Control; Safety Equipment; Filter Mats; Intended Use - Rittal 3237 Series Assembly And Operating Instructions Manual

3.1.2

Control

Rittal fan-and-filter units may be controlled more effi-
ciently using a thermostat (Model No. 3110.000), digital
temperature display (Model No. 3114.200), tempera-
ture-dependent speed control (Model No. 3120.200,
3235.440, 3235.450) and/or hygrostat (Model No.
3118.000).
Note:
The control unit 3120.200 can only be used
with single-phase AC units. The control
units 3235.440 and 3235.450 can only be
used with fan-and-filter units with integrated
control interface.
(EC fan-and-filter units with air throughput
above 180 m³/h. Model No. 3240.500,
3241.500, 3243.500, 3244.500, 3245.500
and 3245.508).
3.1.3

Safety equipment

The fan is equipped with thermal winding protection
devices for protection against excess current and, in
some cases, against overtemperature. For rotary cur-
rent fans, the winding protection is located in the star
earthing of the motor.
3.1.4

Filter mats

The fan-and-filter unit/outlet filter is supplied with an
installed standard fleece filter mat. The filter must be
checked regularly in accordance with the level of dust
exposure and replaced as necessary. To increase the
protection category and for presence of dust with a
grain size of <10 μm, we recommend the use of IP 55
pleated filters.
Note:
The air throughput volume will be reduced.
Special filter mats are required for EMC
fan-and-filter units (see section 13 "Acces-
sories").
3.2

Intended use

Rittal fan-and-filter units were developed and designed
in accordance with the state of the art and the recog-
nised rules governing technical safety. Nevertheless, if
used improperly, they may pose a threat to life and limb
or cause damage to property. The unit is only intended
for ventilating enclosures and electronic cases. Any
other use is deemed improper. The manufacturer will
not be liable for any damages caused as a result of
improper use, or for incorrect assembly, installation and
use. All risk is borne solely by the user.
Proper usage also includes the observation of all valid
documents and compliance with the inspection and
servicing conditions.
Rittal fan-and-filter unit assembly and operating instructions

Assembly and connections

3.3

Scope of supply

The fan is supplied in a packaging unit in a fully assem-
bled state and ready to connect.
◾ Please check the scope of supply for completeness.
Quantity Description
1 Fan-and-filter unit
4 Mounting screws (not for 3237.1xx
to 3239.1xx)
1 Assembly and operating instructions
1 Drilling template, self-adhesive
1 Standard fleece filter mat or EMC
filter mat
Tab. 1: Scope of supply
4 Assembly and connections
4.1

Choosing the installation site

When choosing the installation site for the enclosure,
please observe the following:
– The site for the enclosure, and hence the arrange-
ment of the fan-and-filter unit, must be carefully
selected so as to ensure good ventilation.
– The site must be free from excessive dirt and mois-
ture.
– Fan-and-filter units must always be installed on verti-
cal panels (door or walls).
– The ambient temperature must be lower than the
permissible enclosure interior temperature.
– The mains connection data as stated on the rating
plate of the unit must be guaranteed.
4.2

Assembly instructions

4.2.1

General

– Check the packaging carefully for signs of damage.
Any packaging damage may be the cause of a sub-
sequent functional failure.
– The fan-and-filter and outlet filter must always be
mounted on an enclosure in order to ensure air
exchange.
Note:
The outlet filter should be at least the same
size as the fan-and-filter unit.
– The enclosure must be sealed on all sides (IP 54). If
the enclosure has a leak, unfiltered, contaminated air
may enter the enclosure, depending on the direction
of airflow of the fan.
– To allow the louvred grille to be opened without prob-
lem when the fan-and-filter units are bayed vertically,
a minimum separation should be observed.
EN
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