Caution: This document contains mixed page sizes ... - Igor Chudov

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MOTE: ULES OTHERWISE 1I1)TED. ALL COIPONEWTS ARE SHOW IN THE ~M-EW~OZED msiiiow. ~~ . Mll CAUEE - OIL PRESS. 112 .EIUEE - WATER TEMP 113 AIIETER - CHARGE 5-0-5 , 111 RESISTW - 3.0HT. 101 $11 . SWITCH - PANEL LIGHT S12 SllTCH - SELECTOR SW SWITCH - UNI- 1111 BLOCK - TERMINAL I . mi BLOCK - TERIIMAL WM USED FIGURE 75. TYPICAL CONTROL SCHEMATIC, RADIATOR-COOLED J-SERIES DIESEL ENGINE 61
RADIATOR-COOLED DIESEL SETS The control components on the water-cooled, diesel sets are similar to the air-cooled and marine sets, but the circuitry and operating cycles are different. The solid-state control used on the DTNMDTA Series is described separately. The DC start and run circuits are supplied by the 12-volt battery, and by the battery charging system. Do not apply overvoltage to the starting cir- cult at any time. Overvoltage will destroy the glow plugs and air heater In two to three seconds. If it becomes necessary to use an additional source of power to start the unlt- use a 12-volt battery connected In parallel with the starting batteries. Prior to starting, check the fuel supply, engine oil level, and all battery connections for loose or broken wires. If an automatic demand control is in use, check for correct connections and make sure the selector switch is in Remote position. Figure 75 shows a typical schematic diagram for radiator cooled diesel sets described in the following Starting, Start-Disconnect and Stopping sequences. Starting Sequence The following sequence of electrical functions occur during the starting operation. Relay contact text references normally open (NO) and normally closed (NC) refer to position of contacts with the unit at rest (not energized). . With S12 in the Remote position, the operator can start the set from a remote location, or by an automatic demand control. In this position only is engine preheating controlled automatically by 20 second Time Delay Relay K17. Relay K17 is energized by B+ connected through the remote switch, and through S12 in the Remote position. Manual starting at the set involves the following sequence of electrical and mechanical functions: 1. For cold engine starting, the Pre-Heat Switch S13 is held in the Heat position for 30seconds if below 55°F (13OC); 60 seconds if below 55OF. This action energizes the Heater Relay K1 which connects B+ to the manifold and glow plug heaters HR1-5. After proper pre-heattime, Sl3is released and the start circuit energized (Step 2). , 2. The start circuit is completed when the selector switch is moved to the Run position. This action energizes Fuel Relay K11 via normally closed contacts K14 and K15 (Cranking Limiter and Emergency Shutdown Relays). When K11 contacts close, B+ energizes the following components. .62 Oil pressure meter M11. Water temperature meter M12. Fuel solenoid K3. Optional water solenoid K2 and fuel pump E3. Heater Relay K1 via NC contacts of Si3 and K13 (Start-Disconnect Relay). Starter RelayK16via K13and S12. (Relay K16 connects B+ to the B1 starter solenoid and Cranking Limiter Relay K14.) Start-Disconnect Sequence When engine reaches about 900 rpm, centrifugal switch S4 closes and energizes relays K12 and K13 (Oil Pressure and Start-Disconnect). The NC contacts of K13 opens the K16 Starter Relay circuit and starter.solenoid BI. Stopping Sequence Positioning selector switch S12 to Stop position dis- connects B+ voltage from the control circuits; there- by de-energizing all control components required to operate the engine in either Run or Remote con- dition. Emergency Shutdown Emergency Shutdown Relay K15 is controlled by any one of three switches: S1 low oil pressure, S2 high water temperature, and S3 overspeed. Contacts of K15 control two circuits: one normally closed set of K15 contacts controls the fuel solenoid relay coil to shut off the fuel supply to the engine; the other nor- mallyopensetclosestolightthe pilot lightandsetoff the emergency alarm whenever the emergency shutdown relay energizes. CONTROL OPERATION (DTNMDTA SERIES) Figures 76and 77show the PC board and DCcontrol' schematics for the solid state control. Relay contact text references normally open (NO) and normally closed (NC) refer to position of contacts with the unit at rest (not energized). Starting Sequence The start circuit is completed by switch S10 in the. Start position. This action energizes On/Off Relay K2 which puts B+atStopSolenoid KSand Fuel Pump El' (via contacts K2, K1 and J1-4). As K5 energizes, its NC contacts open and allow the Starter Pilot Relay K4 to energize (via contacts K2, K1, K3, J1-6, K6, P1-16 and K5 auxiliary coil to ground). The K4 contacts connect B+ to the Starter Motor Solenoid K and cranking begins.
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Caution: This document contains mix
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The following symbols in this manua
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FLOW CHART A. NO AC OUTPUT VOLTAGE
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STMT Check exciter stator winding p
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-1 Contact with high voltage can ca
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The preferred test is with a megger
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are given in Table 1 (lead length b
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L - Wiring Harness Check Stop engin
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T I I I I I I I - I I I I I I I I I
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GENERAL This manual contains troubl
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generator adapter. The brushless ex
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Is control panel field breaker CB21
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FLOW CHART D. AC OUTPUT VOLTAGE BUI
Page 29 and 30: GENERAL All of the following Adjust
Page 31 and 32: . FIGURE 6. MSHlNGTHEFiELD voltage
Page 33 and 34: MULTIMETER FIGURE 11. SCR VOLTAGE T
Page 35 and 36: TABLE 2 RESISTANCE VALUES FOR ROTOR
Page 37 and 38: VOLTAGE REGULATOR The line-voltage
Page 39 and 40: VI v2 v3 v4 - VI v2 v4 VI v2 \R v4
Page 41 and 42: START Is control panel field breake
Page 43 and 44: . FLOW CHART D. EXCITER FIELD BREAK
Page 45 and 46: GENERAL All of the following Adjust
Page 47 and 48: The winding schematic (Figure 25) s
Page 49 and 50: CONTACT ONE PROD TO EACE OF M E FIE
Page 51 and 52: [a1 RECONNECTION WIRE W12 Figure 36
Page 53 and 54: 1201240 VOLT, 1 PHASE, 60 HERTZ NAM
Page 55 and 56: ASSEMBLY 9. Torque down rotor-throu
Page 57 and 58: . Starting Watts ..................
Page 59 and 60: WIRING CONNECTIONS, 15-25 kW SINGLE
Page 61 and 62: PERIODIC SERVICE AND INSPECTION SER
Page 63 and 64: I I I I CYRZI-2 I 7821-1 I - I t I
Page 65 and 66: NOTE: For detailed troubleshooting
Page 67 and 68: 3. Removesix5/16x l-inch capscrewsa
Page 69 and 70: 4. Remove end bell by tapping upwar
Page 71 and 72: 9. Remove rotor and fan .by using a
Page 73 and 74: 14. If bearing, shaft, or oil seal
Page 75 and 76: AC .AMMETERS WATER TEMPERATURE GAU
Page 77 and 78: ENGINE CONTROL SYST.EM OPERATION De
Page 79: Umlt cranking 15 to 20reconds to co
Page 83 and 84: Start-Disconnect Sequence When cran
Page 85 and 86: a a W a 9 W z f 66 6 b w a 3 0 E
Page 87 and 88: START Does fuel transfer pump El an
Page 89 and 90: CONTROL COMPONENT CHECKOUT The foll
Page 91 and 92: WIRING DIAGRAMS The wiring and sche
Page 93 and 94: I I I L I I m 74
Page 95 and 96: I 1 ' t I I U
Page 97: IW I- CE o_ u) z I It I 3 w
Page 100 and 101: I I I I I I I I 3 $1 :I a 1 I I tl
Page 102 and 103: P 83
Page 104 and 105: - --1 I" .- I . I - 1 85
Page 106 and 107: 87 ~ " - .I \ e 6 a i- z 0 0 a E a
Page 108 and 109: I I I I I I I I I 7 6 Et 4 3 2 I RE
Page 111: Onan Corporation 1400 73rd Avenue N
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Caution: This document contains mixed page sizes ... - Igor Chudov

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