Fuel Supply - Whisper Power M-SQ25 Installation Manual

1.5.1

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; in this instance 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.
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. The maximum suction height is 1 m.
If the pump has to lift the fuel higher than one meter an
external electrical fuel lift pump must be installed. The
control board is already prepared to connect an extra fuel
pump.
Fig. 3 Fuel supply
1 Fuel return
2 Fuel supply
3 Prefilter / Water separator (optional)
5 Fuel Tank
EN / M-SQ25 / Oktober 2010
3 FUEL PIPES
When the tank is above the generating set we recommend
ending the return line on the top of the tank.
When the return is on the top - in case of a leakage the
return line cannot overflow because of siphoning. One will
only need a fuel cock in the fuel supply line (see figure 3).
When the tank is below the generating set we recommend
ending the return line on the bottom of the tank (A) below
the inlet of the supply line (see figure 4)
INSTALLATION
5