4.15.2.1
HP SCR system - emergency bypass
In this operation mode, the HP SCR system is bypassed. The HP SCR control system opens
the valve V3 quickly. The engine operates in Tier II mode.
If necessary, you can start this operation mode manually. You use the related switch on one of
the control boxes, refer to
The HP SCR control system changes to emergency bypass mode automatically, if a condition
for correct operation of the HP SCR system is not given, for example if a bus connection is
defective.
The valves have the conditions that follow:
•
V1 - Closed
•
V2 - Closed
•
V3 - Open
•
V4 - Controlled by the ECS
•
V7 - Closed, can be opened to decrease the pressure in the reactor
Fig 4-27
HP SCR system - emergency bypass
V1
V2
V3
V7
V4
003
001
007
006
005
004
002
Legend
001
Mixing duct
005
Venting/sealing unit
002
Reactor
006
Urea solution supply unit
003
Turbine of turbocharger
007
Soot blowing unit
004
Engine
X92DF
AA00-9270-00AAA-043A-A
Operation Manual
HP Selective catalytic reduction system
Winterthur Gas & Diesel Ltd.
- 123 -
Issue 002 2020-08
Содержание X92DF
Страница 18: ...X92DF Operation Manual Page left intentionally blank Winterthur Gas Diesel Ltd 18 Issue 002 2020 08...
Страница 147: ...X92DF Operation Manual Page left intentionally blank Winterthur Gas Diesel Ltd 147 Issue 002 2020 08...
Страница 253: ...X92DF Operation Manual Page left intentionally blank Winterthur Gas Diesel Ltd 253 Issue 002 2020 08...
Страница 425: ...7 Installation 7 1 Installation 426 X92DF Operation Manual Winterthur Gas Diesel Ltd 425 Issue 002 2020 08...