SYSTEM OPERATION
50
ComfortNet™ System
NOTE:
Use of an accessory 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.
If your communicating thermostat kit does not include a
transformer, an accessory kit is available by ordering part
TFK01.
1
2
R
C
1
2
R C
1
2
R C
CTK0***
Thermostat
ComfortNet Compatible
Furnace Integrated
Control Module
ComfortNet Compatible
AC/HP Integrated
Control Module
40VA Transformer
208/230 VAC
24 VAC
S
YSTEM
W
IRING
USING
T
WO
-W
IRES
BETWEEN
F
URNACE
AND
F
OUR
-W
IRES
BETWEEN
F
URNACE
AND
T
HERMOSTAT
C
OMFORT
N
ET
C
OMPATIBLE
FURNACE
WITH
N
ON
-C
OMFORT
N
ET
C
OMPATIBLE
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.
1
2
R
C
1
2
R C
C
Y
ComfortNet
Compatible
Furnace Integrated
Control Module
CTK0***
Thermostat
Non-ComfortNet Compatible
Single Stage AC
G
W1 W2
Y1
Y2
O
S
YSTEM
W
IRING
BETWEEN
F
URNACE
AND
N
ON
-C
OMFORT
N
ET
C
OMPATIBLE
S
INGLE
S
TAGE
A
IR
C
ONDITIONER
C
OMFORT
N
ET
S
YSTEM
A
DVANCED
F
EATURES
The ComfortNet system permits access to additional sys-
tem information, advanced setup features, and advanced di-
agnostic/troubleshooting features. These advanced features
are organized into a menu structure. The menus are ac-
cessed and navigated as described in the following section.
A
CCESSING
AND
N
AVIGATING
THE
A
DVANCED
F
EATURES
M
ENUS
F
OR
T
HE
CTK01* T
HERMOSTAT
The advanced system features are accessed using the
ComfortNet thermostat. These advanced features are ac-
cessed as follows:
•
On the ComfortNet thermostat Home Screen Display,
touch the
Menu
key to display additional key choices.
•
Touch and hold the
Installer Config
key for approxi-
mately 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 In-
staller Configuration menu.
CTK02* Thermostat: From th e Home screen, press and
hold the left and right arrow keys for 3 seconds.
CTK03* or CTK04* Thermostat: From the Home screen,
press menu > installer options (you will need to enter the 4
digit date code which can be found in menu > dealer info)
For the ComfortNet menu: From the Home screen press
menu > ComfortNet user menu (you will need to enter the 4
digit date code which can be found in menu > dealer info)
