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• Profile A provides only an OFF delay of one (1) minute at
100% of the cooling demand airflow.
100% CFM
OFF
Figure 53A
• Profile B ramps up to full cooling demand airflow by
first stepping up to 50% of the full demand for 30
seconds. The motor then ramps to 100% of the required
airflow. A one (1) minute OFF delay at 100% of the
cooling airflow is provided.
100% CFM
50% CFM
OFF
1/2 min
Figure 53B
• Profile C ramps up to 85% of the full cooling demand
airflow and operates there for approximately 7 1/2
minutes. The otor then steps up to the full demand
airflow. Profile C also has a one (1) minute 100% OFF
delay.
OFF
Figure 53C
• Profile D ramps up to 50% of the demand for 1/2 minute,
then ramps to 85% of the full cooling demand airflow
and operates there for approximately 7 1/2 minutes.
The motor then steps up to the full demand airflow. Profile
D has a 1/2 minute at 50% airflow OFF delay.
OFF
Figure 53D
Airflow Tables
7. Select the heating speed for your model from the heating
speed table in this manual. The "adjust" setting
(already established by the cooling speed selection)
determines which set of speeds are available. 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 the airflow
table. Verify CFM by noting the number displayed on the
dual 7-segment LED display.
100% CFM
OFF
1 min
100% CFM
OFF
1 min
100% CFM
OFF
OFF
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 par-
ticular needs of the installation.
B
H
O
D
LOWER
EAT
FF
ELAY
The integrated control module provides a selectable heat off
delay function. The heat off delay period may be set to 90,
120, 150, 180 seconds using the DIP switches or jumper pro-
vided on the control module. The delay is factory shipped at
150 seconds but may be changed to suit the installation re-
quirements and/or homeowner preference. Refer to the DIP
switch chart in the back section of this manual for switch
positions and corresponding delay times.
C
N
™ S
OMFORT
ET
YSTEM
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
correct setting for a non-communicating 2-stage thermo-
stat. To use the CTK02**, CTK03** or CTK04** 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
compatible furnace, CTK0* thermostat and non-compatible,
single stage air conditioner. Any other system configurations
are considered invalid ComfortNet systems and must be con-
nected as a traditional (or non-communicating) system (see
Electrical Connections 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 com-
mands to the indoor and outdoor units via analog 24 VAC signals.
It is a one-way communication path in that the indoor and out-
door 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,
creating a two-way communications path. The thermostat
still sends commands to the indoor and outdoor units. However,
the thermostat 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 out-
door 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 (indoor/outdoor unit) is the key to unlocking the
benefits and features of the ComfortNet system.
T
IMINGS
45
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