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Murphy A900 Series manuel d'utilisation

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Table des matières du manuel d’utilisation

  • Page 1

    SERIES A900 MURPHYMA TIC ® GENERA TOR ENGINE CONTROL SYSTEM DESIGN, INST ALLA TION AND OPERA TING MANUAL A900-9025N Revised 10-99 Section 40 (00-02-0197)[...]

  • Page 2

    WARNING BEFORE BEGINNING INST ALLA TION OF THIS MURPHY PRODUCT ✔ Disconnect all electrical power to the machine. ✔ Make sure the machine cannot operate during installation. ✔ Follow all safety warnings of the machine manufacturer . ✔ Read and follow all installation instructions. Cer tain danger to human safety and to equipment may occur if[...]

  • Page 3

    T able of Contents Section 1: Introduction page 1 1-1 System 1 1-2 Models 1 1-3 Purpose 1 1-4 Definitions 1 1-5 How T o Use This Manual 1 Section 2: Specifications 1 2-1 Enclosure T ype 1 2-2 Power Requirements 1 2-3 Input Ratings 1 2-4 Output Ratings 1 2-5 Field Wiring Connections 1 2-6 Operating T emperature 1 Section 3: Model Identification 1 3-[...]

  • Page 4

    Section 1: Introduction 1-1 System. 1-1.1 The MURPHYMA TIC ® Generator Engine Control System, Series A900 is designed to meet the requirements of the engine control, shutdown and alarm section of NFP A-1 10 “Emer gency And Standby Power Systems” specification. The controller also meets the minimum requirements of NFP A99 “Health Care Facilit[...]

  • Page 5

    an automatic-start, two-cycle, engine-driven generator , and include the shutdown and alarm points recommended in NFP A- 1 10-1988 “Emer gency and Standby Generator Systems” for Level 1 installations. These controllers also meet or exceed the minimum requirements of NFP A-99-1990 “Health Care Facilities” and with the addition of a Low W ate[...]

  • Page 6

    T able 3-1.7 3 Level 1 C.V . S L.A. R.A. R.V . Level 2 C.V . S L.A. R.A. R.V . NFP A-1 10 NFP A99 C.V . S L.A. R.A. R.V . ② CAN/CSA C282-M89 C.V . S L.A. R.A. R.V . A901 C.V . S L.A. R.A. R.V . A902 C.V . S L.A. R.A. R.V . ④ ④ A903 C.V . S L.A. R.A. R.V . ④ ④ a. Overcrank X X X X X X X X O O X X X X X X X X X X X X X X X X X X O O X X X O[...]

  • Page 7

    (d) Overcrank circuit; will stop automatic cranking and indicate overcrank if engine fails to start after 3 attempts. The number of cranks are selectable for 1, 2, 3, 4 or 5 cycles before shutdown. The overcrank circuit may also be turned off so no overcrank shutdown occurs. (e) Shutdown T ime Delay Bypass; this delay prevents the oil pressure, wat[...]

  • Page 8

    energize the battery char ging alternator field. 3-2.2.2 Shutdown Relay; this relay is operated by the shutdown circuits of the Control / Display Module and provides an output that can be used to trip the generator circuit breaker on an emergency shutdown. 3-2.2.3 Local Audible Alarm Relay; provides a contact closure to operate a local audible alar[...]

  • Page 9

    (f) Overspeed Speed Switch; 1. Provides a signal to the overspeed shutdown circuit if the engine exceeds the preset speed. The factory setting is approximately 3894 Hz, or 1980 RPM on an engine with 1 18 teeth on the flywheel ring gear . The adjustment range is 300 Hz to 10,000 Hz. 2. A push to test switch is provided to allow testing of the oversp[...]

  • Page 10

    7 to operate a local audible alarm as required by NFP A- 110, Level 1 and Level 2. 3-3.2.5 Remote Audible Alarm Relay; provides a contact closure to operate a remote audible alarm as required by NFP A- 1 10, Level 1. 3-3.2.6 Remote V isual Alarm Relay; provides a contact closure to operate a remote visual alarm as required by NFP A- 1 10, Level 1. [...]

  • Page 11

    8 setting until the overspeed trips. When switch is released, the set point will be 10% above normal running speed. This is the method used to make the factory setting. W ith engine speed at 1800 RPM or 3540 Hz. (g) Cooldown circuit; this circuit keeps the engine running for five minutes after the transfer switch has removed the load from the gener[...]

  • Page 12

    9 (c) TEST ; turns on the engine controls and shutdown circuits. A start signal is applied to the automatic control and the engine start sequence begins. 3-5.1.2 Lamp T est Pushbutton: T ests the lights on the A- 902-2 module. 3-5.1.3 The A902-2 SELECTRONIC ® Control Module includes the following engine control features: (a) Cycle crank circuit; w[...]

  • Page 13

    of cause of alarm. These circuits activate the alarm relay . Alarm circuits are active as long as power is applied to the A902-2. All are active when the engine is running, shutdown or on standby . T wo (2) Amber Alarm Indicating Lights are provided. (a) Low W ater T emperature; operated by low water temperature SWICHGAGE ® . (b) Air Damper Closed[...]

  • Page 14

    3-6.1.2 Lamp T est Pushbutton: T ests the lights on the A903 module. 3-6.1.3 Alarm Silence Pushbutton: T urns of f any audible alarm that is connected to the Local or Remote Audible Alarm Relays. The indicating light will remain on as long as the condition exists. If the Alarm Silence pushbutton is not operated, the audible alarm will turn off when[...]

  • Page 15

    (h) #8 Spare Alarm; operated by an external switch. This circuit is provided for an additional alarm that may be required by the user . (i) #9 Spare Alarm; operated by an external switch. This circuit is provided for an additional alarm that may be required by the user . 3-6.2 Relay Module. The Relay Module, figure 3-6.2, includes all of the contro[...]

  • Page 16

    audible alarm will turn off when the alarm contact clears. 3-7.1.4 The A903-2 SELECTRONIC ® Control Module includes the following engine control features: (a) Cycle crank circuit; will crank the engine for 15 seconds then rest for 15 seconds until the engine starts. The crank/rest time is selectable for either 10, 15, 20, 25 or 30 seconds. If the [...]

  • Page 17

    make up the generator engine control. Relays are available for operation on either 12 or 24 volt battery systems. Four (4) relays are included for: 3-7.2.1 Fuel Relay; this relay provides two outputs, one to energize the engine fuel solenoid and a separate circuit to energize the battery char ging alternator field. 3-7.2.2 Shutdown Relay; this rela[...]

  • Page 18

    5-1/2 in. (140 mm) 3-3/4 in. (95 mm) 3/16 in. (5 mm) dia. 4 places 5-5/8 in. (143 mm) 2-13/16 in. (71 mm) 3 in. (76 mm) 3-3/8 in. (86 mm) 6-3/4 in. (171 mm) 9-3/8 in. (238 mm) 6 in. (152 mm) 4-15/32 in. (114 mm) Mounting Holes 1/8 in. (3 mm) diameter 1-1/2 in. (38 mm) clearance 5 in. (127 mm) maximum between A-900 Series module & relay module w[...]

  • Page 19

    15 26 4 27 28 4 29 30 31 32 33 34 47 48 49 50 51 52 B+ OUT HOURMETER B- MANUAL START START PICKUP PICKUP OIL PRESSURE LO WATER TEMP. HI WATER TEMP. REMOTE S.D. SPARE ALARM 35 36 37 38 39 40 41 42 43 44 45 46 ALARM SILENCE AUDIBLE ALARM OVERCRANK OVERSPEED OIL PRESSURE HI WATER TEMP. REMOTE SHUTDOWN SPARE SHUTDOWN LOSS OF SPEED LO WATER TEMP. SPARE [...]

  • Page 20

    Figure 4-2.3.2: A902 wiring 15 26 4 27 28 4 29 30 31 32 33 34 B+ OUT HOURMETER B- MANUAL START START PICKUP PICKUP OIL PRESSURE LO WATER TEMP. HI WATER TEMP. REMOTE S.D. SPARE ALARM 35 36 37 38 39 40 41 42 43 44 45 46 ALARM SILENCE AUDIBLE ALARM OVERCRANK OVERSPEED OIL PRESSURE HI WATER TEMP. REMOTE SHUTDOWN SPARE SHUTDOWN LOSS OF SPEED LO WATER TE[...]

  • Page 21

    Figure 4-2.3.3: A903 wiring 15 26 4 27 28 4 29 30 31 32 33 34 47 48 49 50 51 52 B+ OUT HOURMETER B- MANUAL START START PICKUP PICKUP OIL PRESSURE LO WATER TEMP. HI WATER TEMP. REMOTE S.D. SPARE ALARM 35 36 37 38 39 40 41 42 43 44 45 46 ALARM SILENCE AUDIBLE ALARM OVERCRANK OVERSPEED OIL PRESSURE HI WATER TEMP. REMOTE SHUTDOWN SPARE SHUTDOWN LOSS OF[...]

  • Page 22

    current rating that is equal to or greater than the forward current that the coil draws to operate. For example, a relay less than 1 A, use a 1 A diode since they are readily available. The wiring shown in Figures 4-2.3.1, 4-2.3.2 and 4-2.3.3 have examples of the places that a reverse diode is required. 4-3 Crank Disconnect. 4-3.1 A magnetic pickup[...]

  • Page 23

    6. While engine is cranking, turn crank disconnect adjustment counter clockwise slowly until “ Crank Disconnect Speed ” light turns on and cranking stops. 7. T urn crank disconnect adjustment clockwise 1/4 turn. This sets crank disconnect speed at approximately 125 RPM above cranking speed. 8. T urn Mode Selector switch OFF . (f) Reconnect the [...]

  • Page 24

    (c) “ W ater T emperature ” light will come on and engine will stop. (d) T urn Mode Selector switch OFF . 4-4.9 Low W ater T emperature; to test the low water temperature alarm circuit: (a) Engine does not have to be running. (b) Use a jumper wire and short from terminal 31 to 4. (c) “ Low W ater T emperature ” alarm light will come on as l[...]

  • Page 25

    T able 7-2.1 22 Mode Selector OFF Mode Selector AUTO Stand-by Mode Selector AUTO Cranking Mode Selector AUTO Running Mode Selector AUTO Shutdown Input V oltage Input V oltage Input V oltage Input V oltage Input V oltage 13.8 27.6 13.8 27.6 13.8 27.6 13.8 27.6 13.8 27.6 1 13.8 27.6 13.8 27.6 13.8 27.6 13.8 27.6 13.8 27.6 4 0 00 00 0 00 0 0 5 13.8 27[...]

  • Page 26

    to the table for examples. (c) V oltages less than battery also may vary due to tolerances of the electronic components in the A900. Minor variations, 1 or 2 volts, normally will have no effect on the A900 operation. (d) The AC voltage at terminal 29 must be a minimum of 2 V AC to drive the speed sensing circuits of the A900. 7-2.2 W ith power appl[...]

  • Page 27

    local audible (K-4) terminal 20 and 21, remote audible (K-5) terminal 22 and 23 and remote visual (K- 6) terminal 24 and 25 close to operate the alarm devices wired to them. 7-3.3 An alarm silence pushbutton is wired between terminal 35 and ground. This switch is provided on the A901 and can be externally connected on the A902 series. When this swi[...]

  • Page 28

    0690040 CONTROL SYSTEMS & SER VICES DIVISION P .O. Box 1819; Rosenberg, Texas 77471; USA (281) 342-0297 fax (281) 341-6006 e-mail sales@fwmurphy .com MURPHY DE MEXICO, S.A. DE C.V . Blvd. Antonio Rocha Cordero 300, Fracción del Aguaje San Luis Potosí, S.L.P .; México 78384 +52-48-206264 fax + 52-48-206336 e-mail ventasmex@murphymex.com.mx FR[...]