Good morning, all y'all. Hope you can give me a hand here.
I'm in the midst of economically devasted Michigan, and
am affiliated with a local religious group.
Their building is used for services just once/week, with
no occupancy otherwise.
About a decade ago they hooked up a Chronotherm III to control
both the heating and the air conditioning. (Back then the
building was also used a lot more, but since this is Michigan,
there just ain't so many people around now).
I've found the basic instructions on line so have been
able to set the unit to 45 or 50 degrees six days, and bring
it up on the day it's needed. But...
but... there are "hard limits", so to speak, for some
of the days/times.
For example, I'd like to set the building to 75 degrees,
and I can do that for the 9 am, noon, and 9 pm choice,
but when I try punching that in for 4 pm, the numbers
stop at 65 degrees.
I figured out how to reset the various time choices, so
for now I've moved the 9 pm toggle to 4:10 pm, but I'd
really like to do this right.
I've run into a similar problem with the "low" setting. I'd
like to let the building cool down to 40 degrees (enough
to keep the pipes from freezing, with some leeway), but
it won't go under 45 for most slots, and 50 for others.
There are only a couple of HVAC shops within an hour of here,
and I've swung by both. The techs there scratched their heads
and couldn't help.
They offered to swing by and install a New Thermostat!!!,
and gave a decent price if I could wait a bit until
they had a call in the area [a]. But I'm hoping someone
can point out to me how to work with what we've got.
(As you can well imagine, not much money here).
[a] to be fair about it they were pretty honest and professional
Knowledge may be power, but communications is the key
[to foil spammers, my address has been double rot-13 encoded]