bryant plus 80 gas furnace manual

The Bryant Plus 80 Gas Furnace is a high-efficiency heating system with AFUE ratings up to 80%, featuring a durable heat exchanger, electronic ignition, variable-speed blower motor, multi-speed operation, and compatibility with various thermostat systems. Designed for residential use with natural gas or propane, it includes safety features like flame rollout switch, pressure switch, and limit controls. Below are key sections for safety, features, installation, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting Thermostat 7. Operating the Furnace 8. Safety Features 9. Maintenance & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Durable heat exchanger, electronic ignition system, variable-speed blower motor, multi-speed operation, gas valve, flame sensor, pressure switch, limit controls.

Feature	Description
Heat Exchanger	Durable construction for efficient heat transfer
Electronic Ignition	Reliable spark ignition system
Variable-Speed Blower	Adjustable airflow for comfort and efficiency
Multi-Speed Operation	Multiple fan speeds for optimal performance
Gas Valve	Precise gas flow control
Flame Sensor	Safety feature to detect flame presence
Pressure Switch	Ensures proper venting operation
Limit Controls	Prevents overheating
Flame Rollout Switch	Additional safety protection
Thermostat Compatibility	Works with most standard thermostats

Installation

Unpack and inspect all components. Ensure proper location with adequate clearance.

Position furnace: Place on stable, level surface with proper clearances as specified.
Connect gas supply: Use approved gas piping and fittings; pressure test for leaks.
Connect electrical: Follow local codes; proper grounding required.
Connect venting: Use approved vent materials; ensure proper slope and termination.
Connect thermostat: Use appropriate wiring for system compatibility.

WARNING! Installation must be performed by qualified HVAC technician. Gas leaks can cause explosion or fire.

First-Time Setup

After installation, perform initial startup procedure.

Verify all connections: Gas, electrical, venting, and thermostat.
Check gas pressure: Adjust if necessary per specifications.
Set blower speeds: Configure for specific application requirements.
Test operation: Start furnace and verify proper ignition sequence.
Check safety controls: Verify all safety switches function correctly.

CAUTION! Never bypass safety controls. Always follow proper startup procedure.

Specifications

AFUE Rating: Up to 80%
Fuel Type: Natural Gas or Propane
Input BTU/H: Various models from 40,000 to 120,000 BTU
Blower Motor: Variable-speed, multi-speed operation
Ignition System: Electronic direct spark
Venting: Category I, atmospheric venting
Electrical: 115V, 60Hz
Dimensions: Varies by model
Warranty: Limited lifetime heat exchanger warranty

Controls and Settings

Integrated control board with LED status lights. Access via control panel cover.

Control Board: Monitors system operation, displays error codes, manages safety controls.

Blower Speeds: Configurable for heating and continuous fan operation. Gas Pressure: Field adjustable per installation requirements. Thermostat Settings: Compatible with most 24VAC thermostats. Error Codes: LED flash patterns indicate specific issues for troubleshooting.

Connecting Thermostat

Standard 24VAC thermostat connection with R, W, G, C terminals.

Turn off power to furnace at disconnect switch.
Remove control panel to access thermostat terminals.
Connect thermostat wires to appropriate terminals.
Restore power and test thermostat operation.

Tip: Use proper gauge thermostat wire and follow color coding standards.

Operating the Furnace

Normal operation controlled by thermostat settings.

Set thermostat to desired temperature above current room temperature.
Furnace will initiate startup sequence: inducer motor, pressure switch verification, ignition, flame establishment.
Blower will start after warm-up period.
When thermostat satisfied, gas valve closes, blower continues for cool-down.
For continuous fan operation, set thermostat to "FAN ON" position.

WARNING! Never operate furnace with access panels removed. Keep combustible materials away from furnace.

Safety Features

Multiple safety systems: Flame rollout switch, pressure switch, high limit control, flame sensor, gas valve safety shutoff.

Maintenance & Cleaning

Annual maintenance required by qualified technician. Regular filter changes needed.

CAUTION! Turn off power and gas supply before servicing. Only qualified personnel should perform internal maintenance.

Regulatory Information

UL listed, ANSI standards compliant. Meets all applicable safety standards for gas-fired furnaces. Manufactured to strict quality standards. For technical support, contact Bryant Heating & Cooling at 1-800-BRYANT-1 or visit www.bryant.com.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Furnace won't start	Power, thermostat, safety lockout	Check power supply; verify thermostat settings; reset if locked out.
No heat	Gas supply, ignition, safety switches	Verify gas valve on; check for ignition; inspect safety controls.
Blower not running	Motor, capacitor, control board	Check blower motor; test capacitor; verify control board signals.
Short cycling	Filter, limit switch, venting	Replace dirty filter; check limit switch; verify proper venting.
Unusual noises	Blower, inducer, heat exchanger	Inspect blower wheel; check inducer motor; examine heat exchanger.

Reset: Turn power off for 30 seconds to reset control board.

Service: 1-800-BRYANT-1; www.bryant.com