fiac TDRY 6-18 Manuel D'instructions page 55

5.15 DMC15 ELECTRONIC INSTRUMENT (AIR DRYER CONTROLLER)
sec - min
set
DISPLAY
The DMC15 electronic controller performs the following functions : it shows the current operating DewPoint
through the digital led display which is detected from the (T1) probe located at the end of the evaporator,
while a second (T2) probe, located on the discharge side of the condenser, activates the relevant fan;
eventually it controls the functioning of condensate drain solenoid valve through the cyclic electronic timer.
OPERATION - During the dryer operation, the LED
Thermometer - The 10 LED display indicates the current operating DewPoint, shown by means of a two
colours (green - red) bar over the display itself.
• Green section - operating conditions ensuring an optimal DewPoint;
• Red section - DewPoint of the dryer too high, the dryer is working with elevated thermal load (high inlet
air temperature, high ambient temperature, etc.). The treatment of the compressed air may be improper.
Too high DewPoint temperature, value exceeding the upper limit of the instrument range, is indicated by the
intermittent flashing of the last LED; whereas the intermittent flashing of the first LED shows too low
DewPoint temperature.
A possible (T1) probe failure is indicated by the intermittent flashing of the first and last LED of the display,
whereas the dryer keeps on working correctly.
Thermostat - The fan condenser is activated when the condensate temperature reaches or exceeds 35°C
(FAN ) - LED on - and it is deactivated when the temperature goes down to 30°C (FAN
ON
off. In case of (T2) probe failure, the fun will run continuously and the
Timer - The condensate drain solenoid valve is activated for 2 seconds (T
(T ), if standard setting. To perform the manual test for the condensate drain, press the
OFF
SET-UP - The DMC15 is adjusted during the final test of the dryer. In case of particular requirements
concerning the operation management, the user can change the setting of the programmed parameters.
The parameters which can be set up are the following :
• FAN
- activation temperature of condenser fan. It is adjustable inside the following range of values,
ON
with step of 1°K; whereas the Hys hysteresis is fixed and equal to -5ºK.
• T
- activation time of the condensate drain solenoid valve.
ON
• T
- pause time between two consecutive activation of the condensate drain solenoid valve.
OFF
To access the set-up, keep the button
the command. First appears the (FAN
set
button. To change the value of the selected parameter, keep the
on button ; the current value is shown on the LED display. For the value range and the resolution
(value of each single LED), see the following table :
Parameter
Activation temperature of
FAN
ON
Activation time of the condensate
T
ON
drain solenoid valve
Pause time of the condensate
T
OFF
drain solenoid valve
To exit the set-up condition in any moment, press the
minutes, the system automatically exits the set-up condition.
DMC 15
ON
set
) parameter; to access the other parameters, press sequentially the
ON
Description
condenser fan
set
Button - access the set-up.
Button - condensate drain test / value increment.
Green LED - glowing = power on.
Yellow LED - glowing = condensate drain solenoid valve on.
Yellow LED - glowing = condenser fan on.
is on.
pressed for at least 2 seconds;
Display
Synchronous flashing
LED + LED
Synchronous flashing
LED + LED
Non-Synchronous flashing
LED + LED
button. If no operations are performed for 2
- Hys) - LED
ON
LED will intermittent flash.
) - LED on - each minute
ON
button.
LED flashing confirms
set
button pressed and operate
Value Resolution
range
31 - 40 °C 1°K
1 - 10 sec 1 sec
1 - 10 min 1 min
GB
Set
value
35°C
2 sec
1 min