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VDL (E3.1) 10/2020 Page 59/196
6.4.3 Connection of an extraction system at the pump module
Avoid the solvent accumulation in the pump module as this would cause the pump module to
become an occasionally or continuously / for long periods / frequently potentially explosive
area (Zone 0 or 1). The VDL vacuum drying oven located on top of the module is constructed
in device category 3 in regards to its surroundings.
DANGER
Explosion hazard due to the spread of an explosive atmosphere to unprotected
chamber parts and ignition due to electric sparking or hot surfaces
Serious injury or death from burns and / or explosion pressure.
Provide active extraction (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 and pump
module.
Connect an extraction system to the provided port on the rear of the pump module.
6.5 Vacuum connection
Connect the vacuum drying oven to a vacuum pumpor to a domestic vacuum system. For this purpose, the
vacuum connection (6) with small flange DN16 must be connected to the back of the chamber at the top
with the vacuum pump or domestic vacuum system via a vacuum suction hose or a fixed vacuum pipe.
(6)
Figure 15: Position of the Vacuum connection (6) on the chamber rear (example size 56)
When using a vacuum suction hose BINDER recommends the connection kit for the VP4 pump from
BINDER (chap. 6.5.5). The optional pump module (chap.) provides an appropriate hose port on the rear.
6.5.1 Instructions for using vacuum pumps
Vacuum pumps with a suction capacity of 1-30 m³/h are suitable for the VDL vacuum drying
oven.
For use of vacuum pumps in the European Union, note the following points:
• Units that will be operated in potentially explosive areas have to meet the requirements of ATEX Di-
rective 2014/34/EU. Observe the safety instructions in chap. 1.7.
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