View Full Version : Inverted zone valve
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/dd118/JeffPicks/tstat_wiring.jpg?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¤t=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
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.