PG
5
Find the step-by-step diagram for your system
• Select the reference page
with your wiring diagram and
set-up information below.
• The C-wire is optional but
preferred. Without a C-Wire the
CT110 will operate on batteries
only for about one year.
• Hot water systems diagrams
are on pg20.
• If your combination of wires
is not above you can use the
wiring table at the end if the
install section to determine
your connections, contact
customer support for help.
G
C W Y RH RC
G
5 Wire
Heat/Cool
From
HVAC
RC
Y
R
H
W
C W Y R G
4 Wire
Heat/Cool
F
rom
HVAC
G
Y
R
W
C W R G
3 Wire
Heat
From
HVAC
R
G
W
F
rom
HVAC
W
C W R
R
2 Wire
Heat
WIRE
S
WIRE
S
WIRE
S
WIRE
S
G
R
C Wn Yn R
G
Multi-stage Cool
Multi-Stage Heat
F
rom
HVAC
Y
n
W
n
C B
or
O AUX
n
Y
n
R G
Multi-stage
Heat Pump
w/
Multi-stage
Aux Heat
F
rom
HVAC
R
O
or
AUX n
B
G
Yn
G
C
B
or
O Y R
G
4 Wire Heat Pump
w/o Aux Heat
From
HVAC
R
O
or
Y
B
WIRE
S
WIRES
WIRE
S
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