Service Manual

SYSTEM OPERATION
60
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
2R
C
12RC
12
RC
CTK0***
Thermostat
ComfortNet Compatible
Furnace Integrated
Control Module
ComfortNet Compatible
AC/HP Integrated
Control Module
40VA Transformer
208/230 VAC
24 VAC
SYSTEM WIRING USING TWO-WIRES BETWEEN FURNACE AND
FOUR-WIRES BETWEEN F URNACE AND T HERMOSTAT
COMFORTNET C OMPATIBLE FURNACE WITH N ON-COMFORTNET
COMPATIBLE SINGLE STAGE AIR CONDITIONER
Four wires are required between the furnace and thermo-
stat. Two wires are required between the furnace control
and single stage air conditioner. For this system configura-
tion, the “Y1” terminal on the integrated furnace control be-
comes an output rather than an input.
1
2R
C
12RC
C Y
ComfortNet
Compatible
Furnace Integrated
Control Module
CTK0***
Thermostat
Non-ComfortNet Compatible
Single Stage AC
G
W1 W2 Y1 Y2
O
SYSTEM WIRING BETWEEN FURNACE AND NON-
COMFORTNET
COMPATIBLE SINGLE STAGE AIR CONDITIONER
COMFORTNET SYSTEM ADVANCED FEATURES
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.
ACCESSING AND N AVIGATING THE A DVANCED FEATURES
MENUS FOR THE CTK01* THERMOSTAT
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.
CTKO2* Thermostat: From the Home screen, press and hold
the left and right arrow keys for 3 seconds.
CTKO3* 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).
NOTE: PCBKF105 IFC has the added feature of 24 VAC
input to G terminal when using a communicating thermo-
stat. ERV/HRV and other accessories can send a signal to
the G terminal and energize the continuous Fan. The con-
tinuous fan speed can be adjusted on switch bank S5, dip
switch 3 & 4. The 24 vac source must originate from the R
terminal of furnace.
W1 W2 Y1 Y2 O DEHUM
24 vac "G" input to Furnace
Integrated Control module From
ERV / HRV or Similar Devices
1
1
2RC
2
Furnace Integrated
Control Module
RC
G
CTK0* Thermostat
4-Pin (X2), 7 Pin, or 9 Pin Connector