Hvac Float Switch Function: SS2 water level switch is used in HVAC systems to detect condensation water overflow; It detects blockage of air conditioning condensate water drain pipe and shuts down the system to prevent overflowing water from damaging floors, walls, and ceilings Working Principle: the float switch HVAC can be connected to a VCC or thermostat line; It is an NC type (normally closed) switch: when no water overflows, the float stays at the bottom of the switch, the switch closes the loop and outputs an ON signal; When the water overflows, the buoyancy of the float rises, the trigger switch turns on, and the output OFF signal turns off Specifications: switch type NC ( normally closed) , material PVC, operating temperature -20 - + 80℃, wire length 5.8ft, switching voltage Max; 200VDC; Switching current Max; 1 A contact rating Maximum 10W Easy to Install: this float switch HVAC is easy to install, all you need to do is install the 3/ 4 adapter that comes with the AC float