Volvo IPS650, Installation Manual

Page: 106 / 160

Freshwater System
General
Freshwater circulates through the engine cooling
ducts and heat exchanger with the aid of a centrifugal
pump.
As long as the coolant is cold the thermostat is closed,
which prevents the coolant from passing through the
heat exchanger. The coolant passes instead through
a bypass/shunt line back to the suction side of the
pump. This means the engine quickly reaches its
working temperature. The thermostat also controls
correct temperature under low power and loads.
Coolant
We recommend “Volvo Penta Coolant, Ready Mixed”,
or “Volvo Penta Coolant” (concentrated) mixed with
pure water according to specifications; refer to Water
quality. Only coolant of this grade is suitable and
approved by Volvo Penta.
Coolant must contain good quality ethylene glycol of
a suitable chemical composition in order to achieve
the right engine protection. The use of corrosion pro-
tection alone is not permitted in Volvo Penta engines.
Never use water alone as the coolant.
IMPORTANT!
Coolant must be used all year round. This is in order
to ensure that the engine has the proper corrosion
protection even though there may never be any risk
of freezing. Future warranty claims related to the
engine and accessories may be declined if the wrong
coolant has been used, or if the instructions for cool-
ant mixture have not been followed.
” Volvo Penta coolant ” is a concentrated coolant that
must be mixed with water. It has been developed to
function optimally in Volvo Penta engines and it pro-
vides excellent protection against corrosion, cavita-
tion and freeze damage.
” Volvo Penta coolant, ready mixed ” is a ready
mixed coolant comprised of 40% ”Volvo Penta cool-
ant” and 60% water. This concentration protects the
engine from corrosion, cavitation damage and the risk
of freezing down to -28 °C (18 °F).
Coolant mixture
WARNING!
All coolant is hazardous and harmful to the
environment. Do not consume. Coolant is flammable.
IMPORTANT!
Ethylene glycol may not be mixed with other types of
glycol.
Mix 40% ”Volvo Penta coolant” (con. coolant) with
60% water.
This mixture protects the engine against corrosion,
cavitation and freezing temperatures down to -28 °C;
(a 60% glycol mixture reduces the freezing point to
-54 °C). Never mix more than 60% concentrate (Volvo
Penta Coolant) in the coolant mixture as this reduces
cooling effect, increases the risk for overheating and
provides reduced protection against freezing.
IMPORTANT!
The coolant must be mixed with clean water. Use
distilled/deionized water . The water must fulfill
requirements specified by Volvo Penta; refer to Water
Quality .
IMPORTANT!
It is extremely important that the system be filled with
the correct coolant concentration. Mix the liquids in a
separate, clean container before filling the cooling
system. Check that the liquids mix properly.
NOTICE! From and including 2011 all Volvo Penta
engines use yellow glycol (VCS). Volvo Penta coolant
(green glycol) may under no circumstances be mixed
with VCS (yellow glycol). The expansion tank is
marked with the type of glycol to be used.
Installation, Volvo Penta IPS
104 47704162 10-2014 © AB VOLVO PENTA