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Item
Function
Effect
010
PressCtrl mode 1 button
Starts the PressCtrl mode 1
This mode is applicable only, if the steam pressure signal from
the steam plant is correct.
SPC compares the setpoint and the actual steam pressure. If
there is a difference, it opens or closes the EWG to change the
steam pressure.
If the status of the steam pressure signal changes to FAIL, SPC
will change to MinEWGPos mode.
011
PressCtrl mode 2 button
Starts the PressCtrl mode 2
Same effect as PressCtrl mode 1: But, if the burner is ON, the
SPC uses the minimum permitted EWG position only.
012
Steam Pressure Setpoint
Shows the actual setpoint of the steam pressure
You can manually set the setpoint, if the PressCtrl mode 1 or 2
is active.
It is only possible to set the setpoint if the specific LDU-20 is in
control.
013
Manual EWG Setpoint
Shows the actual EWG setpoint
If the ManEWGSetp mode is active, you can enter the EWG
setpoint.
014
EWG Limitation
Shows the current EWG setpoint together with the actual mini-
mum and maximum limitations
Too wide EWG opening decreases the scavenge air pressure.
This will start the auxiliary blowers.
The limit of the EWG opening prevents the scavenge air pres-
sure to decrease below the switching-On point of the auxiliary
blowers.
015
dIT
Shows the delta injection timing (dIT)
SPC calculates the dIT. The dIT controls the timing of the fuel
injection. This timing is related to the difference between EWG
setpoint and the minimum permitted EWG position.
The ECS controls, if the dIT from SPC will be used or not.
Rule: If ICC is on, then dIT is not used.
4.13.3
Steam boost mode (SBM)
Steam boost mode is an optional application that can be activated or deactivated manually. It is
only available in gas mode operation. Activating the steam boost mode allows for a higher steam
production on board. The steam boost mode is available for two different power ranges:
•
51% to 91% of the contracted maximum continuous rating
•
76% to 91% of the engine power
The steam boost mode offset can be chosen freely on the LDU from 0% to 100%. Use the LDU-
Screen to control the steam boost mode functions.
X92-B
AA00-9270-00AAA-043C-A
Operation Manual
Steam production control system
Winterthur Gas & Diesel Ltd.
- 108 -
Issue 002 2021-11
Содержание X92-B
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