6
Regulation
CH–DIN regulation of all RKW INOX units
The CH–DIN microprocessor regulates the chiller for all
INOX units. It is located in the electrical switch box of
the unit and monitors all control and safety functions:
◊
Controls and displays incoming and outgoing cold
water temperatures
◊
Displays the time delay of the compressor and fan
◊
Checks that the outgoing water temperature is not
too low (frost monitoring)
◊
Displays and controls all safety mechanisms that
have been stopped due to a malfunction
◊
Displays the operating mode
◊
Regulates the condensation temperature
The regulator consists of the basic unit to control unit
operation. A fan board is connected to the basic unit
that controls the rotation of the fan motors by regulating
the output current depending on the liquefaction tem-
perature.
Models RKW 3600 INOX and higher have two cold cy-
cles. The second cycle cannot be regulated by the CH–
DIN basic unit because there are not enough inputs and
outputs. For this reason, the extra C2-DIN regulator
controls the second cycle. Programming is, however,
still performed using the CH–DIN basic unit.
Value Display
The value display shows the target value in degrees
with one decimal place in Celsius. It can also display:
◊
All parameter settings
◊
The codes for all alarms
◊
The status of the functions
◊
The operating hours
◊
The shut-off status
◊
The current delays
A square LED displays minus temperatures and an LED
in the top left-hand corner shows the multiplier of the
displayed value with 100.
8
8.
8
Arrow Keys
The set value for each parameter can be changed with
the arrow keys.
When the parameter programming operating mode is
accessed (via the MENU button), both displays show a
value (continuous display). After the SET button has
been pressed, the code display (parameters) starts
blinking. The displayed values can be increased or de-
creased using the arrow keys. If the SET is pressed a
second time, the value display blinks. The new values
are saved by pressing the SET button again. Both dis-
plays switch from a blinking display to a continuous display.
MENU Button with one LED
The MENU button provides access to the parameter list
and displays the parameters on the code display and
the associated value on the value display.
MENU
CH– DIN panel
CH-DIN
Line
Alarm
Comp
Heat
Cool
STATUS
MENU
ON/OFF
RESET
8
8
8
8.
8
SET
MODE
e
Value display
Code display
Arrow keys
MODE button
SET button
MENU button
STATUS button
ON/OFF
RESET button
Code Display
The code display indicates the number of the parameter
(or the function) whose value or status appears in the
value display. If a parameter is shown in the code dis-
play, the setting appears in the value display.
8
8
STATUS Button with one LED
The STATUS button provides access to the status list
and displays the status settings by pressing the arrow
keys.
The code display shows the function number of the
function list and the value display shows the corre-
sponding setting. The codes and their descriptions are
described in the table on page 8.
STATUS
The panel has two displays: the value display (three
numbers on the left) and the code display (two numbers
on the right).
The buttons
allow operating
processes (parameters) and their associated values to
be changed.
STATUS
MENU
ON/OFF
RESET
SET
MODE
MODE Button with two LEDs
The regulation mechanism was designed for use of a
chiller in the cooling operating mode
and as a
heat pump in the cooling and heating operating
modes.
Only the summer operating mode (cooling mode)
may be used for all INOX units
.
MODE
Cool
e
Heat
Cool
e
