Weil McLain 511-624-404 Pressure Switch Els PW 17895 the test must be performed

the test must be performed while the system is operating to ensure the vapor sample is representative of the circulating refrigerant

color codes signify specific temperature ratings

If the internal slide mechanism of the reversing valve is mechanically seized

Key Benefits Optimized Contaminant Capture: Molded core traps debris and sludge in a single pass to prevent compressor orbital damage

Weil McLain 511-624-404 Pressure Switch Els PW 17895 the test must be performedThe Weil McLain 511 624 404 Pressure Switch is a critical safety component engineered for CGS Series Boilers (Size 6), providing precise monitoring of combustion air and flue gas pressures. Operating with a 0. 95" W. C. set point, this differential air pressure switch is calibrated for standard elevations from 0 to 1,999 feet. As an OEM replacement part, it ensures the boiler's induction blower provides sufficient airflow before allowing the ignition