1101
1 7
Illustrations may differ from actual product
Subject to printing/proofreading errors
Operation and maintenance
Sweeping
Switch off the power to the burner and detach the plug before
cleaning or service or before the burner is detached from the
boiler.
The flue gas thermometer is a good way of knowing when it is time to
sweep and clean the boiler. To retain good efficiency, the boiler should be
swept and cleaned when the flue gas temperature has risen by approxi-
mately 50 °C in relation to when the boiler was last swept.
A good aid for emptying the boiler and burner of ash is an ash can, which
is connected to a vacuum cleaner.
Sweep and clean the boiler when the flue gas temperature has
risen by approximately 50 °C since the boiler was last swept.
Cleaning the burner
Risk of burn injuries.
Always let the burner finish burning before starting to clean
it. Otherwise there may be burning pellets in the burner.
The burner requires regular cleaning. If the burner is operated at low
power or in modulating mode, the need to clean the inner burner pipe
increases to around twice a week.
When the boiler is swept, it is appropriate to clean the inner burner pipe
with the ash rake supplied. You should also remove the grate and rake out
the ash there.
Every two or three times the boiler is swept, the ash and dust that has col-
lected between the outer and inner burner pipes must be removed. Open
the quick attachments and separate the burner, with the inner burner pipe,
from the outer burner pipe. First detach the quick coupler on the hose from
the feed auger and the power supply.
Brush the grate clean with a hard brush. Avoid brushing off the oxide layer
formed on the grate. During cleaning, the louvres on the grate must not be
pressed together. The opening must be approximately 1 mm.
Each time cleaning takes place, check the condition of the parts in contact
with the flame, the grate, the inner burner pipe, the end wall and the lip.
Replace damaged parts as soon as possible.
When you refit the burner, check that the silicone gasket is in place and is
airtight. Otherwise, the inner burner pipe may be damaged.
Silicone gasket
Inner burner pipe
Lip
End wall
Ignition element
Ash rake
Blow any dust that has collected in and on the burner away carefully with
compressed air or brush it away with a soft brush. Clean the photoresistor
as well.
Ash and soot
Always be careful with ash as it may be smouldering.
Ash and soot must be stored in an ash bucket made of sheet metal with a
tight lid. The ash bucket must be placed on non-flammable material.
Position of grate
The grate must be positioned as shown in the figures below. If the grate is
in the wrong position, the ignition time is extended or ignition may fail. The
ignition element may also be damaged.
a
b
c
d
c
d
e
e
f
f
g
g
h
a. Cross-section of inner burner pipe at front edge of grate.
b. Cross-section of burner pipes in their longitudinal direction.
c. End wall.
d. Grate.
e. Lip. Prevents pellets from bouncing out into the combustion chamber
and reduces heat radiation.
f. The grate must be in contact with the inner wall. There must be a small
gap at the rear edge of the grate.
g. The grate must be in contact with the inner burner pipe.
h. Gap.
Check that:
- the grate is correctly refitted.
- the lip is correctly suspended.
Cleaning the pellet store
Over time, there will be fine fractions of pellets in the base of the pellet
store. They may prevent the feed auger from obtaining pellets and pellet
supply will be irregular.
The pellet store should be cleaned regularly. The interval between cleaning
depends on the volume of pellets consumed and the quality of the pellets.
