Installation - Sensi PRO Installation Manual

Installation

1. Install Sensi thermostat, referring to these terminal
definitions, cross references and wiring diagrams as needed:
OLD
THERMOSTAT
RH
RC, R
C, X, B**
Y, Y1
Y2
W, W1, W/E,
Aux/E, E
W2
†††
G
O,B, O/B
††
L
†
Two transformer systems (separate RC and RH wires), clip internal jumper located
on back of Sensi above battery compartment.
††
Label "B" as "C" only if the old thermostat also had a wire in "O" . If there is no wire
on "O"-label the wire "B" .
†††
On Heat Pump system with separate W2 and E wires, label both wires W/E
(2 wires in one terminal).
6
SENSI
THERMOSTAT
RH
†
RC
†
C
Y
Y2/*
W/E
W2/*
G
O/B
L
CONVENTIONAL
SYSTEM
Power for heating, 24V
Power for cooling, 24V
Common wire, 24V
1st stage cool
2nd stage cool
or humidifier
1st indoor stage heat
2nd indoor stage
heat or dehumidifier
Indoor blower (fan)
Changeover (reversing valve) connection
for heat pump or zone panel systems
no function
HEAT PUMP SYSTEM
1st outdoor
stage heat
2nd outdoor stage
heat and cool
or humidifier
1st stage auxiliary/
emergency heat
2nd stage auxiliary/
emergency heat
or dehumidifier
"L" terminal
connection