40
5 Commissioning
Connection Design C to external housing
Fig. 5-14 Connection Design C to external housing Ex-Zone I
Design C: Electrically connect the pilot burner
DANGER!
High voltage on the bare ignition electrode!
Pilot burner is only permitted to be operated with correct earthing.
With version C in particular there is a danger of death when removing or omitting the earth-
ing, the housing earthing must be connected directly to the ignition transformer earthing!
In the event of damage to the earthing insulation, the device should be shut down; further
operation without repair is not permitted.
Connect the pilot burner
cables as follows
Fig. 5-15 Connect pilot burner version C
No. Wire colour Function
1 bl Phase
2 bl Neutral conductor
3 bl Ignition transformer N
TR
-N
4 bl Ignition transformer L
TR
-L
5 bl COM
6 bl NO
PE gn/ye Protective conductor
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General