Notes On Electrical Installation; Connection Data; Overvoltage Protection And Supply Line Load; Pe Conductor Connection - Rittal SK 3237.xxx Assemble And Operating Instructions

4 Assembly and connection
EN
Fig. 2: Remove the louvred grille
• If transporting over long distances or to
a different installation site, we strongly
recommend that you screw-fasten the
fan to prevent it from falling out of the
mounting cut-out.
• The fan-and-filter unit is a rotating com-
ponent that may transfer vibrations and
oscillations. Suitable design measures
to dampen vibrations should be imple-
mented in advance before constructing
the system.
• The protection category can be in-
creased by means of the following
accessories:
– IP 55 by using an additional fine filter
mat or hose-proof hood.
– IP 56 by using a hose-proof hood.
Note:
To increase the protection cate-
gory, an additional fine filter
mat or hose-proof hood must
be used in both the fan-and-
filter unit and the outlet filter.
8

4.4 Notes on electrical installation

SK 3237.xxx
When performing the electrical installation,
SK 3238.xxx
it is important to observe all valid national
and regional regulations as well as the pro-
visions of the responsible power supply
company. Electrical installation must only
be carried out by a qualified electrician
who is responsible for compliance with the
existing standards and regulations.
SK 3239.xxx

4.4.1 Connection data

SK 3240.xxx
– The voltage and frequency of the con-
SK 3241.xxx
nection must correspond to the values
SK 3243.xxx
SK 3244.xxx
stated on the rating plate.
SK 3245.xxx
– Electrical connection and any repairs
may only be carried out by authorised
specialist personnel.
Use only original spare parts!
– For 1~ and 24 V (DC) fans, install the
pre-fuse prescribed on the rating plate
(circuit-breaker or slow fuse) to protect
against short-circuiting.
– With the rotary current variant, install the
pre-fuse prescribed on the rating plate or
a circuit-breaker/back-up protection to
protect against short-circuiting, and set
it to the prescribed rating value.
– The direction of airflow and the direction
of rotation are each marked on the mo-
tor housing with an arrow.
– If a phase is missing, the fan will not
start. If the rotary field is incorrect, the
fan will run backwards.
4.4.2 Overvoltage protection and
The unit does not have its own overvoltage
protection. Measures must be taken by
the operator at the supply end to ensure
effective protection against lightning and
overvoltage. The mains voltage must not
exceed a tolerance of ±10%.

4.4.3 PE conductor connection

The PE conductor connection must be
connected to the PE conductor system of
the overall system.
Rittal fan-and-filter unit assembly and operating instructions
supply line load