RE: Electric valve for radiators

["mike" <mikegriff@xxxxxxxxxx>]

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



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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]
>
>
>
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