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Commissioning
EN
Fig. 5:
Release the bayonet connection
5.3
Installing the control line
To permit control of the EC fan-and-filter units via an
external control unit (e.g. 3235.440 or 3235.450), the
units 3240.5xx to 3245.5xx possess a separate termi-
nal for connection of a control line.
◾ To this end, release and remove the jumper between
the "+10 V" and "0 – 10 V/PWM" connections.
For this purpose, use a screwdriver with a 3.5 x
0.5 mm blade.
◾ Use the screwdriver to open the terminal and insert
the connection cable of the control line in accord-
ance with the connection diagram on page 16 (line
cross-section 0.8 – 1.5 mm², fine wire).
◾ Remove the screwdriver.
Note:
For operation without control line, the jump-
er must be left in the connection clamp. The
unit is then operated at maximum speed
(see fig. 15).
5.4
Changing the direction of airflow
The direction of airflow blows into the enclosure from
the outside as standard.
Should it become necessary to change the direc-
tion of airflow for technical reasons (space, specific
component air routing etc.), this is easily achieved.
Simply release the fan housing and rotate it through
180°. To release, please follow the same procedure
as described under section 5.2 "Rotating the voltage
connection", page 7.
Please also observe the instructions outlined under
section 4.2.1 "General", page 5.
6
Commissioning
◾ Once all the assembly and installation work is com-
plete, switch on the power supply to the EC fan-and-
filter unit.
8
2.
1.
The EC fan-and-filter unit operates automatically, in
other words, the fan will start up once the power has
been switched on.
Note:
EC fan-and-filter units start running with a
delay of approx. 15 sec.
7
Installing and changing the filter
The fan-and-filter unit and outlet filter are supplied as
standard with a standard chopped-fibre filter mat for
the pre-filtering of dry coarse dust and lint in the ambi-
ent air.
To increase the protection category and for presence of
dust with a grain size <10 μm, we recommend the use
of pleated filters (see section 13 "Accessories").
The filter should be checked at regular intervals in
accordance with the level of dust exposure (recom-
mended: at the latest after 2,000 operating hours) and
replaced as necessary.
Note:
Use only original Rittal filters which bear the
Rittal logo in order to safeguard the desig-
nated protection category, air throughout
and operating approvals.
The chopped-fibre filter mat supplied for
the fan-and-filter unit must be removed and
disposed of when a pleated filter is used.
Risk of injury!
Only change the filter mat while the fan
rotor is stationary.
Never insert your fingers into the fan
rotor.
To insert or replace the filter, proceed as follows (direc-
tion of airflow: drawing from outside and blowing into
the enclosure).
7.1
Replacing the chopped-fibre filter
◾ First press the catch of the louvred grille (Rittal logo)
up slightly with one finger (see fig. 6).
◾ Once it is released, the louvred grille can be dropped
open by approx. 70° or 90°.
◾ Remove the dirty chopped-fibre filter mat and place
the new chopped-fibre filter mat in the filter housing.
◾ When installing, ensure that the roughened side with
the Rittal logo points inside.
◾ Now push the louvred grille back onto the enclosure
until it snaps audibly into position.
Rittal EC fan-and-filter unit assembly and operating instructions
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