PRESSURE SWITCHES MAINTENANCE

TM 9-4120-430-14

0055 00

DIRECT SUPPORT MAINTENANCE

AIR CONDITIONER, COMPACT, HORIZONTAL

PRESSURE SWITCHES MAINTENANCE

INSPECT, REMOVAL, TEST, AND INSTALLATION

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)

Test Equipment

Multimeter

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

Materials/Parts

Nitrogen (Item 4, WP 0069 00)

References

WP 0067 00 (MAC)

Personnel Required

One

Equipment Condition

Mode selector switch in OFF position.

Main power source is disconnected

Top cover removed (WP 0018 00)

Evaporator air discharge louver removed (WP 0020 00)

Junction box partially removed (WP 0028 00)

Refrigerant system discharged (WP 0044 00)

System purged with nitrogen (WP 0045 00)

Special Environmental Condition

WARNING

REFRIGERANT-22 (R-22)

Unit contains R-22, a chemical substance which harms public health and the

environment by destroying ozone in the upper atmosphere, and that the

equipment is to be serviced by qualified personnel only.

Operation of the recovery/recycling unit must be by AUTHORIZED

PERSONNEL ONLY.

WARNING

Ensure power source is disconnected.

0055 00-1