Specifications

Technical description
DRYPOINT RA 80 – 720 25
5.17. DMC20 Electronic Instrument (Air Dryer Controller)
P
Q
S
0
0
1
1
1.
Back-lighted LCD display
8.
Led dryer in Stand-by
2.
Led compressor ON
9.
Led alarm ON
3.
Led condenser fan(s) ON
10.
Not used
4.
Not Used
11.
Set-up access button
5.
Not Used
12.
Incremental button
6.
Not Used
13.
Decrement button
7.
Led crankcase heater ON
14.
Dryer start-up button
15.
Dryer stop button
The DMC20 controls all the operations, the alarms and the operational setting of the dryer. By means of a 32-character
display it shows all the operating conditions. In case of abnormalities, a set of messages in the selected language
allows a fast detection of the fault and the relevant solution.
5.17.1 DISPLAY MESSAGES
When the main switch is turned ON, all the characters of the DMC20 display are activated for 2 seconds. Afterwards,
the software release appears, and finally the two lines of the display are ready for their normal functions.
When the dryer is in stand-by condition, the display shows "Stand-by", and the "crankcase oil heater" and "Stand-by"
leds are ON. If the remote command is in use, the display shows "Stand-by Remote".
To switch ON the dryer, keep the button [14] "Dryer Start-up" pressed for at least 2 seconds.
NOTE : DMC20 has an internal timer that cannot allow to restart the compressor before 4 minutes after the
switch off.
The upper line of the display will show the DewPoint. The following parameters can be selected and displayed on the
lower line:
Air →O
- temperature of the incoming air in °C
Air ←O
- temperature of the outgoing air °C
Compr.LP - suction temperature of the compressor (low pressure side) in °C
Compr.HP - discharge temperature of the compressor (high pressure side) in °C
Condens. - condensing temperature in °C
Ambient - ambient temperature in °C
Water →O
- inlet temperature of the cooling water (Water-Cooled) in °C
Working - operating time of the dryer in hours
The parameter to be displayed on the lower line is selected pressing the [12] or [13] keys.
In alarm condition, the list of the parameters to be displayed will include the DewPoint.
To Shut down the dryer, keep the [15] button "Dryer Stop" pressed for at least 2 seconds