25
14. Braze upper end of capillary tube first, using a phoson-type
brazing compound (BCuP3 or BCuP5). This compound has a
wide plastic state which will minimize the chance of liquid
brazing compound wicking into the joint and blocking the end
of the capillary tube. Silver-type solder (BAg28) is not recom-
mended for capillary tube connections.
15. Braze the lower end to the capillary tube to the solenoid valve
in a similar manner.
16. Remove the damp rag; nitrogen purge and the clips holding
the insulation back.
17. Reassemble solenoid valve.
18. Insert new valve cores.
19. Pressurize and leak check.
20. Evacuate system.
21. Charge system.
Capillary Tube Replacement (continued)
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