Its all-cast aluminum NEMA 4 enclosure houses a 17-4 PH stainless steel piezoresistive sensor

Versatile Mounting: Part of the pneumodular system

The most common symptom is short cycling

ensuring consistent airflow across various duct configurations

This SPST (Single Pole Single Throw) controller is specifically designed for unit heaters

Lochinvar & A.O. Smith 100166238 Switch 318820-201 Its all-cast aluminum NEMA 4The Lochinvar & A. O. Smith 100166238 Gas Pressure Switch is a critical safety component designed for high performance gas fired boilers and commercial water heaters. Featuring a 1 20" WC adjustable range, this manual reset gas pressure switch ensures system integrity by monitoring incoming or manifold gas pressure. If pressures deviate from the calibrated setpoint, the switch initiates a safety lockout, preventing hazardous combustion conditions.