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Page Title:
REFRIGERANT SYSTEM SERVICE - (PRESSURE TESTING) |
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 TM 9-4120-430-14
DIRECT SUPPORT MAINTENANCE
AIR CONDITIONER, COMPACT, HORIZONTAL
REFRIGERANT SYSTEM SERVICE - (PRESSURE TESTING)
INITIAL SETUP:
Tools and Special Tools
Tool Kit, General Mechanics (Item 1, Table 2, WP 0067 00)
Tool Kit, Service, Refrigeration Unit (Item 2, Table 2, WP 0067 00)
Mask, Air Filtering (Item 29, Table 1, WP 0069 00)
References
WP 0067 00 (MAC)
Personnel Required
One
Equipment Condition
Main power source is disconnected
SERVICE
PRESSURE TESTING
WARNING
Ensure power source is disconnected.
WARNING
Be sure that the manifold hoses are correctly connected. BLUE Hose = Low Pressure, RED
Hose = High Pressure
Service Valve Access Cover
1.
Remove screws from service valve access cover.
2.
Remove service valve access cover.
Charging Valve Caps
Remove caps from high and low pressure service valves.
Refrigeration System Pressure Testing
1.
Connect low pressure gauge hose of manifold valve to suction service valve. See Figure 1.
2.
Check the manifold valves are closed.
3.
Connect high pressure hose of manifold valves to discharge service valve.
4.
Purge hoses. Open momentarily and close discharge and suction hose connections at charging manifold.
5.
Start air conditioner. With the unit operating, allow gauges to stabilize. Take reading of the two gauges.
0050 00-1
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