installing a switch with the wrong setpoint can cause dangerous ignition delays or permanent system lockouts

including Armstrong

Optimized Performance: Operates at a 24 VDC coil rating

Because the teeth of the Sure-Flex Plus 4JN lock securely into the flange teeth without the need for clamps or screws

What causes this hi-limit switch to trip

Johnson Controls P70AA-400 Pressure Control 30067439-890 installing a switch with theDesigned for professional contractors, the Johnson Controls P70AA 400 is an industrial grade high pressure control engineered specifically for condenser fan cycling and high side pressure management. This SPST pressure switch features an Open Low action, meaning it breaks the circuit on a pressure drop and makes on a pressure rise, ensuring optimal head pressure control in systems using R410A refrigerant. With a versatile adjustable pressure range of