Installation Manual
L 1700, L2000 and L 2400 Series
4, 2, 1 and 3, from the in jec tion noz zles to the pres sure sen sor (S1) and then to the pres sure reg u
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la tor (R2). The un used fuel flows back into the tanks. The elec tric driven pumps, ar ranged in par -
al lel and the sep a ra tor(s) (F3, F4), are to be lo cated at the low est pos si ble po si tion in the fuel
sys tem (Fig. 4-4). The fuel lines uses must be pres sure re sis tant to a de sign pres sure of 3 bar and
to a limit pres sure of min. 6 bar. They must be pro tected with fire re sis tant sleeves. Also the fuel
lines must be chem i cally re sis tant against avi a tion and au to mo tive fuel, al co hol (meth a nol) and
en gine oil.
Item Com po nent Re mark Po si tion
F1-F4 Fuel injection Engine
T1 Tank Airframe/wings
T2 Tank vent
F1, F2 Filter 7.0 um, with replacement and
inspection facility
Firewall / airframe
F3, F4 Water
separator(s)
main fuel/feed auxiliary system if
specified
firewall
F5 Tank Filter Tank
L1 Fuel line Crossover line to cylinder banks Engine
L2 Fuel line Return to fuel pressure regulator Engine to firewall
L3 Fuel line Pressure line from pump(s) Firewall/engine
P1, P2 Fuel pumps electrically driven; main and
auxiliary system
Firewall / airframe
S1 Fuel pressure
sensor
connect between cross-over line
and pressure regulator.
firewall
V1-V3 Shut-off valve(s) main fuel/feed auxiliary and
return lines if specified
Airframe
R2 Pressure
regulator
connect manifold pressure,
cross-over and return line
firewall
4.2 Airfilter
An air fil ter (A) (see Fig.:3-2) should be used to pro tect the en gine from dust and dirt. The air
fil ter duct has been op ti mized for the en gine and should not be changed, be cause the power might
be re duced. The air fil ter must be pro vided with cool air from the out side. An en clo sure for the
air fil ter that is at tached to the cowl ing has proven to be prac ti cal. A drain vent in the air fil ter
enclosure pro vides pro tec tion from wa ter ac cu mu la tion in the cell of the air fil ter. An in ter nal
vane pre vents the in gress of wa ter.
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