61
of
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TECHNICIANS manual
ENGLISH
10.4
Water filter maintenance
10.4.1 Determining the water hardness
As part of the filter maintenance, it is advisable to test
the water beforehand.
To identify the carbonate hardness of the water use
the special kit as follows:
1. Put 10 ml of water to be tested (
1
) in the test tube;
2. Add a drop of reagent (
2
) and mix;
3. Proceed in the same way by counting the number
of drops until the solution (
3
) turns from blue to red.
1 DROP = 1°dKH
Example: 9 Drops ----> 9°dKH carbonate hardness
3
1
2
10.4.2 Bypass configuration
Depending on the hardness of the water, adjust the
bypass of the water filter as shown in the table below.
Example:
9°dKH water hardness
Bypass adjustment 2
Water
hard-
ness
(°dKH)
Bypass
Adjust.
Filter capacity (litres)
V
M
L
XL
4
3
6,250
9,500
13,000
17,000
5
3
5,000
7,600
10,400
13,600
6
3
4,165
6,330
8,665
11,330
7
3
3,570
5,425
7,425
9,710
8
2
3,125
4,750
6,500
8,500
9
2
2,775
4,220
5,775
7,555
10
2
2,500
3,800
5,200
6,800
12
1
1,865
2,835
3,885
5,080
14
1
1,600
2,430
3,330
4,355
16
0
1,185
1,800
2,465
3,220
20
0
945
1,440
1,970
2,575
24
0
790
1,200
1,640
2,145
≥ 25
0
≤ 755 ≤ 1,150 ≤ 1,575 ≤ 2,060
The values indicated in the table may vary, depending on the type
of filter cartridge used.
To adjust the bypass, push the (
4
) button and turn.
4
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