Idiomas disponibles
Idiomas disponibles
Enolish
13.2.
MAINTENANCE
,i,
Berore
starting up
or
operatlng these dryers
be
sure
that all
personnel have
read
and
understood
/
!
\
chapter4
ofthis
manual.
These dryers will give many years
of
trouble-free
service
if
they are properly maintained and serviced
13.2.1.
Dryer access
To access lhe components
of
lhe
refrigerant circuit
remove
lhe side-screws fixing the top cov€r
to
the side panels
of
the casing.
Afier removing lhe lop cover, access the components
of
the elecldcal panel by removing the
screws
fixing its proteclive cover
to
the front panel
13.2.2.lnspection and maintenance schedule
Air-cooled
Water-cooled
IMPORTA'{T:
The
abo\re
maintenance schedule
is
based
on
average operating conditions. ln some cases it
may
be
neoessary
to increaso maintenance frequency.
OPERATION
1
dav
1
month
6
monlhq
annual
Check there are
no
alarm signals.
a
Check
the dew-point indicator.
Wth
compressed air
florving,
check thel the air
outlet
temperature lies between
0'C
(32"F)
and
4'C
(39'F);
Brief
excursions outside this range may occur when lhere are
big
flucluations in
air
flow without compromising the operation of
the
druer-
Push
the manual condensate discharge button
and
check
the
valve discharges correcily.
a
lf
the dryer
is
frtled with
a
timed condensate discharge system, ,ind out
if
there is an excessive ptoduciion of condensate and,
if
so, increase the opening (ON) time
d
the valve
lt ake srrre
lh.
$lenoid
ldve
omns
6rec{lv
obseruino
lhe limes sel wilh the eleclronic board
a
Check that
the
compressed
air inlel
temperature is lower than
the
limit for
which
dryer
was seleded
(normally
3$40"C 9S
10a"Fl
a
Wth lhe
compressor running, check
the
upper part is nol
too
hot (over 50"C
I
'122'F
approx.)
Check current consumption of
a
Remove, clean and pul
back
the condensate discharge
system
riller.
lf
the tilter
is
always clogged
with
material
it
may
be
necessary
to
dismantle
and clean the whole
condensale discharge
svslem.
a
Make a visual inspection o,
the
refdgerant circuit to make sure
the
piping has not deleriorated and lhat there are no traces of
oil
which
mav
indicale
a
leak of refrioerant.
a
Check
the condition and safety of piping connections
a
/i\
9D
tn
the
models
in
which
the
intake
and
delivery pipes are
fixed to the
refrigeration comp.essor
wilh ring
nuts, use
a
a
Check
the condition and safety
of the
wiring and eledrical conneclions.
a
a
Check that the ambient
air
temperature
is lower
than the limit
used
to selecl the dryer (normally
25-30'C
77€6'F).
Check
the area
is
well ventilated
a
Check
that the fan is
svrritched
on automalically
and
that
it
works silently
Clean the condenser fins wilh
a
jet
of
clean compressed
air.
Check lhat the orilles are
free
from dirt and
anv
other obstruclions.
a
Clean the condenser fins with a
mild
detergent.
Check that the cooling water temperature
is lower
lhan the value
used
lo
selecl the dryer (normally
2S30'C
77-86"F).
a
Check that the available head pressure
for
the dryer (difference between the inlel and outlet cooling water pressure)
is at
least
1-'l 5 bar
a
Vvhen
the cooling water
is
very hard (high
concenlration
of
carbonates,
calcium and
magnesium
salts
as
in the case of
circuits with cooling towers) remove
the
scale from
the
inner surface of
the
@ndenser (waler side) with
a
suitable chemical
makind
3ura
il
dms
nol
read
wilh
momr
and
erbon slel
't6
Capítulos
