PUFF PFEN044 Manual De Instalación Y Mantenimiento página 26

7.1 • WATER PRESSURE
The pressure of the water in the network
must be between 150 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.
7.2 • WATER CONNECTION TO THE
VAPORIZER
The water supplied to the vaporizer must
be either cold and softened, or hot
(max 50 °C), as described below. The
water connection is R 3/4". The hose for
connection to the water supply must be
provided by the installer. 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 shutoff
valve must be installed on the line between
the oven and the supply.
The connection to the water supply is
located at the right rear of the bottom of
the appliance.
Recommended water
composition limits:
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
7 • WATER AND DRAIN CONNECTIONS
90041240rev00
7.3 • 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:
PH:
Chlorides
These values are important in ensuring that
the water used by the appliance is suitably
treated!
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.
T h e u s e o f s o d i u m i o n e x c h a n g e r s
(commonly known also as salt softener) is
not recommended.
Water hardness parameters
conversion table
1 °fH
(°tH)
1 °dH
1 °eH
(Clark°)
1 ppm
(mg/lt)
1 gr/gal
(US)
EN - 26 -
between 6° and 9° fH
greater then 7.5
less than 30 ppm
°fH °dH °eH ppm
(°tH) (Clark°) (mg/lt)
1 0,56 0,7 10
1,79 1 1,25 17,9
1,43 0,8 1 14,28
0,1 0,06 0,07 1
1,71 0,96 1,2 17,15
gr/gal
(US)
0,6
1,07
0,86
0,06
1