Re: Electric valve for radiators

["Frank Mc Alinden" <fmcalind@xxxxxxxxxxxxxx>]

Hi Mike / Neil
Clipsal make a 4 channel analogue output module which
they use for electronic dimmable  ballasts  (0 to 10v dc) would this be
suitable for the modulating type valve...????
HTH
Frank
----- Original Message -----
From: "mike" <mikegriff@xxxxxxx>
To: <ukha_d@xxxxxxx>
Sent: Saturday, February 14, 2004 9:48 AM
Subject: RE: [ukha_d] Electric valve for radiators


> All these questions so little time
>
> I jest ! :0)
>
> Thanks for the swift reply
>
>
>
> In my new extension I want to try zone heating via either Comfort /
> Homevision / or C-bus relays
>
> Controlled by HomeVision's temp sensors.
>
>
>
> At the present I can either switch DC or Mains
>
>
>
> The logic would go
>
> x + required temp
>
> If temp <x - 1
>
> Turn relay on
>
> If temp >x
>
> Turn relay off
>
>
>
>
>
> My concern is sourcing a motorised/solenoid valve that is rated within
the
> highest temp limits that a central heating boiler can reach
>
>
>
> I'm afraid Neil my knowledge of modulating valves unless they are the
type
> you put in old Amps is Zero!!
>
>
>
> I'm assuming that as long as I leave a couple of Rads always connected
> without valves to the boiler then a single two port valve to each
radiator
> will do
>
>
>
> If you can source the valves then brilliant - a pint or two at UKHA
2004
:-)
>
>
>
> Thanks
>
> Mike
>
>
>
>   _____
>
> From: Neil Fuller [mailto:neil@xxxxxxx]
> Sent: 13 February 2004 20:27
> To: ukha_d@xxxxxxx
> Subject: Re: [ukha_d] Electric valve for radiators
>
>
>
> > I'm looking for some electric controlled valves to control some
> > radiators
>
> How do you want to control these valves?
>
> Will they be open/close or modulating?
>
> If they are Open/Close, is the control voltage 24v or 230v
>
> If they are modulating, will it be 0-10v or 4-20mA?
>
> You can also "modulate" the valves using 3 wire or
"raise/lower" control.
>
> There are plenty of 2 port, 15mm valves and actuators suitable for
LTHW
> available from people like Sauter, Honeywell or Trend/Danfoss amongst
> others.
>
> Typical costs are GBP10 - 15 for the valves and GBP20-40 for the
actuators
> depending on signals.
>
> Let me know what you want to do with them and how many and I'll sort
out
> costs.
>
> Ohh Ohhh! - Bulk Buy!!!????
>
> Regards
>
> Neil
>
> ----- Original Message -----
> From: "Mike Griffiths" <mikegriff@xxxxxxx>
> To: <ukha_d@xxxxxxx>
> Sent: Friday, February 13, 2004 6:14 PM
> Subject: [ukha_d] Electric valve for radiators
>
>
> > Can anyone help
> >
> > I'm looking for some electric controlled valves to control some
> > radiators
> >
> > These are not going to be placed instead of the  normal valves
but in a
> > cupboard very new to them
> >
> > I have found some on the Radiospares site but I'm not sure that
they are
> > rated for hot water
> >
> > Thanks in advance
> >
> > Mike
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
> >
> >
> > UK Home Automation Meet 2004 - BOOK NOW!
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> >
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>
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