ABB EasyLine EL3000, Инструкция по эксплуатации, Страница: 7 / 216

EL3000
CONTINUOUS GAS ANALYZERS | OI/EL3000-EN REV. D 7
Fidas24 – Information for safe operation
DANGER
Explosion hazard
Explosion hazard due to leaking combustion gas (hydrogen).
• All the information and instructions contained in this
Operating Instruction must be complied with without fail
to guarantee safe operation of the gas analyzer!
Measures of the manufacturer
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 tightness of the combustion gas feed path is
checked for a leakage rate of < 1 × 10
–4
hPa⋅l/s before
delivery.
• 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 commissioning 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 cannot be allocated to an
(explosion protection-) zone; an explosive gas mixture cannot
escape to the outside.
Conditions to be complied with by the end user
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 up-scale 15 Vol.-% CH
4
oder C1 equivalents.
• The relevant safety regulations for working with
combustion gases must be complied with.
• The gas connection diagram (see
Gas connections and
electrical connections Fidas24 (model EL3020)
on
page 83 and
Gas connections and electrical connections
Fidas24 (model EL3040)
on page 84) must be complied
with when connecting the combustion gas and
combustion air.
• The combustion gas path in the gas analyzer must not be
opened! The combustion gas path can become leaky as a
result! Escaping combustion gas can cause fires and
explosions, also outside the gas analyzer!
• If the combustion gas path in the gas analyzer has been
opened nonetheless, it must be checked for leakage
(refer to
Check the integrity of combustion gas path
on
page 192), using a leak detector (leak rate < 1 × 10
–4
hPa
l/s), once it has been closed again.
• The tightness of the combustion gas supply line (see
Check the tightness of the combustion gas line
on
page 192) outside the gas analyzer as well as the
combustion gas path (see
Combustion gas path in the
gas analyzer
on page 193) in the gas analyzer must be
checked regularly.
• The maximum pressures of combustion gas and
combustion air (see
Operational gases
on page 33) may
not be up-scaled.
• The maximum combustion gas flow (see
Combustion gas
on page 34) may not be up-scaled.