Stamford D5A T, Operator'S Manual, Page: 66 / 70

66
Technical Data
Coolant specification
Always use Volvo Penta Coolant in the freshwater cooling circuit. Volvo Penta Coolant acts both as anti-freeze
agent and provides corrosion protection for the metal parts of the cooling system. Future claims might be rejec-
ted should Volvo Penta Coolant not have been used.
Important! Mixing other types of concentrated coolant with Volvo Penta Coolant, may decrease
corrosion protection and may damage the engine or block the cooling system.
Water
Always use clean water that complies with the requirements in ASTM D4985. If these requirements are not comp-
lied with, corrosion may occur, which would result in impaired cooling performance.
Total solid particle content .................................... < 340 ppm
Total hardness ....................................................... < 9,5 °dH
Chloride .................................................................. < 40 ppm
Sulphate ................................................................. < 100 ppm
pH value ................................................................. < 5,5 – 9
Silica ...................................................................... < 20 mg SiO
2
/l
Iron ......................................................................... < 0.10 ppm
Manganese ............................................................ < 0.05 ppm
Conductivity ........................................................... < 500
m
S/cm
Organic content, COD
Mn
........................................ <15 mg KMnO
4
/L
Mixing ratio
The mixture of Volvo Penta Coolant and water should contain 40-55% Volvo Penta Coolant. If the coolant
contains less than 40% Volvo Penta Coolant, the cooling galleries in the engine or radiator may be blocked
by contamination. If the coolant contains more than 60% Volvo Penta Coolant the cooling ability of the
coolant mixture is impaired, this may cause the engine to overheat. Too high concentration of Volvo Penta
Coolant also impairs the frost protection.
Important! The mixture of Volvo Penta Coolant and water may never contain less than 40%
Volvo Penta Coolant.
NOTE! Mix the glycol with water in a separate container before filling the cooling system.