TM 5-6115-593-12
TO 35C2-3-463-1
c. Indoor Installation. Keep the area well
ventilated at all times, so that the engine
generator set will receive a maximum supply
of air. If a free supply of fresh air is not
available, provide duct work, with an opening
at least as large as the radiator, to the outside
of the installation. If louvers are used at the
air entrance, increase the duct work size by
25 to 50 percent. Loosen the screw and nut
which secure the weather cap to the exhaust
outlet and remove the weather cap. Install a
gas-tight metal pipe exhaust outlet to the
outside of the installation. The termination of
the exhaust pipe shall be such that hot gases
or sparks will be discharged harmlessly and
will not be directed against combustible
material or into an area containing flammable
gases or vapors. Use as few bends in the
pipe and as short a pipe as possible. The
exhaust pipe should include a low point with
suitable means for draining of condensate.
Provide metal shields, 12 inches (305 mm)
larger in diameter than the exhaust pipe
where the line passes through flammable
walls. Wrap the exhaust pipe with asbestos if
there is any danger of anyone touching it.
Refer to figure 4-6 for dimensions, air flow
requirements.
WARNING
Do not operate the engine generator set
in an enclosed area unless the exhaust
gases are piped to the outside. Inhalation
of exhaust fumes will result in serious
illness or death.
d. Leveling. Set up the unit as level as possible
(within 5 degrees), and keep it as level as
possible during operation.
e. Grounding. The engine generator set must be
grounded prior to operation. The ground can
be, in order of preference: (1) an underground
metallic water piping system, (2) a driven
metal rod, or (3) a buried metal plate (figure
4-7). If the effectively grounded portion of
the buried metallic water pipe is less than 10
feet (3 m) due to insulated sections or joints,
this preferred grounding method must be
supplemented by an additional driven metal
rod ground or a buried metal plate ground. A
driven metal ground rod must have a
minimum diameter of 5/8 inch (16 mm), if
solid, or 3/4 inch (19 mm) if pipe, and driven
to a minimum depth of 8 feet (2.4 m). A
buried metal ground plate must have a
minimum area of 9 square feet (0.8 m ),
minimum thickness of 1/4 inch (6.4 mm), and
be buried at a minimum depth of 4 feet (1.2
m). The ground lead must be at least No. 6
AWG copper wire. The procedures for
making a ground connection are shown in
figure 4-7.
f. Slide Hammer Procedure.
WARNING
Nuts must be tight on the slide hammer rod.
Loose hardware may result in serious injury.
CAUTION
The slide hammer (figure 4-7, sheet 2) striker
plate and top nut must be tightened to the end
of the threads on the slide hammer rod. The
slide hammer rod and ground rod section
must make firm contact inside the ground rod
coupler. Damage to rods, plate and couplers
could result if left loose.
NOTE
If the slide hammer is assembled, go to
step (b).
(a) Connect the slide hammer striker plate (1) to
bottom of the slide hammer rod (2). Tighten
to the end of threads. Connect lockwasher (3)
and nut (4) to bottom of the slide hammer rod
(2). Tighten firmly against the striker plate
(1). Connect the ground rod coupler (5) to the
bottom of the slide hammer rod (2). Connect
the ground rod section (6) to the other end of
the ground rod coupler (5). Tighten the
ground rod section (6) to make firm contact
with the slide hammer rod (2).
(b) Remove nut (4) from the top of
4-12
