Air Conditioner. Refer to TM 5-4120-226-15 for the necessary air conditioner operating instructions.
Fire Extinguisher. The monobromotrifluoromethane type fire extinguisher is bracket mounted on the rear wall
of the shelter just left of the shelter door. It is generally suitable for use on all types of fires, with the exception of fires
involving LOX (liquid oxygen) generating equipment. The fire extinguisher is furnished with a disposable type cylinder.
To operate the fire extinguisher, perform the following operations:
Remove the fire extinguisher from its storage bracket.
Break the seal by pulling the safety pin from the handle.
Point the horn at base of the flame.
Depress trigger for discharge and direct the stream at the base of the fire.
Replace used cylinder with a new cylinder immediately after using.
Blackout Warning. A blackout warning system consisting of an external pushbutton switch and an internal
buzzer is provided to alert shelter personnel to extinguish all lights before the door is opened during blackout periods.
The pushbutton switch is mounted on the outside wall of the shelter to the left of the door. The buzzer is mounted on the
rear of the shelter above the main power service box. A chain mounted blackout lockpin is installed on the door center
latch plate on the interior rear left wall. When the door is closed and latched, the pin passes through a hole in the locking
mechanism to prevent the door from being inadvertently opened during a blackout.
Shelter Door Filter. An air filter is located near the center of the shelter door and incorporates an upward
hinging weather cover over the filter opening on the door exterior.
Telephone Binding Post. Two external binding posts are located on the exterior rear shelter wall to the left of
the door. They are protected by a hinged weather cover and are provided to facilitate connection of a field telephone
between the units of the special warfare printing plant.
Level Indicator. Two bubble-gage type level indicators are installed in the exterior shelter wall, one on the rear
wall and one on the left wall. During operation, the shelter should be as level as possible so as not to affect the
calibration of plant components.
Main Power Service Box. The main power service box mounted on the rear wall of the shelter to the right of
the door, contains the circuit breakers which control electrical power to the shelter components and afford overload
protection to these circuits. The circuit breakers are switch-type components which also provide a convenient means of
disconnecting power to all shelter circuits.
Light and Switches. Illumination of the shelter is provided by two rows of ceiling lights, controlled by two light
switches on the rear wall of the shelter to the left of the door. Each light fixture incorporates a ballast, a lamp starter and
a fluorescent lamp tube. Five light fixture assemblies are installed along the left and right ceiling.
Do not perform any electrical maintenance or make any electrical connection or disconnection
at the main power receptacle while the generator set engine is running.
Shut down the generator set power source in accordance with the applicable Department of the Army Technical
Position all circuit breakers in the main power service box to the right of the shelter door to off.
Position all equipment and shelter power switches to the off or neutral position.
Disconnect the main power cable from the generator power source.
Disconnect the cable from the main power receptacle.
Coil and correctly stow main power cable.