AfG Berlin COMBI DIRECT RD-305 Serie Instructions D'installation page 25

Combi Direct 5 x 2/3 GN / 5-10-15 x 1/1 GN
INSTRUCTIONS FOR THE INSTALLATION ENGLISH
2.3-HYDRAULIC CONNECTION – WATER INLET (Fig. 2.3A)
The ovens have a water inlet coupling at the back.
Always install an on-off valve between the appliance and the
Fig. 2.3A
water mains, making sure it is easy to operate.
We also suggest installing a cartridge filter on the water inlet
pipe.
Always connect to the cold water, the solenoid valve (B)
which supplies the steam condensation system that comes
out of the drainpipe, while solenoid valves (A) and (A1)
supplies the system that generates steam for cooking
chamber.
The water must be suitable to human use with the following
characteristics:
Temperature:
included between 15 – 20°C
Total hardness:
included between 4 and 8 °French degree, it is advisable to install a softener
upstream from the appliance that will maintain the hardness level at the mentioned values. The
oven's running with water that has a higher hardness level will not be long before scale forms on
the walls of the oven and in this case the technical assistance required to repair such damage is
not covered by the guarantee.
Pressure:
included between 100 and 200 KPa
(1 – 2 bar).
Attention higher water pressure values result in increased water consumption and can compromise
the correct functioning of some components.
Maximum chloride concentration (Cl-):
less than 150 mg/litre.
Chlorine concentration (Cl 2 ):
less than 0.2 mg/litre.
pH:
more than 7.

Water conductivity:
included between 50 and 2000 S/cm.
Attention:
Water treatment systems that bring to different values to the ones above mentioned
automatically invalidate the guarantee.
The use of dosing systems designed to prevent the build-up of lime-scale in pipes (i.e.
polyphosphate dosing systems) is also prohibited since it may impair the performance of the
appliance.
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