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2.2 CONNECTING TO THE FLUE
(GAS POWERED OVENS)
The gas appliances are provided with a flue for eliminating the residuals of combustion.
This flue must be connected as illustrated in Figures 2.2A – 2.2B as established by the installation rules.
2.2A Natural fumes evacuation type B23: (Fig. 2.2A)
Connection is made to an effective natural draught flue by means of a wind proof fitting, not part of the oven's
standard fittings, with discharge of the combustion fumes directly into the atmosphere.
2.2B Forced fumes evacuation type a3: (Fig. 2.2B)
The supply of gas to the appliance must be interlocked directly to the forced evacuation system and must shut-
down whenever the latter's rate of flow drops below the values prescribed by the current installation standards.
It should only be possible to restore the supply of gas by hand.
If the appliance is installed under an extractor, the end part of the appliance's exhaust gas pipe should be at
least 1.8 m from the surface on which it stands.
The exhaust pipe's outlet section should be positioned inside the base perimeter of the extractor.
3 x d
d
Fig. 2.2A
Fig. 2.2B
2.3 WATER FEATURES
The water must be suitable to human use with the following characteristics:
Temperature: included between 15 – 20°C
Total hardness: included between 4 and 12 °f (French degrees), it is advisable to install a softener upstream
from the appliance that will maintain the hardness level at the mentioned values.
Pressure: included between 150 and 250 KPa (1,5 – 2,5 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 (Cl2): less than 0.2 mg/litre.
pH: more than 7.
Water conductivity: included between 50 and 2000 µS/cm.
Attention: Water treatment systems that bring to different values to the ones above mentioned au-
tomatically 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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