TB-9-2320-302-13-P-3
CREW PROTECTION KIT; AIR CONDITIONING KIT PART 3 OF 3
TECHNICAL BULLETIN; OPERATOR’S, UNIT, AND DIRECT SUPPORT, MAINTENANCE MANUAL, INSTALLATION INSTRUCTIONS, AND REPAIR PARTS AND SPECIAL TOOLS LIST
MARCH 2008
TB-9-2320-302-13-P-3 - Page 96 of 240
TB 9-2320-302-13&P-3
A/C SYSTEM MAINTENANCE - CONTINUED
0015 00
0015 00-6
CHARGING
CAUTION
DO NOT charge the A/C system with liquid refrigerant through the compressor suction ports. This could
seriously damage the compressor.
NOTE
•
Charging should be performed at air temperatures of 70°F (21°C) and above. Changes in ambient air
temperature will affect the system’s ability to take a charge and will vary gauge readings.
•
When adding a partial charge to the A/C system, if there is no evidence of air in the system and there are
no system leaks, it is not necessary to discharge and evacuate the A/C system.
•
Operating A/C system periodically during the off-season will lubricate the seals and reduce the possibil-
ity of refrigerant loss.
•
Up to 7 oz. (200 g) of refrigerant loss per year is considered normal.
•
Steps 1 through 3 only need to be performed if a partial charge is being done.
1.
Connect manifold gauge set (1) low-side hose (4) to suction (low) side of A/C compressor.
2.
Connect manifold gauge set (1) high-side hose (5) to discharge (high) side of A/C compressor.
437-200
5
4
6
8
1
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