Volvo Penta TAMD74A, Operator'S Manual

Page: 38 / 76

36
Maintenance: Freshwater system
Anti-freeze mixture
When there is risk of freezing, a mixture of 50% Volvo
Penta anti-freeze (glycol) and 50% water (complying
with ASTM D4985) must be used. This mixture will
protect against freezing down to approx. –40°C
(–40°F) and is to be used all year round.
IMPORTANT! Even if the temperature never
falls as low as –40°C (–40°F), the mixture speci-
fied above should still be used to provide ade-
quate anti-corrosive properties.
Mix the glycol with water in a separate container be-
fore filling the cooling system.
WARNING! Glycol is a health hazard (poison!).
IMPORTANT! Alcohol must not be used in the
cooling system.
Anti-corrosion mixture
Water (complying to ASTM D4985) mixed with Volvo
Penta anti-corrosion agent can be used as a coolant
when there is no risk of freezing.
Using an anti-freeze mixture all year round is recom-
mended, however, whatever the climate.
Mix as directed on the packaging. Run the engine
warm after filling to obtain the best effect of the addi-
tive.
If the operating time exceeds 500 hours a year, the
anti-corrosive protection in the coolant must be sup-
plemented with 1/2 litre anti-corrosion agent every
500 hours.
WARNING! Anti-corrosion agent is a health haz-
ard (poison!).
IMPORTANT! Never mix anti-corrosion agent
with anti-freeze (glycol). Frothing can occur and
severley impair the cooling properties.