Rittal EC fan-and-filter unit assembly and operating instructions
5
Assembly and connections
EN
3.1.2 Control
Rittal fan-and-filter units may be controlled more effi-
ciently using an enclosure internal thermostat (Model
No. 3110.000), digital temperature display (Model No.
3114.200), temperature-dependent speed control
(Model No. 3235.440, 3235.450) and/or hygrostat
(Model No. 3118.000).
The Rittal EC fan-and-filter units 3240.500 to 3245.510
as well as 3245.600 possess an integrated control
interface (0 – 10 V or PWM input and tacho signal out-
put). These units can be connected either via the Rittal
control unit (Model No. 3235.440), the Rittal sensor for
speed control (Model No. 3235.450) or else directly via
a control system (e.g. PLC) provided by the customer,
enabling the speed of the fan to be both controlled and
monitored.
The corresponding connection diagram is to be found
3.1.3 Safety equipment
The fan is equipped with thermal winding protection
devices for protection against excess current.
3.1.4 Filter mats
The EC fan-and-filter unit/outlet filter is supplied with
an installed standard chopped-fibre 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 IP55 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-
3.2 Intended use
Rittal EC fan-and-filter units were developed and de-
signed in accordance with the state of the art and the
recognised rules governing technical safety. Never-
theless, 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 manu-
facturer will not be liable for any damages caused as a
result of improper use, or for incorrect assembly, instal-
lation 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.
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
EC fan-and-filter unit
4
Mounting screws (not for 3238.5xx
to 3239.5xx)
1
Assembly and operating instructions
1
Drilling template, self-adhesive
1
Standard chopped-fibre 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 EC 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.
– EC fan-and-filter units must always be installed on
vertical 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 EC fan-and-filter unit 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 EC fan-and-filter unit.
– The enclosure must be sealed on all sides (IP54). 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
problem when the EC fan-and-filter units are bayed
vertically, a minimum separation should be observed.
– This is either 15 mm measured between drilling tem-
plates or between the associated mounting cut-outs
in accordance with the following table:
