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Maintenance: Freshwater system

Coolant. Mixture

WARNING! All glycol is hazardous and harmful

to the environment. Do not consume!

Glycol is ﬂammable.

IMPORTANT! Ethylene glycol must not be

mixed with other types of glycol.

Mix: 40 % “Volvo Penta Coolant” (conc. coolant)

60 % water

This mixture protects the engine against internal cor-

rosion, cavitation and frost damage down to -28 °C

(18°F). (Using 60 % glycol lowers the freezing point

to -54 °C (65°F)). Never mix more than 60 % concen-

trate (Volvo Penta Coolant) in the cooling liquid, this

will give reduced cooling effect and increase the risk

of overheating, and will give reduced freezing protec-

tion.

IMPORTANT! Coolant must be mixed with pure

water, use distilled - de-ionized water. The

water must fulﬁll the requirements speciﬁed by

Volvo Penta, see “Water quality”.

IMPORTANT! It is extremely important that the

correct concentration of coolant is added to the

system. Mix in a separate, clean vessel before

adding into the cooling system. Ensure that the

liquids mix properly.

Water quality

ASTM D4985:

Total solid particles ........................................ < 340 ppm

Total hardness:

............................................... < 9.5° dH

Chloride ......................................................... < 40 ppm

Sulfate ............................................................ < 100 ppm

pH value ......................................................... 5,5–9

Silica (acc. ASTM D859) ................................ < 20 mg SiO

Iron (acc. ASTM D1068) ................................ < 0.10 ppm

Manganese (acc. ASTM D858) ...................... < 0.05 ppm

Conductivity (acc. ASTM D1125) ................... < 500 µS/cm

Organic content, COD

(acc. ISO8467) ....... < 15 mg KMnO

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Volvo D2 Series Betreibershandbuch Seite 43