VT80BL Instruction Manual
Page 13
JETS MUNT S.L
Priming the fuel system:
Fuel line need purging of all air after initial installation. Take extra care when priming them,
ensure fuel is primed only up 5cm before to reach the engine; too much fuel inside engine
will cause excessive flaming during start sequence.
Priming is achieved by a special menu on the ecu. Set the trim to low and go to “Info”
menus and next to “Pump test”. Click on “on” /”off” to start/stop the pump manually. Please
observe fuel line to engine very carefully and push the off button to shutoff as soon as fuel
reaches engine..
IMPORTANT: The prime procedure should be done only to fill the fuel tube and filter
in the case of a first installation or in case of disassembling of the tubes. Do not run
the prime function so that the engine becomes flooded by fuel, as this will cause an
uncontrolled fire at next startup.
Starting the engine
Set the throttle stick down and the trim up. “Idle” - Confirm that the LED in the ecu is
blinking in a sequence of 2 blinks and the screen shows "Ready" - !Ready to start!.
Move the stick to full throttle and then back to idle again. The Ecu will begin the startup
sequence as described below:
First the internal glow plug will be energized. After 3 seconds, the starter will be powered
up to have the rotor turning at slow speed (2000- 3000 RPM).
Once the rotor is at speed, the pump and solenoid valves will be energized in pulsating
mode. Few seconds later the kerosene will ignite and the exhaust temperature will begin to
increase. The rpm and pump power will increase automatically. During this phase the data
terminal will display “IGNITION”. When the ignition is detected, the data terminal reading will
change to “Preheat”, during this phase the fuel will be routed to main injectors and the speed
of the rotor will be progressively increased to 12,000 RPM.
Once this phase is finished, the reading will be “FUEL RAMP”. In this phase the engine
receives fuel only trough its normal fuel input and internal glow plug will be disconnected.
The fuel flow and starter power will be increased automatically to increase the RPM up to
idle RPM. Before arriving to idle the Ecu will automatically disconnect power to the starter.
When the rotor speed reaches idle, the screen will change to “running” and the engine speed
is stabilized.
The engine is running!
Control of engine power/rpm is now handed back to the transmitter and controlled by the
position of the throttle stick. Increase/decrease the throttle slowly, verifying that the
engine accelerates/decelerates. Take special care around the engine intake; keep your
hands at a safe distance along with any other objects as they can be easily ingested.
Engine shut down procedure:
To shut down the engine lower the trim and the stick. Is recommendable that before
shutting down the engine please restrain the model then raise the throttle stick to
approximately 25%, allowing temperatures to stabilize for around 5 seconds before carrying
out the shutdown procedure.
