Domestic Water Quality - DeDietrich BPB 150 Installation, User And Service Manual

7 Commissioning
7.3

Domestic water quality

20 BPB 150...501
In regions where the water is very hard (Th > 20 °fH (11 °dH)), we
recommend fitting a softener.
The water hardness must always be between 12 °fH (7 °dH) and 20 °fH
(11 °dH) to be capable of providing effective protection against corrosion.
The softener does not bring about a derogation from our warranty
provided that it is approved and set pursuant to the codes of practice and
the recommendations given in the instructions for the softener and is
regularly inspected and maintained.
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