Nest Thermostat Wiring Question

[Súpernazareth]

I have an almost new Carrier Heat Pump that came with an electric back up heating.   I wanted to upgrade the thermostat and I am installing a Nest Smart Thermostat.  As per the compatibility check, the thermostat is compatible but there are Y, O, W2, R, G and C wires connected to the old thermostat. The Nest Thermostat that I wanted to use doesn’t have a slot for the W2 wire.  I has slots for Y, C, W, G, R  and one identified as *OB.  I am planning to connect the Y wire at the Y slot, the R wire at the R slot, the G wire and the G slot and the C wire at the C slot. 

Shall I connect the W2 wire at the W slot and the O wire at the *OB slot?

Old Thermostat Wiring Picture

Nest Thermostat Slots Picture

[HVAC]

You need the nest leaning thermostat the one you have is for 1 stage heat. If you connect the wire to W you might have the heat pump & back up heat stage come on at the same time. Good luck. 

[Súpernazareth]

Thanks a lot for responding.  I really appreciate your help.

[zoeuvre]

Hi folks, 

@Súpernazareth, awesome! I'm glad that everything has been sorted out. If you have questions or concerns in the future, feel free to start a new thread, and we'll be happy to help.

I appreciate your help, @HVAC. 

All the best,

Zoe