Coleman Evcon Presidential Furnace Manual

The Coleman Evcon Presidential Furnace is a high-efficiency gas furnace designed for residential heating applications. This manual covers the Presidential series models with features including variable-speed blower motors, electronic ignition systems, multiple heat stages, diagnostic LED indicators, and compatibility with standard thermostat controls. Below are key sections for safety, operation, maintenance, troubleshooting, and technical specifications.

Features at a Glance

Key components: Heat exchanger, blower assembly, gas valve, igniter, flame sensor, pressure switches, diagnostic board.

Installation Requirements

Professional installation recommended. Verify local codes and obtain permits.

1. Location: Install in dry, clean area with proper clearance and ventilation.
2. Gas connection: Use approved pipe and fittings; pressure test for leaks.
3. Electrical: 120V AC power with proper grounding; dedicated circuit recommended.
4. Venting: Properly sized PVC or metal vent pipes according to manufacturer specifications.
5. Drain line: Condensate drain properly routed to drain or pump.

WARNING! Gas appliances can be hazardous; installation must comply with all local codes and regulations. Only qualified technicians should perform installation.

First-Time Setup

Initial startup must be performed by qualified technician.

1. Verify all connections: Gas, electrical, venting, and drain.
2. Check gas pressure: Adjust manifold pressure if necessary.
3. Test safety controls: Verify limit switches, pressure switches, rollout switches.
4. Configure thermostat: Set up heating stages and fan control.
5. Perform combustion analysis: Verify proper venting and efficiency.

CAUTION! Never bypass safety controls. Ensure proper ventilation to prevent carbon monoxide buildup.

Technical Specifications

• Input Capacity: 40,000-120,000 BTU/h (varies by model)
• Efficiency: 80-96% AFUE (depending on model series)
• Gas Type: Natural gas or LP/propane (conversion kit required)
• Electrical: 120V AC, 60Hz, 5-15 amp circuit
• Blower Motor: Variable-speed ECM or PSC motor
• Stages: Single-stage, two-stage, or modulating
• Venting: Category I (natural draft) or Category IV (direct vent)
• Dimensions: Varies by model (typically 21"W x 21"D x 40"H)
• Warranty: Limited lifetime heat exchanger, 5-10 years parts

Controls and Operation

Integrated control board manages all furnace functions with diagnostic capabilities.

Control Board: POWER switch, Diagnostic LED, DIP switches for configuration.

Operation: Thermostat calls for heat > Inducer motor starts > Pressure switch proves > Hot surface igniter glows > Gas valve opens > Flame sensor confirms > Blower starts after heat exchanger warms.

Settings: Blower speed adjustments, heating stages, fan on/off delays, diagnostic modes.

Maintenance Procedures

Regular maintenance ensures optimal performance and safety.

1. Monthly: Check and replace air filter as needed.
2. Annual: Professional inspection and cleaning recommended.
3. Seasonal: Verify thermostat operation and clear vents/registers.
4. As needed: Clean flame sensor, check drain lines, inspect heat exchanger.

Tip: Keep area around furnace clear of combustible materials and maintain proper airflow.

Thermostat Configuration

Compatible with standard 24V thermostats; advanced models support multi-stage and variable-speed controls.

1. Wiring: Connect R, W, G, C terminals according to thermostat instructions.
2. Staging: Configure heat stages for optimal comfort and efficiency.
3. Fan control: Set continuous fan or auto operation.
4. Programming: Set schedules for energy savings.

WARNING! Always turn off power before working on thermostat wiring.

Safety Features

Multiple safety systems protect against hazardous conditions.

Cleaning & Maintenance

Regular cleaning maintains efficiency and extends equipment life.

1. Air filter: Replace every 1-3 months depending on usage
2. Blower assembly: Vacuum annually; clean blower wheel if accessible
3. Burners: Professional cleaning recommended every 2-3 years
4. Heat exchanger: Visual inspection annually for cracks or damage
5. Drain system: Flush condensate lines annually

CAUTION! Always disconnect power before servicing. Never operate with access panels removed.

Regulatory Information

ANSI Z21.47: Certified for safety standards. UL listed. Meets DOE efficiency requirements. Manufactured to comply with U.S. safety and performance standards. For technical support, contact Coleman Heating & Air Conditioning at 1-800-426-5362 or visit www.colemanac.com. Serial number and model number located on rating plate inside unit.

Troubleshooting

Diagnostic Codes: Refer to control board LED flash patterns for specific error codes.

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