Onan DYC Series Operator's Manual And Parts Catalog page 19

DAYTANK
Generator set installations may be equipped with an
optional separate fuel day tank. A float operated valve
controls fuel flow into the fuel tank. The correct level
is maintained to assure a constant source of fuel. It is
necessary to install an overflow line between the day
tank and main fuel tank. Refer to the installations
included with the tank. See Figure 12 for an example
of a day tank installation. Tank and lines must be
below level of injector pump return outlet.
F U E L PUMP
RETURN LINE
F U E L
F I L T E R
F U E L
PUMP
"DAY* TANK: -
5 G A L . (20 litre)
MINIMUM C A P A C I T Y
-INJECTOR
F U E L RETURN
LINE
All models require fuel return line from
injectors to tank.
V E N T LINE •
V E N T E D
. F I L L CAP F L O A T T Y P E SWITCH
CONNECT TO
A C O U T P U T
CD
F U E L TRANSFER
PUMP - E L E C T R I C
MOTOR DRIVE
LARGER ^ - - r * n
OVERFLOW 1
LINE
S U P P L Y
L I N E
• - F I L L
P I P E
UNDERGROUND
F U E L T A N K
FIGURE 12. DAY TANK (TYPICAL)
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