Vilpra Sauna Fornax VPR-14 User manual

v. 2023-02
Wood-burning sauna stove
Installation and operation manual
Fornax VPR-14
FORNAX VPR-14
Sauna stove shall be installed and operated in accordance with the national legislation and the
requirementssetoutinthismanual.Ifrequirementsinnationallegislationandthismanualvary,it
isnecessary tofollow themore stringentrequirements.

Welcome toVilpraSauna!
We congratulate you on your selection and welcome you to the growing user base of Vilpra Sauna stoves. We have done our best regarding
quality, elegance, and technique so that our products will live up to your expectations. Please carefully familiarise yourself with these instructions
before the installation and operation of the stove. Correct installation and operation help to utilise all the features of the Vilpra Sauna stove enjoyably
and safely, and also assures the longevity of the stove. We wish you pleasant sauna moments!
1. Contents of the package
1. Sauna stove
2. Plug
3. Ashpan
4. Bottom grate
5. Protective glove
6. Chimney connection pipe L-0,15 m, Ø 115 mm
7. Installation and operation manual
2. Technical information
Table 1
Fornax VPR-14
Volume of the sauna room, m3
7-13
Bottom grate
mild steel
Number of flue outlets
2
Flue socket diameter, mm
115
Required temperature class of
chimney
T600
Height + adjustable legs, mm
670 +
0-10
Width, mm
420
Length, mm
440
Weight without stones, kg
50
Load of stones, kg
30-35
Size of stones, cm
Ø5-10
Water tank volume, l
-
Maximum length of wood logs,
cm
34
Max refuelling at a time, kg
3,7
Combustion air setting
Ashpan 50 mm opened

3. Declaration of performance (DoP)
Table 2

4. Installation instructions
Sauna stove shall be installed and operated in accordance with the national legislation and the requirements set out in this manual. If requirements
in national legislation and this manual vary, it is necessary to follow the more stringent requirements.
Sauna stove is intended for heating a sauna. The sauna stove must not be modified without the manufacturer’s consent.
4.1. Before installation
4.1.1. Suitability of the stove for the sauna
Check the suitability of the stove for the sauna, refer to the minimum and maximum volume of the sauna room (Table 1). The heating of the sauna
room depends on the volume and wall materials of the sauna and the heat output of the stove. Please note, that non-insulated wall materials like
bricks, tiles, concrete, and glass increase the heat output requirements of the stove. To ensure sufficient heat output, for every non-insulated wall
surface (glass, concrete, rock) 2 m3must be added to the volume of the sauna during the calculation. If the sauna walls are made of solid timber,
the volume of the sauna room in cubic meters is multiplied by 1.5.
4.1.2. Initial heating of stove outside
The frame of the Vilpra Sauna stove has been painted with heat-resistant paint. During the initial heating, the painted surfaces of the stove may
smoke and give off harmful substances. Because of this, we recommend that the stove is heated outside for the first time. If heating outside is not
possible, ensure efficient ventilation of the sauna room during the initial heating to reduce odours and harmful fumes. The initial heating is always
done without stones, and a metal tube must be installed on the chimney flue prior to heating (minimum 2 m) so that the draft needed for burning is
created. During the initialheating, 1 to 2 loads of wood should be burned; thus, the corrosion-protectivepreservatives are removed from the surfaces
of the stove.
The heat-resistant paint of the stove reaches its final hardness only during the initial heating. Prior to this, rubbing and wiping of painted surfaces
must be avoided and caution must be followed while moving and treating the stove.
The stove may cause smells of paint in the sauna room, which will, however, disappear within a short period of time.
4.1.3. Ventilation of wood-burning sauna
Efficient ventilation of the sauna room is a requirement for an enjoyable sauna moment. Traditional ventilation may be deployed by having the air
supply to the floor level near the stove and by installing an exhaust valve to the ceiling level, as far as possible away from the stove. The stove itself
circulates the air efficiently, in which case the exhaust valve is only needed mainly to remove moisture after sauna.
The air supply air fed to the floor level moves between the hot inside part and the mantle of the stove. The heated air rises through the stove and
heats the sauna room. Because the burning wood needs plenty of air, the fireplace forms a suction that causes circulation with the rising draught
in the sauna room.
4.2. Protection and minimum safety distances to combustible material
4.2.1. Minimum safety distances to combustible material
Sauna stove shall be installed and operated in accordance with the national legislation and the requirements set out in this manual. If requirements
in national legislation and this manual vary, it is necessary to follow the more stringent requirements.
When situating the stove, the safety distances from the sauna structures must be considered for the sake of preventing fires and operational safety.
During installation, the below-mentioned safety distances to wooden walls, sauna benches, and other combustible materials must be complied with.
The minimum safety distances between the stove and combustible material (see Pictures 1 and 2):
- from the stove to the rear wall is 500 mm;
- from the stove to the side walls is 500 mm;
- from the stove to the front wall is 1000 mm;
- from the stove to the ceiling is 1430 mm.
Note! Electric appliances or wires may not be situated within the safety distances of the stove.
See section 5 of this manual for the specific requirements for the installation of the stove VPR-14
together with the Heat shield protection, the Protection under the stove and the Double wall chimney
set.

Front view
Side view
1. Combustible material
2. Sauna stove VPR-14
3. Chimney connection pipe L-0,15 m, d 115 mm (part of sauna stove)
4. Double wall chimney section d115/215, L-1 m (part of Vilpra chimney set)
5. Protection under the stove 485x515
4.2.2. Protection of floor
The floor must be protected with a metal sheet which is placed tightly against the floor and stove.
The protection located at the front of the stove must reach at least 100 mm to either side of the
stove door and 400 mm to the front of the door, see Picture 3.
Valid national fire directives must be complied with. If needed, contact the fire department of your
residential area.
4.2.3. Platform of stove
The stove must be placed on a stable, sturdy non-combustible floor platform. The foundation and floor structure must withstand the weight of the
stove and prevent an excessive increase in temperature in the structures surrounding the stove. When there is a wooden floor in the sauna room,
a concrete slab with a thickness of 50 mm or Vilpra Sauna Protection under the stove must be used. A tiled floor must, if needed, be protected
before the installation of the stove. For this purpose, a Vilpra Sauna Protection under the stove as an accessory is available for purchase at a Vilpra
Sauna merchant.
3
2

4.3. Installation of stove
4.3.1. Adjustable legs
The adjustable feet of the stove help with the installation on an inclined floor surface varying in evenness. The adjustment range of the legs is 10
mm. Ensure that the stove is levelled, and all the adjustable legs are firmly on the floor.
4.3.2. Stove connection to a chimney
There is a flue outlet for the chimney connection both on the top and back of the
stove. A plug is included in the stove package, with which the unnecessary flue
outlet must be tightly closed.
For connection of stove to a chimney follow the safety distances and protection
requirements in the section 4.2 of this manual. T600 temperature class
connecting flue pipes, flue liners or double wall insulated chimneys must be used.
L-0,15 m, Ø 115 mm chimney connection pipe by which the stove is connected
to the chimney flue is included in the stove package. The diameter of the chimney
shall not be smaller than flue socket diameter of the stove, it is optimal when
diameters are equal. The stove is not suitable for installation in a shared flue
system. Follow installation instructions of chimney products. The connection of
the sauna stove to the chimney and chimney installation must be made by a
qualified installer. For the best performance, installation of a damper is
recommended.
We recommend using Vilpra double wall DW50-M Sauna chimney set. When
installing and operating chimney set follow the Vilpra Sauna chimney set
installation and operation manual.
Chimney installation examples are presented in Pictures 2 and 4.
See section 5 of this manual for the specific requirements for the installation of the
stove VPR-14 together with the Heat shield protection, the Protection under the stove
and the Double wall chimney set.

4.3.3. Changing of the opening direction of the door
The opening direction of the stove door may be altered following steps from 1 to 4 (see Picture 5).
4.3.4. Sauna stones
Ensure that the stove is levelled, and all the adjustable legs are firmly on the floor before inserting sauna stones.
Attention should be paid to the choice of the sauna stones. We recommend stones that are of consistent quality and which both properly and safely
fit for usage on the stoves. If needed, the stone dust must be washed away from the sauna stones prior to placing them on the stove. Place large
stones on the bottom of the stone space in a way that air circulates between the stones. The small stones are placed on the top because they
absorb heat efficiently, even when further away from the heat source. The number of stones, together with the temperature of the sauna, affect the
moisture of the sauna. A larger amount of stones and a lower sauna temperature produce more moisture in the sauna.
Note! Do not use ceramics or stones collected from the wild due to possible erosion, decomposition and harmful compounds.

5. Specific requirements for the installation of the stove VPR-14 together with the Heat
shield protection, the Protection under the stove and the Double wall chimney set
The stove installation method described in this section of the manual applies only when the VPR-14 stove is installed together with the following
Vilpra Sauna products:
- Heat shield protection NP, s-1mm, 487x520, L-0.855m (Product code: 98-0231-4952-085-141-V);
- Protection under the stove 485x515 (black structure) (Product code: 98-0018-4952-000-96B-V);
- Double wall chimneys DW50Sauna set CS d.115/215 (product code: SET-CS-DW50Sauna-115-V).
Heat shield protection
Protection under the stove
Double wall chimney set
5.1. Minimum safety distances to combustible material
Minimum safety distances (see Pictures 6 and 7):
- To the rear wall measured from the surface of heat shield protection is 100 mm;
- To the side walls measured from the surface of heat shield protection is 100 mm;
- To the front wall measured from the surface of the stove door is 1000 mm;
- To the ceiling measured from the top of the stove is 1200 mm.
1. Combustible material
2. Sauna stove VPR-14
3. Heat shield protection
6

5.2. Stove connection to a chimney set
When installing and operating chimney set follow the Vilpra Sauna chimney set installation and operation manual. Chimney installation example is
presented in Picture 7.
Front view
Side view
1. Combustible material
2. Sauna stove VPR-14
3. Chimney connection pipe L-0,15 m, d 115 mm (part of sauna stove)
4. Double wall chimney section d115/215, L-1 m (part of chimney set)
5. Protection under the stove
6. Heat shield protection
5.3. Protection of floor
Follow clause 4.2.2 of this manual.
7

5.4. Assembly of the Heat shield protection on the Protection under the stove
1. Loosen the screws (8 pcs.) by turning
them 2 times counterclockwise.
2. Press two sides of the Heat
protection shield together.
3. Put assembled sides of the Heat protection
shield on the Protection under the stove. Cutouts at
the bottom of the sides must fit over the loosened
screws. Tighten the screws (5 pcs.) clockwise.
4. Place the stove on the center of the Protection under the stove.
5. Press the third side of Heat protection shield together. Cutouts
at the bottom of the side must fit over the loosened screws. Tighten
the rest of the screws (3 pcs.) clockwise.

6. Usage of stove
Sauna stove shall be operated in accordance with the national legislation and the requirements set out in this manual. If requirements in national
legislation and this manual vary, it is necessary to follow the more stringent requirements.
6.1. Fuels
Use only dry natural wood logs as a fuel. Maximum refuelling loads and length of wood logs are given in Table 1 and Table 2. The stove must not
be stacked full of wood, avoid overheating the sauna stove. Wood logs must not be stored next to the stove, pay attention to the safety distances.
6.2. Heating the stove
Note! Clean the stove bottom grate and empty the ashpan each time prior to heating the sauna.
Note! Do not heat the stove in a way that the flue pipe glows red, the stove overloads and it shortens the lifespan of the stove.
Note! Parts of the stove, especially the external surfaces, will be hot to touch when in operation and due care is needed to be taken. Use protective
glove, which is included in the package of the stove, for safe manipulation of the stove.
Note! Do not heat the stove without stones, except initial heating of stove outside.
Set the first load of wood loosely by placing the biggest firewood on the bottom and the smaller ones on the top into the firebox, add kindling
between the wood logs and light them. Add the actual refuelling loads when the fire has nearly burned down to embers.
The firebox shall be kept closed except during ignition, refuelling and removal of residue material to prevent fume spillage. Combustion air is brought
into firebox and it is regulated with sliding ashpan. Combustion air settings are given in Table 1. The stove has been designed to perform in most
efficient way when the draught in the flue is as given in Table 2. When the chimney is too long or diameter is too big, this optimal draught limit may
be exceeded. The draught may be adjusted by sliding ashpan or using a damper in case it is installed. A continuous excessive draught will shorten
the lifespan of the stove, as the stove overloads, and the stove becomes red-hot.
After using the sauna, it is recommended to keep a small fire going in the stove to remove moisture from the surfaces of the sauna.
In case of sootfire in the chimney: 1. Slowly close the ashpan and stove door; 2. Contact local fire authority; 3. Do not try to extinguish fire using
water; 4. After a sootfire, the chimney and the stove must be checked by the chimney sweeper before use.
6.3. Sauna water
Clean, fresh water is suitable to be used as sauna water. Ensure that the water is always of sufficient quality: excessive salt, calcium, iron, and
sediments cause corrosion and shorten the lifespan of the stove significantly. Ferrous water may form rust-like spots on the surface of the stove.
Remove the spots by using a stainless steel detergent.
Note! Usage of sea water as sauna water is prohibited. The warranty for the Vilpra Sauna stove does not cover damages resulting from usage of
poor-quality sauna water.
6.4. Sanitation of environment of stove
The stone and metal parts of the stove contain natural features that impact the cleanliness and need for sanitation in the sauna space. It is typical
for the sauna stones to deteriorate over time. Fine granular material may also separate from the steatite that washes away with the sauna water.
The smouldering of the furnace and heat of the stove may also separate minerals and metaldust. Due to the reasons mentioned above, white and
light materials should be kept away from the stove. It also must be ensured that tiling and floor surfaces can endure abrasive materials, high
temperature variations, and have sufficient sanitation. The characteristics mentioned above are features, not defects, and therefore are not covered
by the warranty and liability for damages of the manufacturer.
6.5. Maintenance of stove
The chimney of the stove collects soot and ash over time, which must be removed if needed. Local regulations for chimney sweeping shall be met.
It is typical for sauna stones to disintegrate slowly. Therefore, they must be stacked again once a year, or more often if the sauna is used multiple
times a week. Simultaneously, stone debris collected in the stone space is removed, and crumbled stones are replaced with undamaged ones.
To retain a good draught, the chimney must be swept regularly. The ashpan must be emptied each time prior to heating of the sauna so that the
combustion air through the ashpan cools down the grating, and so ensures a long lifespan. It is recommended to keep a separate ash container
for the ash.
Note! The removed ash may contain burning embers, so store the ash container a sufficient distance from sensitive and combustible materials!
It is recommended to wipe the clear and brushed steel surfaces of the stove with a multi-purpose cleaner to prevent calcium stripes and rust-like
spots.

7. Vilpra Sauna checklist
1. Installation of stove and connection to chimney:
1.1. Only use connection parts designed for this purpose.
1.2. The metal chimney must not just lean on the stove. Attach the metal chimney to the sauna structures.
1.3. The stove must only be attached to a suitable chimney.
1.4. When installing the stove, sufficient distance to structures must be arranged, to ensure free sweeping of the stove. A stove that is connected
to the chimney from the top is swept from the back connection, and a stove connected from the back is swept from the top connection.
2. Initial heating: Smoke and odours.
2.1. The initial heating of the stove is done without stones, preferably outside (using a metal pipe 2 meters in height) or in a sauna room that has
sufficient ventilation. During initial heating, 1 to 2 loads of wood should be burned.
3. Install the stove with the help of the adjustable legs. Ensure that every adjustable leg rests firmly on the floor prior to loading the sauna stones.
4. Sauna stones: Only use suitable washed sauna stones for the purpose. Load the stones again once a year and more often if the sauna is
heated for long periods of time or multiple times a week.
5. If the side hoods and back of the stove heat up excessively:
5.1. Check the chimney joints.
5.2. When heating the stove, a suitable amount of wood must be used in the stove. The stove must not be loaded full of wood –a suitable amount
is 1.5 to 3 kilos of dry wood at a time, but not more than 5 kg/h.
6. The ashpan must be emptied, and the grating cleaned each time prior to heating of the sauna.
7. Sauna water: Preferably, use only clean, fresh drinking water.
8. If the sauna is left cold in the winter:
8.1. Remove the stones from the stove.
8.2. Clean the stone space and grating.
8.3. Empty the ashpan and water tank.
9. Fire safety:
9.1. Ensure the safe installation of the stove by reviewing the latest instructions from the local fire authority prior to installing.
9.2. Regularly check that the plug for closing unnecessary flue outlet of the stove (on the top or on the back of the stove) is in place.
9.3. Regularly clean the stove, flue gas connector and the chimney flue and check for blockage prior to re-lighting after a prolonged shut down
period.
9.4. It is recommended for regular maintenance by a competent engineer.
8. Warranty
Vilpra sauna stoves have a manufacturer’s warranty of 36 month after the date of purchase. The warranty cover manufacturing defects. Damages
caused by incorrect use or use which is not in accordance with instructions are not covered by the warranty.
9. For safety
Prior to installing the stove, review the up-to-date safety distances and directives.
The sauna may not be used to dry clothes or as a room to dry laundry.
Beware of the hot stove as the stones and metal parts heat up and become burning hot. Beware of steam rising from the stove, to prevent burns.
We recommend supervision of children, disabled and sick people while using the sauna. Move carefully in the sauna as the benches and floor may
be slippery.
Do not enter the sauna under the influence of alcohol, drugs, or intoxicating agents.
Please note that insufficiently loaded stone space creates a fire risk.
Never cover the stove.
All rights are reserved by UAB Vilpros pramone. All information provided in this manual is owned by UAB Vilpros pramone.
Copying or distribution of the information in this manual without a written consent of UAB Vilpros pramone. is prohibited.