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7.4.
ELECTRICALCONNECTIONS
The machine must
be
connecled
to
the mains power
supdy
in
accordance with the laws and regulations
in
force
in
the country of installation.
Voltage, frequency
and
the number of phases
must comply urith
the values indicated
on
the machine data
plate.
lnput voltage
musit
always
remain
within lhe tolerances indicated
in
the eleclricel diagram.
Unless othenilise indicated, frequency lolerance
is
equal
to
+/-1
% of
its
rated
value
(+/-206
for short periods).
For
three-phase models, voltage musl be symmelrical (lhe effective
\roltage
and phase angle values between consecutive phases
must
be
equal).
ln parlicular, unless olherwise indicaled, the maximum difierence permitted between phase voltages
is
2%, calculated for each phase according
to the
formula
Max' difference in
phase
voltage
from vavg
,, oo
Vavs= 3ys1"n" rnase
vorrase
Vavg
For
singlephase
models, vohage must be supplied between
the
phase and neulral and
the
latter conductor musl be earthed
in ils ovn
trans{ormation cabin (TN system
accrrding to IEC 364)
or by
the electricity provider
(TT
system according to
IEC 364).
The
phase
and earlh conduclors must not
be
exchanged.
For
mains power input:
/i\
el
connecl lhe machine
(PE
terminal
in
lhe electrical
panel) to
the earth system
of
the building;
A
f(
an
automatic inleEuption in
the
evenf
of
insulation faults (protection
agaanst
indirecl
contad
according
lo
IEC
3O4)
by
means
d
a
e!gg!-@!
@fggEgl
(normally with a rated cut-in current
of 0 03 A);
provide
protec{ion
against
dired
contacl
of at
leasl lP2X or IPXXB
upline
lrom the power
cable:
fit
a
device protecting the power cable
or
the cable supdied with the machine from overcurrent (short-circuit) (see indication
in
the electrical diagram) upline from the
porer
cable;
Use conduclors which can carry
lhe
maximum current required at
the
maximum ambient operating temperalure, according
to the
type of installation chosen (lEC
364-$523)
(see indication
in
the eleclrical diagram).
lndicalions
in
the
el*trlcal
dlagram.
a)
maximum permitted size
of gG
fuse.
Generally speaking, the fuses can
be
replaced with an aulomalic
slryitch
adiusted
to
the maximum current absorbed
by
lhe
machine (contacl the manufaclure
if
necessary);
b)
cross-seclion
and
type of
power
cable (unless already supplied):
tr
inslallation: insulated conduclors, ducted multi-pole cable, overhead
or
attached to the wall (type C according
to
IEC 364-5-523 1983)
or
not
in contad
with
any
other
cable;
O
operating lemperalure: maximum ambient operating temperature
of
the
unit;
O
lype
of
cable: copper conduclors,
PVC
insulation to 70'C
/
158'F (unless specilied) or
EPR
insulation to
90'C /
194"F
.
2
3
4
5
8.
START
UP
A
Before
starting up or operating these dryers
be
sure that all personnel
have read
and understood the chapter
4
of
lhls
manual.
1.
Check
that the
dryer
on-ofl valves are dosed
and that
the
by-pass
valve
is open.
2.
ll lhe
unit is
equipped with
an
"intelligent' condensate discharge
system
($3
),
check that il
is
corredly
installed (S3
).
3
Air-cooled condenser models
($3
):
o
Check
that
the
amtienl
temperature
is
within lhe range indicated
on
the data
date
of
the
unit.
4
Watercooled
condenser models (S3
):
.
Open
lhe
dryer
water inlel
vahre.
.
Open
the dryerwater
outlet
valve.
.
Check
that
the
availaHo head pressure al the dryer (ditference between the eroling water inlet and outlet pressures)
is at
least
1
to
1.5 bar
5
Check
lhat the
main
swilch
on
the dryer panel
is in
the "O" position.
6
Power
the dryer
by
means
c,
the line proteclion device.
7
Turn the main switch
of
the
dryer
to the
"1"
position.
8
v\ihen
the unil
is
powered, one
of
the
LED'S on
the elecironic board lights up (S9
).
9.
Aner switching
on
the
eledronic
board
and
the
pt+set
delay, the refrigerant compressor slarts working for several minutes.
'lO.
Air-cooled condenser models
($3
):
11
ln models without
a
fan pressure switch (S3
), the
fan starts immediately together with lhe compressor
ln models with
a
fan pressure switch (S3
),
lhe fan starts
when
the refiigerant fluid condensing pressure reaches lhe tripping value and slops when the pressure
returns to
the
reset
value
(S1O
).
ln
the threq'phase models (S3
),
make
sure
the fan rotates
in
the
right
direction.
The cooling air
must enter
the dryer through the grille
next to
the condenser.
lf
necessary, inverl two phases to reverse the direciion of rotation.
Water-cooled condenser models (S3
):
Check
that the cooling waler temperature
is
within the range indicated on the data
plate of
the unit
Calibrate
the
water pressure valve
es
described
in
cfiapter
12.
Check
lhat the compressor stops when
the
thermal mass reaches the
sot
temperalure.
Slowly op€n
tho
dryer
inlet
valve
to pressurise
it.
Slowly open
lhe
dryer
outld
vahre.
Closa
the dryer
by-pa$
valve.
Chsck
thal the
compressed
air inlet
temperature
is at or
belorv
lhe
temperature
for
which
the
dryer
was
selecled.
Wth the
compressed
air
flowing,
the
der,-point
temperalure
should
lie
between
0'C (32"F) and 4"C
(39'F);
Briet
excursions outside this range may occur when lhere are
big
flucluations in
air
floiv without compromising the operation
of
the dryer.
Press
the condensale discharge manual test button and check
that
the discharge solenoid
vdw
opens.
lf
the
unit is frtted
wilh
a
timer condensate discharge syslem (S3
), check
lhaf
the
solencid valve opens again afler the
presd
delay.
lf
tho
unit is
fitted wilh an
'intelligent'
condensate discharge sySem
($3
),
make sure
il
works properly.
12.
13.
14.
15.
16.
17.
't8.
19.
The dryer
is notv ready
for
normal
operation (S13
).
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