![ABB GAA330-M Operating Instructions Manual Download Page 46](http://html.mh-extra.com/html/abb/gaa330-m/gaa330-m_operating-instructions-manual_4424046.webp)
46
GAA330-M
EMISSION MONITORING SYSTEM | OI/GAA330-M-EN REV. C
Components for automatic back-purging procedure
Components for automatic back-purging procedure
To carry out the automatic back-purging of the filter unit, components are
integrated in the analyzer system as follows:
•
the PFE2 filter unit with valves combination for back-purging or
•
the PFE3 filter unit and separate back-purging unit with integrated
compressed-air conditioning components and
•
the AC500 control program.
Control of the automatic back-purging procedure
The back-purging procedure is integrated into the AC500 control program
of the analyzer system. The manual handling is carried out with the push-
button "Back-Flush" on the analyzer system’s front plate.
Start of the back-purging procedure
Start of the back-purging procedure
The start of the back-purging procedure can be carried out
•
Controlled by time
•
Controlled by event
•
Manually controlled.
Start controlled by time
After a cycle time has run down, the back-purging procedure will start auto-
matically. A cycle time of 8 hours is factory-set.
Start controlled by event
A flow fault during normal measuring operation will start the automatic
back-purging procedure. After back-purging was started by event, the pro-
cedure will run only once. If the procedure is finished (waiting time 30 s) and
the starting event (flow fault) is still active, the back-purging procedure will
not start again, even not controlled by time, and a status message will be
generated. However, the back-purging procedure can be started manually
after 30 minutes.
Manually controlled start
The manual start of back-purging procedure can be executed locally by
pushing the "Back-Flush" pushbutton on the analyzer system’s front plate.