On Wednesday, February 24, 2021 at 2:15:09 AM UTC-6, micky wrote:
In alt.home.repair, on Tue, 23 Feb 2021 14:26:28 -0500, Tekkie©
wrote:


On Sat, 20 Feb 2021 03:05:37 -0800 (PST), Alexandre Verri posted for all of us
to digest...


I bought a house in Ireland two years ago and I still have some doubts about how the heating system controls should work.

My house has one thermostat and also a programmable mechanical timer. This is what I refer here as the control system. The actual behaviour of the control system is:

Regardless of the programmed timer, if the room temperature is less than the temperature set on the thermostat, the boiler and pump start working to heat the house.

If the room's temperature is bigger than the temperature set on thermostat and the timer fires, the boiler and pump start working to heat the house.

It seems a strange behaviour, this is not what I would have designed. I would prefer the following:

If the room's temperature is less than the thermostat and the timer fires, the pump and boiler should start working.
It's conceivable that they put the parts together wrong Conceivable,
but very unlikely. It coudl be that the timer should control the pump
and boiler like you want, though I'm not sure what would happen when
tthe timer is ... off, is that the other setting? Would the house get
really cold if the timer were off and that stopped the boiler from
working. Or does the timer somehow change the temp setting like one of
the ansers though could be the case.

Be absolutely sure you have a totally understandable drawing of how it
is connected now so you can put it back that way when you realize you've
made it worse. But maybe you'll make it better.

Don't depend on your memory. It's amazing how easy these things are to
forget in only a few minutes.

agree
track original and changes. carefully
i always forget and then I am sorry

pax vobiscum

mk5000


You tell me mistakes
Are part of being young
But that don't right
The wrong that's been done-
Brenda Lee