VDL (E3) 09/2019 Page 56/234
The operator must ensure active extraction before starting up the chamber. When loading and unloading
the material, extraction must be provided in the safety zone in front of the device as well as when hand-
ling the condensate catchpot of the pump. This ensures that solvent vapors never reach unprotected
areas
If the technical ventilation fails, the power to the vacuum drying oven must be switched off. It must be
ensured that the device can be switched off by the operator using an explosion-protected device: Pull out
the power plug or operate the customer’s explosion-protected emergency stop switch.
5.2.3 Air supply (breaking the vacuum) during operation with inert gas
When operating the VDL safety vacuum drying oven with inert gas, correctly follow the technical ventilati-
on measures, as described in the DGUV guidelines 213-850 on safe working in laboratories, issued by
the employers’ liability insurance association (for Germany).
5.3 Equipotential bonding
The accessible installation and operating surface of the chamber must be electrically conductive. The
accessible installation and operating surface of the chamber must be electrically conductive. This installa-
tion 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. 6.6.
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 protec-
ted.
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 tempe-
rature of +22 °C +/- 3 °C / 71.6 °F +/-5.4 °F to which the specified technical data relate. Devia-
tions 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 / inert gas supply for sweeping the area for electrical
equipment
Before commissioning the chamber, connect the vacuum drying oven to the compressed air supply.
5.6 Fire extinguisher
During operation a fire extinguisher must be available.
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