KFD STO MAX 7 3F User manual

Installation and operation
manual for stoves
STO MAX 7 3F STO MAX 7

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The fireplace insert is a heating and decorative device, allowing construction of a complete heating
system based on distribution of hot air. It is not an autonomous heating device but a component of the
heating system. Due to the above reasons, its operation and safety largely depends on the method of
installation and materials used. Considering that, it is recommended that installation of the insert is
commissioned to an Authorised KFD Fitter, guaranteeing an appropriate standard of service.
All domestic and local regulations ought to be observed.
1Construction of the stoves..........................................................................................3
1.1 Placement of the stove ....................................................................................................................................3
1.2 Preparation and unpacking .............................................................................................................................3
1.3 General assembly rules...................................................................................................................................3
1.4 Assembly of cladding .......................................................................................................................................3
2Installation....................................................................................................................4
2.1 Stove placement ..................................................................................................................................................4
2.2 Chimney.............................................................................................................................................................5
2.3 Tip of the chimney ............................................................................................................................................8
2.4 Connection to the external air intake.............................................................................................................9
3Stove operation..........................................................................................................10
3.1 Lightning ...........................................................................................................................................................10
3.2 Flame control.....................................................................................................................................................10
3.2.1 In case of emergencies...................................................................................................................................................................... 11
3.2.2 Glass.................................................................................................................................................................................................... 11
3.2.3 Cleaning out the ashes...................................................................................................................................................................... 11
3.2.4 Removing and cleaning of deflector................................................................................................................................................. 11
3.2.5 Summer break in device usage........................................................................................................................................................ 12
3.3 Fuel for the stove............................................................................................................................................12
3.4 Hints for users.................................................................................................................................................12
4Parameter selection for flue pipe .............................................................................14
5Technical specifications............................................................................................15
6Troubleshooting.........................................................................................................17
7Inspection log.............................................................................................................19

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1 Construction of the stoves
1.1 Placement of the stove
Ventilation: To allow proper operation, verify that the oxygen equired for combustion can be
obtained in sufficient quantity in the place where it is to install the appliance.
Location of appliance: Choose a central location in the room that favors a good distribution.
Ensure that there aren't made or coated with materials that are flammable or degrade with
heat effect (wallpaper, carpet, light closures based on plastics, etc.)
Not allowed the installation of the stove in bedrooms or bathrooms neither in places
that has been already installed other heating appliance or a fume extraction system
without an independent air intake (kitchen extractor, fireplace, stove, etc.).
It is forbidden to place the fireplace in explosive environments.
With wooden floors, provide for protection of the soil surface in accordance with the
rules in force in the country.
1.2 Preparation and unpacking
When you unpack the fireplace, check for perfect operation, as well as the possible
presence of shipping damage. Any anomalies must be immediately reported to the
transport carrier or seller.
Check the accordance with what is provided.
The chimney must always move in VERTICAL position
The glass is fragile, it's necessary to protect it.
If possible, unpack the fireplace near the area where you will install it.
1.3 General assembly rules
The appliance must always lean on a structure which support the weight and leave at
least 5 cm air gap between the chimney and walls
If the chimney is placed on a floor or near combustible walls, a proper insulation is
recommended.
1.4 Assembly of cladding
The fireplace and the parts of the cladding must be attached together WITHOUT ANY
CONTACT WITH STEEL STRUCTURE to prevent heat transmission to the coating and allow
thermal expansions. Beware of wood finishes such as beams or shelves, which must be
properly insulated.
In particular, the shelves should be placed at a distance upper to 30 cm from the top of the
appliance.

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2Installation
2.1 Stove placement
During stove installation put attention to placement of the combustible elements. Minimum
distances which should be preserved are:
a) Side (A) –61 cm
b) Side (B) –150 cm in case of glassed side
c) Back (A)–61 cm
d) Front (B)–150 cm
e) Side (C) –50 cm
f) Side (D) –122 cm in case of glassed side
View from above
View from above

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KFD stove must be installed on fireproof surface. If stove is going to be placed on wooden
floor or similar combustible surface, it must be preserved with high temperature (fire)
resistant material. Floor must be preserved under and around the stove.
Local regulations in exact country have the primacy of information presented in this
manual.
All local standards and regulations regarding to distance of the wall and exhaust pipe.
2.2 Chimney
After stove installation the stoves air outlet must be connected with exhaust gas pipe. This
connection should be made with attested pipe which can be used into solid fuel fireplaces. Its
diameter should match the air outlet diameter. If there is any need of reducing this diameter
use proper reduction connectors. Connection between reduction and the stove must be
sealed. The last phase of connecting the stove with the chimney is assembling the
connection pipe with the chimney.
The chimney must have at least as much air as you need for a normal combustion of the
appliance and the ventilation of the place. Respect the UNI 10683 norm relative to the
ventilation openings.
Basic requirements for chimney pipes, which are used for stove connection are:
- Chimney pipe must have round cross-section area,
- It should be heat isolated and waterproof, made of materials which are resistant to
high temperatures, exhaust emission products,
- It cannot have any reductions or deviations bigger than 30 º,
- For rectangular cross-section the bigger side ratio should not be higher than ½,
- The minimum height of chimney pipe should be 4 meters counting from the place
where fireplace is connected into it,
- It should have washout which allows to gather and remove all remaining of exhaust
process,
- Too big cross-section of the chimney pipe might cause problems with the way how the
device works,
- Too small cross-section area of the chimney pipe might greatly reduce the devices
draft and make it fume.
The under pressure into chimney should be around 10-12 Pa. It should be measured during
the work of the stove. When the under pressure is more than 17 Pa, installation of the
moderator should be considered to lower and stabilize it.

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Figure 1a. Correct connection between the stove and the chimney pipe.
The ventilation grilles must be installed so that cannot be obstructed
Figure 1b. Required chimney heights according to the norm PN-89/B-10425: a) flat roof
covered with any material, b) steep roof with easily ignitable covering, c) steep roof with
non-ignitable, incombustible and flash resistant covering, d) situation of the chimney
nearby another building.
>=0,6 m
<=12o
>=0,6 m
>12o
>=0,3m
>12o
>= 1m
>3m
<=3m
<=1,5m
>=0,3m
>=0,3m
12o
a)
b)
c)
d)

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Note
Safe distance between the internal side of the chimney and combustible elements is at
least 16 cm in case of a brick chimney. In case of steel chimneys, the information is
specified by the manufacturer (X).
Insulated
steel chimney
Combustible
elements
X
Brick
chimney
160
Combustible
elements
Figure 2. Safe distance of the chimney from combustible elements (dimensions in mm).
Safe distance for conducting the connecting pipe (combustion gas pipe) through a
combustible wall is at least 20 cm.
Figure 3. Method of conducting the combustion gas pipe through a combustible wall
(dimensions in mm).
200
200
200
Ściana palna
Rura spalinowa
Wypełnienie
(lekki beton lub wełna) Kryza
z blachy stalowej
Filling (lightweight
concrete or wool)
Combustible wall
Combustion gas pipe
Steel sheet cap

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2.3 Tip of the chimney
The strength and stability of draught in the chimney depend as well on the kind of chimney
tip. It ought to reach above the roof ridge and protect the outlet against rain and adverse
impact of wind (figure 7).
(a)
(b)
(3)
Figure. 4 Example chimney tips: a) prefabricated tip, b) brick version, c) steel tip –so called
chimney cowl.
The chimney tip ought to meet the following requirements:
its internal diameter should be equal to the diameter of the chimney,
usable diameter of the combustion gas outlet is to be twice the size of the chimney
diameter,
it ought to protect the chimney against adverse weather (rain, snow) and foreign bodies,
it ought to be easily accessible for maintenance and cleaning of the chimney,
in case of two adjacent chimneys, tip of one chimney ought to be located at least 50 cm
above the other one, in order to avoid mutual interference of produced negative
pressure (figure 8),
chimney tip ought to be situated 6 m away from any obstructions, such as walls, rocks
or trees according to the local in regulations. Otherwise, the chimney ought to be
extended to protrude approximately 1 m above the existing obstruction. The chimney tip
ought to be situated approximately 1 m above the roof surface (figure 9).
Figure 5. Construction of adjacent chimneys.
Figure 5a. Chimney placement
2 m
6 m
1 m

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2.4 Connection to the external air intake
Figure 6. Connection to the external air intake
The smoke exhaust system must be unique to the insert (Not allowed pipe discharges
common to other fireplace).
Fumes discharged is made from the opening situated at the top. The discharge pipe must be
connected to the outside using appropriate tubes and eventual isolation. Is necessary to use
materials resistant to high temperatures.

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3 Stove operation
Warning!
Modern technology used in construction of the central heating systems guarantee
very high level of safety and reduce maintenance operations to minimum. Beside that
it must be remembered that fire is dangerous element which need a lot of attention.
Using stove remember about safety. The main requirement which guarantee safe
exploitation is regular maintenance of the chimney.
3.1 Lightning
During first run we suggest to operate stove carefully and to use small pieces of dry wood. It
is not recommended to use more than about 4kg of wood.
Under no circumstances for setting up fire do not use: alcohol, gasoline and other flammable
substances.
During first lightning the process of paint curing might produce some strange smell. In this
situation, the area should be vigorously ventilated.
When there is a need to add more wood to stove, the door should be opened slowly to
prevent smoke from coming out.
Wood excess in stove might lead to stove overheat which might damage it.
During stove usage its elements heat to high temperatures. There is a need to take a lot of
attention and all actions connected with stove maintenance should be done in safety gloves.
Remember to keep stoves door closed.
3.2 Flame control
Flame regulation is done by shifters which are on the front of the stove.
Depending on the model the placement of the shifters are: