I am replacing my Bryant thermostats and Zoning board with Honeywell WiFi Thermostats
and a Honeywell HZ322 TrueZone zoning board. The Bryant thermostat, furnace and A/C unit use a A, B, C, D wire connections. The Honeywell equipment uses 5 wires (R,C,W,Y,G). I have 6 wires going to all the Thermostats and to the furnace.
My questions are 1) because the wires going to the furnace is currently only using 4 of the 6 wires; A,B,C,D, what connections do I make between the Zoning Board and to the furnace now that I am using the Honeywell TrueZone? The furnace has the A,B,C,D connection and also has the connector bar with the following screw connector: W2, Y1, DHUM, G, Com 24V, W/W1, Y/Y2, R. The Zoning board connectors are RH, RC,(which is jumper) W1/E, W2,Y1, Y2, G, O, B, DS/BK.
The second question is do I need to change any of the wires that are going between the Furnace and the A/C unit? They are currently using the A,B,C,D connections.