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Special attention should be paid to the ventilation of the
system. 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 circulation of the engine coolant.
For the engine we use a pressurised system. The 12 mm
connection on the top is closed. Wherever the radiator is
mounted it is necessary to ventilate the exhaust manifold
of the engine. The exhaust manifold has an 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. (refer to figure 6).
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 12).
Figure 12:
7 litres optional expansion tank with low level alarm
When mounting the radiator, 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 13
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.
EN / W-SQ20 / December 2016
The expansion tank must be fitted in the outlet
of the radiator = the inlet pipe of the engine
Figure 13:
Outgoing connection connected to the expansion tank
When the radiator is mounted flat on the roof, the
expansion tank should be mounted a little higher. (refer to
figure 14 detail B).
Figure 14:
Low profile radiator assembly on the roof
Most cooling problems originate from air traps
blocking the circulation of the engine coolant.
INSTALLATION
11
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