16
Burner cleaning
Boiler (See
Fig. 1.16
and
Fig. 1.17
)
Ensure isolation of electricity and gas supply. Remove plinth
3 screws (See
Fig. 1.9
).
Disconnect ignitor lead
C
and flame detector lead
D
from the
electronic ignition unit.
Lift up electronic ignition unit
J
to release unit from gas valve.
Undo union nut
K
. Undo four screws
L
.
Allow burner assembly to drop down and slide forwards on
rails, then lift and remove burner assembly from unit.
See
Fig. 1.18
Brush the boiler burner top and check the flame ports are
clear. Any deposits may be removed with a non-metallic
brush.
Remove three screws securing burner assembly to manifold
A
.
Remove two screws securing burner left handside support
B
.
Slide out burner element assembly.
Check the burner injectors, check the orifices and remove
any deposits from the injectors and burner venturi using a
suitable non-metallic brush.
Remove pilot injector. Clean any deposits by rinsing in warm
water or use a suitable brush.
DO NOT
attempt to push a
wire through the orifice.
DESN 512961
DESN 512962
DESN 512137 v 11-21
Fig. 1.16
Fig. 1.17
Fig. 1.18
B