INSTALLATION
W-GV/2, W-GV/3, W-GV 8 and W-GV 10 —
March
2015 — EN
7
2.7
FUEL SUPPLY
2.7.1
Fuel tank
Fuel tanks should be made of appropriate material such as
(stainless) steel or plastic. Steel tanks should not be galvanized
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. When using the existing fuel tank of the car
engine, 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 genverter engine) should be avoided. Driving the tank
empty below the level of the suction pipe of the genverter
could make it necessary to bleed the fuel system.
Figure 7: Fuel tank below the genverter
Figure 8: Fuel tank above the genverter
2.7.2
Fuel lift pump
The three-cylinder genverter has a built-in fuel lift pump;
therefore the tank can be installed at a lower level than the
genverter (Figure 7). The maximum suction height is 1 m. If the
pump has to lift the fuel higher than 1 m an external fuel lift
pump must be installed (art. no. 50201062 or 50202200
(noiseless model), as appropriate).
The two-cylinder genverter has an external fuel lift pump. This
should be mounted close to the tank, in an angle or vertically to
prevent air bubbles from blocking the system. As the pump
makes clicking noises, it is recommended to use rubber
mountings. If the clicking noises of the pump are not
acceptable, a noiseless pump is available as an option (Art. no.
50202200).
Figure 9: Fuel line assemblies with pump mounted vertically or
in an angle
2.7.3
Fuel pipes
When the tank is above the genverter (Figure 8) we
recommend ending the return line on the top of the tank.
When the return is on the top, siphoning of the return line is
impossible in case of a leakage. Only the fuel supply line will
need to be fitted with a fuel cock. When the tank is below the
genverter (Figure 7) we recommend ending the return line on
the bottom of the tank below the inlet of the supply line.
Both supply and return fuel pipe lines should be made of
appropriate material and have an 8 mm outer diameter. The
quality of the tubing of fuel pipes may be subject to local
regulations depending on the application of the vehicle.
The fuel pipes can be connected to the flexible hoses which are
on the genverter and are prepared to be fitted to 8 mm pipe.
The resulting fuel line complies with CE standards as well as
ISO 7840 A2.
It is important to avoid bends in the pipes, as they could trap air
bubbles. The return pipe should never be connected to the
suction pipe. The return line should be of 8 mm diameter and
go straight back via the top to the bottom of the tank. When
the return is too narrow, has too many bends and goes back to
the bottom of the fuel tank (i.e. bypassing the top), the back-
pressure may be too high. This results in irregular running of
the engine. When the engine runs irregularly, check if back-
pressure is the problem by disconnecting the return line just
outside the canopy and draining it in a canister. When the
engine runs smooth now, the return piping has to be changed.
It could also help to install a second (electrical 12V) fuel lift
pump in the supply line to increase the pressure.
2.7.4
Fuel filters
A fine fuel filter is installed which requires maintenance.
WhisperPower recommends installing an extra fuel filter/ water
fuel separator near the fuel tank.
Before starting your genverter for the first time
follow the fuel system bleeding procedure in the
user’s manual.
Summary of Contents for W-GV/2
Page 20: ...Ref PM WP GV8 Date 5 8 2016...
