coleman evcon gas furnace manual

The Coleman Evcon Gas Furnace is a high-efficiency heating system designed for residential use, featuring natural gas operation, electronic ignition, variable-speed blower motor, thermal efficiency ratings up to 95% AFUE, built-in safety controls, diagnostic LED indicator, filter monitoring system, and compatibility with standard thermostat controls. 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, igniter, flame sensor, pressure switches, filter compartment, diagnostic board.

Installation Requirements

Professional installation required. Verify local codes and obtain permits.

1. Location: Install in clean, dry area with adequate combustion air and service clearance.
2. Gas connection: Use black iron pipe with pipe joint compound; pressure test required.
3. Electrical: 120V AC, 60Hz dedicated circuit; proper grounding required.
4. Venting: Category IV vent system; follow manufacturer specifications for materials and routing.
5. Ductwork: Properly sized and sealed return and supply ducts.

WARNING! Gas furnaces produce carbon monoxide; improper installation can be lethal. Installation must be performed by qualified technician.

First-Time Setup

After installation, perform initial startup procedure.

1. Verify all connections: Gas, electrical, venting, and ductwork.
2. Check gas pressure: Manifold pressure should be 3.5" WC for natural gas.
3. Set thermostat: Install batteries if required; set to OFF position.
4. Power up: Turn on electrical power and gas supply.
5. Test operation: Set thermostat to HEAT mode above room temperature.
6. Check airflow: Verify proper airflow from all registers.

CAUTION! Never bypass safety controls. If furnace fails to start properly, shut off power and gas immediately.

Technical Specifications

• Input BTU/H: 40,000 to 120,000 (model dependent)
• AFUE Rating: Up to 95%
• Gas Type: Natural gas (may be convertible to LP with kit)
• Electrical: 120V AC, 60Hz, 5-15 amp circuit
• Blower Motor: Variable-speed ECM
• Static Pressure: 0.1 to 0.9 inches WC
• Venting: Category IV (2-pipe system recommended)
• Temperature Rise: 35°F to 65°F
• Dimensions: Varies by model (typically 21"W x 21"D x 45"H)
• Warranty: 20-year heat exchanger, 5-year parts

Controls and Settings

Integrated control board manages all furnace operations with diagnostic capabilities.

Thermostat Settings: HEAT/COOL/OFF, FAN AUTO/ON, temperature setpoint.

Control Board: LED diagnostic indicator (flash codes), DIP switches for blower speeds, pressure switch terminals, gas valve control. Blower Settings: Adjustable delay-on and delay-off timers. Gas Valve: Manual shutoff valve, regulator adjustment. Limit Switches: High temperature limit, rollout switches for safety.

Venting and Ductwork

Proper venting is critical for safe operation and efficiency.

1. Vent materials: Use only manufacturer-approved PVC, CPVC, or ABS for Category IV venting.
2. Vent routing: Maintain proper slope and support; avoid excessive elbows.
3. Clearances: Maintain required clearances to combustible materials.
4. Duct sizing: Follow Manual D calculations for proper airflow.
5. Air filters: Install proper size filter; arrow indicating airflow direction.

Tip: Annual inspection of vent system required to prevent blockages.

Operating Procedures

Normal operation is automatic via thermostat control.

1. Call for heat: Thermostat closes circuit to control board.
2. Prepurging: Blower operates briefly to clear combustion chamber.
3. Ignition sequence: Hot surface igniter glows; gas valve opens.
4. Flame verification: Flame sensor confirms ignition.
5. Main operation: Burners operate; blower starts after heat exchanger warms.
6. Shutdown: Thermostat satisfied; gas valve closes; blower continues for cool-down.

WARNING! Never operate furnace with access panels removed. Carbon monoxide hazard exists.

Maintenance Schedule

Regular maintenance ensures efficiency and longevity.

Safety Features

Multiple safety systems protect against hazardous conditions.

• Flame rollout switches: Shut off gas if flame escapes burners
• High limit switch: Turns off burners if overheating detected
• Pressure switches: Prevent operation if venting blocked
• Flame sensor: Shuts off gas if no flame detected
• Gas valve: Automatic shutoff if electrical power lost
• Door switch: Disables operation when access panel removed

CAUTION! Install carbon monoxide detectors near sleeping areas.

Regulatory Information

ANSI Z21.47/CSA 2.3: Certified for natural gas operation. UL listed. Complies with U.S. Department of Energy efficiency standards. Installation must comply with National Fuel Gas Code (NFPA 54), National Electrical Code (NFPA 70), and local building codes. For technical support, contact Coleman Heating & Air Conditioning at 1-888-263-7540 or visit www.colemanac.com.

Troubleshooting

Reset Procedure: Turn thermostat to OFF, turn off power for 30 seconds, restore power, set thermostat to HEAT.

Service: 1-888-263-7540; www.colemanac.com