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MC-9142N
Revised 12-00
Section 40
(00-02-0202)
®
SERIES MC-900 MURPHYMATIC
MANUAL GENERATOR
ENGINE CONTROL SYSTEM
DESIGN, INSTALLATION
AND OPERATING MANUAL
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Table of Contents Section 1: Introduction page 1 1-1 System ............................................................................................................................................... 1 1-2 Models ............................................................................................................................................... 1 1-3 Purpose .............................................................................................................................
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Section 1: Introduction Section 2: Specifications 1-1 System. 2-1 Enclosure Type. ® 1-1.1 The MURPHYMATIC Manual Generator Engine 2-1.1 The MC-900 Series enclosure is designed to be mounted Control System, Series MC-900 is designed to meet the in a standard electrical enclosure for indoor use. requirements of the engine control and shutdown for manual 2-1.2 The MC-900 Series shares the same enclosure as the A- start generator engines. 900 automatic start controller so they can be used By comb
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3-2 MC-900. position. This same delay can also lock out all other 3-2.1 Control / Display Module. The Control / Display shutdown circuits except Overspeed and Overcrank. Module, figure 3-2.1, includes the control and test switches, The user may select which circuits are locked out by the ® the solid state logic elements and shutdown TATTLETALE time delay bypass. lights that make up the generator engine control for a four (c) Overspeed Speed Switch; cycle engine. 1. Provides a signal to the
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shutdown. This relay provides an output to trip an air shut off solenoid to close the air damper on a two cycle engine. 3-2.3 Status Signal; The relay module also includes an output J1 J2 WARNING For continued protection against that can be used with external circuits for signaling or control TB1 TB2 fire & shock hazard, replace only with same type fuse & rating. 1 15 functions. 3AMP Fuse 4 4 5 16 3-2.3.1 The Run signal at terminal 17 is on (closed to 6 17 RH2V2 RH2V2 negative) as long as the
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Figure 4-1.2: Dimensions 6 in. (152 mm) 3 in. (76 mm) 2-13/16 in. (71 mm) 5-5/8 in. (143 mm) 1-1/2 in. (38 mm) clearance Mounting Holes 1/8 in. (3 mm) diameter 1-1/2 in. (38 mm) 6-3/4 in. clearance (171 mm) 3-3/8 in. (86 mm) 4-15/32 in. (114 mm) 9-3/8 in. (238 mm) 5 in. (127 mm) maximum between MC-900 and relay module 3/16 in. NOTE: (5 mm) dia. Clearance 4 places required for wire run. 5-1/2 in. (140 mm) 1-7/8 in. (48 mm) clearance 3-3/4 in. (95 mm) 1-7/8 in. (48 mm) clearance 4
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Figure 4-2.3.1: MC-900 wiring Hourmeter Voltmeter B+ Input Output +– + – Barrier Barrier MANUAL START Terminal Terminal MODULE Blocks Blocks 15 FUSE B+ OUT OVERCRANK LIGHT OUTPUT 35 26 B– TO HOURMETER OVERSPEED LIGHT OUTPUT 36 4 B GROUND LOW OIL PRESS. LIGHT OUTPUT 37 27 MAGNETIC PICKUP HIGH WATER TEMP. LIGHT O/P 38 28 LOW OIL PRESS. SPARE #1 LIGHT OUTPUT 39 4 GROUND SPARE #2 LIGHT OUTPUT 40 29 HIGH WATER TEMP. 41 30 SPARE #1 SHUTDOWN INPUT 42 31 SPARE #2 SHUTDOWN INPUT SPARE #3 LIGHT OUTPUT 43
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Figure 4-2.3.2: MC-900-2 wiring Hourmeter Voltmeter B+ Input Output +– + – Barrier Barrier MANUAL START Terminal Terminal MODULE Blocks Blocks 15 FUSE B+ OUT OVERCRANK LIGHT OUTPUT 35 26 B– TO HOURMETER OVERSPEED LIGHT OUTPUT 36 4 B GROUND LOW OIL PRESS. LIGHT OUTPUT 37 27 MAGNETIC PICKUP HIGH WATER TEMP. LIGHT O/P 38 28 LOW OIL PRESS. SPARE #1 LIGHT OUTPUT 39 4 GROUND SPARE #2 LIGHT OUTPUT 40 29 HIGH WATER TEMP. 41 30 SPARE #1 SHUTDOWN INPUT 42 31 SPARE #2 SHUTDOWN INPUT SPARE #3 LIGHT OUTPUT 4
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across the coil to suppress reverse voltage that is generated 4-4.1.2 All of the adjustments and controls shown in Table 4- whenever the inductive load is de-energized. This will protect 4.1 are located on the rear of the control/display module. See the electronic components in the MC-900 and should prevent Figure 4-4.1.2. Each light and switch is labeled for ease of operating malfunction due to noise. The “rule of thumb” for identification. The LED’s are supplied as an aid in installation sizi
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been adjusted for proper running speed, turn Mode the engine by turning the Mode Selector switch to RUN Selector switch OFF. position. (e) All lights on the back of the MC-900 should go off and (c) To test other shutdowns, a jumper wire can be used to short the engine stop. If engine does not stop, check run the input terminal for that circuit, to ground, terminal 4. solenoid to be sure it has returned to the stop position. 4-4.3 Overspeed Switch Setting; To set the speed switch, Section 5:
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7-1.2 Other tools which may be required are: 7-2.3 With the Mode Selector switch in the RUN position, six of ® 7-1.2.l AC/DC Voltmeter for taking voltage readings and an the eight shutdown TATTLETALE circuits are activated and Ohmmeter for testing resistance of wires and connections. will operate anytime a switch closes from ground to their inputs. 7-1.2.2 Jumper wires with alligator clips to bypass or simulate Circuit Input Output circuit closures. (a) Oil Pressure Terminal 28 Terminal 37 DO N
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Table 7-2.1 Mode Mode Selector Mode Selector Mode Selector Selector START RUN RUN OFF Cranking Running Shutdown Input Voltage Input Voltage Input Voltage Input Voltage Terminal 13.8 27.6 13.8 27.6 13.8 27.6 13.8 27.6 Number 1 13.8 27.6 13.8 27.6 13.8 27.6 13.8 27.6 4 0 00 00 0 0 0 5 13.8 27.6 0 0 0 0 13.8 27.6 6 0 0 13.8 27.6 13.8 27.6 0 0 7 0 00 00 0 0 0 8 0 00 00 0 0 0 9 0 00 00 0 0 0 10 0 0 0 0 0 0 13.8 27.6 11 00 0 0 000 0 12 00 0 0 000 0 13 00 0 0 000 0 14 00 0 0 000 0 15 13.8 27.6 13.8 27.
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R E G I S Section 8: Replacement Parts 8-1 Replacement Parts 8-1.1 Table 8-1 covers all of the replaceable components of 8-2 Replacement Parts Waukesha Modules the MC-900 Series Generator Engine Controls. The part 8-2.1 Table 8-2 part numbers are Murphy part numbers for numbers shown are Frank W. Murphy Mfr. part numbers and MC-900 controls manufactured for Waukesha Corporation. may not appear on the individual parts. These OEM parts are available only to Waukesha and their 8-1.2 Each complet
