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Sensi Touch 2 smart thermostat | MANUAL OPERATION GUIDE
INSTALLATION
See below for definitions of the wiring terminals on the sub-base of the thermostat.
Terminal outputs and wiring diagrams
TERMINAL LABEL DEFINITION
RH*
Power for heating, 24V
RC*
Power for cooling, 24V
C**
Common wire, 24V
G
Indoor blower (fan)
Y
First outdoor stage cooling on conventional systems or
first heat and cool on heat pump systems
Y2/*
Second outdoor stage cooling on conventional systems or
second heat and cool on two stage heat pump systems
W/E
First indoor stage heat on conventional systems or first stage
auxiliary/emergency heat on heat pump systems
W2/*
Second indoor stage heat on conventional systems or second stage
auxiliary/emergency heat on heat pump systems/Dehumidifier
O/B
Changeover (reverse valve) connection for heat pump or zone panel systems
ACC-
Used to control a whole home humidifier with two wires and
setting the dry contact switch on the back to accessory.
ACC+
Used to control a whole home humidifier using a single wire. Make
sure the switch on the back is in the
System
position
* 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.
**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.
