Radiator Cooling - Mastervolt WHISPER 3 Installation Manual

INSTALLATION
2.4.2

Radiator cooling

1 GENERAL INSTRUCTIONS
The radiator unit can be mounted below the floor, in the
side or on the roof of the vehicle.
Wherever the radiator is mounted the well functioning of
the system depends on the well circulation of the coolant.
Roof mounted radiators bring the most risk for circulation
problems because air trapped in the radiators or a low
level of the coolant, will immediately affect the cooling
capacity of the radiators.
It is recommended to keep the radiators as close as
possible to the unit. The piping should be fitted as direct as
possible.
When the radiators are above the engine, the piping
should be fitted below the top of the radiators! (refer to
figure 9). Bents in the piping, that can trap air bubbles,
should be avoided.
No bent of piping above the radiator
Figure 9. Remove the air trap
2 ALTERNATOR COOLING SYSTEM
Special attention should be paid to the ventilation of the
alternator cooling system. The installation kit 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.
8
Different from marine seawater-cooling installations,
radiator systems use an open -non pressurised- system.
Therefore the 12 mm overflow pillar on the expansion tank
should stay open. A piece of hose can be used to drain
redundant liquid that is thrown out because of the
expansion of the liquid in the system. When open the
expansion tanks can easily release air that is ventilated by
the different connections.
As the capacity of the alternator cooling system is very
small, the filling can be done via the expansion tank. It
could be necessary to refill the tank a few times. The
pump of the alternator cooling system is self-priming and
this makes the system less sensitive for air traps.
When mounting the radiator unit it is important to take care
that the outgoing connection, which is the connection to
the alternator inlet, is on the top position (refer to figure 10
detail A) and is connected to the expansion tank. Also
when the radiator is mounted flat at the bottom of the
vehicle the outgoing connection is connected to the
expansion tank This is the best way to have the system
release air and to add liquid when necessary.
ATTENTION!
The expansion tank must be fitted in the outlet
of the radiator = the inlet pipe of the engine
Side mount
bottom mount
Bottom mount
Figure 10. Outgoing connection connected to the
expansion tank
November 2006 / WHISPER 3,5 for mobile applications / EN