TB-9-2510-251-13

TECHNICAL BULLETIN

OPERATOR AND FIELD MAINTENANCE; INSTALLATION MANUAL (INCLUDING REPAIR PARTS LIST); FOR ADD-ON-ARMOR (AoA) AIR CONDITIONING

AUGUST 2007

TB-9-2510-251-13 - Page 301 of 624

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TB 9-2510-251-13

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Air Conditioning System Servicing (Cont’d)

c. Charge Air Conditioning System (Cont’d)

6)

Close the refrigerant tank dispensing valve.

7)

Close low side (RED) service valve on manifold.

8)

Check that gauges read in normal range.

9)

Disconnect the charging hose from the refrigerant tank dispensing valve.

10)

Run air conditioner unit in maximum cool mode for 15 minutes.

11)

Check sight glass.

If system is short of refrigerant, gas bubbles will appear regularly in the

sight glass.

12)

If system is undercharged, add additional refrigerant following Steps 14 through 17.

13)

Place refrigerant tank upright on a scale.

Close refrigerant tank dispensing valve.

14)

Adjust air conditioner to ON; admit refrigerant to system at approximately 1 ounce per

minute.

Do not exceed 5.2 pounds total weight of refrigerant in system.

15)

Repeat Steps 7 through 11.

16)

Check sight glass.

If sight glass regularly shows bubbles, repeat

Steps 14 through 17,

adding refrigerant in 2-ounce increments until indicator is clear.