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.
Zone Valve Wiring
Dec 22, 2005
2 Replies
What model #?
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.
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