thermostat controls help
thermostat controls help
(OP)
Hi all
Can someone tell how electrical power is supplied to thermostat controls of HVAC equipment?
Who normally supplies this power?
Any help or direction of reading material is greatly appreciated.
Sincerely
Can someone tell how electrical power is supplied to thermostat controls of HVAC equipment?
Who normally supplies this power?
Any help or direction of reading material is greatly appreciated.
Sincerely





RE: thermostat controls help
R - 24 V
C - Common leg of 24 V
G - Fan
Y - Cooling
W - Heating
O - Reversing valve if it's a heat pump.
If it's not a package unit, then generally the controls contractor will provide whatever transformer(s) may be required. Depending on the situation (complex) a 120V circuit may need to be provided if it's a more complex control situation. If not then many times, the contractor will step down power from the main incoming power to the unit.
RE: thermostat controls help