Liebert 1A18660P1S Switch 322838-752 or burner lockout

or burner lockout

a different MEP series programmer with internal DIP switches may be required

It is designed to be paired with Tjernlund VH Series vent hoods to complete the external termination of the exhaust system

Snap-Action Reliability: The mechanical snap-action switch reduces arcing and ensures a decisive "on/off" response to temperature changes

these deep-pleated filters offer significantly more surface area than standard 1-inch variants

Liebert 1A18660P1S Switch 322838-752 or burner lockoutThe Liebert 1A18660P1S is a critical OEM liquid level float switch engineered for precision monitoring in high demand HVACR environments. Designed specifically for Liebert Challenger 3000 and IR humidifier assemblies, this direct replacement float switch (replaces part 1A18660P1) ensures operational integrity by managing fluid levels within tanks and drain pans. It functions by opening or closing electrical circuits when levels fluctuate outside of