Arcoaire Gas Furnace Manual

The Arcoaire Gas Furnace is a high-efficiency heating system designed for residential use, featuring advanced combustion technology, multiple safety systems, variable-speed blower motor, electronic ignition, and compatibility with standard thermostat controls. Below are key sections for safety, features, installation, setup, operation, maintenance, and troubleshooting.

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

Features at a Glance

Key components: Gas valve, heat exchanger, blower assembly, electronic ignition system, pressure switches, flame sensor, limit switches.

Feature	Description
Gas valve	Regulates gas flow to burners
Heat exchanger	Transfers heat from combustion to air
Blower assembly	Circulates heated air through ductwork
Electronic ignition	Replaces standing pilot for efficiency
Pressure switches	Ensures proper venting operation
Flame sensor	Detects burner flame for safety
Limit switches	Prevents overheating
POWER switch	Main power control
PILOT/IGNITION	Ignition system control
THERMOSTAT terminals	Connection points for thermostat wiring

Installation

Unpack and inspect contents. Ensure proper location with adequate clearance.

Gas connection: Use approved gas pipe; apply pipe compound to male threads only.
Vent system: Install according to local codes; maintain proper slope.
Electrical connection: Connect to 120V AC power supply with proper grounding.
Thermostat wiring: Connect R, W, G, C terminals as required.
Ductwork: Ensure proper sizing and sealing.

WARNING! Gas appliances can be dangerous; installation must be performed by qualified technician. Ensure proper ventilation.

First-Time Setup

Power on furnace; follow startup procedure.

Gas pressure check: Verify inlet and manifold pressures.
Vent verification: Ensure proper draft and venting.
Blower speed setting: Adjust for proper airflow.
Thermostat calibration: Set temperature differential.
Test operation: Verify heating cycle and safety controls.

CAUTION! Never bypass safety controls. Test carbon monoxide detectors.

Specifications

Heating Capacity: 40,000 - 120,000 BTU/h range.
Efficiency: 80% - 96% AFUE depending on model.
Gas Type: Natural gas or LP/propane (conversion kit required).
Electrical: 120V AC, 60Hz, 1.5-5.0 amps.
Blower Motor: Variable-speed ECM or PSC motor.
Vent Size: 2" - 4" PVC depending on model.
Dimensions: Varies by model (typical: 21"W x 21"D x 45"H).
Operating Temp Range: -30°F to 120°F ambient.

Controls and Settings

Access control board via front panel. Main controls: POWER switch, GAS VALVE, IGNITION CONTROL.

Control Board: Status LED, diagnostic codes, dip switch settings, terminal connections.

Temperature: Thermostat controlled. Blower: Adjustable delay timers. Safety: Pressure switch settings, limit control, rollout switch. Diagnostic: LED flash codes for troubleshooting. Installation: Dip switches for blower speeds, heating stages, accessory configuration.

Connecting Thermostat

Standard thermostat connections: R (power), W (heat), G (fan), C (common), Y (cooling if equipped).

Turn off power to furnace before wiring.
Strip wires 1/4 inch and connect to appropriate terminals.
Ensure secure connections and proper wire routing.
Program thermostat for heating operation.

Tip: Use 18-gauge thermostat wire for runs under 50 feet.

Operation

Normal heating cycle operation.

Thermostat calls for heat: Sends signal to control board.
Inducer motor starts: Creates draft through heat exchanger.
Pressure switch proves: Verifies proper venting.
Ignition sequence: Hot surface igniter or spark ignition.
Gas valve opens: Fuel flows to burners.
Flame detection: Sensor confirms burner ignition.
Blower starts: Circulates heated air after heat exchanger warms.
Cycle completion: Thermostat satisfied, gas valve closes, blower continues cooling.

WARNING! Never operate with access panels removed. Monitor for unusual noises or odors.

Maintenance

Annual professional maintenance recommended. Regular homeowner maintenance:

Monthly: Check and replace air filter
Seasonal: Inspect vent system for obstructions
Annual: Professional inspection of heat exchanger, burners, safety controls
As needed: Clean flame sensor, check drain system

Care & Cleaning

Turn off power and gas before cleaning. Use soft brush and vacuum for dust removal.

CAUTION! Do not use water or chemical cleaners on electrical components. Keep combustion area clean.

Regulatory Information

ANSI Z21.47: Certified for safety standards. UL listed. Meets Department of Energy efficiency requirements. For natural gas models: ANSI Z21.47/CSA 2.3. For LP gas: ANSI Z21.44/CSA 2.3. Manufactured to comply with U.S. safety and performance standards. For support, contact Arcoaire technical service or authorized dealers.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Furnace won't start	Power/thermostat	Check circuit breaker; verify thermostat setting and batteries.
No heat	Gas supply/ignition	Verify gas valve on; check for ignition lockout; reset if needed.
Short cycling	Filter/limit switch	Replace dirty filter; check for blocked vents or registers.
Blower won't stop	Thermostat/fan switch	Check thermostat fan setting; inspect fan limit control.
Unusual odors	Dust/burning	Normal dust burning off initially; persistent odors require service.
LED error codes	System fault	Refer to diagnostic chart in manual; note flash pattern.

Reset: Power cycle furnace if locked out. Wait 5 minutes between reset attempts.

Service: Contact qualified HVAC technician for all gas and electrical repairs.