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2
Introduction
Th is manual refers to refrigeration dryers designed to guarantee high
quality in the treatment of compressed air.
2.1
Transport
Th e 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 lift ed, 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
If several units have to stacked, follow the notes given on the packing.
Keep the unit packed in a clean place protected from damp and bad
weather.
3
Installation
For the correct application of the warranty terms, follw 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 atmospher-
ic agents (including sunlight).
In places with fi re hazard, provide for a suitable fi re-extinguishing sys-
tem.
Y
Comply with the instructions given in par. 8.2 and 8.3.
All dryers must be fi tted with adequate pre-fi ltration near the dryer air
inlet. Seller is excluded any obligation of compensation or refund for any
direct or indirect damage caused by its absence
Y
Pre-fi lter element (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 a space of 60 inches (1.5 m) around the unit.Leave a space
of 80 inches (2 m) above dryer models with vertical condensation air
expulsion.
3.3
Versions
Air-cooled version (Ac)
Do not create cooling air recirculation situations. Do not obstruct the
ventilation grilles.
3.4
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).
Th e ducting of extracted air is not recommended for versions with axial
fans.
3.5
Electrical connection
Use approved cable in conformity with the local laws and regulations
(for minimum cable section, see par. 8.3). Use copper conductors only,
rated for a temèerature of a least 140°F(60°C).
Connect the 3 cable phases to terminals L1-L2-L3 of the disconnecting
switch and the ground wire to the green screw or bolt identifi ed by the
label "GR".
Install a diff erential thermal magnetic circuit breaker with contact open-
ing distance 3 mm ahead of the system (IDn = 0.3A) (see the relevant
current local regulations).
Th e nominal current In of the magnetic circuit breaker must be equal to
the FLA with an intervention curve type D.
3.6
Condensate drain connection
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.
4
Commissioning
4.1
Preliminary checks
Before commissioning the dryer, make sure:
• installation was carried out according that given in the section 8.2;
• 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
• Start the dryer before the air compressor;
• switch the power on by turning the MAIN SWITCH
the POWER LED (2) lights up turning yellow.
x
• press
: the POWER LED (2) turns green and the compressor
switches on; the dew point is displayed.
Y
Phases Monitor
If appears to display the alarm "CP ", during the start up of the dryer, the
user must verify the wiring of the input terminals of the disconnecting
switch of the dryer.
Y
Fans(Ac version): if connected with the wrong phase sequence they
turn in the opposite direction, with the risk of being damaged (in this
case the air exits the dryer cabinet from the condenser grilles instead
from the fan grille - see par. 8.6 and 8.7 for correct air fl ow); immediately
invert two phases.
4.3
Operation
• Leave the dryer on during the entire period the air compressor is
working;
• Th e dryer operates in automatic mode, therefore fi eld settings are
not required;
• In the event of unforeseen excess air fl ows, by-pass to avoid over-
loading the dryer.
• Avoid air inlet temperature fl uctuations.
4.4
Stop
• Stop the dryer 2 minutes aft er the air compressor stops or in any
case aft er interruption of the air fl ow;
• Make sure compressed air does not enter the dryer when the dryer
is disconnected or if an alarm occurs.
x
• press
: the POWER LED (2) turns yellow again;
&
• Turn the MAIN SWITCH
to "O OFF" to switch the power off .
2
250
&
to "I ON":
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