Armstrong Air Tech Furnace Manual

The Armstrong Air Tech Furnace is a high-efficiency gas furnace designed for residential heating applications. This manual covers installation, operation, maintenance, and troubleshooting for various Armstrong Air Tech furnace models. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting Components 7. Operating Procedures 8. Maintenance Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: High-efficiency heat exchanger, Electronic ignition system, Multi-speed blower motor, Electronic thermostat interface, Safety shut-off controls, Filter access panel.

Feature	Description
Heat Exchanger	Stainless steel construction for maximum efficiency
Ignition System	Electronic hot surface ignition
Blower Motor	Multi-speed ECM motor for optimal airflow
Thermostat Interface	Compatible with standard 24V thermostats
Safety Controls	Automatic shut-off for overheat protection
Filter Access	Easy-access panel for filter replacement
Gas Valve	Modulating gas valve for precise temperature control
Pressure Switch	Ensures proper venting operation
Flame Sensor	Monitors burner operation
Limit Switch	Prevents overheating conditions

Installation

Unpack and inspect contents. Ensure proper location and clearances.

Position furnace: Place on stable, level surface with proper clearances.
Connect gas supply: Use approved gas piping and fittings.
Connect electrical: Follow local electrical codes for power connection.
Connect thermostat: Use 18-gauge thermostat wire.
Connect venting: Install proper vent pipes according to code.
Connect air ducts: Ensure proper ductwork connections.

WARNING! Installation must be performed by qualified HVAC technician. Gas furnaces can be dangerous if improperly installed.

First-Time Setup

Power on furnace; follow startup sequence.

Verify gas supply: Ensure gas valve is open and connections are tight.
Check electrical: Verify proper voltage at unit.
Set thermostat: Program desired temperature settings.
Test operation: Initiate heating cycle and verify proper operation.
Check airflow: Ensure proper airflow through all registers.
Verify venting: Confirm proper draft and vent operation.

CAUTION! Never bypass safety controls. Ensure proper combustion air supply.

Specifications

Heating Capacity: 40,000 - 120,000 BTU/h depending on model
Efficiency: 80% - 96% AFUE
Gas Type: Natural gas or propane (model specific)
Electrical: 120V AC, 60Hz
Blower Speeds: Multiple speeds for heating and cooling modes
Venting: Category I or IV depending on efficiency rating
Dimensions: Varies by model (typically 21"W x 21"D x 56"H)
Operating Temp: Standard indoor installation temperatures
Warranty: Limited lifetime heat exchanger warranty

Controls and Settings

Access control board via front panel. Thermostat controls heating operation.

Control Board: LED status lights, DIP switch settings, Reset button, Diagnostic codes.

Temperature: Set via thermostat. Fan Control: AUTO/ON settings. Blower Speed: Adjustable for heating and cooling modes. Safety Controls: Automatic high-limit protection, pressure switch monitoring, flame rollout protection. Diagnostic: LED flash codes for troubleshooting.

Connecting Components

Gas supply: Black iron pipe with sediment trap. Electrical: Dedicated circuit. Thermostat: 24V connection. Venting: PVC or metal depending on model.

Turn off power and gas before connecting components.
Match connections to proper terminals (R, W, G, Y, C).
Verify proper gas pressure at manifold.
Check vent pipe slope and connections.

Tip: Always use pipe compound on gas connections and check for leaks with soap solution.

Operating Procedures

Standard heating operation with automatic cycling.

Set thermostat: Adjust to desired temperature above room temp.
Startup sequence: Thermostat calls for heat, inducer motor starts, pressure switch closes, ignition sequence begins.
Heating cycle: Gas valve opens, burner ignites, blower starts after heat exchanger warms.
Shutdown: Thermostat satisfied, gas valve closes, blower continues until heat exchanger cools.
Fan operation: AUTO mode runs with heat cycle, ON mode runs continuously.

WARNING! Never operate without proper venting. Carbon monoxide hazard exists with improper operation.

Maintenance Features

Filter Replacement: Monthly inspection recommended. Annual Service: Professional cleaning and inspection required. Diagnostic Codes: LED flash patterns indicate specific issues.

Care & Cleaning

Turn off power before maintenance. Replace filters regularly. Keep area around furnace clear.

CAUTION! Do not attempt to clean heat exchanger or burners. Professional service required for internal components.

Regulatory Information

ANSI Z21.47: Certified for gas furnace safety standards. UL Listed: Electrical components certified. For support, visit www.armstrongair.com or contact 1-800-448-5872. Installation must comply with local building codes and manufacturer specifications.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Furnace won't start	Power/thermostat	Check circuit breaker; verify thermostat settings; check door switch.
No heat	Gas supply/ignition	Verify gas valve open; check for ignition failure; inspect flame sensor.
Short cycling	Filter/airflow	Replace dirty filter; check for blocked vents; verify proper airflow.
Blower won't stop	Thermostat/fan limit	Check thermostat fan setting; inspect fan limit control.
Unusual noises	Mechanical issues	Inspect blower wheel; check for loose components; verify motor condition.

Reset: Power cycle unit if lockout occurs.

Service: 1-800-448-5872; www.armstrongair.com