BINDER VD 23 - Manual (Page 16)

VDL (E2.1) 04/2014 page 16/107
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 VDL vacuum drying oven and the in-house vacuum system.
Sparking in the pump motor or the switching elements, electrostatic discharges, as well as hot pump parts
can ignite solvent vapors in the event of an error. To minimize this risk, use 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.
DANGER
Ignition of emerging solvent vapors due to sparking in the pump motor or the
switching elements, electrostatic discharges, hot pump parts.
Explosion hazard.
Danger of death.

Use only suitable, explosion-proof pumps
 Operate the pump in a stationary position and secure it so it is immobile.
 Install a fixed and conductive suction line to the vacuum connection (13).
 Install a fixed and conductive exhaust pipe in case it may conduct ignitable solvent con-
centrations. This should be avoided by sufficient solvent condensation e.g., in an ex-
haust waste vapor condenser
 When using ATEX (Directive 94/9/EC) non-compliant pumps: Provide a current-
dependent, delayed protective device for the pump (for the triggering time of this protec-
tive device, see the manufacturer’s specifications). The protective and monitoring de-
vice must not be able to turn on independently again or be released.
 When using ATEX (Directive 94/9/EC) non-compliant pumps: Install the switch gear box
outside the hazardous area or provide it with explosion protection.
 Assure equipotential bonding between the pump housing and the housing of the VDL
vacuum drying oven by the connected equipment grounding conductors of both units.
The ATEX (Directive 94/9/EC) compliant pumps offered by BINDER provide an integral protec-
tive device.
The ATEX (Directive 94/9/EC) compliant pumps offered by BINDER provide an integral explo-
sion proof switch.
Confirm that the vacuum source is designed for a gas inlet temperature corresponding to the
used drying temperature, or take appropriate measures to cool down the extracted vapor be-
fore it enters the vacuum source.