For Heat Pump Systems - Emerson Sensi Installation Manual

For Heat Pump Systems

Terminal Cross Reference
Old
thermostat...
RC
RH, R
C, X, B**
W, W1, W/E,
Aux/E, E
W2***
Y, Y1
Y2
G
O, B**, O/B
L
* If the old thermostat has separate RC and RH wires, clip the RC/RH jumper
on the back of the thermostat.
** Label "B" as "C" only if the old thermostat also had a wire on "O".
If there is no wire on "O" – label the wire "B".
*** On Heat Pump systems with separate W2 and E wires, label both wires W/E
(2 wires on one terminal).
Sensi
thermostat...
RC*
RH*
C
W/E
W2
Y
Y2
G
O/B
L
Heat Pump
Power for cooling
Power for heating
Common wire
1st stage aux/
emergency heat
2nd stage aux/
emergency heat
1st stage compressor
2nd stage compressor
Fan
Heat pump
changeover valve
Heat pump diagnostic