for combustion air temperatures significantly below
0 degrees C (32 degrees F). Consult manufacturers
for availability in the application size range.
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The manufacturer shall provide one or more of other following methods to
assist engine starting.
2.11.5.1
Glow Plugs
Glow plugs shall be designed to provide sufficient heat for combustion of
fuel within the cylinders to guarantee starting at an ambient temperature
of -32 degrees C -25 degrees F.
2.11.5.2
Jacket-Coolant Heaters
A thermostatically controlled electric heater shall be mounted in the
engine coolant jacketing to automatically maintain the coolant within plus
or minus 1.7 degrees C 3 degrees F of the control temperature. The heater
shall operate independently of engine operation so that starting times are
minimized. Power for the heaters shall be [_____] volts ac.
a.
Prime Rated Sets
The control temperature shall be the higher of the manufacturer's
recommended temperature or the minimum coolant inlet temperature of the
engine recommended in paragraph SUBMITTALS.
b.
Standby Rated Sets
The control temperature shall be the temperature recommended by the engine
manufacturer to meet the starting time specified at the minimum winter
outdoor temperature.
2.11.5.3
Lubricating-Oil Heaters
A thermostatically controlled electric heater shall be mounted in the
engine lubricating-oil system to automatically maintain the oil temperature
within plus or minus 1.7 degrees C 3 degrees F of the control temperature.
The heater shall operate independently of engine operation so that starting
times are minimized. Power for the heaters shall be [_____] volts ac.
2.11.6
Exerciser
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NOTE: Coordinate the need for an exerciser with the
user. The plant exerciser is required for stand-by
rated sets only, so delete this paragraph for prime
applications. Ensure that the exerciser is
compatible with the automatic transfer scheme (see
reset provisions). It is usually desirable to
utilize system loads for genset exercise loads.
Coordinate requirement with the user. The designer
shall ensure that the design provides warning signs
in areas where the engine generator can start
automatically.
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The exerciser shall be in accordance with Section 16410A AUTOMATIC TRANSFER
SECTION 16263A
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