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12 Generac
®
Power Systems, Inc.
When using maintenance-free batteries, it is not
necessary to check the specific gravity or electrolyte
level. Have these procedures performed at the
intervals specified in Section 4, “Maintenance.” A
negative ground system is used. Battery connections
are shown on the wiring diagrams. Make sure all
batteries are correctly connected and terminals are
tight. Observe battery polarity when connecting
batteries to the generator set.
NOTE:
Damage will result if the battery connections are
made in reverse.
2.11 PREPARATION BEFORE START-UP
The instructions in this section assume that the
standby generator has been properly installed,
serviced, tested, adjusted and otherwise prepared for
use by a competent, qualified installation contractor.
Be sure to read the “Safety Rules” on Pages 2 and 3,
as well as all other safety information in this manual,
before attempting to operate this (and related)
equipment.
2.11.1 PRIOR TO INITIAL START-UP
Prior to initially starting the generator, it must
be properly prepared for use. Any attempt to
crank or start the engine before it has been
properly serviced with the recommended types
and quantities of engine fluids (oil, coolant,
fuel, etc.) may result in an engine failure.
Before starting the generator for the first time, the
installer must complete the following procedures. For
follow-up maintenance information and/or service
intervals, please refer to Section 4, “Maintenance.”
2.11.2 TRANSFER SWITCH
If this generator is used to supply power to any
electrical system normally powered by an electric
utility, the National Electrical Code requires that a
transfer switch be installed. The transfer switch
prevents electrical backfeed between two different
electrical systems. (For additional information, see
the applicable transfer switch manual for this unit.)
The transfer switch, as well as the generator and
other standby components, must be properly located
and mounted in strict compliance with applicable
codes, standards and regulations.
2.11.3 FUEL SYSTEM
Make sure the fuel supply system to the generator (a)
delivers the correct fuel at the correct pressure and
(b) is properly purged and leak tested according to
code. No fuel leakage is permitted. See Section 1.10,
“Specifications” for more information.
2.11.4 GENERATOR SET LUBRICATION
Check the engine crankcase oil level before operating
and, if necessary, add oil to the proper level – the
dipstick “FULL” mark. Never operate the engine with
the oil level below the dipstick “ADD” mark. See
Section 1.10, “Specifications” and Section 1.14,
“Engine Oil Recommendations”.
NOTE:
This engine is shipped from the manufacturer
with 15W-40 oil. This oil should be changed after
30 hours of operation.
2.11.5 ENGINE COOLANT
Have the engine cooling system properly filled with
the recommended coolant mixture. Check the system
for leaks and other problems. See Section 1.10,
“Specifications” and “Recommended Coolant”.
2.11.6 BELT TENSION
Check the engine fan belt tension and condition prior
to placing the unit into service and at recommended
intervals. Belt tension is correct when a force of
approximately 22 pounds (10 kg), applied midway
between pulleys, deflects the belt about 3/8- to 5/8-
inch (10 to 16 mm).
2.11.7 ELECTRICAL SYSTEM
Make sure the generator is properly connected to an
approved earth ground and/or ground rod.
Make sure the generator battery is fully charged,
properly installed and interconnected, and ready for
use.
Check to ensure that there are no loose electrical
connections. Restrain any loose wires to keep them
clear of any moving generator set components.
!
Section 2 — Installation
Centurion Liquid-cooled 15 kW and 25 kW Generators