Coleman Furnace Owners Manual

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

Features at a Glance

Key components: Heat exchanger, burners, blower assembly, gas valve, pressure switches, limit controls, venting system.

Installation

Unpack and inspect all components. Ensure proper location and clearances.

1. Position furnace: Place on solid, level surface with proper clearances to combustibles.
2. Connect gas supply: Use black iron pipe with proper thread sealant.
3. Install venting: Follow manufacturer specifications for PVC pipe sizing and routing.
4. Connect electrical: 120V AC power supply with proper grounding.
5. Install thermostat: Connect low-voltage wiring to control board.
6. Connect ductwork: Ensure proper sealing and insulation.

WARNING! Installation must be performed by qualified HVAC technician. Gas connections require leak testing.

First-Time Setup

Complete installation checks before initial startup.

1. Verify gas connections: Pressure test all joints for leaks.
2. Check electrical: Ensure proper voltage and grounding.
3. Inspect venting: Confirm proper slope and termination clearances.
4. Install air filter: Insert proper size filter in filter rack.
5. Set thermostat: Program desired temperature settings.
6. Startup sequence: Follow manufacturer's startup procedure.

CAUTION! Never bypass safety controls. Ensure proper combustion air supply.

Specifications

• Heating Capacity: 40,000 - 120,000 BTU/H
• Efficiency: 80% - 98% AFUE depending on model
• Gas Type: Natural gas or LP (conversion kit required)
• Electrical: 120V AC, 60Hz, 15 amp circuit
• Blower Motor: Variable-speed ECM
• Venting: PVC, CPVC, or ABS pipe (2" - 3" diameter)
• Dimensions: Varies by model (typical: 21"W x 21"D x 48"H)
• Weight: 80 - 150 lbs depending on model
• Warranty: 20-year heat exchanger, 5-year parts

Controls and Settings

Access control board via front panel. Status lights indicate system operation.

Control Board: LED status lights, dip switch settings, diagnostic codes.

Temperature: Set via thermostat (heat/cool/auto modes). Blower: Adjust speed taps for heating/cooling. Limit Controls: Factory set, do not adjust. Gas Pressure: Adjust at gas valve (qualified technician only). Diagnostic Codes: Flash patterns indicate specific faults.

Connecting Thermostat

Standard 24V thermostat wiring with R, W, Y, G, C terminals.

1. Turn off power to furnace at disconnect switch.
2. Remove thermostat cover and label existing wires.
3. Connect wires to control board terminals: R (24V), W (heat), G (fan), C (common).
4. For AC: Connect Y (cooling) terminal.
5. Secure connections and replace covers.
6. Restore power and test operation.

Tip: Use color-coded thermostat wire for easy identification.

Operating Procedures

Normal heating cycle operation and settings.

1. Set thermostat to desired temperature above room temperature.
2. Furnace will initiate startup sequence: inducer motor, pressure switch check, igniter glow, gas valve opening.
3. Once flame is established, blower will start after heat exchanger warms up.
4. When thermostat is satisfied, gas valve closes, blower continues until cool-down period.
5. For continuous fan operation, set thermostat to "ON" instead of "AUTO".

WARNING! Never operate furnace without filter. Keep vents and returns unobstructed.

Safety Features

Multiple safety systems protect against hazardous conditions.

Maintenance & Cleaning

Regular maintenance ensures optimal performance and longevity.

1. Monthly: Check and replace air filter as needed.
2. Annual: Professional inspection and cleaning.
3. Clean burners and heat exchanger (qualified technician).
4. Check vent system for obstructions.
5. Lubricate blower motor if required (most are sealed).
6. Inspect electrical connections and gas valve.

CAUTION! Turn off power and gas supply before any maintenance. Only qualified technicians should service gas components.

Regulatory Information

UL listed and ANSI certified for safety standards. Complies with Department of Energy efficiency requirements. Natural gas models certified for use with ANSI Z21.47. For technical support, contact Coleman HVAC at 1-800-426-5362 or visit www.colemanac.com. Keep this manual for future reference.

Troubleshooting

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

Service: 1-800-426-5362; www.colemanac.com