BUCHI Nano Spray Dryer B-90 - Manual (Page 86)

7 Maintenance and repairs
86 B-90 Operation Manual, Version B
7.6.2 Outlet filter
A clogged outlet filter results in a pressure drop between inside the Nano Spray Dryer B-90.
Notice
Risk of instrument damage by internal overpressure.
• External supply pressure must meet the system specifications
• Exchange clogged filters immediately
• Safely dispose filter immediately
• If the pressure drops by more than 20 mbar relative to a clean outlet filter, take the filter out and
wash it manually or in a laboratory washing machine.
• Replace the outlet filter annually or if damaged.
7.6.3 Inert Loop B-295 and Dehumidifier B-296
The sealed working circuits of the devices and the optional heat exchanger in combination with the
Inert Loop B-295 can be flooded completely for cleaning purpose.
Notice
Risk of instrument and instrument damage by liquids and detergents.
• Do not spill liquids over the instrument or parts of it
• Wipe off any liquids instantly
• Use ethanol or soapy water as detergent only
• Switch off all relevant devices and unplug the respective power cords.
• Remove the molecular sieve bag for the duration of cleaning if installed.
• Check all sealings and tubes for good condition and proper sealing.
• Raise the exhaust tube and fill the system through the inlet with cleaning medium (e.g. ethanol).
• Provide a collection vessel to collect the cleaning medium flowing from the system. Open the drain
valve and lower the exhaust tube, so that the cleaning medium flows out.
• Rinse out and dry the condensate vessel.
• Reinstall the condensate vessel.
• To dry the working circuit connect the Nano Spray Dryer B-90 and dry it by running the Aspirator
with dry air.