Repairing The Flame Photometric Detector; Replacing The Photomultiplier Assembly; Replacing The Burner Block - ABB PGC5000 Series Service Instructions Manual

PGC5000
PGC5000 Series Service Instructions

7.5 Repairing the flame photometric detector

7.5.1 Replacing the photomultiplier assembly

It is the customer's responsibility to ensure that the area is safe and hazard free, and will remain so the
entire time the analyzer is open. This responsibility includes ensuring adequate ventilation in analyzer
shelter and obtaining proper work permits, etc.
Do not remove the light pipe from the photomultiplier assembly as this will exhaust the purge gas which
is necessary for proper operation.
1. Turn off oven air to the isothermal oven; de-activate all heated zones under the set-up tab and allow all temperature
zones to cool.
2. Remove oven power.
3. Open the door on the left side of the analyzer.
4. Disconnect the cables to the Photomultiplier Assembly and set them aside.
5. Remove the four screws securing the Photomultiplier Assembly to the analyzer, being careful to retain the screws to
reinstall the Photomultiplier Assembly.
6. Carefully pull the Photomultiplier Assembly straight out of the analyzer.
7. Reinstall the Photomultiplier Assembly in reverse order of removing it.

7.5.2 Replacing the burner block

Refer to Figure 7.6 while performing this procedure.
Burner Block
Fig. 7.6. Burner Block
1. Remove power from the analyzer.
2. Turn off oven air to the isothermal oven and allow all temperature zones to cool.
3. Turn off air supply to air cleanup unit.
4. Open the isothermal oven door.
5. Disconnect the thermocouple leads from the Burner Block.
6. Disconnect the heater leads from the Burner Block.
7. Disconnect the temperature sensor leads from the Burner Block, if installed.
8. Disconnect the sample line from the Burner Block.
9. Disconnect the vent line from the Burner Block.
10. Disconnect the hydrogen (H2) and carrier lines from the Burner Block.
11. Remove the bracket screws that fasten the Burner Block to the oven.
12. Slide the Burner Block off the end of the Photomultiplier Assembly and remove the Burner Block from the oven.
13. Install the new Burner Block in reverse order of removing it.
SI/PGC5000-EN, Rev B
7 Subassembly repair
61