icetro ISI-271SHS, User Manual

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Removal and Replacement of Capillary Tube
C. Removal and Replacement of Capillary Tube
1. Always install a new drier every time the sealed refrigeration system is opened.
2. Do not replace the dried until after all other repair or replacement has been made.
Install the new drier with the arrow on the drier in the direction of the refrigerant flow
3. When brazing, protect the drier and 4-way valve by using a wet cloth to provent the
drier and 4-way valve from overheating, Do not allow the drier to exceed 250
℉
(121
℃
)
1) Turn off the power of ELCB.
2) Open the side door.
3) Recover the refrigerant using an adequate vessel.
4) Remove the capillary tube and install a new one.
5) Replace the drier with a new one.
6) While purging with nitrogen gas at pressure of 3~4 psig, braze the copper connections.
7) Inject nitrogen at pressure of 140 psig and check for leaks with electric leak detector or
soap water.
8) Vacuum the system and inject the refrigerant.
9) Close the side door.
10) Turn on the power of ELCB.
CAUTION