![]() The RH terminal passes 24-volt power to the heating circuit on a call for heat. If you have an RC terminal then you also have an RH terminal. The RC terminal is the terminal for 24-volt hot and passes power to the cooling circuit for air conditioners. If your thermostat only has an R terminal (versus separate RH and RC terminals) then the R terminal will pass power to all the other terminals except the C terminal. So the 24 volt power would come from the transformer and passed to the G terminal which controls the fan relay. For example – If you turn on the fan only switch on the thermostat a switch inside the thermostat closes completely the circuit and powering up the fan relay. ![]() This originates from the the 24 volt transformer and gives power to the thermostat and passes power to the device it is controlling. The R terminal is the 24 volt hot terminal.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |