Nanni N4.65 User Manual

67
S08 MAINTENANCE
DRAINING THE COOLANT CIRCUIT
1. Stop the engine and remove the key from the panel.
2. Put a container along with a hose under the drain
plug (A) located at the bottom of the water cooling
box to collect coolant. Remove the top ller cap (B)
to ease draining flow.
3. Drain off all coolant. Empty the recovery container as
well as the hoses used in the process.
4. Insert a hose into the heat exchanger ller port. Rinse
with fresh water until water which flows from the
drain port is clean.
5. Reinstall the drain plug(s), secure them and ll with
new coolant as explained on next paragraph..
COOLANT - FILLING
Mix the anti-freeze with water in a clean container before
lling the heat exchanger. The coolant must be totally
free from dust. Fill the exchanger slowly not to introduce
air into the coolant system.
Refer to the chapter TECHNICAL DATA to know the
coolant capacity of the heat exchanger. For Keel Cooling
system or when using a water boiler, the coolant capacity
must be adapted according to the pipes length and the
tank capacity.
TO FILL THE COOLANT SYSTEM:
1. Check that the drain plug at bottom of exchanger (in
red) is properly tightened.
2. Open the vent in blue (red circle) on left side of the
picture.
3. Add coolant through the heat exchanger ller port
on top (in blue and red arrow) up to when coolant is
overflowing through circled blue vent.
4. Close and secure vent and cap.
5. Start the engine and let it operate few minutes at
idle. Stop the engine, wait few minutes and check
the coolant level in the heat exchanger and in the
expansion tank. Top up if necessary.
CAUTION !
If a boiler is connected to the engine, follow the lling
procedure given by the manufacturer of the boiler. If
the boiler is above the engine in the boat, rst ll the
heat exchanger, the boiler, and top up with coolant the
recovery tank located above the boiler.
Make sure not to overll the heat exchanger when lling
with coolant. If too much coolant has been added, drain
part of the coolant.

Nanni N4.65 Specifications

General

Brand	Nanni
Model	N4.65
Category	Engine
Language	English