Munters EM52 Manual De Uso Y Mantenimiento página 9

fig.1
The fans must be installed at a height of not less
than 2.7 m from the ground. If they are installed
at a lower height, the fans must be fitted with the
optional safety mesh supplied by the manufacturer, to
protect the internal rotor. Failure to install the safety mesh
releases manufacturer from all liability and shall be
considered an improper use of the machine.
There must be no obstacle neither in front or
behind the fans. The outgoing airflow must be
kept free at least of a length of 3-times fan
diameter and the ingoing airflow must be kept free at least
in a radius of 1.5 m distance in front of the fan.
Irrespective of the place of installation, suitable indelible
warning signs are attached to the fan, warning of danger
and giving instructions to remain at a safe distance not to
place hands inside the shutter and not to run in proximity of
the fan. The warning signs are yellow, self-adhesive and
indelible. They are fitted to the front and rear of the fan, and
marked with the numbers A-1997 and B-1997 (see fig.1).
The area adjacent to the fan in the premises from which air
is being extracted must be kept clear to allow the air to exit
freely. It is also prohibited for anyone to remain in this area,
because of the presence of organic gases and dust which
may be present in the airflow.
The fans must be installed to carry out
extraction or an internal circulation of the air
present in the area, and must not operate under
pressure. It is also permissible to install the fan in a
horizontal position.
Installation of the fan. Fans have to be installed
taking care to have central support placed in
correspondence of a concrete wall or a
dedicated metal frame, which has to be strong enough to
support the weight of the fan. This is mandatory for
guaranteeing the correct functioning of the fans eliminating
vibrations and avoiding possible malfunctioning.
fig.2
5.2 Installing Series EM fans
If the fan is fixed directly to a metal structure, M8 bolts type
8.8 must be used, screwing them into the threaded inserts
provided for the purpose on the bodywork (two per side). If
the fan is installed in a masonry structure, an iron outer
frame must be constructed (not supplied with the fan), with
a 60 mm L-shaped profile at least 5 mm thick, with suitably-
sized clamps. When the outer frame is properly built-in, i.e.
perfectly level and upright, insert the fan, screwing four M8
bolts type 8.8 (not supplied with the fan) into the threaded
inserts provided on the sides of the bodywork, two per side.
5.3 Installing Series EMS fans
For installing type EMS fans in metal or masonry structures,
the procedures described on the previous page for model
EM fans also apply. If installed for recirculating air, it is
sufficient to attach chains or cables to the M8 threaded
holes at the ends of the top cover.
5.4 Connection to the electrical system
The fan is supplied without a command and control circuit,
but with all the internal electrical connections already made.
At the fitting stage, the installer must set up a control panel
in compliance with the requirements of standard IEC EN
60439-1, and arrange the wiring of the fan in accordance
with the instructions in standards IEC EN 60204-1 and IEC
60364 (see fig.2).
The electrical panel of the fan must generally be equipped
with the following devices (bearing EC marking as per
directive 2014/35/UE):
• lockable isolating switch;
• magnetothermic switch (chosen to suit the power of the
motor); the need to fit a switch of differential type
depends on the configuration of the electrical system
supplying the fan: it is the installer's responsibility to
make
instructions in standard IEC 60364;
• red emergency stop button, mushroom type, provided
with mechanical locking and release by turning (in
compliance with UNI EN ISO 13850); operating the
button must bring about the electromechanical isolation
of the power supply to the electric motor (category 0/1
according to IEC EN 60204-1);
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