, posted Mon 20 Oct 23:33
Want to connect the 5th "C" wire from the thermostat to the ARH-1 control. There are two "C" screws marked on the ARH-1, one is where all the thermostat wires hook up too an the other is where the air handler hooks up to this control card. I can't determine which "C" to hook up this wire too. Anyone have a suggestion? Thank you.
"Argo ARH-1" 
