Armstrong A93UH - User Manual

506501-01 Page 1 of 48Issue 1031
*506501-01*
This manual must be left with the homeowner for future reference.
INSTALLATION INSTRUCTIONS
A95UH, A93UH, 95G1UH & 92G1UH
Warm Air Gas Furnace
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.
CAUTION
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
Manufactured By
Allied Air Enterprises, Inc.
A Lennox International, Inc. Company
215 Metropolitan Drive
West Columbia, SC 29170
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
TABLE OF CONTENTS
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

Summary

Installation Safety and Compliance

Safety Information

Essential safety precautions and warnings for furnace installation, operation, and maintenance.

Furnace Installation and Usage

Installed Locations

General Installation and Air Requirements

Combustion, Dilution & Ventilation Air

Critical requirements for providing adequate air for combustion and ventilation.

Equipment Setup and Orientation

Setting Equipment

Procedures for leveling the furnace and ensuring proper drainage for the heat exchanger.

Clearances and Airflow Management

Installation Clearances

Required clearances around the furnace for safe operation and service access.

Return Air Guidelines

Venting Practices

Vent Piping Guidelines

Gas Piping and Leak Detection

Gas Piping Installation

Procedures for connecting the gas supply, including pipe routing, support, and pressure considerations.

Leak Check Procedures

Critical steps for detecting gas leaks after piping is installed to ensure safety.

Electrical Setup and Safety

Electrical Connections

Control Systems and Unit Operation

Wiring Diagrams and Thermostat

Start-Up and Gas Valve Operation

Unit Start-Up Procedures

Procedures and safety checks required before operating the furnace for the first time.

Gas Valve Operation and Heating Sequence

Gas Pressure and Altitude Adjustments

Gas Pressure Adjustment

Instructions for measuring and adjusting gas pressure for optimal furnace performance.

Venting and Airflow Testing

Furnace Maintenance and Cleaning

Service Guidelines

Start-Up and Operation Verification

Start-Up & Performance Check List

A checklist to verify proper installation and initial performance of the furnace.

Unit Operation Checks

Procedures for checking furnace operation in heating and cooling modes for performance verification.

Armstrong A93UH Specifications

General

Brand	Armstrong
Model	A93UH
Category	Furnace
Language	English