inverted zone valve

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  #1  
Old 08-20-09, 09:28 AM
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inverted zone valve

Hello,

I have a 2 zone hydronic controlled by 2 Erie zone valves (model 465B327 30 A1).

Boiler was replaced from house lately.

Without power applied to zone valve motor, valve lets water flow pass. (normaly on)

According to this:

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Normally when thermostat comes on, valve should eventually open and electric contact controling boiler should come on, right ?


Mine is reversed. How can I connect these 2 valves to my heating system ?

Please help !

Thanks
 
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Old 08-20-09, 04:33 PM
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The link to your pic didn't work correctly... I'll see if I can fix, but you might have to re-do it is I can't find your pic.

I haven't looked at the spec on your valves yet, but if they are indeed NORMALLY OPEN valves, then they are the wrong ones for your application. Zone controls require NORMALLY CLOSED valves.
 
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Old 08-20-09, 05:08 PM
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Thank you for your answer.
photos are at:

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So these are unusable !?. I was hoping there was another configuration.

I tried to use the cool output on thermostat to reverse the operation.
Seems to work, but there is 3 degrees difference.

Can bodies be changed to convert them to normaly closed ?

Thanks again.
 
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Old 08-20-09, 05:25 PM
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Funny, url is beeing cut-off, I will try this again

http://i224.photobucket.com/albums/d...g?t=1241232619

Maybe this:
http://www.centralboiler.com/Tech/C160.pdf

Just found that :
A reverse-acting (close-on-rise) thermostat
is required to control a normally open (N.O.)valve.
http://www.white-rodgers.com/wrdhom/.../0037-6334.pdf

I have a hunter thermostat which has a jumper HG or HE connection(orange wire).
No documentation on this.

I wonder if this would reverse logic.

Thanks
 

Last edited by NJT; 08-20-09 at 06:17 PM.
  #5  
Old 08-20-09, 05:50 PM
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Here ia a photo of the thermostat.

http://i652.photobucket.com/albums/u...o/SDC10154.jpg

Anyone knows what HG or HE means (orange wire)?
 
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Old 08-20-09, 06:20 PM
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Hey! I'm flattered that you found my drawings!

I think we need to back up some though, you posted a drawing from Central Boiler... are you installing a wood burning system?

Tell us exactly what you are working on, because I'm afraid I'm making ASSumptions that might not be true.
 
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Old 08-21-09, 02:47 AM
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That happened to me once with some black plastic zone valves that had a hidden little switch on the side that changed them from normally open to normally closed. They came in the wrong position and it took me an hour to find the answer.
btw, those black plastic Taco zone valves were crap. We had dozens of failures.
 
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Old 08-21-09, 07:00 AM
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I am glad you said were crap. The redesign after many failures have been working well.
You stated you had Erie zone valves and than talk about White Rogers and show Taco valves. You need to stick with info only on the valve you have. They all wire differently and may operate differently. What is the model of the valve you have?
 
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Old 08-21-09, 08:05 AM
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OK, thank you all for the info (and pictures) !

I have an electric boiler (no wood)
I am using Erie. I didn't say anything about other companies.

Guess, I will change my valves.

I would like to change the control only (not the body if possible) ... save a few bucks

Thanks to all.

All the best.
 
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Old 08-21-09, 10:01 AM
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I didn't say anything about other companies.
Ya did, sorta... one of the links you posted was from CENTRAL BOILER... and like rbeck said yer references showed different valves, etc...

The problem with using a reverse acting thermostat in order to overcome the NORMALLY OPEN valves is that the zone valve would need to be POWERED almost all the time, and that wastes electricity, and they aren't designed for that duty cycle. Most zone valves are designed for intermittent duty, meaning that MOST of the time, the power is OFF.

I'll go look up your valves now and see if you have any other options...
 
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Old 08-21-09, 10:10 AM
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I can't find anything that fits that model number on your valves. What other information is on the valve?

Are you in the US ?
 
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Old 08-21-09, 10:43 AM
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Originally Posted by hanspelmo View Post
Anyone knows what HG or HE means (orange wire)?
Changing that jumper will not change the 'action' of the thermostat. That jumper is for certain FURNACES that have a separate relay for the fan control. It is not for BOILERS.
 
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Old 08-22-09, 07:17 AM
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Ya did, sorta... one of the links you posted was from CENTRAL BOILER... and like rbeck said yer references showed different valves, etc...
Oh.... didn't realize that, sorry.

The problem with using a reverse acting thermostat in order to overcome the NORMALLY OPEN valves is that the zone valve would need to be POWERED almost all the time, and that wastes electricity, and they aren't designed for that duty cycle. Most zone valves are designed for intermittent duty, meaning that MOST of the time, the power is OFF.
You have a very good point !
They are only 6W, neverthless they are certainly not dessigned for close to 100% duty cycle.

I'll go look up your valves now and see if you have any other options...
Thank you for your trouble.
 

Last edited by NJT; 08-22-09 at 08:37 AM.
  #14  
Old 08-22-09, 07:19 AM
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inverted zone valeve

Thank you for your info, you are very kind.

I have a better idea now !

All the best to you !
 
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