12
12
1.3.5 Gas-pressure switch
This section is only applicable, if the heater has been
equipped with a gas-fired burner.
The gas-pressure switch monitors the gas pre-pressure
to the gas block. If the gas pre-pressure drops below a
threshold value, the gas block will close-off the gas
supply to the burner.
The switching point of the gas-pressure switch of Riello
front-mounted burners is:
The values above are recommended settings and have
been determined under laboratory conditions.
The gas-pressure switch’s switching point must be set
during the commissioning of the water heater. Please
make sure that the burner safely extinguishes before the
CO contents of the flue gas reaches 2000 ppm.
This is checked by slowly closing the gas supply and
verifying that the burner controller safely locks before
the CO contents of the flue gas reaches 2000 ppm.
Switching point gas-pressure switch [mbar]
GAS G20
GAS G25
GAS G30
GAS G31
COF 199
6
6
6
6
COF 245
6
6
6
6
COF 315
7
7
7
7
COF 385
7
8
6
6
COF 455
8
8
5
6
COF 700
10
12
7
7
UNIT
Содержание COF 199
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