AirQuest Furnace Owners Manual

The AirQuest Furnace is a high-efficiency residential heating system designed for reliable performance and energy savings. This furnace features variable-speed blower technology, electronic ignition, multiple heat stages, advanced diagnostic controls, and compatibility with various thermostat systems. Below are key sections for safety, features, installation, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Variable-speed blower motor, electronic ignition system, multi-position installation capability, diagnostic LED lights, filter access panel, gas valve, heat exchanger, and pressure switches.

Installation Requirements

Professional installation required. Ensure proper clearances and ventilation.

1. Location selection: Choose area with adequate combustion air and service access.
2. Venting: Install proper vent pipes according to local codes and manufacturer specifications.
3. Gas connection: Use approved pipe and fittings; pressure test for leaks.
4. Electrical: Connect to dedicated 120V circuit with proper grounding.
5. Thermostat: Install compatible thermostat according to wiring diagram.

WARNING! Installation must be performed by qualified HVAC technician. Improper installation can cause fire, explosion, or carbon monoxide poisoning.

First-Time Setup

Initial startup must be performed by qualified technician.

1. System check: Verify all connections, clearances, and venting are correct.
2. Gas pressure: Adjust gas valve to specified manifold pressure.
3. Combustion analysis: Test and adjust for proper combustion efficiency.
4. Airflow: Set blower speeds for heating operation.
5. Thermostat programming: Set temperature ranges and schedule if programmable.

CAUTION! Do not attempt first-time startup without proper training and equipment.

Technical Specifications

• Heating Capacity: 40,000 - 120,000 BTU/H (varies by model)
• AFUE Rating: Up to 96% efficiency
• Electrical Requirements: 120V, 60Hz, 15 Amp circuit
• Gas Type: Natural gas or LP (conversion kit required)
• Gas Pressure: Natural gas: 3.5" W.C.; LP: 10" W.C.
• Blower Motor: Variable-speed ECM
• Sound Rating: Ultra-quiet operation
• Warranty: Limited lifetime heat exchanger, 10 years parts
• Operating Temp Range: -30°F to 120°F ambient

Controls and Settings

Integrated control board with diagnostic capabilities. Access via control panel or thermostat.

Control Board: POWER switch, Diagnostic LED, DIP switches for configuration.

Thermostat Settings: HEAT/COOL/OFF mode, Temperature setpoint, Fan AUTO/ON, Program schedules. Control Board: Blower speed settings, Timing adjustments, LED error code display. Safety: Limit switches, Pressure switches, Rollout switches, Ignition control.

System Operation

Automatic operation controlled by thermostat. Manual override available at unit.

1. Call for heat: Thermostat signals furnace to begin heating cycle.
2. Inducer motor: Starts to establish draft through heat exchanger.
3. Pressure switch: Verifies proper draft before ignition.
4. Ignition: Hot surface igniter or spark ignition lights burners.
5. Flame sensor: Confirms burner ignition.
6. Blower operation: Delays then starts to distribute heated air.
7. Cycle completion: Shuts down in reverse sequence when thermostat satisfied.

Tip: Allow system to complete full cycles; frequent cycling reduces efficiency.

Maintenance Procedures

Regular maintenance ensures optimal performance and safety.

1. Monthly: Check and replace air filter if dirty.
2. Seasonal: Inspect vent system for obstructions.
3. Annual: Professional inspection and cleaning recommended.
4. Burner inspection: Clean burners and check flame pattern.
5. Heat exchanger: Visual inspection for cracks or damage.
6. Blower assembly: Clean blower wheel and housing.
7. Drain system: Clear condensate drain lines and trap.

WARNING! Turn off power and gas supply before performing any maintenance.

Safety Features

Multiple safety devices protect against hazardous conditions. Flame rollout switch: Detects burner flame outside combustion area. High limit switch: Prevents overheating by shutting off burners. Pressure switches: Ensure proper venting before ignition. Ignition control: Monitors flame and controls ignition sequence.

Care & Cleaning

Keep area around furnace clear of combustible materials. Clean exterior with damp cloth only.

CAUTION! Do not use water or cleaning solutions on electrical components. Keep filter clean for proper airflow.

Regulatory Information

UL certified for safety standards. ANSI Z21.47 compliant for gas-fired central furnaces. Meets DOE energy efficiency requirements. For support, visit www.airquest.com or contact 1-800-555-HEAT. Copyright © 2025 AirQuest HVAC Systems. All rights reserved.

Troubleshooting

Reset: Turn power off for 30 seconds then restore.

Service: 1-800-555-HEAT; www.airquest.com