WÄRTSILÄ WARTSILA32, Product Manual, Page: 139 / 254

Fig 9-8 Example diagram for common auxiliary engines and a low speed main
engine with spilt LT and HT circuit (DAAE026913A)
Notes:
* Preheating
** Depending of Main engine type
The preheating unit (4N01) is needed for preheating before start of first auxiliary engine AE, if the heater (4E05) is not installed.
The pump (4P04) is used for preheating of stopped main engine and auxiliary engine with heat from running auxiliary engine.
The pump (4P14) preheats stopped auxiliary engine when main engine is running.
The heater (4E05) is only needed if the heat from the running auxiliary engine is not sufficient for preheating the main engine, e.g.
in extreme winter conditions
It is not necessary to open/close valve when switching on the preheating of main engine or auxiliary engine.
The LT-circulating pump 4P15 can alternatively be mounted after the central coolers 4E08 and thermostatic valve 4V08 which gives
possibility to use a smaller pump in harbour without clousing valves to main engine.
System components:
Circulating pump (HT) 4P14 Lubricating oil cooler 2E01
Circulating pump (LT) 4P15 Heat recovery (evaporator) ME 4E03-1
Circulating pump (evaporator) 4P19 Heat recovery (evaporator) ME + AE 4E03-2
Circulating pump (preheating HT) 4P20 Raw water cooler (HT) 4E04
Air venting 4S01 Heater (preheater), optional 4E05
Expansion tank (HT) 4T01 Central cooler 4E08
Expansion tank (LT) 4T02 Cooler (installation parts) 4E12
Temperature control valve (HT) 4V01 Cooler (generator), optional 4E15
Temperature control valve (LT) 4V03 Cooler (scavenge air) 4E21
Wärtsilä 32 Product Guide - a21 - 7 September 2016 9-9
9. Cooling Water System Wärtsilä 32 Product Guide