Onan DYG Series Operator's Manual And Parts Catalog page 17

EXHAUST
WARNINCjj
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 8) must be used where exhaust pipes pass
through walls or partitions. Pitch exhaust pipes
downward or install a condensation trap (Figure 9) 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 5 for a typical exhaust installa-
tion. Shield or insulate exhaust lines if thereisdanger
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 6-
inch (152 mm) pipe size outlet of the engine with a
flexible portion between the engine and the muffler.
IF E X H A U S T L I N E M U S T B E P I T C H E D U P W A R D ,
. C O N S T R U C T A T R A P O F P I P E F I T T I N G S A T
P O I N T O F R I S E
D R A I N C O N D E N S A T I O N T R A P
P E R I O D I C A L L Y
FIGURE 9. EXHAUST CONDENSATION TRAP
R A I N C A P
D R I P C A P
H O L E S IN E N D O F
I N N E R S L E E V E
R O O F
9 MINIMUM
(230 mm)
9 MINIMUM
(230 mm)
W A L L O R P A R T I T I O N
H O L E S IN
E N D O F
I N N E R S L E E V E
N O T E : V E N T I L A T E D T H I M B L E D I A M E T E R 6 "
B4i (ISO mm) L A R G E R T H A N E X H A U S T ' L I N E .
Do not connect a flexible line to the exhaust manifold.
Minimum diametersand maximum lengthsof pipeare
as follows:
Single Exhaust^system:
5- inch (127 mm) pipe '. 50 feet (15 rri)
6- inch (152.4 mm) pipe 150 feet (46 m)
8-inch .(203.2 mm) pipe 500 feet (152 m)
Maximum permissible exhaust restriction (back
pressure) is 2-inches Hg. (6754 N/m 2 ).
FIGURE 8. EXHAUST THIMBLE
15