Rp15 Pressure Retention Test; Rp16 Plumbing Leak Test - CAIRE Liberator G4 Series Technical & Service Manual

XII
Repair Procedures
WARNING: Liberator must be empty and vented before starting
procedure.
RP15 – Pressure Retention Test (Figure 18)
a. Assemble pressure gauge (Item A) and adapter assembly (Item
B) (use PTFE tape).
b. Connect gauge assembly to humidifier adapter (Item 26) on FCV
outlet. Open FCV (Item 24) to 6 LPM setting.
c. Assemble oxygen regulator, pneumatic hose (Item C) with DISS
fittings and male pneumatic test adapter (Item D). Connect as-
sembly to oxygen gas source.
d. Connect male pneumatic test adapter (Item D) to Liberator
QDV (Item 15).
e. Increase pressure to 1,4 bar (20 psig).
f. Disconnect male pneumatic test adapter (Item D) from QDV
(Item 15).
g. Turn FCV valve (Item 24) to Off setting.
h. Allow unit to sit undisturbed for 60 minutes.
i. Turn FCV valve (Item 24) to 6 LPM setting.
j. If pressure gauge (Item A) indicates less than 1,24 bar (18 psig),
unit fails test.
NOTE: Liberator should be empty and warm before testing.
RP16 – Plumbing Leak Test (Figure 18)
a. Remove shroud (See RP2).
b. Assemble pressure gauge (Item A) and adapter assembly (Item
B) (use PTFE tape).
c. Connect gauge assembly to humidifier adapter (Item 26) on FCV
outlet. Open FCV (Item 24) to 6 LPM setting.
d. Assemble oxygen regulator, pneumatic hose (Item C) with DISS
fittings and male pneumatic test adapter (Item D). Connect as-
sembly to oxygen gas source.
e. Connect male pneumatic test adapter (Item D) to Liberator
QDV (Item 15).
f. Increase pressure to 1,3 bar (19 psig).
NOTE: PRV and SRV may leak slowly. Repair all other leaks first
and retest for pressure retention before changing relief valves.
g. Leak test all connections, joints, and valves with leak test solu-
tion.
h. Close FCV (Item 24) by turning to Off position. Remove pressure
gauge assembly from humidifier adapter (Item 26).
i. Disconnect pneumatic adapter (Item D) from QDV
(Item 15).
j. Leak test QDV poppet and FCV outlet.
k. Repair all leaks by following appropriate repair procedures.
WARNING: Leak Detector solution should be completely
cleaned from the QDV assembly using dry nitrogen after
testing.
FIGURE 18: Plumbing Tests Set-up
26
24
62
Liberators Technical Service Manual • PN 13350704 Rev K
A
B
28
D
15
C
31