RE: Macros and Timers

["James Hoye" <james.hoye@xxxxxxx>]

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> Also was looking at using an electric heating valve (Screwfix :-)
> url - http://www.screwfix.com/product.phtml?4954)
to turn my garden
> water on and off, has anyone any experience of doing this? what sort
> of control does this need, I presume it is not as simple as apply
> power, valve open, turn power off valve shut?)

Ah another convert(!)

Ian Bird is doing the same thing using RS Components 12v valves at 9 quid
or
so a piece (using HomeVision).  I think for a 2 port valve, it is as simple
as ON=OPEN and OFF=CLOSED (the 3 port mid position ones are trickier as
there are 5 wires!).

The only problem is that the CH valves might not be able to handle mains
water pressure (my 3 port valve is in a gravity fed system with a CH pump).
Also, the fittings are 22mm so you would have to use reducing couplings
http://www.screwfix.com/product.phtml?4740
to change up from 15mm and back
down again.  If you do this you will need a short section of 22mm copper
tube - I have a spare foot or so and for a pint could solder the reducers
on
and leave you with a 15mm tail at each end you could join with compression
fittings (that's if you can't/don't want to solder yourself!).

James H




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Automated Home UK
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