Pneumax 120-60-DS, Руководство по установке

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Pneumax CAFS "DS" Series Installation Guide
Page 10 of 40
Fuel injection motors require a closed loop full of fuel (in lines and tank) from the tank to the
injector and back. The motor is provided with an excess of fuel, and the unused fuel flows
back to the tank. This ensures a continual supply of fuel at the injector. The return line
must end 1/2 inch
below the supply line to prevent air entering the fuel loop between the
tank and auxiliary engine.
Comments Installation technique
Return Supply
Filler neck with tank
ventilation
12 inch minimum
recommended
½ inch
Recommended for shared tank
If the auxiliary motor will draw fuel from the
tank used by the motor that moves the truck
(the chassis tank), NFPA standards specify
that the auxiliary motor
must not be able to
draw more than 75% of the fuel from the
tank.
This minimizes the chances of running out
of fuel and being unable to move the vehicle
out of a dangerous situation.
Return
Supply
Filler neck with tank
ventilation
6 inch minimum
recommended
½ inch
Alternate
Fuel Line
Alternate fuel supply and return line
layout for shared tank
If the fuel pickup for the auxiliary engine
goes to the bottom of the tank, as shown
here, the auxiliary engine can use almost all
of the fuel from the tank.
The best practice is for the supply line
opening to be 1.5 inches above the bottom
of the tank, to avoid drawing sludge or water
into the line, with the return line ending 0.5
inch below the supply line opening.
A2
Return Supply
Recommended for separate auxiliary tank.
NOT Recommended for shared tanks.