TM 5-6640-212-14
Figure 1-6. Interior Lights
return line, and a 56-gallon water tank. Water may be
(4) Blackout lights. Two 110-volt blackout dome
supplied from the water tank by the water pump, or the
lights are installed in the laboratory compartment and
pump may be bypassed and an external source of water
one is installed in the rear compartment. Two of the
(not to exceed 70 psi) (31.8kg/sq cm) used. A gate valve
dome lights in the utility compartment contain a 110-volt,
allows the use of either method of water supply. The
red, blackout bulb. A 24-volt blackout dome light is
water supply line pipes water to all parts of the laboratory
installed in each of the three compartments.
compartment. The line has seven outlet valves, two on
the left wall, four on the right wall, and one in the fume
1-8. Piping for Utility Systems. Four utility systems
hood. The water return line carries off water discharged
provide the water, compressed air, vacuum, and propane
from condensers and other apparatus that require
gas required by the laboratory equipment. Piping for the
constant water circulation. The return line has two inlet
utility systems is illustrated in figure 1-7. Copper tubing
valves on the left wall. The water tank can be filled
is used in all utility systems. All piping originates at
through a pipe fitting on top of the tank or by attaching a
equipment in the utility compartment, except the propane
water source to the inlet connection on the roadside of
gas lines which originate in the rear compartment.
the van. Two filters, one between the inlet and the
a. Water. The dual water system originates at
supply lines and one between the pump and supply line,
the water pump in the utility compartments. The system
insure clean water to the system.
consists of a water supply lines, a water
1-8
