Sweeping The Area For Electrical Equipment And Controller Housing (Triangular Instrument Box); Sweeping Before Starting Up The Chamber; Sweeping During Chamber Operation; Condition After Establishing The Power Connection - Binder VDL Series Operating Manual

9.4 Sweeping the area for electrical equipment and controller housing (trian-
gular instrument box)
To sweep the area for electrical equipment and controller housing, activate the customer's compressed
air or inert gas supply.
9.4.1

Sweeping before starting up the chamber

Before turning on the VDL it is mandatory to sweep the area for electrical equipment and controller hous-
ing with compressed air or inert gas for at maximum overpressure for at least 10 minutes.
• Open the USB cover on the controller housing
• 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 controller housing.
• Now the pressure regulator can be turned back (turn counterclockwise) until there is an overpressure
of at least 25 Pa (recommendation: 40 Pa).
9.4.2

Sweeping during chamber operation

Sweeping the area for electrical equipment and controller housing must take place with an overpressure
of at least 25 Pa (recommendation: 40 Pa) during the entire operation of the vacuum drying oven. Also
after termination or cancellation of the drying process continued sweeping for at least 10 minutes is rec-
ommended.
Explosion hazard by solvent-containing air penetrating and concentration in the
electrical area of the chamber.
Serious injury or death from burns and / or explosion pressure.
 Before turning on the chamber sweep the area for electrical equipment and controller
housing with compressed air or inert gas at maximum overpressure for at least 10
minutes.
 Make sure that sweeping the area for electrical equipment and controller housing with
an overpressure of at least 25 Pa (recommendation: 40 Pa) takes place during the en-
tire operation.
9.5

Condition after establishing the power connection

Only trained personnel with key-authorization may work on the VDL vacuum drying oven.
Prior to establishing the power connection, the following points must certainly be met:
• Installation of the chamber (chap. 6) performed in compliance with the installation guidelines and am-
bient conditions (chap. 5)
• Vacuum supply connected (chap. 6.5)
• If required: Inert gas connection established (chap. 6.6)
• Equipotential bonding established (Chap. 6.8)
VDL (E3.1) 06/2020
DANGER
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