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11.03
Vedolux 30
Illustrations may differ from the actual product
Allowing for printing errors and errors on proofs
Problems.burning.firewood
The most common problems that occur when burning firewood are usually the result of the boiler failing to reach a high enough
temperature so that the boiler never really gets going. Another common problem is that the heat is not transferred to the
accumulator tanks even though the wood is burning well in the boiler.
Poor.combustion.
Damp wood.
A ceramic boiler requires a high combustion temperature. To achieve
this, the wood must be dry, moisture content 12- 25%.
Incorrect handling.
Read the instructions.
The wood is not suitable for the
boiler.
The firewood should be approx. 20 in. long, with a width allowing three
blocks to fit the width of the grate.
Constant “topping up”
Constant “topping up” lowers the combustion temperature and re-
duces the boiler output.
Shaped wood, rectangular wood.
If uniform blocks of wood are stacked on each other, a sold mass of
wood is created with limited surface area for the fire to act on. Arrange
the wood so there are gaps between the blocks.
Fails to burn.
The wood is bent and/or not suitable for the boiler. This is not the same
thing as the firewood burning to a different extent in different parts of the
boiler, which is normal.
Not enough air.
Check that the air valve is open. The fresh air intake of the boiler room
must have at least the same cross sectional area as the flue duct.
Damper too open.
If the damper is too open, the air will not be correctly distributed in the
boiler. Start with the damper fully closed.
The chimney runs downwards from
the boiler connection.
The turbulence created takes away some of the draught. Fill the lower
part with sand or similar material.
No accumulator control.
A ceramic boiler is at its most efficient when the ceramic is hot. The
temperature in the boiler therefore needs to be increased quickly before
charging begins. The service life of the boiler is shortened if there is no
control system. Add a control system.
Ceramic not correctly positioned.
If the boiler is new, check that the ceramic has not moved during
transport. Also check the seal with the combustion chamber walls.
High.flue.gas.temperature.
Tar and soot in the pipes.
Incorrect combustion. Check the firewood, the draught, the air intake
and the handling. Clean the boiler.
Bypass damper open.
Close the damper. The bypass damper must only be opened for adding
wood.
Combustion tunnel in wrong
position.
The combustion tunnel must be inserted fully.
Faulty flue gas thermometer.
The thermometer may have been damaged by cleaning or by long
periods of up draught burning.
Tar.and.soot.in.the.pipes.
Incorrect combustion.
See the section about high flue gas temperature.
Heat.is.not.transferred.from.the.
boiler.to.the.accumulator.
Wrong connections.
Check.
Circulation pump in accumulation
control.
Check that the pump is operational. Most pumps have a speed control –
check that the speed is not too low.
Air.
Vent. Check the installation. If installation is carried out according to
“Connection to accumulator system”, the system will not be sensitive to
air problems.
Wrong connection of accumulator. See the points above.
Boiling.noises.
Low pressure head.
Check the pressure, which should be about 14.5 psi. The expansion
vessel must be dimensioned for the volume and for the temperature
variations that occur.
Fan.fails.to.start.
Main switch in position O.
Set the main switches to position I.
Forgotten to connect the instant
connector.
Connect the instant connector.
Overheating protection triggered. Reset the overheating protection.
The.safety.valve.opens.when.the.
system.is.warm.
Expansion vessel too small.
See the section about the “Expansion system” on page 5.
Initial pressure in the expansion
vessel too high/low.
Check the pressure in the vessel, see the section about the “Expansion
system”.
