Compressed Air / Inert Gas Connection For Sweeping The Area For Electrical Equipment And Triangle Instrument Box; Figure 13: Compressed Air Connection On The Pressure Regulator - Binder VDL Series Operating Manual

6.2 Compressed air / inert gas connection for sweeping the area for electrical
equipment and triangle instrument box
The compressed air flows through the area for electrical equipment and the instrument box, which pre-
vents a possible concentration of a solvent-containing atmosphere in the presence of live electrical com-
ponents.
You can alternatively connect inert gas or nitrogen to the com-
pressed air connection. Use only dry gas.
In order to avoid that any oil coming from the compressed-air pi-
ping enters the vacuum drying oven, the compressor of the com-
pressed air system must be equipped with an oil separator, or the
compressed air system must be constructed oil-free.
Connection:
Before commissioning, the pressure regulator on the rear of the
chamber must be connected to a compressed air line (compres-
sed air system) or to an inert gas supply.
Connection: Plug-in coupling for DL quick coupling NW5
There must be an overpressure of at least 1.5 bar / 44.3 inHg in
the supply network.
The maximally permitted pressure is 16 bar.
If solvent-containing air penetrates the electrical area of the chamber, explosions may result.
Explosion hazard by solvent-containing air penetrating the electrical area of the
chamber
Serious injury or death from burns and / or explosion pressure.
∅ Make sure that the air for the compressed air supply is NOT taken from explosive at-
mospheres.
Do NOT start the VDL vacuum drying oven when the chamber is not connected to the com-
pressed air supply, or if the specified overpressure is not reached.
Notes when using inert gas:
When operating the VDL vacuum drying oven with inert gas, correctly follow the technical ventilation
measures, as described in the DGUV guidelines 213-850 on safe working in laboratories, issued by the
employers' liability insurance association (for Germany).
During sweeping the area for electrical equipment with inert gas, the chamber is supplied with an oxygen
displacing gas (e.g. N ). Inert gases in high concentrations are hazardous to health. They are colorless
2
and almost odorless and therefore practically imperceptible. Inhalation of inert gases can cause drowsi-
ness up to respiratory arrest. When the O
from lack of oxygen. Any gas that might escape has to be led out via good room ventilation or a suitable
exhaust system.
VDL (E3) 09/2019
DANGER
content of the air decreases below 18%, there is risk of death
2
Figure 13: Compressed air connec-
tion on the pressure regulator
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