English
2 / 12
ATT025-040
2 Introduction
This manual refers to refrigeration dryers designed to guarantee high
quality in the treatment of compressed air.
2.1 Transport
The packed unit must:
• remain upright;
• be protected against atmospheric agents;
• be protected against impacts.
2.2 Handling
Use a fork-lift truck suitable for the weight to be lifted, avoiding any type
of impact.
2.3 Inspection
• All the units are assembled, wired, charged with refrigerant and oil
and tested under standard operating conditions in the factory;
• on receiving the machine check its condition: immediately notify the
transport company in case of any damage;
• unpack the unit as close as possible to the place of installation.
2.4 Storage
Y
If several units have to stacked, follow the notes given on the pack-
ing. Keep the unit packed in a clean place protected from damp and bad
weather.
3 Installation
For the correct application of the warranty terms, follow the instructions
given in the start-up report, fi ll it and send it back to Seller.
3.1 Procedures
Install the dryer inside, in a clean area protected from direct atmospheric
agents (including sunlight).
Y
Comply with the instructions given in par. 9.2 and 9.3.
Y
The fi lter elements (for 3 micron fi ltration or better) must be replaced
at least once a year, or sooner as per manufacturer recommendations.
Y
Correctly connect the dryer to the compressed air inlet/outlet con-
nections,
3.2 Operating space
Y
Leave adequate clearance around the dryer maintenance opera-
tions and clearance to ensure correct air fl ow. (~ 1,5 m).
3.3 Tips
To prevent damage to the internal parts of the dryer and air compres-
sor, avoid installations where the surrounding air contains solid and/or
gaseous pollutants (e.g. sulphur, ammonia, chlorine and installations in
marine environments).
The ducting of extracted air is not recommended for versions with axial
fans.
3.4 Electrical connection
Use approved cable in conformity with the local laws and regulations
(for minimum cable section, see par. 9.3).
Install a differential thermal magnetic circuit breaker with contact open-
ing distance of 3 mm ahead of the system (RCCB - IDn = 0.3A) (see the
relevant current local regulations).
The nominal current In of the magnetic circuit breaker must be equal to
the FLA with an intervention curve type D.
3.5 Condensate drain connection
Y
The dryer is supplied either with a fl oat drain, a timed drain or an
electronic level sensing drain.
If a timed or electronic unloader is installed, use terminals CN “R1-S1”
(see par. 9.8).
For timed and electronic drains: refer to separate manual supplied with
the dryer for specifi c details concerning the condensate drain.
Y
Make the connection to the draining system, avoiding connection in
a closed circuit shared by other pressurized discharge lines. Check the
correct fl ow of condensate discharges. Dispose of all the condensate in
conformity with current local environmental regulations.
3.6 Connections discharge purge air
The dryer has an air purge, which must be fi tted with a silencer (supplied
separately).
The silencer can be connected directly to the unit or away from the unit.
In the latter case, it must be connected using a rubber hose, max length
10m (synthetic rubber with inner steel spiral), resistant to temperatures
of up to 90° and pressures up to 10 bar.
Important: to ensure the correct functioning of the air purge, comply
with the dimensions indicated for the extension in the appendix in
para. 9.7. (Ø
Int.
= internal diameter)
3.7 Connecting the fi lter oil drainage
The oil residues generated by the fi lter are conveyed through a rilsan
hose (
Ø
8mm), out of the dryer in the point indicated in para. 9.6.
The drainage hose is fi tted with an end coupling so that additional exten-
sions can be fi tted by the user.
4 Commissioning
4.1 Preliminary checks
Before starting the dryer, make sure:
• installation was carried out according that given in the section 9.2;
• the air inlet valves are closed and that there is no air fl ow through
the dryer;
• the power supply is correct.
4.2 Starting
Before starting the dryer follow the following instruction:
• Switch the power on by turning the MAIN SWITCH (IG)
&
to “
ON”.
• Shows the “MAIN SCREEN VIEW on display.
Start the air compressor.
Start-up procedure dryer:
Press
to enter on “Main Menu”
- - -Main Menu - - -
START/STOP
USER SETTINGS
SERVICE
INFORMATION
Select
START/STOP
and confi rm with
Enter
- - -Main Menu - - -
START/STOP
USER SETTINGS
SERVICE
INFORMATION
Select:
NORMAL START/STOP
and confi rm with
Enter
- On/Off Menu -
NORMAL START/STOP
STOP DIRECTLY
Confi rm
START
, for the start-up
ENABLE UNIT RUNNING
STOP
“Compressed Inlet Air” pressure
insuffi cient, dryer blocked.
INSUFFICIENT AIR PRESSURE
!Y
Attention: The air compressor must be started before the
dryer. Otherwise you may damage the electric resistance.
The fi rst start-up is in “Forced Regeneration” on default.
The unit works for a complete cycle (2 columns), after switches to normal
working.
