6 Operation
Rittal air/water heat exchanger assembly instructions
21
EN
In regular operation, the display shows both the tem-
perature (in degrees Celsius or Fahrenheit – users
may switch between the two) and any error messag-
es.
The current enclosure internal temperature is usually
displayed permanently. In the event of an error mes-
sage, this will alternate with the temperature display.
The unit is programmed using buttons 1 – 3 (Fig. 19).
The relevant parameters also appear in the display.
6.2.2 Launching test mode
The Comfort controller is equipped with a test func-
tion, whereby the air/water heat exchanger com-
mences cooling operation independently of the set
temperature or door limit switch function.
• Simultaneously press buttons 1 and 2 (Fig. 19)
for at least five seconds.
The air/water heat exchanger starts running.
After approximately five minutes or upon reaching
15°C, test mode is complete. The unit switches off
and changes to normal operation.
6.2.3 General programming information
Using buttons 1, 2 and 3 (Fig. 19) you can change
24 parameters within the preset ranges (min. value –
max. value).
Tables 4 and 5 show the parameters which can be
altered. Fig. 20 on page 23 shows which buttons
must be pressed.
In principle, the programming is identical for all
editable parameters.
To enter programming mode:
• Press button 2 (“Set”) for approx. five seconds.
The controller is now in programming mode. While in
programming mode, if you do not press any buttons
for approx. 30 seconds, the display will first flash,
then the controller will switch back to normal display
mode. The “Esc” display indicates that any made
changes have not been saved.
• Press the programming buttons
▲
(°C) or
▼
(°F)
to switch back and forth between the editable
parameters (see Tables 4 and 5).
• Press button 2 (“Set”) to select the displayed
parameter for editing.
The current value of this parameter is displayed.
• Press one of the programming buttons
▲
(°C) or
▼
(°F).
The “Cod” display will appear. In order to be able to
change a value, you must enter the authorisation
code “22”.
• Keep the programming button
▲
(°C) held down
until “22” appears.
• Press button 2 (“Set”) to confirm the code.
You can now alter the parameter within the preset
limits.
• Press one of the programming buttons
▲
(°C) or
▼
(°F) until the required value appears.
• Press button 2 (“Set”) to confirm the change.
You can now alter other parameters in the same way.
There is no need to re-enter the authorisation code
“22”.
• To exit programming mode, press button 2 (“Set”)
again for approximately five seconds.
“Acc” will appear in the display to indicate that the
changes have been saved. The display will then
switch back to regular operation (enclosure internal
temperature).
You can also program the Comfort controller using
a diagnosis software package (Model No.
SK 3159.100), the supply of which also includes a
connection cable to the PC. The cable connector on
the rear of the Comfort controller display serves as
an
interface.
Note on switching hysteresis:
With a low hysteresis and short switching
cycles, there is a risk that cooling may not
be adequate or that only partial sections of
the enclosure are cooled.
Note on temperature settings:
With the Comfort controller, the temperature
is preset in the factory to +35°C.
In order to save energy, do not set the tem-
perature lower than that actually necessary.
Note on useful cooling output:
Interactive performance diagrams for
calculating the useful cooling output may
be found at www.rittal.com.
Summary of Contents for SK 3209. Series
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