Adjustments are made via the adjustment screw on the pilot assembly

Is an external vent line required for the R400S series

it is best practice to install the valve vertically with the timer facing upward or horizontally

What causes a B1370208 pressure switch to stay open

Lochinvar & A.O. Smith 100208660 Flow Switch 320735-701 Adjustments are made via theThe Lochinvar & A. O. Smith 100208660 Flow Switch is a critical OEM safety component engineered to monitor fluid velocity within the primary heat exchanger loop. As a veteran grade HVAC replacement part, this liquid flow switch utilizes a high precision #1 paddle assembly to detect consistent water movement, preventing the dry firing of high efficiency boilers. It serves as a direct replacement for WTR2210, WTR2210K, and 100173714 part numbers.