Safety Notes; Device Description; Functional Description; How It Works - Rittal SK 3237.xxx Assemble And Operating Instructions

2 Safety notes

Please observe the following general safe-
ty notes when assembling and operating
the unit:
– Assembly, installation and servicing may
only be performed by properly trained
specialists.
– Do not obstruct the air inlet and outlet of
the fan-and-filter unit inside and outside
the enclosure (see also section "4.2.2
Layout of the components in the enclo-
sure", page 7).
– The heat loss of the components in-
stalled in the enclosure must not ex-
ceed the specific air throughput of the
fan-and-filter unit.
– Fan-and-filter units must always be in-
stalled on vertical panels (door or walls).
– The louvres must always have their
opening pointing downwards.
– Use only original spare parts and acces-
sories.
– Do not make any changes to the fan-
and-filter unit other than those de-
scribed in these and other applicable
instructions.
– The fan-and-filter unit must only be con-
nected to the mains with the system
de-energised. Connect the pre-fuse
specified on the rating plate.
– Changes to the direction of airflow must
only be carried out with the system de-
energised.
– Changes to the positioning of the mains
connection must only be carried out with
the system de-energised.
– Never insert your fingers into the rotat-
ing fan wheel.
– Electrical connection and any repairs
may only be carried out by authorised
specialist personnel.
Rittal fan-and-filter unit assembly and operating instructions
2 Safety notes

3 Device description

Depending on the model chosen, your fan-
and-filter unit may vary in appearance from
the illustrations contained in these instruc-
tions. However, the functions are identical
in principle.
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4
5
Fig. 1: Device description
Key
1 Function logo
(to release the louvred grille)
2 Louvred grille
3 Filter box with filter mat
4 Fan housing
5 Variable electrical connection

3.1 Functional description

The fan-and-filter unit in conjunction with
the corresponding outlet filter(s) is used to
dissipate heat loss from enclosures and
ventilate the enclosure, thereby protecting
temperature-sensitive components. This is
achieved via the direct infeed of ambient
air, the temperature of which must be less
than the admissible enclosure interior tem-
perature. The system is fitted into pre-
pared cut-outs in the door or walls of the
enclosure.

3.1.1 How it works

The fan-and-filter unit is comprised of the
following four main components: Fan mo-
tor, filter box, louvred grille with function
logo and filter medium.
EN
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