TACO ZV Wiring

Bill L.

Can someone help me with my wiring...my TACO zone valves won't open. I need to leave them in the open position instead of the auto position..here's what I have....(system is a gas fired boiler for a baseboard heating system..just heat..no hot water)

ON THE TRANSFORMER IN THE BOILER

**from the "G" terminal
-1 wire into junction box where relay is connected.
-1 wire from terminal#2 on the zone valve
-1 wire to the left terminal on the limit (temp) control

**from the "R" terminal
-1 wire from thermostat(s) (i.e.- white wire)

**from the "C" terminal
-1 wire into the junction box with the relay
-1 wire to the "TR" terminal on the gas valve

FROM THE "TH" TERMINAL ON THE GAS VALVE
-1 wire from "TH" to the limit control's right term.

ON THE ZONE VALVE(S)......
Terminal #1
-wire from thermostat (i.e. red wire)
Terminal #2
-wire from terminal "G" on transformer
Terminal #3
-??????? where does the wire that connects to this terminal originate????? in order to operate valve?????

My questions.....
? could the relay be bad?

?? What is the middle terminal on the gas valve (un-used at this point) used for..labeled "TH-TR"

---other pert. info.----
Transformer plate reads
120V 60Hz 25V 40VA Class 2 transformer

ANY HELP WILL BE GREATLY APPRECIATED......i'm hoping to add pics to help you help me...

Mark Hunt

Let's see if this works

Mark H

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chuck shaw

quick drawing

this is a quick drawing, i used differnt colors for drawing purpose only. you can only use up to 3 of those zone valves on each transformer. If the drawing isnt clear, check the instructions that came with the zone valves. or even easier, buy yourself a Taco zone control panel, and use that, wire it according to the instructions.

Chuck Shaw

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Rudy

Zone Valve Wiring

Unknown

Is this a Weil-McLain CGa boiler?

If it is then conventional Taco zone valve wiring will not work. Send me an e-mail and I will get you the correct diagram.

chuck shaw

Really Tim?

I must have more than a dozen CGa boilers in the field that are wired that way and working fine.

Chuck

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GEO_3

That is the wiring dia. that comes with the TACOs. It works with everything.

Unknown

Chuck, the CGa

I am talking about has a vent damper, with a Honeywell control center (transformer and relay) combination.

Unknown

Unknown

Did you guys get my

e-mail today? Is this the type of system that you are dealing with. Did the diagram help?

Mark Hunt

yup!


Check your e-mail.

Thanks!

Mark H

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Bill L.

Tim was a BIG help

I just wanted to thank Tim in the open forum here. And i also want to let all of the non-believers out there that the wiring diagram that Tim sent me worked indeed.
Again, thanks a lot Tim....

Unknown

Glad to help Bill...

call anytime.