while 15 psig supply pressure shifts it to reverse acting for heating control

inducer housing

ventilation flaps

It is also a recommended upgrade for managing two-stage

this valve is a standard choice for hydronic systems requiring tight close-off and long-term durability

York S1-024-35611-000 Relay 323613-751 while 15 psig supply pressureThe York S1 024 35611 000 is an essential OEM HVAC compressor start relay designed for high voltage applications requiring 375V at 60Hz. As a veteran grade York replacement part, this relay is critical for managing the high inrush current during the startup cycle of industrial and residential HVAC motors. It ensures the start capacitor is dropped out of the circuit once the motor reaches the appropriate operational speed, protecting the windings from