HDS Middle Range / HDS Premium Range
Unit Function
Service Manual 04.2008
Page 25 / 127
2.6
Service switch
Service switch in „Service“ position
Service switch in „OFF“ position
Service switch in „SET“ position
1
2
Adjusting the water hardness
The scale inhibitor metering (RM 110/111) is
adjusted according to the local water hardness
(ask the local water supply company or determine
using a hardness tester 6.768-004).
Service position
In the „Service“ position the Service switch and
the control panel can be used to edit the unit’s
settings. From the „Service“ position the Ser-
vice switch can be turned a little bit further into
the „SET“ position. From this position the
switched returns to the „Service“ position after it
is released. The „SET“ position merely fulfils an
inching function.
The possible settings are described in Chapter
3.1 and 3.2 „Service Functions“.
1 Position marking
2 Service switch
Note
Do not set below position 3 if using
RM 111.
Water hardness
Setting
°dH
very soft
Position
up to 3.0
soft
Position
3.1 - 7.0
medium
Position
7.1 - 14
hard
Position
14 - 21.0
very hard
Position
> 21.0
OFF
1
2
3
4