SYSTEM OPERATION
52
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 overloading of the furnace
transformer.
When using a CTK03A*or CTK04 thermostat, the included
transformer must be used.
If your communicating thermostat kit does not include a
transformer, an accessory kit is available separately 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 F URNACE WITH N ON-COMFORTNET A/C
S
INGLE STAGE A IR C ONDITIONER
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 F URNACE AND N ON-COMFORTNET
COMPATIBLE SINGLE STAGE AIR CONDITIONER
COMFORTNET S YSTEM ADVANCED 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.
To Next Page
Loading...
