Equipotential Bonding According To The Grounding Concept; Accessibility To The Disconnection From The Power Grid; Technical Ventilation (Extraction) - Binder VDL Series Operating Manual

1.7.1.3

Equipotential bonding according to the grounding concept

The walkable installation and operating surface of the chamber must be conductive. This installation and
operating surface must be connected to the vacuum drying oven according to the grounding concept
(chap. 6.8). Cyclic measurements of the equipotential bonding are required.
Explosion hazard by electric sparking due to missing or improperly implemented
equipotential bonding.
Serious injury or death from burns and / or explosion pressure.
 Connect all equipment elements in the installation and operating area (VDL / pump
module / pump) with the conductive surface and/or with each other. Proceed according
to the grounding concept (Chap. 6.8).
 Measure the equipotential bonding prior to commissioning the equipment.
 Provide cyclic measurements of the equipotential bonding.
1.7.1.4

Accessibility to the disconnection from the power grid

To completely separate the chamber from the power supply, you must disconnect the power plug. Install
the chamber in a way that the power plug is easily accessible and can be easily pulled in case of danger.
The chamber's power plug is unprotected. The electrical connection must therefore be established out-
side a zone.
1.7.1.5

Technical ventilation (extraction)

The operator shall provide active extraction (technical ventilation according to country-specific regulations
(TRBS 2152 Part 2 for Germany) before commissioning the chamber. Extraction must include the entire
installation area of the vacuum drying oven and a vacuum pump. Observe the area classification in the
surroundings of the chamber (chap. 3.5.3). Extraction must be active during the entire chamber operation.
Operation, loading and unloading of the loading material and removal of the filled condensate catchpot of
the pump must always take place under technical ventilation. If the technical ventilation fails, automatical-
ly switch off power to the chamber.
This will prevent spreading of an explosive atmosphere to unprotected areas (see chap. 3.5).
Explosion hazard due to the spread of an explosive atmosphere to unprotected are-
as and ignition due to electric sparking or hot surfaces.
Serious injury or death from burns and / or explosion pressure.
 Provide active suction (technical ventilation according to country-specific regulations
(TRBS 2152 Part 2 for Germany) prior to commissioning the chamber.
 Extraction must include the entire installation area of the vacuum drying oven; in addi-
tion.
 Make sure that the chamber is automatically turned off if the technical ventilation fails.
VDL (E3.1) 06/2020
DANGER
DANGER
Page 16/206