Icom IC-M71 Instruction Manual page 36

TM 10-7360-226-13&P
CONTAINERIZED KITCHEN (CK) 0003 00
THEORY OF OPERATION
COOKING EQUIPMENT – MBUs
Operation of the MBUs is described in detail in TM 10-7310-281-13&P.
The MBUs receive fuel through a refueling system which provides fuel to eight locations (five
in the cook center and three in the dual oven assembly). In the mechanical room, fuel comes
from a 5-gallon fuel can fitted with a fuel can adapter to which the fuel line is connected. The
fuel line splits into two branches, one to the cook center peninsula and the other to a
connection at the bottom of the food preparation area wall (near the access door for the
generator controls). A permanently mounted fuel line assembly on the back of the oven base
plugs into this connection to supply the ovens and tray pack heater.
A power converter, mounted on the wall inside the mechanical room, provides 24 VDC power
for the MBUs. A permanently mounted power cable runs the length of the cook center
peninsula. A permanently mounted cable on the back of the dual oven assembly plugs into
an outlet in the ceiling raceway to power the MBUs for the ovens and tray pack heater. An
ON/OFF, MBU POWER switch on the wall next to the cook center allows the operators to
quickly shut off all MBUs.
ELECTRICAL SYSTEM
Input electrical power for the CK is 120/208 VAC, 60 Hz, three phase. Power is supplied
from either the onboard generator or from an external source connected to the Power
Entrance Panel (PEP) in the mechanical room (see WP 0002 00, Figure 5). Two sets of
contactors in the PEP, operated by pushbutton switches on the Main Control Panel (MCP),
connect the desired power source. Circuit interlocks prevent both sources from being
connected at the same time.
The MCP displays the status of the power sources and contains the switches for source
selection. It also contains the lighting controls and the emergency stop (E-Stop) switch.
The E-Stop switch uses the contactors in the PEP for emergency system shutdown.
Depressing the E-Stop opens both sets of contactors, disconnecting both power sources to
ensure that the distribution and control panels are completely de-energized. Contacts in the
E-Stop also shut down the generator.
The Power Distribution Panel (PDP), located on the serving wing wall, receives power from
the PEP and distributes it through individual circuit breakers to the various branch circuits of
the kitchen.
ENVIRONMENTAL CONTROL UNIT (ECU)
The Environmental Control Unit circulates heated or cooled air to the occupied areas of the
kitchen. Using a wall-mounted control switch, kitchen personnel select the desired operating
mode (off, heat, low cooling or high cooling). The operation of this switch is described in
detail in WP 0005 00.
The system draws air from the kitchen through a wall-mounted return air plenum in the food
preparation area. Removable, washable filters in the plenum remove dust and other
particulates. The air then passes through the air conditioners to the outlet plenum, in the
0003 00-1