OPERATION UNDER UNUSUAL CONDITIONS - TM-10-4110-262-13-P0069

TM 10-4110-262-13&P

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OPERATOR'S, UNIT, AND DIRECT SUPPORT MAINTENANCE

ADVANCED DESIGN REFRIGERATOR, 300 CUBIC FOOT (ADR-300)

4110-01-465-4158 / 4110-01-465-4564

OPERATION UNDER UNUSUAL CONDITIONS

UNUSUAL ENVIRONMENT/WEATHER

Refer to Operation Under Normal Conditions (WP 0005 00) for specific operating instructions and use this

work package for further instruction if operating the ADR-300 in unusual conditions. Read all sections

that apply to the conditions to which the ADR will be exposed.

Unusual conditions include severe weather, such as

90% to 100% relative humidity;

Temperatures at or below 32 F (0 C) for a week or more;

Temperatures at or above 100 F (38 C) for a week or more;

Blowing sand or dust;

Heavy Rain; or

Snow.

Salt/ Salt Fog

High Humidity Conditions

High humidity may increase the rate at which frost accumulates on the evaporator coil. Avoid opening and

closing the cargo door more than necessary. This will reduce the amount of humid air entering the

container and the resulting accumulation of frost.

Although the RU is designed to defrost automatically, users should monitor the level of frost accumulation

on the evaporator (interior) coil. If a significant level of frost is observed, begin a defrost cycle manually

as described in Work Package 0005 00 or adjust the defrost timer as described in WP 0029 00.

Low Ambient Temperatures

Low ambient temperatures enhance the performance of the RU; however, those conditions also cause

plastic and rubber elements to stiffen and become brittle. Handle plastic and rubber parts gently in cold

weather to avoid cracking or breaking them.

The door gasket may freeze to the doorframe. So, when opening the cargo door, pull firmly and steadily

to separate the gasket from the frame.

High Ambient Temperatures

High ambient temperatures result in high refrigeration loads while degrading the performance of the RU.

Therefore, the user should try to minimize the loads on the system in this environment. Locate the ADR

such that it is shaded from the mid-day sun. Avoid opening the container door and do not hold the door

open longer than necessary. Avoid, to the extent possible, placing large, warm cargoes in the container

all at once.

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