WinGD X72-B - Page 237

•
Starts step 1 (FGSS preparation):
○
Waits for the signal FGSS is ready.
NOTE: All valves are in diesel operation position.
○
Activates the FGSS ready signal from PCS to iGPR.
•
Starts step 2 (automatic leakage test):
○
Activates the leakage test active signal from iGPR to PCS and ECS.
•
Pressurizes the iGPR piping.
•
Monitors the pressure drop in the iGPR piping.
○
Activates the leakage test OK signal from iGPR to PCS and ECS.
○
Deactivates the leakage test active signal from iGPR to PCS and ECS.
•
Starts step 3 (flushing):
○
Activates the flushing active signal from iGPR to PCS and ECS.
○
Opens the shut-off valve (CV7285C).
○
Closes the vent valve at the engine inlet (CV7289C).
○
Opens the pressure regulating valve (CV7288C).
○
Opens the shut-off valves (CV7291C, CV7292C) and the vent valves (CV7286C,
CV7287C).
○
Activates the flushing OK signal from iGPR to PCS and ECS.
○
Deactivates the flushing active signal from iGPR to PCS and ECS.
•
Starts step 4 (pressurization and stabilisation):
○
Activates the pressure stabilisation active signal from iGPR to PCS and ECS.
○
Closes the vent valves (CV7286C, CV7287C)
○
Starts the pressurization and stabilisation.
○
Activates the pressure stabilisation OK signal from iGPR to PCS and ECS.
○
Deactivates the pressure stabilisation active signal from iGPR to PCS and ECS.
○
Activates the transfer preparation OK signal from iGPR to PCS and ECS.
NOTE: The ECS uses this signal to start the GAV operation.
NOTE: If one of the transfer preparation steps is not successful, the iGPR control system
sends a gas trip signal to the PCS and ECS. Then the iGPR control system
changes to degassing state, refer to Para 6.3.3.
6.3.2 Overpressure release state
The iGPR control system automatically starts the steps that follow, if the gas pressure is 0.5 bar
above the setpoint value:
•
Opens the vent valve (CV7289C) as long as necessary.
•
Controls the pressure regulating valve (CV7288C).
6.3.3 Shutdown on gas operation
The iGPR control system automatically starts different steps related to the conditions.
If you manually start a transfer to diesel operation (refer to section [section not applicable for this
engine]), or if there is a usual gas trip and the ECS parameter “vent valve active mode” is ON, the
iGPR control system automatically starts the steps that follow:
X72-B
AA00-8904-00AAA-043A-A
Operation Manual Integrated gas pressure regulation
Winterthur Gas & Diesel Ltd.
- 237 - Issue 003 2021-12