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ERJ 175 Fuel System
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ERJ-175
FUEL SYSTEM
TANKS
2 integral fuel tanks, each divided into a surge, main and collector tank, interconnected by a crossfeed valve
RIGHT TANK
1 Ejector Pump
1 AC Fuel Pump (AC ESS BUS)
1 DC Pump (DC ESS BUS 2)
3 Scavenge pumps
LEFT TANK
1 Ejector Pump
1 AC Fuel Pump (AC BUS 1)
3 Scavenge pumps
TANKS
Ejector Pumps - Primary - Motive flow- Transfers fuel from Collector to engine
AC Fuel Pumps - Backup to Ejector - Can supply fuel to both engines from single tank during crossfeed
Scavenge Pumps - 3 in each main tank - Maintain fuel level in collector tank
DC Fuel Pump- Provides pressurized fuel for normal APU operation and engine start
DISTRIBUTION
From the fuel truck - The ERJ 175 can be fueled at the refueling/defueling control panel under the right wing if the aircraft has AC or battery power (Hot Batt Bus) OR by using gravity refueling ports located on the top of each wing. Quantity can be checked by referencing the EICAS or magnetic level indicators located under each wing.
*cannot achieve max fuel by pressure refueling alone, must top tanks off by gravity refueling*
DISTRIBUTION
Engine and APU start - AC fuel pumps are used to supply fuel to engines during engine start. A DC Fuel Pump can be used to supply fuel to the APU or engine 2 during start without AC Power.
Tank to engine - Fuel is transferred from the main tank to the collector tank by scavenge pumps. Using motive flow, Ejector pumps move fuel from the collector to the engine.
INDICATIONS
EICAS - Displays Fuel flow per engine, fuel quantity per engine, and total fuel quantity.
Individual Fuel Tank low
INDICATION
Amber at or below 1320
Red Below 660
Total Fuel Low
Amber at or below 2640
Red below 1320