Operation in Dusty or Sandy Conditions.

2-14. 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 filter, mist eliminator, and coils. This will cause a restriction in the volume of airflow.

Accumulation of dust or sand in the condenser 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 extreme conditions, daily cleaning of condenser, filters, and outside grilles maybe necessary.

2-15 Operation Under Rainy or Humid

If the unit is outside and not operating, protect it

with a canvas or other waterproof material.

Remove cover during dry periods. Open the front

access panel to allow unit to dry before operating.

Use caution when operating electrical equipment

2-16. Operation in Salt Wafer Areas

Wash the exterior of the unit with clean, fresh

water at frequent intervals. Do not damage the

electrical equipment during the cleaning opera-

tion. Coat exposed metal surfaces with rust

proofing material. Remove corrosion and paint the

exposed metal surface.

AGO 20053A