Armstrong A95UH 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

Armstrong A95UH Specifications

General

Brand	Armstrong
Model	A95UH
Category	Furnace
Language	English

Summary

Furnace Safety Information

Combustion Air Requirements

Combustion, Dilution & Ventilation Air

Details requirements for air supply for combustion and ventilation.

Unconfined Space

Confined Space

Pipe and Fittings Specifications

PIPING AND FITTINGS SPECIFICATIONS

Comprehensive list of pipe types, fittings, primer, and cement specifications.

Venting System Practices

Vent Piping Sizing and Guidelines

Vent Piping Guidelines

Instructions and steps for correctly sizing and installing vent pipe diameters.

MINIMUM VENT PIPE LENGTHS

Exhaust Pipe and Condensate Trap Installation

TYPICAL EXHAUST PIPE CONNECTIONS AND CONDENSATE TRAP INSTALLATION IN UPFLOW DIRECT OR NON-DIRECT VENT APPLICATIONS

Diagrams showing exhaust pipe and condensate trap setup for upflow installations.

TYPICAL EXHAUST PIPE CONNECTIONS AND CONDENSATE TRAP INSTALLATION IN HORIZONTAL DIRECT OR NON-DIRECT VENT APPLICATIONS

Diagrams showing exhaust pipe and condensate trap setup for horizontal installations.

Air Intake Pipe Connections

TYPICAL AIR INTAKE PIPE CONNECTIONS IN UPFLOW DIRECT VENT APPLICATIONS

Diagrams showing air intake pipe setup for upflow direct vent applications.

TYPICAL AIR INTAKE PIPE CONNECTIONS IN HORIZONTAL DIRECT VENT APPLICATIONS

Diagrams showing air intake pipe setup for horizontal direct vent applications.

Intake Piping

General guidance on intake piping for direct and non-direct vent applications.

Vent Termination Guidelines

General Guidelines for Vent Terminations

Discusses vent termination placement, local codes, and protective coatings.

Non-Direct Vent Termination Clearances

VENT TERMINATION CLEARANCES FOR NON-DIRECT VENT INSTALLATIONS IN THE USA AND CANADA

Details clearances for vent terminations in non-direct vent installations by region.

Direct Vent Termination Clearances

VENT TERMINATION CLEARANCES FOR DIRECT VENT INSTALLATIONS IN THE USA AND CANADA

Details clearances for vent terminations in direct vent installations by region.

Direct Vent Piping Terminations

Details of Intake and Exhaust Piping Terminations for Direct Vent Installations

Explains routing and termination of intake and exhaust pipes for direct vent systems.

EXHAUST PIPE TERMINATION SIZE REDUCTION

DIRECT VENT ROOF TERMINATION KIT

FIELD SUPPLIED WALL TERMINATION

DIRECT VENT CONCENTRIC WALL TERMINATION

DIRECT VENT APPLICATION USING EXISTING CHIMNEY

OPTIONAL VENT TERMINATION FOR MULTIPLE UNIT INSTALLATION OF DIRECT VENT WALL TERMINATION

Non-Direct Vent Exhaust Piping

Details of Exhaust Piping Terminations for Non-Direct Vent Applications

Explains routing and termination of exhaust pipes for non-direct vent systems.

Condensate Drainage System

Condensate Piping

Procedures for installing and priming the condensate trap and routing drain lines.

CONDENSATE TRAP LOCATIONS (Unit shown in upflow position with remote trap)

CONDENSATE TRAP LOCATIONS (Unit shown in horizontal right hand discharge position)

Gas Piping Installation

Gas Piping

General instructions and safety precautions for gas piping installation.

Leak Check

Procedures for checking gas piping for leaks after installation.

GAS PIPE CAPACITY - FT³/HR (kL/HR)

Electrical System Installation

ELECTROSTATIC DISCHARGE (ESD) Precautions and Procedures

Precautions to protect electronic components from electrostatic discharge.

INTERIOR MAKE-UP BOX INSTALLATION

TYPICAL FIELD WIRING DIAGRAM

TYPICAL WIRING DIAGRAM

Integrated Control System

INTEGRATED CONTROL (Automatic Hot Surface Ignition System)

Description of the integrated control system and its features.

Furnace Unit Start-Up

Unit Start-Up

Safety precautions and procedures for starting up the furnace.

Gas Valve Operation

Failure To Operate

Heating Sequence Of Operation

Gas Pressure and Altitude Adjustments

Gas Pressure Adjustment

Procedures for adjusting gas pressure and flow rates for proper operation.

High Altitude Information

Guidance for installing and adjusting the furnace at higher altitudes.

Venting and Combustion Air Testing

Testing for Proper Venting and Sufficient Combustion Air for Non-Direct Vent Applications

Procedures to test venting and combustion air supply in non-direct vent setups.

Service and Maintenance Procedures

Winterizing and Condensate Trap Care

Cleaning Heat Exchanger

Cleaning the Burner Assembly

Annual Planned Service

PLANNED SERVICE

Items to check during annual furnace inspections for safety and operation.

FAILURE CODES

Start-Up and Performance Checklist

Start-Up & Performance Check List

A checklist for verifying proper installation and initial unit setup.

Unit Operation Modes

Heating Mode

Cooling Mode

Massachusetts Installation Requirements

Modifications to NFPA-54, Chapter 10

Specific installation requirements for Massachusetts, including CO detectors and signage.