Installation Manual

Supported Wiring

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Nest Thermostat E Connectors 

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Conventional connectors:

Heat pump connectors:

Y1

Stage 1 compressor relay

Y1

Stage 1 compressor relay

G

Fan relay

G

Fan relay

R

24VAC power from heating/cooling

transformer*

R

24VAC power from heating/cooling

transformer*

W1

Stage 1 heat relay

W1

Stage 1 heat relay, Aux heat, Emergency heat

C

24VAC common wire

C

24VAC common wire

*/OB

Stage 2 heat (W2), Stage 2 cool (Y2)

*/OB

Changeover valve relay (Stage 1)

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* No jumper wires required. You don’t need to hang on to any old jumper wires going from Rh (sometimes just called R) to Rc. Nest will

automatically jump these two connectors. Nest Thermostat E does not work with dual transformer systems.

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