Re: HomeVision control of Central Heating

[Nigel Orr <nigel.orr@xxxxxxx>]

At 13:24 21/10/99 +0100, you wrote:

>both of these contacts to live, as appropriate. The room thermostat in
>my case was wired in series with the timer's central heating control.
>Thus both the timer and the thermostat have to be on for the central
>heating to run.

That's the normal way.

>I've wired mine so that I've left the original timer controls intact on
>the boiler and wired Comfort in parallel with the timer. The thermostat
>now connects directly to Comfort as an input zone. Thus you can
manually
>switch the heating or hot water on via the old timer controls, or you
>can set Comfort to switch it automatically depending on time of day,
>house occupancy, and the thermostat input.

It might be good to keep a normal mechanical room thermostat in place, as
an override, set to 25 deg C, or something.  Just in case there is a
problem when you are away on holiday and it keeps the heating on full all
the time...

A small point, and hopefully it will never be a problem, but it would be
'good practice' if you get the chance to do it.

Nigel


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