Airflow EPO-V Series Handbuch für Installation, Gebrauch und Wartung - Seite 5

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In front of and behind a circular heater there must be a straight duct whose length is at least double the diameter of
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the heater. In the case of a rectangular heater the length of the straight duct must be at least equal to the diagonal of
the heater. Within this length there must be no widening or narrowing of the cross section, no junctions or bends in
the duct (see the figure).
min.
2x  D L
Provided that the above conditions are met, two heaters may be connected in series one after another.
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In the case of horizontally positioned circular heaters the casing of the control unit must always be above the heater,
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while in rectangular heaters it is always on their side, i.e. not above or underneath (see the figure).
It is possible to provide the heater with thermal insulation; however, it must remain permanently accessible.
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On the inlet to humid or aggressive spaces a return damper must be installed and no return air flow through the
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heater may occur. The intake air must not contain any dust, impurities or corrosive substances.
6 .
E l e c t r i c a l c o n n e c t i o n
The electrical connection, commissioning and adjustment of the appliance may only be carried out by persons with
appropriate electrical qualifications!
Connection to the mains supply must be carried out in compliance with applicable regulations and standards. The
heaters are designed for the TN-C, S network.
The recommended size of the power supply line is in keeping with the basic method of the layout, arrangement and
number of cables (independent and horizontal layout, calm air, ambient temperature 30 ° C). The minimum cross section
of the supply line is specified on the identification plate of the appliance.
The sizing of the supply line must take into account the method of the layout, arrangement and number of
cables!
The power supply line of the appliance must include a switch-off device for disconnecting from the mains supply (the
distance between its disconnecting contacts must be at least 3 mm in all poles). This disconnecting device must be
installed suitably near the appliance.
min.
2x  D
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