Lux Air Furnace Manual

The Lux Air Furnace is a high-efficiency residential heating system with advanced temperature control, multiple heating stages, smart thermostat compatibility, energy-saving modes, safety shutoff features, and easy maintenance access. Designed for reliable performance with AFUE ratings up to 96%, this furnace operates on natural gas or propane and includes features like variable-speed blower, diagnostic LED indicators, and built-in air filtration. Below are key sections for safety, features, installation, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Heat exchanger, blower assembly, gas valve, ignition system, control board, air filter, flue pipe connections, thermostat terminals.

Feature	Description
Variable-speed blower	Adjusts airflow for optimal efficiency and comfort
Multi-stage heating	Two-stage operation for consistent temperature
Diagnostic LED	Displays error codes for troubleshooting
Smart thermostat compatible	Works with most modern thermostat systems
Air filter access	Easy-to-reach filter compartment
Safety shutoff	Automatic shutdown for overheating or gas issues
Flame sensor	Monitors burner operation
Pressure switch	Ensures proper venting operation
Ignition control	Hot surface ignition system
Gas valve	Regulates fuel supply to burners

Installation

Unpack and inspect all components. Ensure proper clearances and ventilation.

1. Position furnace: Place on stable, level surface with adequate clearance.
2. Connect gas line: Use approved gas piping and fittings; pressure test required.
3. Connect electrical: 120V AC power supply with proper grounding.
4. Install venting: Use approved PVC or metal vent pipes as required.
5. Connect thermostat: Low-voltage wiring to control board terminals.
6. Install air filter: Insert proper size filter in filter compartment.

WARNING! Installation must be performed by qualified HVAC technician. Gas connections require leak testing.

First-Time Setup

Power on furnace; follow startup sequence.

1. Set thermostat: Program desired temperature and schedule.
2. Check gas pressure: Verify proper manifold pressure settings.
3. Test ignition: Observe startup sequence for proper operation.
4. Adjust blower speed: Set appropriate CFM for your duct system.
5. Configure settings: Use dip switches for staging and timing options.

CAUTION! Ensure proper ventilation and clearances before first operation.

Specifications

• Heating Capacity: 40,000-120,000 BTU/h
• AFUE Rating: Up to 96% efficiency
• Fuel Type: Natural gas or propane
• Electrical: 120V AC, 60Hz
• Blower Motor: Variable-speed ECM
• Stages: Single or two-stage operation
• Sound Level: As low as 65 dB
• Warranty: 10-year heat exchanger, 5-year parts
• Operating Temp Range: -30°F to 120°F ambient

Controls and Settings

Access control board via front panel. LED indicators show system status and error codes.

Thermostat Controls: Temperature setting, fan control (auto/on), system mode (heat/off), programming schedule.

Control Board: Power switch, diagnostic LED, dip switches for configuration, reset button. Settings: Blower speed adjustment, heating stages, temperature limits, fan delay timing, filter reminder reset.

Connecting Thermostat

Compatible with most 24V thermostats. Standard wiring: R (power), W (heat), G (fan), Y (cool), C (common).

1. Turn off power to furnace before wiring.
2. Connect thermostat wires to control board terminals.
3. Match wire colors to terminal labels.
4. Secure connections and replace access panel.
5. Restore power and test operation.

Tip: Use programmable thermostat for maximum energy savings.

Operating Modes

Multiple operating modes for efficiency and comfort.

1. Heat Mode: Primary heating operation with staged heating.
2. Fan Only: Continuous air circulation without heat.
3. Standby: System ready but not actively heating.
4. Diagnostic Mode: LED flashes error codes for service.
5. Test Mode: For technician testing and calibration.

WARNING! Do not attempt to operate if gas odor is detected. Evacuate and call for service.

Safety Features

Flame rollout switch: Shuts off gas if flame escapes burner area. High limit switch: Prevents overheating. Pressure switch: Ensures proper venting. Ignition safety: Monitors flame presence. Gas valve: Automatic shutoff if ignition fails.

Maintenance & Cleaning

Regular maintenance ensures optimal performance and safety.

1. Monthly: Check and replace air filter as needed.
2. Seasonal: Inspect burners and heat exchanger.
3. Annual: Professional cleaning and inspection.
4. As needed: Clean flame sensor and igniter.

CAUTION! Turn off power and gas supply before performing any maintenance.

Regulatory Information

UL listed and ANSI certified. Complies with ASHRAE standards for residential heating equipment. Manufactured to meet or exceed industry safety standards. For technical support, visit www.luxairfurnace.com or contact 1-800-555-HEAT. All installations must comply with local building codes and regulations.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Furnace won't start	Power, thermostat, gas	Check power switch, thermostat setting, gas valve position
No heat	Pilot/ignition, filter	Check ignition system, replace dirty air filter
Blower won't stop	Thermostat setting	Check fan setting (auto/on), thermostat wiring
Unusual noises	Motor, blower wheel	Inspect blower assembly, lubricate if needed
Short cycling	Filter, thermostat	Replace filter, check thermostat location and calibration

Reset: Power cycle or use control board reset button if equipped.

Service: 1-800-555-HEAT; www.luxairfurnace.com