The Schneider Electric (Erie) VM3312P33A000 is an industrial-grade 3-way modulating zone valve engineered for precision flow control in closed hydronic systems

and large-scale ventilation systems

it is recommended to mount the solenoid with the coil in a vertical and upright position

It serves as the primary HVAC defrost control center

making it a staple for commercial boiler feeds and industrial heating loops

Lochinvar & A.O. Smith 100111317 Pressure Switch 326010-701 The Schneider Electric (Erie) VM3312P33A000The Lochinvar & A. O. Smith 100111317 Pressure Switch is a critical OEM safety component engineered for precise airflow verification in high efficiency water heaters and boilers. This normally open air pressure switch is calibrated to a fixed set point of 0. 20" WC (Water Column), ensuring the combustion blower is generating sufficient negative pressure before the ignition sequence initiates. As a genuine 100111317 replacement part, it provides the