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7.2
Replacing the pleated filter
◾ First press the catch of the louvred grill (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 standard fleece filter contained in the
scope of supply; it is not required.
◾ Place the pleated filter in the louvred grille. The "Top"
logo indicates the insertion direction (see fig. 7)
Fig. 7:
Installing the IP 54 pleated filter
◾ To seal properly, ensure that the side tabs of the
pleated filter are placed over the ribs of the louvred
grille.
Fig. 8:
Positioning of the side tabs
◾ For IP 55 only: place the IP 55 absorbent fleece sup-
plied with the pleated filters on the previously placed
pleated filter (see fig. 9). The installation direction of
the absorber is not critical.
Rittal fan-and-filter unit assembly and operating instructions
Inspection and maintenance
Fig. 9:
Installing the IP 55 pleated filter
◾ Now push the louvred grille back onto the enclosure
until it snaps audibly into position.
8
Inspection and maintenance
Risk of electric shock!
The unit is live.
Switch off the power supply before
opening, and take suitable precautions
against it being accidentally switched
back on.
The built-in, maintenance-free fan is mounted on a
friction bearing (3237.xxx) or ball bearing (3238.xxx to
3245.xxx), and is protected against humidity and dust,
and equipped with a temperature monitor.
The life expectancy is at least 40,000 operating hours
(L10, 40 °C). The fan-and-filter unit is thus largely main-
tenance free.
From time to time, the components may need to be
cleaned using a vacuum cleaner or compressed air if
they become visibly dirty.
Any stubborn, oily stains may be removed using a
non-flammable detergent, such as degreaser.
Caution!
Risk of fire!
Never use flammable liquids for clean-
ing.
Sequence of maintenance measures:
– Check the level of dirt.
– Filter soiling?
Replace the filter.
– Fan membranes soiled?
Clean.
– Check the noise generation of the fan.
– Compressed air cleaning
EN
9
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