4
2009-03
RVR
Energy Technology Experts
General
Planning laws, or notifi cations, do not normally need to be
applied where the existing boiler can be heated using pellets.
Contact your local authority regarding any possible restrictions
on the use of solid fuel burning in built-up areas.
The fl ue
A fl ue, which has previously been used for oil burning, would
normally also be suitable for pellet burning; whilst a fl ue used
for wood burning may have too large diameter, requirements
are as follows:
Min:
height 2 m,
∅
100mm or equivalent.
Max:
draught <20 Pa, corresponding to 8-9 m height.
The draught is measured whilst the the fl ue is warm and under
normal operation.
The boiler
The Viking Bio can be mounted on to most domestic boilers.
Pellet burning produces a certain amount of ash, which needs
to be accommodated. The removal of ash from the boiler
should also be relatively easy.
The boiler must be of the correct size in relation to burner out-
put, so that fl ue-gases are cooled to a suitable temperature.
The boiler smoke/gas ducts must not be so narrow so as to
prevent the free fall of ash residue.
If possible, the burner should be mounted onto the oil burner
hatch and preferably so that this can be opened without need-
ing to remove the burner; thus simplifying maintenance.
Wood burning boilers have larger spaces for ash and are usu-
ally easier to keep free of soot. An old wood burner is not usu-
ally a good choice as the heat absorbing surfaces are normally
too small to be able to cool down fl ue-gases suffi ciently.
The boiler hatches and damper must be tightly sealed so that
air cannot penetrate the interior.
The fl ame must not be allowed to touch the walls of the boiler.
The boiler chamber's minimum measurements are 230 x 230 x
365 mm (h x b x d) see diagram below.
If the depth measurement of 150 mm cannot be obtained, it is
possible to build out the burner from the hatch; alternatively,
more packing can be used between the hatch and burner.
The distance to the bottom of the boiler should be deep
enough that there is enough space for a week's build up of ash
in winter conditions. The greatest amount of ash collects in the
deepest part of the boiler.
Assembling of burner
A. Loosen the three
screws which keep
the burner's cover
in position and re-
move it. Open the
quick release fas-
teners, release the
combustion pipe
with fl anges from
the burner.
Mark out where the
burner is going to
sit and make a hole
according to the
adjoining diagram.
B. The burner fl ange and fl ange packing is mounted onto the
burner hatch and screwed
down with four times M6
screws. The burner must
be mounted horizontally, or
alternatively, sloping down
somewhat at the boiler.
C. Mount the burner on the
burner fl ange and close the
quick release fasteners.
Check that the burner tight-
ens against the sealant mate-
rial on the burner fl ange.
Assembling of downpipe
The downpipe must be screwed down onto the burner's frame.
The downpipe can be turned 22
° in order to obtain a suitable
angle against the screw feeder.
1. Temperature delimiter with cable on downpipe.
2. The cable's connection tool is attached here.
3. The cable is attached using a tie band running along the burner as
shown in the picture.
Please ensure that the contact points are properly engaged.
365 mm
150 mm
50 mm
50 mm
Installation
1
2
3
Burner hatch
Flange packing
(non symmetric)
Burner
fl
ange
The installation must be carried out according to current regu-
lations. It is the responsibility of the installer to be aware of
current standards.
A contrafl ow hatch must always be used. Where the fl ue
height is more than 5 m, a contrafl ow hatch must be used.
If necessary, a breaker (SW2/2) can be set at "high draught".
See "Contrafl ow hatch", page 10.
The burner hatch must be properly insulated.