Installation and operating instruction
Gas condensing unit WTC-GB 15-B Compact and WTC-GB 25-B Compact
9 Servicing
83309302 1/2018-05 La
122-196
9.1.3 Removing and refitting burner surface
Observe notes on servicing [ch. 9.1.1].
Removing
Close gas isolating valve.
Unplug electrical connections
1
from gas combi valve and fan.
Undo union nut
2
.
Remove screw
4
on intake sound attenuator.
Remove disc nuts
5
on burner cover.
Remove burner cover.
Remove burner gasket
6
.
Remove burner surface
7
.
Clean burner surface
Clean burner surface if required:
Clean the front with a cloth.
If dust deposits are present, brush out the back using a soft brush to prevent
damaging the burner fleece.
Refitting
Refit burner surface in reverse order, and:
fit burner surface with recesses to the adjusting pins
8
and install it,
check burner gasket
6
for visible damage, replace if necessary,
fit burner cover, tighten disc nuts
5
evenly diagonally across (torque 4 Nm),
fit new gasket
3
to gas connection.
1
2
4
3
6
7
8
5
4 Nm