Rp23 Ner Test; Rp24 Manifold Rr - CAIRE Companion C1000 Technical & Service Manual

XI
Troubleshooting & Repair Procedures
RP23 – NER Test
1) Perform a leak test (RP2) and verify that the results are ac-
ceptable.
2) Perform the PRV test (RP9) and verify that the PRV is func-
tioning properly.
3) Set the flow control valve to 0LPM and fill the unit from a
properly saturated liquid oxygen source.
4) Allow 30 minutes for the unit to stabilize.
5) Record the initial weight of the unit and the time (w 1 ).
6) After an elapsed time of 18 to 24 hours, record the weight
and time (w 2 ).
7) Calculate the NER using the following formula.
(24 hrs.) x (w 1 - w 2 )
NER =
(Time between w 1 and w 2 in hrs.)
8) Verify that the NER is less than 1.5 lb/day (0.7 kg/day).
RP24 – Manifold RR
1) Remove the covers (RP4).
2) Remove the top bezel (RP5).
3) Loosen and remove the four socket head cap screws from
the base of the contents indicator assembly. Remove the as-
sembly.
4) Use a 1/2inch open-end wrench to disconnect the 3/16inch
tube nut where the warming coil connects to the manifold.
5) Use a 9/16inch open-end wrench to disconnect the 1/4inch
tube nut where the vent tube connects to the manifold.
6) Use a 9/16inch open-end wrench to disconnect the 1/4inch
tube nut where the fill tube connects to the manifold.
7) Use a 1/2inch open-end wrench to disconnect the 3/16inch
tube nut where the primary relief valve tube connects to the
manifold.
8) Use a 1/2inch open-end wrench to disconnect the 3/16inch
tube nut where the secondary relief valve tube connects to
the manifold.
9) Use a 3/16inch nut driver to remove the four standoffs from
the manifold (Figure 29). Remove the manifold.
Figure 29: Manifold Removal
NOTE: To prevents contaminants from entering the cryogenic
container, place a clean plastic bag over the neck of the container
and seal tightly.
10) Install the manifold by reversing steps 1-9.
11) Use the specified torque wrench to the standoffs of 10in-lb
(115 N-cm) in an alternating sequence (Figure 30).
Companion Portable Technical Service Manual • PN 20562220 Rev B
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