Ventilation Before Completing The Drying Procedure (Flooding With Ambient Air Or Inert Gas); Unloading The Loading Material - Binder VDL Series Operating Manual

9.10.4 Ventilation before completing the drying procedure (flooding with ambient air or
inert gas)
If possible, avoid terminating the drying process. If it is nevertheless to be done, it is essential to observe
the following instructions!
Safety during the drying process: The vacuum during drying prevents the presence of an explosive
atmosphere in the interior of the chamber. At the start of the drying process, the heater is therefore only
released at a pressure of 100 mbar. In addition, the maximum temperature is limited so that, with correct
load, there is no risk of ignition from hot surfaces.
Error: If incorrect loading with an inadmissible solvent (auto-ignition temperature <200 ° C) has occurred,
proceed as follows
• Disconnect the power plug and turn off the pump.
• Let the chamber cool down to room temperature.
• Do NOT remove the "Manual ventilation" plug.
• Only ventilate when the interior temperature has cooled to room temperature. Only then open the
door.
Hazard when opening the door after ventilation: After incorrect loading, open the door only when the
inner temperature has sunk to ambient temperature.
Prior to a termination of a not completed drying process make sure that the auto-ignition tem-
peratureof the solvent has been determined correctly, and that the drying temperature
reached far below this. In case of doubt, do not interrupt the drying process!
Proceeding to terminate the drying process:
• Set the temperature set-point to approx. ambient temperature
• the chamber cool down to ambient temperature
• Set the pressure set-point to approx. atmospheric pressure
Explosion hazard through the formation of an explosive atmosphere in the presence
of hot surfaces after incorrect loading
Serious injury or death from burns and / or explosion pressure.
∅ Do NOT use ambient air to break the vacuum as long as the chamber is hot. Do NOT
remove the "Manual ventilation" plug as long as the drying process is still running,.
 Let the chamber cool down to room temperature before opening the door.
9.11

Unloading the loading material

Do not unload the loading material without technical ventilation.
Note the following points before unloading the loading material:
When unloading the loading material also in the context of intended use, an explosive mixture may form
in the working space. Therefore, a safety area of min. 1 m in front of the oven must be considered.
VDL (E3.1) 06/2020
DANGER
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