Gas Line Connection; Gas Line Connection; Test Gases; Exhaust Air - Abb Ao2000 Series Installation, Start-Up And Maintenance Manual

Chapter 3

Gas Line Connection

Which gas lines must
be connected?
Test Gas Connection

Exhaust Air

Connection
Purging the Sample
Gas Line
41/24-105 EN Rev. 3

Gas Line Connection

CAUTION!
The gas lines and fittings must be free of any residue (e.g., particles left over
from manufacturing). Contaminants can enter the analyzer and damage it or
lead to false measurement results.
Follow the fitting manufacturer's instructions. Be sure to use a backup wrench
when tightening gas line threaded connections (gas ports).
Gas line
Sample gas (heated sample gas port) or
Sample gas (unheated sample gas port)
Combustion gas
Instrument air

Test gases

Exhaust air
The test gas outlet is connected to the sample gas connection at the factory (see
Figure 16 "Gas diagrams", page 57).
If the test gas is supplied directly at the sampling site, remove the link between
the sample gas outlet and sample gas inlet on the sample gas port (see Figure 5,
page 22) and seal the sample gas connection opening with an M6 screw.
Exhaust air should be routed without pressurization to the atmosphere or to an
exhaust pipe directly or via the shortest possible large-diameter line.
Use PTFE or stainless steel exhaust air line. The medium temperature reaches
200 °C.
The ID of the exhaust line should be increased to ≥ 10 mm within no more than
30 cm from the exhaust outlet.
Do not route exhaust gases via flow reducers or shutoff valves.
Install a shutoff valve in the sample gas line (this is definitely recommended for
pressurized sample gas) and provide a means of purging the sample gas line via
the sampling port with an inert gas, e.g. nitrogen.
AO2000-MultiFID14 Start-Up and Maintenance Manual
See
Page 22
Page 24
Page 25
Page 26
below
below
21