THE NEW PIPER AIRCRAFT, INC.
PA-32-301FT / 301XTC
MAINTENANCE MANUAL
PAGE 19
Jun 1/03
2D7
21-50-00
c Failure to acheive or hold a vacuum of 26 in. Hg. (or below) in either (a) or (b),
above, indicates a leak in the system. Locate leak as described in Leak
Detection, above.
d Repair leak. Repeat steps (1) through (13).
14 With the low side (1) and high side (2) valves OPEN, continue pumping, holding
system below 26 in. Hg. for a minimum of 30 minutes.
Note: All specified pumping times may be included in the 0:30 minutes, provided
no blockage or leaks are noted, and provided the system is not opened by
disconnecting or removing components.
15
When panel display reads CPL (complete), close both the low side valve (1) and the
high side (2) valves.
16
Perform charging procedure immediately, see Charging the System, below.
(4) Charging the System
Note: Always evacuate the system (see above), before charging.
(a) Using a Kent Moore J23500 or similar charging stand (refer to Figures 3 and 4)
1 Open the valve at the base of the charging cylinder and fill the charging cylinder with
sufficient refrigerant to charge the system. If refrigerant stops filling the cylinder, open
the bleed valve at the top of the charging cylinder to relieve head pressure and allow
refrigerant to continue filling the charging cylinder.
2 Close the bleed valve and the valve at the base of the charging cylinder.
3
Turn the charging cylinder sight glass to match the pressure reading on the charging
cylinder pressure gauge. Keep the sight glass in this position during the remainder of
the charging operation.
4
Connect the heating element plug to a 110 volt power outlet.
5
With the low pressure control valve (3) closed, open the refrigerant control valve (11)
and the high pressure control valve (10).
6 Allow the correct amount of refrigerant to enter the high side of the system.
7 Close the high pressure control valve (10) and the refrigerant control valve (11).
8
Disconnect the hoses from the airplane’s system.
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