TM 5-2410-241-23-3
0263
EVACUATION
000263
C AU T I O N
Moisture will combine with metals in refigerant system and this will produce highly
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corrosive by-products. By-products are oxides, iron hydroxide, and aluminum hydroxide
and they will damage A/C system.
Moisture in A/C system can freeze and damage expansion valve and orifice tube. If there
is water in A/C system, it must be removed.
Failure to follow these cautions ma result in damage to equipment.
y
N OT E
If replacement or repair of component is nec ssary, refrigerant must be recovered from
e
A/C system.
If A/C system has lost any charge after long peiod of time, refrigerant in A/C system must
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be recovered.
It is necessary to perform evacuating procedures to remove all air and moisture from A/C
system.
A complete charge must never be given toA/C system without first performing evacuating
procedures.
If A/C system has been left open for more than 30 minutes, A/C system has been exposed
to air and moisture. New receiver/dryer must be installed.
Evacuating A/C system with vacuum pump willboil and remove any water in A/C system.
Remove water from A/C system by evacuating A/C system with vacuum pump.
1. Install blue low-side hose (Figure 2, Item 4) on suction (low) side (Figure 2, Item 3) of A/C compressor
(Figure 2, Item 5).
2. Install red high-side hose (Figure 2, Item 1) on discharge (high) side (Figure 2, Item 2) of A/C compressor
(Figure 2, Item 5).
3. Follow recovery station OEM instructions to evacuate A/C system.
0263-4
