INSTALLATION
12 Copyright © 2009 Mastervolt / May 2009 / Whisper 6/8/12/16 Ultra for mobile applications / 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 12. The maximum suction
height is 1 m. The Whisper 16 ULTRA 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. 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 fig. 13)
The pump makes clicking noises and therefore could be
mounted on rubber mountings. When the clicking noises of
the pump are not acceptable an other noiseless pump is
available as an option
Fig. 11 Fuel supply (fuel tank is above the generating set)
1 Fuel return
2 Fuel supply
3 Prefilter / Water separator (optional)
5 Fuel Tank
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