Rp11 Srv Test; Rp12 Srv Rr; Rp13 Pressure Retention Test - CAIRE Companion C1000 Technical & Service Manual

XI
Troubleshooting & Repair Procedures
RP11 – SRV Test
1) Remove the covers (RP4).
2) Connect the pressurizing setup as shown in Figure 9.
3) Remove the silencer from the PRV.
4) Hold the PRV closed while pressurizing the portable.
5) Slowly pressurize the C1000/T by adjusting the gaseous oxy-
gen source regulator.
6) Verify that the SRV opens (audible hiss) at 1.97-2.17 bar
(28.5-31.5 psi).
7) If the SRV does not open within these specified ranges,
repeat the procedure. If it fails to open the second time, re-
place the SRV (RP12).
8) Slowly reduce the pressure of the gaseous oxygen source
until the audible hissing noise is no longer heard, indicating
that the SRV has closed.
9) Verify that the SRV closes at a pressure greater than 1.86 bar
(27 psi).
10) If the SRV does not close within this specified range the
first time, repeat the test. If it fails to open in an acceptable
range the second time, replace the SRV (RP12).
NOTE: Do not release the PRV poppet unit pressure in the unit
is reduced below 1.52 bar (22 psi) by removing the pressurizing
setup and opening the vent valve. Replace the PRV silencer.
RP12 – SRV RR
1) Remove the covers (RP4)
2) Use a 1/2 inch open-end wrench to loosen the 3/16inch tube
nut connected between the secondary relief valve and the
secondary relief valve adaptor. Simultaneously, hold the re-
lief valve adapter stationary with another 1/2inch open-end
wrench while removing the secondary relief valve.
3) Install the SRV by reversing steps 1-2.
NOTE: Before installing the SRV, wrap the SRV threads with
Teflon tape, starting two threads back from the end.
RP13 – Pressure Retention Test
1) Empty the unit and remove the covers (RP4).
NOTE: Perform RP13 only on warm, empty portable units.
Performing this test on Portable units containing liquid oxygen
will yield inaccurate results.
2) Set the flow control valve to 0 LPM (Off).
3) Use the pressurizing setup show in Figure 9 to pressur-
ize the C1000/T until the PRV vents (approximately 1.52
bar/22psi). This is indicated by an audible hissing noise.
4) Close the vent valve and remove the pressurizing setup.
Connect the test pressure gauge to the oxygen outlet barbed
fitting and set the flow control valve to the highest setting.
Record the pressure gauge reading and the time.
5) Set the flow control valve to 0 and remove the test pressure
gauge from the oxygen outlet.
6) Do not disturb the C1000/T for 8 to 9 hours.
7) At the end of this period, verify that the unit maintains at
least 1.04 bar (15 psi). Should the pressure be less, re-pres-
surize the unit to approximately 1.52 bar (22 psi) and locate
the leak by testing all components, fittings, and tubing with
liquid leak detector (RP2). Make repairs as needed, taking
care not to over tighten connections.
Companion Portable Technical Service Manual • PN 20562220 Rev B
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