BINDER VD 23 - Manual (Page 37)

VDL (E2.1) 04/2014 page 37/107
4.2.1 Notes regarding use of vacuum pumps of other manufacturers
Connection to a vacuum source
Connect the vacuum connection (13) (small flange DN 16) at the back of the unit at the top to a vacuum
pump or domestic vacuum system via a vacuum conduit or fixed vacuum tubing.
Units that will be operated in potentially explosive areas, have to meet the requirements of
ATEX Directive 94/9/EC since July 1, 2003. Follow the safety instructions in chap. 1.5.
CAUTION
Excessive low pressure.
Risk of technical defects.
∅
The end vacuum must NOT fall below the permissible level of 10 -2 mbar / 0.0003 inHg.
 Install a pump according to the permissible end vacuum or limit it via a vacuum control-
ler.
Extracted vapors can have a health damaging and/or corrosive effect on the unit and pump.
CAUTION
Release of extracted vapors.
Damage to health.
Corrosion of oven and pump.
 Conduct the extracted vapors e.g., into a fume extractor facility. Connect a suitable
hose to the vacuum pump outlet (that may be located in the vacuum module).
4.3 Inert gas connection
When operating the VDL vacuum drying oven with inert gas, correctly follow the technical ventilation
measures, as described in the guideline BGI/GUV-I 850-0 on safe working in laboratories (formerly
BGR/GUV-R 120 or ZH 1/119 laboratory guidelines issued by the employers’ liability insurance associa-
tion) (for Germany).
During operation with inert gas, the unit is supplied with an oxygen displacing gas (e.g. N
2
). Inert gases in
high concentrations are hazardous to health. They are colorless and almost odorless and therefore practi-
cally imperceptible. Inhalation of inert gases can cause drowsiness up to respiratory arrest. When the O
2
content of the air decreases below 18%, there is risk of death from lack of oxygen. Any gas that might
escape has to be led out via good room ventilation or a suitable exhaust system.
WARNING
High concentration of inert gas.
Risk of death by suffocation.
∅
Do NOT set up units in non-ventilated recesses.
 Ensure technical ventilation measures.
 Respect the relevant regulations for handling these gases.
 When decommissioning the vacuum drying oven, shut off the inert gas supply: Close
valve (6).