Safety Instructions On Vacuum Supply - Binder vdl 23 Operating Manual

1.5.2 Safety instructions on vacuum supply

Within the European Union, units that will be operated in potentially explosive areas have to meet the
requirements of ATEX Directive 2014/34/EU.
If combustible solvent is introduced into the drying chamber, the vacuum pump must be constructed in a
suitable explosion-proof manner.
Observe the safety instructions of the pump manufacturer.
The mixtures extracted from the inner chamber must be carried away making sure that there is no danger
by ignition of these atmospheres. Otherwise, use flame arresters (flame flash-through barrier). For in-
stalling a flame arrester, please contact the BINDER INDIVIDUAL team.
In case of an explosion, the flame can be suctioned into an in-house vacuum system thereby resulting in
further explosions.
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
ISO 16852:2010 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
2014/34/EU compliant vacuum pump suitable for suction from Zone 0 or 1 and, if appropriate, from the
zone of its installation site.
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
concentrations. This should be avoided by sufficient solvent condensation e.g., in an
exhaust waste vapor condenser
 When using ATEX Directive 2014/34/EU non-compliant pumps: Provide a current-
dependent, delayed protective device for the pump (for the triggering time of this pro-
tective device, see the manufacturer's specifications). The protective and monitoring
device must not be able to turn on independently again or be released.
 When using ATEX Directive 2014/34/EU 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.
VDL (E2.1) 05/2016
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