INSTALLATION
8
December 2016 / W-SQ20 / EN
2.5.1
Fuel supply
1
FUEL TANK
Fuel tanks should be made of appropriate material such as
(stainless) steel or plastic. Steel tanks should not be
galvanised or painted inside. Condensation can occur in
metal tanks when temperature changes. Therefore, water
accumulates at the bottom of the tank and provisions
should be made for the drainage of this water.
The tank will need a filling connection, a return connection
and an air ventilation connection which will require
protection against water entry.
Some official regulations do not allow connection points at
the base of the fuel tank; connections are to be made at
the top of the tank with internal tubing down to a few cm
above the bottom of the tank. Using the existing fuel tank
of the car-engine the fitting should be carried out with extra
care. Both a supply line and a return line should be
installed and go into the tank from the top. Interference of
the two systems (car engine and generator engine) should
be avoided.
Do NOT connect the fuel lines to the lines of
the vehicles engine fuel supply.
Driving the tank empty below the level of the
suction pipe of the generator could make it
necessary to bleed the fuel system.
2
FUEL LIFT PUMP
The generating set itself is equipped with a fuel lift pump.
Therefore, the tank can be installed at a lower level than
the generating set. See figure 8. The maximum suction
height is 1 m. The W-SQ20 has a mechanical fuel lift
pump that should be primed manually when the first time
used.
If the pump has to lift the fuel higher than one meter an
external fuel lift pump must be installed. (Art. No.
50201060) The control board is already prepared to
connect an extra fuel pump. When using a second electric
fuel supply pump, it is recommended to mount a loose
supplied pump close to the tank and mount it in an angle
or vertical to prevent air bubbles to block the system. The
pump will become quite hot and should be mounted out of
touch. (Refer to figure 9) The pump makes clicking noises
and therefore could be mounted on rubber mountings.
When the clicking noises of the pump are not acceptable
another noiseless pump is available as an option. (Art. No.
50202200)
Figure 7: Fuel supply (fuel tank is above the generating set)
1 Fuel return
2 Fuel supply
3 Prefilter / Water separator (optional)
5 Fuel Tank
