Oil Pressure Controls HVAC School
So, when we start the compressor, power is applied to V1 (or to V), and once oil pressure builds up to the 912 PSIG range, it will open switch PC and deenergize the heater. Now, if this switch (PC) is closed, and the control is energized (power to V1 or V2), then heater H is energized. Once that heater reaches a certain temperature, switch TD ...
