Onan CCKB User Manual

FUEL
Fuel Connection (Gasoline): For gasoline-fueled
generating sets, other than the contractor and por¬
table models which have their own fuel tank, connect
a fuel line to the fuel pump inlet, which is threaded
1/8-inch NPTF (National Pipe Thread Female). Use a
flexible line next to the unitto prevent transmission of
vibration to the fuel line.
Fuel Connection (Gaseous): For gaseous-fueled
generating sets, check with your local supplierforgas
and pressure regulations. See Figure 4. Provide a
manual gas shutoff. A filter in the line may also be
necessary. Electric solenoid shutoff valves are usual¬
ly required for indoor automatic or remote starting
installations. Connect the solenoid wires to the
battery circuit to open the valve while the unit is
running. Also install a demand-type regulator and
locate It near the generating set to aid starting
(regular line pressure must be within 2 to 8 ounces 157
to 227 g]).
An auxiliary reservoir fuel tank is often used for
standby installations. For these installations, the fuel
line connections must be changed as shown in Figure
VENT CAP
(Install at least 3 feet
above reservoir tank)
5/16’* VENT LINE
TO EXTERIOR OF BUILDING
- V
RESERVOIR TANK
(Mount above carburetor
bowl level)
5/16” FUEL LINE
FROM FUEL PUMP
5/16” LINE TO
ENGINE CARBURETORl
^3/8” RETURN LINE
TO MAIN FUEL TANK
J
Always use flexible tubing between engine and gas demand
regulator to absorb vibration.
FIGURE 5. AUXILIARY RESERVOIR FUEL TANK
Gasoline Tank: If a separate fuel tank is used, install
the tank so its bottom is less than 4 feet (1.2 m) below
the fuel pump. The tank top must also be below the
fuel pump level to preventsiphoning. If thefuel tank is
shared with another engine, use a separate fuel line.
If the fuel must be listed overfourfeet (1.2 m), install
an auxiliary electric fuel pump at the fuel supply.
j WARNING^ In most vehicle applications since August,
1972, the vehicle uses an Evaporative Emis¬
sion Control System. These systems may become pressurized if the
normal venting system becomes plugged. If this occurs when the
generating set is not running and especially If vehicle is moving,
gasoline can be forced through the carburetor, flooding the
generator set. For this reason a separate manual or electrical fuel
shut-off MUST be provided in thefuel line between the supply tank
and the generator set fuel pump inlet to prevent flooding the
generator set when not in use.
A776
^ PIPE PLUG
[1— N I P P L E
90® ELBOW
REDUCING BUSHING
coptional>
DEMAND-TYPE
GAS REGULATOR
ADJUSTING SCREW
.VENT
/TO CONVENIENT GROUND
ON GENERATING SET
TO CONTROL TERMINAL F S
ELECTRIC SOLENOID '
SHUT OFF VALVE
manual
SHUT OFF
,/
7^ 4 gas SUPPLY LINE
— DRY FUEL
filter
FIGURE 4. CONNECTIONS FOR GAS LINE TO CCKB
6

Onan CCKB Specifications

General

Engine Model	CCKB
Fuel Type	Gasoline
Cooling System	Air-cooled
Phase	Single-phase
Governor Type	Mechanical
Rated RPM	1800 RPM
Frequency	60 Hz
Ignition System	Battery Ignition
Starting System	Electric
Voltage	120/240 V
Rated Output	4.0 kW (5.0 kVA)
Maximum Output	5.5 kW
Oil Capacity	2 quarts
Generator Type	Revolving field
Fuel Consumption at Full Load	0.75 GPH
Fuel Consumption at Half Load	0.4 GPH