English
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ATT025-040
Y
It is recommended to complete this type of starting with the air out-
let valve closed, to preserve the correct operation of the desiccant bed.
4.3 Operation
Leave the dryer in working during the period of working of the air com-
pressor.
• The dryer works automatically, calibrations are not required on the
fi eld;
• if there are excessive and unexpected air fl ows, by-pass to avoid
overloading the dryer.
4.4 Operation with Dew point control
In the case of work loads below the nominal or if you want different dew
point of -40 ° C, it is possible to work in
Dew Point Control
. The system
automatically controls the time of the cycles of operation to obtain and
maintain the predetermined dew point, with the result of energy saving in
case of work with partial loads.
Procedure to set “dew point control”.
Press Prg to enter on main menu
Using
Up
and
Down
select
“
USER SETTINGS”
Press
Enter
to confi rm.
- - -Main Menu - - -
START/STOP
USER SETTINGS
SERVICE
INFORMATION
Shows the “User settings menu
- User Settings Menu -
DRYER SETTINGS
DATE/TIME
BMS
MOISTURE DRAIN
OTHER
LANGUAGE
Using
Up
and
Down
select
“DRYER SETTINGS”
Press
Enter
to confi rm.
- User Settings Menu -
DRYER SETTINGS
DATE/TIME
BMS
MOISTURE DRAIN
OTHER
LANGUAGE
Using
Up
and
Down
select
the parameter.
Press
Enter
to confi rm.
U1 - DEWP.SET (°C): -40
U2 - PRESSURE (barg): 07
U3 - MODE: Forced Rig.
U4 - ALARM RELAY MODE:
by: ALARMS & WARNINGS
U6 - DPM: NO FITTED
Select the parameter
U1- DEWP.SET
(°C) and set the value you need.
Press
Enter
to confi rm. see Table 1 for identifying the correct value
to be set
Select the parameter
U6- DPM
: set the mode
FITTED.
Press
Enter
to confi rm.
Table 1
Dew
Point
Application
-70°C
Request for a very low dew point.
-40°C
Request for a very low dew point.
(depend on the type of the process.).
-20°C
Request for a low dew point.
When the pipes air compressed are in external environ-
ment and the minimum winter ambient temperatures are
above -10 to -15 ° C.
-10°C
Request for a low dew point.
When the pipes air compressed are in external environ-
ment and the minimum winter ambient temperatures are
above -5°C.
0°C
Request for a dew point standard.
When the pipes air compressed are in external environ-
ment and the minimum winter ambient temperatures are
above 10°C.
Important: for correct readings, the Dew point sensor must work at
a precise air fl ow, which is adjusted by a fl ow meter (no. 33).
CORRECT CALIBRATION: LEVEL 2 ÷ 5 liters/minutes
To ensure optimal Dew point sensor operation, comply with the
maintenance instructions given in para. 6.4.
In this regard, the sensor connection is fi tted with a shut-off valve to
facilitate maintenance
4.5 Stop
It is possible to stop the dryer in two different mode:
• NORMAL
• FORCED
Y
Is recommended to use the option “Normal”.
Y
Use the option “Forced” only if necessary.
Mode stop “NORMAL”:
Press
to enter on “Main Menu”
- - -Main Menu - - -
START/STOP
USER SETTINGS
SERVICE
INFORMATION
Select
START/STOP
press
Enter
to confi rm
- - -Main Menu - - -
START/STOP
USER SETTINGS
SERVICE
INFORMATION
Select
NORMAL START/STOP
press
Enter
to confi rm
- On/Off Menu -
NORMAL START/STOP
STOP DIRECTLY
Press
Enter
to confi rm the
STOP
ENABLE UNIT RUNNING
STOP
Y
IMPORTANT: wait for the dryer to perform the complete cycle
of regeneration, IT IS ABSOLUTELY PROHIBITED TO STOP THE
FLOW OF AIR UNTIL THE STOP OF THE DRYER.
Mode stop “FORCED”.
Press
to enter on “Main Menu”
- - -Main Menu - - -
START/STOP
USER SETTINGS
SERVICE
INFORMATION
Select
START/STOP
press
Enter
to confi rm
- - -Main Menu - - -
START/STOP
USER SETTINGS
SERVICE
INFORMATION
Select
“Stop Directly”
Press
Enter
to confi rm
- On/Off Menu -
NORMAL START/STOP
STOP DIRECTLY
Select
YES
and confi rm.
After few second the value return
to “
NO”
.
FORCING SYSTEM OFF
NO
Y
IMPORTANT:
Machine ON: the machine should always work under pressure.
Machine OFF: do not allow air to fl ow into the tanks with the dessi-
cant when the machine is turned off.
