Replacing The Gas Output Line - Emerson Rosemount CT5400 Installation, Operation And Maintenance Manual

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7.22

Replacing the gas output line

Complete the following steps to replace the gas output line.
Observe all safety precautions before starting this procedure.
DANGER!
ELECTRIC SHOCK
The analyzer operates using mains voltage that is dangerous to life. Make sure that the power
ON/OFF switch at the rear of the panel is set to OFF and tagged off before removing the top
cover.
The analyzer must be earthed.
Death or personal injury may result if this is not observed.
To gain access to the electrical, pneumatic, and optical components, it is necessary to
remove the top cover.
Procedure
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Installation, Operations, and Maintenance Manual
Refer to Figure 7-34. Use your fingers to push the analysis cell insulation (F) inwards
until the port for the gas input line is exposed. Fit the gas input line (B) to the
analysis cell and secure and seal the joint with the tube adapter (E). Apply a small
quantity of Loctite 567 liquid PTFE compound to the threads of the tube adapter
before it is fitted. Tighten the tube adapter spanner tight.
Fit the gas input line (B) to the rear panel (D). Secure and seal the joint with the pipe
bulkhead (C). Tighten the pipe bulkhead spanner tight.
Connect the wiring harness (A) to connector block X1 on the DIN rail.
Refit the top cover as described in
Reinstall the analyzer in the rack. This step requires two people to properly lift and
transport it to the rack.
Apply power to restart the analyzer.
Power down the analyzer and allow it to cool.
Remove the analyzer from the rack and place it on a stable workbench. This step
requires two people to properly lift and transport it to the workbench.
Remove and retain the four screws attaching the top cover to the chassis.
Refer to Figure 7-35. Carefully cut the two cable ties (B and C).
Troubleshooting and diagnostics
Section 7.25.
119