WÄRTSILÄ Vasa R22, Instruction Manual

Page: 51 / 297

10 seconds. If this attempt also fails, the program relay will
connect the alarm circuit. On engines equipped with pneumatic
starting motors the period between the starting attempts should
be long enough to guarantee that the flywheel has stopped.
4 When the engine has reached a predetermined speed,
an auxiliary relay energized by the remote tacho transmitter
cuts off the starting circuit, and the starting air solenoid valve
closes.
At the same time the current to the priming pump will be
disconnected thus preventing the pump from operating when
the engine is running.
On certain installations the priming pump will continue to
operate at low engine speed to assist the engine driven lubri-
cating oil pump to maintain the oil pressure. After a fixed time
(10 - 30 s.) the system for alarm, stop and speed remote control
will be automatically connected.
03.2 Stop
03.2.1 Manual stop
1 Engines with built-on circulating water pump: Idle the
engine 3 - 5 minutes before stopping. Engines with separate
circulating water pump: 2 - 3 minutes will be enough, but
the water pump should run for some 5 minutes more.
2 Stop the engine by moving the stop lever into stop posi-
tion. The time of slowing down offers a good opportunity to
detect possible disturbing sounds.
03.2.2 Remote stop
1 Point 1 above is valid.
2 Press the remote control stop button. The shut-down so-
lenoid, built on the governor, will then be energized for a fixed
time and at the same time, parallel to governor, the pneumatic
stop coil is also activated. The control racks of the injection
pumps move into stop position. The time for the solenoid to be
energized is set so (20 - 50 s.) that the solenoid operates until
the engine stops. During this time the engine cannot be restart-
ed. After a predetermined time the shut-down solenoid will
return to its initial position.
3 When the engine stops and the speed decreases below a
certain limit, the system for alarm, stop and speed remote
control will be disconnected and the signal lamp indicating
that the engine is running goes out.
In engines equipped with automatic lubricating oil priming
pumps, the pump will be started at the same time.
22-9632 Start, Stop and Operation 03
VASA 22 03 - 3