Fuel Balancing - Eclipse 500 System Manual

Section 7. Fuel

7.5.15 Fuel Balancing

Fuel can be fed from either wing to the opposite engine via the crossfeed valve.
When a fuel imbalance of 50 pounds between the wings is detected, the crossfeed
valve automatically opens, the electric fuel pump on the heavy side automatically
starts, and a FUEL AUTO XFEED L←R or FUEL AUTO XFEED L→R status
message appears.
Since the electric fuel pumps operate at a higher pressure than the ejector boost
pumps, fuel from the heavy wing will flow to both engines. When the quantity
difference is within 10 pounds, the crossfeed valve closes and the electric fuel pump
is switched off. The rate at which an imbalance is corrected depends on engine fuel
burn. Normally a lateral imbalance will be corrected within 10 minutes.
In the event of an engine failure, the automatic balance system keeps the fuel load
balanced while ensuring that the remaining usable fuel is available to the operating
engine.
If the auto crossfeed system is not automatically activated, fuel can be manually
balanced using the XFEED line select key on the fuel synoptic. Activating manual
fuel XFEED causes a FUEL MAN XFEED L R or FUEL MAN XFEED L R status
message to appear.
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Copyright © — Eclipse Aviation Corporation
Eclipse 5OO Systems Manual
Version 2.0 April 2007