BUCHI Inert Loop B-295 - Manual (Page 28)

5 Putting into operation
28 B-290 Operation Manual, Version I
NOTE
To cut the power in case of an emergency by unplugging, the instruments or any other items
must not block the mains plug! External connections and extension lines must be provided with a
grounded conductor lead (3-pole couplings, cord or plug equipment). All used power cords must
meet the input power requirements.
Demands on the mains circuit
The mains circuit must
• provide the voltage that is given on the type plate of the instrument.
• be able to handle the load of the connected instrument(s).
• be equipped with adequat fusage and electrical safety measures, in particular proper grounding.
NOTE
Additional electrical safety measures such as residual current breakers may be necessary to meet
local laws and regulation!
External power switches (e.g. emergency stop switches) must meet IEC 60947-1 and IEC 60947-3
requirements. Such devices must be clearly labeled and accessible at any tim.
5 .3 Installing the compressed air maintenance unit and compressor (optional)
To ensure the Mini Spray Dryer B-290 achieves an optimal atomization performance, the supply of
compressed air with a pressure of 5–8 bar is necessary. The compressed air must be dried and free of
impurities (contamination of the product through impure air). If this is not guaranteed, we recommend
the use of a WILKERSON maintenance unit.
Notice
Risk of instrument damage by internal overpressure.
• External supply pressure must meet the system specifications
• Exchange clogged or defective filters immediately
• Dispose of clogged or defective filter immediately
1 2 3
a Activated charcoal filter
b Filter
c Water separator
Fig. 5.1: Compressed air maintenance unit
If there is no compressed air plant available, the compressed air can be taken from an oil-free air
compressor with an output of 5– 8 bar as require.