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SEQUENCE OF OPERATION
WHEN OPERATING CONTROL CLOSES, THE ELECTRIC SPARK AND PILOT VALVE ON EACH SIDE ARE
AUTOMATICALLY ENERGIZED. THE SENSING PROBE ON EACH OF THE PILOTS PROVES THE PRESENCE
OF THE PILOT FLAME. INTERNAL SWITCH ACTION IN EACH IGNITION MODULE DE-ENERGIZES THE SPARK
AND ENERGIZES THE MAIN GAS VALVES FOR ITS RESPECTIVE GAS TRAIN, STARTING MAIN BURNER
OPERATION. WHEN THE OPERATING CONTROL IS SATISFIED THE PILOT GAS VALVE AND MAIN GAS
VALVES FOR EACH GAS TRAIN ARE DE-ENERGIZED STOPPING BURNER OPERATION.
IN THE EVENT OF EXCESSIVE STEAM PRESSURE (STEAM BOILER) OR EXCESSIVE WATER TEMPERATURE
(WATER BOILER) THE HIGH LIMIT CONTROL WILL DE-ENERGIZE THE PILOT VALVES AND MAIN GAS VALVES
ON BOTH SIDES STOPPING BURNER OPERATION.
THE LOW WATER CUT-OFF WILL ALSO STOP BURNER OPERATION IF THE WATER LEVEL IN THE BOILER
SHOULD DROP BELOW THE LOWEST SAFE LEVEL.
SHOULD ONE OF THE PILOT FLAMES FAIL TO IGNITE OR BECOME EXTINGUISHED, THE MAIN GAS VALVES
CONTROLLED BY THAT PARTICULAR PILOT WOULD CLOSE STOPPING BURNER OPERATION ON THE
BURNERS SUPPLIED BY THAT GAS TRAIN. OPERATION OF THE BURNERS SUPPLIED BY THE SECOND GAS
TRAIN WOULD BE UNAFFECTED.
FIG. 45
LADDER WIRING DIAGRAM - 5015B THRU 5026B SECTION BOILERS
EI CONTROL SYSTEM
SecTiON iV - OPeRATiON (continued)
Содержание 5006B
Страница 10: ...10 Fig 6 ARRANGEMENT OF SECTIONS AND CANOPY S SECTION III INSTALLATION INSTRUCTIONS continued...
Страница 22: ...22 Fig 22 SECURING OF CANOPY DRAFTHOOD SECTION III INSTALLATION INSTRUCTIONS continued...
Страница 23: ...23 Fig 23 CANOPY DRAFTHOOD MOUNTING DIAGRAM SECTION III INSTALLATION INSTRUCTIONS continued...
Страница 29: ...29 Fig 28 MOUNTING ELEVATIONS OF M M 150 AND A 67M FLOAT LWCO SECTION III INSTALLATION INSTRUCTIONS continued...
Страница 51: ...51 Fig 46 wiring diagram 5006B THRU 5014B SECTION BOILERS OP CONTROL SYSTEM SECTION IV OPERATION continued...
Страница 53: ...53 Fig 47 wiring diagram 5015B THRU 5026B SECION BOILERS OP CONTROL SYSTEM SECTION IV OPERATION continued...
Страница 55: ...55 Fig 48 wiring diagram 5006B THRU 5014B SECTion BOILERS EP CONTROL SYSTEM SECTION IV OPERATION continued...
Страница 56: ...56 Fig 49 wiring diagram 5015B THRU 5026B SECTION BOILERS EP CONTROL SYSTEM SECTION IV OPERATION continued...
Страница 68: ...68 Fig 58 PILOT LOCATIONS SECTION V SERVICE continued...
Страница 72: ...72 SERVICE RECORD DATE SERVICE PERFORMED...
Страница 74: ...74 Fig 64 BASE PARTS 5006B Thru 5014B SECTION VI REPAIR PARTS continued...
Страница 76: ...76 Fig 65 BASE PARTS 5015B thru 5026B SECTION VI REPAIR PARTS continued...
Страница 78: ...78 Fig 66 INTEGRAL CANOPY DRAFTHOODS SECTIONS SECTION VI REPAIR PARTS continued...
Страница 82: ...82 Fig 67 JACKETS SECTION VI REPAIR PARTS continued...
Страница 102: ...102 Control assembly and mounting bracket OP EP CONTROL SYSTEMS SECTION VI REPAIR PARTS continued...
Страница 111: ...111 SERVICE RECORD DATE SERVICE PERFORMED...
Страница 112: ...112...