RE: Re: X10 Relay Switch for boiler

["Hawes,Timothy Edward \(GEG\)" <haweste@xxxxxxxxxxxxxxx>]

> -----Original Message-----
> From: steve@xxxxxxx Sent: 12 November 2004 14:06=20
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> --- In ukha_d@xxxxxxx, "Hawes,Timothy Edward \(GEG\)"
> <haweste@a...> wrote:
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> > How much is "a lot of money" ? You should be able to
get a=20
> reasonable=20
> > > electronic programmer for under 40 quid
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> OK, so it wasn't that much money (although considerably more than
> =A340) I just want to "automate it" :-)

That's no problem - I just thought I'd mention that a (basic) programmer
mi=
ght be worthwhile if you ever get a problem with your own controls :-)
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> I have the wiring diagram...
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> http://www.tedsoft.co.uk/diagram.gif
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> Am I right in thinking I could just fit a appliance module to=20
> L an N and have the output going to 2? Or have I just blown=20
> myself up? :-)

Unfortunately this is where my detailed knowledge of an X10 module ends.
On=
that basis, what I'd do would be to connect the output of the appliance mo=
dule to the coil of a 240V AC-coil relay, and connect one set of contacts
f=
rom the relay to points 1 & 2 on your diagram. This presents a
"volt free" =
contact to your boiler, similar to the contacts in the room & frost
stats (=
i.e. a simple switch contact).

I see others have commented on wiring a module in directly, but while my
me=
thod may be more involved and use more parts, there's no danger of putting
=
240V into the boiler at the wrong place, since it uses the boiler's own
"co=
ntrol circuit voltage" to sense whether to turn on or not.
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> Luckily I'm not going to be doing it myself, I just want to=20
> know which bits to buy...

I know what you mean. Messing around with 12/24V is one thing, 240V always
=
makes me think twice :-o
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> Cheers
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> Steve

Cheers,

Tim H.

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