On Fri, 24 Feb 2006 16:33:14 GMT, LDC
wrote:

On Fri, 24 Feb 2006 15:46:34 GMT, "Tomes" wrote:


Using made up numbers, the stat would only come on if it could get a full
10 minute or longer "on" cycle, So while the program setting changes at
11:00, the latest the unit would come on would be 10: 50. If the unit was
already running at 10:50 it would continue to run as long a necesary up to
11:00. If the unit was off at 10:50 it would anticipate the 11:00 change
and would not start an "on" cycle..



.... and this is exactly the same as setting it to 10:50. Really, it is.
The same things are happening at the same times.
Tomes

Of course it is not the same as moving the shut off time up 10 minutes..
Because now you get the short cycle at 10:47. OP wants to avoid the
unnecessary short cycle, not move it earlier.

My thermostat (a RCS remote-controllable unit) avoids short cycles,
but in a slightly different way. It just does not turn off the heat
until a minimum time has expired. This may cause it to run a little
past the setback time. It also assures the minimum off-time for an AC
compressor.

--
Mark Lloyd
http://notstupid.laughingsquid.com

"Democracy is two wolves and a lamb voting on what
to have for lunch. Liberty is a well armed lamb
contesting the vote." - Benjamin Franklin