BUCHI KjelFlex K-360 - Manual (Page 53)

7 Maintenance
53 KjelFlex K-360 Operation Manual, Version C
7 .4 Yearly maintenance
7 .4 .1 Customer service
In order to avoid down times of a KjelFlex, we recommend to have the following parts replaced at least
once a year by an authorized service person:
Membranes of the aspiration module valves •
NaOH pump, the other pumps if required •
Only authorised service personnel are allowed to perform repair work on the instrument. These
persons have a comprehensive technical training and knowledge of possible dangers which might
arise from the instrument.
Addresses of official Buchi customer service offices are given on the Buchi website under:
www.buchi.com. If malfunctions occur on your instrument or you have technical questions or applica-
tion problems, contact one of these offices.
The customer service offers the following:
Spare part delivery •
Repairs •
Technical advice •
7 .4 .2 Decalcification of the steam generator
To decalcify the steam generator proceed as follows:
Make sure that the steam generator is cooled down (switch off the unit and let it cool down for at 1.
least 30 minutes)
Remove the water of the steam generator (see 9.1 Emptying the steam generator)
2.
Mix about 0.8 L of solution for decalcification (use e.g. approx. 160 g citric acid or approx. 80 g 3.
amidosulfonic acid dissolved in 0.8 L water)
Remove the hose from the H
4.
2
O-inlet on the back of the instrument.
Connect a new hose to the H 5.
2
O-inlet and put its free end into decalcification solution
Switch on the K-360 6.
After initialization the pump starts running 7.
Switch off the unit after the steam generator is filled up with the solution (pump stops running) 8.
Let the solution dissolve the lime for 0.5 – 1 hour 9.
Remove the solution of the steam generator (see step 1 and 2) 10.
Perform a second decalcification (see step 6 – 10) 11.
Connect the hose from the water tank with the inlet of H 12.
2
O
Flush the steam generator 2 – 3 times with distilled water (see step 6 – 8 and 10) 13.
Perform 2 – 3 times a CLEANING (cleaning method) of the instrument 14.