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3
Installation
Y
For the correct application of the warranty terms, follow the
instructions given in the start- -up report, fill it in and send it back
to Seller.
3.1
Procedures
Install the dryer inside, in a clean area protected from direct at-
mospheric agents (including sunlight).
In places with fire hazard, provide for a suitable fire--- extinguish-
ing system.
Y
Correctly connect the dryer to the compressed air inlet/out-
let connections.
Y
For correct installation, follow the instructions given in par.
8.2 and 8.3.
All dryers must be fitted with adequate pre--- filtration near the
dryer air inlet. Seller is excluded any obbligation of compensation
or refund for any direct or indirect damage caused by its absence.
Y
Pre--- filter element (for 3 micron filtration or better) must
be replaced at least once a year, or sooner as per manufacturer
recommendations.
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 com-
pressor, 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.
3.5
Electrical connection
Use approved cable in conformity with the local laws and regula-
tions (for minimum cable section, see par. 8.3). Use copper con-
ductors only, rated for a temperature of at least 140˚F (60˚C).
Connect the 3 cable phases to terminals L1--- L2--- L3 of the dis-
connecting switch and the ground wire to the green screw or bolt
identified by the label "GR". Install a differential thermal mag-
netic circuit breaker with contact opening distance of 0.12 inches
(3 mm) ahead of the system (IDn = 0.3A) (see the relevant cur-
rent local regulations).
The 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 con-
nection in a closed circuit shared by other pressurized discharge
lines. Check the correct flow of condensate discharges. Dispose
of all the condensate in conformity with current local environ-
mental regulations.
4
Commissioning
4.1
Preliminary checks
Before starting the dryer, make sure:
a) installation was carried out according that given in the section
3;
b) the air inlet valves are closed and that there is no air flow
through the dryer;
c) the power supply is correct;
4.2
Starting
a) Start the dryer before the air compressor;
b) switch the power on by turning the MAIN SWITCH
"I ON": the POWER LED (2) lights up turning yellow;
x
c) press
: the POWER LED (2) turns green and the com-
pressor switches on; the dew point is displayed.
Y
Scroll Compressor: if connected with the wrong phase se-
quence it turns in the opposite direction, with the risk of being
damaged (in this case it is very noisy); immediately invert the
phases.
Y
Fans: 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
flow); immediately invert two phases.
d) Wait 5 minutes, then slowly open the air inlet valve;
e) slowly open the air outlet valve: the dryer is now drying.
4.3
Operation
a) Leave the dryer on during the entire period the air compres-
sor is working;
b) the dryer operates in automatic mode, therefore field settings
are not required;
c) in the event of unforeseen excess air flows, by--- pass to avoid
overloading the dryer;
d) avoid air inlet temperature fluctuations.
4.4
Stop
a) stop the dryer 2 minutes after the air compressor stops or in
any case after interruption of the air flow;
b) make sure compressed air does not enter the dryer when the
dryer is disconnected or if an alarm occurs.
x
c) Press
: the POWER LED (2) turns yellow again;
&
d) Turn the MAIN SWITCH
to "O OFF" to switch the
power off.
2
PDRD250
&
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