4.2 Adjusting combustion head (GP)
A542E ver. 3
1
Ignition gas nozzle
2
Ignition electrodes
3
Diffuser disc
Pos.
inch
Pos.
inch
A
0.91
D
1.54
B
0.35
E
0.14
C
2.44
Modification of gas nozzles for FGR, when required burning conditions are not
met. If the problem persists, proceed to the next step.
1. Remove all the primary nozzles (øZ1 and øZ2) and test the burner.
2. Replace the secondary gas nozzles [X] and [Y] with new nozzles (in the cardboard
box). Test the burner.
3. Add adjusting bands and test the burner. You must order the adjusting bands
separately from Oilon.
4.3 Adjusting combustion differential air pressure switch
Combustion differential air pressure switch
The combustion differential air pressure switch monitors pressure difference generated
by burner fan.
M4263 2206EN
33 (102)
