58
7.
Select the heating speed for your model from the heat-
ing speed chart in the Specification Sheet. The “ad-
just” setting (already established by the cooling speed
selection) determines which set of speeds are avail-
able. The selected speed must provide a temperature
rise within the rise range listed with the particular
model.
8.
Select the desired “heating” speed tap by positioning
switches 3 and 4 appropriately. Refer to figure above.
Verify CFM by noting the number displayed on the dual
7-segment LED display.
In general lower heating speeds will: reduce electrical consump-
tion, lower operating sound levels of the blower, and increase the
outlet air temperature delivered to the home. The speeds avail-
able allow the blower performance to be optimized for the particu-
lar homeowner’s needs.
B
LOWER
H
EAT
O
FF
D
ELAY
T
IMINGS
The integrated control module provides a selectable heat off de-
lay function. The heat off delay period may be set to 90, 120, 150,
180 seconds using the DIP switches or jumper provided on the
control module. The delay is factory shipped at 150 seconds but
may be changed to suit the installation requirements and/or ho-
meowner preference.
ComfortNet System
O
VERVIEW
NOTE:
DIP switch #13
MUST
be set to match thermostat
type. To use the CTK01 communicating thermostat, DIP
switch #13 must be set to ON position. This is also the cor-
rect setting for a non-communicating 2-stage thermostat. To
use the CTK02** modulating thermostat, check to make sure
DIP switch #13 is in the OFF position (factory position). This
is also the correct position when using a non-communicating
single stage thermostat.
The ComfortNet system is a system that includes a ComfortNet
compatible furnace and air conditioner or heat pump with a CTK0*
thermostat. A valid ComfortNet system could also be a compat-
ible furnace, CTK0* thermostat and non-compatible, single stage
air conditioner. Any other system configurations are considered
invalid ComfortNet systems and must be connected as a tradi-
tional (or non-communicating) system (
see Electrical Connec-
tions
for wiring connections).
A ComfortNet heating/air conditioning system differs from a non-
communicating/traditional system in the manner in which the
indoor unit, outdoor unit and thermostat interact with one another.
In a traditional system, the thermostat sends commands to the
indoor and outdoor units via analog 24 VAC signals. It is a one-
way communication path in that the indoor and outdoor units
typically do not return information to the thermostat.
The indoor unit, outdoor unit and thermostat comprising a
ComfortNet system “communicate” digitally with one another, cre-
ating a two-way communications path. The thermostat still sends
commands to the indoor and outdoor units. However, the ther-
mostat may also request and receive information from both the
indoor and outdoor units. This information may be displayed on
the ComfortNet thermostat. The indoor and outdoor units also
interact with one another. The outdoor unit may send commands
to or request information from the indoor unit. This two-way digital
communications between the thermostat and subsystems (in-
door/outdoor unit) and between subsystems is the key to unlock-
ing the benefits and features of the ComfortNet system.
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
1
2
R C
System Wiring using Two-Wires between Furnace and AC/HP
and Four-Wires between Furnace and Thermostat
C
OMFORT
N
ET
C
OMPATIBLE
F
URNACE
WITH
N
ON
-C
OMFORT
N
ET
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 is made using
both 4-position thermostat connectors in the CTK0* kit. Re-
move the red keying tabs from the on-board connector block and
position both 4-position connector such that “1”, “2”, “R”, “C”, and
“Y1” positions are filled.
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
1
2
R
C
4-Position Connectors
from CTK0*
Thermostat Kit
System Wiring between Furnace and Non-Communicating
Compatible Single Stage Air Conditioner
ABBREVIATIONS & DEFINITIONS
