GAC ESD-5555 Teknik Bilgiler - Sayfa 4
Kontrol Ünitesi GAC ESD-5555 için çevrimiçi göz atın veya pdf Teknik Bilgiler indirin. GAC ESD-5555 12 sayfaları. Speed control unit
C.
GAIN and STABILITY adjustments may require minor changes after engine load is applied.
Normally, adjustments made at no load achieve satisfactory performance. A strip chart
recorder can be used to further optimize the adjustments.
If instability cannot be corrected or further performance improvements are required, refer below to
the SYSTEM TROUBLESHOOTING section.
Starting Fuel Adjustment
The engine's exhaust smoke at start-up can be minimized by completing the following
adjustments:
A.
Place the engine in idle by connecting Terminals M & G.
B.
Adjust the IDLE speed for as low a speed setting as the application allows.
C.
Adjust the STARTING FUEL CCW until the engine speed begins to fall. Increase the
STARTING FUEL slightly so that the idle speed is returned to the desired level.
D.
Stop the engine.
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.
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. A CW adjustment to the IDLE
adjustment control will increase the idle speed set point. When the engine is at idle speed, the
speed control unit applies droop to the governor system to insure stable operation.
Technical Information
or
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.