Johnson Controls A28AA-4 Temperature Control Els PW 17895 signaling the integrated furnace control

signaling the integrated furnace control to proceed with the ignition sequence

York S1-024-23280-700 -1

leak-free fit for existing gas manifolds

For technicians troubleshooting a lockout

Johnson Controls A28AA-4 Temperature Control Els PW 17895 signaling the integrated furnace controlThe Johnson Controls A28AA 4 is a heavy duty two stage temperature control designed for versatile HVAC applications requiring sequenced switching. This electro mechanical thermostat features dual SPDT switch action, allowing for precise control over two separate circuits based on temperature fluctuations. With a wide 30 to 110 degree setpoint range and a multi voltage capacity of 120 208 240 277 Vac, it is a standard component for commercial cooling