wallas 26CC, Installation Manual, Page: 55 / 124

Maintenance
Maintenance
The aromatic substances in the fuel form scale at the bottom of the burner. The
rate at which the scale forms depends on the fuel quality and the power at which
the heater is used. This means that the need for maintenance may vary. Mainte-
nance entails cleaning the burner of scale and replacing the fuel needle and the
base mat if necessary.
Cleaning the burner (2)
Lift the protective grille off the heater. Open the front panel of the heater, by loosen-
ing the two upper screws from both sides of the front panel.
Remove the two lowest screws on the front panel. Lift the panel slightly upwards
and pull it off its mountings.
Picture 1.
Picture 1.
Detach the temperature sensor screw and holder, as well as the corresponding
glow plug holder from the cover of the burner housing.
Picture 2
. Carefully remove
the glow plug and the temperature sensor, as the wiring will break if it is pulled too
forcefully. Take similar caution when removing the white seal from the temperature
sensor. If the seal has become porous and flaky, it must be replaced. If the glow
plug is broken, replace the old plug with a new one.
Picture 3
shows examples of an
undamaged glow plug and a typical short-circuited plug. The appearance of the
plug rarely changes if the plug fails temporarily.
Screw open the fuel needle holder, and carefully pull the fuel needle by rotating it.
Arrow in
picture 2
. The fuel needle is equipped with a locking ring, which determines
the installation depth for the needle. In models 26CC and 40CC , the installa-
tion depth is 50 mm. If the fuel needle is clogged, replace it with a new needle by
pulling the fuel hose from the upper connector on the pump and installing a new
needle’s hose in its place. Circle in
picture 2
. Open the fastening screws on the cover
of the burner housing (4 on the 26CC , 6 on the 40CC ). Remove the cover.
The seal on the inside of the cover must be undamaged. To detach the burner as-
sembly, pull out the spring holding it in place.
Picture 4.
en
26CC / 40CC
D80151
- 55 -
490525C