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VDL (E3.1) 10/2020 Page 52/196
5.3 Equipotential bonding
The accessible installation and operating surface of the chamber must be electrically conductive. The ac-
cessible installation and operating surface of the chamber must be electrically conductive. This installation
and operating surface must be connected to the vacuum drying oven and other equipment (e.g. Pump
module, vacuum pump) according to the grounding concept. Provide cyclic measurements.
For the grounding concept see chap. 6.8.
When inserting or loading objects into the loading area , note that there may be a potential equalization.
The personal protective equipment (PPE) of the operating personnel must be implemented ESD protected.
5.4 Ambient conditions
• Permissible ambient temperature during operation: +18 °C / 64 °F to +32 °C / 90 °F.
The ambient temperature should not be substantially higher than the indicated ambient tem-
perature of +22 °C +/- 3 °C / 71.6 °F +/-5.4 °F to which the specified technical data relate. De-
viations from the indicated data are possible for other ambient conditions.
• Permissible ambient humidity: 70 % r.h. max., non-condensing.
• Installation height: max. 2000 m / 6562 ft above sea level.
The maximum permissible ambient temperature of the vacuum pumps delivered by BINDER is 40 °C / 104
°F.
5.5 Compressed air supply for sweeping the area for electrical equipment, the
preheating chamber, and the controller housing
Before commissioning the chamber, connect the vacuum drying oven to the compressed air supply (chap.
6.3).
The compressed air supply line provided by the operator must be equipped with active monitoring of the
defined inlet pressure (2 bar), which clearly indicates a drop and increase in the inlet pressure outside the
permissible tolerance of ± 0.2 bar.
5.6 Fire extinguisher
During operation a fire extinguisher must be available.
5.7 Lightning protection device
The building in which the vacuum drying oven is installed must have a lightning protection system. All
internal connections in the operator's building must contain lightning protection in accordance with EN/IEC
62305-3.
Lightning protection measures must be taken in order to prevent melting and spraying effects. The opera-
tor’s zone classification shall be used to plan lightning protection measures. The lightning discharge paths
must be designed so that heat or ignitable / spray sparks cannot become the ignition source for an explosive
atmosphere.
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