Schneider Airsystems DK 2300, Original Operating Manual

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GB
5.10 DMC14 ELECTRONIC INSTRUMENT (AIR DRYER CONTROLLER)
DMC 14
°C
°F
esc set
DISPLAY
set Button - access the set-up.
esc Button - Exit programming / decrease value.
Button - condensate drain test / value increment.
LED - Dryer in alarm status.
●
°C
LED - Display the set temperature scale (°C).
●
°F
LED - Display the set temperature scale (°F).
●
LED - condensate drain solenoid valve on.
The DMC14 controller performs a double function : through the digital thermometer with an alphanumerical
display it shows the DewPoint detected by the probe in the evaporator; it controls the functioning of
condensate drain solenoid valve through the cyclic electronic timer.
The LED
indicates any alarm conditions, that may occur when:
- DewPoint too high;
- DewPoint too low;
- the probe is damaged.
If the probe is damaged the instrument displays the message “PF” (Probe Failure), and the alarm goes off
immediately. In case of alarm for a very low DewPoint (ASL fixed parameter equal to -2°C) the signal is
delayed by a fixed time (AdL parameter) of 30 sec, whereas in case of alarm for a very high the threshold value
(ASH parameter) can be set by the user and delayed by an AdH value, which can also be programmed (the
instrument has default settings that are indicated below). As soon as the DewPoint falls back into the set
temperature range the alarm is disabled.
DMC14 allows also remote annunciation of this alarm condition of the dryer :
- with dryer off or in alarm conditions there is no voltage from terminal 4 and 9 of electronic instrument
(please also see electric drawings into the attachments);
- whereas, with dryer on and correct operating DewPoint, there is voltage from terminal 4 and 9 of
electronic instrument (please also see electric drawings into the attachments).
OPERATION - When the dryer is switched on, the instrument displays the current DewPoint: display
indicates the temperature measured, expressed in Celsius (
●
°C ) with a resolution of 0.5°C or in
Fahrenheit (
●
°F
) with a resolution of 1°F.
The condensate drain solenoid valve is activated for 2 seconds (Ton) - LED (
●
) on - each minute (ToF),
if standard setting.
To perform the manual test for the condensate drain, press the
button.
SET-UP
Keep the buttons
set
and pressed simultaneously for at least 5 seconds to start the
programming. The display will show the first parameter to set (Ton); press the button
set
again to display
the set value. To select the desired parameter press in sequence the button
set
. To change the value of
the selected parameter use the buttons
esc
and . All the parameters can be changed following the
diagram below:
Display Description Value range Set value Equal to
Ton Activation time of the condensate drain solenoid valve. 01 … 20 02 2 sec
ToF Pause time of the condensate drain solenoid valve. 01 … 20 01 1 min
ASH Alarm threshold for a high DewPoint . 0.0 … 20.0 15 15°C
AdH ASH alarm time before signal 00 … 20 20 20 min
SCL Temperature scale °C … °F °C °Celsius
Fixed parameters :
ASL (low DewPoint alarm) = -2°C AdL (signal delay) = 30 sec
In any moment it is possible to exit the programming mode by pressing the buttons
esc
and at the
same time. In case no operations are made during 30 seconds, the system exits automatically the set-up
condition.