Vetus D-LINE VD4.120 Operation Manual page 88

7 Lay-up / Winter storage procedure
4 Raw water cooling system
• Close the sea cock.
• Remove the lid of the water strainer.
• If necessary, clean the raw water strainer.
86
t !
ip
Combine flushing the raw water circuit
with fresh water with running the en-
gine with the protective fuel mixture,
see 'Winter storage procedure - Protec-
tive fuel mixture'
• Connect the raw water intake to a fresh wa-
ter (tap water) supply or a tank containing
fresh water. Open the tap and allow the en-
gine to idle for at least 5 minutes to remove
any salt and contamination from the raw
water cooling system.
Make sure that there is a sufficient supply
of water to prevent the engine from over-
heating.
Heat exchanger
Only clean the heat exchanger if this is
absolutely necessary, see page
Charge-air cooler
Only clean the heat exchanger if neces-
sary, see page 78.
Raw water pump
Check the impeller of the raw water
pump at least once every two years, see
page 62.
• Stop the engine and close the sea cock.
• The raw water system must be protected in
areas where the temperature drops to be-
low zero during the winter.
Pour 1 litre (1/4 gallon) of anti-freeze
(preferably a non-toxic biodegradable an-
ti-freeze) into the water strainer and run
the engine until the anti-freeze has disap-
peared into the cooling system.
73.