Replacing The Nozzle - Viessmann Vitoflame 300 VHG III Service Instructions Manual

Replacing the nozzle

Fig. 9
1. Remove the nozzle cover with mixer device and
A
2. Remove mixing assembly
B
3. Replace nozzle
4. Mount mixing facility
Commissioning, inspection, maintenance
slot it onto the burner casing with the blast tube
connection pointing upwards (service position).
This prevents the formation of bubbles in the blast
tube connection.
connection.
(counterhold to prevent the
B
blast tube connection from turning); during this
step prevent air bubbles from forming in the blast
tube connection.
Note
For the make and type of nozzle, see standard val-
ues for burner settings on page.
A :
■ Position the nozzle in the centre of the sensor
plate and note the distance between the sensor
plate and the nozzle (see page).
Accurately position the ignition electrodes in the
■
top centre (12 o'clock position).
from the blast tube
A
11