Rheem Gas Furnace Owners Manual

The Rheem Gas Furnace is a high-efficiency heating system designed for residential use, featuring advanced combustion technology, multiple safety systems, variable-speed blower motors, and energy-saving operation modes. Below are key sections for safety, features, installation, setup, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Gas valve, heat exchanger, blower assembly, ignition system, thermostat connection, safety switches, and exhaust system.

Installation Requirements

Professional installation required. Ensure proper location and clearances.

1. Location: Install in well-ventilated area with adequate clearance from combustible materials.
2. Gas connection: Use approved gas piping and fittings; pressure test required.
3. Electrical connection: 120V AC power supply with proper grounding.
4. Venting: Proper vent pipe installation following local codes and manufacturer specifications.
5. Thermostat wiring: Connect to compatible thermostat using low-voltage wiring.

WARNING! Installation must be performed by qualified HVAC technician. Improper installation can cause fire, explosion, or carbon monoxide poisoning.

First-Time Setup

Initial startup must be performed by qualified technician.

1. System check: Verify all connections, gas pressure, and electrical wiring.
2. Venting verification: Confirm proper draft and exhaust flow.
3. Gas pressure adjustment: Set manifold pressure to specifications.
4. Blower speed settings: Configure for optimal airflow.
5. Thermostat programming: Set heating schedules and temperature limits.
6. Safety testing: Verify all safety controls and limit switches function properly.

CAUTION! Do not attempt first-time startup without proper training and equipment.

Specifications

• Heating Capacity: 40,000 - 120,000 BTU/h (model dependent)
• Efficiency Rating: Up to 98% AFUE
• Gas Type: Natural gas or LP/propane (conversion kit required)
• Electrical Requirements: 120V AC, 60Hz
• Blower Motor: Variable-speed ECM
• Heat Exchanger: Stainless steel primary and secondary
• Venting: PVC pipe (2-3 inch diameter)
• Operating Temperature Range: -30°F to 120°F ambient
• Warranty: Limited lifetime heat exchanger, 10 years parts
• Dimensions: Varies by model (typically 21"W x 26"D x 40"H)

Controls and Settings

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

Control Board: POWER switch, STATUS LED, DIAGNOSTIC codes, DIP switch settings.

Thermostat Settings: HEAT/COOL/OFF mode, FAN AUTO/ON, temperature setpoints, programming schedules. Advanced Settings: Blower speed adjustment, temperature differential, filter timer reset, diagnostic mode access.

Operating Instructions

Normal operation controlled through thermostat.

1. Set thermostat to HEAT mode and desired temperature.
2. System will initiate heating cycle when room temperature drops below setpoint.
3. Normal sequence: Inducer motor starts, pressure switch verifies, igniter heats, gas valve opens, main burners ignite.
4. Blower motor starts after warm-up period to distribute heated air.
5. System cycles off when temperature reaches setpoint.
6. For continuous operation: Set fan to ON position at thermostat.

Tip: Maintain consistent temperature settings for optimal efficiency.

Maintenance Schedule

Regular maintenance ensures optimal performance and safety.

1. Monthly: Check and replace air filter if dirty
2. Annual (before heating season): Professional inspection and cleaning
3. Every 2 years: Heat exchanger inspection
4. As needed: Blower motor lubrication, vent pipe inspection

Professional Maintenance Includes: Burner cleaning, heat exchanger inspection, gas pressure check, safety control testing, blower cleaning and adjustment, vent system inspection.

Safety Features

Multiple safety systems protect against hazardous conditions.

Care & Cleaning

Turn off power and gas supply before any cleaning.

1. Air filter: Replace every 1-3 months depending on usage and environment
2. Exterior: Wipe with damp cloth; avoid harsh chemicals
3. Vent openings: Keep clear of debris and obstructions
4. Burners: Professional cleaning only - do not attempt
5. Blower assembly: Professional cleaning recommended annually

CAUTION! Never use water or cleaning solutions on electrical components. Always disconnect power before servicing.

Regulatory Information

UL certified for safety standards. ANSI Z21.47 compliant for gas appliances. Meets DOE energy efficiency requirements. Manufactured to comply with U.S. safety and performance standards. For technical support, contact Rheem Customer Service at 1-800-432-8373 or visit www.rheem.com. Keep this manual for future reference.

Troubleshooting

Reset: Turn power off for 30 seconds, then restore. If problem persists, contact professional service.

Emergency Shutoff: Turn off gas supply at unit and main valve if gas odor detected.

Service: 1-800-432-8373; www.rheem.com