Description
The Lennox 104937-02 Combustion Air Pressure Switch Kit is a crucial component designed for use in downflow furnaces operating at elevations ranging from 7501 to 10000 feet. This kit includes a combustion air pressure switch with specific pressure set points to ensure safe and efficient combustion processes within the furnace. The pressure switch, set at both high and low points, plays a pivotal role in monitoring and controlling airflow, which is essential for the proper functioning of the furnace.
Key features and components of the Lennox 104937-02 Combustion Air Pressure Switch Kit:
- Pressure Switch: The kit's central component is the combustion air pressure switch. This switch is a sensitive device that measures the pressure of the air entering the combustion chamber. It operates as a safety mechanism to confirm that adequate airflow is present for combustion to occur safely.
- Pressure Set Points: The pressure switch is designed with specific set points, including a high set point of 0.90 inches of water column (WC) and a low set point of 0.25 inches WC. These set points are carefully calibrated to ensure that the furnace operates within safe and efficient parameters.
- SPST N.O. Configuration: The pressure switch is typically configured as a Single-Pole, Single-Throw Normally Open (SPST N.O.) switch. In this configuration, the switch remains open in its normal state and closes when the measured pressure reaches the specified set point. This closure indicates that the airflow is within the safe range for combustion.
- Compatibility: The Lennox 104937-02 Combustion Air Pressure Switch Kit is specifically designed for compatibility with downflow furnaces operating at elevations within the specified range. Proper compatibility ensures that the pressure switch functions correctly within the furnace system.
- Combustion Safety: The pressure switch plays a critical role in ensuring combustion safety. If the airflow falls below the low set point or exceeds the high set point, the pressure switch will open, interrupting the ignition sequence and preventing the furnace from operating until safe conditions are restored.
- Furnace Efficiency: By monitoring and controlling airflow, the pressure switch contributes to the overall efficiency of the furnace. It helps maintain the correct air-to-fuel ratio for combustion, maximizing heating efficiency and reducing energy consumption.
For HVAC technicians and professionals, the Lennox 104937-02 Combustion Air Pressure Switch Kit is an essential component when servicing or maintaining downflow furnaces operating at high elevations. Proper functioning of this pressure switch is vital for the safety and performance of the furnace, ensuring that combustion occurs within the specified parameters.
