BINDER VD 23 - Manual (Page 35)

VDL (E2.1) 04/2014 page 35/107
4.2 Vacuum connection
Always connect the VDL vacuum drying oven to a vacuum pump or to a domestic vacuum system. For
this purpose, the vacuum connection (13) with small flange DN16 must be connected to the back of the
unit at the top with the vacuum pump or domestic vacuum system via a vacuum suction hose. For con-
necting to the unit, BINDER recommends the connection kits VP4 (Art. no. 8012-0621) or VP5 (Art. no.
8012-0622), (chap. 15.1).
With the option “stainless steel tubing” between the vacuum oven and vacuum module, the vacuum con-
nection is already located inside the vacuum module.
Vacuum pumps with a suction capacity of 1-30 m³/h are suitable for the VDL vacuum drying
oven. Permissible end vacuum: 10 -2 mbar / 0.0003 inHg.
For use of vacuum pumps in the European Union, note the following points:
•
Pertaining to units that will be operated in potentially explosive areas, the requirements of ATEX Di-
rective 94/9/EC have to be met as of July 1, 2003.
• If combustible solvent will be introduced into the inner chamber, the vacuum pump must be construct-
ed in a suitable explosion-proof manner. The mixtures extracted from the drying chamber must be car-
ried away making sure that there is no danger by ignition of these atmospheres. Otherwise use flame
arresters.
Follow the safety instructions of the pump manufacturer.
In case of an explosion, the flame may be suctioned into the in-house vacuum system and result in further
explosions.
DANGER
Danger due to flame flash-through with in-house vacuum system.
Danger of death.

We recommend installing a flame arrester (flame flash-through barrier) according to EN
12874 between the vacuum drying oven and the in-house vacuum system.
For installing a flame arrester, please contact the BINDER INDIVIDUAL team.
In the event of an error, sparking in the pump motor or the switching elements, electrostatic discharges,
as well as hot pump parts can ignite solvent vapors. Minimize this risk by using an ATEX (Directive
94/9/EC) compliant vacuum pump suitable for suction from Zone 0 or 1 and, if appropriate, from the zone
of its installation site.