I recently purchased a Honeywell RTH7500 to replace a Trane Baystat240.
I have a multistage electric heatpump and A/C. I was about to call my
local HVAC contractor to install it, when I had the idea of at least
reading the manual first and seeing how complicated the install would
be. The manual left me feeling like I could do it. (after all I am
not completly ignorant - just mostly). The wiring diagram looked
straight forward, this is what I came up with:


Baystat240 - Honeywell
red (R) - R
black (T) - not used
Orange(O) - O
Green (G) - G
Yellow(Y) - Y
Brown (X2) - E
Blue (B) - C
White (W) - Aux


Seemed real simple - and the problem that resulted seems like it may be
real simple: When the heat is on the thermostat - I get ac, and when
the ac is on I get heat. Is it time to follow my first instinct of
calling someone - or is this a simple silly-ass problem?


Thanks for the help

wrote in message
ups.com...
I recently purchased a Honeywell RTH7500 to replace a Trane Baystat240.
I have a multistage electric heatpump and A/C. I was about to call my
local HVAC contractor to install it, when I had the idea of at least
reading the manual first and seeing how complicated the install would
be. The manual left me feeling like I could do it. (after all I am
not completly ignorant - just mostly). The wiring diagram looked
straight forward, this is what I came up with:


Trane's a piece of garbage.

SOME of their equipment needs an interface board to be able to install a
'standard' thermostat. What's the model number of the equipment?


Baystat240 - Honeywell
red (R) - R
black (T) - not used
Orange(O) - O
Green (G) - G
Yellow(Y) - Y
Brown (X2) - E
Blue (B) - C
White (W) - Aux


Looks like you have a heat pump....

wrote:
I recently purchased a Honeywell RTH7500 to replace a Trane Baystat240.
I have a multistage electric heatpump and A/C. I was about to call my
local HVAC contractor to install it, when I had the idea of at least
reading the manual first and seeing how complicated the install would
be. The manual left me feeling like I could do it. (after all I am
not completly ignorant - just mostly). The wiring diagram looked
straight forward, this is what I came up with:


Baystat240 - Honeywell
red (R) - R
black (T) - not used
Orange(O) - O
Green (G) - G
Yellow(Y) - Y
Brown (X2) - E
Blue (B) - C
White (W) - Aux


Seemed real simple - and the problem that resulted seems like it may be
real simple: When the heat is on the thermostat - I get ac, and when
the ac is on I get heat. Is it time to follow my first instinct of
calling someone - or is this a simple silly-ass problem?


Thanks for the help

And if it is a heat pump, that requires a thermostat specially made for
pump.

wrote:
I recently purchased a Honeywell RTH7500 to replace a Trane Baystat240.
I have a multistage electric heatpump and A/C. I was about to call my


I can't help you with your problem of heat/ac switched, however I also
have a multistage electric heatpump and A/C with auxilliary heating. I
don't think the RTH7500 is compatible with this system. So, that might
be your problem right there. I installed a Honeywell CT3611R that
works great with my system. I am VERY un-handy with this sort of
thing, but I managed to install it myself and it works. When I later
had my heat pump/furnace replaced, I had the guy check the thermostat
and he said it was all correct.

Good luck!
Lisa

I actually got it working. Just a matter of entering the right code
for the type of system I have on the installer setup options on the
thermostat. All is well and my house is comfortable!!

Thanks