OPTIONAL ITEMS
L.O.P.=
LOW OIL PRESSURE SWITCH
H.W.T.=
HISH WATER TEMP.
SWITCH IS
O.S.= OVERSPEED SWITCH -r.
FIGURE 13. OPERATING CYCLE
Push the RUN-STOP switch to its RUN position
(engine will preheat and crank in about 20 seconds).
After engine starts, see that the oil pressure gauge
reads at least 20 psi. Relief valve pressure is not
adjustable.
When starting set from a remote station, the switch on the set
control must be in its REMOTE position.
When engine
,
comes up to speed, cranking will
automatically stop through the centrifugal switch and
start-disconnect relay. If the engine fails to start in
from 45 to 120 seconds, the cranking limiter will trip
and cranking will stop. If this occurs on the initial start
or from other conditions such as out of
fuel,
remedy
the cause. Wait one minute before resetting the
cranking limiter and reattempting to start.
Make sure centrifugal switch closes durjng speed
buildup (about 900 rpm's).
Do not apply overvoltage to the starting
circuit at any time. Overvoltage will destroy
the glow plugs and air heater in 2 to 3 seconds. If it becomes'
necessary to use an additional source of power to start the set —
use a 12 volt battery connected in parallel.
AUTOMATIC
STARTING
AND
STOPPING
Separate controls may be used for automatic start
and stop, but must provide engine preheating.
The automatic control has a time delay relay to
preheat glow plugs and the manifold heater for about
20 seconds before cranking occurs. The time delay
relay prevents immediate engagement of the starter in
case the load is reapplied before the engine stops.
STOPPING
1.
Push start-stop switch to stop position.
2.
Release switch when setstops. If stop circuitfails,
close fuel valve.
APPLYING
LOAD
If practicable, allow set to warm up before connecting
a heavy
load.
Continuous generator overloading may
cause high operating temperatures that can damage
the windings. The generator can safely handle an
overload temporarily, but for normal operation, keep
the load within nameplate rating. The exhaust system
may form carbon deposits during operation at light
loads,;
apply full load occasionally before shut-down
to prevent excessive carbon accumulations.
Try to connect the load in steps instead of full load at
one time. Most installations use a line switch that
must be closed to connect a portion of the
load.
18
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