Honeywell Gas Furnace Manual

The Honeywell Gas Furnace is a high-efficiency heating system designed for residential use, featuring advanced thermostat controls, multiple safety mechanisms, energy-saving modes, and compatibility with various home automation systems. This manual covers installation procedures, operational guidelines, maintenance schedules, troubleshooting steps, and safety precautions to ensure optimal performance and longevity of your heating system.

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

Features at a Glance

Key components: High-efficiency heat exchanger, Electronic ignition system, Multi-speed blower motor, Smart thermostat compatibility, Safety shut-off valves.

Feature	Description
Heat Exchanger	Stainless steel construction for maximum efficiency
Ignition System	Electronic spark ignition for reliable startup
Blower Motor	Variable speed for optimized airflow
Thermostat Port	Compatible with Honeywell smart thermostats
Gas Valve	Precision gas flow control
Pressure Switch	Safety monitoring of combustion air
Flame Sensor	Ensures proper burner operation
Limit Switch	Prevents overheating
Filter Access	Easy-to-reach filter compartment
Diagnostic Lights	LED indicators for system status

Installation

Unpack and inspect all components. Ensure proper clearance around unit.

Gas Line Connection: Shut off gas supply; connect gas line with proper fittings.
Vent System: Install vent pipes according to local codes and manufacturer specifications.
Electrical Wiring: Connect to 120V power supply; install dedicated circuit if required.
Thermostat Wiring: Run low-voltage wires from furnace to thermostat location.
Ductwork: Connect supply and return ducts securely.

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

First-Time Setup

Power on furnace; follow startup sequence.

System Check: Ensure all connections are secure and gas supply is turned on.
Thermostat Setup: Program desired temperature settings and schedule.
Test Operation: Set thermostat to heat mode; verify proper ignition and heating.
Airflow Adjustment: Balance airflow through registers for optimal performance.
Safety Check: Verify all safety switches are functioning properly.

CAUTION! Never bypass safety devices. Ensure proper ventilation during operation.

Specifications

Heating Capacity: 40,000 - 120,000 BTU/h (model dependent)
Efficiency Rating: 80% - 98% AFUE
Fuel Type: Natural Gas or Propane
Electrical Requirements: 120V AC, 60Hz
Blower Motor: Multi-speed ECM or PSC
Vent Size: 2" - 4" PVC (category IV) or metal (category I)
Dimensions: Varies by model (typically 21"W x 48"H x 26"D)
Warranty: 20-year heat exchanger, 5-year parts
Operating Temp Range: -30°F to 120°F ambient

Controls and Settings

Access control board via front panel. Integrated diagnostic system with LED status lights.

Thermostat Controls: Temperature setting, Fan mode (Auto/On), System mode (Heat/Off), Program scheduling.

Furnace Settings: Blower speed adjustment, Temperature rise verification, Ignition trial settings, Safety lockout parameters. Diagnostic Codes: Flash patterns indicate specific error conditions for troubleshooting.

Connecting Thermostat

Compatible with most 24V thermostat systems including Honeywell T-series and smart thermostats.

Turn off power to furnace at circuit breaker.
Remove old thermostat and label wires.
Mount new thermostat base and connect wires according to terminal designations.
Restore power and configure thermostat settings.
Test heating cycle to ensure proper operation.

Tip: Use color-coded thermostat wire for easy identification of connections.

Operating Modes

Multiple operating modes for efficiency and comfort.

Heating Mode: Primary operation; maintains set temperature.
Fan Only: Circulates air without heating.
Vacation Mode: Maintains lower temperature to save energy.
Smart Recovery: Learns cycle times to reach set temperature at scheduled times.
Filter Reminder: Tracks runtime and indicates when filter needs replacement.

WARNING! Do not operate furnace with access panels removed. Keep combustible materials away from unit.

Safety Features

Flame Rollout Switch: Shuts off gas if flame extends outside burner area. High Limit Switch: Turns off burner if temperature exceeds safe limits. Pressure Switch: Ensures proper venting before ignition. Flame Sensor: Confirms burner ignition; shuts off gas if no flame detected.

Maintenance & Cleaning

Monthly: Check and replace air filter if dirty. Annual: Professional inspection and cleaning of burners, heat exchanger, and vent system.

CAUTION! Turn off gas and electrical power before performing any maintenance. Only qualified technicians should service gas components.

Regulatory Information

UL certified for safety standards. ANSI Z21.47 compliant for gas-fired central furnaces. Meets DOE energy efficiency requirements. For technical support, visit www.honeywell.com/homesupport or contact 1-800-468-1502. Installation must comply with National Fuel Gas Code (NFPA 54) and local building codes.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Furnace won't start	Power issue/thermostat	Check circuit breaker; verify thermostat settings; ensure door switch engaged.
No heat	Gas supply/ignition	Verify gas valve open; check for ignition attempts; inspect flame sensor.
Short cycling	Dirty filter/overheating	Replace air filter; check for blocked vents; verify proper airflow.
Blower runs continuously	Thermostat setting	Check fan setting (should be Auto, not On); inspect fan limit control.
Unusual noises	Mechanical issues	Check for loose components; inspect blower wheel; verify motor bearings.

Reset: Turn power off for 30 seconds then restore. Check diagnostic lights for error codes.

Service: 1-800-468-1502; www.honeywell.com/homesupport