Piper Aircraft Corporation Malibu Mirage PA-46-350P, Airplane Maintenance Manual

Page: 340 / 1956

PAGE 22
Feb 28/07
2E14
21-50-00
PIPER AIRCRAFT, INC.
PA-46-350P, MALIBU MIRAGE
MAINTENANCE MANUAL
6 To begin charging process, press CHG key on keypad.
a The digital display will read AUTOMATIC and show the amount of refrigerant
programmed for the charge.
b As the solenoid opens, it will make an audible sound.
c The display will count down to zero, and display message CPL, when charging
is complete.
7 Close low side (blue) valve. Check that the high (red) valve is also closed. Also close
coupler valves.
8 Perform Post Charging Operational Check, below.
(5) Post Charging Operational Check
NOTE: The following assumes the charging stand is already connected to the airplane as
described in Evacuating the System, above.
This procedure can also be used to top off a partially charged system with refrigerant.
(a) Using a Kent Moore J23500 or similar charging stand (See Figures 4 and 5 - numbers in
parentheses refer to Figure 4.)
1 Ensure that the low pressure control valve (3) and the high pressure control valve
(10) are closed.
CAUTION: ASCERTAIN THAT THE AREA AROUND THE AIRPLANE IS CLEAR
AND THAT A QUALIFIED PERSON IS AT THE CONTROLS OF THE
AIRPLANE. ENSURE AIRPLANE IS HEADED INTO WIND.
2 Activate the system and operate the engine at 1,000 rpm for 2 minutes. Then operate
the engine at 2,000 rpm for 2 minutes.
3 Check the sight gauge on the receiver-dehydrator during the engine operation at
1,000 and 2,000 rpm. Any indication of bubbles passing the sight gauge indicates
that additional refrigerant is required.
4 If additional refrigerant is required, add it slowly through the refrigerant control valve
(11) and the low pressure control valve (3) until the sight glass remains free of
bubbles. Regulate the flow of refrigerant with the low pressure control valve. Do not
allow the compound gauge (2) to exceed a reading of 40 psi.
5 With the engine operating of 1,000-1,500 rpm, the low and high side gauges should
indicate as shown in Chart 5.
6 With the charge properly established, stop the engine.
7 Close the low pressure control valve (3) and the refrigerant control valve (11).
8 Remove the charging stand. Replace all protective caps, covers, and access panels.
Ambient
Gauge Temperature Indication
Low Pressure All 10 to 35 psig
High Pressure Up thru 75°F 125 psig min to 175 psig max
High Pressure Over 75°F 150 psig min to 275 psig max
CHART 5
AMBIENT TEMPERATURE INDICATION