flue products Do not connect the return air ducts to the back of the must never be allowed to enter the return air system or furnace.
  • Page 11 Markings are provided on both sides of the furnace cabinet for installations that require side return air. Cut the furnace cabinet at the maximum dimensions shown on Page 2. Furnace applications which include side return air and a condensate trap installed on the same side of the cabinet (trap can be installed remotely within 5 ft.) require either a return air base or field-fabricated transition to accommodate an optional IAQ accessory taller than 14.5”.
  • Page 12 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 16. Top/Plenum 1 in.

  • Page 13: Filters

    NOTE: Heavy-gauge sheet metal straps may be used to Filters suspend the unit from roof rafters or ceiling joists. When straps are used to suspend the unit in this way, support must be provided for both the ends. The straps must not This unit is not equipped with a filter or rack.
  • Page 14 unit operates properly and safely. Use fiberglass sealing Cement to bond the pipe to the flue collar, or to bond strips, caulking, or equivalent sealing method between the the 90° elbow or reducing 90° elbow to the flue collar. In plenum and the furnace cabinet to ensure a tight seal.
  • Page 15 STANDARD CONCENTRIC Outdoor Outdoor Exhaust 1-1/2” 2” 3” Exhaust Flush Accelerator Concentric Concentric Concentric VENT Accelerator Mount Kit Capacity PIPE DIA. (Dia. X Length) (Dia. X Length) (in.) 71M80 69M29 60L46 1-1/2” X 12” 2” X 12” 51W11 ** or 44W93+ +44W92++ +44W92++ 2-1/2...

  • Page 16: Venting Practices

    Seal any unused openings in the common venting Venting Practices system. Inspect the venting system for proper size and horizontal pitch. Determine that there is no blockage, restriction, leakage, corrosion, or other deficiencies which could cause an unsafe condition. Close all building doors and windows and all doors between the space in which the appliances remaining connected to the common venting system are located and other spaces of the building.
  • Page 17 Exhaust Piping See Figure 25 and Figure 26 In areas where piping penetrates joist or interior walls, hole must be large enough to allow clearance on all sides of pipe through center of hole using a hanger. When furnace is installed in a residence where unit is shut down for an extended period of time, such as a vacation home, make provisions for draining condensate collection from trap and lines.
  • Page 18 Use Figure 24 to correctly size vent pipe diameter. 045, 070, Furnace capacity? 090, 110, Standard or Which termination? Concentric? See Table 3 Which needs most Intake or elbows? Exhaust? How many? 2”, 2-1/2” Desired pipe size? or 3” What is the altitude? Use Table 5 or Table 6 to find max pipe length.
  • Page 19 A93UH1D and 92G1UH-P Maximum Allowable Intake or Exhaust Vent Length in Feet Standard Termination at Elevation 0 - 10,000 ft 2" Pipe 2-1/2" Pipe 3" Pipe Number of 90° Elbows Capacity Capacity Capacity Used Concentric Termination Elevation 0 - 10,000 ft 2"...
  • Page 20 A93UH1D and 92G1UH-P Maximum Allowable Exhaust Vent Length with Furnace Installed in a Closet or Basement Using Ventilated Attic or Crawl Space for Intake in Feet Standard Termination at Elevation 0 - 10,000 ft 2" Pipe 2-1/2" Pipe 3" Pipe Number of 90°...
  • Page 21 A95UH1D and 95G1UH-P Maximum Allowable Intake or Exhaust Vent Length in Feet Standard Termination at Elevation 0 - 4,500 ft 2" Pipe 2-1/2" Pipe 3" Pipe Number of 90° Elbows Capacity Capacity Capacity Used Standard Termination Elevation 4,501 - 10,000 ft 2"...
  • Page 22 A95UH1D and 95G1UH-P Maximum Allowable Intake or Exhaust Vent Length in Feet Concentric Termination at Elevation 0 - 4,500 ft 2" Pipe 2-1/2" Pipe 3" Pipe Number of 90° Elbows Capacity Capacity Capacity Used Concentric Termination Elevation 4,501 - 10,000 ft 2"...
  • Page 23 A95UH1D and 95G1UH-P Maximum Allowable Exhaust Vent Length with Furnace Installed in a Closet or Basement Using Ventilated Attic or Crawl Space for Intake in Feet Standard Termination at Elevation 0 - 4,500 ft 2" Pipe 2-1/2" Pipe 3" Pipe Number of 90°...
  • Page 24 Figure 25. Figure 26. Page 24 of 60 Issue 1917 507270-03...
  • Page 25 Figure 27. Figure 28. Intake Piping See Figure 27 through Figure 30 This gas furnace may be installed in either direct vent or non-direct vent applications. In non-direct vent applications, when intake air will be drawn into the furnace from the surrounding space, the indoor air quality must be considered and guidelines listed in Combustion, Dilution and Ventilation Air section must be followed.
  • Page 26 Figure 30. The air intake piping must not terminate too close to the flooring or a platform. Ensure that the intake air inlet will not be obstructed by loose insulation or other items that may clog the debris screen. Figure 29. If intake air is drawn from a ventilated attic (Figure 31) or ventilated crawlspace (Figure 32) the exhaust vent length must not exceed those listed in Table 5B...
  • Page 27 General Guidelines for Vent Terminations In Non–Direct Vent applications, combustion air is taken Roof Terminated from indoors and the flue gases are discharged to the Exhaust Pipe outdoors. This furnace is then classified as a non–direct vent, Category IV gas furnace. In Direct Vent applications, combustion air is taken from Inlet Air outdoors and the flue gases are discharged to the outdoors.
  • Page 28 VENT TERMINATION CLEARANCES FOR NON-DIRECT VENT INSTALLATIONS IN THE US AND CANADA INSIDE CORNER DETAIL Fixed Operable Fixed Closed Closed Operable AREA WHERE TERMINAL AIR SUPPLY INLET VENT TERMINAL IS NOT PERMITTED US Installations Canadian Installations Clearance above grade, veranda, 12 inches (305mm) or 12 in.
  • Page 29 VENT TERMINATION CLEARANCES FOR DIRECT VENT INSTALLATIONS IN THE USA AND CANADA INSIDE CORNER DETAIL Fixed Operable Fixed Closed Closed Operable AREA WHERE TERMINAL AIR SUPPLY INLET VENT TERMINAL IS NOT PERMITTED US Installations Canadian Installations Clearance above grade, veranda, 12 inches (305mm) or 12 in.
  • Page 30 Details of Intake and Exhaust Piping In both Non–Direct Vent and Direct Vent applications, the vent termination is limited by local building codes. In the Terminations for Direct Vent Installations absence of local codes, refer to the current National Fuel NOTE: In Direct Vent installations, combustion air is taken Gas Code ANSI Z223-1/NFPA 54 in U.S.A., and current from outdoors and flue gases are discharged to outdoors.
  • Page 31 the intake pipe without a termination elbow is 8” and a 3” (76MM) MIN. SIZE PER EXHAUST PIPE minimum distance of 6” with a termination elbow. See Inches (MM) TERMINATION SIZE Figure 44. REDUCTION TABLE If intake and exhaust piping must be run up a side UNCONDITIONED ATTIC SPACE wall to position above snow accumulation or other...
  • Page 32 FIELD-PROVIDED STRAIGHT-CUT OR ANGLE-CUT IN DIRECTION REDUCER MAY BE REQUIRED 3”-8” 1-1/2” (38mm) accelerator OF ROOF SLOPE TO ADAPT LARGER VENT (76MM-203MM) provided on 71M80 & 44W92 PIPE SIZE TO TERMINATION kits for -45 and -70 units OUTSIDE 8” - 12” INTAKE WALL (203MM - 305MM)
  • Page 33 FIELD FABRICATED WALL TERMINATION NOTE − FIELD−PROVIDED REDUCER MAY BE 2” (51mm) 3” (76mm) REQUIRED TO ADAPT LARGER VENT PIPE SIZE Vent Pipe Vent Pipe TO TERMINATION A− Minimum clearance above grade or average 12” (305 mm) 12” (305 mm) snow accumulation B−...
  • Page 34 Details of Exhaust Piping Terminations for Non- Direct Vent Applications Exhaust pipes may be routed either horizontally through an outside wall or vertically through the roof. In attic or closet installations, vertical termination through the roof SIZE TERMINATION PER EXHAUST PIPE is preferred.
  • Page 35 Exhaust through Crawl Space Vent Option All 33” condensing gas furnaces (92%+) are now approved Exhaust from to be vented down through a crawl space. Ensure a vent Furnace pipe drain kit, 51W18 (USA) or 15Z70 (Canada), is used as To Termination directed through the floor joists and into the crawl space.

  • Page 36: Condensate Piping

    Install drain trap using appropriate PVC fittings, glue Condensate Piping all joints. Glue the provided drain trap as shown in Figure 58. Route the condensate line to an open drain. This unit is designed for either right or left side exit of Condensate line must maintain a 1/4”...
  • Page 37 * Piping from furnace must slope down a minimum of 1/4” per ft. toward trap. Figure 54. Evaporator Coil Using a Separate Drain (Unit shown in horizontal right-hand discharge position) Figure 55. Evaporator Coil Using a Separate Drain Figure 56. Evaporator Coil Using a Common Drain * Piping from furnace must slope down a minimum of 1/4”...
  • Page 38 Figure 58. Trap / Drain Assembly Using 1/2” PVC or 3/4” PVC Page 38 of 60 Issue 1917 507270-03...

  • Page 39: Gas Piping

    When connecting gas supply, factors such as length of run, number of fittings and furnace rating must be considered to avoid excessive pressure drop. Table 9 list recommended pipe sizes for typical applications. NOTE: Use two wrenches when connecting gas piping to avoid transferring to the manifold.
  • Page 40 IMPORTANT WARNING FIRE OR EXPLOSION HAZARD When testing pressure of gas lines, gas valve must be disconnected and isolated. See Figure 60. Gas valves Failure to follow the safety warnings exactly could can be damaged if subjected to pressures greater than result in serious injury, death, or property damage.
  • Page 41 Gas Pipe Capacity - FT³/HR (kL/HR) Nominal Length of Pipe - feet (m) Internal Iron Pipe Diameter Size - - inches inches (3.048) (6.096) (9.144) (12.192) (15.240) (18.288) (21.336) (24.384) (27.432) (30.480) (mm) (mm) .622 (12.7) (17.799) (4.96) (3.40) (2.75) (2.32) (2.07) (1.87)

  • Page 42: Electrical

    The unit is equipped with a field makeup box. The makeup Electrical box may be moved to the right side of the furnace to facilitate installation. Seal unused openings on left side ELECTROSTATIC DISCHARGE (ESD) with plugs removed from right side. Secure the excess wire to the existing harness to protect it from damage.
  • Page 43 Indoor Blower Speeds use an external relay. See Figure 68 for control board configuration. This terminal is energized in the heating When the thermostat is set to “FAN ON”, the indoor mode when the combustion air inducer is operating. blower will run continuously on the heating speed when there is no cooling or heating demand.
  • Page 44 Figure 67. Typical Wiring Diagram Page 44 of 60 Issue 1917 507270-03...

  • Page 45: Unit Start-Up

    Terminal Designations Humidifier (120 VAC) LINE Input (120 VAC) XFMR Transformer (120 VAC) Electronic Air Cleaner (120 VAC) COOL Blower - Cooling Speed (120 VAC) HEAT Blower - Heating Speed (120 VAC) PARK Dead terminals to park alternate speed taps NEUTRALS Neutral terminals (120 VAC) Figure 68.
  • Page 46 Priming Condensate Trap Move gas valve switch to ON. See Figure 69. The condensate trap should be primed with water prior Replace the upper access panel. to start-up to ensure proper condensate drainage. Either 10. Turn on all electrical power to the unit. pour 10 fl.
  • Page 47 Gas Pressure Adjustment Start unit and allow 5 minutes for unit to reach steady state. Gas Flow (Approximate) While waiting for the unit to stabilize, observe the Seconds for One Revolution flame. Flame should be stable and should not lift from Natural burner.
  • Page 48 Burner Orifice Conversion Kits at Varying Altitudes 0 - 7,500 ft 7,501 - 10,000 ft (0 - 2,286 m) (2,286 - 3,048 m) Capacity High Altitude High Altitude Natural to LP/ LP/Propane to Natural Burner LP/Propane Burner Propane Natural Orifice Kit Orifice Kit 11K50+ 73W80*...

  • Page 49: 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 Seal any unused openings in the venting system. Visually inspect the venting system for proper size WARNING and horizontal pitch. Determine there is no blockage CARBON MONOXIDE POISONING HAZARD or restriction, leakage, corrosion, or other deficiencies which could cause an unsafe condition.

  • Page 50: Other Unit Adjustments

    Thermostat Heat Anticipation Other Unit Adjustments Set the heat anticipator setting (if adjustable) according to the amp draw listed on the wiring diagram that is attached to the unit. Primary Limit The primary limit is located on the heating compartment Electrical vestibule panel.

  • Page 51: Blower Performance A93Uh1D / 92G1Uh

    Blower Performance A93UH1D / 92G1UH A93UH1D / 92G1UH 045*B08 Performance (Less Filter) External Air Volume / Watts at Various Blower Speeds Static High Medium-High Medium-Low Pressure Watts Watts Watts Watts in. w.c. 0.00 1140 0.10 1135 0.20 1125 0.30 1090 0.40 1065 0.50...
  • Page 52 A93UH1D / 92G1UH 070*B12 Performance (Less Filter) External Air Volume / Watts at Various Blower Speeds Static High Medium-High Medium-Low Pressure Watts Watts Watts Watts in. w.c. 0.00 1615 1355 1140 1030 0.10 1565 1365 1150 1020 0.20 1535 1340 1150 1025 0.30...
  • Page 53 A93UH1D / 92G1UH 110*C16 Performance (Less Filter) External Air Volume / Watts at Various Blower Speeds Static High Medium-High Medium-Low Pressure Watts Watts Watts Watts in. w.c. 0.00 2030 1750 1425 1225 0.10 1950 1755 1430 1215 0.20 1935 1675 1455 1230 0.30...

  • Page 54: Blower Performance A95Uh1D / 95G1Uhd

    Blower Performance A95UH1D / 95G1UHD A95UH1D / 95G1UH 045*B08 Performance (Less Filter) External Air Volume / Watts at Various Blower Speeds Static High Medium-High Medium-Low Pressure Watts Watts Watts Watts in. w.c. 0.00 1140 0.10 1135 0.20 1125 0.30 1090 0.40 1065 0.50...
  • Page 55 A95UH1D / 95G1UH 090*C12 Performance (Less Filter) External Air Volume / Watts at Various Blower Speeds Static High Medium-High Medium-Low Pressure Watts Watts Watts Watts in. w.c. 0.00 1630 1345 1090 0.10 1615 1320 1070 0.20 1580 1305 1070 0.30 1525 1295 1060...
  • Page 56 A95UH1D / 95G1UH 110*C20 Performance (Less Filter) Air Volume / Watts at Various Blower Speeds Bottom Return Air, Side Return Air with Optional Return Air Base, Single Side Return Air - Air volumes in bold require field fabricated External Return Air from Both Sides or Return Air from Bottom and One Side. transition to accommodate 20 x 25 x 1 in.

  • Page 57: Service

    Winterizing and Condensate Trap Care Service Turn off power to the furnace. Have a shallow pan ready to empty condensate water. Remove the clean out cap from the condensate trap WARNING and empty water. Inspect the trap then reinstall the ELECTRICAL SHOCK, FIRE, OR EXPLOSION clean out cap.
  • Page 58 19. Remove the primary limit from the vestibule panel. 41. Reconnect flame rollout switch wires. 20. Remove top cap screws to allow top cap to be 42. Reconnect sensor wire and reconnect 2 pin plug from tilted upward to allow clearance for removing heat ignitor.

  • Page 59: Planned Service

    Planned Service A service technician should check the following items Problems detected during the inspection may make it during an annual inspection. Power to the unit must be necessary to temporarily shut down the furnace until the shut off for safety. items can be repaired or replaced.
  • Page 60 Requirements for Commonwealth of Massachusetts Modifications to NFPA-54, Chapter 10 INSPECTION. The state or local gas inspector of the side wall, horizontally vented, gas-fueled equipment Revise NFPA-54 section 10.8.3 to add the following shall not approve the installation unless, upon requirements: inspection, the inspector observes carbon monoxide For all side wall, horizontally vented, gas-fueled equipment...

This manual is also suitable for:

Allied air a93uh1dAllied air 95g1uh-pAllied air 92g1uh-p045-08045-12070-08 ... Show all

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