BUCHI Distillation Unit K-355 - Manual (Page 25)

7 Maintenance and repairs
25 K-350 Operation Manual, Version F
7 Maintenance
This chapter gives instructions on all maintenance work to be performed in order to keep the instru-
ment in good working condition.
WARNING
Electrical hazard:
Prior to all maintenance work on the instrument switch off the power supply and remove all
sources of flammable vapor.
WARNING
All maintenance and repair work requiring the opening or removal of instrument covers may only be
carried out by trained personnel and with the tools provided for this purpose.
WARNING
Potentially hot service door or interior behind the service door during operation (surface temperatures
at times exceed 60 °C). Danger of burns.
Always let the instrument cool down before opening the service door.
ATTENTION
Always wear personal protective equipment such as protective eye goggles, protective clothing and
gloves when maintaining the instrument.
Check the instrument for proper operation after any repair work.
7 .1 Daily maintenance
7 .1 .1 Cleaning the instrument from inside
To ensure proper instrument functioning regular cleaning is vital. Thus the generation of caustic
substances within the instrument and the degradation of glassware is avoided. To clean the inside of
the instrument, distill 100 ml of distilled water for a period of 2 minutes.
7 .1 .2 Cleaning the housing
Check the housing for defects (switches, plugs) and clean it with a damp cloth.
ATTENTION
Never use solvents as cleaning agents as these might damage the instrument.
As the housing is made of polyurethane and covered with an acid-resistant coating, any acid
drops must be wiped away immediately with a damp cloth.
7 .1 .3 Cleaning the glass parts
The glass parts can be taken out and cleaned with commercially available cleaning agents or in an
ultrasonic bath. After the glass parts have been cleaned and fully dried, check each part visually for
cracks, scratches and for any parts or sections that might have splintered off. Take out and replace
any damaged glass parts.
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