Onan MCCK - OPERATION; INITIAL START; STARTING SEQUENCE; STOPPING SEQUENCE

OPERATION
INITIAL START
Check the engine to make sure it has been filled with
oil and fuel. Fill cooling system and prime water pump
(Fig.8). If engine fails to start at first attempt, inhibitor
oil used at the factory may have fouled the spark plugs -
remove, clean in gasoline, dry thoroughly and install
Heavy exhaust smoke when the engineis first started is
normal, and is caused by the inhibitor oil.
NOTE: The Control-O-Matic will run the bilge blower
for about 5 minutes before cranking the engine. The
blower cycle may be eliminated; see Conhrol-O-Matic
section.
Crankcase Oil: Use a good-quality detergent oil that
meets the API (American Petroleum Institute) service
designations MS.MS/DG, or MS/DG. Recommended SAE
oil numbers for expected ambient temperatures are as
follows:
OIL CAPACITY - 4 QTS.
Above 90° F SAE 50
30°F to 90° F SAE 30
0°F to 30° F SAE 10W
Do not use service DS oil. Do not mix brands or grades.
Refer to Maintenance Section for recommended oil chan¬
ges and complete lubricating oil recommendations.
Rec«HKended Fuel: Use clean, fresh, regular grade
automotive gasoline. Do not use highly leaded premium
types. Never fill the tank when the engine is running.
Leave some fuel expansion space. Open fuel line valve
(when used).
The following shows the sequence of operation. This
shows operation with manual control at the plant and
automatic control .either at the plant or remotely located.
STARTING SEQUENCE
1. Operator pushes START button or plant is started by
remote control.
2. Start solenoid energizes.
3. Battery current flows to
a) series field
b) STOP relay
c) eleetric choke
4. Ignition coil fires spark plugs when breaker points
open.
5. Engine starts
6. Operator releases START button
7. Start disconnect relay energizes
8. Engine continues running.
STOPPING SEQUENCE
1. Operator pushes STOP button
2. Stop relay opens ignition circuit
3. Engine stops
4. Operator releases STOP button.
EMERGENCY SHUTDOWN
An emergency stop is caused by low oil pressure or high
water temperature.
1. Low oil pressure switch closes.emergency relay ener¬
gizes, opening ignition circuit.
2. High water temperature switch opens ignition circuit.
3. Engine stops.
NOTE: If shutdown is caused by high water temperature,
plant will crank for about 90 seconds. If it does not
start, it will stop cranking.
APPLYING LOAD
Allow plant to warm up before connecting a heavy load
and keep the load within nameplate rating. Continuous
generator overloading may cause high operating tempera¬
tures that can damage the windings
BATTERY CHARGING
The battery charge rate is controlled by a charge reg¬
ulator. This regulator is pre-set to allow the proper charge
rate at operating speed. Do not attempt to change this
setting.
This regulator is pre-set to allow the proper charge rate
at operating speed.Do not attempt to change this setting.
SAFETY DEVICES
A high-water-temperature switch in the cooling system
stops the plant if the engine overheats.
The engine has a lew-oil-pressure switch which will
stop the plant through an emergency relay in the control
if oil pressure drops below a safe operating pressure.
After an emergency stop, investigate and correct the cause.
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