Hub location
Site the Hub unit in a location away from direct exhaust or sunlight heating as otherwise its ambient
sensors will tell the ECU it is a hot day and moderate settings appropriately.
The Hub communicates via digital link to the ECU, there are no analogue signals used. The Hub has a
printed panel showing where each cable goes and the orientation of each plug. For all cables, if you
need a longer or shorter version than supplied, please contact Xicoy. Do not cut or splice in extra wire. If
you are using the full colour plug-in display this is also plugged in here. The gearbox rpm sensor is also
plugged in here.
The ECU battery should be connected directly to the Hub, no switches, electronic regulators, diodes etc.
Multiple battery operation using “Y” lead is possible but at least one battery must be directly connected.
Auto battery recognition
A new addition is automatic detection and accommodation for 7.4v LiPo (recommended) and 9.9v 3-cell
LiFe batteries. The ECU detects the battery voltage at plug in, and automatically adjusts the functions to
make use of the additional voltage available.
Fuel Pump
As mentioned previously, the fuel pump has been specially designed for this
application and is unique in many ways. It is extremely small in size and weight but
is much more sophisticated than its looks suggest. There is not the usual fixed
cable with socket but a small plug built into the pump which enables a regular high
quality JR type servo cable to be used as the pump cable (socket at both ends).
This way its easy to get just the right length you need without cutting or extending
the wire.
Note: the three wires are NOT for the 3phases usually used for a brushless motor. The three wires are
for the plus and minus power supply, and a single wire bidirectional digital link.
Construction
A solid aluminium housing encloses the motor and pump elements. A pair of nipples
provide a secure connection for 4mm piping at inlet and outlet. Two tapped M3 holes in the body provide
a secure mounting location for a neat and tidy installation. Never disassemble the pump, it has an
extremely delicate internal structure and you will void its warranty.
Operation
The difference between this pump and most other turbine pumps is that it also has its own
tiny brushless 3-phase driver included within the pump housing. The motor is not a slave to an external
driver or an open loop dc motor driven by an external voltage, but has its own sophisticated controller
and driver built in.
The controller communicates with the ECU via the Hub many thousands of times a second. The ECU
sends out a rpm request to the pump and receives actual rpm information and therefore flow rate return
signals back, and this process is updated continuously at high speed.
Please note, you must not try to run the pump by plugging this 3-wire cable into any brushless (3-phase)
driver, the controller will be immediately destroyed.
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