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Page Title: Figure 5-4. Nitrogen Purging Connection
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TM5-4120-387-14 Assuming that   the  system  has  been paragraph 5-6, proceed as follows: discharged using a manifold as described in a. See specific component removal/repair instructions. b. Be sure that refrigerant has been discharged. (See paragraph 5-6.) c. Connect the center hose from the charging manifold to a nitrogen regulator and dry nitrogen tank. Figure  5-4.  Nitrogen  Purging  Connection d. The hose from the high pressure service valve to the charging manifold must be  connected. e. The hose from the low pressure service valve must be disconnected from the charging manifold. f. Open both service valves on the unit. g. Close the unused valve on the charging manifold, and open the one with the nitrogen tank hook up. h. Open the nitrogen cylinder valve and adjust the regulator so that less than 1 - 2 cfm (0.028-0.057 m3/minute) of nitrogen flows through the system. i. Check discharge from hose attached to the low pressure charging valve to be sure that no oil is being forced out of the system. 5-10

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