WÄRTSILÄ Vasa R22, Instruction Manual

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19. Cooling Water System
19.1 General description
19.1.1 General
The engine is cooled by a fresh water system, divided into a high
temperature circuit (HT) and a low temperature circuit (LT). The
fresh water is cooled in a separate central cooler.
The LT circuit is provided with a temperature control valve
which keeps the temperature in the circuit at a load dependent
level. Thus the temperature in the LT system rises at low load
and the charge air is heated instead of cooled. The heat for this
purpose is gained from the oil system via the oil cooler.
The system outside the engine can vary widely. Fig 19-1 shows
a system with separate coolers (14) and (16) for the LT and HT
circuit. The system can also be built with a common cooler for the
HT and LT circuit.
Cooling water system
A
C
B
A
C
B
2
3
4
5
6
7
9
8
13
10
15
11
12 17 18
16 14
1
1. Expansion tank
2. Box for venting
3. Temperature sensor
4. Temperature sensor
5. Pressure gauge
6. Pressure gauge
7. Charge air cooler
8. Water pump
9. Water pump
10. LT-Temperature control valve
11. HT-Temperature control valve
12. Heater
13. Pump
14. Central cooler
15. Lube oil cooler
16. Central cooler
17. Cooler
18. Non-return valve
Fig 19-1
2219519428
22-9601 Cooling Water System 19
VASA 22 19 - 1