American Standard GVF Furnace Manual

The American Standard GVF Furnace is a high-efficiency gas furnace designed for residential heating applications. This multi-speed furnace features advanced combustion technology, durable heat exchanger construction, electronic ignition, variable-speed blower motor, integrated diagnostic controls, and compatibility with various thermostat systems. 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. Operating Procedures 8. Maintenance Schedule 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Durable aluminized steel heat exchanger, multi-speed ECM blower motor, electronic hot surface ignition, integrated control board, pressure switches, flame sensor, and diagnostic LED indicators.

Feature	Description
Heat Exchanger	Aluminized steel construction for durability and efficiency
Blower Motor	Variable-speed ECM motor for quiet operation
Ignition System	Electronic hot surface ignition
Control Board	Integrated diagnostic and safety controls
Gas Valve	Precise gas flow regulation
Pressure Switches	Safety verification of venting operation
Flame Sensor	Monitors burner flame presence
Diagnostic LED	Flashing codes for troubleshooting
Filter Rack	Standard 1-inch or 4-inch media filter compatible
Venting	PVC pipe compatible for sidewall or roof venting

Installation

Unpack and inspect contents. Position furnace in approved location.

Gas line connection: Use black iron pipe with proper thread sealant.
Electrical connection: Connect 120V power supply with proper grounding.
Venting installation: Install PVC vent pipes according to local codes.
Ductwork connection: Secure supply and return air ducts properly.
Condensate drain: Connect PVC drain line with proper slope.

WARNING! Gas furnaces produce carbon monoxide; ensure proper venting. Installation must comply with local codes and be performed by qualified technician.

First-Time Setup

Power on furnace; follow startup sequence.

Gas pressure check: Verify inlet and manifold pressures are correct.
Blower speed settings: Adjust dip switches for proper airflow.
Thermostat configuration: Connect compatible thermostat wires.
System testing: Run through complete heating cycle.
Safety checks: Verify proper ignition and flame rollout operation.

CAUTION! Never bypass safety controls. Ensure combustion air supply is adequate.

Specifications

Input Capacity: 40,000 - 120,000 BTU/h (varies by model)
AFUE Rating: Up to 96% efficiency
Gas Type: Natural gas (LP conversion kit available)
Electrical: 120V AC, 60Hz, 15 amp circuit
Blower Motor: Variable-speed ECM
Static Pressure: 0.1 - 0.8 inches WC maximum
Venting: 2-inch PVC pipe required
Operating Temp Range: -30°F to 150°F ambient
Warranty: Limited lifetime heat exchanger warranty

Controls and Settings

Access control board via front panel removal. Integrated control board with diagnostic LED.

Thermostat Connections: R (24V power), W (heat), G (fan), C (common), Y (cooling if applicable)

Blower Speed Settings: Adjust dip switches for heating and cooling CFM requirements. Gas Pressure: Factory set, verify during installation. Temperature Rise: Adjust blower speed to achieve 35-65°F temperature rise. Diagnostic Codes: LED flash patterns indicate specific fault conditions.

Connecting Thermostat

Compatible with most 24V thermostats. 2-stage heating capable with proper thermostat.

Turn off power to furnace before wiring.
Match thermostat wires to control board terminals.
Use 18-gauge thermostat wire for connections.
Program thermostat for proper system operation.

Tip: For optimal efficiency, use programmable or smart thermostat.

Operating Procedures

Normal heating operation sequence:

Thermostat calls for heat sending 24V to W terminal.
Inducer motor starts and pressure switch closes.
Hot surface igniter glows for 17-30 seconds.
Gas valve opens and burner ignites.
Flame sensor confirms ignition within 4 seconds.
Blower motor starts after 30-90 second delay.
System runs until thermostat satisfied.
Gas valve closes, inducer runs 30-60 second post-purge.
Blower continues for 90-180 second cool-down.

WARNING! Never operate furnace without filter. Ensure vents are unobstructed.

Maintenance Schedule

Monthly: Check and replace air filter as needed. Annual: Professional inspection and cleaning.

Professional maintenance should include: Heat exchanger inspection, burner cleaning, flame sensor cleaning, blower motor inspection, electrical connection check, gas pressure verification, safety control testing, and condensate system cleaning.

Care & Cleaning

Turn off power before servicing. Use soft brush and vacuum for cleaning.

CAUTION! Do not use water or liquid cleaners on electrical components. Keep combustion air intake clear of debris.

Regulatory Information

UL certified for safety. ANSI Z21.47 compliant. Meets DOE energy efficiency standards. Manufactured to comply with U.S. safety and performance requirements. For technical support, contact American Standard at 1-800-428-4323 or visit www.americanstandardair.com.

Troubleshooting

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

Reset: Turn power off for 30 seconds then restore. Check diagnostic LED for fault codes.

Service: 1-800-428-4323; www.americanstandardair.com