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90027911rev04
8 • WATER AND DRAIN CONNECTIONS
A p p l i a n c e s a r e i n t e n d e d t o b e
permanently connected to the water
mains
8.1 • WATER PRESSURE
The pressure of the water in the network
must be between 200 and 500 kPa,
as already stated under the heading
“Technical Data”
. If the supply pressure is
higher than this, a pressure reduction valve
must be installed between the oven and
the main.
8.2 • WATER HOOKUP TO SUPPLY THE
STEAM GENERATOR (IF PRESENT)
AND VAPORIZER
Direct steam ovens:
The vaporizer requires softened cold or
hot (max 50°C) water depending upon the
characteristics.
Ovens with steam generators:
The vaporizer and steam generator do not
require a softener and can use cold or hot
(max 50°C) water.
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.
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.
°fH
(°tH)
°dH
°eH
(Clark°)
ppm
(mg/lt)
gr/gal
(US)
1 °fH
(°tH)
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:
Содержание Naboo Series
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