Water Quality - Volvo Penta D1-20 Operator's Manual

Maintenance: Freshwater system
32
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 % 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 wa-
ter must fulfill the requirements specified by Vol-
vo 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 ........................................................
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
Mn
5,5– 9
(acc. ISO8467) .... < 15 mg KMnO
/l
2
/l
4