ACF5000 FTIR ANALYZER SYSTEM | OI/ACF5000-EN REV. A 147
FID: Seal integrity and functional checks
CAUTION!
The seal integrity and functional checks described in this section may be
carried out by qualified and specially trained persons only.
If these conditions are not provided or the prescribed materials are not
available, seal integrity and functional checks must be carried out by ABB
service.
Seal integrity check of the combustion gas path
The seal integrity of the combustion gas line within the analyzer system
must be checked regularly during each maintenance work and at least every
12 months using a hydrogen leak detector (leak rate < 2 10
−4
hPa l /s). Do
not use leak detector spray!
Seal integrity check of the combustion gas supply line
The seal integrity of the combustion gas feed line must be regularly checked
in accordance with the two following instructions, depending on whether
the combustion gas is offered from a bottle or a central supply.
Combustion gas from a bottle
1 Switch off the analyzer system power supply. Ensure that the shut-off
valve in the combustion gas supply line is open.
2 Set the combustion gas pressure at approx. 1.4 bar.
3 Mark bottle pressure display on the high-pressure manometer.
4 Close the valve of the combustion gas bottle.
5 Observe the display on the high-pressure manometer – it should not
change measurably in 10 minutes.
A measurable change in the display is an indication of a leak in the
combustion gas path between the combustion gas bottle and the com-
bustion gas inlet valve of the analyzer system. In this case the following
measures are to be taken:
1 Check the pressure reducer and the combustion gas line between
the bottle and analyzer system with a leak detection spray. A leak in
this area must be remedied and another leak test must be per-
formed before the analyzer system is put into operation again.
2 If no leak is found at the pressure reducer and in the combustion gas
line, that means the analyzer system combustion gas inlet valve is
leaking. In this case, the analyzer system may not be put into oper-
ation! The combustion gas inlet valve must be replaced by ABB ser-
vice.
6 After conclusion of the seal integrity test, set the combustion gas pres-
sure to 1.2 bar.
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