Munters EM52 Manual De Uso Y Mantenimiento página 7

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 2006/95/EC):
• 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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