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Environmental Manager in coordination with the Production Department, prior to performing the operation. Emergency Shutdown and Emergency Operations (Leak at the System) NOTE: There are no emergency operations for the aqueous ammonia 19%SCR system. (1) Activate the Emergency Stop through the manual button near the tank/pump skid or through the control panel. This will shut off the pumps and close the main flow control valve. (2) Run the flush sequence, sending waterto the exhaust and removing any residual aqueous ammonia from the piping. Note: Start the atomizing air before purging with water to ensure un-atomized fluid does not flow into the duct. A safe shutdown fault is triggered, causing the centrifugal pump to switch off, and indicated on the HMI in the following conditions: • Storage tank level is below minimum level. • Strainer is clogged. • Pressure in the liquid feed line has fallen below minimum level. • Pressure in the atomizing air line has fallen below the minimum level. • Electrical issue, such as fuse or breaker, for pump motor occurs. Startup Following an Emergency Shutdown NOTE: Operational readiness is prepared by the PLC and the injection system is automatically restarted after the fault is cleared. If standby pump is ready for operation, it will automatically start if the system is automatic mode. (1) Determine (and correct if necessary) any problems before restarting the system. (2) Use the normal startup procedures to restart the system once all problems have been corrected. Power Loss NOTE: If the power supply for the NOx controller fails, the injection spray system remains in the status that was present at the time of the power loss. (1) Once the power loss issue is resolved, the reset button is pressed. (2) The spray system will be restarted if all other operational readiness conditions are met and injection is required. Page I B-5