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VDL (E3.1) 10/2020 Page 30/196
1.11 Residual Risks
The unavoidable design features of a chamber, as well as its proper field of application, can also pose risks
for the user, even during correct operation. These residual risks include hazards which, despite the inher-
ently safe design, existing technical protective equipment, safety precautions and supplementary protective
measures, cannot be ruled out.
Messages on the chamber and in the Operating Manual warn of residual risks. The consequences of these
residual risks and the measures required to prevent them are listed in the Operating Manual. Moreover, the
operator must take measures to minimize hazards from unavoidable residual risks. This includes, in partic-
ular the Operator measures described in chap. 2. Residual hazards are to be taken into account by the
operator in their risk assessment. This includes, in particular, issuing operating instructions.
The following list summarizes the hazards against which this Operating Manual and the Service Manual
warn, and specifies protective measures at the appropriate spots (list is not exhaustive):
• Flames, explosion
Unpacking, Transport, Installation
• Sliding or tilting the chamber
• Setup of the chamber in unauthorized areas
• Connecting the power plug in unauthorized areas
• Anschluss der Plug connection of the optional analog output in unauthorized areas
• Installation of a damaged chamber
• Installation of a chamber with damaged power cord
• Inappropriate site of installation
• Missing protective conductor connection
• Use of unsuitable pump or vacuum systems
• Improperly connected pump
• Missing or improperly executed equipotential bonding
• Missing or improperly designed technical ventilation in the installation area
• Missing or improperly designed compressed air supply in the installation area, missing monitoring of the
minimum supply pressure of the compressed air supply
Normal operation
• Assembly errors
• Lack of electrical testing before initial commissioning or recommissioning
• Insufficient or missing technical ventilation (extraction) at the installation area of VDL and pump
• Insufficient or missing or not monitored compressed air sweeping of the electrical installation room,
preheating chamber, and controller housing (triangular instrument box) prior to start-up
• Insufficient or missing or not monitored compressed air sweeping of the electrical installation room,
preheating chamber, and controller housing (triangular instrument box) during chamber operation
• Contact with hot surfaces on the housing
• Contact with hot surfaces in the interior and inside of doors
• Emission of non-ionizing radiation from electrical operating resources
• Use of inert gas in higher concentration (optional)
• Use of unsuitable pump and discharge
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