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7.6. Replacing a Prewet or Rinse Valve (50-2536)
PURPOSE:
This work instruction will replace a Prewet or Rinse Valve within in a SPE-DEX 4790 Module. The valves
are identical in nature.
TOOLS:
-
¼ inch Nut Driver
-
5/32 inch Hex Wrench
-
Molex Pin Extraction Tool (99-0766)
-
Needle Nose Pliers
PARTS REQUIRED:
50-2536 – Prewet and Rinse Valve (24 V)
99-0766 – Molex Pin Extraction Tool
CAUTIONS:
Prior to beginning, the Controller should be turned off and the Module should have the data/power cable
unplugged. The nitrogen supply should be turned off and the solvent lines purged of solvents to prevent
spills.
PROCEDURE:
1.
Remove the five (5) screws from the rear of the Module using the ¼ inch Nut Driver.
2.
Remove the cover by holding the bottom of each side and pushing the bottom backwards to
disengage the front locking tabs. Lift the cover off.
3.
Locate the valve which needs to be replaced on the manifold.
4.
Disconnect the Molex connector.
5.
Carefully clip the wire ties which secure the valve wiring together.
6.
Follow the wires from the afflicted valve to the Molex connector to determine the wires which will
need to be removed from the connector.
7.
Using the Molex tool, remove the appropriate wires from the connector.
Prewet 2
Prewet 3
Prewet 4
Prewet 1
Prewet 5
Rinse 1
Rinse 2
Rinse 3
Содержание SPE-DEX 4790
Страница 1: ...SPE DEX 4790 Solid Phase Extraction System Service Manual ...
Страница 6: ...5 Notes ...
Страница 35: ...34 18 0588 CE SPE DEX 4790 Key Pad 50 0145 CE Control Circuit Board 50 0027 03 External Nitrogen Regulator ...
Страница 39: ...38 ...
Страница 47: ...46 ...
Страница 59: ...58 8 Schematics 8 1 Nitrogen and Solvent Delivery System ...
Страница 60: ...59 8 2 Waste and Vacuum System ...