I have an older house with 2 zones - Main level and Basement. The Basement
heat never worked. I just installed a new zone valve in the basement. Can
someone tell me how to wire the zone valve. It is a Honeywell zone valve
with 4 wires - 2 red and 2 yellow.
Thanks,
D.

What model #?

Dave wrote:
I have an older house with 2 zones - Main level and Basement. The Basement
heat never worked. I just installed a new zone valve in the basement. Can
someone tell me how to wire the zone valve. It is a Honeywell zone valve
with 4 wires - 2 red and 2 yellow.
Thanks,
D.


One pair runs the motor that drives the valve itself. The other is a
limit switch contact that shorts when the valve is fully operated.

The motor pair, the thermostat and the transformer are hooked in a
series circuit. The transformer will be used with several zones.

All the limit switches are hooked in parallel and used to operate a
relay that controls furnace/boiler and the circulator pump. Note the
relay has its on internal transformer so the zone valve switches are all
low voltage.

Sorry if that's not clear.