Engine turning device (9N15)
The crankshaft can be slowly rotated with the turning device for maintenance purposes. The motor starter
must be designed for reversible control of the motor. The electric motor ratings are listed in the table below.
Table 14.2 Electric motor ratings for engine turning device
Current [A]
Power [kW]
Frequency [Hz]
Voltage [V]
Engine type
5.0 / 5.3
2.2 / 2.6
50 / 60
3 x 400 / 440
Wärtsilä 34DF
Pre-lubricating oil pump
The pre-lubricating oil pump must always be running when the engine is stopped. The pump shall start
when the engine stops, and stop when the engine starts. The engine control system handles start/stop of
the pump automatically via a motor starter.
It is recommended to arrange a back-up power supply from an emergency power source. Diesel generators
serving as the main source of electrical power must be able to resume their operation in a black out situation
by means of stored energy. Depending on system design and classification regulations, it may be permissible
to use the emergency generator.
For dimensioning of the pre-lubricating oil pump starter, the values indicated below can be used. For different
voltages, the values may differ slightly.
Table 14.3 Electric motor ratings for pre-lubricating pump
Current [A]
Power [kW]
Frequency [Hz]
Voltage [V]
Engine type
14.0
7.5
50
3 x 400
in-line engines
14.6
8.6
60
3 x 440
29.0
15.5
50
3 x 400
V-engines
30.5
18.0
60
3 x 440
Exhaust gas ventilation unit
The exhaust gas ventilating unit is engine specific and includes an electric driven fan, flow switch and
closing valve. For further information, see chapter Exhaust gas system.
Gas valve unit (GVU)
The gas valve unit is engine specific and controls the gas flow to the engine. The GVU is equipped with a
built-on control system. For further information, see chapter Fuel system.
Stand-by pump, lubricating oil (if installed) (2P04)
The engine control system starts the pump automatically via a motor starter, if the lubricating oil pressure
drops below a preset level when the engine is running. There is a dedicated sensor on the engine for this
purpose.
The pump must not be running when the engine is stopped, nor may it be used for pre-lubricating purposes.
Neither should it be operated in parallel with the main pump, when the main pump is in order.
Stand-by pump, HT cooling water (if installed) (4P03)
The engine control system starts the pump automatically via a motor starter, if the cooling water pressure
drops below a preset level when the engine is running. There is a dedicated sensor on the engine for this
purpose.
Stand-by pump, LT cooling water (if installed) (4P05)
The engine control system starts the pump automatically via a motor starter, if the cooling water pressure
drops below a preset level when the engine is running. There is a dedicated sensor on the engine for this
purpose.
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Product Guide Wärtsilä 34DF - 3/2012
Product Guide
14. Automation System
