Filling Oxygen Cylinder; Indicated Oxygen Cylinder Pressures For Given Ambient Temperatures - Piper PA-24 Comanche Service Manual

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PIPER COMANCHE SERVICE
MA~l'AL
TABLE
1I~1I1.
I\OICATEO OXYGE\ CYU\OER PRESSl"RES
FOR GIVE'
AMBIE~T
TEMPERATURES
I\OICATED CYU\OER PRESS.
TE~IPERATl'RE OF
PSI
110 19~O
100
19].5
90 1890
SO
IK45
70
\tWO
60 1155
50 1710
40
1665
2-5R. Filling Oxygen Cvllnder, The filler valve for the oxygen system is accessible through a door located
on the left side of the fuselage just aft of the rear window.
a. To fill th, oxygen cylinder. open the access door. remove the cap from the filler valve and attach
the filler ho . . . . e from the oxygen recharge unit to the filler valve. Ascertain that all fittings are free from oil.
grease. dirt. etc.
\OTE
If the airplane's oxygen cylinder pressure is below 50 psi. the system
should be purged as descri bed in Paragraph
2~
71.
b. To obtain the correct filling pressure for the oxygen cylinder at various ambient temperatures a
chart ha .. been included for your convenience. The pressures given are not exact. but sufficiently accurate for
pract ical purposes of \\ orking pressure between 1800 and 2400 psig cylinders. The cylinder should be a
110\\
ed
to cool
to
a . . . . tabilized temperature after filling before checking against the figures given in Table It-III.
c. When using a recharge unit consisting of one supply cylinder. slowly open the valve of the supply
unit and allow the oxygen to transfer.
d. When using a recharge unit consisting of two or more supply cylinders (cascade storage systerm, it
i.. recommended that the following procedure be used:
REVISED: 4/3/78
icu
HA~DLI~G A~D SERVICI~G