TM 5-3805-292-23
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RECOVERY CONTINUED
Figure 1. Recovery Hook-Up.
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END OF TASK
EVACUATION
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C AU T I O N
Moisture will combine with metals in the refrigerant system andthis 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 anddamage the expansion valve and orifice tube.
If there is water in the system, the water must be removed.
Failure to follow these cautions ma result in damage to equipment.
y
N OT E
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 lo g period of time, refrigerant in A/C system
n
must be recovered.
It is necessary to perform evacuating procedures 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 procedures.
If the system has been left open for more than 30 minutes, the system has been exposed
to air and moisture. A new receiver/dryer must be installed.
Evacuating the A/C system with a vacuumpump will boil and remove any water in the
system. Remove water from the A/C system by evacuating the system with a vacuum
pump.
