Manual

80
Run Time
The auxiliary fuel p ump will switch on if the engine exceeds the engine sp eed and/or
the load bar set above. It will then stay on, even after speed and load have dropped
below their resp ective limits, for a period of time sp ecified by Run Time. A minimum
Run Time of 5 seconds is permitted.
The Auxiliary Fuel Pump will p rime with the main fuel pump , but will only run if the engine
condition exceeds either limit. Since there may be a short delay from the time the fuel pump is
switched on to the time the extra fuel becomes availab le, the Load Bar and Engine Speed
settings above should be set below when that extra fuel is actually needed. The use of a good
quality check valve and fuel p ump will reduce the delay time by maintaining p ressure in the
secondary line. Nevertheless, the extra fuel will not be instantly available and car e should
taken when decidin g the switch times. If these values are set too high, the engine may be
momentarily starved of fuel when there is a sudden fuel demand.
Figure 16.9. Ex ample circuit for Aux iliary Fuel Pump.
16.10 Anti-Stall Solenoid Control (AS)
A solenoid air v alve in the manifo ld may be used to allow extra air into the engine during
cranking or extremely low rp m. This can aid in starting the en gin e, or in preventing it from
stalling if en gin e revs drop too low.
To use this function, you will need the following:
- a suitable solenoid air valve mounted to the manifold;
- F10 programmin g software and cab le.
If the solenoid air valve is too lar ge, the engine may stall because of its opening. The valve
should be of appropriate size to increase the idle speed by several hundred rpm. Wire the
solenoid through the outp ut connector. Run the F10 p rogrammin g software in ONLINE mod e
and select the Anti-Stall function on the appropriate output.
There is only one parameter to be set with this function. That is the rpm below which the
valve will be opened. The default setting for this parameter is 500rpm.