FULL CHARGE (cont)

TM 9-4120-428-14

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VAC

VACUUM VALVE

HIGH

PRESSURE

GAUGE VALVE

CLOSED

REF

CHARGE VALVE

CLOSED

RED 1/4 IN.

PRESSURE GAUGE

HOSE (HIGH)

DEHYDRATOR

HIGH

TYPICAL REFRIGERANT

PRESSURE

R-22 TANK IN POSITION

LOW

CHARGING

TO CHARGE GAS

PRESSURE

VALVE

LOW

CHARGING VALVE

CLOSED

COMPOUND

GAUGE VALVE

YELLOW 1/4 IN.

CHARGE HOSE (REF)

BLUE 1/4 IN.

COMPOUND GAUGE

YELLOW 3/8 IN.

HOSE (LOW)

VACUUM HOSE (VAC)

16. Set the refrigerant cylinder to deliver gas only.

17. Ensure the pressure gauge valve is closed.

18. Open the compound gauge valve.

19. Open the charge valve.

20. Monitor the weight of the refrigerant cylinder as the air conditioner compressor pulls additional refrigerant into the

system until full charge is obtained (2.2 pounds (1.0 kg) for F9000H-1SA or 2.4 pounds (1.09 kg) for F9000H-3SA).

21. Run the air conditioner in COOL mode with the temperature set at the maximum COOLER position for 15 minutes.

22. With the unit running, observe the sight glass on the back of the condenser section. Be sure that the refrigeration

system is not in BYPASS mode. When the system goes into BYPASS, bubbles will appear in the sight glass.

A green center indicates the refrigerant moisture content is acceptable.

A yellow center indicates there is too much moisture in the system. It must be discharged, evacuated, and

charged again.

A milky- white or bubbly liquid indicates the system has a low charge.

A clean, bubble-free liquid around the center indicates the system is fully charged.

23. If the charge is still low, carefully add refrigerant.

CAUTION

Severe damage can affect the compressor. Never introduce liquid refrigerant into the low

pressure (suction) charging valves.

Set the refrigerant cylinder to deliver gas only.

WARNING

The cylinder may rupture and cause personnel injury. Never introduce a high discharge

pressure into a refrigerant cylinder.

b) Ensure the pressure gauge valve is closed.

c) Open the compound gauge and charge valves.

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