[cchav61590]

PLEASE need help-would like to change thermostat on my American Standard model WYC060F100AA heat pump. Current wiring on Honeywell T841A1712 thermostat is:

ZONE 1 THERMOSTAT
X- BLACK WIRE----COMMON
R- RED WIRE-------HOT
G- GREEN WIRE---FAN
W2-WHITE WIRE--2ND STAGE HEAT
B-BLUE WIRE------HEATING MODE
E-BROWN WIRE---EMERGENCY HEAT
Y-YELLOW WIRE---EQUIPMENT CALL
O-ORANGE WIRE--COOLING MODE

ZONE 2 THERMOSTAT
W1-WHITE WIRE------HEAT
RC-RED WIRE-----------HOT
RH-BLACK WIRE JUMPER TO RH
Y1-YELLOW WIRE-----COOL

ZONE 1 DAMPER
M1-RED WIRE
M2-WHITE WIRE
M4 BLUE WIRE

ZONE 2 DAMPER
M1-ORANGE WIRE
M2-YELLOW WIRE
M4-BLACK WIRE

TERMINAL CONNECTION INSIDE HEAT PUMP
COMMON-C-BLUE WIRE
HOT-R- RED WIRE
COMPRESSOR-Y- YELLOW WIRE
FAN-G- GREEN WIRE
CHANGEOVER VALUE(HEAT)-B-NOT USED
CHANGEOVER VALUE (COOL)-O-ORANGE WIRE
2ND STAGE HEAT-W2-BLACK & WHITE WIRE
2ND STAGE COOL-Y2-NOT USED
--------------------------------------------------------------------
24 VAC 40VA (1)-RED WIRE
POWER SUPPLY(2)-BLACK WIRE
----------------------------------------------------------------------
ZONE 1 THERMOSTAT
COMMON-CX-BLACK WIRE
HOT-R-RED WIRE
EQUIPMENT CALL-Y-YELLOW WIRE
FAN-G- GREEN WIRE
HEATING MODE -B-BLUE WIRE
COOLING MODE-O-ORANGE WIRE
EMERGENCY HEAT-E-BROWN WIRE
2ND STAGE HEAT-W2-WHITE WIRE
2ND STAGE COOL-Y2-NOT USED


New thermostat Lennox T8611G has: R,C,Y,B,L,X1,X2,G,E,W2 & O
QUESTION? Should my connect be :
OLD TSTAT-----------------------------NEW TSTAT
X-BLACK WIRE------:confused:----------- C- BLACK WIRE
R- RED WIRE------------------------- R- RED WIRE
G- GREEN WIRE---------------------- G- GREEN WIRE
W2- WHITE WIRE---------------------- W2- WHITE WIRE
B-BLUE WIRE--------:confused:------- X- BLUE WIRE
E- BROWN WIRE--------------------- E- BROWN WIRE
Y- YELLOW WIRE -------------------- Y- YELLOW WIRE
O- ORANGE WIRE-------------------- O- ORANGE WIRE

Would like to do away with ZONE 2 THERMOSTAT because area it is used in is just one open loaf that is open to great room. How do I go about this change? And making sure that damper is opening with ZONE 1 DAMPER
Thank you in advance for any and all assistance with this task!
Charles

[hvac1000]

Hello Charles. You have just walked into a hornets nest. STOP what you are doing and reconsider this.

First it takes a seasoned professional to figure out most zoning systems and yours is compounded by the fact that it is a heat pump.

Second is the fact that you have three wire dampers and they can be stinkers to work with. These work with a common wire and power wires for both open and closing. Usually the brand is Trol-A-Temp by Honeywell.

Third and most important is a warning about the magic smoke. All it takes is one wire located to the wrong connection and your system will let out the magic smoke. If this happens be ready for a HUGE repair bill since most of the controls and wiring will be destroyed.

Since I am not there to actually oversee the situation and since trying to do this on a message board is just about impossible I am passing on the above information.

That is not to say that you may get lucky and all works correctly when you are done but personally I want no part of this since my past experiences with message boards have left me with the conclusions above. I have personally wired many zoning systems and most were far more complex than the one you have but I had a advantage of having all the control circuits,equipment details etc on site while doing the work. This type of work is hard to do by remote control if you know what I mean.

I wish you good luck in your endeavors and here are a few links to some of your zoning toys.

http://www.bayareaservice.com/Manual..._prod_data.pdf

http://www.bayareaservice.com/Manual..._prod_data.pdf

http://www.bayareaservice.com/Manual...all_manual.pdf

[cchav61590]

[QUOTE=hvac1000;1928331]Hello Charles. You have just walked into a hornets nest. STOP what you are doing and reconsider this.

Good thing I looked before I leaped,especially when there is a hornets nest with magic smoke at the bottom. Thank you for your answer.. Question can I leave system as is and add new thermostat in place of old thermostat 1.
New thermostat Lennox T8611G has: R,C,Y,B,L,X1,X2,G,E,W2 & O
QUESTION? Should my connect be :
OLD TSTAT-----------------------------NEW TSTAT
X-BLACK WIRE----------------- C- BLACK WIRE
R- RED WIRE------------------------- R- RED WIRE
G- GREEN WIRE---------------------- G- GREEN WIRE
W2- WHITE WIRE---------------------- W2- WHITE WIRE
B-BLUE WIRE--------------- X- BLUE WIRE
E- BROWN WIRE--------------------- E- BROWN WIRE
Y- YELLOW WIRE -------------------- Y- YELLOW WIRE
O- ORANGE WIRE-------------------- O- ORANGE WIRE
Will this work?

[hvac1000]

While it is possible to do that my warning still stands. When you are dealing with the type of system you have sometimes the wiring will just not work out.

As long as X is common for sure and

B is first stage heat it might work BUT

These terminals might work the dampers or other relays or end switches. This is something we do not know. If you really have to do it at your own peril.

[cchav61590]

[QUOTE=hvac1000;1928765]While it is possible to do that my warning still stands. When you are dealing with the type of system you have sometimes the wiring will just not work out.
Thanks again: I will take your advice and hire a pro because the risk is not worth the gain.

[hvac1000]

Smart move. This way if they mess it up they get to fix it for free.