OPERATION UNDER WET OR HUMID CONDITIONS

TM 9-4120-428-14

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NOTE

Never operate the unit without having the air filters in place.

OPERATION UNDER WET OR HUMID CONDITIONS

WARNING

Make sure power is disconnected from air conditioner before touching any wiring or

other electrical parts.

The Keco model F9000H-4SPFI air conditioner is designed for normal exposure to the

elements, so it is reasonably waterproof. Take special precautions to keep equipment dry.

If installed outdoors, cover equipment with a waterproof cover when not in use. Remove

cover during dry periods. Take all necessary precautions to keep electrical components

free from moisture. Keep vent damper actuator closed during heavy rain.

OPERATION IN SALT AIR OR SEA SPRAY AREAS

WARNING

Disconnect power source prior to washing the air conditioner.

Salt air or sea spray may cause similar clogging problems as encountered when operating in a dusty or sandy environment.

The nature of salt presents serious corrosion problems. When operating in a salt air or sea spray environment, frequently

clean all exposed surfaces with fresh water to remove salt deposits. Roll down and secure the fabric cover on the back of the

cabinet whenever the air conditioner is not in operation.

Wash the exterior and the condenser section frequently. Be careful not to damage the electrical system with water.

Paint all exposed areas where paint has cracked, peeled, or blistered, or report condition to unit maintenance. Cover all

exposed areas of polished metal with a light coat of grease.

OPERATION DURING EMERGENCY CONDITIONS

If the likelihood of Interim Nuclear, Biological, and Chemical (NBC) contamination exists, a suitable NBC cover plate

should be fabricated and installed in place of the fresh air filter.

When operation is anticipated under potential nuclear-biological-chemical (NBC) conditions, a NBC filtering unit should be

connected to the fresh air intake. It may be necessary to remove the guard and fabricate a special adapter for this connection.

Adjust the return air louvers in conjunction with the NBC filter controls to provide a higher overpressure within the room or

enclosure.

During periods when full electrical power is in critically short supply and the air conditioner cannot be turned off completely,

it should be operated in VENTILATE mode when possible.

END OF WORK PACKAGE

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