Lennox G51 User's Information Manual

Lennox G51 manual cover
Pages 7
Year 2003
Language(s)
English en

Lennox G51 Specification

The Lennox G51 is a mid-efficiency gas furnace designed to provide reliable and consistent heating for residential spaces. It operates with an efficiency rating of up to 92.1% AFUE, ensuring significant energy savings compared to older, less efficient models. The furnace is equipped with a robust heat exchanger crafted from aluminized steel for enhanced durability and efficient heat transfer. Its single-stage gas valve and fixed-speed blower motor deliver steady and quiet operation, maintaining a comfortable indoor environment without abrupt temperature fluctuations.

The G51 model incorporates Lennox's Duralok Plus heat exchanger, which is constructed for long-lasting performance and resistance to corrosion. It features a silicon nitride igniter, replacing traditional pilot lights, to ensure reliable ignition and reduce energy consumption. The unit is compatible with multiple ventilation options, allowing flexible installation to suit various home configurations. Additionally, the furnace is designed with a sealed blower compartment to minimize air leakage, further optimizing energy use.

For user convenience, the Lennox G51 supports integration with advanced thermostat systems, including programmable options, to allow precise temperature control and scheduling. The furnace's design focuses on ease of maintenance, with accessible components that simplify routine inspections and service tasks. Its compact size and versatile installation options make it suitable for various residential applications, fitting easily within existing HVAC configurations. The Lennox G51 combines efficiency, reliability, and user-friendly features, making it a practical choice for homeowners seeking an effective heating solution.

Lennox G51 F.A.Q.

How do I reset the Lennox G51 furnace?

To reset the Lennox G51 furnace, turn off the power to the unit at the circuit breaker, wait for about 10 seconds, then turn the power back on. This will reset the system.

What should I do if my Lennox G51 furnace is not igniting?

Check if the gas supply is turned on and ensure that the thermostat is set to heat mode. Inspect the igniter for any signs of damage or wear and replace if necessary.

How often should I replace the air filter in my Lennox G51 furnace?

It's recommended to check the air filter every month and replace it every 1-3 months, depending on usage and environmental conditions.

Why is my Lennox G51 furnace making unusual noises?

Unusual noises could be due to loose components, a dirty blower wheel, or issues with the motor. Inspect these components and tighten or clean as necessary.

What regular maintenance should I perform on my Lennox G51 furnace?

Regular maintenance includes checking and replacing air filters, inspecting the blower assembly, ensuring the flue is clear, and checking electrical connections for tightness.

How do I check the error codes on my Lennox G51 furnace?

The Lennox G51 furnace has an LED indicator that flashes error codes. Refer to the furnace manual for the specific meaning of each code.

Can I adjust the blower speed on my Lennox G51 furnace?

Yes, the blower speed can be adjusted by changing the connections on the blower motor. Refer to the wiring diagram in the manual for guidance.

What could cause my Lennox G51 furnace to overheat?

Overheating may be caused by a clogged air filter, blocked vents, or issues with the blower motor. Ensure airflow is not restricted and the motor is functioning correctly.

How do I clean the burners on my Lennox G51 furnace?

Turn off the power and gas supply. Remove the burner assembly and use a soft brush to clean any debris. Reinstall the assembly and check for proper operation.

What should I do if my Lennox G51 furnace is cycling on and off frequently?

Frequent cycling may be due to a thermostat issue, a clogged filter, or improper airflow. Check the thermostat settings, replace the filter, and ensure vents are not blocked.