Setting The Overpressure For Sweeping With Compressed Air / Inert Gas; Figure 14: Pressure Regulator For Compressed Air Sweeping On The Chamber Rear, Top Right; Figure 15: Analog Pressure Display (Manometer) For Compressed Air Sweeping On The Chamber Front - Binder VDL Series Operating Manual

Risk of suffocation due to high concentration of inert gas.
Death by suffocation.
∅ Do NOT set up chambers in non-ventilated recesses.
 Ensure active technical ventilation measures.
 Respect the relevant regulations for handling inert gas.
 When decommissioning the vacuum drying oven, shut off the inert gas supply: Close
valve (6).
6.2.1

Setting the overpressure for sweeping with compressed air / inert gas

After opening the pressure regulator on the chamber rear (turn clockwise), the area for electrical
equipment of the oven and the controller housingwill be swept. Compressed air or inert gas is used and
then released into the surrounding atmosphere independent of the oven's operating state.
Compressed air sweeping must be in operation for at least 15 minutes before turning on the chamber. It
remains in operation during the entire use of the chamber (loading, drying, removal of the material to be
dried), with an overpressure of at least 25 Pa (recommendation: 40 Pa).
On the chamber front there is an analog pressure display (manometer) to show the existing overpressure.
Figure 14: Pressure regulator for compressed air
sweeping on the chamber rear, top right
Sweeping before starting up the chamber:
• Open the USB cover on the triangle instrument box
• Turn the pressure regulator until the end stop to the lock nuts (turn clockwise).
• Recommended time for sweeping 15min. This flushes 5 times the volume of the electrical installation
area and controller housing
• Close the USB cover on the triangle instrument box.
• Now the pressure regulator can be turned back (turn counterclockwise) until there is an overpressure
of at least 25 Pa (recommendation: 40 Pa).
Sweeping during chamber operation:
• Set the pressure on the pressure regulator in a way that the manometer shows at least 25 Pa over-
pressure. Recommended value: 40 Pa.
• Check the display frequently during chamber operation. In all operating states, the value on the ma-
nometer must indicate > 25 Pa.
• The USB cover on the triangle instrument box must be closed.
VDL (E3) 09/2019
DANGER
Figure 15: analog pressure display (manometer)
for compressed air sweeping on the chamber front
Page 60/234