RE: Heating Question

["Mick Furlong" <hiltoneltd@xxxxxxx>]

Stuart

 

sounds interesting, where are these units available from?

 

Thanks

Mick

 

-----Original Message-----
From: Stuart Poulton [mailto:swp@xxxxxxx]
Sent: 25 February 2002 11:22
To: ukha_d@xxxxxxxSubject: RE: [ukha_d] Heating Question

Kevin,

Thats basically what I'm looking at, there are replacement units for
TRV, that replace the thermostatic knob, with on containg an
electrically heated core, takes about 4 minutes go from fully on to
fully off.

Stuart


On Mon, 2002-02-25 at 11:16, Kevin Wood wrote:
> I have heard (haven't got round to trying it) that a low cost way of zoning
> off a heating system with TRVs is to strap a small resistor to the valves
> you want to control and dissipate a few watts of power in the resistor. This
> artificially increases the temperature of the TRV by a few degrees and
> causes it to cut off the flow of water early.
>
> I would imagine this doesn't give you the on/off control you'd get with a
> motorised valve but could be useful for reducing the temperature of certain
> "zones" to a "set back" temperature when not occupied. Perhaps coupled with
> a PIR in the room concerned. The degree of "set back" can be adjusted by
> varying the power into the resistor. Could even automate that if you fed the
> resistor with a PWM signal.
>
> It has a few advantages, notably cost, the fact you don't have to drain
> plumbing, etc. and it's easy to restore the system to it's original state.
>
> SWMBO probably wouldn't even notice.
>
> Kevin




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