Its open construction and energy-limiting design ensure it manages momentary short circuits effectively

and feedback signals to meet specific site requirements

B) correspond directly to the lettered and numbered terminals on original RLY02807 and RLY02257 boards

and 243-SR models where a robust 1-piece clamp is required for the upper housing assembly

Lochinvar & A.O. Smith 100110783 Pressure Switch 321894-706 Its open construction and energy-limitingThe Lochinvar & A. O. Smith 100110783 Pressure Switch is a critical safety component engineered for high efficiency commercial and residential boilers and water heating systems. As a blocked inlet pressure switch, this OEM replacement part is calibrated to monitor airflow and combustion exhaust conditions. If the venting system becomes obstructed or the inducer motor fails to maintain the required pressure differential, this switch breaks the