Installation and operating instruction
Oil condensing boiler WTC-OB 18-B
9 Servicing
83311002 1/2018-03 La
78-132
9.6 Set nozzle distance
Observe notes on servicing [ch. 9.1].
The nozzle distance must be set to 2.5 mm.
Place burner into service position A [ch. 9.4.1].
Insert setting gauge and check dimension A (2.5 mm).
If the value measured deviates from dimension A:
Undo screw
1
on the guide tube and screw
2
on the mixing head.
Set nozzle distance by moving the nozzle body, whereby the mixing head must
touch the guide tube.
Tighten screws
1
and
2
.
2.25B
2,5
1.22B 1.23B
1.17B 1.19B
2,5 mm
1
2
9.7 Check mixing head
The correct installation of the mixing head can be checked using the indicating bolt.
Check indicating bolt
1
.
If the indicating bolt is flush with the burner housing, the mixing head has been
installed correctly.
1