Nibe VEDEX 3300, Installation And Maintenance Instructions Manual

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7 VEDEX 3300
For Home Owners
Wood firing
Lighting instructions
It is important that initial firing is carried out carefully in a
new boiler so that any remaining crystallisation water in
the ceramics is condensed slowly to prevent cracking.
Add approximately 4 kg of finely chopped kindling
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wood and then tightly screwed up newspapers on top.
Light the newspaper and leave the filler door ajar.
Wait until the wood has caught fire properly (flue gas
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temperature approximately 130 – 150°C) and the
green light comes on.
Close the door and let the fire burn to a bed of em-
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bers, approximately 30 – 45 minutes depending on the
amount of wood.
Once a bed of embers has been created, more wood
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can be added.
Check that the flue gas temperature rises, this is a sign
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that combustion has started.
The boiler is now in normal operating mode.
Add more wood when a bed of embers remains at the
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bottom of the hearth.
Adding wood
Add wood via the filler door. When this door is opened, a
microswitch is affected, which, in, turn increases the speed
of the fan.
It is important that the amount of fuel is adjusted accord-
ing to the temperature levels in the accumulator system so
that it does not become overcharged.
Even out the embers before adding more wood. Then
close the filler door. The speed of the fan is now slowed
and normal operation resumed.
VEDEX 3300 is designed for 0.5
m long pieces of wood. Stack
the wood well when adding.
Start by laying three logs as
marked in the image. Position
the logs so that they do not ob-
struct the grate hole. If shorter
pieces of wood are used, stack
these over the grate hole to-
wards the rear wall.
When the wood in the boiler has been burned and the
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flue gas temperature drops to 80 – 85 °C, and a mini-
mal bed of embers remains, the green light should go
out, if not, readjust the flue gas thermo-
stat.
It is now set and should not need further
adjustment. At the next firing procedure,
the green light automatically comes on
when the flue gas temperature has reached approxi-
mately 80 – 85°C.
Readjustment
The flame can be checked through the sight glass af-
ter about 30 minutes operation. The colour of the flame
should then be yellow with a light blue tint.
The following points should be observed for VEDEX 3300
to perform optimally:
Follow the lighting procedure by checking the flue gas
■
temperature.
The fan should never stop during the firing cycle.
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When the accumulator is fully charged, there should
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no longer be any wood in the wood magazine.
Never open the combustion chamber door during op-
■
eration.
The combustion of wood can vary depending on its
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moisture content and type as well as on the position of
the primary air damper.
If the wood is not fed downwards and the flue gas
temperature is low, this may be due to an insufficient
amount of air being drawn in through the primary air
ducts. Adjust the damper to the left.
If the wood burns as in
case (A), the air supply is
too great from the top and
too low from the middle.
If the wood burns as in
case (A), the air supply is
too great from the middle
and too low from the top.
The correct air flow as per
case (C) gives the most ef-
ficient combustion.
It is not necessary to adjust the primary air damper if
any of cases fallen (A) and (B) occur on the odd occa-
sion.
A
B
C
20 100
40 80
60
0 120
2
1 bar 3
0 4
1
2
3
Wood firing