Experienced technicians can trim the 6-inch paddle using the provided notches to match the specific pipe diameter and required flow activation sensitivity of the system

It features a specific 34-second trial for ignition period

With a factory-calibrated open temperature of 55°F and a close temperature of 45°F

optimized for efficient air displacement

This specific model features standard 1/4" HAV fittings without built-in ball valves

Lochinvar & A.O. Smith 100208488 Relay Board R-410A Experienced technicians can trim theThe Lochinvar & A. O. Smith 100208488 Relay Board is a critical OEM replacement part engineered for high performance hydronic heating and water heating systems. As the direct replacement for RLY2049, this board facilitates precise communication between the Smart System control module and peripheral components, including pumps, fans, and gas valve relays. Designed for Lochinvar Knight boilers and A. O. Smith commercial units, it ensures accurate