Heta Classic Series User manual

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www.heta.dk
CLASSIC RECESSED
OPERATING INSTRUCTIONS
UK
www.heta.dk

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Congratulations on your new stove.
We are sure that you will be happy
with your investment, especially if
you follow the advice and instruc-
tions we have put together in these
operating instructions.
The Classic recessed has been appro-
ved according to the EN 13229.
Approval means that consumers can
be sure, that the stove meets a range
of specifications and requirements
may have an adverse effect on st-
ove combustion properties. In ad-
dition, this may cause smoke to be
emitted from the stove
when the firing door is opened.
4. It must not be possible to cover any
air vents.
The floor
A non-flammable floor surface (e.g.
steel, tile, brick), must extend from
the front of the fireplace for a mini-
mum of 30 cm.
The chimney connection
The chimney opening must fol-
low national and local regulations.
However, the area of the opening
should never be less than 175 cm2,
which corresponds to a diameter of
150 mm. If a damper is fitted in the
flue gas pipe, there must always be
at least 20 cm2of free passage, even
when the damper is in its “closed”
position. If local regulations permit,
two contained fireplaces can be con-
nected to the same chimney. Howe-
ver, you must abide by local regulati-
ons regarding the distance between
the two connections.
The stove must never be connected
to chimneys that are also linked to
a gasfired heater. An efficient stove
intended to ensure that the materi-
als used are of good quality, that the
stove does not adversely affect the
environment, and hat it is economi-
cal to use.
With your new stove you should have
received the following:
a. Operating instructions
b. Guarantee slip
c. A stove glove
Safety clearances
Stoves must always be installed in line
with national and, if applicable, local
regulations. It is important to abide
by local regulations regarding setting
up chimneys and connection to same.
The refore, always consult your local
chimney sweep before installation, as
you are personally responsible for en-
suring that the applicable regulations
have been met .
Distance regulations
A difference applies to installation
next to flammable and non-flam-
mable walls.
Warning
A stove gets hot. (In excess of
90 degrees) Take care to en-
sure that children and elderly
or infirm people cannot come
into contact with it.
IMPORTANT
1. Make sure there is adequate provi-
sion to sweep the chimney.
2. Make sure there is adequate venti-
lation to the room.
3. Please note that any extraction
fans operating in the same room
as the wood-burning stove can
reduce the chimney draft – which
INSTALLATION INSTRUCTIONS

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makes high demand on chimney pro-
perties – so always have your local
chimney sweep evaluate your chim-
ney.
Connection to a brick chimney
Brick a thimble into the chimney and
seat the flue gas pipe in this. The
thimble and flue gas pipe must not
penetrate the chimney opening it-
self, but must be flush with the inside
of the chimney duct. Joins between
brickwork, the thimble and flue gas
pipe must be sealed with fireproof
material and/or beading
Connection to a steel chimney
When fitting a connection from a
top-output stove directly to a steel
chimney, we recommend fitting the
chimney tube inside the flue gas spi-
got so that any soot and condensa-
tion drops into the stove itself rather
than collecting on the exterior sur-
face of the stove.
For connections to chimneys that are
run through ceilings, all national and
local regulations regarding distance
to flammable material must be fol-
lowed. It is important that the chim-
ney is fitted with roof support so that
the top panel of the stove is not re-
quired to bear the entire weight of
the chimney (excessive weight may
damage the stove).
Draft conditions
Poor draft may result in smoke being
emitted from the stove when the
door is opened. The minimum chim-
ney draft to ensure satisfactory com-
bustion in stoves of this kind is 12 PA.
However, there will still be a risk of
smoke emission if the firing door is
opened during powerful firing. The
flue gas temperature at nominal out-
put is 290°C when expelled to an ex-
terior temperature of 20°C. The flue
gas mass flow is 6 g/sec. The chimney
draft is generated by the difference
between the high temperature of the
chimney and the low temperature of
the fresh air. The length and insula-
tion of the chimney, wind and wea-
ther conditions also have an effect on
the ability of the chimney to genera-
te appropriate under-pressure.
If the stove has not been used in a
while, check that the chimney and
stove are not blocked with soot, bird
nests, etc., before using it.
Reduced draft can occur when:
- The difference in temperature is too
small – due to insufficient chimney in-
sulation, for example.
- The outdoor temperature is too high
– in summer, for example.
- No wind is blowing.
- The chimney is too low and shelte-
red.
- The chimney contains false air.
- The chimney and flue gas pipe are
blocked.
- The house is too airtight (i.e. when
there is an insufficient supply of
fresh air).
- Poor smoke extraction (poor draft
conditions) due to a cold chimney
or bad weather conditions can be
compensated for by increasing the
airflow into the stove.
Good draft occurs when:
- The difference in temperature
between the chimney and outdoor
air is high.
- The weather is fine.
- The wind is blowing strongly.
- Th e chimney is of the correct height:
at least 4.00 m above the stove and
free of the roof ridge.

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the wood for 1–2 years before use.
Pieces of firewood with a diameter of
more than 10 cm should be split be-
fore storing. The pieces of firewood
should be of an appropriate length
(approx. 30-40 cm) so that they can
lie flat on the bed of embers. If you
store your wood outdoors, it is best
to cover it.
Examples of fuel values of
different woods
Fuel type / number of cubic metres
per 1,000 litres of oil
Oak Beech Ash Birch Elm C o m m o n
spruce
7,0 7,0 7,2 8,0 8,9 10,4
Chimney fires
In the event of a chimney fire – which
often results from incorrect opera-
tion or protracted firing with moist
wood – close the door and shut off
the secondary/start-up air supply to
smother the fire. Call the fire depart-
ment.
Regulating the airflow
Secondary airflow is regulated using
the operating handle above the glass
door.
The secondary airflow is fully open
when the operating handle is in the
right position, and fully closed when
positioned to the left.
INSTRUCTIONS FOR USE
First firing
The stove has been treated with a
heat-resistant coating which har dens
at a temperature of approximately 250
ºC. This hardening process causes the
production of smoke and malodo-
rous fumes, so the room must be very
well ventilated.
During the first firing, which should
be carried out using approximatly 1,0
kg. of wood, the stoking door must
be left slightly open and must not be
closed until the stove is cold. This is
to prevent the sealing rope sticking
to the stove.
Fuel
Your new stove is EN approved for
firing with wood fuel. You must there-
fore only burn clean, dry wood in your
stove. Never use your stove to burn
drifwood, as this may contain a lot
of salt which can damage both the
stove and the chimney. Similarly, you
must not fire your stove with refuse,
painted wood, pressure-impregnated
wood or chipboard, as these materials
can emit poisonous fumes and smo-
ke. Correct firing using well seasoned
wood provides optimal heat output
and maximum economy. At the same
time, correct firing prevents environ-
mental damage in the form of smoke
and emmissions and also reduces the
risk of chimney fires. If the wood is
wet and inadequately seasoned, a
large proportion of the energy in the
fuel will be used to vaporise the wa-
ter, and this will all disappear up the
chimney. Thus it is important to use
dry, well seasoned wood, i.e. wood
with a moisture content of no more
than 18%. This is achieved by storing
Closed Open

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Lighting
To ignite the fuel, use fire lighters, small
paraffin ignition bags or small pieces
of wood placed on the bottom grate.
Place larger pieces of wood on top of
this kindling material, at right angles
to the firing, doors. Completely open
the secondary air supply and leave the
firing door ajar – i.e. approx. 1 cm open.
Once the fire has taken a good hold of
the fuel and the chimney has heated
up (after about 10 min) close the firing
door. We recommend that you burn the
entire first firing with the secondary air
supply fully open to make sure that the
chimney is thoroughly heated.
Refiring
You should normally refire the stove
while there is still a good layer of em-
bers . Distribute the embers across
the bottom grate, place pieces of
fuel (max. 2,5 kg) on the embers in
a single layer perpendicular to the
firing opening. Close the firing door.
The wood will then ignite within 30
to 60 seconds. When the flames are
steady, adjust the secondary airflow
to the level required. Nominal ope-
ration (6 kW) will be achieved when
the secondary airflow is fully open.
When firing, take care not to place
the pieces of fuel too closely to-
gether, as this will result in poor com-
bustion and insufficient exploitation
of the fuel.
Reduced burning
The stove is well-suited to intermit-
tent use. If you wish to operate the
stove with reduced out-put, simply
insert smaller volumes of wood at
each firing, and apply a lower airflow.
However, remember that the secondary
combustion air supply must never be
shut off completely during firing. It
is important to keep a good bed of
embers. Gentle heat is released when
the fire settles - i.e. when the wood
no longer generates flames and has
been converted to glowing embers.
Optimal firing
To achieve optimal firing and the hig-
hest possible effect, it is important to
make sure that the air supply is used
correctly. As a general rule, the se-
condary air is to be used to control
the fire to ignite the flue gases. This
produces a high effect and keeps
the glass panel completely clear of
soot as the secondary air “washes”
down over it. Please note that the
stove will, naturally, produce soot if
the secondary air intakes are closed
completely. This will prevent oxygen
from being drawn into the stove, and
the viewing window and other parts
will become covered with soot. If
this situation is combined with firing
with wet wood, the build-up of soot
can become so thick and sticky that
the sealing rope can, for example,
become detached when the door is
opened the next day.
Risk of explosion
After you add new fuel, it is
very important that you do not
leave the stove unattended
until the wood is burning con-
stantly. This will normally occur
within 30 to 60 seconds.
A risk of explosion can possibly arise
if too much wood is placed in the sto-
ve. This may result in the production
of large volumes of gas, and this gas
can explode if the intake of primary
and secondary air is insufficient.
It is an advantage always to leave
some ash lying in the bottom of the
combstion chamber.

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Be careful when emptying the
ashes. Hot embers can remain
in the ash for a long time.
Stove data table in accordance with EN 13229 testing.
Stove
type
Nominal
uegas
temperature
c°
Smoke
stub
mm
Fuel
volume
kg
Draught
min
mbar
Nominal
output
tested
kW
Heat
output
kW
Distance to ammable
materials in mm
behind at the
the stove sides
Distance to
furnitures
from the
stove in mm
Stove
weight
kg
Classic 290 ø150 12,5 0,12 6 6 60 60 1000 91
The nominal output is the output to which the stove has been tested.
The test was carried out with the secondary air 100% open.
OPERATIONAL PROBLEMS
MAINTENANCE
The surface of the stove has been
trea-ted with heat-resistant paint.
The stove should be cleaned with
a damp cloth. Any damage to the
surface in the form of chips or scrat-
ches can be repaired using touch-
up paint, which is available in spray
cans.
The chimney must be swept at least
once a year, we recommend the use of
a NACS (national assoc iation of chim-
ney sweeps) registered chimney sweep.
In the event of smoke or malodorou s
fumes being produced, you must first
check to see whether the chimney is
blocked. The chimney must, of course,
always provide the minimum draught
necessary to ensure that it is possible to
regulate the fire. Please note, howe-
ver, that chimney draft is dependent on
the weather conditions. In high winds,
the draft can become so powerful that
it may be necessary to fit a damper in
the flue gas pipe to regulate the draft.
When cleaning the chimney, soot and
other deposits may come to fall on the
smoke plate. In cases where the wood
burns too quickly, this may be due to
excessive chimney draught. You should
also check to make sure that the door
seal and ashpan seal is intact and cor-
rectly fitting.
If the stove it generating too little
heat, this may be because you are fi-
ring with wet wood. In this case, much
of the heating energy is used to dry the
wood, resulting in poor heating eco-
nomics and an increased risk of soot
deposits in the chimney.
Cleaning the glass
Incorrect firing, for example using
wet wood, can result in the viewing
window becoming covered in soot.
This soot can be easily and effectively
removed by using proprietary stove
glass cleaner.

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Cleaning after sweeping the chimney and
replacing the stones. Fig 1-4
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26-05-2009 0037-1126
GUARANTEE
Heta stoves are subjected to strin-
gent quality control procedures both
throughout the production process
and immediately before delivery to
the dealer. Therefore, the stoves are
guaranteed against defects in manu-
facturing
FOR FIVE YEARS.
This guarantee does not cover: Wea-
ring parts/fragile parts such as:
• The re-proof bricks in the
combustion chamber.
• The smoke bafe
• The glass
• The sealing rope
• The grate frame.
Damage resulting from incorrect
use Transport costs in connection with
repairs carried out under guarantee
Installation/disassembly in connec-
tion with repairs carried out under
guarantee
Should you have cause to make a
complaint, please quote our invoice
no.
Warning
Any unauthorised
modification of the
stove and any use of
non-original spares will
void the guarantee.