Notes On Water Treatment; Selection Of The Water Filter - Rational iCombi Pro Original Installation Instructions

8 | Water connection
8.3

Notes on water treatment

If the water quality is not suitable for the device, water treatment is required.
Observe the following notes:
Treated water with a hardness of less than 5 °dH can have an aggressive
n
and corrosive effect and shorten the service life of the device. Do not use
treated water with a hardness of less than 5 °dH.
Observe the country-specific regulations regarding water and wastewater
n
connections, in particular also regarding the installation of water extraction
points.
Check the chloride concentration (Cl
n
water hardness with your local water supplier.
When connecting the iCombi Pro to water with less than 7 °dH: When the
n
self test is started, a query is made as to which water hardness the device
is connected to. In this case, select the point water hardness below 7 °dH.
A water connection without additional filters and water treatment is possi-
n
ble in most cases.
If critical water conditions prevail, filtration and/or water treatment is
n
necessary.
8.4

Selection of the water filter

If critical water conditions prevail, filtration and/or water treatment is neces-
sary. Observe the following notes when making your selection:
(A) Fine filter
If the water is contaminated by sand, iron particles or suspended particles, we
recommend fine filters with 5 – 15 µm [0.0002 – 0.0006 inch] filter fineness.
(B) Activated carbon filter
In the case of strong chlorination (Cl
sponds to 0.2 ppm), an activated carbon filter must be installed upstream. In-
formation about chlorination (Cl
company.
(C) Reverse osmosis system
If the chloride concentration (Cl
sis system must be installed due to the risk of corrosion. Information about the
chloride concentration (Cl
pany.
Malfunction due to falling below the minimum conductivity value
Make sure that the minimum conductivity of the water is 50 μS/cm [32
ppm TDS].
(D) Water softening
iCombi Pro / iCombi Classic
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-
), chlorination (Cl
) of the water above 0.2 mg/l (corre-
2
) can be obtained from the local water supply
2
-
) is above 80 mg/l [80 ppm], a reverse osmo-
-
) can be obtained from the local water supply com-
NOTE
80.06.083_iCombi Pro-iCombi Classic_IM_V01_en-US
), conductivity and
2