Table Of Contents - Crowcon IRmax Installation, Operating And Maintenance Instructions

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Contents
Concept and safety ...................................................................................... 1
IRmax concept ..................................................................................... 1
Safety information................................................................................. 2
Product overview................................................................................... 3
1. Introduction ............................................................................................. 4
1.1 General ........................................................................................... 4
1.2 Product description ......................................................................... 4
2. Installation ................................................................................................ 6
WARNING ............................................................................................. 6
2.1 Location .......................................................................................... 6
2.2 Mounting ........................................................................................ 7
2.3 Cabling directly to IRmax .............................................................. 7
2.3.1 Terminal designation .............................................................. 8
2.3.2 Installing IRmax using a mounting bracket ............................ 8
2.4 Installing using a spigot gland and auxiliary junction box ................ 9
2.4.1 To fit IRmax to an auxiliary junction box: ............................. 10
2.5 Cabling requirement ..................................................................... 10
2.6 Connections and settings .............................................................. 11
3. Operation ............................................................................................... 12
3.1 Commissioning procedure ............................................................. 12
3.2 Routine maintenance .................................................................... 13
3.3 Changing gas types ...................................................................... 13
3.4 Relative responses of gas types ..................................................... 14
4. Specification ........................................................................................... 15
5. Accessories and spare parts .................................................................... 16
6. Fault finding .......................................................................................... 17
6.1 Errors signalled by LED .................................................................. 17
6.2 Analogue Output .......................................................................... 17
7. RS485 Modbus configuration ................................................................. 18
7.1 General ......................................................................................... 18
7.2 Wiring topology ............................................................................ 19
7.2.1 Star connection .................................................................... 19
7.2.2 Linear bus connection .......................................................... 19
7.3 Cabling requirements .................................................................... 20
7.3.1 Calculating the minimum level of power required ............... 20
7.3.2 Sample calculation ............................................................... 20
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