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 corrosion, 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 % concentrate (Volvo Penta Coolant) in the cooling liquid, this will give reduced cooling effect and increase the risk of overheating, and will give reduced freezing protection. 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 SiO2/l Iron (acc. ASTM D1068)................................. < 0.10 ppm Manganese (acc. ASTM D858)....................... < 0.05 ppm Conductivity (acc. ASTM D1125).................... < 500 µS/cm Organic content, CODMn (acc. ISO8467)........ < 15 mg KMnO4/l
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