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TM 10-4130-239-14
5-8.
REFRIGERATION SYSTEM SERVICE - CHARGING (CONT)
9.
With the water chiller running, open the refrigerant tank valve.
Open charging manifold valve and discharge service valve.
Monitor the scale as the water chiller compressor draws
additional refrigerant gas into the system until the full 3.75
lbs. (1.7 kg) charge is obtained.
Close the refrigerant tank
valve and all manifold valves.
10. Continue running the water chiller for 15 minutes.
11. After 15 minutes, observe the liquid sight indicator (sight
glass) on skid.
a. A green center means the refrigerant moisture content is
acceptable.
b. A yellow center means there is too much moisture in the
system.
It must be discharged, evacuated and recharged.
c. If the sight glass is milky white or bubbly liquid it means
the system has a low charge.
If it cannot be determined why
the system is low, repeat the evacuation process and recharge.
d. A clear, bubble-free liquid sight glass indicates the system
is fully charged.
12. Shut down water chiller (para. 2-8d).
13. Remove refrigerant tank and service manifold.
5-9.
REFRIGERATION SYSTEM OPERATIONAL PRESSURE TEST.
This task covers:
Evacuation
Equipment
Condition
Para
2-8
4-15
5-3
Condition Description
Engine stopped.
Housing removed.
Service manifold gauges
attached.
Tools
Tool Kit, Service
Refrigeration, item
5, Appendix B
5-18
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