Johnson Controls T-4003-203 Thermostat Els PW 17895 while the B-port is modified

while the B-port is modified for constant common port flow

or a blower motor that will not turn off even when the thermostat is disconnected

it handles non-corrosive refrigerants including R-22

Streamlined Aesthetic: Provides a clean

Johnson Controls T-4003-203 Thermostat Els PW 17895 while the B-port is modifiedThe Johnson Controls T 4003 203 is a high volume output submaster pneumatic thermostat engineered for precise proportional control in complex HVAC systems. Designed for reverse acting operation, this unit utilizes horizontal mounting and is specifically calibrated for applications where a remote master controller resets the setpoint based on external variables like outdoor air temperature. With a massive 400 SCIM flow capacity and a low 20 SCIM air