Whirlpool Gas Furnace Manuals

The Whirlpool Gas Furnace is a high-efficiency heating system designed for residential use, featuring advanced combustion technology, multiple safety systems, electronic ignition, variable-speed blower motor, and compatibility with standard thermostats. Available in various BTU capacities with AFUE ratings up to 96%. Below are key sections for safety, features, installation, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Gas valve assembly, heat exchanger, blower motor, electronic control board, pressure switches, flame sensor, igniter, and safety switches.

Installation Requirements

Professional installation required. Verify local codes and obtain permits.

1. Location: Install in approved spaces with proper clearances and combustion air.
2. Gas connection: Use black iron pipe with proper sizing; pressure test required.
3. Electrical: 120V AC dedicated circuit; proper grounding essential.
4. Venting: Category IV PVC venting for high-efficiency models.
5. Ductwork: Properly sized and sealed return and supply ducts.

WARNING! Gas furnaces produce carbon monoxide; improper installation can be fatal. Use only certified HVAC technicians.

First-Time Setup

Initial startup must be performed by qualified technician.

1. Verify all connections: Gas, electrical, venting, and ductwork.
2. Check gas pressure: Adjust manifold pressure per specifications.
3. Test safety controls: Verify limit switches, pressure switches, flame sensor.
4. Program thermostat: Set heating schedule and temperature limits.
5. Commission system: Run through complete heating cycle and verify operation.

CAUTION! Never attempt initial startup without proper training and equipment.

Technical Specifications

• Input Capacity: 40,000 - 120,000 BTU/hr models available
• AFUE Rating: Up to 96% efficiency
• Gas Type: Natural gas or LP (conversion kit required)
• Electrical: 120V AC, 60Hz, 15 amp circuit
• Static Pressure: 0.2 - 0.8 inches water column
• Venting: Category I (conventional) or Category IV (direct vent)
• Sound Level: Less than 70 dBA at 3 feet
• Warranty: 20-year heat exchanger, 5-year parts
• Operating Temp Range: -30°F to 120°F ambient

Controls and Settings

Integrated control board with LED status lights. Access via control panel or thermostat.

Control Board LEDs: Power (green), Heat (yellow), Error (red blinking codes).

Thermostat Settings: Heat/Off/Auto, Fan On/Auto, Temperature setpoints. Advanced Features: Multi-stage heating, smart thermostat compatibility, vacation mode, filter change reminder. Service Settings: Dip switches for blower speeds, gas type, altitude adjustment.

Venting and Ductwork

Proper venting critical for safety and efficiency.

1. Vent sizing: Follow manufacturer specifications for pipe diameter and length.
2. Clearances: Maintain required distances from combustible materials.
3. Termination: Proper outdoor location away from windows and air intakes.
4. Duct sizing: Calculate CFM requirements for each room.
5. Airflow: Verify 400 CFM per 12,000 BTU minimum.

Tip: Have duct system professionally balanced for optimal performance.

Operation Instructions

Normal heating cycle operation.

1. Call for heat: Thermostat signals furnace to start.
2. Prepurging: Blower clears combustion chamber (30-60 seconds).
3. Ignition sequence: Hot surface igniter glows, gas valve opens.
4. Flame verification: Flame sensor confirms ignition.
5. Main heating: Burners operate, heat exchanger warms.
6. Blower activation: Circulates warm air through ducts.
7. Cycle completion: Thermostat satisfied, burners shut off.
8. Postpurge: Blower continues to dissipate residual heat.

WARNING! Never block return or supply vents; maintain clear airflow paths.

Safety Features

Multiple redundant safety systems: Flame rollout switches, high limit switches, pressure switches, flame sensor, igniter safety lockout. Carbon monoxide detection recommended in living spaces.

Maintenance & Cleaning

Annual professional maintenance required. Monthly filter changes during heating season.

1. Filter replacement: Use proper size and MERV rating.
2. Burner inspection: Clean and verify proper flame pattern.
3. Heat exchanger: Visual inspection for cracks or corrosion.
4. Blower cleaning: Remove dust and debris from motor and wheel.
5. Drain system: Clear condensate lines and traps.

CAUTION! Turn off power and gas supply before any maintenance. Use only qualified technicians.

Regulatory Information

ANSI Z21.47/CSA 2.3: Certified for safety standards. UL listed. Meets DOE efficiency requirements. For natural gas models: Maximum input pressure 14" W.C., minimum 5" W.C. For LP gas: Maximum input pressure 14" W.C., minimum 11" W.C. Copyright © Whirlpool Corporation. For support, visit www.whirlpool.com or contact 1-800-253-1301.

Troubleshooting

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

Service: 1-800-253-1301; www.whirlpool.com