z 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.
z 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. z Speed droop operation Droop is typically used for the paralleling of engine driven generators.
Adjust the DROOP adjustment Place the optional external selector switch in the DROOP position, DROOP SPEED No load Load up is increased by clockwise rotation of the Set speed DROOP width (Below 10% of the set-speed) DROOP adjustment control. When in Full load droop operation, the engine speed will decrease as engine load increases. The percentage of droop is based on the TIME actuator current change from engine no EC8OM009 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. Maintenance of Major Components - 112 -