2.7.2 Ventilation sequence
The ventilation sequence removes unburned gas from the exhaust gas system to the air.
After an engine stop, if necessary the engine safety system (ESS) or the ECS sends a signal for
a ventilation request.
NOTE: For the operation of the ventilation sequence, refer to section 6.8.12 LDU-20 page -
EXHAUST VENTILATION.
The steps of the ventilation sequence are as follows:
•
The engine safety system (ESS) or the ECS sends a signal to the control panel
(Ventilation Request “Automatic”).
NOTE: A start interlock is active until the ventilation is automatically or manually
stopped.
NOTE: If necessary the operator can manually send a signal (Ventilation Request
“Manual”).
•
The operator must always start the ventilation sequence manually:
○
The operator starts the auxiliary blowers.
○
The operator starts the servo oil service pump.
•
The exhaust valves open and the ventilation starts (Ventilation Passed “In progress”).
•
If necessary the operator can always stop the ventilation before the automatic stop (for
example if there is an urgent need to start the engine immediately).
•
After a specified period the ECS stops the ventilation (Ventilation Passed “Yes”).
•
At the next engine start the ECS does a longer air run than usual.
X92DF
AA00-0000-00AAA-012G-A
Operation Manual Prevention of explosions in the exhaust gas system (gas mode)
Winterthur Gas & Diesel Ltd.
- 59 - Issue 002 2020-08
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