90037350rev01
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8 • WATER AND DRAIN CONNECTIONS
8.3 • WATER SPECIFICATIONS
The characteristics of the water must come
within the limits given below, in order to
prevent both corrosion, which is extremely
damaging for the appliance, due to
supplying water that is too softened or too
aggressive, and scaling in the oven and in
the water system in the case of supplying
water that is too hard.
Hardness: between 6° and 9° fH
PH: greater than 7.5
Chlorides: less than 30 ppm
These values are important for ensuring that
the water used by the appliance is suitably
treated!
8.4 • WATER CONNECTION FOR STEAM
CONDENSATION
Cold water must be hooked up for steam
condensation. The water attachment is R
3/4”. The water hose must be provided by
the installer and must be in compliance to
IEC 61770. Do not reuse pre-existing or
used hoses. A water shut-off valve must be
installed upstream of the oven.
It is advisable not to use a treatment system
that causes carbonate hardness less than
6 °fH as water having these characteristics
may be aggressive and corrosive, thus
shortening the service life of the appliance.
UK only:
WRAS approval IRN 160. To be carried
out by the installer: An approved double
check valve or some other no less effective
backflow prevention device shall be fitted
at the point of connection between the
supply and the fitting.
The use of sodium ion exchangers
(commonly known also as salt softener) is
not recommended.
°fH °dH °eH
(Clark°)
ppm
(mg/lt)
gr/gal
(US)
1 °fH 1 0,56 0,7 10 0,6
1 °dH 1,79 1 1,25 17,9 1,07
1 °eH
(Clark°)
1,43 0,8 1 14,28 0,86
1 ppm
(mg/lt)
0,1 0,06 0,07 1 0,06
1 gr/gal
(US)
1,71 0,96 1,2 17,15 1
CL
-
max 30 mg/l
Fe max 0,1 mg/l
Mn max 0,05 mg/l
Cu max 0,05 mg/l
Cl2 max 0,1 mg/l
Water conductivity: 50 - 200 µs
Water hardness parameters
conversion table
Recommended water
composition limits:
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