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Chrome-bevel sheet on grid paper — specs and return notes filed under the bay.
It acts as a lockout mechanism to manage the transition between the primary heat pump and auxiliary electric or gas heat based on outdoor ambient temperature
Technicians rely on the Antunes Model JD-2 series for its repeatable set points and durable diaphragm design
it handles non-corrosive refrigerants including R-22
while the B-port is modified for constant common port flow
Johnson Controls T-4003-203 Thermostat Els PW 17895 It acts as a lockoutThe 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