Armstrong Air Enhanced Furnace Manual

The Armstrong Air Enhanced Furnace is a high-efficiency residential heating system featuring advanced combustion technology, variable-speed blower motor, electronic ignition, multi-speed operation, diagnostic LED indicators, built-in safety controls, energy-saving modes, and compatibility with standard thermostats. Designed for natural gas or propane operation with AFUE ratings up to 98%. Below are key sections for safety, features, installation, setup, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Heat exchanger, blower assembly, gas valve, ignition system, pressure switches, venting system, air filter, diagnostic board.

Installation Requirements

Professional installation required. Verify local codes and obtain permits.

1. Location: Install in dry, well-ventilated area with proper clearances.
2. Gas Connection: Use approved gas piping; pressure test required.
3. Electrical: 120V AC power with proper grounding.
4. Venting: Install PVC vent pipes according to manufacturer specifications.
5. Drain Line: Connect condensate drain to proper disposal.

WARNING! Gas appliances can be hazardous; installation must be performed by qualified technician. Ensure proper combustion air and ventilation.

Initial Setup & Startup

Professional startup procedure required for warranty validation.

1. Verify installation: Check all connections, clearances, and venting.
2. Gas pressure: Set manifold pressure to specifications on rating plate.
3. Electrical: Connect thermostat and verify wiring.
4. Startup sequence: Follow manufacturer's startup checklist.
5. System check: Verify proper operation through complete heating cycle.

CAUTION! Never bypass safety controls. Carbon monoxide hazard exists with improper installation.

Technical Specifications

• Fuel Type: Natural gas or propane
• AFUE Rating: Up to 98% efficiency
• Input BTU/h: 40,000 - 120,000 (model dependent)
• Electrical: 120V AC, 60Hz, 15A circuit
• Blower Motor: Variable-speed ECM
• Venting: 2" PVC pipe (check model specifications)
• Operating Pressure: Natural gas: 3.5" WC; Propane: 10" WC
• Sound Rating: Ultra-quiet operation
• Warranty: Limited lifetime heat exchanger, 10 years parts

Controls and Operation

Integrated control board manages all furnace functions with diagnostic capabilities.

Control Board: LED status light, dip switches for configuration, terminal strip for thermostat connections.

Operation: Thermostat calls for heat, control board initiates prepurge, igniter heats, gas valve opens, flame sensor confirms ignition, blower starts after heat exchanger warms. Continuous monitoring during operation with automatic shutdown if faults detected.

Thermostat Configuration

Compatible with most 24V thermostats including programmable and smart models.

1. Turn off power to furnace before thermostat installation.
2. Connect wires: R (power), W (heat), G (fan), C (common).
3. Configure thermostat for gas furnace with single-stage operation.
4. Set temperature differential and cycle rates per manufacturer instructions.

Tip: Use programmable thermostat for maximum energy savings.

Maintenance Procedures

Regular maintenance ensures efficiency and longevity.

1. Monthly: Check and replace air filter as needed.
2. Annual: Professional inspection and cleaning required.
3. Visual inspection: Check vent pipes, drain lines, and combustion air.
4. Component check: Blower motor, burners, heat exchanger, safety controls.
5. Performance: Verify gas pressure, temperature rise, and combustion analysis.

WARNING! Only qualified technicians should perform internal maintenance. Electrical shock and burn hazards exist.

Safety Features

Multiple safety systems protect against hazardous conditions.

Care & Service Intervals

Regular professional service maintains efficiency and safety.

Annual Service Includes: Clean burners and heat exchanger, check heat exchanger for cracks, verify gas pressure, inspect vent system, check safety controls, lubricate motor if required, verify temperature rise, combustion analysis.

CAUTION! Never operate furnace without filter. Restricted airflow can damage heat exchanger.

Regulatory Compliance

UL certified and meets ANSI Z21.47 standards for gas-fired central furnaces. Complies with U.S. Department of Energy efficiency standards. Installation must comply with National Fuel Gas Code (NFPA 54) and local building codes. For support, contact Armstrong Air at 1-800-448-5872 or visit www.armstrongair.com.

Troubleshooting Guide

Reset Procedure: Turn power off for 30 seconds, then restore.

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