Volvo Penta D2-55, Workshop Manual

Page: 70 / 108

68
Coolant. Mixing
WARNING! All glycol is dangerous to human
health and ecologically damaging. Shall not be
consumed!
Glycol is flammable.
IMPORTANT! Ethylene glycol should not be
mixed with other types of glycol.
Mix:
40 % “Volvo Penta Coolant” (conc. coolant)
60 % water
This mixture protects against internal corrosion, cavi-
tation and frost damage down to -28 °C. (Using 60 %
glycol lowers the freezing point to -54 °C.) Never mix
more than 60 % concentrate (Volvo Penta Coolant) in
the cooling liquid, since this would give reduced cool-
ing effect and increase the risk of overheating and
frost damage.
IMPORTANT! Coolant shall 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
filling the cooling system. Make sure that the liq-
uids mix.
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. to ASTM D859) .......................... < 20 mg SiO
2
/l
Iron (acc. to ASTM D1068) .......................... < 0.10 ppm
Manganese (acc. to ASTM D858) ............... < 0.05 ppm
Conductivity (acc. to ASTM D1125) ............ < 500 µS/cm
Organic content, COD
Mn
(acc. ISO8467) .... < 15 mg KMnO
4
/l