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RE: Re: X10 central heating control
This
is something I plan to do, but unless you have a dedicated controller such
as
Homevision, or a way ensuring 99.99% reliability for the PC controlling it,
you
should make sure you have a way of reverting it back to "time switch
control"
Consider the scenario:
You go
out to work, and the house has a power cut, the PC falls over, (or if
you're
lucky the UPS powers it down).
The
power is restored to your house.
The
central heating will now be off until you come home. and one cold house it
will
be in the winter!!
I
was
looking at a way of switching between the traditional time switch in the
house
and X10 control, using some logic, so that if the power to the house goes,
then
the heating will revert to using it usual timer.
My
time switch does just act as 2 relay switches for the heating and water, so
this
should not be a big problem.
Anyhow
just thought I would share my thinking.
Regards
Daniel
(There
is only one thing worse than coming home to a cold house.... a cold
SWMBO!!!!)
--- In ukha_d@y..., "James
Hoye" <james.hoye@s...> wrote:
>
> Once you have an
understanding of what system/configuration you
have, it
> becomes
a
little easier as the basic concept is pretty much the
same and
>
usually open to automation. The simplist approach would be if you
have a
> programmable timer somewhere - these usually switch a HW
and CH
circuit
> (either at 230v or sometimes 12 or 24v) and are
the
place to
start. Some
> systems only allow HW or HW _and_ CH
(ie. not CH on its own) - so
beware!
I've been looking at this
area
too, since I've been getting my
heating system upgraded. I'd
planned
to do most of it myself, but
not having done any plumbing before I got
a
local guy in to do all
the radiators, zone valves etc.
The
controller, as somebody said, is just a fancy time switch. All
the
"intelligence" is hard wired into the circuits through the
thermostats
and
zone valves - very ingenious stuff!
Anyway, the heating and water
are
simply switched on by a 230V line
from the controller, so I should be
able
to put a couple of appliance
modules in parallel with them for
computerised control.
The controller can be left as a backup in case
of
failure, or can do
most of the running, with the AM's used for frost
prevention. I
haven't decided exactly how I'll set it up yet, but
it
has a lot of
possibilities.
David
P.
For
more information: http://www.automatedhome.co.uk
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