THE NEW PIPER AIRCRAFT, INC.
PA-32-301FT / 301XTC
MAINTENANCE MANUAL
PAGE 20
Jun 1/03
2D8
21-50-00
(b) Using a Robinair 34700 charging station or equivalent (Refer to Figures 2 and 5)
CA
UTION: THE FOLLOWING PROCEDURE APPLIES TO ROBINAIR 34700 OR
SIMILAR CHARGING STATION. SEE OPERATOR'S MANUAL OF
CHARGING STATION BEING USED, FOR DETAILED INSTRUCTIONS FOR
CHARGING SYSTEM.
1
Check that main power switch and/or ground power is OFF.
2 Check that the LBS/KG selector switch on back of unit is in desired measurement
mode. Be sure to turn OFF the main power switch before changing the measurement
mode.
NOTE
: You may enter the amount of refrigerant to be charged when the unit is
turned ON. The unit will store the amount in memory until it is turned off.
3
Remove protective caps from the high and low side service ports on the evaporator.
4 Connect the blue and red hoses to the service ports (ref. Figure 5), on systems
equipped with quick disconnect connections, open coupler valves.
CAUTION: DO NOT PLACE ANY WEIGHT, INCLUDING HANDS AND/OR FEET,
ON REFRIGERANT TANK OR SCALE DURING CHARGING
PROCESS. ANY WEIGHT DISTURBANCE WILL CAUSE AN
INDIRECT TRANSFER OF REFRIGERANT.
CA
UTION: ADD REFRIGERANT THROUGH THE LOW PRESSURE SIDE ONLY.
5
Open the low side (blue) valve on the unit's control panel.
6
If the messages PROGRAM and CHARGE do not display, press the CHG key to
enter the PROGRAM mode.
NO
TE
: The amount of refrigerant required must be determined for each airplane. It
is the amount that will result in bubble-free operation at the system sight
gauge. The PA-32-301FT and PA-32-301XTC require approximately 2.25
LBS.
7
Enter amount of refrigerant required to charge the system by pressing the
appropriate number keys and ENTER on keypad.
NOTE: You may enter the amount of refrigerant to be charged when the unit is
turned ON. The unit will store the amount in memory until it is turned off.
8 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.
9 Close low side (blue) valve. Check that the high (red) valve is also closed. Also close
coupler valves.
10 Perform Post Charging Operational Check, see below.
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