43
COMFORTNET™ SYSTEM
Typical 18 AWG thermostat wire may be used to wire the system
components. One hundred (100) feet is the maximum length of
wire between indoor unit and outdoor unit, or between indoor unit
and thermostat.
F
OUR
-W
IRE
I
NDOOR
AND
O
UTDOOR
W
IRING
Typical wiring will consist of four wires between the indoor unit and
outdoor unit and between the indoor unit and thermostat. The
required wires are: (a) data lines, 1 and 2; (b) thermostat “R” (24
VAC hot) and “C” (24 VAC common).
1
2
R
C
1
2
R C
1
2
R C
CTK01AA
Thermostat
CT™ Compatible Furnace
Integrated Control Module
CT™ Compatible AC/HP
Integrated Control Module
System Wiring using Four-Wires
T
WO
-W
IRE
O
UTDOOR
, F
OUR
-W
IRE
I
NDOOR
W
IRING
Two wires only may be utilized between the indoor and outdoor
units. For this wiring scheme, only the data lines, 1 and 2, are
required between the indoor and outdoor units. A 40VA, 208/230
VAC to 24VAC transformer must be installed in the outdoor unit to
provide 24VAC power to the outdoor unit’s electronic control. The
transformer is included with the CTK01AA kit. See kit instructions
for mounting and wiring instructions. Four wires are required be-
tween the indoor unit and thermostat.
NOTE:
Use of the CTK01AA transformer is recommended if
installing a dual fuel system. Failure to use the transformer in the
outdoor unit could result in over loading of the furnace transformer.
1
2
R
C
1
2
R C
1
2
R C
CTK01AA
Thermostat
CT™ Compatible
Furnace Integrated
Control Module
CT™ Compatible
AC/HP Integrated
Control Module
40VA Transformer (included in
CTK01AA kit)
208/230 VAC
24 VAC
System Wiring using Two-Wires between Furnace and AC/HP and
Four-Wires between Furnace and Thermostat
CT C
OMPATIBLE
F
URNACE
WITH
N
ON
-CT
COMPATIBLE
S
INGLE
-
S
TAGE
A
IR
C
ONDITIONER
Four wires are required between the furnace and thermostat. Two
wires are required between the furnace control and single stage air
conditioner. For this system configuration, the “Y1” terminal on
the integrated furnace control becomes an output rather than an
input. The “Y1” connection to the outdoor unit may be made
using the 9-position thermostat connector or by using both the 4-
position thermostat connectors in the CTK01AA kit. Remove the
red keying tabs from the on-board connector block and position
either the 9-position connector or both 4-position connector such
that “1”, “2”, “R”, “C”, and “Y1” positions are filled.
1
2
R
C
1
2
R C
C
Y
CT™ Compatible
Furnace Integrated
Control Module
CTK01AA
Thermostat
Non-CT™ Compatible
Single Stage AC
G
W1 W2
Y1
Y2
O
System Wiring between Furnace and Non-CT Compatible Single
Stage Air Conditioner
C
OMFORT
N
ET
S
YSTEM
A
DVANCED
F
EATURES
The ComfortNet system permits access to additional system in-
formation, advanced setup features, and advanced diagnostic/
troubleshooting features. These advanced features are organized
into a menu structure. The menus are accessed and navigated as
described in the following section.
A
CCESSING
AND
N
AVIGATING
THE
A
DVANCED
F
EATURES
M
ENUS
The advanced system features are accessed using the ComfortNet
thermostat. These advanced features are accessed as follows:
•
On the CT thermostat Home Screen Display, touch the
Menu
key to display additional key choices.
•
Touch and hold the
Installer Config
key for approximately
3 seconds to enter the Thermostat Options Configuration
menu.
•
Touch and hold the
Installer Config
key again for
approximately 3 seconds to enter the Advanced Installer
Configuration menu.
