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3
Installation
3.1
Procedures
Install the dryer inside, in a clean area protected from direct at-
mospheric agents (including sunlight).
Y
Comply with 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.
Y
Do not invert the compressed air inlet and outlet connec-
tions and observe the maximum tightening torque (N x m) as spe-
cified in par. 8.3.
3.2
Operating space
Y
Leave a space of 60 inches (1.5 m) around the unit.
3.3
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.
3.4
Electrical connection
Use approved cable in conformity with the local laws and regula-
tions (for minimum cable section, see par. 8.3).
Install a differential thermal magnetic circuit breaker with
contact opening distance ² 0.12 inches (3 mm) ahead of the sys-
tem (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
The dryer is supplied either with a float 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. 8.8).
For timed and electronic drains: refer to separate manual sup-
plied with the dryer for specific details concerning the condensate
drain.
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 commissioning 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 by means of the
14
main power switch
; the power lamp will illuminate
(green);
b) after at least 5 minutes slowly open the air inlet valve and
subsequently open the air outlet valve: the dryer is now
performing its air drying function.
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;
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) do not allow compressed air to flow through the dryer when
the latter is not running;
PDRD10 ---PDRD100
14
c) switch off at the main power switch
out and the compressor stops.
5
Control
14
11
Dewpoint indicator
11
Main power switch
14
The dewpoint indicator can show one of three conditions:
blue:
dewpoint too low
green:
dewpoint ideal
red:
dewpoint too high
2
. The power light goes
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