zxc ® 26-Mar-2013 09:43

GRAVINER Mk 6 OIL MIST DETECTOR / INSTALLATION, OPERATION AND MAINTENANCE MANUAL 59812-120


Year: 2005
Language: english
Author: Kidde Fire Protection Services Ltd
Genre: INSTALLATION, OPERATION AND MAINTENANCE MANUAL
Publisher: Kidde Fire Protection Services Ltd
Series: 59812-120-1
Format: PDF
Quality: eBook
Number of pages: 90
Description: High temperatures, in excess of 200°C that occur on bearing surfaces under initial failure conditions,
can lead to a rapid generation of oil vapour. When the hot vapour contacts the relatively cooler
atmosphere of the crankcase it condenses into a fine mist, with typical particle sizes of around 0.5 to 5
microns in diameter. When the density of these particles reaches between 30 to 50 mg/l (Milligrams
per litre), depending upon the type of oil, an explosive condition exists.
Figure 1: Engine Areas of Failure
A fire or explosion needs three constituents: fuel, oxygen and an ignition source. Remove one of these
and no explosion will occur. Similarly, within the crankcase, the three constituents which could cause
an explosion are air, oil mist and an ignition source, the "hot spot". Using optical measuring
techniques, oil mist density can be measured at levels as low as 0.05 mg/l and give early warning of a
rise in oil mist density.
DESCRIPTION AND OPERATION
Oil Mist Detection (OMD) techniques have been used to monitor diesel engine crankcases for potential
explosive conditions and early detection of bearing failures. The systems available rely mainly on
analysing the optical density of oil mist samples drawn from the crankcase compartments, through
pipes to the detector. While these systems proved successful in the past, engine design has improved
significantly over the years and oil mist detection techniques have improved substantially to maintain
adequate protection.
DESCRIPTION
The system comprises three main components (refer to Figure 3):
Detectors
Engine Junction Boxes
Control Unit
The Graviner Mk 6 OMD system can comprise up to 64 detectors directly mounted on the crankcases
of up to 8 engines, allowing both main propulsion and auxiliary generators to be monitored at the same
time.
Each detector communicates electronically over a serial data link via the engine mounted junction box
with the control/display unit which is designed to be mounted within the Engine Control Room. This
eliminates the need to enter the machinery space in alarm conditions.
SOVC 5272/73/74/75
01. M/E PNEUMATIC CONTROL SYSTEM
02. M/E WIRING DIAGRAM WITH CABLE ROUTE PLAN
03. OIL MIST DETECTOR (GRAVINER MARK 6)
04. STARTER FOR AUX. BLOWER & TURNING GEAR MOTOR
05. MOTOR FOR AUX. BLOWER & TURNING GEAR
06. TEMPERATURE TRANSMITTER & SWITCH
07. PRESS TRANSMITTER & SWITCH
08. P.C.O. NON - FLOW SWITCH
09. FUEL OIL LEAKAGE LEVEL SWITCH
10. AIR COOLER WATER LEVEL SWITCH
11. TURBOCHARGER TACHOMETER
12. BERAING TEMPERATURE SENSORS
13. AXIAL VIBRATION MONITORING
14. LEVEL SWITCHES FOR HYDRAULIC SYSTEM
15. REMOTE CONTROL SYSTEM
GRAVINER Mk 6 OIL MIST DETECTOR / INSTALLATION, OPERATION AND MAINTENANCE MANUAL
59812-120-1

TABLE OF CONTENTS

Chapter Page
1. DESCRIPTION AND OPERATION 1
1.1 INTRODUCTION 1
1.2 DESCRIPTION 3
1.3 TECHNICAL SPECIFICATION 3
1.4 OPERATION 5
1.5 SYSTEM CONTROLS AND DISPLAYS 6
2. INSTALLATION AND COMMISSIONING 9
2.1 INSTALLATION 9
2.2 SYSTEM CHECKS PRIOR TO SWITCHING ON 28
2.3 SYSTEM CONFIGURATION AND COMMISSIONING 29
2.4 SYSTEM OPERATION 33
2.5 TEST MENU 35
2.6 EVENT LOG 40
2.7 ENGINEER & USER MENU FLOWCHARTS 44
3. MAINTENANCE 55
3.1 ROUTINE MAINTENANCE 55
3.2 DETECTOR HEAD REPLACEMENT 55
3.3 DETECTOR HEAD REFURBISHMENT 56
3.4 FAN REPLACEMENT 59
3.5 CABLE REPLACEMENT 59
3.6 CONTROL UNIT PCBs 60
3.7 REPLACEMENT OF 8 ENGINE STATUS DISPLAY MEMBRANE 62
3.8 REPLACEMENT OF LCD DISPLAY 63
3.9 REPLACEMENT OF LCD DISPLAY MEMBRANE 63
3.10 DECOMMISSIONING 63
4. FAULT FINDING 69
4.1 GENERAL 69
5. SPARE PARTS 77
LIST OF ILLUSTRATIONS
Figure Title Page
1 Engine Areas of Failure 1
2 Graviner Mk 6 OMD Main Components 2
3 Typical System Congiguration 3
4 Panel Display 6
5 Relay Function Modes 8
6 Installation Drawing for Graviner Mk 6 OMD Control Unit Bulkhead Mounting 9
7 Installation Drawing for Graviner Mk 6 OMD Control Unit Flush Mount 10
8 Installation Drawing for Graviner Mk 6 OMD Control Unit Flush Mount Panel
9 Interface PCB 36
10 Control Unit Interface Board 12
11 Power Input Cable Earth Stud 13
12 Graviner Mk 6 OMD System E9261-002 (Sheet 1 of 3) 14
13 Typical Mounting Position 17
14 Graviner Mk 6 OMD Detector Head Installation E3561-301 18
15 Detector Head E3561-301 19
16 Detector Cable Assemblies 20
17 Detector Cable Assemblies 21
18 Junction Box Cable Gland Components 22
19 Junction Box Cable Gland Components with Detector Cable 22
20 Junction Box Cable Gland Components in Order of Fitting to Cable 22
21 Junction Box Cable Gland Components Fitted to Detector Cable and
22 Junction Box Installation 24
23 Cable Screen Terminations 25
24 Engine Connection Details (Sheet 1 of 2) 26
25 Junction Box External Connections Label 28
26 Smoke Detector 31
27 Smoke Test 31
28 Hyperterminal Screen 41
28 Connection Description Screen 41
30 COM1 Properties Screen 42
31 Hyperterminal Screen 43
32 Event Log Connector Location 44
33 Base Fixing Screw Removal 56
34 Cable Disconnect 56
35 Screw Removal 57
36 Base Moulding Seal 57
37 Pulling Tool 57
38 Fan Removal 58
39 Cleaning Light Guide 58
40 Control Unit PCB’s 61
41 Control Unit PCB’s 61
42 Interface PCB 64
43 Main Control Processor PCB 65
44 Eight Engine Status Display PCB 66
45 Status Display PCB 66
46 Junction Box PCB 67
47 Junction Box - D4720-001-xx 76
48 Detector Head E3561-301 77
49 Graviner Mk 6 OMD Control Unit 78
REVISION HISTORY
Revision Date Details
Intentionally Blank
 
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Rating: 4.8 / 5 (Votes: 11)
Reply
Devendra Vegad 15-Dec-2014 21:52
Dear Sir,
We are Trading All Type of New and Used Oil MIst Detector Mark 5 / 6 from Ship Breaking Yards. We are Give You All Parts Are Originals and Serviced.So, Than If You are Intrested Too Please Contact Us.
0
Reply
GOOGLE BOT 15-Dec-2014 21:52
 
mvfjord 18-Apr-2016 18:19
Dear Sir,
I need help. Every 24 hours, our Graviner MK6 OMD has Back Up Fault alarm.
Any advise would be appreciated. Thank you very much.
0
Reply

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