STARTING
When the preceding service functions have been
performed,
recheck to verify unit is ready to start.
1.
Crankcase filled.
2.
Cooling system filled.
3. Batteries charged and connected.
4.
Fuel solenoid valve open.
To start, move the "run-stop/reset-remote" switch to
the "run" position. The engine should start after a few
seconds of cranking. Immediately after start, observe
the oil pressure gauge. Normal oil pressure is
between 30- and 55-psi (207- and 380 N»m). Check
the following gauges:
1.
DC Ammeter—10 to 30 amperes.
2.
AC Voltmeter—AC generator output voltage.
3. Frequency Meter—AC generator output
frequency.
After running 10 minutes under load the water
temperature gauge should have stabilized at 180° to
195
0
F (82° to 90°C). On city water cooled units an
adjustable valve is connected in thewatersupply line.
Adjust the hand wheel valve to provide a water flow
that will keep the water temperature gauge reading
within the range of 165
0
F to 195°F (74°C to 90°C).
Break-In Note: Run set at 50 percent rated load forthe
first half-hour of initial operation after reaching
operating temperature.
Non-Start: If after a few seconds of cranking engine
fails to start, or starts and runs then stops and fault
lamp lights, refer to appropriate troubleshooting
chart, Table 3 or Table 4.
STOPPING
To reduce and stabilize engine temperatures, run the
engine at no load for three to five minutes before
shutting down.
Move the run-stop/reset-remote switch to stop posh
tion to shut down the set.
NO
LOAD
OPERATION
Periods of no.load operation should be,.heldvto.a'
minimum.
If it is necessary to keep theengine running
for long periods of time when no electric output is
required,
best engine performance will be obtained
by connecting a "dummy" electrical
load.
Such a load
could consist of heater elements, etc.
EXERCISE
PERIOD
Generator sets on continuous standby service are
required to be operative at essential loads from a cold
start in a short period of time in the event of a power
outage.
This imposes severe conditions on the engine. Fric-
tion of dry piston rings upon dry cylinder walls causes
scuffing and rapid wearing. These can be relieved by
exercising the set at least once a week for a minimum
time of 30 minutes per exercise period. Preferably,
run the set under at least 50 percent load to allow the
engine to reach normal operating temperature. This
will keep engine parts lubricated, maintain fuel prime,
prevent electrical relay contacts from oxidizing and
insure easy emergency starts. ONAN automatic
transfer switches contain an optional exercise switch
which,
by pre-selection, will start, determine run
period and shut down a set on a weekly frequency.
For example, the switch can be set for time of start,
length of run, A.M. or P.M. and day of week.
After each exercise period, top up fuel tank, check
engine for leaks and unit for general condition.
Locate cause of leaks (if any) and correct.
HIGH
ALTITUDE
Ratings apply to altitudes up to 1000 feet (304 m)
standard cooling, normal ambients and specified
fuels.
Consult factory or nearest authorized Onan
distributor for operating characteristics under other
conditions.
Engine horsepower loss is approximately 3 percent for each 1000
feet (304 m) of altitude above sea level for a naturally aspirated
engine. Use lower power requirement at high altitudes to prevent
smoke, over-fueling and high temperatures.
HIGH
TEMPERATURES
1.
See that nothing obstructs air flow to-and-from
the set.
2.
Keep cooling system clean.
3. Use correct SAE No. oil for temperature
con-
ditions.
LOW
TEMPERATURES
1.
Use correct SAE No. oil for temperature
con-
ditions. Change oil oniy when engine is warm.
2.
Use fresh
fuel.
Protect against moisture conden-
sation.
3. Keep fuel system clean and batteries in a well
charged condition.
• A. •Partially restrict cool.airf low but use care to avoid
•
overheating.
5. Connect water jacket heater when set is not
running.
6. Refer to Ford manual for further information.
• #
23
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