Learning Thermostat Compatibility with Lennox Harmony II Zoning Controls on a Heat Pump

[OsterfeldBJ]

Moved into a new home and I would like to move up to the Learning Thermostat.  The current setup is a heat pump with backup electrical heat and dual zone control. (2 thermostats - 1 up/1 down)  It is a Lennox system from @ 2004 with the Harmony II zone controller. Equipment model numbers and thermostat wiring below.  Is there any way to wire this up to a Learning Thermostat without replacing the existing equipment?  I was thinking the * terminal may a solution because I have an O and B on the existing, and obviously can't shove two wires into one terminal on the Nest.

Thanks,

Brian

Air Handler	Lennox	CBX32MV-036-230-6-02
Aux Heater	Lennox	EC829(EH)-9CB-P
Heat Pump	Lennox	HPXB15-036-230-1

Wiring on Harmony II Thermostat

[Ryan_G]

Hi OsterfeldBJ,

Thanks for reaching out here in the Google Nest Community.

With the kind of HVAC system you're using, it is recommended to have a Nest Pro or your local HVAC technician to install the Nest Thermostat for you. 

Regards,

Ryan

[Jeran]

Hey there OsterfeldBJ,

Did you have any more questions or need any additional help? 

Thank you,
Jeran
 

[Jeran]

Hey OsterfeldBJ,

Did you have any more questions or need any additional help? If not, I'll go ahead and lock up this thread in 24 hours.

Just checking up,
Jeran