Your logic is partially correct. I would leave the ac on a higher temp for a
weekend, shut it down on longer trips.
I dont go down the basement daily, and my old system had flooded a bit
before I discovered the problem. It wasnt a big deal.
As for the furnace,
If I cut off the furnace with the overflow switch, you are right, the
humidifier wont run either, but I risk frozen pipes.
If I cut off the humidifier solenoid, and the pump fails, the furnace will
continue to run, generating condensate and cause a minor acidic flood.
Right, we've beaten this thread to a pulp.
--
Rick

"Stormin Mormon" wrote in message
...
Well, from what I read of this snarl, it sounds like you don't want the
humidifier draining water into the condensate pump if the funace is dead,
and the house is cold.

On the humidifiers I've wired, the water valve is controlled in part by
the
blower fan of the furnace. So, if the furnace isn't running, the
humidifier
won't get any water. In short, it's a non issue. If the furnace isn't
warm,
it won't be blowing. If it's not blowing, the water won't be flowing.

You can switch the AC, if you want. That's easy enough. But I wouldn't
bother to leave the central AC turned on if I wasn't home. Another non
issue.

Have I been a bit reassuring? Hope so!

--

Christopher A. Young
Learn more about Jesus
www.lds.org
www.mormons.org
.
.

"Rick" wrote in message
...
I have a newer Rheem RGRA gas furnace with a Rheem A/C controlled by a
Honeywell T8600D thermostat, and an Aprilaire 760A humidifier. I would
like
to use the condensate pump's cutoff switch to shut down the A/C and the
humdifier water supply, but not the furnace, to avoid a freeze condition.
How can I wire the system to work? The alt.hvac guys were less than
helpful.
Thanks.
--
Rick