Installation Manual

9
CONTROL WIRING
NOTE: Refer to Electrical Connections - High Voltage Connections
for 208/230 volt line connections to the air conditioner.
NOTE: A removable plug connector is provided with the control to
make thermostat wire connections. This plug may be removed,
wire connections made to the plug, and replaced. It is strongly
recommended that multiple wires into a single terminal be twisted
together prior to inserting into the plug connector. Failure to do
so may result in intermittent operation.
Typical 18 AWG thermostat wire may be used to wire the system
components. However, communications reliability may be im-
proved by using a high quality, shielded, twisted pair cable for the
data transmission lines. In either case, 150 feet is the
recommended length of wire between indoor unit and outdoor
unit, or between indoor unit and thermostat.
Only data lines 1 and 2 are required between the indoor and
outdoor units. The included 40VA, 208/230 VAC to 24 VAC
transformer must be installed in the outdoor unit to provide 24
VAC power to the outdoor unit’s electronic control. See kit
instructions for mounting and wiring instructions.
NOTE: Use of a 40VA tramsformer is always recommended with
multi-stage equipment. Failure to use the transformer in the
outdoor unit could result in over loading of the furnace
transformer.
1
2
R
C
1
2
R
C
1
2
R
C
CTK04
COMFORTNET™ SYSTEM ADVANCED FEATURES
The ComfortNet system permits access to additional system infor-
mation, advanced setup features, and advanced diagnostic/
troubleshooting features. These advanced features are organized
into a menu structure. See thermostat installation manual for
directions on how to access the ComfortNet User Menus. See fol-
lowing tables for menu layout.
DIAGNOSTICS
Accessing the air conditioner/heat pump’s diagnostics menu pro-
vides ready access to the last six faults detected by the air condi-
tioner/heat pump. Faults are stored most recent to least recent.
Any consecutively repeated fault is stored a maximum of three
times. Example: The power supply to the air conditioner/heat pump
is continuously below 187 VAC. The control will only store this
fault the first three consecutive times the fault occurs.
NOTE: It is highly recommended that the fault history be cleared
after performing maintenance or servicing the heat pump.
IDENTIFICATION
Model Number, Serial Number and Software Version are displayed
within this menu. A model number check will help determine if
the equipment shared data is correct for the unit. If the model
number is not correct, even though very rare, a memory card is
available to load the proper data.
SENSORS
The outdoor ambient temperature and coil temperature are dis-
played in the Sensor Menu. This information can be used for
troubleshooting purposes.
COOL S ET-UP
This menu allows for the adjustment of several cooling perfor-
mance variables. Cool Airflow Trim (range from -10% to 10% in 2%
increments), Cool Airflow Profiles, Cool Fan ON Delay, Cool Fan
OFF Delay and Dehumidification Select (enable or disable dehu-
midification) can be adjusted in this menu. See the following
images showing the four cooling airflow profiles.
• Profile A (default) provides only an OFF delay of one (1) minute
at 100% of the cooling demand airflow.
OFF
100% CFM 100% CFM
1 min
OFF
• 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.
50% CFM
1/2 min
100% CFM
100% CFM
1 min
OFF
OFF
• Profile C ramps up to 82% 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 C also
has a one (1) minute 100% OFF delay.
100% CFM
OFF
OFF