EVAPORATOR COIL INSPECTION AND CLEANING

TM 9-4120-428-14

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UNIT MAINTENANCE

AIR CONDITIONER, HORIZONTAL, COMPACT

(NSN 4120-01-502-1319)

EVAPORATOR COIL INSPECTION AND CLEANING

INITIAL SETUP:

Equipment Condition

Tools

Remove Supply Air Louver (WP 0022 00)

Refrigeration Unit Service Tool Kit, WP 0000 00, Item

Remove Mist Eliminator (WP 0024 00)

Scrub Brush, WP 0000 00, Item 2

Safety Glasses, WP 0000 00, Item 2

WARNING

Compressed air used for cleaning purposes will not exceed 30 psi (2.1 kg/cm).

Do not use steam to clean coil.

INSPECTION

1. Check for and clean dirt that has accumulated on the unit

2. Check the fins for dents, bent edges, or any condition that would block or distort airflow. Straightened all damaged

fins with a plastic fin comb.

WARNING

Compressed air used for cleaning purposes will not exceed 30 psi (2.1 kg/cm).

Do not use steam to clean coil.

CLEANING

Clean the coil (1) with a soft bristled brush and use the compressed air at 30 psi (2.1 kg/cm) or less from the inside

of the coil to blow the dirt out. Use caution to avoid fin damage. When using compressed air, wear safety glasses or

goggles. Dirt can be blown into your eyes. Should a leak or major damage occur, notify your supervisor.

NOTE

FOLLOW-ON MAINTENANCE:

Install mist eliminator (WP 0024 00)

Install supply air louver (WP 0022 00)

END OF WORK PACKAGE

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