My Honeywell TrueZone 311 board does not have a terminal for the blue wire. Where does it go? I plugged in the wires for the dampers and the thermostats, but the five wires from the furnace to the zone board are incomplete due to the lack of a c terminal.
Connect a C-wire on the Honeywell TrueZone board
hvacthermostat-c-wire
Related Solutions
First off, the green wire should connect to the G terminal on the thermostat. It's connected to the G terminal in the furnace, and so should also go to the G terminal on the thermostat.
At the thermostat, the extra blue wire should connect to the C terminal. Depending on the furnace (read the documentation, and analyze the schematic to be sure), you should be able to connect the other end of the blue wire to either of the C terminals in the furnace.
I just got off the phone with Honeywell. If you only have a 4-wire older system, you'll only be able to use the fan in the "auto" position. It won't let you use the fan-only selection. You need a 5th wire for power for the wi-fi side of the thermostat. Call Honeywell and they'll walk you through it for free.
Related Topic
- Electrical – Where should I connect the C wire in a Janitrol furnace
- Honeywell Zone System Wiring
- Wiring – Where is “C” wire on Honeywell 8043F1036
- Installing Honeywell RTH9580WF on ICM280 Furnace Control Board
- Connect a C wire in an old Furnace
- Connect C wire for nest thermostat on a zoned HVAC system
- Help running a C wire from the furnace–no voltage from the C terminal on the circuit board
Best Answer
According to the install instructions, the zone board has dedicated R and C power terminals which should be connected to the corresponding transformer wires from the furnace, or to a dedicated 24VAC transformer if the furnace's transformer is not being used. If your furnace doesn't provide a C wire (typically blue), update your post with pictures of the setup and we can provide more help.