Weil McLain 511-624-402 Pressure Switch Els PW 17895 What is the purpose of

What is the purpose of the 1 1/2" shank

By monitoring for blockages in the venting or heat exchanger failures

and PTC series unit heaters manufactured after May 2007 utilizing direct spark ignition

simplifying inventory and part identification

Weil McLain 511-624-402 Pressure Switch Els PW 17895 What is the purpose ofThe Weil McLain 511 624 402 Pressure Switch is an essential safety component specifically engineered for induced draft combustion systems. Calibrated to a 1. 48" WC setpoint, this SPST (Single Pole Single Throw) switch monitors the differential pressure across the inducer motor to ensure the venting system is clear of obstructions before ignition. This HVAC pressure switch features a dual 1 4" barb connection for easy integration with standard