EXHAUST
|
WARNING
Inhalation of exhaust gases can result in
death.
Engine exhaust gas must be piped outside building
or
enclosure.
Do not
terminate exhaust pipe near inlet
vents
or
combustible materials. An approved thimble
(Figure
11)
must
be
used where exhaust pipes pass
through walls
or
partitions. Pitch exhaust pipes
downward
or
install
a
condensation trap {Figure
12)
at the point where
a
rise in the exhaust system begins.
Avoid sharp bends; use sweeping.long radiuselbows.
Provide adequate support
for
mufflers
and
exhaust
pipes.
Refer
to
Figure
7
for a typical exhaust installa-
tion.
Shield orinsulate exhaust lines
if
there isdanger
of personal contact. Allow
at
least 9-inches (230
mm)
of clearance
if the
pipes
run
close
to a
combustible
wall
or
partition. Use
a
pipe
at
least as large as the.2-
inch
(50 mm)
pipe size outlet
of the
engine with
a
flexible portion between the engine and
the
muffler.-
,
IF
EXHAUST LINE MUST
BE
PITCHED UPWARD,
.CONSTRUCT
A
TRAP
OF
PIPE FITTINGS
AT
POINT
OF
RISE
DRAIN CONDENSATION TRAP
PERIODICALLY
FIGURE 12. EXHAUST CONDENSATION TRAP
RAIN
CAP
DRIP
CAP
HOLES
IN END OF
INNER SLEEVE
ROOF
9" MINIMUM
(230
mm)
9-MINIMUM
(230 mm)
m ,Y HOLES
IN
Jf
END OF
INNER SLEEVE
WALL
OR
PARTITION-HjyMm
11
V
NOTE:
VENTILATED THIMBLE DIAMETER
6"
LARGER
THAN EXHAUST LINE
(152 mm)
FIGURE 11. EXHAUST THIMBLE
Do not connect a flexible line to the exhaust manifold.
Minimum diameters
and
maximum lengths
of
pipe
(with critical muffler[s])
are as
follows:
Single Exhaust system:
2.5-inch
(67 mm)
pipe
34
feet (10.5
m)
3.0-inch
(76 mm)
pipe 166 feet .(50.5
m)
Maximum permissible exhaust restriction - (back
pressure)
is
20.4-inches H2O (5.1
kPa).
16
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