282 AO2000 CONTINUOUS GAS ANALYZERS | OI/AO2000-EN REV. B
CAUTION!
The heated sample gas connection is hot (approx. 180 °C)! Allow the sam-
ple gas connection to cool down after switching off the power supply
(approx. 30 minutes).
1 Turn off the sample gas supply to the analyzer module.
Switch off 115/230-V-AC power supply of the gas analyzer and heater as
well as if necessary, the separate 24-V-DC supply of the analyzer module.
2 Unscrew exhaust pipe 2 from the exhaust air outlet 1 (key size 12 mm).
3 Unscrew air jet injector from the exhaust air outlet 1 (key size 14 mm).
4 Clean air jet injector in ultrasonic bath. Use aqueous cleaning agent (e.g.
Extran).
5 Replace O-rings 3, 4 and 5 with new O-rings.
NOTE: When cleaning the air jet injector always replace all three O-rings.
Contaminated or damaged O-rings impair the suction performance of
the air jet injector; this may result in the failure of the Fidas24.
Slightly lubricate all three O-rings with high temperature grease (part
no. 772341) before mounting them.
6 Screw air jet injector 6 into the exhaust outlet. Make sure that the
O-rings are seated correctly.
7 Screw the exhaust pipe 2 onto the 1 exhaust air outlet.
8 Reconnect the sample gas supply to the analyzer module.
9 Switch on the power supply.
10 Check output variables of the internal pressure regulator for the supply
gases and adjust if necessary (see section "Fidas24: Gas analyzer
start-up" (see page 129)).
11 Calibrate the gas analyzer at the end of the warm-up phase.
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