Tag Archives: TWIN

Wiring AC to Furnace Terminals

By aharmona

Hello folks,

I have an American Standard Silver Series furnace installed and I’m trying to figure out which terminals the red and white wires from the air conditioner should connect to. I’ve tried Red with R and White with W obviously but nothing happens. My father-in-law installed the furnace and didn’t bother with the AC saying he’d get to it later but he doesn’t know anything about the wiring anyway.

The Silver Series terminals are as follows C, G, R, W,Y, TWIN. with Green, Red, Yellow and White wires connected according to their first letters.
The Hunter thermostat (model 44110) terminals are G, RC (with a jumper to) RH, Y, W with Green, Red, Yellow and White wires connected according to the letters with the Red wire connected to the RH terminal.
There is a blue wire which isn’t connected to any terminal in the thermostat or the furnace.

I had written down where the wires for the AC were connected prior but the previous furnace had a T terminal. Also I believe the Red wire was connected to the Y terminal and the White wire to the T Terminal.

If anyone can makes heads or tails of this and can tell me where the AC Red and White wires should go to, I’d be most grateful.

Thank you!

Source: DoItYourself.com