REFRIGERANT SYSTEM SERVICE

TM 9-4120-430-14

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DIRECT SUPPORT MAINTENANCE

AIR CONDITIONER, COMPACT, HORIZONTAL

REFRIGERANT SYSTEM SERVICE - (LEAK TEST)

INITIAL SETUP:

Tools and Special Tools

Tool Kit, General Mechanics (Item 1, Table 2, WP 0067 00)

Tool Kit, Service, Refrigeration Unit (Item 2, WP 0067 00)

Mask, Air Filtering (Item 29, Table 1, WP 0069 00)

Test Equipment

Electronic refrigerant gas leak detector (See TM 9-4940-509-14&P)

Materials/Parts

Nitrogen (Item 4, Table 1, WP 0069 00)

Refrigerant R-22 (Item 10, Table 1, WP 0069 00)

References

WP 0044 00

Personnel Required

One

Equipment Condition

Main power source is disconnected

WARNING

Ensure power source is disconnected.

WARNING

Be sure that the manifold hoses are correctly connected.

BLUE Hose = Low Pressure, RED Hose = High Pressure.

NOTE

After repair or replacement of a refrigeration component, replace the filter-drier prior

to leak testing. See WP 0051 00.

SERVICE

LEAK TEST

General

The entire repaired area should be thoroughly leak tested after repair or replacement of any component, before it is

recharged with refrigerant-22. Leak testing is also the method for troubleshooting when a system has lost all or part of its

refrigerant charge through an undetermined cause..

Testing Method

There are two acceptable methods for leak testing the refrigeration system.

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