Lenze 8250 series Brake unit - Manual (Page 20)

Installation
8250BA0903 4-1
4 Installation
4.1 Mechanical installation
4.1.1 Important notes
• Use the brake units only as built-in devices!
• Observe free space!
- Allow a free space of 100 mm at the top and at the
bottom.
• Ensure unimpeded ventilation of cooling air and outlet of
exhaust air.
• If the cooling air contains pollutants (dust, fluff, grease,
aggressive gases ), which may impair the function of the
brake units:
- Take suitable preventive measures , e.g. separate air
duct, installation of filters, regular cleaning, etc.
• Do not exceed the permissible range of the operating
ambient temperature (see chapter 3.2).
• If the brake units are permanently subjected to vibration or
shaking:
- Check whether shock absorbers are necessary.
Danger!
Operation with 8253 brake chopper and external brake resistor:
• In the event of failures, brake resistors can become very
hot, they can even burn. E.g. when the following occurs:
- mains overvoltage,
- application-specific overload,
- internal fault.
• Brake resistors must therefore be installed such that the
very high temperatures possible cannot cause any
damage.
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