• Installation
• Lighting Instructions
C i5
No. Ci5-CPR-130622-SE-1
Product type
Type designation
Manufacturing number
Intended area of use
According to AVCP
European standard
Test institute
Insert lit with solid biofuels
Contura i5
See rating plate on the insert
Heating of rooms in residential buildings
NIBE AB / Contura
Box 134, Skulptörvägen 10
SE-285 23 Markaryd, Sweden
System 3
EN 13229:2001 / A2:2004
Rein-Ruhr Feuerstätten Prüfstelle, NB 1625,
has checked declared performance and issued test report no. RRF-29 12 3029
Essential characteristics
Reaction to fire
Minimum distance to combustible material
Intended for installation in an existing open
Risk of falling embers
Emissions from combustion
Surface temperatures
Cleaning options
Mechanical durability
Emissions of hazardous substances
Nominal output
5 kW
Flue gas temperature in connector at nominal
121 mg/m3
109 mg/m3
19 mg/m3
The undersigned is responsible for the manufacture and conformity with the declared performance.
Niklas Gunnarsson, Business area manager NIBE STOVES
Markaryd, 1st July 2013
Harmonised technical
EN 13229:2001 / A2:2004
A warm welcome to Contura.
A warm welcome to the Contura family. We hope
you will get a great deal of pleasure from your new
cassette. As a new owner of a Contura cassette, you
have secured a product with timeless design and
long service life. Contura also has a combustion
process that is both environmentally friendly and
efficient, for the best heat production.
Read through these installation instructions carefully
before installation. Read how to best light your stove
in the section with lighting instructions.
List of Contents
Installation instruction
Technical details / Dimensions
Supply of combustion air
Requirements for chimney Installation
Lighting instructions
Lighting in the right way
Possible causes for interruption in operation
Report the installation of a cassette to
your local building authority.
The cassette becomes very hot
The owner of the house is personally responsible
for ensuring compliance with the mandatory safety
requirements and must have the installation approved by
a qualified inspector. Your local chimney sweep must also
be informed about the installation as this will affect the
routines for regular chimney-sweeping services.
During operation, certain surfaces of the cassette become
very hot and can cause burn injury if touched. Also,
take heed of the strong heat radiated through the door
glass. Placing flammable material closer than the safe
distance indicated may cause a fire. Smoulder combustion
can cause quick gas ignition with the risk of damage to
property and personal injury.
Technical details
Installation by authorised technician
Output 3-9 kW
Nominal output 5 kW
Efficiency 78 %
Weight (kg)
Width (mm)
Depth (mm)
Height (mm)
This manual contains instructions about how the cassette must be
assembled and installed. To ensure the function and safety of the
cassette, we recommend that the installation is carried out by an
authorised technician. Contact one of our dealers who can recommend
suitable fitters.
480 ± 10
Type approved in accordance with:
European standard EN-13229 (DE/A), DINplus,
Part 15a B-VG in accordance with test report
RRF- 29 12 3029
Norwegian standard, SINTEF - 110-0391
Type approved in SE in accordance with
C i5
170 ± 10
480 ± 10
Alternative flue connections
Flue connection – 45° Rear
Flue connection - Rear
475 ± 10
410 ± 10
410 ± 10
Flue connection - Top
Supply of combustion air
For optimum function and efficiency a supply air
connection(accessory) is recommended via a separate channel.
The air can be supplied indirectly via a vent in the outer wall, or
directly through a duct from outside.
The connector on the supply air connector has an outer diameter
of Ø67 mm. When duct routing further than 1 m the pipe diameter
must be increased to 100 mm and a correspondingly larger wall
vent must be selected. The amount of air needed for combustion is
approx. 20 m3/h.
Requirements for the chimney
• The cassette meets the requirements for connecting to
chimneys dimensioned for 350 °C flue gas temperatures.
• The connection sleeve’s outer diameter is 125 mm.
• The cassette requires a draft in the chimney of at least
–12 Pa. The draft is affected both by the length and area
of the chimney, and by how well sealed it is. The minimum
recommended chimney length is 3.5 m and suitable crosssectional area is 120-175 cm² (125-150 mm in diameter).
• A flue with sharp bends and horizontal routing reduces the
draught in the chimney. The maximum horizontal flue is 1 m,
on the condition that the vertical flue length is at least 5 m.
• It must be possible to sweep the full length of the flue and the
soot doors must be easily accessible.
• Carefully check that the chimney is sealed and that there is no
leakage around soot doors and flue connections.
The cassette is designed to be installed in existing open hearths.
There must be a 20 mm air gap around the cassette for optimum
hot air convection.
Use the cardboard template and check that there is sufficient
space for the installation. Fold out template to see where the
sleeve connection ends up.
Min. 475 mm
Cardboard template
Min. 2
0 mm
90 mm
Min. 5
The cassette can be connected to the chimney from above, the
back or at angle of 45°, depending on the choice of sleeve.
Due to the risk of falling embers, a flammable floor must be
protected by a hearth plate. The hearth plate must extend 300
mm in front of the hearth and can consist of natural stone,
concrete, metal or glass. The minimum distance in front of the
hearth to combustible parts of the building or interior decoration
must be at least 1 metre.
Sleeve conn. 45°
Sleeve conn. 90° (Option)
Hood cover
Hearth cladding
Fire bars
Hearth bottom
Remove any old damper sheets and clean
the stove.
To simplify installation a hole can be made in the
stove hood. After installation is completed this
can be fitted with a grille and provide additional
Removing the internal parts
Remove internal loose cast iron components
and fire bricks as follows.
Handle the hearth
cladding with care.
Connection to chimney
A flexible hose is recommended for ease of installation (sold as an
accessory). Secure the sleeve in the hose. Connect and seal carefully
between the hose and the chimney according to the separate
instruction. Angle the hose so that the sleeve connector ends up
where the template shows the cassette’s connection surface
Seal carefully between the hose and
the chimney using mineral wool.
Alternative connection to chimney
The cassette can also be connected with fixed pipe
inserted up the chimney
Seal carefully between the hose
and the chimney using mineral
wool and seal any pipe joints
using heat–resistant sealant.
Ensure that the cassette is stable
by adjusting the feet.
Reinstall the internal
components in reverse order.
Final inspection of the installation
It is extremely important that the installation is inspected by an authorised chimney sweep before
the cassette is used. Also read the "Lighting instructions" before lighting for the first time.
Hot air grate (accessory)
Cover grille (accessory)
Chimney connection (accessory)
Lighting instructions
Lighting in the right way
Contura i5 is intended to produce secondary heating for the accommodation. It is important that the correct amount of wood is used, especially
when lighting. If you are lighting the fire for the first time you should use
a set of scales to see how much 1.5 kg kindling is. Also check what the
normal and maximum weights look like.
The cassette may only be lit with the hatch closed. Always open the hatch
carefully and slowly to prevent blow back because of the changing pressure
in the stove.
1. Open the combustion air damper completely.
The function of the cassette differs depending on the draft conditions in
the chimney. Achieving the correct setting for the combustion air damper
usually takes a few attempts.
3. Light the fire.
Correctly sized wood
Note that if too little kindling is used when lighting, or if the wood is too
thickly cut, the fire box will not reach the correct operating temperature.
Incorrect lighting can lead to poor combustion with heavy sooting and may
result in the fire going out when the hatch is shut.
If the house has mechanical ventilation, open a window near to the fireplace prior to lighting. Leave the window open for a few minutes until the
fire has caught properly.
2. Insert paper or firelighters and about 1.5 kg of thinly chopped kindling
into the firebox. Stack the wood crosswise.
4. Set the hatch to the lighting position, that is the lock catch’s first lock
position against the lock roller to create a sufficient air gap between
the hatch and the cassette.
5. When the fire has caught fully after approx 10-15 minutes, close the
hatch completely.
6. A fresh load of logs should not be put on until the start-up fire has
become a glowing bed of embers.
Lighting logs: Finely chopped wood
Length: 25-33 cm
Diameter: 3-4 cm
Weight per lighting: 1.5 kg (approx. 12-15 finely chopped pieces)
Feeding Wood: Split logs
Length: 25–33 cm
Diameter: 6–7 cm
Normal weight: 1.5 kg/hour (1-2 pieces per insertion)
Combustion air damper
Max amount: 3 kg/hour (1-2 pieces per insertion)
Adding wood
1. Open the hatch a few centimetres and allow the vacuum in the firebox
to equalise for a few seconds before opening the hatch fully.
2. Add two logs with a combined weight of approx 1-1.5 kg. Place one log
diagonally and one parallel to the back plate. Then close the hatch. The
combustion damper must be completely open for 5 minutes until the
logs turn black and are burning thoroughly.
It is important that the wood catches fire quickly.
Quick lighting is achieved by opening the combustion air damper fully or by leaving the hatch ajar for
a moment. Pyre lighting gives poor combustion and
produces a lot of smoke and can cause quick gas
ignition in the worst instance resulting in hearth
3. If slower combustion is then required, the supply of combustion air can
be reduced. The nominal output of 5 kW is obtained when the combustion air damper is 50 % open and two logs are lit. In this operating
position it is important that the air intake damper is fully open for the
first 5 minutes so that the wood has time to burn properly before the
supply of combustion air is reduced. A condition for regulating the
output is a thick bed of embers and high temperature in the firebox.
When the fire has died down to embers more wood should be added.
The conditions for controlling combustion vary depending on the temperature in the combustion chamber and the draft in the chimney.
Not too big fires
Fires should not be too big. Large fires are uneconomical and they give off
high flue gas temperatures that can damage the cassette and the environment. Recommended amount of wood for normal use is 1.5 kg/hour, with
the maximum permitted amount of 3 kg/hour when lighting with chopped
birch wood or other broad leaf wood with a moisture content of about 18
%. When lighting with the same wood amounts as above but with, for example, conifer wood, higher fireplace temperatures are achieved. The service
life of the fireplace can be cut short if the fire is left at full combustion for
long periods, and if the maximum permitted amount of wood is exceeded,
parts in the stove can become damaged thus voiding the warranty.
Choosing fuel
All types of wood, such as birch, beech, oak, elm, ash, conifers and fruit
trees can be used as fuel in the cassette. Different types of trees have different densities, the greater the
density of the wood the greater
the energy value. Oak, beech and
birch have the highest density.
The wood’s moisture
Fresh wood is about 50 per
cent water. Some of the water
circulates freely between the
fibres and some of the water is
bound in the cells. The wood must
always be dried so that the free
water evaporates. The timber is
ready for use when the moisture
content has fallen below 20 %.
If wood with a higher moisture
content is lit, a large part of the energy content of the wood is used boiling
off the water. If the wood is damp, the combustion is also poor, layers of
soot and tar build up in the chimney and could, at worst, lead to a chimney
fire. In addition, it causes the glass of the stove to soot and may cause
discomfort to those living nearby.
To ensure thoroughly dry wood, the wood should be cut in the winter and
stored, well aired, under a roof. Never cover the woodpile with a tarpaulin to the ground. The tarpaulin will then act as a sealed cover and the
wood will be prevented from drying. Always store a small amount of wood
indoors for several days before use, so that the surface moisture has time
to evaporate.
Do NOT burn the following
Under no circumstances may pressure impregnated wood, painted or glued
wood, chipboard, plastic or colour brochures be used as fuel. All these
materials can create hydrochloric acid and heavy metals that are damaging
both to the environment and the hearth. Hydrochloric acid can also attack
the steel in the chimney or the mortar in a stone built chimney.
The glass may be come sooty with use, even if lit with dry wood with a
moisture content of 15 – -20%. Regular cleaning with dry paper is usually sufficient to keep it clean. If the soot has been on the glass for a
prolonged period use a cleaning agent or a special soot removal agent to
remove it. Such agents can be purchased from regular hardware stores or
from your local stove dealer.
Never use cleaning agents that contain any abrasives, these can damage
the glass.
When emptying the ash, ensure that there are no glowing embers. The
ash must be stored in a fireproof container with a lid for at least one week
before being disposed of.
Cast iron parts are cleaned using a steel brush.
It is important from a combustion point of view to check gaskets, as worn
gaskets hinder combustion when the stove draws “extra air”.
Painted parts on the cassette can be cleaned using a damp cloth, with
a small amount of detergent, if necessary. Damage to painted parts, e.g.
small scratches, can be rectified with Contura touch-up paint. Contact the
Parts located near the actual seat of the fire may require replacing. Examples of such parts are the hearth surround. The service life of these parts
depends on how much and how the cassette is used.
When the cassette is new
When new, the cassette may emit an odour due to excess paint and oil coating that may remain on the panels. The odour will disappear completely
after several fires.
Managing waste
The cassette packaging is cardboard, wood and a small amount of plastic.
The materials must be sorted and recycled.
Hearth plate glass must
be discarded as waste
material together with
pottery and porcelain
Possible causes of malfunctions and how to
rectify them
Poor draft in the cassette after new installation
Abnormal amounts of soot form on the glass
Check that the chimney length meets Contura’s recommendation, which
is at least 3.5 m.
There is always a certain amount of soot on the glass and this is added to
with each lighting. Soot on the glass is caused by three things:
Check that there is nothing in the chimney to restrict the smoke and
that no nearby buildings or trees affect the winds around the chimney.
The wood is damp, which causes poor combustion and generates a lot
of smoke as a result.
Check the chimney area (applies to existing chimneys). The area must
be 120–175 cm².
Too low temperature in the firebox, which causes incomplete combustion and poor draft in the chimney.
Handling is not correct, for example the hatch was not in the lighting
position for 15 min.
It is difficult to light the fire and the fire dies
after a short time
The wood may not be dry enough, check the wood.
Another reason is that there may be negative pressure in the house,
for example when using a kitchen extractor fan or other mechanical
ventilation. Open a window near the cassette before lighting the fire.
Also try lighting some newspaper and holding it up inside the firebox to
get the draft going.
The supply air duct from outdoors can be partially or totally blocked.
Remove the hose and try test lighting with combustion air from the
Check that the combustion air damper is in the correct position, see
the instructions
The smoke outlet of the cassette may be blocked with soot, which can
occur after sweeping. Lift the smoke baffle out and check.
Finally, go through the lighting instructions again. Perhaps the amount
of kindling was too small and therefore the base embers were too weak
and cold to light the next load of wood.
Check the moisture content of the wood, ensure that you have good base
embers and go through the lighting instructions one more time.
Smoke odour around the cassette for periods
This can occur when wind blows down the chimney and most often occurs
when the wind is from a particular direction. Another reason could be that
the hatch was opened when there was a lot of flame.
Painted parts have become discoloured
If painted parts have discoloured it is due to excessive temperature in
the firebox. The reason for the excessive temperature can be that the
maximum amount of wood has been exceeded, inappropriate fuel has been
used (for example building waste, large quantities of finely chopped off
cuts). The warranty does not cover damage of this type.
If a problem occurs that you cannot rectify yourself, contact the dealer or
a chimney sweep.
We hope that these lighting tips give you enjoyable, economical and problem free use of your Contura cassette.
Sweeping the chimney ducts and chimney connections should be carried out by a chimney sweep. Sweep
the cassette by scraping and/or brushing. A soot vacuum cleaner is most appropriate however.
If a chimney fire occurs or is suspected, the combustion damper and the door must be closed. If necessary, contact the fire brigade to extinguish it. The chimney must always be inspected by a chimney sweep
after a chimney fire.
During operation, certain surfaces of the cassette become very hot and can cause burn injury if touched.
Also, take heed of the strong heat radiated through the door glass.
Placing flammable material closer than the safe distance indicated may cause a fire.
Smoulder combustion can cause quick gas ignition with the risk of damage to property and personal injury.
NIBE AB · Box 134 · SE-285 23 Markaryd · Sweden
811175 IAV SE-EX Ci5-7
Contura reserves the right to change colours, materials,
dimensions and models at any time without special notice.
Your dealer can give you the most up to date information.
Stoves shown in brochures may have extra equipment.