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Lennox Allied Air A96UH2E User Manual

Lennox Allied Air A96UH2E
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507581-04 Page 1 of 60Issue 2128
This manual must be left with the homeowner for future reference.
INSTALLATION INSTRUCTIONS
A96UH2E
Warm Air Gas Furnace
Upow/Horizontal Left Air Discharge
Direct Vent & Non-Direct Vent
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.
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.
WARNING
As with any mechanical equipment, personal injury can
result from contact with sharp sheet metal edges. Be
careful when you handle this equipment.
CAUTION
Save these instructions for future reference
(P) 507581-04
*P507581-04*
Manufactured By
Allied Air Enterprises LLC
A Lennox International, Inc. Company
215 Metropolitan Drive
West Columbia, SC 29170
Table of Contents
Unit Dimensions ............................................................2
Parts Arrangement.........................................................3
A96UH2E Gas Furnace .................................................4
Shipping and Packing List .............................................4
Safety Information .........................................................4
General ..........................................................................6
Combustion, Dilution & Ventilation Air ...........................7
Installation ...................................................................10
Filters ...........................................................................14
Duct System ................................................................14
Venting.........................................................................16
Condensate Piping ......................................................34
Gas Piping ...................................................................38
Electrical ......................................................................41
Blower Performance ....................................................50
Unit Start-Up ................................................................53
Other Unit Adjustments................................................56
Service.........................................................................56
Planned Service ..........................................................58
Repair Parts List ..........................................................59
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Lennox Allied Air A96UH2E Specifications

General IconGeneral
BrandLennox
ModelAllied Air A96UH2E
CategoryFurnace
LanguageEnglish

Summary

Unit Dimensions

Parts Arrangement

A96UH2E Gas Furnace

Shipping and Packing List

Details contents of the furnace packaging and instructions for checking damage.

Safety Information

Provides essential safety warnings, including CAUTION and WARNING statements for handling and installation.

Building Codes

Use of Furnace as a Construction Heater

General

Provides general guidance and recommendations for furnace installation, emphasizing compliance with local codes.

Combustion, Dilution & Ventilation Air

Unconfined Space

Describes an unconfined space and its air volume requirements for proper furnace operation.

Confined Space

Defines a confined space and its air volume requirements for proper furnace operation.

Installation

Setting Equipment

Provides instructions on furnace placement, leveling, and tilt for proper drainage.

Shipping Bolt Removal

Instructions for removing shipping bolts from the blower motor's flexible legs.

Upflow Applications

Guidelines for installing the furnace in an upflow configuration, including clearances.

Return Air Guidelines

Rules for connecting return air ducts, ensuring airtight seals and proper airflow.

Removing the Bottom Panel

Steps to remove the bottom panel for access or configuration changes.

Horizontal Applications

Information and considerations for installing the furnace in horizontal positions.

Platform Installation of Horizontal Unit

Steps for constructing and installing the furnace on a platform in horizontal applications.

Suspended Installation of Horizontal Unit

Guidance on suspending the furnace for horizontal installation in attics or crawl spaces.

Filters

Duct System

Supply Air Plenum

Details requirements for the supply air plenum, including access panels for inspection.

Return Air Plenum

Explains requirements for the return air plenum, emphasizing avoiding hazardous air sources.

Venting

Piping Suspension Guidelines

Guidelines for supporting vent pipes to prevent vibration transmission and ensure proper installation.

Wall Thickness Guidelines

Provides guidance on clearances and wall penetrations for vent pipe installations.

Removal of the Furnace from Common Vent

Instructions for safely removing a furnace from a common venting system and testing remaining appliances.

Exhaust Piping

Vent Piping Guidelines

Provides guidelines for vent pipe sizing, routing, and termination, including direct and non-direct vent types.

Details of Intake and Exhaust Piping Terminations for Direct Vent Installations

Table 7. Exhaust Pipe Termination Size Reduction

Lists exhaust pipe size reductions needed for specific termination types and models.

Details of Exhaust Piping Terminations for Non-Direct Vent Applications

Figure 44. Non-Direct Vent Roof Termination Kit

Illustrates the installation of a non-direct vent roof termination kit.

Figure 45. Non-Direct Vent Field Supplied Wall Termination

Illustrates field-supplied wall termination for non-direct vent systems.

Figure 46. Non-Direct Vent Field Supplied Wall Termination Extended

Shows extended wall termination requirements and supports for non-direct vent systems.

Figure 47. Non-Direct Vent Application Using Existing Chimney

Illustrates using an existing chimney for non-direct vent applications.

Intake Piping

TYPICAL INTAKE PIPE CONNECTIONS IN UPFLOW DIRECT OR NON-DIRECT VENT APPLICATIONS (Figure 27)

Illustrates typical intake pipe connections for upflow direct/non-direct vent.

TYPICAL INTAKE PIPE CONNECTIONS IN HORIZONTAL DIRECT OR NON-DIRECT VENT APPLICATION (Figure 28)

Illustrates typical intake pipe connections for horizontal direct/non-direct vent.

TYPICAL AIR INTAKE PIPE CONNECTIONS UPFLOW NON-DIRECT VENT APPLICATIONS (Figure 29)

Shows intake pipe connections for upflow non-direct vent applications.

TYPICAL AIR INTAKE PIPE CONNECTIONS HORIZONTAL NON-DIRECT VENT APPLICATIONS (Figure 30)

Shows intake pipe connections for horizontal non-direct vent applications.

Condensate Piping

CONDENSATE TRAP AND PLUG LOCATIONS (Figure 52)

Shows the location of the condensate trap and plugs on the furnace unit.

Figure 53. Condensate Trap Locations (Unit shown in upflow position with remote trap)

Illustrates condensate trap locations, including options for remote installation.

Figure 54. Unit with Evaporator Coil

Depicts how the furnace and evaporator coil drains connect together for a common drain.

Figure 55. Evaporator Coil Using a Common Drain

Illustrates common drain connection for evaporator coil and furnace.

Figure 56. Condensate Trap with Optional Overflow Switch

Shows condensate trap with an optional overflow switch for safety.

Figure 57. Evaporator Coil Using a Common Drain

Illustrates common drain connection for evaporator coil and furnace.

Figure 58. Evaporator Coil Using a Common Drain

Illustrates common drain connection for evaporator coil and furnace.

Figure 59. Trap / Drain Assembly Using 1/2" PVC or 3/4" PVC

Details trap and drain assembly configurations using different PVC pipe sizes.

Gas Piping

Leak Check

Details the critical process of checking gas piping connections for leaks using a leak detection solution.

Fire or Explosion Hazard

Warns about fire and explosion hazards and the importance of following safety procedures exactly.

Figure 61. Gas Piping Upflow Configuration

Shows typical gas piping configurations for upflow installations.

Figure 62. Gas Piping Horizontal Configuration

Shows typical gas piping configurations for horizontal installations.

Electrical

ELECTROSTATIC DISCHARGE (ESD) Precautions and Procedures

Provides precautions to protect electronic controls from electrostatic discharge during installation and service.

Generator Use - Voltage Requirements

Outlines voltage, frequency, and waveform requirements when using a generator.

Thermostat

Guidelines for selecting thermostat location and making low voltage connections to the control board.

Figure 65. Control Board

Diagram of the integrated control board, showing terminals and connections.

Integrated Control DIP Switch Settings

Heating Operation DIP Switch Settings -- Switch 1 -- Thermostat Selection

Explains how to set DIP switch 1 to select single-stage or two-stage thermostat operation.

Switch 2 -- Second Stage Delay

Describes how to set the delay for second-stage heating activation based on thermostat type.

Indoor Blower Operation DIP Switch Settings Switches 3 and 4 -- Heating Mode Blower-Off Delay

Details how to adjust the blower off delay for heating mode to optimize comfort and air temperature.

Switch 5 -- Cooling Mode Blower-Off Delay

Explains how to adjust the blower off delay for cooling mode operation.

Switches 6 and 7 -- Continuous Fan Mode

Describes how to set DIP switches for continuous fan operation and speed selection.

Field Wiring Applications With Conventional Thermostat

Table 13A.

Illustrates wiring connections for various thermostat types and system configurations.

Table 13B.

Illustrates wiring connections for various thermostat types and system configurations.

Table 13C.

Illustrates wiring connections for various thermostat types and system configurations.

Table 13D.

Illustrates wiring connections for various thermostat types and system configurations.

Blower Performance

A96UH2E030B08 Performance (Less Filter)

Provides air volume and wattage data for the 030B08 model at various blower speeds and static pressures.

A96UH2E045B12 Performance (Less Filter)

Provides air volume and wattage data for the 045B12 model at various blower speeds and static pressures.

A96UH2E070B12 Performance (Less Filter)

Provides air volume and wattage data for the 070B12 model at various blower speeds and static pressures.

A96UH2E090C16 Performance (Less Filter)

Provides air volume and wattage data for the 090C16 model at various blower speeds and static pressures.

A96UH2E110C20 Performance (Less Filter)

Provides air volume and wattage data for the 110C20 model at various blower speeds and static pressures.

Unit Start-Up

FOR YOUR SAFETY READ BEFORE OPERATING

Emphasizes reading safety information before attempting any operation or service.

Placing the Furnace into Operation

Details the process of starting the furnace, including its automatic hot surface ignition system.

Gas Valve Operation

Instructions for safely operating the gas valve, including manual control and safety checks.

Turning Off Gas to Unit

Provides steps to safely turn off the gas supply to the furnace for maintenance or emergencies.

Failure to Operate

Lists common issues and checks to perform if the furnace fails to operate correctly.

Heating Sequence of Operation

Describes the step-by-step process the furnace follows when calling for heat, from ignition to combustion.

Other Unit Adjustments

Primary Limit

Information on the primary limit control, its location, and factory settings.

Flame Rollout Switches (Two)

Describes the location and manual reset function of the flame rollout switches.

Pressure Switch

Details the pressure switch function in verifying combustion air inducer operation.

Temperature Rise

Explains how to check and adjust blower speed to maintain proper temperature rise for efficient operation.

Fan Control

Information on the fan's ON time and adjustable OFF delay settings for comfort.

Thermostat Heat Anticipation

Guidance on setting the heat anticipator based on the unit's amp draw.

Electrical

Steps for checking wiring, voltage, and amp draw on electrical components.

Winterizing and Condensate Trap Care

Instructions for winterizing the unit and caring for the condensate trap during periods of non-use.

Cleaning Heat Exchanger

Detailed procedures for cleaning the heat exchanger, including disassembly and reassembly.

Cleaning the Burner Assembly

Step-by-step instructions for cleaning the furnace burners and inspecting for blockages.

Planned Service

Repair Parts List

Cabinet Parts

Lists available replacement cabinet components such as access panels and top cap.

Control Panel Parts

Lists available replacement control panel components like transformer and integrated control board.

Blower Parts

Lists available replacement blower parts including wheel, motor, and housing components.

Heating Parts

Lists available replacement heating components like heat exchanger, gas manifold, and ignitor.

Requirements for Commonwealth of Massachusetts

Modifications to NFPA-54, Chapter 10

Outlines specific modifications to NFPA-54, Chapter 10, related to carbon monoxide detectors and signage.

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