51
7.2 RS485 Addressing
An offset is added to the register addresses (see above) for each device, depending on their
position on the IR bus, i.e. the master’s offset is 0, the device to its right hand side has an
offset of 100, the one to its right 200 and so on.
Fig. 27
Master
Slave
IR Bus
RS485
Slave Slave Slave
IR address 1 2 3 4 5
RS485
offset
0 100 200 300 400
Note: Read the 'Safety information' in Section 1 before doing any maintenance.
Caution: Do not cover or obstruct the infrared beam between products.
No special servicing, preventative maintenance or inspection of the product is required.
During installation and maintenace, the rear of the product must be protected from
enviromental pollutants entering the product. Alternatively, the tasks can be performed in
a dry clean enviroment.
Level controls
Boiler water level controls and level alarms, however, do require testing and inspection.
General guidance is given in Health and Safety Executive Guidance Notes BG01 and
INDG436. For specific instructions for the Spirax Sarco system please see separate literature.
Cleaning instructions
Use a cloth dampened with tap / de-ionized water / isopropyl alcohol. Use of other cleaning
materials could damage the product and invalidate the warranty.
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