Bryant Plus 80 Furnace Manual

The Bryant Plus 80 Furnace is a high-efficiency gas furnace with 80% AFUE rating, featuring single-stage operation, durable heat exchanger, electronic ignition, variable-speed blower motor, built-in diagnostic system, safety controls, and compatibility with standard thermostat systems. Designed for residential heating applications with natural gas or propane capability. Below are key sections for safety, features, installation, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Durable aluminized steel heat exchanger, hot surface ignition, induced draft blower, variable-speed ECM blower motor, integrated control board, pressure switches, flame sensor, and diagnostic LED.

Installation Requirements

Professional installation recommended. Verify local codes and obtain permits.

1. Location: Install in dry, clean area with adequate clearance for service.
2. Venting: Properly size and install PVC vent pipes according to manual specifications.
3. Gas Connection: Use approved gas pipe and fittings; pressure test for leaks.
4. Electrical: Connect to 120V AC power with proper grounding.
5. Thermostat: Install compatible 24V thermostat with appropriate wiring.

WARNING! Gas appliances can be hazardous; installation must comply with all local codes and regulations. Use qualified HVAC technician.

First-Time Setup

After installation, perform initial startup procedure.

1. Verify all connections: Gas, electrical, venting, and thermostat.
2. Check gas pressure: Adjust if necessary per specifications.
3. Set thermostat: Place in heating mode with temperature above room temp.
4. Start furnace: Observe ignition sequence and verify proper operation.
5. Check airflow: Verify proper airflow through registers.
6. Test safety controls: Verify limit switches and pressure switches function.

CAUTION! Never bypass safety controls. Ensure proper combustion air and ventilation.

Technical Specifications

• AFUE Rating: 80% Annual Fuel Utilization Efficiency
• Input Capacity: 40,000 to 120,000 BTU/hr (model dependent)
• Gas Type: Natural gas or propane (conversion kit required)
• Electrical: 120V AC, 60Hz, 5-8 amps
• Blower Motor: Variable-speed ECM
• Venting: PVC pipe (2" or 3" depending on model)
• Static Pressure: 0.1 to 0.9 inches water column
• Operating Temp Rise: 35°F to 65°F
• Sound Rating: Ultra-quiet operation
• Warranty: 20-year heat exchanger, 5-year parts

Controls and Operation

Integrated control board manages all furnace functions with LED status indicator.

Normal Operation Sequence: Thermostat call for heat → Inducer motor starts → Pressure switch proves draft → Hot surface ignition → Gas valve opens → Flame established → Blower starts after heat exchanger warm-up

Control Board LED Codes: Steady on = normal operation; Slow flash = normal standby; Rapid flash = fault condition (refer to fault code chart)

Thermostat Settings: Compatible with most 24V thermostats; programmable thermostats recommended for efficiency.

Venting and Combustion Air

Proper venting critical for safe operation and efficiency.

1. Vent Pipe: Use only approved PVC pipe; maintain proper slope away from furnace.
2. Termination: Locate vent terminal away from windows, doors, and air intakes.
3. Combustion Air: Ensure adequate fresh air supply for proper combustion.
4. Clearances: Maintain required clearances to combustible materials.

Tip: Regularly inspect vent pipes for obstructions or damage.

Maintenance Procedures

Regular maintenance ensures efficiency and longevity.

1. Monthly: Check and replace air filter if dirty.
2. Annual Professional Service: Comprehensive inspection and cleaning.
3. Burner Inspection: Clean burners and verify proper flame pattern.
4. Heat Exchanger: Inspect for cracks or corrosion.
5. Blower Assembly: Clean blower wheel and housing.
6. Drain System: Clear condensate drain lines and trap.
7. Electrical: Check all connections and component operation.
8. Venting: Inspect vent pipes and terminations.

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

Safety Features

Multiple safety systems protect against hazardous conditions.

Care & Cleaning

Keep furnace area clean and unobstructed.

Monthly: Replace air filter to maintain airflow and efficiency.

Seasonal: Clean around furnace; remove dust and debris.

Annual: Professional cleaning of burners, heat exchanger, and blower assembly.

CAUTION! Never operate without filter. Keep combustible materials away from furnace.

Regulatory Information

UL listed and ANSI certified. Complies with ASHRAE standards. Manufactured to meet or exceed industry safety standards. Natural gas models certified for use in United States and Canada. For technical support or warranty service, contact Bryant Customer Service at 1-800-428-4326 or visit www.bryant.com.

Troubleshooting

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

Service: 1-800-428-4326; www.bryant.com