Manoeuvring System On Engine; Shut Down System; Slow Turning; Control System For Plants With Cpp - Man B&W L35MC6-TII Project Manual

MAN B&W

Manoeuvring System on Engine

The basic manoeuvring diagram is applicable for
reversible engines, i.e. those with Fixed Pitch Pro-
peller (FPP), and shown in Fig. 16.01.02.
The lever on the Engine Side Console can be set
to either Manual or Remote position, see Fig.
16.01.06a, b and c.
In the Manual position the engine is controlled
from the Engine Side Console by the push
buttons START, STOP, and the AHEAD/ASTERN.
The speed is set by the 'Manual speed setting' by
the handwheel.
In the 'Remote' position all signals to the engine
are electronic, the START, STOP, AHEAD and
ASTERN signals activate the solenoid valves ZV
1137 C, ZV 1136 C, ZV 1141 C and ZV 1142 C re-
spectively, shown in Figs. 16.01.02 and 16.01.05,
and the speed setting signal via the electronic
governor and the actuator E 1182 C.
The electrical signal comes from the remote con-
trol system, i.e. the Bridge Control (BC) console,
or from the Engine Control Room (ECR) console.

Shut down system

The engine is stopped by activating the puncture
valve located in the fuel pump either at normal
stopping or at shut down by activating solenoid
valve ZV 1103 C, see Fig. 16.01.02.

Slow turning

The standard manoeuvring system does not
feature slow turning before starting, but for Unat-
tended Machinery Spaces (UMS) we strongly rec-
ommend the addition of the slow turning device
shown in Fig. 16.01.02 as well as Fig. 16.01.03,
option: 4 50 140.
MAN B&W S46MC-C, S42MC, S40MC-C,
S/L35MC, S35MC-C, S26MC
The slow turning valve diverts the starting air to
partially bypass the main starting valve. During
slow turning the engine will rotate so slowly that,
in the event that liquids have accumulated on the
piston top, the engine will stop before any harm
occurs.

Control System for Plants with CPP

Where a controllable pitch propeller is installed,
the control system is to be designed in such a way
that the operational requirements for the whole
plant are fulfilled.
Special attention should be paid to the actual op-
eration mode, e.g. combinator curve with/without
constant frequency shaft generator or constant
engine speed with a power take off.
The following requirements have to be fulfilled:
• The control system is to be equipped with a
load control function limiting the maximum
torque (fuel pump index) in relation to the engine
speed, in order to prevent the engine from being
loaded beyond the limits of the load diagram
• The control system must ensure that the engine
load does not increase at a quicker rate than
permitted by the scavenge air pressure
• Load changes have to take place in such a way
that the governor can keep the engine speed
within the required range.
Please contact the engine builder to get specific
data.
MAN Diesel
16.01
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