ABB ACX Commissioning Instruction page 49

Analyzer System with Integrated VOC Analyzer: Installing the Supply
Gases and Test Gases
Installing the
Instrument Air
Supply
Installing the
Combustion Gas Supply
CI/ACX-EN Rev. D
•
Gas inlet conditions, see page 18
•
Material required, see page 24
•
Observe the "Piping Plan" in the drawings set.
•
Pay special attention to complete cleanliness when connecting the gas lines. Gas
inlets, outlets, fittings, tubes and pipes must be free of dust and grease.
Contaminants can enter the gas 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 bulkhead connections (gas ports).
•
Heat the gas lines if there is a danger of frost.
CAUTION!
The pertinent safety regulations for handling combustible gases must be followed.
•
Connect the instrument air line to the bulkhead connector provided for this purpose
on the right wall of the cabinet.
•
Install a shutoff valve with a p
supply system.
•
Clean the combustion gas line: Pump cleaning agent (alkaline cleaner, solvent,
stainless steel pickling fluid) through the tube. Purge tube thoroughly with distilled
water. Purge tube for several hours at a temperature above 100 °C with synthetic air
or nitrogen (10 to 20 l/h). Close off tube ends.
•
Connect the combustion gas line: Connect two-stage pressure-reducing valve (for
ultra-pure gases) with flow limiter to the combustion gas cylinder. Connect the
combustion gas line to the bulkhead connector provided for this purpose on the
right wall of the cabinet.
Note: For safety reasons, a flow limiter is integrated in this bulkhead connector to
limit the combustion gas flow to 10 l/h.
•
Check combustion gas line seal integrity: Adjust the high-pressure stage of the
pressure-reducing valve of the combustion gas cylinder to p
0.1 bar) and purge the combustion gas line. Check seal integrity of the combustion
gas line with a leak detector (measuring principle: thermal conductivity). Close
combustion gas cylinder.
ACX Analyzer System Commissioning Instruction
= 4.5 to 7 bar pressure gauge in the instrument air
e
= 1200 ± 100 hPa (1.2 ±
e
Continued on next page
49