ABB ACX Commissioning Instruction page 63

Analyzer System: Seal Integrity Check,
Seal Integrity Check of
Combustion Gas Path in
an
Analyzer System
with VOC Analyzer
Seal Integrity Check
of Back-Purging Unit
CI/ACX-EN Rev. D
Check seal integrity of the combustion gas line in the analyzer system with a leak
detector (measuring principle: thermal conductivity). Leak rate < 2 × 10
not use leak detection spray!
It is recommended to check regularly the seal integrity of the combustion gas line
outside the analyzer system.
The combustion gas path inside the VOC analyzer is checked for leaks at the factory.
No seal integrity testing is required during normal operation.
Step Action
1 Close the water precipitator outlet (part of the pressure regulator
combination).
2 Connect instrument air with operating pressure = 6 bar to the back-
purging unit inlet.
3 Spray the complete compressed-air path with leak detection spray.
ACX Analyzer System Commissioning Instruction
continued
–4
hPa l/s. Do
63