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 93 of 240
TB 9-2320-302-13&P-3
A/C SYSTEM MAINTENANCE - CONTINUED
0015 00
0015 00-3
RECOVERY - CONTINUED
7.
Follow recovery station OEM instructions and recover R-134a refrigerant.
EVACUATION
CAUTION
•
Moisture will combine with metals in the refrigerant system and this will produce highly corrosive by-
products. The by-products are oxides, iron hydroxide, and aluminum hydroxide and they will damage
the A/C system.
•
Moisture in the A/C system can freeze and damage the expansion valve and orifice tube. If there is
water in the system, the water must be removed by evacuation.
•
Failure to follow those cautions could cause equipment damage.
NOTE
•
If replacement or repair of a component is necessary, refrigerant must be recovered from A/C system.
•
If A/C system has lost any charge after a long period of time, refrigerant in A/C system must be recov-
ered.
•
It is necessary to perform evacuating procedure to remove all air and moisture from the A/C system.
•
A complete charge must never be given to a system without first performing the evacuating procedure.
•
If the system has been left open for more than a half hour, the system has been exposed to air and mois-
ture. A new receiver/dryer must be installed.
•
Evacuating the A/C system with a vacuum pump will boil and remove any water in the system. Remove
water from the A/C system by evacuating the system with a vacuum pump.
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