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ESD5500-II Fusion Series Speed Control Unit 1-2020-A4 PIB2180
10
OPERATION
11
ADJUSTING FOR GAIN AND STABILITY
One of two methods of operation for the ESD5500-II may be now selected.
•
Method 1: Start the engine and accelerate directly to the operating speed (Generator Sets, etc.).
•
Method 2: Start the engine and maintain 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.
Once the engine is running at operating speed and at no load, the following governor performance adjustments can be made to increase
engine stability.
STaBILITY aDJUSTmenT
ParameTer
ProceDUre
A.
Gain
1. Rotate the Gain adjustment clockwise until instability devel-
ops.
2. Then, gradually move the adjustment counterclockwise until
stability returns.
3. Move the adjustment one division further counterclockwise to
ensure stable performance (270° potentiometer).
4. If instability persists, adjust the next parameter.
B.
Stability
Follow the same adjustment procedure, steps 1 - 3, as the Gain
parameter.
Gain
Stability
Start
Fuel
Speed/Fuel
Ramp
Start the engine and accelerate directly to the operating speed
meTHoD 1
ProceDUre
1.
Remove the connection between Terminals M and G.
2.
Start the engine and adjust the Speed/Fuel Ramp for the least smoke during
acceleration to rated speed and to prevent overshoot
3.
If the starting smoke is excessive, adjust the Start Fuel slightly CCW.
4.
If the starting time is too long, adjust the Start Fuel slightly CW.
Start the engine and maintain at an idle speed for a period of time prior to accelerating to the operating speed.
meTHoD 2
ProceDUre
1. Replace the connection between Terminals M and G with a switch, usually an
oil pressure switch or toggle switch.
2. Start the engine.
3. If the starting smoke is excessive, the Start Fuel may need to be adjusted
slightly CCW.
4. If the starting time is too long, the Starting Fuel may need to be adjusted
slightly CW.
5. When the switch opens, adjust the Speed Ramping for the least amount
of smoke when accelerating from idle speed to rated speed or to prevent
overshoot.
Idle speed must be set below operating speed.
noTe
Normally, adjustments made at no load achieve
satisfactory performance. If further performance im-
provements are required, refer to Section 11, SYS-
TEM TROUBLESHOOTING.
noTe
