Maintenance of Major Components
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One of two methods of operation for the DWC-2000 may now be selected
Method 1 :
Start the engine and accelerate directly to the operating speed(Gen Sets, etc.).
Remove the connection between Terminals M & G. Start the engine and adjust the
SPEED RAMPING for the least smoke on acceleration from idle to rated speed. If the
starting smoke is excessive, the STARTING FUEL may need to be adjusted slightly
CCW. If the starting time is too long, the STARTING FUEL may need to be adjusted
slightly CW
Method 2 :
Start the engine and control at an idle speed for a period of time prior to accelerating to
the operating speed. This method separates the starting process so that each may be
optimized for the lowest smoke emissions.
Replace the connection between Terminals M & G with a switch, usually an oil pressure
switch. Start the engine. If the starting smoke is excessive, the STARTING FUEL may
need to be adjusted slightly CCW. If the starting time is too long, the STARTING FUEL
may need to be adjusted slightly CW.
When the switch opens, adjust the SPEED RAMPING for the least amount of smoke
when accelerating from idle speed to rated speed.
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Idle speed setting
If the IDLE speed setting was not adjusted as detailed in “Starting Fuel Adjustment” section, then
place the optional external selector switch in the IDLE position. The idle speed set point is increased
by clockwise rotation of the IDLE adjustment control. When the engine is at idle speed, the speed
control unit applies droop to the governor system to insure stable operation.
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Speed droop operation
Droop is typically used for the paralleling
of engine driven generators.
Place the optional external selector
switch in the DROOP position, DROOP
is increased by clockwise rotation of the
DROOP adjustment control. When in
droop operation, the engine speed will
decrease as engine load increases.
The percentage of droop is based on the
actuator current change from engine no
load to full load. A wide range of droop is
available with the internal control. Droop
level requirements above 10 % are
unusual.
If droop levels experienced are higher or lower than those required, contact the factory for
assistance.
After the droop level has been adjusted, the rated engine speed setting may need to be reset. Check
the engine speed and adjust the speed setting accordingly.
EC8OM009
SPEED
TIME
Set speed
No load
Load up
Full load
Adjust the DROOP adjustment
DROOP width
(Below 10% of the set-speed)
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