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 TM 10-4110-262-13&P
OPERATOR'S, UNIT, AND DIRECT SUPPORT
ADVANCED DESIGN REFRIGERATOR, 300 CUBIC FOOT (ADR-300)
THEORY OF OPERATION
General
The ADR-300 is designed to provide refrigerated storage for a variety of items and commodities ranging
from food to medical supplies to cadavers. The system can operate worldwide while maintaining interior
temperatures between 0 F and 60 F. The system will operate continuously given an external source of
electrical power. It is also designed to minimize heat leakage to maintain interior temperature for an
extended period with no externally-supplied power.
The system consists of two main subsystems, the insulated container (IC) and the refrigeration unit (RU).
These subsystems are described below.
Insulated Container
The IC is an insulated box constructed from foam-filled panels mounted on an aluminum skid. Access to
the interior is through the cargo door on one end of the container. A switch immediately above the door
(inside the IC), energizes an interior light above the door. Power is supplied to the switch and light
through a surface-mounted conduit on the upper left corner of the IC interior.
The container interior is outfitted with two sets of five shelves that are removable. Each shelf provides a
storage surface measuring 72 3/4 x 21 in. (185 x 53 cm) and can hold up to 300 lb (136 Kg). The shelves
can be quickly adjusted and/or disassembled and removed from the container to accommodate bulk
materials or facilitate cleaning of the interior.
Bulk cargos (cargos not stored on shelves) can be secured by lashing them to the tie-down rings located
on the container floor. Fourteen tie-down rings are distributed around the perimeter of the container
interior. These rings are each capable of resisting up to 7,500 lb of tension.
The container floor includes a drain for removing liquids trapped by the doorframe. The drain transports
fluids from the interior, through a one-inch diameter tube, to the front of the skid. A plug at the exit end
seals the drain. This plug also serves as a pressure release in the event of a sudden decrease of exterior
pressure.
0003 00-1
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