Luxaire Furnace Manual GM9S080C16UP11K

The Luxaire GM9S080C16UP11K is a high-efficiency gas furnace with 80,000 BTU input capacity, 80% AFUE rating, single-stage operation, multi-speed blower motor, electronic ignition, and durable heat exchanger construction. Designed for residential heating applications with natural gas compatibility, safety features including flame rollout protection, pressure switches, and thermal overload protection. Below are key sections for safety, features, installation, operation, maintenance, and troubleshooting.

Features at a Glance

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

Installation Requirements

Professional installation required. Verify local codes and obtain permits.

1. Location: Install in dry, clean area with adequate clearance and service access.
2. Venting: Use approved PVC or metal venting materials per local codes.
3. Gas Supply: Connect to natural gas line with proper sizing and shutoff valve.
4. Electrical: Connect to 120V AC power with proper grounding.
5. Ductwork: Ensure proper sizing and sealing of supply/return ducts.

WARNING! Gas furnaces produce carbon monoxide; proper venting is critical. Only qualified technicians should install.

First-Time Startup

Initial startup must be performed by qualified technician.

1. Verify installation: Check all connections, clearances, and venting.
2. Gas pressure: Measure and adjust manifold pressure to 3.5" WC.
3. Electrical: Verify proper voltage and grounding.
4. System check: Test ignition sequence, flame detection, and safety controls.
5. Commissioning: Measure temperature rise and adjust blower speed if needed.

CAUTION! Never bypass safety controls. Test carbon monoxide detectors after installation.

Specifications

• Model: GM9S080C16UP11K
• Input Capacity: 80,000 BTU/H
• AFUE Rating: 80%
• Gas Type: Natural Gas
• Manifold Pressure: 3.5" WC
• Electrical: 120V AC, 60Hz
• Blower Speeds: Multi-speed for heating/cooling
• Venting: Category I (natural draft) or Category IV (PVC)
• Dimensions: Standard upflow configuration
• Warranty: Limited lifetime heat exchanger, 5-year parts

Controls and Settings

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

Thermostat Connections: R (24V), W (Heat), G (Fan), C (Common)

Blower Speeds: Heating speed factory set; cooling speed adjustable for AC compatibility. Temperature Rise: Verify 35-65°F rise across heat exchanger. Pressure Switch: Verifies draft inducer operation. Limit Switches: High temperature protection. Flame Sensor: Microamp reading indicates proper flame detection.

Venting and Combustion Air

Proper venting is critical for safe operation and efficiency.

1. Vent Materials: Use approved PVC, ABS, or metal venting per local codes.
2. Vent Routing: Maintain proper slope and support; avoid restrictions.
3. Combustion Air: Provide adequate fresh air supply for proper combustion.
4. Clearances: Maintain required clearances to combustible materials.

Tip: Inspect venting annually for blockages or deterioration.

Operating Instructions

Furnace operation controlled by thermostat settings.

1. Thermostat Setting: Set to HEAT mode and desired temperature.
2. Normal Sequence: Thermostat calls for heat, inducer starts, pressure switch closes, ignition begins, gas valve opens, flame established.
3. Blower Operation: Blower starts after heat exchanger warm-up delay.
4. Cycle Completion: When thermostat satisfied, gas valve closes, inducer continues for post-purge.

WARNING! Never operate furnace without filter installed. Keep area around furnace clear.

Maintenance Procedures

Regular maintenance ensures efficiency and longevity.

1. Monthly: Check and replace air filter as needed.
2. Annual: Professional inspection and cleaning recommended.
3. Components: Clean flame sensor, inspect heat exchanger, check burners.
4. Venting: Inspect for blockages or damage.
5. Electrical: Check connections and control board operation.

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

Safety Features

Multiple safety systems protect against hazardous conditions.

Regulatory Information

UL listed and ANSI certified for safety and performance. Complies with U.S. Department of Energy efficiency standards. Manufactured to meet or exceed industry standards for residential gas furnaces. Copyright © Luxaire Heating and Air Conditioning. For technical support, contact authorized Luxaire dealers or visit www.luxaire.com.

Troubleshooting

Error Codes: LED flash patterns indicate specific fault conditions (refer to service manual).

Service: Contact authorized Luxaire dealer for professional service.