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DCA-180SSK — PARTS AND OPERATION MANUAL— REV. #3 (06/11/09) — PAGE 27
DCA-180SSK — GENERAL INFORMATION (OPTIONS)
CAUTION :
ALWAYS unplug the jacket water heater
before servicing.
There is a bleed screw on the valve on the engine block.
After service of either the heater or the cooling system, it is
possible to create an air bubble in this area. The air bubble
would prevent hot water created by the jacket water heater
from circulating, if the air bubble were not allowed to escape.
This bleed screw allows for the bleeding process to be
accomplished.
Battery Charger (OPTIONAL)
The battery charger will operate in a ‘BOOST’ mode until
the battery’s current acceptance falls to 70% of the
charger’s rating. The charger will then go into a ‘FLOAT’
mode, where it discharges a lower voltage until an AC
failure, or the battery is discharged.
Fuel Water Separator
The fuel water separator separates water mixed in the
fuel. It has an indicator to let the operator know to drain
the water. See maintenance section for instructions how
to drain water from separator.
Engine
The DCA-180SSK is powered by a 4 cycle, water cooled,
turbocharged KOMATSU Model SA6D108E-2
diesel
gasoline
engine. This engine is designed to meet every performance
requirement for the generator. Reference Table 7, page 25
for engine specifications.
In keeping with MQ Power's policy of constantly improving
its products, the specifications quoted herein are subject to
change without prior notice.
The basic controls and indicators for the DCA-180SSK
generator are addressed on the following pages.
Mechanical Governor System
The mechanical governor system control the RPM of the
engine. When the engine demands increase or decrease,
the mechanical governor system regulates the frequency
variation to ±1.0%. The electronic governor option
increases frequency variation to ±0.25%.
Electronic Governor System
The electronic governor system is made up of two parts, an
electronic controller that monitors frequency variation as the
load increases and decreases and an electronic actuator
that controls the engine throttle. The frequency is regulated
at ±0.25 to help protect sensitive equipment.
Jacket Water Heater (OPTIONAL)
The jacket water heater is a 1500-watt heater designed to
keep the coolant from freezing in the engine block. The
heater is thermostatically controlled and once an acceptable
engine temperature is achieved it will cycle on and off,
operating only about 1/3 of the time. This becomes a very
energy efficient option compared to a direct immersion block
heater. It is designed to keep the engine between 100 and
120 degrees Fahrenheit. This is not a throwaway heater. It
is completely serviceable.
In normal conditions, 20 to 15 minutes is all that is required
to raise the engine temperature of a cold engine to 100
degrees Fahrenheit.