8
3.1
In coming water supply quality
Check the water quality and water hardness with your local water supply company before
commencing with the installation.
The Incoming water quality should not exceed the following limits. With water it is necessary to know
about the ingredients and their effects.
total hardness:
≤ 3° dH
pH- value:
7,0 bis 8,5
conductivity:
≤ 90 µS/cm
Cl
-
:
Max. 60 mg/l
SO
4
:
Max. 100 mg/l
SiO
4
:
Max. 10 mg/l
Fe:
Max. 0,05 mg/l
Mn:
Max. 0,05 mg/l
Cu:
Max. 0,05 mg/l
Cl
2
:
Max. 0,10 mg/l
Soft water connection:
If the total water hardness is ≥ 3° dH at least one hydrogen ion exchanger must be connected upstream
from the soft water connection on the machine. For our units approved filter systems are partial
demineralisation filters with integrated particle and activated carbon filtration as well as a bypass.
Among others, Brita offers adequate filter systems.
Sodium ion exchangers (as normally used for dishwashers) are not permitted for our machines. The
glass window can become dull and stainless steel components in the cooking chamber could be
irreparably damaged!
Systems with silicate metering must not be used. They can cause malfunctions and scaling in the
cooking chamber.
Systems that operate with electromagnetic fields do not protect against lime scale in this type of machine.
If the total water hardness is < 3° dH but the water contains impurities such as sand, iron particles or
suspended particles, a 5 - 15 µm fine filter must be installed upstream from the soft water connection
on the machine.
If the water is chlorinated Cl
2
in excess of 0.1 mg/l (corresponding to 0.1 ppm), an activated carbon
filter must be additionally installed upstream from the soft water connection on the machine.
Activated carbon filters may also be an integral part of fine filters.
Hard water connection:
If the water contains impurities such as sand, iron particles or suspended particles, a 5 - 15 µm fine
filter must be installed upstream from the hard water connection of the machine.
If the water is chlorinated Cl
2
in excess of 0.1 mg/l (corresponding to 0.1 ppm), an activated carbon
filter must be additionally installed upstream from the hard water connection on the machine.
Activated carbon filters may also be an integral part of fine filters.
Special requirements:
If the chloride Cl
-
concentration is in excess of 60 mg/l (corresponding to 60 ppm) and/or the
concentration of silicate (SiO4) is ≥ 10 mg/l, there is a greater risk of corrosion. Thus the water for
the entire water supply of the device must be treated with a reversed osmosis system. Make sure
that the reference value of 10 µS/cm is maintained.
Reverse osmosis systems can be an alternative to full and/or partial demineralisation systems.
Reverse osmosis systems remove almost all water-hardening substances and non-hardening
minerals from the water.
If a combination of filters and water treatment system is installed, the following components must be
installed in the specified order: sediment filter, hydrogen ion exchanger with activated carbon filter,
shut-off valve.
Regular maintenance on every type of water treatment unit is vitally necessary.
Damages to Eloma machines resulting from neglect of maintenance will void warranty claims.