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3
FUEL PIPES
When the tank is above the generating set (figure 7) we recom-
mend 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. When the tank is below the gen-
erating set we recommend ending the return line on the bottom
of the tank (A) below the inlet of the supply line.
Both supply and return fuel pipe lines should be appropriate ma-
terial and 8 mm inner diameter tubing. The quality of the tubing
of fuel pipes could be submitted to local regulations depending
on the application of the vehicle.
The fuel pipes can be plumbed to the flexible hoses which are
on the generating set and have a connection to fit to 8 mm pipe.
This fuel lines fulfils CE standards and are according to 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, the back-pressure could be too high.
This results in irregular running of the engine. When the engine
runs irregular, one can check if back-pressure is the problem by
disconnecting the return line just outside the canopy and drain-
ing 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.
4
FUEL FILTERS
A fine fuel filter is installed which requires maintenance. Whis-
perPower advises to install an extra fuel filter/ water fuel separa-
tor near the fuel tank.
Before starting your generating set for the first time follow the
fuel system bleeding procedure in the User Manual.
2�5�2 RADIATOR COOLING
1
GENERAL INSTRUCTIONS
The radiators can be mounted below the floor, in the side or on
the roof of the vehicle. It is recommended to install the radiator
as close as possible to the unit. The piping should be fitted as
direct as possible.
It is very important to use good quality heat and pressure resis-
tant hose and fittings. Therefore it is strongly recommended to
use WhisperPower installation kits.
W-SQ PRO 15/18 kVA 60 Hz
Figure 10: Ventilating an air trap
Special attention should be paid to the ventilation of the systems.
Each installation system is standard supplied with an expansion
tank for the coolant, which is also used to release air bubbles and
makes it possible to add coolant into the system in an easy way.
This expansion tank should be at the highest point of the system
and mounted as high as possible.
Most cooling problems originate from air traps blocking the circu-
lation of the engine coolant.
For the engine we use a pressurised system. The 12 mm connec-
tion on the top is closed. Wherever the radiators are mounted it
is necessary to bleed the exhaust manifold of the engine. The ex-
haust manifold has a 8 mm connection to ventilate the manifold.
There is an 8 mm high pressure and high temperature resistant
hose in the delivery to connect the hose connection on the side
of the manifold with the expansion tank.
Initially the engine cooling system can be filled via the cap on the
exhaust manifold of the engine. However when the radiator is
above the engine one can only fill the system to the level of the
manifold. Additional filling has to be done via the expansion tank.
For large engine cooling systems with long pipes or for extra
reserve there is an extra large expansion tank with a content of 7
litres and an alarm for low coolant level that can be supplied as
an option (refer to figure 11).
Figure 11: 7 litres optional expansion tank with low level
alarm.
When mounting the radiators it is important to take care that the
outgoing connection, which is the connection to the engine inlet,
is on the top position (refer to figure 12 detail A) and is connect-
ed to the expansion tank. Also when the radiator is mounted flat
at the bottom of the vehicle the outgoing connection is connect-
ed to the expansion tank This is the best way to have the system
release air and to add liquid when necessary.
Mobile Diesel Generator
9
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