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Allied 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.
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
Parts Arrangement............................................................. 3
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
.......................................................................... 13
Duct System .................................................................... 13
Pipe & Fittings Specifications .......................................... 13
Joint Cementing Procedure ............................................. 15
Venting Practices ............................................................. 16
*P507270-03*
(P) 507270-03
507270-03
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 .................................................... 18
Gas Piping ....................................................................... 38
Electrical .......................................................................... 41
Unit Start-Up .................................................................... 44
Gas Pressure Adjustment ................................................ 46
High Altitude Information ................................................. 46
Other Unit Adjustments.................................................... 49
Blower Motor Performance .............................................. 50
Service .......................................................................... 54
Planned Service .............................................................. 56
Diagnostic Codes ............................................................ 56
Repair Parts List .............................................................. 57
Start-Up & Performance Check List ................................ 58
A Lennox International, Inc. Company
Issue 1621
WARNING
Manufactured By
Allied Air Enterprises LLC
215 Metropolitan Drive
West Columbia, SC 29170
Page 1 of 60

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  • Page 1: Table Of Contents

    INSTALLATION INSTRUCTIONS A95UH1D,A93UH1D,95G1UH-P & 92G1UH-P 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

    A95UH1D, A93UH1D, 95G1UHD & 92G1UHD 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: Parts Arrangement

    EXPANDED VIEW Figure 1 507270-03 Issue 1621 Page 3 of 60...

  • Page 4: Gas Furnace

    A95UH1D, A93UH1D, 95G1UH-P & 92G1UH-P Gas Shipping and Packing List Furnace 1 - Assembled Gas Furnace The A95UH1D/A93UH1D/95G1UHD & 92G1UHD Category 1 - Bag assembly containing the following: IV gas furnace is shipped ready for installation in the upflow 1 - Snap bushing or horizontal position.

  • Page 5: Use Of Furnace As A Construction Heater

    In Canada, installation must conform with current National In Canada, all electrical wiring and grounding for the unit Standard of Canada CSA-B149 Natural Gas and Propane must be installed according to the current regulations of Installation Codes, local plumbing or waste water codes and the Canadian Electrical Code Part I (CSA Standard C22.1) other applicable local codes.

  • Page 6: General

    • The input rate and temperature rise must be set per the furnace rating plate. WARNING • One hundred percent (100%) outdoor air must be provided for combustion air requirements during construction. The State of California has determined that this product may contain or produce a chemical or chemicals, in Temporary ducting may supply outdoor air to the furnace.
  • 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 will build to the point that a down draft can occur in the the windows and doors, follow the procedures in the “Air furnace vent pipe or chimney.
  • Page 8 Air from Outside Equipment in Confined Space - All Air from Outside If air from outside is brought in for combustion and (All Air through Ventilated Attic) 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”...

  • Page 9: Setting Equipment

    INSTALLATION Equipment in Confined Space - All Air from Outside Setting Equipment WARNING 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 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 furnace is installed on a platform with bottom return, make personal injury or death.
  • Page 11 Optional Return Air Base (Upflow Applications Only) Figure 15 panel. Once the bottom panel has been removed, reinstall the bottom cap. See Figure 16. Removing the Bottom Panel Horizontal Applications WARNING Do not install the furnace on its front or its back. See Figure 17.
  • Page 12 Typical Horizontal Application Horizontal Application Installation Clearances Figure 19 NOTE: Heavy-gauge sheet metal straps may be used to 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 interfere with the plenum or exhaust piping installation.

  • 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 A95UH1D/A93UH1D/95G1UH-P & 92G1UH-P exhaust Solvent cements for plastic pipe are flammable liquids and intake connections are made of PVC. Use PVC and should be kept away from all sources of ignition. primer and solvent cement when using PVC vent pipe.

  • 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 specifications outlined in ASTM D 2855. or rough edges.

  • Page 16: Venting Practices

    Removal of the Furnace from Common Vent 6. Promptly apply solvent cement to end of pipe and inside socket surface of fitting. Cement should be applied In the event that an existing furnace is removed from a lightly but uniformly to inside of socket. Take care to venting system commonly run with separate gas appliances, keep excess cement out of socket.
  • Page 17 Exhaust Piping (Figures 25 and 26) 5. After the main burner has operated for 5 minutes, test for leaks of flue gases at the draft hood relief opening. 1. In areas where piping penetrates joist or interior walls, Use the flame of a match or candle. hole must be large enough to allow clearance on all 6.

  • Page 18: Vent Piping Guidelines

    Tables 4 and 5 or 6. Table 4 lists the minimum vent pipe lengths permitted. Table 5 lists the maximum pipe lengths permitted for A93UH1D and 92G1UH-P. Table 6 lists the maximum pipe lengths permitted for A95UH1D and 95G1UH-P. Regardless of the diameter of pipe used, the standard roof and wall terminations described in section Exhaust Piping Terminations should be used.
  • Page 19 A93UH1D and 92G1UH-P 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. Table 5A A93UH1D and 92G1UH-P Table 5B 507270-03...
  • Page 20 A95UH1D and 95G1UH-P 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. Table 6A...
  • Page 21 A95UH1D and 95G1UH-P Maximum Allowable Intake or Exhaust Vent Length in Feet Table 6B 507270-03 Issue 1621 Page 21 of 60...
  • Page 22 Figure 25 Figure 26 Page 22 of 60 Issue 1621 507270-03...
  • Page 23 Figure 27 Figure 28 Intake Piping (Figures 27 through 30) 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 outdoors and flue gases are discharged outdoors. The or non-direct vent applications.
  • Page 24 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 25 General Guidelines for Vent Terminations exhaust piping should be insulated with 1/2” (13 mm), Armaflex or equivalent. In extremely cold climate areas with In Non–Direct Vent applications, combustion air is taken temperature below 20° F (6.7° C) it is recommended that, from indoors and the flue gases are discharged to the 3/4”...
  • Page 26 Figure 31 Page 26 of 60 Issue 1621 507270-03...
  • Page 27 Figure 32 507270-03 Issue 1621 Page 27 of 60...
  • Page 28 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 29 Figure 36 507270-03 Issue 1621 Page 29 of 60...
  • Page 30 Figure 37 Page 30 of 60 Issue 1621 507270-03...
  • Page 31 5. On field supplied terminations for sidewall exit, exhaust piping may extend a maximum of 12 inches (305 mm) 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 32 Figure 40 Figure 43 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 is preferred.
  • Page 33 Figure 44 Figure 46 Figure 45 3. If exhaust piping must be run up a sidewall to position above snow accumulation or other obstructions, piping must be supported every 24” (610 mm) as shown in Figure 46. When exhaust piping must be run up an outside wall, any reduction in exhaust pipe size must Figure 47 be done after the final elbow.
  • Page 34 Condensate Piping NOTE: If necessary the condensate trap may be installed This unit is designed for either right or left side exit of up to 5’ away from the furnace. Use PVC pipe to connect condensate piping in upflow applications. In horizontal trap to furnace condensate outlet.
  • Page 35 Condensate line must slope downward away from the trap to drain. If drain level is above condensate trap, condensate CAUTION pump must be used. Condensate drain line should be routed within the conditioned space to avoid freezing of condensate Do not use copper tubing or existing copper condensate and blockage of drain line.
  • Page 36 IMPORTANT Evaporator Coil Using a Common Drain When combining the furnace and evaporator coil drains together, the A/C condensate drain outlet must be vented to relieve pressure in order for the furnace pressure switch to operate properly. Condensate Trap with Optional Overflow Switch Figure 53 Figure 52 Evaporator Coil Using a Common Drain...
  • Page 37 Trap / Drain Assembly Using 1/2” PVC or 3/4” PVC Figure 55 507270-03 Issue 1621 Page 37 of 60...

  • Page 38: 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 39 Figure 57 Figure 58 507270-03 Issue 1621 Page 39 of 60...
  • Page 40 Table 10 Page 40 of 60 Issue 1621 507270-03...

  • Page 41: 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 42 Indoor Blower Speeds 1. When the thermostat is set to “FAN ON”, the indoor blower will run continuously on the heating speed when there is no cooling or heating demand. 2. When the furnace is running in the heating mode, the indoor blower will run on the heating speed.
  • Page 43 TYPICAL WIRING DIAGRAM Figure 63 507270-03 Issue 1621 Page 43 of 60...

  • Page 44: Unit Start-Up

    INTEGRATED CONTROL (Automatic Hot Surface Ignition System) Figure 64 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 45 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.

  • Page 46: Gas Pressure Adjustment

    Gas Pressure Adjustment 3. While waiting for the unit to stabilize, observe the flame. Flame should be stable and should not lift from burner. Gas Flow (Approximate) Natural gas should burn blue. 4. After allowing unit to stabilize for 5 minutes, record manifold pressure and compare to value given in Table NOTE: Shut unit off and remove manometer as soon as an accurate reading has been obtained.
  • Page 47 Burner Orifice Conversion Kits at Varying Altitudes 0 - 7500 ft 7501 - 10000 ft (0 - 2286 m) (2286 - 3048 m) Unit High Altitude High Altitude Size Natural LP/Propane Natural LP/Propane Burner Orifice Burner Orifice LP/Propane Natural 11K50+ 73W80* 51W01 11K45+...
  • Page 48 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 CARBON MONOXIDE POISONING HAZARD of flue gases at the draft hood relief opening after 5 Failure to follow the steps outlined below for each...

  • Page 49: 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 50: Blower Motor Performance

    Page 50 of 60 Issue 1621 507270-03...
  • Page 51 507270-03 Issue 1621 Page 51 of 60...
  • Page 52 BLOWER DATA A95UH1D / 95F1UHD Page 52 of 60 Issue 1621 507270-03...
  • Page 53 507270-03 Issue 1621 Page 53 of 60...

  • Page 54: Service

    Service Electrical 1. Check all wiring for loose connections. WARNING 2. Check for the correct voltage at the furnace (with furnace operating). Correct voltage is 120 VAC ± 10% ELECTRICAL SHOCK, FIRE, 3. Check amp-draw on the blower motor with the blower OR EXPLOSION HAZARD.
  • Page 55 15. Mark and remove wires from pressure switch. Remove 40. Reconnect gas supply line to gas valve. pressure switch. Keep tubing attached to pressure 41. Reconnect flame rollout switch wires. switch. 42. Reconnect sensor wire and reconnect 2 pin plug from 16.

  • Page 56: 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 57: 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.

  • Page 58: Start-Up & Performance Check List

    Start-Up & Performance Check List UNIT SET UP Furnace: Model Number_______________ Serial Number_________________ SUPPLY Line Voltage GAS SUPPLY LP Propane Gas Natural Gas Piping Connections Tight Leak Tested Flter RETURN AIR Gas Supply Pressure DUCT SYSTEM SUPPLY AIR DUCT Sealed Insulated (if necessary) RETURN DUCT Sealed...

  • Page 59: Issue

    UNIT OPERATION HEATING MODE COOLING MODE INDOOR BLOWER AMPS______ COMBUSTION SAMPLE CO CO PPM_______ TEMPERATURE DROP ______ Return Duct Temperature _________ INDOOR BLOWER AMPS______ Supply Duct Temperature _______ Temperature Drop = _________ TEMPERATURE RISE TOTAL EXTERNAL STATIC (dry coil) Supply Duct Temperature ________ Supply External Static _______ Return Duct Temperature _____...
  • Page 60 REQUIREMENTS for COMMONWEALTH of MASSACHUSETTS Modifications to NFPA-54, Chapter 10 4. 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...

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