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Verfügbare Sprachen
ENG
1. Intended use of the heat exchanger.
The heat exchangers described in this manual
are designed and made to cool control panels
in all those cases where you want to prevent
ambient air, saturated with contaminants and
dust, getting inside the panel.
2. Updates.
The manufacturer reserves the right to update
its product and relative manuals based on tech-
nical progress without prior notice. Please note
that at the time of sale, this manual and relative
product cannot be considered inadequate only
because they are not subject to above-men-
tioned updates.
3. Technical features.
(Figures F. 65.0 and F. 69.0)
4. Supply.
Inside the packaging you will find:
1
Cooling unit
1
installation, operating and maintenance
manual with CE conformity certificate
1
test certificate
1
drilling template
8
M6 nuts
1
8
6.4x18 flat washers
2
8
M6x35 dowels
3
1
10 x 5 mm self-adhesive sealing strip
4
1
transparent flexible hose for service
5
condensate discharge 12x2mm x2.5m
1
coloured flexible hose for emergency
condensate discharge 12x2mm x1.5m
6
2
angled hose fitting for condensate
discharge hose
4
M6 (M8) eyebolts
7
...
(figure
F.81.0)
1
4
...
(figure
F.85.0)
5
7
5. Prior to assembly.
•
During transport and storage the cooling
unit must be kept in the position clearly in-
dicated on the packaging (figure F.76.0),
and must not be exposed to temperatures
higher than 70°C.
•
Upon receipt, check the packaging has not
been damaged during shipping.
•
Ambient air temperature, where the enclo-
sure is to be installed, must be no higher
than 50°C and should never exceed the
cooling unit's maximum operating tem-
perature which is specified on its rating
plate. The unit must be positioned far away
from heat sources and flows of hot air.
•
Make sure switchboard protection level is
IP54 or higher. Should this not be the case
excessive condensation could form. Con-
sequently seal well all areas where cables
pass and all other openings in the enclo-
sure.
•
Check that the external environment does
not contain excessive concentrations of
contaminating solids and/or strong chemi-
cals.
•
Check that the flows of air leaving and en-
tering the cooling unit are not obstructed
by walls or objects that are too close. For
this purpose, in the case of the external air
flow, verify the minimum distances (figure
F.77.0), while in the case of the internal air
flow, make sure there are no obstructions
caused by the switchboard components.
•
The supply voltage available must corre-
spond to the features given on the cooling
unit's rating plate.
•
The cooling unit must be installed in the
position indicated. Maximum permitted de-
viation from the vertical is 2°.
•
Make sure the top of the enclosure can
withstand the weight. If necessary rein-
force the its structure.
•
Before making the holes and slits on the
enclosure make sure the fixing elements
and couplings will not interfere with the
equipment inside the enclosure itself.
6. Assembly.
Disconnect power before starting any work in-
side the switchboard. Drill the necessary holes
on the enclosure (figure F.80.0). To make drill-
ing easier, use the 1:1 scale drilling template
included with the supply. Fit the sealing strip on
the cooling unit on the side connected to the
enclosure. Now fix the cooling unit as instructed
in the relative diagram (figure F.81.0). To lift the
cooling unit safely, use the 4 M6 eyebolts sup-
plied, inserting them in the relative threaded in-
serts situated at the top of the machine (figure
F.78.0).
7. Condensate discharge hose.
The condensate which, depending on the am-
bient temperature and humidity conditions,
forms on the exchanger that cools the enclo-
sure air, is not a malfunction but a normal phe-
nomenon of the cooling unit. The condensate is
taken outside through two hoses, a service
hose and a emergency one, located at the bot-
tom of the cooling unit.
7.1 Connecting the service discharge hose.
Connect the supplied 2,5 m length of transpar-
ent plastic hose to the service discharge outlet
(figure F.85.0). Cut it so it covers the distance
from the fitting to the edge of the enclosure's
roof. Connect the hose segment to the supplied
elbow joint. Connect the other end of said el-
bow joint to the remainder of the hose which is
to convey the condensate to the bottom of the
enclosure.
7.2 Connecting the emergency discharge
hose.
Connect the supplied 1,5m length of coloured
plastic hose to the emergency discharge outlet
(figure F.85.0). Cut the hose so it covers the
distance from the outlet fitting to the edge of the
enclosure's roof. Connect the hose segment to
the other elbow joint supplied. Connect the
other end of the elbow joint to the remainder of
the coloured hose which is to convey the con-
densate to the side of the enclosure.
7.3 Correct execution
Make sure the condensate flows without any
hindrance. Avoid horizontal lengths of more
than 0.5 metres, lengths with a reverse gradient
and the accidental formation of traps (figure
F.83.0). The end of the condensate discharge
hose must always be free, never immersed, so
never place the end of the discharge hose in-
side condensate collection trays (figure F.84.0).
If the cooling unit is used with the doors of the
enclosure open, excessive quantities of con-
densate will form and this is an unauthorised
condition of use (figure F.82.0). We suggest us-
ing a position switch on the door that will stop
the cooling unit if the door is opened.
8. Electrical connection.
Attention! The electrical connection must be
done by specialised and authorised person-
nel. Switch power off to the enclosure be-
fore making the connection. Check that the
available supply voltage corresponds to the
characteristics given on the cooling unit's data
plate. The supply of electricity to the cooling
unit must be protected by an isolating de-
vice/fuse or circuit breaker with a distance be-
6
tween the contacts of at least 3 mm when open
according to the indicated settings (figure
F.69.0). Wire to the terminal board following the
instructions on the wiring diagram and paying
attention to the terminals (figure F.55.0). After a
stop the cooling unit must not be started again
immediately. For this reason we suggest using
a timed control that delays restarting 3 minutes.
Disconnect the cooling unit before electrically
testing the enclosure.
9. First start up and adjustment.
If, prior to installation, the cooling unit was left in
an incorrect position (figure F.76.0), wait at
least 8 hours before switching it on otherwise
30 minutes are more than enough for the oil to
return to the compressor after which the cooling
unit can be powered. The enclosure air suction
fan starts working immediately, rendering the
temperature even inside the enclosure. If this
temperature is higher than the threshold value
set on the adjustment thermostat both the com-
pressor and external air fan start working, caus-
ing the cooling cycle to start. The latter stops
when the inside temperature reaches the low
limit of the operating differential that has a fixed
value of 4 K. The thermostat is factory set at
35°C. To alter the set temperature remove the
cover and access the thermostat (figure
F.33.0). With the graduated scale, from 20 to
46°C, you may alter the set temperature as
wanted. To save energy and minimise the pro-
duction of condensation we recommend not to
go below 30 °C. Put the cover back in place
once the set temperature has been altered.
10. Maintenance.
Caution! Before embarking on any mainte-
nance work, switch current off to the enclo-
sure. The cooling unit is the low maintenance
type so no filter change is required. The only
jobs that need doing are the internal compo-
nents with compressed air at a maximum pres-
sure of 4 bar (figure F.89.0) and which should
be checked regularly:
Job
Check the external air heat
exchanger and clean if
necessary
Check effectiveness of the
condensate discharge
Check the fans for any
overheating or excessive
vibrations
Any repairs that may need doing must only be
done by specialised and authorised personnel
and using original spare parts only.
11. Technical information.
11.1 Operating principle.
The cooling unit for electric enclosures works
on the basis of a refrigeration circuit consisting
of four main components: compressor, evapo-
rator, condenser and expansion device (figure
F.36.0). The circuit is hermetically sealed and
the refrigerant circulates inside it. The refriger-
ant used is R134a, chlorine free and harmless
for the ozone layer. The unit is divided into two
hermetically separated sections where the am-
bient air and enclosure air do not come into
contact with one another and are treated sepa-
rately. The compressor (CP) compresses the
refrigerant and takes it to a high pressure and
high temperature. The compressor then pushes
the refrigerant through a heat exchanger coil,
called condenser (C), where it is cooled by am-
bient air thus passing from the gas to the liquid
Frequency
Every 3
months
Every 3
months
Every 6
months
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