run/start (manual), off/reset, and automatic mode. Start-stop logic shall
be provided for adjustable cycle cranking and cool down operation. The
logic shall be arranged for [manual starting] [and] [fully automatic
starting in accordance with paragraph AUTOMATIC ENGINE-GENERATOR SET SYSTEM
OPERATION]. Electrical starting systems shall be provided with an
adjustable cranking limit device to limit cranking periods from 1 second up
to the maximum duration.
2.10.2
Capacity
The starting system shall be of sufficient capacity, at the maximum
[outdoor][indoor] summer temperature specified to crank the engine without
damage or overheating. The system shall be capable of providing a minimum
of three cranking periods with 15-second intervals between cranks. Each
cranking period shall have a maximum duration of 15 seconds.
2.10.3
Functional Requirements
Starting system shall be manufacturers recommended dc system utilizing a
negative circuit ground. Starting motors shall be in accordance with SAE
ARP892.
2.10.4
Battery
**************************************************************************
NOTE: Select nickel-cadmium when the battery
temperature cannot be maintained above minus 6
degrees C (22 degrees F).
**************************************************************************
A starting battery system shall be provided and shall include the battery,
battery rack, intercell connectors, and spacers. The battery shall be in
accordance with SAE J537. Critical system components (rack, protection,
etc.) shall be sized to withstand the seismic acceleration forces
specified. The battery shall be [lead-acid][nickel-cadmium] type, with
sufficient capacity, at the minimum [outdoor][indoor] winter temperature
specified to provide the specified cranking periods. Valve-regulated
lead-acid batteries are not acceptable.
2.10.5
Battery Charger
A current-limiting battery charger, conforming to UL 1236, shall be
provided and shall automatically recharge the batteries. The charger shall
be capable of an equalize charging rate for recharging fully depleted
batteries within [24][_____] hours and a float charge rate for maintaining
the batteries in prime starting condition. An ammeter shall be provided to
indicate charging rate. A timer shall be provided for the equalize
charging rate setting. A battery is considered to be fully depleted when
the output voltage falls to a value which will not operate the engine
generator set and its components.
2.10.6
Starting Aids
**************************************************************************
NOTE: Jacket coolant heaters are normally provided
for most applications to aid starting. Some
manufacturers may require glow plugs for combustion
air temperatures significantly below 0 degrees C (32
degrees F); however, use if these alone do not
SECTION 16264A
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