A
Nesta 120-160 Gas valve
Nesta 200-250 Gas valve
I-33
A-070336_EN • Rev. A
P
roduct
I
nstallatIon
Safety Instructions for the Gas Connection
Gas pressure*
Min - Max (mbar)
G20 (20 mbar)
17 - 25
G25 (25 mbar)
20 - 30
G25.1 (25 mbar)
18 - 33
G25.3 (25 mbar)
20 - 30
* i.a.w. EN 437
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Make sure that the gas type
and pressure of the distribu-
tion network are compatible
with the appliance, as per
the information on the appli-
ance data plate.
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The OFFSET (A) setting of the gas
valve is factory-preset and sealed. In
some countries or local jurisdictions,
it is prohibited to change its setting.
Please refer to applicable local regula-
tions.
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The CO
2
, gas fl ow rate, air fl ow rate
and air/gas supply parameters are fac-
tory-preset and may not be modifi ed
in certain countries or jurisdictions.
Please refer to applicable local regula-
tions.
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The gas orifi ce installed on the appli-
ance must never be modifi ed or re-
placed with a diff erent size orifi ce.
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When connecting the gas circuit,
make sure to comply with all applica-
ble local regulations and standards.
The circuit will be equipped with a
meter and a gas pressure regulator if
required.
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Do not exceed the maximum gas
pressure.
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Vent air from the gas pipe work and
thoroughly check all the pipe work
connections (internal and external)
are tight.
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After gas circuit connection check for
leaks.
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Perform a gas tightness test in ac-
cordance with local standards. Use
a gas detection device or perform a
bubble test to check for gas leaks.
Never use an open fl ame, as it could
result in an explosion.
Check the gas pressure and con-
sumption at appliance start up and
at each maintenance, and perform
the adjustment procedure provid-
ed in this manual.
i