Fidas24: Information On The Safe Operation Of The Gas Analyzer - ABB EasyLine Series Instructions For Installation Start-Up And Operation

12 EasyLine EL3000 Series Commissioning Instructions

Fidas24: Information on the safe operation of the gas analyzer

Measures of the manufacturer
Conditions to be complied with by the end user
ATTENTION
The gas analyzer uses hydrogen as a combustion gas!
All the information and instructions contained in this operator's manual
must be complied with without fail to ensure safe operation of the gas
analyzer!
The following measures ensure that the enrichment of combustion gas or
an explosive mixture of combustion gas and ambient air cannot occur
inside the gas analyzer during normal operation:

The seal integrity of the combustion gas feed path is checked for a
leakage rate of < 1 × 10

The combustion gas/air mixture (before and after the ignition point) is
diluted in the detector with compressed air.

The combustion gas feed is not connected to the supply during start-
up until the internal nominal pressures have been set.

The combustion gas feed is switched off if the internal nominal
pressures cannot be set during the ignition phase (e.g. because of
insufficient compressed air or combustion air feed).

The combustion gas feed is switched off after several unsuccessful
ignition attempts.

If the flame goes out during operation the combustion gas feed is
switched off if the following ignition attempts are unsuccessful.
The interior of the gas analyzer is not assigned to an (explosion
protection) zone; no explosive gas mixture can escape from it to the
outside.
The end user must comply with the following prerequisites and conditions
to ensure safe operation of the gas analyzer:

The gas analyzer may be used for the measurement of flammable
gases provided that the flammable portion does not exceed
15 vol.% CH or C1 equivalents.
4

The relevant safety regulations for working with flammable gases
must be complied with.

The gas connection diagram (see page 66) must be complied with
when connecting the combustion gas and combustion air.

The combustion gas feed path in the gas analyzer may not be
opened! The combustion gas feed path can become leaky as a result!
Escaping combustion gas can cause fires and explosions, also
outside the gas analyzer!

If the combustion gas feed path in the gas analyzer has been opened,
however, it must always be checked for seal integrity (see page 118)
with a leak detector after it has been sealed again (leakage rate
–4
< 1 × 10 hPa l/s).
–4
hPa l/s before delivery.