Fuel pump adjustment
After the turbine has ignited on propane, the starter motor further accelerates the
turbine. At approx. 5000 RPM, the fuel pump is automatically started at minimum power
by the ECU. Beginning from this first pump start voltage, the fuel flow is then slowly
increased by increasing the pump voltage.
The initial pump voltage that the pump is supplied immediately after ignition has been
factory adjusted. If the fuel pump is changed or after several turbine runs the pump is
braking in thus delivering too much fuel at start-up causing long flames behind the
turbine exhaust, it might be necessary to readjust the pump start voltage.
For adjustment of the pump start voltage, the ECU incorporates a special adjustment
function, which can be accessed as follows:
Interrupt fuel supply to the turbine. If the fuel supply to the turbine is not disconnected /
interrupted the turbine can be “filled” with fuel during the following adjustment
procedure!!!
Æ
Danger of a “Hot Start”
Switch off ECU and plug in GSU (RC transmitter is not being used)
Press and hold the key “Change Value/Item” on the GSU and switch on the ECU
Release the “Change Value/Item” when the display of the GSU shows the following:
Pump start volt.
Uaccelr1:
By pressing the “Run” key will run the pump at the current start voltage value.
To increase the pump start voltage by one increment, press the
►
+ key.
To decrease the pump start voltage by one increment, press the
◄
- key.
The pump start voltage should now be adjusted in such a manner, that the pump just
begins to steadily turn and that the fuel is delivered in a thin fuel stream (a little bit more
than just dripping out of the tubing). To test this, press the “Run” key several times to
check that the pump starts steadily running on different pump rotor positions.
Normal values for the pump start voltage are between 0.100 and 0.325V.
Important:
At the end of the adjustment procedure press the “Manual” key to store the new setting
and resume to normal operation.
New pump setup menu on V5.0K and newer ECUs.
Press and hold the
Limits
key then press the
►
+ key. This will enter the new pump and
NiCad battery cell count menu. To exit, press any blue key.
There are 3 selections available. 1 = U-accelr1, 2 = U-accelr2, 3 = number of NiCad
cells (6-10 selectable).
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