Installation Manual

Sensi
™
Wi-Fi Programmable Thermostat Installation Guide 13
Notes
Single Stage or Mul-Stage System (No Heat Pump) with Two Transformers
*Two transformer systems (separate RC and RH wires), clip internal RC/RH jumper, located on back of thermostat above battery compartment.
HOT
HOT
NEUTRAL
24 VAC
120 VAC
HOT
120 VAC
NEUTRAL
NEUTRAL
24 VAC
HOT
Single
stage
AC1
GA1
EL1
24 Volt
(Hot)
Cool
24 Volt
(Hot)
Heat
24 Volt
(Common
)
Cool
Mode 1
st
stage
No
output
Heat
Mode 1
st
stage
No
output Blower /
circulator fan
energized on
call for cool
(and heat if
configured
for electric
heat)
O
Energized
constantly
in Cool
Mode
B
Energized
constantly
in Heat
Mode (or
Aux Mode)
Heat Pump
“L” terminal
connection
Multi -
stage
AC2
GA2
EL2
Cool
Mode 2
nd
stage
Heat
Mode 2
nd
stage
*
Dots indicate
phased
relaonship.
Dots indicate
phased
relaonship.
THERMOSTAT
C
RC
RH
G
W2
W/E
Y2
L
O/B
Y
NEUTRAL
SYSTEM
CONFIGURATION
Heang Transformer
Cooling Transformer
Heat Pump Systems
* Internal jumper between RC and R H, located on back of thermostat above battery compartment.
* * Common connection required on Heat -only, Cool -only or Heat Pump systems.
HOT
HOT
NEUTRAL
24 VAC
120 VAC
NEUTRAL
Single
stage
Heat
Pump
HP1
24 Volt
(Hot)
Cool
24 Volt
(Hot)
Heat
24 Volt
(Common
)
Heat and
Cool
Mode 1
st
stage
(compres
-
sor)
NOTE: Du
al
Fuel option
de-energizes
Heat Mode
1
st
stage
No
output
Heat
Mode 1
st
stage
No
output
Blower /
circulator fan
energized on
call for cool
(and heat if
configured
for electric
heat)
O
Energized
constantly in
Cool Mode
(Factory
Default)
B
Energized
constantly in
Heat Mode
(or Aux
Mode)
Heat Pump
“L” terminal
connection
Multi
-
stage
Heat
Pump
HP2
Cool
Mode
2
nd
stage
Heat
Mode 2
nd
stage
*
SYSTEM
CONFIGURATION
THERMOSTAT
C**
RC
RH
G
W2
W/E
Y2
L
O/B
Y
Dots indicate
phase
relationship.
Single Stage or Multi-Stage System (No heat pump) with Two Transformers
Heat Pump Systems