Engine - Emergency Shutdown - MTU 12V 4000 L32 F Operating Instructions Manual

4.9 Engine – Emergency shutdown
WARNING
Escaping residual gas may create an explosive atmosphere in case of emergency stop.
Explosion hazard!
• Ensure that any escaping residual gas is routed out by means of appropriate facility ventilation and
use of an SBV (safety blow-off valve) to prevent any risk of explosive atmosphere.
• Install an SAV (safety shut-off valve) in the gas control system when using gas control systems with
inlet pressures in excess of 0.1 bar.
• Install an SAV (safety shut-off valve) and an SBV (safety blow-off valve) in the gas control system
when using single-stage gas control systems with inlet pressures in excess of 1 bar.
NOTICE
An emergency stop subjects the engine system to an extremely high load.
Risk of overheating, damage to components!
• Trigger an emergency stop only in emergency situations.
Emergency engine shutdown
Item
Gas shut-off solenoids
Ignition, ignition system
Throttle flaps
Room ventilation, facility
ventilation
Table 35: Emergency engine shutdown
Measure
Two contacts are provided for electrical connection. Close gas shut-off sole-
noids.
• engine stop.
In the case of an external EMERGENCY STOP, the ignition remains on until
the engine has run down to a standstill in order to safely burn off uncombust-
ed fuel/air mixture.
• The ignition is only switched off in case of an overspeed violation or an
internal ignition fault.
The throttle flaps are always closed in case of EMERGENCY STOP. Closing
the throttle flaps impedes the scavenging of residual gas. External ventilation
and inerting systems shall therefore be activated following an emergency en-
gine stop.
Residual gas may escape from the fuel line in case of EMERGENCY STOP.
• A contact is provided to request room and facility ventilation.
MS150104/02E 2016-11 | Operation | 49