REFRIGERANT SYSTEM SERVICE

TM 9-4120-430-14

0045 00

DIRECT SUPPORT MAINTENANCE

AIR CONDITIONER, COMPACT, HORIZONTAL

REFRIGERANT SYSTEM SERVICE - (PURGING)

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)

Recovery and Recycle Unit, Refrigerant (Item 5, WP 0067 00)

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

Materials/Parts

Nitrogen (Item 4, WP 0069 00)

References

WP 0083 00 (MAC)

Personnel Required

One

Equipment Condition

Refrigerant system discharged (WP 0049 00)

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.

WARNING

The refrigeration system must be purged with dry nitrogen,

during any brazing operation performed on any component.

A flow of dry nitrogen at the rate of less than 1 to 2 cfm (0.028-0.057 m3/minute)

should be continued during all brazing operations to minimize internal oxidation and

scaling.

CAUTION

Nitrogen cylinders are pressurized containers. The pressure in the cylinder can

exceed 2000 psi. A nitrogen pressure regulator must be used at all times when

nitrogen is used for leak check or purge operations.

CAUTION

Nitrogen is an inert gas. However, it presents the danger of

asphyxiation and therefore, must be discharged in a

ventilated location.

0045 00-1