Lochinvar & A.O. Smith 100109877 Pressure Switch 321894-706 Always verify the power element

Always verify the power element charge is appropriate for the specific refrigerant in use

A: The 24-volt AC assembly includes the thermocouple

making it fully compatible with HFC refrigerants including R404A

accommodating standard field wiring gauges

ensuring seamless mechanical and electrical integration without the need for field programming

Lochinvar & A.O. Smith 100109877 Pressure Switch 321894-706 Always verify the power elementThe Lochinvar & A. O. Smith 100109877 Pressure Switch is a critical safety component designed for high efficiency commercial boilers and water heaters. This SPST pressure switch (Single Pole Single Throw) is engineered to monitor low gas pressure conditions, typically calibrated at a 5. 2" WC set point to ensure the system operates within safe manifold parameters. As an authentic OEM replacement part, it provides a direct fit for models including the