Section III. PRINCIPLES OF OPERATION
SYSTEM TECHNICAL PRINCIPLES OF OPERATION.
Refrigerated Container. The refrigerated container is designed for use with the model (F9000RE)
Refrigeration Unit installed on the front wall panel. Power to operate the refrigeration unit and the container
interior light is provided by the 10 Kw generator set or outside source. The refrigerated container is a
framed, insulated box that prevents the thermal transfer of heat into or out of the container. The floor is
ribbed to permit proper air circulation around cargo when the container is fully loaded. Two insulated and
sealed exterior door panels open the full width of the container to allow easy loading and unloading. A light
inside the container is controlled by a switch mounted on the interior wall. A fuel tank, mounted on the front
of the container, stores extra fuel for the generator set.
Refrigeration System. Interior container temperature is controlled and maintained by the refrigeration unit
mounted on and through the front wall section of the refrigerated container. The refrigeration unit consists
provides cooling by heat absorption, and heating through the use of electrical resistance elements (TM 9-
4110-258-13). Electrical power to operate the refrigeration unit is supplied by the 10 Kw generator set. An
external power source may also be used in place of the generator set.
COMPONENT TECHNICAL PRINCIPLES OF OPERATION.
Container. Insulation built into the walls, floor, and ceiling reduces the gain and/or loss of heat between the
container interior and ambient conditions.
Doors. Two doors provide access to the container interior. Each door is insulated and seals tightly against
the container frame when closed. The right access door contains an emergency escape door to prevent
personnel from being trapped inside. The emergency door can only be removed from inside the container.
Light. The 100 watt, 110 volt interior light receives electrical power from 10 kw Gen Set or external power
source. The light is controlled by a hand operated switch mounted overhead near the right door.
Fuel Tank. The metal
26 gallon fuel tank stores fuel for the generator set. Fuel level
float actuated fuel gage. Fuel lines connect the tank to the generator set (refer to TM 5-6115-585-12/34 for
fuel line connection).
Temperature Recorder. The temperature recorder maintains a 24 hour record of the container's internal
temperature. A thermal sensing bulb, mounted on the inside container wall, causes the cartridge pen to
move up or down on the paper chart. At the same time, a spring driven timer turns the chart paper. As the
pen moves along the paper, a permanent record of the time and temperature is made. The timer must be
wound at least every 30 days.
Power Adapter Cable. The power adapter cable distributes electrical power from the generator set
refrigeration unit. The receptacle end of the cable connects to the refrigeration unit power cable. The
electrical leads on the opposite end connect to the generator set terminal box (refer to TM 5-6115-585-
Exhaust Extension. The exhaust extension diverts exhaust gases from the generator set
to the top
container frame. A rain cap on top of the exhaust tube prevents rain, birds, and contaminants from entering
the exhaust tube.
Refrigeration Unit. For detailed Refrigeration Unit component principles of operation, refer to TM 9-4110-
Generator Set. For detailed Generator Set component principles of operation, refer to TM 5-6115-585-