On Thu, 18 Dec 2003 13:31:42 +0000 (GMT), "Dave Liquorice"
wrote:

On Thu, 18 Dec 2003 12:05:05 GMT, Tony Bryer wrote:

This holiday feature isn't IMO very useful.

Check your household insurance - mine specifies (and i think
it is pretty common) that when the house is unoccupied that
the CH be left on a minimum temp - I think mine is 15 C.

Unless I've remembered wrongly the CM67 holiday setting
incorporates frost protection (5C?). 15C is IMO high for an
unoccupied property unless you have valuable antiques or
suchlike,

I'd also be surprised if ordinary household the insurance stated a
minimum temp. Keeping the property frost free is something else and
the TP75 when in holiday mode does that rather than always off.
Default is 6C I think but can be overridden.

You can set it to any value you like. My only gripe with it is that it
rather advertises to any burglar who might break in, just how long the house
is likely to be unoccupied.

It's not a feature I will use here, to much thermal lag. Did go away
one autumn before frosts set in and switched the heating off. Took 3
days for the place to stabilise again. Thick stone walls hold and/or
absorb a lot heat.

I once let a fairly modern brick-built house drop to about 10-11C. IIRC, it
took well over 24 hours of continuous heating before it even *felt* warm,
let alone measured anything reasonable. If I was to bother now (and I often
don't), I'd choose something nearer 15C, and have the holiday period end a
full day before I was expecting to return.

I have a Danfoss TP75. It does everything the OP wants, apart from the
set-any-day-to-one-of-two-profiles feature. I doubt any will do that,
though. My only real complaint is the proportional control insists on
over-shooting first. It does have a one-button time change facility too,
radio clock synching sounds a bit ott.

--
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