Installing the Gas Analyzer 73
Fidas24: Connecting the Combustion Gas Line
Connecting the Combustion Gas Line
Cleaning the Combustion Gas Line
1 Pump cleaning agent (alkaline cleaner, stainless steel pickling agent)
through the stainless steel tube.
2 Thoroughly rinse the tube with distilled water.
3 Purge the tube for several hours at a temperature of > 100 °C with
synthetic air or with nitrogen (10 to 20 l/h).
4 Seal the ends of the tube.
Connecting the Combustion Gas Line
5 Connect a two-stage cylinder pressure reducer (version for high purity
gases) to the combustion gas cylinder.
6 Connect the combustion gas line to the cylinder pressure reducer.
7 Install a flow restrictor in the combustion gas supply line which
restricts the combustion gas flow to 10 l/h of H
2
or 25 l/h of H
2
/He
mixture. This means that operation of the gas analyzer is safe even
with a defect in the combustion gas feed path (e.g. leaks).
8 Install a shut-off valve in the combustion gas supply line. It is
recommended that a pneumatic valve is installed; this valve must be
controlled by the instrument air supply in such a way that the
combustion gas feed is automatically shut off if the instrument air
supply fails (see page 129) (and the continuous housing purge
therefo
re fails).
9 Connect (see page 66) the combustion gas line to the combustion
gas inl
et of the analyzer module via a pressure regulator
(0 to 1.6 bar).
Check the seal integrity of the combustion gas line
10 Check (see page 116) the seal integrity of the combustion gas line
af
ter connection.
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