BINDER VD 23 - Manual (Page 81)

VDL (E2.1) 04/2014 page 81/107
Defining the zone of the installation site of the vacuum pump (guideline 1999/92/EC)
If the pump module is defined as Zone 1, the operating chamber of the vacuum pump must be swept with
inert gas. A flow of at least 1 liter per minute (without pressure) is needed. For Zone 2 or without any zone
sweeping with inert gas is not needed. In addition to sweeping with inert gas, in case of condensing me-
dia, you can connect a gas ballast in order to avoid condensation.
Installation of the supplied vacuum pump
•
The vacuum drying oven is mounted onto the vacuum module as described in the mounting instruc-
tions Art. no. 7001-0137.
• The suction line is installed to the vacuum module as described in the mounting instructions Art. no.
7001-0137.
• When the pump is removed from the original packaging, place it in the vacuum module.
• Connect the pre-installed suction line to the vacuum pump inlet at the suction-side small flange con-
nection located at the top of the condensate flask.
• Connect a conduit that is suitable for removing the extracted vapors from the module, onto the pres-
sure-side connection of the vacuum pump (hose olive on the top-back of the emission condenser).
• Guide the end of the conduit into an exhaust air system, which is explosion-proof constructed in con-
sideration of any possible residual solvent contents. The operator must check if an explosive atmos-
phere may be present at the pump exit or at the exhaust waste vapor condenser. For this purpose, use
a calculation of the solvent’s partial pressure at the set-up coolant temperature of the exhaust waste
vapor condenser and compare it to the explosion limits of the pumped solvent. The exhaust solvent
concentration should be minimized by selecting the most appropriate condensation temperature for the
solvent at the refrigeration plant that can be connected to the exhaust waste vapor condenser. The
pumped-out gases at the pump exit or the exhaust waste vapor condenser must be removed in a con-
trolled manner and according to applicable security regulations. If there is any possibility that an explo-
sive mixture could still exist, the exhaust must be removed through antistatic conduits and disposed of
according to the valid regulations of explosion protection.
• The electrical connection is established at the pump’s connector box. This must be carried out accord-
ing to the original user manual of the pump manufacturer and to EN 60079-14. In addition, the zone
that has been defined by the user for the installation site of the pump must be correctly observed.
Equipotential bonding between the pump housing and the housing of the VDL vacuum drying oven
must be assured by the connected equipment grounding conductors of both units.
Inappropriate execution of the pump connection can lead to the risk of explosion.
DANGER
Inappropriate pump connection.
Risk of ignition and explosion.
Danger of death.

It is obligatory to follow the instructions of the pump manufacturer regarding correct
connection and commissioning.
 Observe the safety advice as in chap. 1.5.
Extracted vapors or the occasionally used inert gas can endanger health. They can also have a corrosive
effect on the oven and pump.