BLOWER SWITCH | IDXBLS1930

The Hayward Blower Vacuum Switch (Part Number: IDXBLS1930) is a safety component in Hayward H-Series Low NOx Induced Draft Heaters. Its primary function is to monitor the blower’s performance and ensure that sufficient airflow is present before the ignition process begins.

• Functionality:

• Airflow Verification: When the heater initiates a call for heat, the blower activates to provide the necessary air for combustion. The blower vacuum switch detects the resulting airflow.

• Safety Interlock: If the blower fails to generate adequate airflow, the vacuum switch remains open, preventing the ignition sequence from proceeding. This safety measure ensures that combustion does not occur without proper ventilation, reducing the risk of hazardous conditions.

• Continuous Monitoring: The blower vacuum switch continuously monitors airflow. If it detects a loss of airflow during operation, it will interrupt the gas supply and shut down the heater to prevent unsafe conditions.