Chapter 4 – Maintenance
14
Replacing the mixed-bed resin cartridge
If the mixed-bed resin quality is exhausted (poor permeate quality), replace the mixed-bed resin cartridge.
Check the permeate conductivity after every replacement of the mixed-bed resin cartridge.
1.
Switch off the steam sterilizer and close the
pressure tank shut-off valve.
2.
Unscrew the filter housing (a) from the filter
body (b) using the filter key. Guide the filter key
upwards from below over the filter housing and
turn the filter key in a clockwise direction.
WARNING
The filter housing is full to the brim with water.
Remove the water.
3.
Remove and replace the mixed-bed resin
cartridge (1).
4.
When inserting a new cartridge, please ensure that the flat seal of the mixed-bed resin cartridge
(1) points upwards (see arrow).
5.
Remove the sealing ring from the filter housing (a).
6.
Clean and grease the sealing ring lightly with silicone grease (art. no. 24371).
7.
Replace the mixed-bed resin cartridge (1) in the filter housing.
8.
Screw on the filter housing lightly using the filter key.
Remove the permeate line on the pressure tank (Fig. 1, pos. 10).
9.
Switch on the steam sterilizer.
10.
Collect the outflowing water of the filter housing for 5 minutes in a cup.
11.
Switch off the steam sterilizer.
12.
Determine the conductivity of the water
(˂ 5 µS/cm).
13.
Connect the permeate line to the pressure tank.
14.
Switch on the steam sterilizer and open the pressure tank shut-off valve.
15.
Check whether all the parts are secure and that the reverse osmosis unit is free from leaks.
1
b
a
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