20
English 5.906-548.0 Rev. 00 (04/12)
1 Service switch
2 Arrow
3 "OFF" position
4 Service position
5 SET position
The water hardness must be set at the site to be able
to correctly meter the system care (RM 110/RM 111).
Determining the hardness of tap water:
–
Through the public water supply works.
–
Measure the water using the water hardness test-
ing set, order no. 6.768-004.0.
Set the service switch according to the water hard-
ness in the table.
All device settings can be modified using the service
setting. This function is described in the chapter
"Service functions".
5.4
Service switch
5.4.1 Setting up water hardness
Degree of
hardness
Water hard-
ness [°dH]
Service switch
setting
very soft
<3
OFF
soft
3,1...7,0
1
medium
7,1...14
2
hard
14,1...21,0
3
very hard
>21,0
4
5.4.2 Service position