Endress+Hauser SS1000, Hardware Installation And Maintenance Manual

Page: 104 / 121

2-Pack Analyzer System
B
–
20 4900002256 rev. B 4-13-21
If loading of a filter is observed, the filter should be cleaned and the filter
element replaced. Refer to “To check the filter” on page B-21. After
observation for some time, a regular schedule can be determined for
replacement of filter elements.
No other regularly scheduled maintenance should be required for the system.
Preventive and On-Demand SCS Maintenance
Preventive and on-demand maintenance will be required when components
and parts deteriorate or fail as a result of continuous use. The performance of
the entire SCS and individual components should be monitored regularly so
that maintenance may be performed on a scheduled basis in order to prevent
a failure that could take the system out of operation.
The SCS is designed for convenient removal and replacement of component
parts. Complete spare components should always be available. In general, if a
problem or failure occurs, the complete part should be removed and replaced
to limit system down time. Some components may be repaired (replacement
of seats and seals, etc.) and then reused.
Under a process upset condition, it is possible for liquid to enter the sample
probe and sample transport tubing. Normally, this liquid should purge from the
sample transport line and be trapped in a coalescing filter upstream of the
analyzer.
If the sample supply line does not appear to completely clear during normal
operation, it may be necessary to clean the sample transport line to remove
any liquid that may adhere to the wall of the tubing. The sample transport line
must be disconnected at both ends to allow cleaning. After cleaning, the line
should be purged dry with air or nitrogen before the system is placed back in
operation.
If liquid makes it into the analyzer SCS, a filter element may become
obstructed leading to a decreasing supply pressure or bypass flow. If
obstruction of a filter is observed, the filter should be cleaned and the filter
element replaced. Follow the procedure on the next page.
Due to the chemical properties of the process samples, care must
be taken to repair or replace components with proper materials of
construction. Maintenance personnel should have a thorough
knowledge and understanding of the chemical characteristics of
the process before performing maintenance on the SCS.
The system must be taken out of service during any cleaning of
the sample transport line.