Lochinvar & A.O. Smith 100111630 Pressure Switch 328140-751 It stays open to vent

It stays open to vent trapped gas when the system is off

Excessive inlet pressure can lock up the internal diaphragm

It is a best practice for contractors to replace the capacitor whenever installing a new condenser fan motor to ensure proper startup torque

which prevents premature HVAC belt wear

the specific W

Lochinvar & A.O. Smith 100111630 Pressure Switch 328140-751 It stays open to ventThe Lochinvar & A. O. Smith 100111630 Pressure Switch is a critical safety component designed for precise air pressure detection in high efficiency water heaters and boiler systems. Specifically calibrated to a 1. 00" WC (Water Column) set point, this SPST (Single Pole Single Throw) switch features a normally open (NO) contact configuration. It is engineered to monitor the combustion chamber pressure, ensuring the blower motor is sufficiently venting