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Honeywell Zone Valves

 
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Old 01-12-2019, 11:16 AM   #1
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Honeywell Zone Valves


Radiator heat.

We just charged up our two-zone hydronic heating system after a year of remodeling. When either zone (thermostat) calls for heat, now both loops are circulating freely, not just one. This wasn't the case prior to the remodel. The zone valve levers are in the left/ (closed) position for both, even though the heat calls are circulating water through both loops. Do Honeywell zone valves break in this fashion, or does it sound like something else entirely is going on?

I will call back the Plumber/HVAC guy, but he's the one that said everything was operating fine yesterday. Just trying to get some understanding ahead of time.

Thanks.

Last edited by MarkJames; 01-12-2019 at 11:21 AM.
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Old 01-12-2019, 12:00 PM   #2
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Re: Honeywell Zone Valves


Do they both show voltage to them when only one zone is calling for heat?

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Old 01-12-2019, 12:08 PM   #3
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Re: Honeywell Zone Valves


Quote:
Originally Posted by hdavis View Post
Do they both show voltage to them when only one zone is calling for heat?
Unsure, but I'll check later.

Still, the valve is not being operated with setting changes, just appears to be always "closed"...yet water is still cycling through both. (Now wondering what the valve guts look like.)
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Old 01-12-2019, 12:57 PM   #4
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Re: Honeywell Zone Valves


If they'e like Taco, closed isn't the right way to think about it. There is manual open, and then there is control actuated, what you're calling closed.

The actual actuator is wax that expands when heated and opens the valve.
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Old 01-12-2019, 01:13 PM   #5
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Re: Honeywell Zone Valves


Most commonly, the wax actuator gets weak over time, and the valve stays closed. I suppose if the valve was manually opened for an extended period, it could get stuck open.
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Old 01-12-2019, 01:15 PM   #6
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Re: Honeywell Zone Valves


I recall the motor whirring to operate the valve (and move the lever). Something's probably up with the wiring, though it is firing up the boiler and Taco circulator pump.
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Old 01-12-2019, 01:27 PM   #7
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Re: Honeywell Zone Valves


Just checked, honeywell is motor driven, not wax driven. That makes troubleshooting potentially a little more complicated.

Sounds like a wiring issue.

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