Special Requirements For The Measurement Of Flammable Gases - ABB EasyLine Series Instructions For Installation Start-Up And Operation

38 EasyLine EL3000 Series Commissioning Instructions

Special Requirements for the Measurement of Flammable Gases

Installation of the Gas Analyzer
Commissioning of the Gas Analyzer
Operation and Maintenance of the Gas Analyzer
NOTE
The version for the measurement of flammable gases and vapors and the
explosion-proof version with degree of protection II 3G are different
versions of the gas analyzer and designed for different applications.

Model EL3020 only: An unimpeded exchange of air with the
surroundings must be possible around the gas analyzer from beneath
(base plate) and from behind (gas connections). The gas analyzer
must not be put directly on a table. The case apertures must not be
closed. The distance to adjacent, built-in components on the side
must be at least 3 cm.

Model EL3020 only: For installations in a closed cabinet, the cabinet
must have adequate ventilation (at least 1 air change per hour). The
distance to adjacent, built-in components underneath (floor plate) and
behind (gas connections) must be at least 3 cm.

The connection of the pressure sensor must not be connected to the
sample gas feed path.

The sample gas lines and connections have to be made in stainless
steel.

Prior to using the gas analyzer the corrosion resistance against the
present sample gas must be tested.

The sample gas feed path must be purged (see page 93) with inert
gas, before the gas analyzer is commissioned.

Model EL3040 only: The case must be purged with nitrogen. Purge
gas flow 1 to 20 l/h. The purge gas flow must be monitored at the
purge gas outlet.

The positive pressure in the sample gas feed path may not exceed a
maximum value of 100 hPa in normal operation and a maximum
value of 500 hPa in the event of a fault.

The seal integrity of the sample gas feed path should be checked
regularly (see page 119).

After the sample gas feed path inside the gas analyzer has been
opened (see page 120), the following measures are required:

The seal integrity of the sample gas feed path should be checked.

The sample gas feed path must be purged with inert gas, before
the power supply is switched on.