See below for definitions of the wiring terminals on the sub-base of the thermostat.
Wiring Terminals
Sensi
TM
Wi-Fi Programmable Thermostat
|
MANUAL OPERATION
7
TERMINAL OUTPUTS AND WIRING DIAGRAMS
* If the old thermostat has separate RC and RH wires coming out of the wall, clip
the RC/RH jumper on the back of the thermostat above the battery compartment.
**The common wire could be labeled “C” on your old thermostat, or it could be
labeled “B” or “X.” Please refer to the owner’s manual of your old thermostat
for clarification.
DOES WIRE COLOR CORRESPOND TO THE THERMOSTAT TERMINALS?
Wire color does not always correspond to the thermostat letters. A white wire may be
attached to the “W” terminal on the old thermostat, or it may be attached to a different
terminal with a different letter. Be sure to take a photo of the old thermostat that shows the
wire colors and terminal letters before labeling and removing any wires.
RH*
Power for heating, 24V
RC*
Power for cooling, 24V
C**
Common wire, 24V
Y
First outdoor stage cooling on conventional systems or first heat and cool on heat pump systems.
Second outdoor stage cooling on conventional systems or second heat and cool on two stage
heat pump systems.
First indoor stage heat on conventional systems or first stage auxiliary/emergency heat on
heat pump systems.
Second indoor stage heat on conventional systems or second stage auxiliary/emergency heat
on heat pump systems.
Y2
W/E
W2
G
Indoor blower (fan)
O/B
Changeover (reversing valve) connection for heat pump or zone panel systems
L
Heat Pump system, “L” wire connection.
Terminal Label
Definition
