SAUNACORE CTY-WS12 WS12 Wood-burning sauna stove Installation and Operation Manual
The CTY-WS12 is a wood-burning sauna stove designed for heating smaller saunas and barrel saunas. It is intended for generating dry or moist steam, and features a trapeze-shaped outlet flue with an after-burning chamber for efficient heating. The stove is built with double walls to reduce safe distances, and has a vent system for efficient air circulation, ensuring a fast rise in steam room temperature. It comes with a metal housing, but the metal plate can be changed for a glass plate or vice versa.
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CTY-WS
12
INSTALLATION AND OPERATION
MANUAL FOR
WOOD-BURNING SAUNA STOVES
EN 15821:2011
2
Please carefully consider the capacity of the sauna stove. Low heating effi ciency results in having to heat the sauna stove longer and more intensely, which, in turn, reduces its service life. Resellers as well as the representative of our factory will be happy to assist you in choosing the appropriate sauna stove. For more information, visit our website at
Dear Client
You have purchased a high quality sauna stove, which will guarantee you sauna pleasures for many years. The purpose of this installation and user’s manual is to provide you with detailed information. Please pay attention to important information and data related to fi re safety. First of all check whether the delivered sauna stove is intact. In case any damage is caused during transportation, please inform the transport company or consult the supplier, who sold you the device.
Application
The models of this sauna stove are meant to be used for heating smaller saunas and barrel saunas and intended for generating dry or moist steam.
The manufacturer confi rms that the sauna stoves comply with the requirements of the corresponding CE compliance certifi cate and are produced according to EN 15821:2011-01 standard. The certifi cate of conformity is available in Table 1.
The sauna stove is built for heating the steam room in the sauna. Other applications that differ from the purposeful use are considered non-purposeful. Regular maintenance and the service of the stove form a part of purposeful application. The manufacturer shall not be held liable for unauthorised changes executed by the user of the sauna stove, or damage caused due to it. The risk of damage and expenses caused due to the nonpurposeful application shall be covered by the person, who made unauthorised changes in the device.
Safe distance from flammable materials/surfaces (cm)
Distance from the side wall (cm)
Distance from the back wall
(cm)
Distance from the stones to the ceiling (cm)
Distance from the flue to the ceiling (cm)
Thickness of the insulation layer under the stove (cm)
Distance from the metal stove door to the front wall
(cm)
Distance from the glass stove door to the front wall (cm)
Efficiency
CO emission
%
Vol.% - 13% O²
Heat power
Temperature of the flue gas
Pressure
Amount of the flue gas
Duration and fire safety test kW
°C
Pa kg/h
C TY -WS12
series
50
65
70,5
0,23
9,1
314
12
3,0
25
15
124
108
4
Passed
Table 1. CE certifi cate of conformity
3
General information
Optimal sauna climate is achieved only when there is natural ventilation in the steam room: the inlet of fresh air has to be under the sauna stove near the fl oor (marked by letter
A in Figure 1), and the outlet has to be by the ceiling (marked by letter B in Figure 1) as far as possible from the stone hearth. The purpose of the opening by the ceiling is to remove moisture from the steam room emitted during sauna procedures. A heated sauna stove by itself ensures effi cient air circulation. The stove heats the steam room with convection streams: cold air is blown in through vents and the air warmed by the heated stove rises up. A part of the warmed air is pressed into the steam room via vents. This is the typical way to increase the temperature of the steam room, reaching up to 100 ºC below the ceiling and remaining on the level of 30-40 °C on the fl oor. Due to that it is usual that when temperature is 100 °C below the ceiling of the steam room, the thermometer placed 20-25 cm below the ceiling shows the temperature of only 80 °C. The best steam temperature range on the upper bath-house platform is between 80 °C to 90 °C.
B
4
Figure 1. Natural ventilation cm
A
Important information
Incorrect installation of the sauna stove may cause fi re hazard. Please read through the installation and the user’s manual carefully before the installation and use of the sauna stove. During installation it is very important to apply safe distances from the sauna stove and follow the instructions as follows:
The sauna stove is installed in a room especially built for the purpose.
The sauna stove is not used for business purpose.
The installed sauna stove has to be of appropriate output.
Natural ventilation, compliant with requirements, has to be installed in the room.
The sauna stove may be used by a person who has suffi cient experience and/or skills.
Ensure permanent supervision of children to avoid their being near the heated sauna stove all alone.
For heating the sauna use only appropriate fi rewood meant for heating the steam room
(low pitch content, unprocessed timber – for the energy content of different fi rewood see
Table 2).
Caution: Wrong installation of the stones of the sauna hearth and/or a covered sauna hearth may cause fi re hazard.
Before heating the sauna, be sure that there are no unnecessary things near the stove.
The operating sauna stove works on high temperature and any contact with it may cause serious burns.
Do not forget to open dampers of the gas fl ue or the chimney before heating the sauna.
Avoid overheating the stove. Check that the side and back walls of the stove (not the housing) and the gas fl ue would not become red.
In case of fi re call the emergency service immediately by emergency number 911.
No electrical appliances or wires are allowed in the safety zone of the stove.
The sauna stove must not be connected into a distributed smoke gas system.
Lamps in the steam room must be spray-proof and tolerate temperature up to 140 ºC.
The ash compartment of the sauna stove has to be shut during burning (except during ignition).
Please follow the sauna stove manufacturer’s requirements and product-based special requirements.
Wood / type of fuel
Ash logs
Birth logs
Conifer logs
Alder logs
Aspen logs
Gray alder logs
Moisture content %
20
20
20
20
20
20
Table 2. Energy value of fi rewood
Energy value kWh/rm
1650
1500
1300
1200
850
700
5
6
1. Ash compartment
2. Ash grate
3. Furnace
4. Vent
5. Beginning of the gas fl ue
6. Smoke channel
7. Maintenance port
8. End of the smoke channel
9. Opening of the smoke fl ue
Figure 2. Cross section of the stove
CTY-WS12
5-12 70,5 40 20 35
C
B
A
Description of the sauna stove
The sauna stove is covered by a metal housing. The sauna stove has three (on sides and at the back) double walls, which enable to decrease the safe distances. The stove consists of a furnace with an ash compartment under it and a compartment for stoves for the sauna hearth on top of it with a trapeze-shaped outlet fl ue in the middle. An afterburning chamber is located at the end of the outlet fl ue. A narrow cast iron furnace grate is installed between the furnace and the ash compartment. The door of the furnace and the grate are placed so that they form a threshold that prevents fi rewood from falling out. The air needed for burning comes in through the ash compartment and the grate. The after-burning chamber is equipped with a fl ue ( Ø 11.5 cm), which opens into the chimney on top of the stove. The trapeze-shaped outlet fl ue is equipped with two cleaning-out openings. There is a 5cm gap between the sauna stove and the housing via which the air moves upwards when the stove is heated. The gap is covered with perforated sheet iron on the top. The openings in the iron sheet create air whirls which prevent air outfl ow. Due to that some of the air is directed through the vents located in the sides and the back of the stove walls so that the air is directing through the stones of the hearth between the stove ceiling and the fl ues. Via the vents the air moves the through the stones of the hearth and between the fl ues warming the stone additionally. Thanks to this kind of ventilation the air in the room is heated intensively and rises to the intended temperature level in the steam room within a short time. In all models it is possible to change the metal plate for a glass plate or vice versa.
CTY-WS12 model has an extra-accessory, which is a decorative bar for covering the wall around the stove door, which is placed around the opening up to 3.5 cm on top and on both sides. Decorative bars are made of black metal painted black and of stainless steel.
Putting into operation for the fi rst time
The housing of the sauna stove is covered by heat resistant paint, which reaches its fi nal hardness during the fi rst heating procedure. Up to that time avoid scratching the painted surfaces of the sauna stove. During the fi rst heating the paint softens at fi rst due to which contact with the painted surfaces has to be avoided. Substances evaporating from the painted surfaces may give off unpleasant smell and due to that the fi rst heating may be done outside or in a well-ventilated room on the installation site of the sauna hearth. After heating the hearth in the steam room for the fi rst time, you defi nitely have to ventilate the room. The sauna stove is heated for the fi rst time without hearth stones being installed.
Also water must not be thrown on the housing of the sauna stove during the fi rst heating.
When heating the sauna stove outside, it is recommendable to install the sleeves to eliminate the smell of the emitted substances.
Place of installation
When choosing a place for the sauna stove also the safe distances and distances required for maintenance have to be considered besides the measurements of the stove. In front and towards the depth of the furnace at least one metre radius of space is required for maintenance. The sauna stove has to be installed far enough from infl ammable materials
(see Table 1). Discharge fans installed in the steam room may affect the operation of the sauna stove.
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Protection of walls
When wooden walls (wooden boards, planks, logs, etc.) are closer to the stove than allowed according to safe distances, the walls have to be protected by installing required materials (heat barrier). Single-layer heat barrier is made of at least 7-mm thick fi brereinforced non-fl ammable concrete plate or at least 1-mm thick metal plate.
There has to be an adequate number of fi xing points to ensure the strength of the construction. A single-layer heat barrier equals to at least 5.5-cm thick brick wall. The wall has to be with open edges and at least 3 cm away from the protected surface reaching 60 cm beyond the total area of the sauna stove and be at safe distance from the side walls
(at least 50 cm).
Protection of fl oors
If a sauna stove is installed on a fl oor made of fl ammable material (wood, plastic or other), at least a 4-cm thick concrete base has to be made on the fl oor to protect it from heat. For example, the used material may be Slica 250 KM. The base has to reach beyond the stove on sides at least 20 cm and at least 30 cm in front. The base plate should be installed a little bit higher of the fl oor to keep the wooden fl oor dry. Detailed fi re precautions are delivered by the local fi re service offi cial, who also coordinates the installation of the sauna stove.
Connecting the sauna stove in the laid fl ue
The area of the cross-section of the chimney fl ue must not be smaller than area of the cross-section of the stove fl ue.
There is a smoke vent on the stove. The opening required for connecting the fl ue is measured on the base of the chimney and is made a litter bigger than the fl ue pipe. Finally the fl ue pipe connected to the base of the chimney is sealed with fi re-proof with rock wool.
Appropriate sealing gap around the pipe is about 1 cm.
The inner corners of the fl ue opening have to be rounded to ensure free entrance of smoke.
The fl ue connection pipe must not be pushed too deep into the fl ue. If necessary, the smoke pipe has to be made shorter.
First fi x the fl ue connecting pipe in the smoke vent of the sauna stove. After that the tightness and strength of the connection has to be checked. The stove is placed in the fl ue opening and is pushed in the direction of the fl ue. The connecting pipe has to be wrapped in fi re-proof rock wool and be pushed into place in the stove. It may be necessary to add fi re-proof rock wool when checking the tightness of the sealing of the fl ue connection. If the sealing wool is deep in the base of the chimney (deeper than 1 cm), the wool may be covered with a layer of plaster or a decorative bar of the smoke pipe. Using a damper in the connection of the sauna stove with the chimney is not compulsory.
Maintenance of the sauna stove
8
The manufacturer expects that the sauna stove is maintained by a competent specialist. The soot deposited on the smoke channels of the sauna stove are removed via round maintenance trap doors located on the sides of the stone sockets. The smoke outlet and the fl ue have to be cleaned regularly. The device has to be checked also when it has not been used for a longer period.
Stones may crumble when used and that is why they have to be piled again at least once a year (more often if used intensively). Stone rubble that has gathered in the lower part of the stove has to be removed and broken bricks replaced. The fl ue has to be cleaned regularly to ensure proper ventilation.
The ash compartment has to be cleaned before every use to ensure air access from the ash compartment through the grate. A metal container should be used for removing the ash. The user of the sauna stove needs at least 1 m2 of space in front of the stove.
Do not keep the ash container near fl ammable materials as the removed ash may contain smouldering fi rebrands.
Hearth stones
Stones of the hearth must not block the air circulation between the centre of the hearth and the housing.
Some natural stones may contain improper substances such as sulphur compounds, which make them unsuitable for the use as hearth stones.
Clean the stones from dust before you pile them on the hearth. Bigger stones are laid at the bottom of the stone base; smoother stones are piled along the walls of the stone base. Smaller stones are laid out on top because they are heated up quickly. The humidity of the steam depends on the amount of stones and the temperature of the sauna. The more stone and the lower temperature, the more humid the steam is.
Heating the sauna stove
Dry fi rewood is the best for heating the sauna stove. Fuels of high heating value should not be used for heating the sauna, e.g. fi breboard, plastic, plywood, charcoal, etc. Liquid fuels must not be used in any case. It is recommended by the manufacturer to fi ll only half of the stove with fi rewood. Filling the furnace at full extent may cause overheating. This shortens the service life of the sauna stove signifi cantly.
The ash compartment may be open only during starting the fi re to enable the access of additional air needed for burning. During heating the ash compartment has to be closed, except when adding fi rewood or removing the ashes, to avoid smoke spreading into the steam room.
Heating the steam room depends on the size of the room, the placement of windows in the steam room, power of the stove and the material of walls. In case of non-insulated wall surfaces (brick, ceramic plate, concrete, etc.) a powerful stove is required: per every m² of the wall 1.2 m³ of additional capacity is needed. In case of log walls the capacity is multiplied by 1.5. A properly chosen sauna stove heats the steam room up to the required temperature within 1 (one) hour.
Water for steam
Clean water is used for making steam. Salty, hard or water rich in iron causes corrosion and shortens the service life signifi cantly.
Warranty conditions
The manufacture undertakes to exchange or repair a defective stove within 12 months from the date of sale in factory or shop on condition the consumer has not failed to follow the requirements of the installation and the user manual. The warranty is effective on condition the stove is used for its intended purpose and the manufactured construction is not changed. If the door glass of the sauna stove is broken, the manufacture is not obliged to change it.
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SAUNACORE
WWW.SAUNACORE.COM
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Key features
- Trapeze-shaped outlet flue with after-burning chamber
- Double walls for reduced safe distances
- Vent system for efficient air circulation
- Fast rise in steam room temperature
- Metal housing with interchangeable glass plate