|
| |
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
|
