Owner's Manual for Amana Furnace Model Number GMS80703ANBB

The Amana GMS80703ANBB is a high-efficiency gas furnace designed for residential heating applications. This 80,000 BTU unit features multi-speed blower operation, electronic ignition, durable heat exchanger construction, and safety controls including flame rollout and limit switches. Below are key sections for safety, features, installation, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Durable steel heat exchanger, multi-speed direct drive blower, hot surface ignitor, flame sensor, gas valve, pressure switches, and control board.

Installation Requirements

Professional installation required. Verify local codes and obtain permits.

1. Location: Install in dry, clean area with adequate combustion air and service clearance.
2. Venting: Properly size and install vent pipes per manufacturer specifications.
3. Gas Supply: Connect to appropriate gas supply with sediment trap.
4. Electrical: Connect to 120V AC power with proper grounding.
5. Ductwork: Ensure proper sizing and sealing of supply and return ducts.

WARNING! Gas furnaces produce carbon monoxide. Proper installation and venting are critical for safety. Installation must be performed by qualified technician.

First-Time Setup

Initial startup must be performed by qualified technician.

1. Verify installation: Check all connections, venting, and clearances.
2. Gas pressure: Adjust gas valve for proper manifold pressure.
3. Electrical: Verify proper voltage and grounding.
4. Combustion: Check and adjust air-fuel mixture.
5. Safety controls: Test all limit and safety switches.
6. Blower speed: Set appropriate airflow for heating application.

CAUTION! Never attempt to adjust gas pressure or combustion settings without proper training and equipment.

Specifications

• Model: GMS80703ANBB
• Heating Capacity: 80,000 BTU/H
• Efficiency: 80% AFUE
• Gas Type: Natural Gas
• Electrical: 120V AC, 60Hz
• Blower Speeds: Multi-speed direct drive
• Venting: Category I
• Dimensions: Standard upflow configuration
• Filter Size: 1-inch standard
• Warranty: Limited lifetime heat exchanger warranty

Controls and Settings

Thermostat controls furnace operation. Furnace includes integrated control board with diagnostic LED.

Thermostat Settings: HEAT/COOL/OFF, FAN AUTO/ON, Temperature setpoint.

Control Board: Monitors furnace operation, provides diagnostic codes via LED flash patterns. Safety Controls: Limit switches prevent overheating, pressure switches verify vent operation, flame rollout switch detects improper combustion. Blower Control: Multi-speed operation with timing delays for proper heat exchange.

Venting and Combustion Air

Proper venting is critical for safe operation and efficiency.

1. Vent pipes must be properly sized and supported.
2. Maintain required clearances to combustible materials.
3. Ensure adequate combustion air supply.
4. Vent terminals must be clear of obstructions.
5. Regularly inspect vent system for deterioration or blockage.

Tip: Install carbon monoxide detectors near sleeping areas and on each level of home.

Operating Instructions

Furnace operation is controlled by thermostat.

1. Set thermostat to HEAT mode.
2. Adjust temperature setpoint above room temperature.
3. Furnace will initiate heating cycle: inducer motor starts, pressure switch verifies, ignitor heats, gas valve opens, burner lights.
4. After proving flame, blower motor starts after brief delay.
5. When thermostat is satisfied, gas valve closes, blower continues for heat dissipation.
6. For continuous fan operation, set thermostat fan to ON position.

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

Maintenance Procedures

Regular maintenance ensures safe and efficient operation.

1. Monthly: Check and replace air filter as needed.
2. Annual: Professional inspection and cleaning.
3. Burner inspection: Clean and verify proper flame pattern.
4. Heat exchanger: Inspect for cracks or deterioration.
5. Vent system: Check for obstructions or damage.
6. Electrical: Check connections and component operation.
7. Safety controls: Verify proper operation of all safety devices.

Care & Cleaning

Keep furnace area clean and clear of combustible materials.

Air Filter: Replace regularly (typically 1-3 months) to maintain airflow and efficiency. Burners: Professional cleaning only. Blower: Vacuum accessible areas during filter changes. Cabinet: Wipe exterior with damp cloth.

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

Regulatory Information

ANSI Z21.47: Certified for natural gas operation. CSA International: Certified to applicable standards. This furnace must be installed in accordance with local building codes, National Fuel Gas Code (NFPA 54), and National Electrical Code (NFPA 70). For support, contact Amana Heating & Air Conditioning at 1-888-292-6262 or visit www.amana-hac.com.

Troubleshooting

Reset: Power cycle furnace by turning off power for 30 seconds then restoring.

Service: 1-888-292-6262; www.amana-hac.com