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hanspelmo · Aug 20, 2009, 08:05 AM

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:

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

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

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

Please help !

Thanks

hvac1000 · Aug 20, 2009, 03:40 PM

The Erie part numbers you provided are incorrect and not listed by Erie. Post correct model numbers.

hanspelmo · Aug 20, 2009, 04:40 PM

This is what is written on it.

You can see photo here:

http://s652.photobucket.com/albums/uu250/hanspelmo/?action=view&current=SDC10152.jpg

Thanks

hvac1000 · Aug 20, 2009, 06:42 PM

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

Correct as long as the wiring is correct. I have never run into a zone valve that would stay open all the time and only close on a call from the thermostat.

Usually the thermostat will call for heating and the zone will open allowing the hot water to flow. There is also a end switch that will make during the valve opening to bring the boiler on line.

You could use relays to reverse control the valves BUT I am not a great believer in engineering a system that way. Best for you to just replace the valves with the proper ones and call it a day.

The company that replaced the boiler should have taken care of this while they were there.

hanspelmo · Aug 21, 2009, 07:10 AM

Yes, I though of inverting with relays, but, as you say, it would not be great engineering.

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

But it is simpler to change the valve in my case.

Thank you for the info !

hvac1000 · Aug 21, 2009, 07:21 AM

Overall it will be simpler to change them. Then you have somewhat of a standard system in case you want to do set back thermostata etc.

What kind of system was originally installed that needed reverse acting valves?

hanspelmo · Aug 22, 2009, 06:22 AM

Originally Posted by hvac1000

Overall it will be simpler to change them. Then you have somewhat of a standard system in case you want to do set back thermostata etc.

What kind of system was originally installed that needed reverse acting valves?

It was a gaz boiler, the zone valves were installedd but not operational.

(Thay were open anyways)

Took the work from there.