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Maintenance: Freshwater system
58
Draining the coolant
WARNING! Stop the engine and allow it to cool
down before draining. Hot coolant and hot
surfaces can cause burns.
WARNING! Glycol is a health hazard (poison).
Collect the old coolant and leave it to a destruc-
tion plant.
1. Remove the filler cap from the expansion tank.
2. Connect a suitable hose to each drain point, refer
to section "Drain points". Open the drains and al-
low the coolant to drain off into a suitable vessel.
IMPORTANT! Check that all coolant really does
drain out. Deposits may need to be cleared
away, inside the drain plug(s)/tap(s).
3. Drain all other systems connected to the freshwa-
ter system (HT-circuit), e.g. heater, water heater,
etc.
4. Close all drains.
Flushing the freshwater system
(HT-circuit)
The system should be flushed before changing coo-
lant to avoid inferior cooling performance due to depo-
sits in the cooling system.
1. Drain the coolant as described earlier.
2. Insert a hose into the filler opening on the expan-
sion tank and flush with fresh water.
3. Flush until the water running out of the drainage
points is clean.
4. Close all drain points when the flushing water has
run out.
5. Fill with coolant. See section "coolant filling when
empty".
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