WMF 1100S User Manual page 21

place the water tank water filter (optional)
This item is a step that is performed during the
start-up program.
For drinking water with carbonate hardness from
5 °dKH or higher, a WMF water filter must be fitted;
otherwise, the coffee machine can be damaged due to
build-up of scale.
Determine the water hardness
™ Request drinking water hardness reading from
water supplier, or determine using WMF carbonate
hardness test (complete with instructions) in the
accessories
The carbonate hardness test is supplied with the
accessories.
Capacity
The included water filter for the water tank (BWT 200 l)
can treat up to 200 litres of water at 10 °dkH.
The actual service life depends on the hardness of
the drinking water supply and can be found in the
following table.
Water Capacity
hardness in litres
< 5
no filter needed
above 5 400
6 335
7 285
8 250
9 220
10 200
11 180
12 165
13 155
14 145
User Manual WMF 1100 S
Start-up | Start-up program
Water Capacity
hardness in litres
15 135
16 125
17 120
18 110
19 105
20 100
21 95
22 90
23 85
24 80
> 25 70
The unit used is the "Deutsche
Karbonathärte" (°dKH)
Filter change
w C are
page 39
note
If the water hardness is between
0 and 5 °dKH, no water filter is
needed.
w S tart-up program
page 20
21