2.9 AUTOMATIC STARTING SYSTEM
2.9.1 Starting Motor – A DC electric starting system with positive
engagement shall be furnished for the generator. The motor
voltage shall be 24 volts.
2.9.2 Automatic Control – Fully automatic engine start-stop controls in
the generator control panel shall be provided. Controls shall
provide shutdown for low oil pressure, high water temperature,
overspeed, overcrank, and loss of engine coolant. Alarms for
approaching high water temperature and impending low oil
pressure shall also be included. Controls shall include a 45-second
single cranking cycle limit with lockout or cyclic crank system with
lockout and overcrank protection.
2.9.3 Batteries – A lead-acid storage battery set of the heavy duty diesel
starting type shall be provided. Battery voltage shall be 24 volts,
and the battery set shall be rated no less than 225 ampere hours.
Necessary cables and clamps shall be provided.
2.9.4 Battery Tray – Battery tray shall be provided for the batteries and
shall conform to NEC 480-7(b). It shall be constructed of fiberglass
and so treated as to be resistant to deterioration by battery
electrolyte. Further, construction shall be such that any spillage or
boil-over of battery electrolyte shall be contained within the tray to
prevent a direct path to ground.
2.9.5 Battery Charger – A current-limiting, automatic 24 volt DC charger
shall be furnished to automatically recharge batteries. Charger
shall float a 2.17 volts per cell and equalize at 2.33 volts per cell. It
shall include overload protection, silicon diode full wave rectifiers,
voltage surge suppressor, DC ammeter, DC voltmeter, and fused
AC input. AC input voltage shall be 120 volts, single phase.
Amperage output shall be no less than ten (10) amperes. Charger
shall be wall mounting type in NEMA 1 enclosure, and U.L. listed as
an industrial control panel. The charger shall be manufactured by
LaMarche per NFPA 110 and U.L. 508. The charger shall be
mounted and wired within the enclosure for the generator set by
enclosure manufacturer.
DIESEL ENGINE DRIVEN GENERATOR WITH WEATHERPROOF ENCLOSURE 472-18
(23 pages)
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