Installation and adjustament manual
6/36
DESCRIPTION
3.1 Regulator-vaporizer
The Regulator-vaporizer (RV) (Fig. 3.1) has two stages
for pressure reduction and control and is provided with
water-gas heat exchanger, filter, fuel lock-off, gas tem-
perature sensor, and safety valve.
The output pressure is 0.95 bar (95 kPa) higher than the
pressure existing in the intake manifold.
Legenda:
A) Fuel inlet
B) Fuel lock-off
C) Fuel outlet
D) Bracket mounting points (M6)
E) Compensation inlet
3.2 Proportioner
The Proportioner (P) (Fig. 3.2) includes two step- motors
which sequentially drive two valves. The first step-
operates at idle and low RPM conditions, the second
handles the gas output at medium-high engine power
output and during acceleration.
An electrovalve is positioned at the inlet of the
Proportioner to perform the fuel cut-off function during
deceleration. The diagnostic plug to read the system’s
working pressure is present on the cut-off valve.
Legenda
A) Fuel inlet
B) Fuel outlet
C) Solenoid valve
D) Cut-off electrovalve
E) Idle/low power step-motor
F)
Medium/high power step- motor
G) Diagnostic plug to read the system’s working
Fig.3.1
F)
Water outlet
G) Water inlet
H) Temperature sensor
I)
Safety valve
L) Second stage pressure setting screw
M) Drain taps
Main data :
First stage working pressure ............. 1.6 bar (160 kPa)
Second stage-working pressure ........ 0.95 bar (95 kPa)
Nominal operating output ............................. 40 Nm3/h
Operational temperature ............................. -20/+120 C
Setting of safety valve pressure ...... 3.5 bars (350 kPa)
pressure
H) Bracket holes (M6)
I)
Drain tap
L) Water inlet
M) Water outlet
Main data
Test Pressure ...................................... 1.6 bar (160kPa)
Working Pressure ............................. 0.95 bar (95 kPa)
Step motor data
Operating Voltage ................................................. 12V
Power Absorption ............................................ 150 mA
Nominal Power ....................................................... 2W
Operational Temperature ............................ -20/+120 C
Protection against Dust and Water ....................... IP54
Solenoid valve data
Operating Voltage ................................................. 12V
Internal Resistance ...................................... 26-30 Ohm
Operational Temperature ............................ -20/+120 C
