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

OsterfeldBJ
Community Member

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 HandlerLennoxCBX32MV-036-230-6-02   
Aux HeaterLennoxEC829(EH)-9CB-P
Heat PumpLennoxHPXB15-036-230-1

 

Wiring on Harmony II ThermostatWiring on Harmony II Thermostat

3 REPLIES 3

Ryan_G
Community Specialist
Community Specialist

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
Community Specialist
Community Specialist

Hey there OsterfeldBJ,

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

Thank you,
Jeran
 

Jeran
Community Specialist
Community Specialist

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