Onan CCKB User Manual

EXHAUST
Vent all exhaust gases outside. The exhaust outlet
must not terminate near air inlet vents or combustible
materials. Avoid sharp bends and use large radius
elbows in the exhaust piping. If the piping cannot be
pitched downward, install a condensation trap in the
system where a rise begins (Figure 6). The exhaust
line connects to a one-inch NPTF outlet at engine.
Use one pipe size larger for each ten feet in length.
Position the exhaust outlet away from the set air
intake.
WARNING I POISONOUS exhaust gas outside
enclosure. Inhalation of exhaust gases can
result in serious injury or death.
IF EXHAUST LINE MUST BE PITCHED
UPWARD CONSTRUCT A TRAP OF PIPE
FITTINGS AT POINT OF RISE
[
AVOID SHARP BENDS
DRAIN CONDENSATION TRAP
PERIODICALLY
FIGURE 6. CONDENSATION TRAP
Exhaust piping must not come closer than 9 inches to
combustible material. Where the system leaves the
building, install a thimble. See Figure 7.
SINGLE THIMBLE DIAMETER 12
LARGER OR DOUBLE
^ VENTILATED THIMBLE
DIAMETER 6 LARGER
THAN EXHAUST LINE
HOLES IN END
INNER SLEEVE
EXHAUST LINE PASSING THROUGH
It WALL OR PARTITION
FIGURE 7. EXHAUST THIMBLE
OIL DRAIN
If desired for convenience in draining oil, remove the
oil drain plug and install an extension pipe and
coupling. Oil base has 3/8-inch pipe tapped hole.
REMOTE START-STOP SWITCH (Optional)
For remote control starting and stopping, use three
wires to connect the remote switch (SPOT, momen¬
tary contact, center-off type) to the terminal block
marked B+, 1, 2, 3, in the set control box. Use #18
gauge wire for runs up to 250 feet (76 m) and larger
wire for longer runs. See Figure 8.
LOAD WIRE CONNECTIONS
The generating set nameplate shows the electrical
output rating of the set in watts, volts and hertz. The
portable models are prewired and have a receptacle
box with two duplex 120-volt (15-ampere), grounding
receptacles and two 240-volt (20-ampere), twist-lock
receptacles. For the other generating sets, the wiring
diagram shows the electrical circuits and necessary
connections for the available output voltage.
A qualified serviceman orelectrician should make the
installation and the installation should be inspected
and approved to meet all applicable code re¬
quirements. The AC output box has provisions to
accommodate load wires. Use flexible conduit and
sufficiently large stranded load wires near the set to
absorb vibration. Strip the insulation from the wire
ends as necessary for clean connections. Connect
each load wire to the proper generator output lead
inside the AC output box. Insulate bare ends of
ungrounded wires. Install a fused main switch (or
circuit breaker) between the generating set and the
load.
Reconnectible, Single-Phase Generator: Voltage
selection on reconnectible sing ie-phase generators is
120/240 volts, 3 wire; 120 volts, 2 wire; or, 240 volts, 2
wire (Figure 9). Use the connection for two-wire
service when one load exceeds one-half the rated
capacity. Balance the load when connecting for
three-wire service. Current for any one output lead
must not exceed nameplate rating. Serious
overloading can damage the generator windings.
When two or more single-phasecircuitsareavailable,
divide the load equally between them.
Three-Phase, Four-Wire, Wye Connected
Generators: A three-phase, four-wire generating set
produces single-phase current of the lower
nameplate voltage and three-phase current of the
higher nameplate voltage (Figure 10). For single¬
phase current, connect the neutral (white) load wire
to the grounded terminal. Connect the “hot”
(black) load wire to any one of the other three
terminals . . . M', or M^. Three separate single¬
phase circuits are available, with not more than one-
third the rated capacity of the generating set from any
one circuit. For three-phase current, connect
separate load wires to eachofthegeneratorterminals
M\ and M^. Single-phase current of the higher
nameplate voltage is obtained between any two three-
phase terminals.
FIGURE 8. REMOTE START-STOP SWITCH
7

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