Generac Power Systems 004812-3, Owner'S Manual

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Section 1 – General Information
Standby Generator Sets
1.3.6 OVERCRANK SHUTDOWN
After a prespecified duration of cranking, this func-
tion ends the cranking if the engine has failed
to start.
1.3.7 RPM SENSOR LOSS SHUTDOWN
If the speed signal to the control panel is lost, engine
shutdown will occur.
1.4 DC FUSE
This fuse is located on the front panel of the control
system. It protects the panel wiring and components
from damaging overload. Always remove this fuse
before commencing work on the generator. The unit
will not start or crank if the fuse is blown. Replace the
fuse with one of the same size, type, and rating. The
manufacturer uses an AGC fuse rated at 15 amps.
1.5 FUEL SYSTEM
1.5.1 FUEL REQUIREMENTS
NOTE:
It is the responsibility of the installer to make sure
that only the correct recommended fuel is sup-
plied to the generator fuel system. Thereafter, the
owner/operator must make certain that only the
proper fuel is supplied.
For further information on the various types of
fuel systems, refer to Engine-Generator Standby
Electric Power Systems Installer’s Guide and
Reference Manual (part #046622).
1.5.2 DIESEL FUEL SYSTEM
Diesel fuel is supplied to the generator set from a
base-mounted fuel tank.
Diesel fuels are less volatile than gaseous fuels, how-
ever, careless installation can lead to safety hazards
and/or serious problems with engine/generator per-
formance and reliability.
NOTE:
Appropriate care should be taken in applications
where extremely low ambient temperatures are
possible to ensure the temperature of the diesel
fuel is not allowed to fall below levels where “gell-
ing” could occur.
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1.6 SPECIFICATIONS
1.6.1 GENERATOR
Refer to the data label on the particular generator for
rated watts, amperes, frequency, voltage, phase and
other pertinent information.
1.6.2 ENGINE
General:
Cylinders and Arrangement ....................................................... 4 in-line
Displacement .................................................................. 3.9 L (238 in
3
)
Bore ........................................................................... 104 mm (4.09 in.)
Stroke ........................................................................ 115 mm (4.52 in.)
Compression Ratio .................................................................. 16.5-to-1
Number of Main Bearings ....................................................................5
Type of Main Bearing Caps ..................................................... Cast Iron
Aspiration ............................................ Turbocharged, Aftercooled (T/A)
Governed Engine Speed ........................................................ 1800 rpm
Type of Valve Lifters .......................................................................Solid
Cylinder Head ........................................ Cast Iron with Overhead Valve
Pistons ......................................................................4 - Aluminum Alloy
Crankshaft .....................................................................Hardened Steel
Number of Flywheel Teeth ................................................................109
Engine Lubrication System:
Type of Oil Pump ................................................................ Gear Driven
Oil Filter .................................................................. Full Flow, Cartridge
Crankcase Oil Capacity ..........................................18 L (4.75 U.S. gal.)
Fuel System:
Type of Fuel ................................................ #2D Fuel (Min Cetane #40)
Consumption:*
Rated 25% 50% 75% 100%
Freq. Load Load Load Load
60 Hertz 1.07 2.15 3.22 4.3
*Given in: gal/h
Cooling System:
Type ....................................................... Pressurized, Closed Recovery
Coolant Capacity
System .............................................................15.9 L (4.2 U.S. gals.)
Engine ................................................................6.4 L (1.7 U.S. gals.)
Coolant Flow Per Minute .......................................128 L (34 U.S. gals.)
Heat Rejection to Coolant ............................................... 170,900 Btu/h
Cooling Fan ........................................................................Pusher Type
Diameter of Fan ............................................................ 457 mm (18 in.)
Cooling Airflow Required ........................................................7,200 cfm
Recommended Coolant ............................ See “Coolant”, Section 1.6.4
Combustion Airflow Required ....................................................209 cfm
Exhaust System:
Exhaust Flow at Rated Output ..................................................549 cfm
Exhaust Outlet Size ...................................................................... 3.0 in.
Exhaust Temperature at Rated Output ......................... (524° C) 975° F
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