Riken Keiki GD-3EC, Technical Manual

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Contents
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Contents
1.
Product Overview ................................................................................................................................................. 5
1-1 Introduction .................................................................................................................................................. 5
1-2 Intended use and features .......................................................................................................................... 7
1-2-1 Models and Codes ........................................................................................................................... 7
1-2-2 Detection principles and detection target gases for individual models ........................................... 8
1-2-3 Product features ............................................................................................................................... 9
1-3 Usage zones and conditions ..................................................................................................................... 10
1-4 DANGER, WARNING, and NOTE ............................................................................................................ 11
2.
Important Safety Information .............................................................................................................................. 12
2-1 Danger information .................................................................................................................................... 12
2-2 Warning information .................................................................................................................................. 12
2-3 Caution information ................................................................................................................................... 13
2-4 Safety information ...................................................................................................................................... 14
3.
Product Configuration ......................................................................................................................................... 31
3-1 Main unit and accessories ......................................................................................................................... 31
3-1-1 Main unit (SD-3) ............................................................................................................................. 31
3-1-2 Main unit (SD-3SC) ........................................................................................................................ 32
3-1-3 Remote sensor head (GD-3) ......................................................................................................... 32
3-1-4 Standard accessories .................................................................................................................... 33
3-1-5 Optional accessories ...................................................................................................................... 34
3-2 Part names and functions ......................................................................................................................... 37
3-3 Block diagrams .......................................................................................................................................... 38
4.
Installation ........................................................................................................................................................... 40
4-1 Installation precautions .............................................................................................................................. 40
4-1-1 General installation information ..................................................................................................... 40
4-1-2 Restrictions regarding installation .................................................................................................. 41
4-2 System design precautions ....................................................................................................................... 45
4-2-1 Using a stable power supply .......................................................................................................... 45
4-2-2 Lightning strike protective measures ............................................................................................. 45
4-3 Providing maintenance space ................................................................................................................... 46
4-4 Main unit installation .................................................................................................................................. 48
4-4-1 Vertical pole mounting .................................................................................................................... 48
4-4-2 Wall mounting ................................................................................................................................. 49
4-4-3 Attaching protective cover .............................................................................................................. 50
4-4-4 Attaching sunshade cover ............................................................................................................. 52
4-5 Remote sensor head (GD-3) installation .................................................................................................. 54
4-5-1 Wall mounting ................................................................................................................................. 54
4-5-2 Duct mounting ................................................................................................................................ 54
4-6 Connecting the grounding terminal ........................................................................................................... 56
4-7 Connecting the power and signal cables .................................................................................................. 57
4-7-1 Main unit cable and device connectors ......................................................................................... 57
4-7-2 Connecting the power and signal cables to the main unit ............................................................ 59
4-7-3 Connecting the power and signal cables to the remote sensor head (GD-3) ....................................... 62
4-7-4 Connecting the main unit (SD-3SC) and remote sensor head (GD-3) ......................................... 65
4-7-5 Connecting cables to the terminal plate ........................................................................................ 70
4-8 Mounting the sensor .................................................................................................................................. 73
4-9 Alarm relay setting (option) ....................................................................................................................... 74
4-10 Mounting the splash guard ...................................................................................................................... 77