Generac Power Systems Air-cooled Industrial Mobile Generator 09843-2 - Manual (Page 9)

Generac IM-72LP Industria! Mobile Generator
2. If you have not started the engine in more that two weeks,
press the Fuel Pump Primer switch and hold it for about 30
seconds to activate the automatic shut-off function. How­
ever, if the engine is warm, skip step 2.
3. To crank and start the engine, hold the start/stop switch at
START. Release the switch when the engine starts.
CAUTION: If the engine does not start after it has
been cranking for 15 seconds, release the
start/stop switch and try again. Holding the switch
for longer than 15 seconds can damage the starter
motor.
4. Let the engine run at no-load for a few minutes to stabilize
and warm up the engine.
5. Turn ON electrical loads, using whatever means provided
(such as a main circuit breaker or transfer switch).
STOPPING THE GENERATOR
1. Turn OFF all electrical loads, using whatever means pro­
vided (such a main circuit breaker or transfer switch).
2. Place start/stop switch in its STOP position.
25 HOUR BREAK-IN PERIOD
The first 25 hours of operation is the break-in period for the
generator. Properly breaking in the generator is essential to
reducing oil consumption and enhancing engine performance.
During the break-in period, observe the following rules:
• For the first 25 hours, run the generator at varying electri­
cal loads, to help set the engine piston rings properly.
• Following the initial 25 hour break-in period, avoid light elec­
trical loads for the next 75 hours of operation. The unit should
be loaded at 50% (or more) of its capacity during those 75
hours. Repeated light loads during break-in period may
improperly seat the piston rings, resulting in blowby and high
oil consumption.
• Check oil level frequently during the break-in period. Add
oil if needed. It is natural for the generator engine to con­
sume more oil than is normal until the piston rings have
seated properly.
• When the 25 hour break-in period is done, complete the
tasks recommended under 25 HOUR CHECK-UP PERIOD.
25 HOUR CHECK-UP PERIOD
After the first 25 hours of operation have been completed, con­
tact an Authorized Service Facility for the following
maintenance. The Owner/Operator is responsible for any
changes.
• Change engine crankcase oil and oil filter.
• Check all cooling system ventilation openings on the vehi­
cle.
• Check engine ignition system.
• Inspect the entire electrical system.
• Inspect the engine exhaust system.
AHENTION REQUIRED AFTER
SUBMERSION
if the generator has been submerged in water, it must NOT
be started or operated. Following any submersion in water,
have an authorized Generac Service Facility thoroughly clean
and dry the generator.
EFFECTS OF MOISTURE AND DIRT
Keep the generator set as clean and dry as possible. Protect
unit against excessive dust, dirt, corrosive vapors, road splash,
etc. Permitting dirt and moisture to accumulate on generator
windings will have an adverse effect on the insulation resis­
tance of those windings.
When moisture is allowed to remain in contact with windings,
some of the moisture will be retained in voids and cracks in
the insulation. This causes a reduced insulation resistance and
will eventually cause problems. Dirt will make the problem
worse, since dirt tends to hold moisture in contact with wind­
ings. Salt (as from sea air) will also worsen the problem since
it tends to absorb moisture from the air. Salt and moisture, when
combined, form a good electrical conductor.
AUTOMATIC LOW OIL PRESSURE
SHUTDOWN
The engine is equipped with a normally-closed (N.C.) oil pres­
sure switch (Figure 5). Engine oil pressure holds the switch
open during cranking and operation. Should oil pressure drop
below about 8-10 psi, the switch contacts close and the engine
automatically shuts down.
I n d u s t r i a l M o b i l e G e n e r a t o r
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