Operation in Dusty or Sandy Conditions.

TM 5-4120-222-14

Page 19, paragraph 214 is superseded as follows:

214. Operation in Dusty or Sandy Conditions.

NOTE

Unit Preventive Maintenance Checks and Services (PMCS) should be performed

at daily intervals.

a. General. Dusty and sandy conditions can seriously reduce the efficiency of the air conditioner by

clogging the air filtcr, mist eliminator, and coils. This will cause a restriction in the volume of airflow.

Accumulation of dust or sand in the condcnscr coil and/or in the compressor compartment may cause overheating

of the refrigeration system. Dust or sand may also clog the condensate trap and water drain lines.

CAUTION

Never Operate the air conditioner without having the air filters in place.

b. Protection.

(1) Shield the air conditioner from dust as much as possible.

(2) Take advantage of any natural barriers which offer protection.

(3) Limit the amount of dusty or sandy outside air introduced through the fresh air damper.

(4) Roll down and secure the fabric cover on the back of the cabinet during periods of shutdown.

c. Cleaning.

(1) Keep the air conditioner as clean as possible.

(2) Pay particular attention to the outside grilles, condenser, filters, mist eliminator, louvers, and

electrical components.

(3) In cxtreme conditions, daily cleaning of condenser, filters, and outside grilles may be necessary.

By Order of the Secretary of the Army:

CARL E. VUONO

General, United States Army

Chief of Staff

Official:

THOMAS F. SIKORA

Brigadier General, United States Army

The Adjutant General

DISTRIBUTION:

To be distributed in accordance with DA Form 1225E, (qty rqr block no. 0178)

U.S.

GOVERNMENT

PRINTING

OFFICE:

1991

554-1

23/20228

PIN: 005748-005