McDonnell & Miller FS4-3DS Switch THPU32HP7Y Manual Reset Logic: Prevents the

Manual Reset Logic: Prevents the system from auto-restarting after a safety trip

this unit is specifically designed to facilitate the reliable ignition sequence required for high-efficiency Sterling unit heaters

ensuring exact electrical specifications and mounting footprints

this switch acts as a critical fail-safe

McDonnell & Miller FS4-3DS Switch THPU32HP7Y Manual Reset Logic: Prevents theAs an HVACR veteran, you know that missing flow in a hydronic system or process loop is a recipe for catastrophic equipment failure. The McDonnell & Miller FS4 3DS (Part Number 114642) is the heavy duty solution when you need reliable liquid flow switch performance in aggressive environments. Built with a stainless steel body and wetted parts, this unit is specifically designed to handle corrosive fluids that would degrade standard brass models. It