ABB ACF5000 Manual page 148

148
Function test of the H
ACF5000 FTIR ANALYZER SYSTEM
Combustion gas supply from a central supply
1 Switch off the analyzer system power supply. Ensure that the shut-off
fitting in the combustion gas supply line is open.
2 Set the combustion gas pressure at approx. 1.4 bar.
3 Mark pressure indication on the manometer of the pressure reducer.
4 Shut off the combustion gas supply.
5 Observe the display on the manometer – it should not change measura-
bly in 10 minutes.
A measurable change in the display is an indication of a leak in the
combustion gas path between the pressure reducer and the combustion
gas inlet valve of the analyzer system. In this case the following
measures are to be taken:
1 Check the combustion gas line between the pressure reducer and
analyzer system with a leak detection spray. A leak in this area must
be remedied and another leak test must be performed before the
analyzer system is put into operation again.
2 If no leak is found in the combustion gas line, that means the ana-
lyzer system combustion gas inlet valve is leaking. In this case, the
analyzer system may not be put into operation! The combustion
gas inlet valve must be replaced by ABB service.
6 After conclusion of the seal integrity test, set the combustion gas pres-
sure to 1.2 bar.
safety valve
2
Part of the option "Hydrogen monitoring of the analyzer cabinet" (see page
18) is a solenoid valve which is mounted on the outside of the right side wall
of the analyzer cabinet and which interrupts the hydrogen supply to the
analyzer system if the power supply fails or at 40 % LEL (H
The function of this H safety valve must be checked with a sensitive hydro-
2
gen leak detector at every maintenance, but at least every 12 months.
Procedure
1 Switch off the power supply to the analyzer system.
2 Switch off the 24 V supply to the H
3 Shut off the hydrogen supply (from a central supply or from a bottle).
4 Disconnect the hydrogen supply line from the inlet of the H
Wait a few minutes until the residual hydrogen has evaporated from the
– now open – line.
5 Use the leak detector (highest sensitivity) to sniff the inlet of the H
safety valve.
 If the leak detector indicates a hydrogen leak, this is an indication
that the H safety valve is not closing reliably. In this case, the ana-
2
lyzer system must not be put back into operation! The H
valve must be replaced by ABB service.
If the leak detector does not indicate a hydrogen leak, the analyzer

system can be put back into operation:
6 Connect the hydrogen supply line to the inlet of the H
7 Open the hydrogen supply.
8 Switch on the 24 V supply to the H
9 Switch on the power supply of the analyzer system and put the FID back
into operation (see page 48).
10 After a few minutes, sniff out the screwed connection of the hydrogen
supply line at the inlet of the H
| OI/ACF5000-EN REV. A
safety valve: The valve closes.
2
safety valve: The valve opens.
2
safety valve with the leak detector again.
2
safety valve).
2
safety valve.
2
2
safety
2
safety valve.
2