Nibe VEDEX 4000, Installation And Maintenance Manual

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19 VEDEX 4000
The following points should be observed for VEDEX
4000 to perform optimally:
• Follow the lighting procedure by checking the flue
gas temperature.
• The fan should never stop during the firing cycle.
• When the accumulator is fully charged, there
should no longer be any wood in the wood mag-
azine.
• Never open the combustion chamber door during
operation.
• The combustion of wood can vary depending on
its moisture content and type as well as on the
position of the primary air damper.
The flame can be checked through the sight glass
after about 30 minutes operation. The colour of the
flame should then be yellow with a light blue tint in
lower doors.
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.
Regulation
Adding wood
Lighting instructions
Add wood via the filler door. When this door is opened, a
microswitch is affected, which, in turn increases the speed
of the fan. To prevent self-ignition of gases and flame re -
traction when opening the door, you should slowly open the
door at 1-2 cm, wait a moment for the air to flow into the
boiler through the door and then open it wider.
It is important that the amount of fuel is adjusted according
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 now slows and normal
operation is resumed.
VEDEX 4000 is designed for 0.5 m long pieces of wood.
Stack the wood well when adding. Place the logs so that
they do not block the grate hole, see an example of posi-
tioning in the images below. If shorter pieces of wood are
used, stack these over the grate hole towards the rear wall.
5 Wood firing
Loading chamber
sight glass
Combustion cham-
ber sight glass
It is forbidden to directly touch the sight
glasses and the boiler door during operation,
as the high temperature of these components
can cause burns.
NOTE
1. Put approx. 4kg of finely chopped wood, and lay
it in layers set crosswise, in order to create gaps
between the various layers of wood. Open the
primary air valves, and close the secondary air
valves.
2. Put a larger piece of newspaper on top and then
set it on fire with the top door ajar.
3. Wait until the wood begins to burn properly (flue
gas temperature should be around 170-200 °C.)
4. Leave the top door of the furnace open until the
initial portion of wood ignites.
5. You can add more wood after igniting the starting
portion. After adding more wood, leave the prima-
ry air valves slightly ajar and open the secondary
air valves and then close the top door of the up-
per combustion chamber. The flue gas tempera -
ture should decrease.
6. Check whether the flue gas temperature is rising
a few minutes after adding wood. If the tempera-
ture starts to increase, the boiler is in normal op-
erating mode (i.e. flue gas temperature is approx.
150-180 °C).
7. You can add another portion of wood when the
glow remains in the furnace.
During the wood catching fire you should stay
near the boiler, after closing the door and mak-
ing sure that the boiler is working properly, you
can leave the boiler room.
NOTE