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47 48 49 LEGEND
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VAL VE ( IIORHALL Y OPEii i PRESSURE GAUGE THERMOMETER ELECTRICAL CONNECTION PRESSURE SWITCH
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VALVE !NORMALLY THROTTLED)
CHECK VALVE RELIEF VALVE
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OIL ALARMS
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AIR SIDE SEAL OIL PUIIP-OFF IT2]
SEAL OIL PRESSURE-LOW
[OJ SEAL OIL TURB I IIE BACKUP PRESSURE-LOW
[I3J HYDROGEN SIDE SEAL OIL PUHP-OFF
[JJ AIR SIDE SEAL OIL BACK.UP PUl1P-RUl!NII.JG CONDENSED OPERATING INSTRUCTIONS SEE INSTRUCTION BOOK FOR COMPLETE OPERATING INSTRUCTIONS GENERAL-SEAL OIL PRESSURE MUST BE MAINTAINED AT THE HYDROGEN SEALS WHEN HYDROGEN IS IN THE GENERATOR OR WHEN THE SHAFT IS TURii I NG.
THE HYDROGEN PRESSURE HAY BE VARIED UP TO 75 PSIG. SEAL OIL PRESSURE IS NORHALLY HAINTAINED AT 12 PSI ABOVE THE HYDROGEN PRESSURE.
3 PSI IS REQUIRED TO HAINTAll*I A SEAL WHEI\\I RUl*ll*IIl'IG.
THE VAPOR E/TRACTORS SHOULD BE OPERATED CONTINUOUSLY WHEN THE GENERATOR IS FILLED WITH HYDROGEN.
HYDROGEN SHOULD BE PURGED FROM THE GENERATOR BEFORE HAIN OIL RESERVOIR IS DRAINED.
DUPLEX FILTERS PROVIDE FOR ON-LINE FILTER ELEMENT REPLACEHENT.
REFER TO INSTRUCTION HANUAL DC-663280-48 SEAL OIL SUPPLY-EMERGENCY SOURCES MAIN OIL PUHP ON TURBINE SEAL OIL BACKUP PUHP ON MAIN OIL RESERVIOR AIR SIDE SEAL OIL BACKUP SHAFT' PUHP J WILL HAINTAIN 75 PSIG HYDROGEN PRESSURE TURNING GEAR BEARING OIL PUHPS-WILL MAINTAIN 2 PSIG HYDROGEN PRESSURE THE TURBINE BACKUP REGULATOR VALVE 264 OPENS WHEN THE DIFFEREN-TIAL PRESSURE AT THE SEALS DECREASES TO 8 PSI. THEN IF THE SEAL DIFFER EIIT I AL PRESSURE DECP:EASES TO 5 PS I, PRESSURE SWITCH [I;]
ACTIVATES THE AIR SIDE SEAL OIL BACKUP PUHP ON THE SEAL OIL UNIT AND THE DIFFERENTIAL PRESSURE IS RESTORED TO 12 PSI.
THE NEXT AVAILABLE SOURCES OF EMERGENCY OIL AFTER THE AIR SIDE SEAL OIL BACKUP PUMP APE THE TURNING GEAP BEARING OIL PUMPS ON THE HAIN OIL RESERVIOR. THESE CAN MAINTAIN A HYDROGEN PRESSURE OF 2 PSIG ONLY.
WHEN THE AIR SIDE SEAL OIL BACKUP PUMP IS RUN-NING, HYDROGEN PRESSURE SHOULD BE REDUCED TO 2 PSIG IF THE SEAL OIL BACKUP PUMP ON THE RESERVIOR IS NOT AVAILABLE.
TO PLACE EQUIPHENT IN OPERATION-SET VALVES AS INDICATED.
START AIR SIDE SEAL OIL PUMP AND FILL DEFOAHING TANKS AND HYDROGEN SIDE DRAIN REGULATOR. START HYDROGEN SIDE SEAL OIL PUHP.
EQUIP-MENT IS THEN IN NORMAL OPERATION.
LJI\\JIT 2 DIABLO CANYON POWER PLANT - PG&E CO.
TURBINE AND GENERATOR ASSOCIATED SYSTEMS DRAWl1JG SHEET PAGE REV 08022 0 40 E
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