Conquest 80 Furnace Manual

The Conquest 80 Furnace is a high-efficiency gas furnace with 80% AFUE rating, designed for residential heating applications. This model features electronic ignition, variable-speed blower motor, multiple heating stages, built-in safety controls, and compatibility with standard thermostat systems. Below are key sections for safety, features, installation, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Gas valve assembly, heat exchanger, blower assembly, electronic control board, ignition system, pressure switches, and safety controls.

Installation Requirements

Professional installation required. Ensure proper clearances and local code compliance.

1. Location: Install in approved locations with adequate combustion air and service access.
2. Gas Connection: Use approved pipe dope on male threads only; pressure test for leaks.
3. Electrical: Connect to dedicated 15-amp circuit; proper grounding required.
4. Venting: Install approved vent pipe with proper slope and termination clearances.
5. Ductwork: Ensure proper return and supply air duct sizing and sealing.

WARNING! Gas furnaces produce carbon monoxide; improper installation can be fatal. Installation must comply with all local codes and manufacturer specifications.

First-Time Setup

Initial startup must be performed by qualified technician.

1. Verify installation: Check all connections, clearances, and venting.
2. Gas pressure: Set manifold pressure to specifications on rating plate.
3. Electrical: Verify proper voltage and polarity.
4. Startup sequence: Follow control board LED indicators for proper operation.
5. Commissioning: Check temperature rise, combustion analysis, and safety controls.

CAUTION! Never bypass safety controls. Keep combustion area clear of flammable materials.

Technical Specifications

• Model: Conquest 80
• Input BTU/H: 60,000 to 120,000 (varies by model)
• Output BTU/H: 48,000 to 96,000 (80% of input)
• Gas Type: Natural gas (convertible to LP with kit)
• Electrical: 120V AC, 60Hz, 5 amps maximum
• Static Pressure: 0.1 to 0.5 inches WC maximum
• Temperature Rise: 35°F to 65°F
• Blower Speeds: Multiple tap settings for heating and cooling
• Vent Size: 3" to 5" diameter (varies by model)
• Warranty: 20-year heat exchanger, 5-year parts

Controls and Settings

Integrated control board with diagnostic LED. Thermostat connections: R, C, W, Y, G.

Control Board LED Codes: Steady green = normal operation; Slow flash = pressure switch error; Rapid flash = ignition failure; Off = no power.

Blower Speeds: Adjust heating/cooling speeds via motor taps. Gas Valve: Factory set for natural gas; requires conversion kit for LP. Limit Settings: Factory set high limit control; do not adjust.

Venting and Combustion Air

Category I vent system required. Follow local codes for vent pipe material and clearances.

1. Vent Pipe: Use approved listed vent material; maintain 1/4" per foot upward slope.
2. Termination: Minimum 12 inches from grade; 3 feet from operable windows.
3. Combustion Air: Provide adequate fresh air per local codes and furnace input BTU.
4. Common Venting: Not recommended; consult engineering for multiple appliance venting.

Tip: Install carbon monoxide detectors in sleeping areas when using fuel-burning appliances.

Operation Instructions

Normal operation controlled by thermostat. System includes automatic safety shutdown.

1. Thermostat Setting: Set thermostat to desired temperature; system cycles automatically.
2. Normal Sequence: Call for heat → inducer motor on → pressure switch prove → ignition → gas valve open → flame prove → blower on after delay.
3. Shutdown: Thermostat satisfied → gas valve close → inducer purge → blower off after delay.
4. Safety Shutdown: Automatic shutdown if safety controls activated; requires manual reset.

WARNING! If you smell gas, immediately shut off gas supply, evacuate area, and call gas company from safe location.

Maintenance Procedures

Regular maintenance required for safe and efficient operation.

1. Monthly: Check and replace air filter if dirty.
2. Annual: Professional inspection and cleaning recommended.
3. Blower: Clean blower wheel and housing annually.
4. Heat Exchanger: Visual inspection for cracks or damage during annual service.
5. Venting: Inspect vent system for obstructions or deterioration.

CAUTION! Turn off electrical power and gas supply before performing any maintenance.

Safety Information

Carbon monoxide hazard: Install CO detectors. Keep flammable materials away from furnace. Professional service required for repairs.

Regulatory Compliance

ANSI Z21.47/CSA 2.3: Certified for US and Canada. UL listed. Installation must comply with National Fuel Gas Code NFPA 54, local building codes, and manufacturer instructions. For technical support, contact manufacturer at 1-800-555-HEAT or visit www.conquestfurnace.com.

Troubleshooting Guide

Reset Procedure: Turn thermostat off, turn off power for 30 seconds, restore power, turn thermostat on.

Service: 1-800-555-HEAT; www.conquestfurnace.com