The maximum constructional gaps (I
c
) of the cylindrical flamepaths are less than that
required by Table 2 of EN 60079-1:2004 are as detailed below:
Flamepath Maximum
Gap (mm)
Between the tilt centre bore and tilt bearing housing shaft (2 off) 0.089
Between the yoke arm bore and tilt resolver shaft. 0.061
Between the yoke arm bore and yoke arm blanking cap shaft. 0.061
Between the yoke arm bore and yoke spigot shaft 0.061
Between the pan body top bore and yoke spigot shaft (2 off) 0.061
Between the upper cover bore and wiper motor mount shaft. 0.060
Between the wiper motor mount bore and base flange shaft. 0.100
The pan body to pan body top are to be secured with cap head M5 - 0.8 x 10 mm long S316
stainless steel grade A4/70 special fasteners.
All exposed parts: Aluminium (BS-EN755 1997 6082T6)
Stainless Steel (BS-EN10088 No.1.4404)
If the equipment is likely to come into contact with aggressive substances, then it is the
responsibility of the user to take suitable precautions that prevent it from being adversely
affected, thus ensuring that the type of protection provided by the equipment is not
compromised.
Aggressive substances: e.g. acidic liquids or gases that may attack metals, or solvents that
may affect polymeric materials.
Suitable precautions: e.g. regular checks as part of routine inspections or establishing
from the material’s data sheets that it is resistant to specific
chemicals.
Units must carry the following certification marking.
SIRA05ATEX1300X Exd IIC Ta –20 +60
The unit shall only be installed and brought into service using the operating parameters
defined in these instructions and in the technical specifications see page 22
MIC1-440 Instruction Manual Page 4 of 43 Issue 2
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