Piper Comanche PA-24 Service Manual page 91

'1:.
PIPER COMANCHE SERVICE MANUAL
TABLE II-Ill. INDICATED OXYGEN CYLI]\;DER PRESSURES
FOR GIVEN AMBIENT TEMPERATURES
INDICATED CYLINDER PRESS
TEMPERATURE of
PSI
110 1980
100 1935
90
1890
80 1845
70
IgOO
60 1755
50 1710
40 1665
-
2-58 Filling Oxygen Cylinder. 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 the oxygen cylinder. open the access door. remove the cap from the filler valve and attach
the filler hose from the oxygen recharge unit to the filler valve Ascertain that all fittings are free from oil.
grease. d ir!. etc
NOTE
If the airplane's oxygen cylinder pressure is below 50 psi. the system
should be purged as described in Paragraph 2-71.
b To obtain the correct filling pressure for the oxygen cylinder at various ambient temperatures a
chan has been included for your convenience The pressures given are not exact. but sufficiently accurate for
practical purposes of work ing pressure between 1800 and 2400 psig cylinders The cylinder should be allowed
to cool to a stabilized temperature after filling before checking against the figures given in Table II-III
c. When using a recharge unit consisting of one supply cylindei.'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 system). it
is recommended that the following procedure be used.
REVISED: 4/3/78
lC13
HANDLING AND SERVICING