Operating Precautions 
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<Contents> 
 
 
1 Outline of the Product ..................................................................................................... 2 
1-1. Preface ........................................................................................................................... 2 
1-2. Purpose of use ............................................................................................................... 2 
1-3. Definition of DANGER, WARNING, CAUTION, and NOTE ............................................ 2 
2 Important Notices on Safety............................................................................................ 3 
2-1. Danger cases ................................................................................................................. 3 
2-2. Warning cases................................................................................................................ 4 
2-3. Precautions..................................................................................................................... 5 
2-4. Safety information........................................................................................................... 6 
3 Product Components ...................................................................................................... 7
3-1. Gas detector and standard accessories ......................................................................... 7 
3-2. Names and functions for each part................................................................................. 8 
3-3. Block diagram................................................................................................................. 9 
4 How to Use...................................................................................................................... 10 
4-1. Before using the detector................................................................................................ 10 
4-2. Precautions for installation points ................................................................................... 10
4-3. Precautions for system designing................................................................................... 11 
4-4. How to install .................................................................................................................. 13 
4-5. How to wire..................................................................................................................... 14 
5 How to Operate ............................................................................................................... 19 
5-1. Preparation for start-up................................................................................................... 19 
5-2. Basic operating procedures............................................................................................ 19
5-3. How to start the detector ................................................................................................ 20 
5-4. Modes............................................................................................................................. 21 
5-5. User mode ...................................................................................................................... 22 
5-6. How to exit...................................................................................................................... 24 
6 Operations and Functions ............................................................................................... 25
6-1. Gas alarm activation....................................................................................................... 25 
6-2. Fault alarm activation ..................................................................................................... 26 
6-3. External output operation................................................................................................ 27 
6-4. Other functions ............................................................................................................... 28 
7 Maintenance.................................................................................................................... 29 
7-1. Maintenance intervals and items .................................................................................... 29 
7-2. Regular maintenance mode............................................................................................ 31 
7-3. Gas calibration method................................................................................................... 38 
7-4. Parts replacement .......................................................................................................... 41 
7-5. Expiration date of Japan Gas Appliances Inspection Association certification product... 41 
8 Storage, Relocation and Disposal ................................................................................... 42 
8-1. Procedures to store the detector or leave it for a long time ............................................ 42 
8-2. Procedures to relocate the detector or use it again ........................................................ 42 
8-3. Disposal of products ....................................................................................................... 42 
9 Troubleshooting............................................................................................................... 43 
10 Product Specifications .................................................................................................... 45 
10-1. List of specifications ........................................................................................................ 45 
10-2. List of accessories........................................................................................................... 48 
10-3. Detection principle........................................................................................................... 49 
11 Definition of Terms........................................................................................................... 51