5.1.5. Application and installation information z The speed control unit is rugged enough for mounting in a control cabinet or engine mounted enclosure or in a remote console up to 20 meters(65 ft.) from the engine. Care should be taken to insure that the speed control unit, mount it vertically so that condensation will not accumulate in the speed control unit. WARNING : An overspeed shutdown device, independent of the governor system, should be provided to prevent loss of engine control which may cause personal injury or equipment damage. Do not rely exclusively on the governor system electric actuator to prevent over speed. A Secondary shutoff device, such as a fuel solenoid must be used.
5.1.6. Wiring z Wiring to the speed control unit should be as shown in Diagram 1. Wire leads to the battery and actuator from the speed control unit terminals A, B, E and F should be #16 AWG(1.3 mm sq.) or larger. Long cables require an increased wire size to minimize voltage drops. An external 15 amp fuse is recommended in series with terminal F, the positive (+) battery input terminal. z The magnetic speed sensor leads must be twisted and/or shielded for their entire length. If shielded cables are used, connect all the shields to terminal D only.
The shield should be insulated to insure no other part of the shield comes in contact with engine ground, otherwise stray speed signals may be introduced to the speed control unit. With the engine stopped, adjust the gap between the magnetic speed sensor and the ring gear teeth. The gap should not be any smaller than 0.020 in (0.45 mm). Usually, gear tooth will achieve a satisfactory air gap. The magnetic speed sensor voltage should be at least 1 VAC RMS during cranking. 5.1.7. Adjustments z Before starting engine Confirm the following adjustment positions. The adjustments are factory pre-set as follows :
Check to insure the GAIN and STABILITY adjustments, and if applied, the external SPEED TRIM CONTROL are set to mid position. z Preset the DWC-2000 as follows : Gain.............................................................................................................................Minimum CCW Stability................................................................................................................................Mid-range Speed adjust ........................................................................................................................
3,650 Hz Idle ........................................................................................................................................1,950 Hz Droop ........................................................................................... Maximum CCW (Minimum setting) Over speed .................................................................................................................. Maximum CW Run ramp ..................................................................................................................... Maximum CW Crank ramp ..................................................................................................................
Maximum CW Starting fuel .................................................................................................. Full CW (Maximum fuel) Speed ramping.................................................................................................... Full CCW (Fastest ) Maintenance of Major Components - 110 -