Rittal 3237 Series - Replacing the Pleated Filter; Inspection and Maintenance

Rittal fan-and-filter unit assembly and operating instructions 9
Inspection and maintenance
EN
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.
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 o 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