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Maintenance: Freshwater system
Cooling system D49A/D65A MT HE
The thermostat regulated freshwater system is cooling the engine and the lubrication oil ccolers. An engine moun-
ted freshwater pump circulates the coolant through the heat exchanger and through the engine.
The rawwater system is cooling the charge air and the coolant in the freshwater cooling system. The rawwater cir-
cuit is designed for seawater or for connection to a central cooling system.
1. Rawwater inlet
2. Rawwater pump (optional)
3. Charge air cooler
4. Fresh water pump
5. Lubrication oil cooler
6. Engine
7. Thermostat valve
8. Engine mounted
heat exchanger
9. Expansion tank
10. Raw water outlet
1.
3.
3.
4.
5.
6.
5.
6.
7.
7.
2.
8.
9.
10.
Freshwater circuit
Rawwater circuit
Freshwater drain points (D)
D
D
D
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Summary of Contents for D49A MS
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