Siemens 3 way central heating valve connections
H. Neary
Has anyone details of what the wires actually do on these
valves. I bought one branded Wickes but cannot find a simple diagram
that shows what wires should be energised for the three valve states.
I do not wish to use a controller, just a simple bit of relay logic to
operate the thing.
HN
cj
Simply these valves are normally just an electric motor which has 2 wires
and one or more micro-switches which are used in conjunction with the 'stats
pump & boiler.
These vary from valve type due to spec' but normally have 3 wires
com/Normally open/Normally closed rated at 240v in most cases but again
check the spec'.
Finally an earth wire.
This gives on the more common valves 6 cores.
Colour varies but in most UK made valves brown & blue are motor green/yellow
earth, white grey and orange switch.(again the included spec should give the
colour code.
The thing to note is that the motor is energised all the time when the valve
is open so you only need to put power to the motor wires to make it work .
In the olden days this was fed via the room stat and no other connections
were used but don't try it today .
You can find all the different wiring configurations on line and others on
group will probably have a link.
HTH
CJ
"H. Neary" <���nearyh���@clara.co.uk> wrote in message
news:oe1306pkuc5hg5ba5...@4ax.com...
ARWadsworth
H. Neary
Many thanks Adam
You cannot imagine how grateful I am for your assistance. I have spent
hours trawling the internet and all I came up with was the Siemens PDF
which gives no clue to a none plumbing person as to what the valve
actually does.
Again Many Many thanks for your help.
HN
ARWadsworth
"cj" <m...@here.com> wrote in message
news:wrCdnZBp8r-eNpzR...@bt.com...
> Hi
> Simply these valves are normally just an electric motor which has 2 wires
> and one or more micro-switches which are used in conjunction with the
> 'stats pump & boiler.
> These vary from valve type due to spec' but normally have 3 wires
> com/Normally open/Normally closed rated at 240v in most cases but again
> check the spec'.
> Finally an earth wire.
> This gives on the more common valves 6 cores.
> Colour varies but in most UK made valves brown & blue are motor
> green/yellow earth, white grey and orange switch.(again the included spec
> should give the colour code.
> The thing to note is that the motor is energised all the time when the
> valve is open so you only need to put power to the motor wires to make it
> work .
> In the olden days this was fed via the room stat and no other connections
> were used but don't try it today .
Actually, there are 2 port valves that operate the opposite way. They are
used on solid fuel heating systems and the power is applied to close the
valve. It is a fail safe in the event of a powercut.
Cheers
Adam
ARWadsworth
http://wiki.diyfaq.org.uk/index.php?title=Central_Heating_Controls_and_Zoning
May also be of help to you.
Cheers
Adam
Andrew Gabriel
I am controlling one from a computer. IIRC, I'm using two 2-pole
changeover relays to effectively get independant control of each
output. I can try and find the circuit if you're interested.
These things are cleverly and minimally designed to be controlled
by simple heating controls, and it can be fiddly to use them in
other situations, but by no means impossible.
--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]
Peter Andrews
"Andrew Gabriel" <and...@cucumber.demon.co.uk> wrote in message
news:htvtoh$psf$1...@news.eternal-september.org...
I've been using a valve motor to open and close my greenhouse window for at
least ten years!
Peter