Lennox Electric Furnace Owners Manual

The Lennox Electric Furnace is a high-efficiency heating system designed for residential use, featuring advanced heating elements, multi-speed blower motor, integrated safety controls, diagnostic LED indicators, programmable thermostat compatibility, and energy-saving operation modes. Below are key sections for safety, features, installation, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Heating elements, Blower assembly, Control board, Limit switches, Diagnostic LEDs, Filter compartment, Thermostat connections.

Installation Requirements

Professional installation recommended. Ensure proper electrical service and ductwork.

1. Electrical requirements: 240V AC, dedicated circuit with proper amperage rating.
2. Ductwork: Properly sized and sealed duct system required.
3. Clearance: Maintain minimum clearances as specified in manual.
4. Venting: Ensure adequate combustion air and proper venting if applicable.

WARNING! Installation must be performed by qualified HVAC technician. Electrical shock hazard exists.

First-Time Setup

Initial startup and system configuration.

1. Power connection: Ensure proper electrical supply and disconnect switch.
2. Thermostat wiring: Connect compatible thermostat following wiring diagram.
3. System check: Verify all safety controls and limit switches.
4. Initial operation: Test heating cycle and blower operation.
5. Airflow verification: Check for proper airflow through all registers.

CAUTION! Do not operate without proper electrical grounding. Keep flammable materials away from unit.

Technical Specifications

• Heating Capacity: Various models from 30,000 to 60,000 BTU
• Voltage: 240V AC, 60Hz
• Blower Motor: Multi-speed PSC or ECM motor
• Temperature Rise: 35-70°F (varies by model)
• Airflow: Adjustable CFM settings
• Filter Size: Standard 16x25x1 or 20x25x1
• Safety Controls: Manual reset high limit, rollout switches
• Warranty: Limited lifetime heat exchanger, 5-year parts
• Dimensions: Varies by model (typically 21"W x 21"D x 49"H)

Controls and Settings

Access system controls via thermostat and internal control board.

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

Internal Controls: Blower speed taps, Limit switch settings, Diagnostic LED codes, Service switch. Settings: Temperature differential, Blower delay, Fan operation modes, Emergency heat settings.

Operating Instructions

Daily operation and seasonal use guidelines.

1. Set thermostat to desired temperature in HEAT mode.
2. Select fan operation: AUTO (runs with heat) or ON (continuous).
3. Monitor system for normal operation sounds.
4. Seasonal startup: Check filter, clear vents, test operation.
5. Seasonal shutdown: Clean unit, replace filter for storage.

Tip: Maintain consistent temperature settings for optimal efficiency.

Maintenance Schedule

Regular maintenance ensures optimal performance and longevity.

1. Monthly: Check and replace air filter if dirty.
2. Seasonal: Inspect electrical connections, clean blower assembly.
3. Annual: Professional inspection of heating elements, safety controls.
4. Biannual: Ductwork inspection, thermostat calibration.
5. As needed: Clean evaporator coil, check drain system.

WARNING! Always disconnect power before performing any maintenance. Use only manufacturer-approved parts.

Safety Features

Multiple safety systems protect against overheating and electrical hazards.

High Limit Switches: Automatic shutoff if temperature exceeds safe limits. Rollout Switches: Detect flame rollout conditions. Pressure Switches: Ensure proper airflow. Fuses/Circuit Breakers: Overcurrent protection. Door Safety Switch: Power interruption when access panel removed.

Care & Cleaning

Proper cleaning maintains efficiency and prevents breakdowns.

Exterior: Wipe with damp cloth, mild detergent if needed. Interior: Vacuum blower compartment, clean drain pan. Coils: Professional cleaning recommended. Electrical: Keep dry, no water contact.

CAUTION! Never use water or liquid cleaners on electrical components. Disconnect power before cleaning.

Regulatory Information

UL Listed: Meets Underwriters Laboratories safety standards. Energy Star: Compliant with energy efficiency guidelines. Local Codes: Installation must comply with local building codes. For support, visit www.lennox.com or contact 1-800-9-LENNOX. Serial number located on unit rating plate.

Troubleshooting

Reset Procedure: Turn off power for 5 minutes, then restore.

Service: 1-800-9-LENNOX; www.lennox.com