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-   -   how to connect zone valve to thermostat and transistor ? (http://www.houserepairtalk.com/f9/how-connect-zone-valve-thermostat-transistor-12887/)

acproblem 01-04-2012 12:12 PM

how to connect zone valve to thermostat and transistor ?
 
3 Attachment(s)
I have a problem to connect the thermostat/transistor wires to upper part of the zone valve (the picture with a red circle). I needed to replace the valve as it was leaking water. Now the new valve is on and the new cap is on ..however the wires are still dangling there ;-))
There is one wire coming from transistor - red wire
There are 3 wires coming from termostat (red, black and white). My termostat is heat only (I am heating running hot water in baseboards) so I am not sure the black wire is to be used. Can somebody pls let me know which screw of the valve cap I shall connect the wires to?. Maintenance guy told me if I do it wrong .. I might fry some part in new valve cap or termostat. Thanks a lot for your help

paul52446m 01-04-2012 12:39 PM

how to connect zone valve to thermostat and transistor ?
 
Quote:

Originally Posted by acproblem (Post 65895)
I have a problem to connect the thermostat/transistor wires to upper part of the zone valve (the picture with a red circle). I needed to replace the valve as it was leaking water. Now the new valve is on and the new cap is on ..however the wires are still dangling there ;-))
There is one wire coming from transistor - red wire
There are 3 wires coming from termostat (red, black and white). My termostat is heat only (I am heating running hot water in baseboards) so I am not sure the black wire is to be used. Can somebody pls let me know which screw of the valve cap I shall connect the wires to?. Maintenance guy told me if I do it wrong .. I might fry some part in new valve cap or termostat. Thanks a lot for your help

You only need the one from the transformer and two from the stat, as long as that zone valve is spring loaded return. I can't see the letters on the valve, can you tell me what they are? Paul

acproblem 01-04-2012 12:45 PM

Quote:

Originally Posted by paul52446m (Post 65901)
You only need the one from the transformer and two from the stat, as long as that zone valve is spring loaded return. I can't see the letters on the valve, can you tell me what they are? Paul

it is a Taco 571-2
<-- (one way)

acproblem 01-04-2012 02:21 PM

1 Attachment(s)
Quote:

Originally Posted by acproblem (Post 65902)
it is a Taco 571-2
<-- (one way)

I am adding the wiring instructions...there are 2 t-formers though ...2 zones ?

paul52446m 01-04-2012 02:47 PM

Quote:

Originally Posted by acproblem (Post 65909)
I am adding the wiring instructions...there are 2 t-formers though ...2 zones ?

Did they use all the wires before? Look at you stat and which wires are tied in there? Paul

acproblem 01-04-2012 03:27 PM

Quote:

Originally Posted by paul52446m (Post 65911)
Did they use all the wires before? Look at you stat and which wires are tied in there? Paul

I do not think so the black was used at all - it is heat only thermostat. I have put new thermostat. I also think 1 wire from transistor is missing...normally tranasistor should have 2 wires correct ?

paul52446m 01-04-2012 04:45 PM

Quote:

Originally Posted by acproblem (Post 65913)
I do not think so the black was used at all - it is heat only thermostat. I have put new thermostat. I also think 1 wire from transistor is missing...normally tranasistor should have 2 wires correct ?

If it is red and white going to stat, put red from transformer to post 2 on the zone head, put red from stat to the other post of the transformer, put white from stat on post one of the zone head.

acproblem 01-04-2012 09:26 PM

1 Attachment(s)
Quote:

Originally Posted by paul52446m (Post 65916)
If it is red and white going to stat, put red from transformer to post 2 on the zone head, put red from stat to the other post of the transformer, put white from stat on post one of the zone head.

thanks. so I shall connect the following way ?

JoeD 01-04-2012 09:30 PM

It's not a transistor. Stop calling it that. It is a transformer.

These are transistors, at least the bottom row is.

http://image.made-in-china.com/2f0j0...Transistor.jpg

JoeD 01-04-2012 09:33 PM

That diagram would certainly turn on the valve. But what turns on the heat? There is more to the system than just the valve and thermostat.


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