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M-SQ PRO 15/18 kVA Marine Diesel Generator 13
2.5.13 Cooling liquid
The engine is cooled by cooling liquid. The capacity is:
4,0 ltr. for SQ-Pro 15 / 8,1 ltr. for SQ-Pro 18
Always use coolant which is compatible with alumini-
um components of the cooling system. Do not mix
coolants with different kinds of chemical compound,
as this may cause congelation of the coolant. In case
of doubt refresh the content of the entire cooling
system. Use only long-life type G12+ cooling liquid in
order to minimize maintenance.
We recommend not using water but cooling liquid that is market-
ed for the use in combustion engines. Cooling liquid protects the
engine against frost to minus 25° C. Also it protects the engine
block against corrosion. One can fill the engine via the filling
cap on the exhaust manifold. Fill up till the fluid is leveled with
the indicator in the manifold (see fig 11 ). When the engine is
on temperature the liquid will expand and the redundant liquid
will be pressed into the expansion tank. This tank has to be filled
up till the mark. When cooling liquid is not available clean fresh
water could be used with an additive of anti-freeze. When using
water with anti- freeze the right mixture has to be calculated
according to the information of the supplier of the anti-freeze.
When the cooling is based on keel cooling or radiator cooling the
capacity of these coolers and piping has to be taken into account
calculating the right mixture.
The cooling liquid in the engine is pressurised and has a
boiling point above 100° C. The temperature switch in the ther-
mostat housing switches at 110° C. When keel cooling is applied
the cooling system is not pressurised. There should be a special
cap on the manifold without valves leaving the connection to the
expansion tank open. See the special manual on keel cooling and
radiator cooling.
Fig.11 Komt hier een naam van dit afbeelding? of mag dit weg