CHANGE OVER TO EMERGENCY/LOCAL OPERATION

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Change over to Emergency or Local Operation

Local operation of the engine could be required when:

•           The Bridge control unit has failed (power supply loss ?)

•           The limits of the Bridge control system are preventing the required operation of the engine (thermal limitations, scavenge air limiter, etc)

•           The main engine governor has failed.

Note that if the start system (automatic valve, cylinder start air valve, or reversing servo unit) has failed, then changing to emergency control will not resolve the problems.

Procedure for change-over

1.         Contact the Bridge and ask to stop the main engine

2.         Go to the local control and change over the control position to emergency control using the control selector switch/lever

3.         Change over the control of the fuel pump from the governor to the local control lever/wheel. This will dis-engage the governor control

4.         You can now operate the system locally, by

•                           Accept the telegraph command from the Bridge

•                           Move the direction lever into the required ahead or astern position

•                           Move the start lever or depress the start button to open the automatic valve

•                           When the engine has started, release the start lever

•                           Move the fuel control lever to achieve the desired speed

Note that the duration of air admission and quantity of fuel delivered are all dependant upon the operator, as all engine protection has been over-ridden