Water hardness is measured in equivalent
scales, Clarke degrees, French degrees (°TH)
and mmol/l (millimol per litre - international unit
for the hardness of water).
The softener should be adjusted according to
the hardness of the water in your area. Your
local Water Authority can advise you on the
hardness of the water in your area.
Water hardness Adjusting the water hardness
setting
Use of salt
Clarke °TH mmol/l manually electronically
64 - 88 91 - 125 9,0- 12,5 2 level 10 yes
53 - 63 76 - 90 7,6 - 8,9 2 level 9 yes
46 - 52 65 - 75 6,5 - 7,5 2 level 8 yes
36 - 45 51 - 64 5,1 - 6,4 2 level 7 yes
28 - 35 40 - 50 4,0 - 5,0 2 level 6 yes
23 - 27 33 - 39 3,3 - 3,9 2 level 5 yes
18 - 22 26 - 32 2,6 - 3,2 1 level 4 yes
13 - 17 19 - 25 1,9 - 2,5 1 level 3 yes
5 - 12 7 - 18 0,7 - 1,8 1 level 2 yes
< 5 < 7 < 0,7 1 level 1 no
The water softener must be set in both ways:
manually, using the water hardness dial and
electronically.
Setting the water softener manually (see table)
Set switch to position 1 or
2
The water softener is factory set at position 2.
8
