TM 5-2420-231-23-3
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CHARGING CONTINUED
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 70F (21C) and above. Changes in
ambient air temperature will affect the system's ability to take a charge and will cause
gauge readings to vary.
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 possibility of refrigerant loss.
Up to 7 oz (200 g) of refrigerant loss per year is considered normal.
1. Connect blue low-side hose (Figure 2, Item 3) on suction (low) side (Figure 2, Item 2) of A/C compressor
(Figure 2, Item 1).
2. Connect red high-side hose (Figure 2, Item 4) on discharge (high) side (Figure 2, Item 5) of A/C compressor
(Figure 2, Item 1).
CAUTION
DO NOT invert R-134a refrigerant tank while charging A/C system. Liquid refrigerant
entering low side of A/C system will permanently damage compressor.
3. Follow recovery station instructions and charge A/C system with R-134a refrigerant. Refrigerant capacity is
3.5 lb (1.6 kg).
4. Once charging is complete, disconnect blue low-side hose (Figure 2, Item 3) from suction (low) side (Figure 2,
Item 2) of A/C compressor (Figure 2, Item 1) and red high-side hose (Figure 2, Item 4) from discharge (high)
side (Figure 2, Item 5) of A/C compressor (Figure 2, Item 1).
5. Perform the A/C system performance procedure.
Figure 2. A/C System Charging.
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