Viessmann B1HF Installation And Service Instructions Manual page 46

Commissioning, inspection, maintenance
Removing the burner
4x
F
D
C
B
Fig. 30
1. Turn off the ON/OFF switch.
2. Close the gas shut-off valve and safeguard against
reopening.
3. Disconnect cables and leads from:
■ Fan motor (2 plugs)
A
■ Ionisation electrode
Ignition unit
■ C
■ Earth D
46
(cont.)
E
A
B
4. Undo gas supply pipe fitting
5. Undo 4 screws and remove the burner.
F
Note
Cover gas connection
can fall into it.
.
E
so that no small parts
E