Narvi Velvet
Contents
1. s smoke flue from the back If the connection with the smoke flue is done from the above a Kota connective flue or Kota smoke flue must be used In case of connection from the above a Kota smoke flue tank for heating water or a Kota stone basket can be installed around the connective flue To remove the cover of the ex ternal housing at the rear connection of the heater move the cover back and forth at the opening Do not push the connective flue too deep in the smoke flue because this would hinder the draft Any leaks in the con nective flue also reduce the draft therefore the connections must be sealed with fireproof sealing material Leakage in the connective flue causes combustion gases formed in the sauna heater to ignite in the flue The connection joint of the flue and the sauna heater must be 25 mm The diameter of the connective flue of the sauna heater and the height from the floor are shown in clause 1 1 Please take into account the clearance distance of the modular smoke flue see the manufacturer s instructions NARVI Oy Yritt j ntie 14 FI 27230 Lappi tel 358 0207 416 740 fax 358 0207 416 743 www narvi fi en 3 4 Installation of a door and changing of the Opening direction of the door Figure 7 Figure 7 Open the door and raise the hinge pin up so it comes out of the bottom hinge barrel Hold onto the door securely and turn the bottom part of the pin and turn the bottom end of the pin up enough 2 t2. www narvi fi en 2 Before you install the sauna heater Before installing and using the sauna heater make sure you are thoroughly familiar with the requirements for installing the sauna heater in the steam room In case of questions and for additional information do not hesitate to contact the Rescue Board or a construction supervision authority When installing fireboxes all local laws have to be followed including those referring to local and European standards 2 1 Steam room If the walls of a steam room are made of uncovered glass brick or concrete add 0 8 1 5 m3 per square meter of such wall and the final choice of the heater shall be made based on the sum of the area If the heater is installed in a sauna that is normally not heated or the sauna is made of mas sive logs multiply the sauna area by 1 5 and choose the heater based on this The recommended minimum area of a steam room is indicated in clause 1 1 Please follow the values for the minimum area stipulated for a steam room We recommend choosing a sauna heater with slightly more power to ensure proper heating of the sauna and to avoid heating the sauna heater to its upper limit Slightly stronger power ensures a longer lifetime of the sauna heater and provides better steam thanks to a greater quantity of stones 2 2 Substrate A firebox must be installed on the floor with sufficient load bearing capacity The durability of the floor must be checked especially
3. The weight of the smoke flue must not cause load on the sauna heater The sauna heater should be con nected to a separate smoke flue A smoke flue made of bricks must be at least the so called half brick smoke flue 2 5 Ventilation Ventilation of the steam room should be sufficiently effi cient and should function so that fresh incoming air is rout ed as close to the sauna heater as possible Also proper air circulation has to be provided in the steam room during using the sauna so that air can exit from under the sauna bench or from under the door of the washing room suf ficient gap Extraction fans working in the same room as the firebox may cause problems Incoming air inlets should be located so that they do not get blocked for instance because of snow A firebox needs combustion air in a volume of 6 10 m3 per kilo of fired wood The diameter of the ventila tion opening must be at least 100 mm Forced air system should be built according to the design prepared by the designer of the heating water and ventilation systems After using the sauna there shall be a possibility to ventilate and dry the sauna rooms so that air exits via the upper part of the steam room n r aires Tom A UU J y uud h i m L KIN N a VI NARVI Oy Yritt j ntie 14 FI 27230 Lappi tel 358 0207 416 740 fax 358 0207 416 743 www narvi fi en 3 Installation and preheating of the sauna heater 3 1 Preheating Before u
4. carefully when the sauna heater is in stalled on a wooden floor The weight of the sauna heater is shown in clause 1 1 CONCRETE FLOOR The sauna heater may be installed directly on a concrete floor which is at least 50 mm thick FLOOR MADE OF COMBUSTIBLE MATERIAL OR A TILED FLOOR UN DERFLOOR HEATING As the heater has a double bottom thermal radiation reaching the floor is less than normal in case of wooden heaters During tests the temperature under the heater is less than 50 C But still when the heater is installed with out a special installation base the heat resistance of mate rials used in the floor structure has to be verified If needed a Kota installation base has to be used to protect the floor 2 3 Safety clearances When installing the sauna heater safety clearances must be taken into account Ignorance of safety clearances causes a fire hazard If required additional information can be obtained from the regional branch of the rescue board NARVI Oy Yritt j ntie 14 FI 27230 Lappi tel 358 0207 416 740 fax 358 0207 416 743 www narvi fi en 2 3 1 Structure made of combustible materials The safety clearances are the minimum allowable dis tances between the sauna heater and structures made of combustible materials Please observe the stipulated re quirements regarding walls floors sauna benches other inventories and storage areas of firewood Structure Safety clearance Top surface 1220 mm
5. in the sauna Dur ing first times we recommend using less firewood for achieving the desired temperature than values present ed in the table Maximum quantity of firewood per hour max kg h indicated in the table must not be exceeded Heating of the sauna Velvet sauna heater 1 firebox of firewood guantity of firewood kg 4 5 opening of the ash drawer mm 25 1 addition guantity of firewood kg 2 5 opening of the ash drawer mm 10 1 addition guantity of firewood kg 2 5 opening of the ash drawer mm 10 1 addition guantity of firewood kg 2 5 opening of the ash drawer mm 10 max kg h 8 sticks of firewood with a diameter around 5 cm length around 33 cm and weight around 0 5 kg Do not stack firewood in the firebox over 2 3 of its height Ouantities of firewood are shown in clause 4 1 In the igni tion phase the ash drawer can be kept open by 10 mm Narvi mm more than indicated in the table After igniting put the ash drawer back in the position as shown in the table In a sauna heater equipped with a water tank or in a sauna heater that is heated from another room firewood should not be burnt in the front part of the firebox in the exten sion but the firewood must be placed entirely on the grate of the firebox Do not forget that the sauna heater and its part become very hot during heating If you need to touch the parts of the sauna heater always use protective gloves When mov
6. sauna heater must not be used without air flow adjusting plates N a ly i NARVI Oy Yritt j ntie 14 FI 27230 Lappi tel 358 0207 416 740 fax 358 0207 416 743 www narvi fi en 4 Using the sauna heater 4 1 Firewood Both hardwood and softwood can be used to heat the sauna heater The use of chipboard fibreboard painted or impregnated wood waste or plastic is prohibited To ensure clean burning and the largest possible efficiency the wood must be dry The moisture content of the wood must be less than 20 Usually good firewood is sticks of wood the diameter of which is around 5 cm length around 33 cm and weight around 0 5 kg Use of liquid fuel is strongly forbidden also during firing 4 2 Heating Before heating make sure that there is no combustible material within the safety clearances Also make sure that the ash drawer and fire grate are clean and if the sauna heater is provided with a water tank that it is filled with clean water Check if there is sufficient draft in the smoke flue If you hesitate regarding the draft check it by burning a small quantity of water in the firebox first During heating the door of the firebox must be closed and the water tank must be filled with water The sauna heater must not be covered with anything To start heating pile firewood over a sufficiently wide area and ignite it from above For ignition you may use birch bark or paper Ignition aid should be placed between the
7. upper firewood and it can be topped with some thinner wood sticks or firewood see drawing 9 Igniting from above reduces pollution and ensures cleaner burning The power of the sauna heater can be regulated by the ash drawer If the ash drawer is closed the power of the sauna heater is at its lowest and the burning time is longer If it soughs too much in the sauna heater reduce the draft To do this close the ash drawer halfway or completely This way heat reaches better in the sauna heater stones can store heat and you do not just heat up the flue A calm flame is a sign of a correct draft Avoid heating the sauna heater so that the channels of the stone compartment glow red for a long time because this will overload the firebox and the service life of the sauna heater will be reduced Overheating may also cause excessive heating of the smoke flue and cause a fire hazard The connective flue pipe must not be glowing red NARVI Oy Yritt j ntie 14 FI 27230 Lappi tel 358 0207 416 740 fax 358 0207 416 743 www narvi fi en Figure 9 Properly stacked firewood The following table shows the recommended quantities of firewood for different types of sauna heaters and po sitions of the ash drawer The values shown in the table meet the values of the nominal power pursuant to standard EN15821 In the test the size of the sauna was determined based on the maximum area for the given sauna heater and temperature of 90 C was achieved
8. Front surface 500 mm Side surface 150 mm Back surface 200 mm We recommend leaving 1000 mm maintenance area in front of the sauna heater The safety clearance can be reduced by 50 when a single light protective screen is used and by 25 when a double light protective screen is used Yet the gap between the sauna heater and the protective screen must always be at least 50 mm The safety clearance between the sauna heater and the ceiling can be reduced by maximum 300 mm when a single protective screen is used It is not per mitted to use a double protective screen in the ceiling A single light protective screen can be made of a non combustible fibre reinforced cement plate that is at least 7 mm thick or a metal plate that is at least 1 mm thick which is attached to the wall sufficiently tight An air gap of at least 30 mm must be left between the surface to be protected and the board A double protective screen can be made of the two abovementioned boards Ain air gap of at least 30 mm must be left between the boards and the wall There must be a gap between the protective screeds and the floor and ceiling so that air can circulate and cool the gaps between the boards 120 mm masonry structure at a distance of 30 mm from the surface to be protected corresponds to a double protective screed We recommend using factory made double Kota protective screeds Protecting a wall made of combustible material If the sauna heater is installe
9. d on a floor made of combustible materials an installation base must be used A piece of sheet metal must be installed in front of the installation base which extends at least 100 mm over the sides of the heater hatch and at least 400 mm in front of the sauna heater The sheet metal edges facing the sauna heater must be turned up so that coal cannot get under the installation base We recommend that the iron sheet with turned up edges reach under the front feet of the heater Also read clause 2 2 A floor made of combustible material or a tiled floor underfloor heating Please observe that the safety clearance of an uninsu lated smoke flue from structures made of combustible materials is 1000 mm or any other distance stipulated in the manufacturer s instructions 2 3 2 Non combustible structure If the wall is masonry or other structure classified as non combustible it is sufficient to have a 50 mm air gap be tween the upright surfaces and the wall 2 4 Smoke flue A smoke flue of the sauna heater must meet the require ments of class T600 irrelevant of the material of the smoke flue The minimum recommended draft of the smoke flue is 12 Pa A modular smoke flue must meet the requirements of class T600 and provided with CE marking When installing a modular smoke flue safety clearances stipulated in the in stallation manual of the smoke flue shall be followed The minimum recommended diameter of a modular smoke flue is 120 mm
10. eave the ash bucket standing by the wall for instance on the terrace If the smoke flue is equipped with a closing pan it should be opened for the time the ash is removed Dust will escape with the draft 4 5 Maintenance of the sauna heater Besides removing the ashes and having the chimney annu ally cleaned by a chimneysweep the sauna heater requires no other maintenance To open the cleaning hatch of the sauna heater the upper stones have to be removed from the sauna heater The stones of the sauna heater have to be re arranged once per year and replaced every other year Cracking stones collapse and fall lower some stones will erode Re move eroded and broken stones Due to insufficient main tenance the sauna heater needs more time for heating which in its turn causes load on the structure of the sauna heater The enamel surface of the sauna heater should be cleaned regularly with a damp cloth Also the water tank of the sauna heater should be regularly cleaned Use only clean water to fill the tank If there is a dan ger that water can freeze the water tank should be emptied 4 6 Disposal For disposal take the sauna heater to a public waste recy cling centre NARVI Oy Yritt j ntie 14 FI 27230 Lappi tel 358 0207 416 740 fax 358 0207 416 743 www narvi fi en 5 Soot fire IN CASE OF SOOT FIRE ALSO IF IT HAS ALREADY BEEN EXTINGUISHED ALWAYS INFORM THE EMERGENCY CENTRE If you detect soot fire in t
11. er manual contains the technical data of your sauna heater and in stallation use and maintenance instructions The products are meant only to be used as a sauna heater and for heating the sauna Do not modify the design of the sauna heater and use only spare parts and accessories recommended by the manufacturer The data plate includ ed in the delivery of the sauna heater must be glued on the sauna heater preferably on the lower part of the cover of the sauna heater Do not heat the sauna heater if you lack sufficient knowl edge if you are not allowed to use a sauna because of your health condition or you are under the influence of substances causing intoxication Sauna heaters must not be used by underage people Do not leave children in the sauna without supervision A sauna is not meant for drying clothes 1 1 Technical data Narvi Velvet 20 Height mm 780 Adjustment range mm 15 Width mm 540 Depth without handle mm 580 Diameter of the connective flue mm i Distance of the bottom edge of the 600 connective flue from the floor mm Central point of the connection from the above from the rear edge 160 of the sauna heater mm Weight without stones kg 89 Weight of the stones 5 10 cm kg 100 Weight of the stones 10 15 cm kg 60 Size of the steam room m 8 20 m Tulipesan katto mm 10 cp N a ly N NARVI Oy Yritt j ntie 14 FI 27230 Lappi tel 358 0207 416 740 fax 358 0207 416 743
12. g pan after heating check that there is no glowing coal in the firebox Otherwise fumes may be released in the sauna Carbon monoxide is an odourless and colourless toxic gas If you have not used the sauna heater and smoke flue for a longer period or it is cold please check before use that the smoke flue is in proper order and that there are no cor rosion damages on the sauna heater Start heating very slowly and with small quantity of firewood so that not to damage the smoke flue 4 3 Steam water Use normal domestic water for steam water Quality requirements for domestic water humus content 12 mg l iron content lt 0 2 mg l calcium content 100 mg l manganese content 0 05 mg l Do not use sea water or other salty water Also do not use water containing chlorine The warranty of the sauna heat er does not cover damages caused by the use of unsuit able steam water Do not throw water on the stones if you yourself or somebody else is right next to the sauna heater Hot water steam may cause burns 4 4 Removing the ashes The ash drawer must be emptied every time before heating the sauna heater The ash drawer must be emptied imme diately if ashes fill more than half of the drawer Otherwise the airflow through the firebox grate will be hindered which will shorten the life of the grate The ash drawer must be emptied in a non combustible container for instance metal bucket after ash has cooled down Do not l
13. hat you can pull the pin down 3 and the pin and door come apart For instal lation proceed in reverse order First push the upper edge of the door in its place and thereafter push the pin through the upper eyelet Thereafter turn the door and pin in their places from below and let the pin into the bottom eyelet The pin is correctly installed when the wider areas of the pin are facing down In this case the pin cannot move away from its place Door installation is easier when you use long flatnose pliers 3 6 Sauna heater stones We recommend that you use Kota olive dolerite stones Natural stones are not suitable to be used as sauna heater stones 10 15 cm Before using the stones they must be washed to eliminate any impurities Bigger stones are placed in the bottom of the stone compartment and the rest are piled sparsely so that air can move freely between the stones Flat stones shall be stacked in upright position The stones must not block air openings and stones must not be stacked over the top surface of the sauna heater The recommended quantity of stones in the sauna heater is shown in clause 1 1 The use of stones with a regular shape rectangular etc and light or ceramic stones is forbidden because of a risk of too tight stacking 3 Air flow direction adjusting plates of the sauna heater NARVI VELVET AIR FLOW DIRECTION ADJUSTING PLATES The position and condition of the plates must be regularly inspected A
14. he smoke flue close the ash drawer and the door of the firebox immediately After soot fire and before the next use of the sauna let a chimney sweeper check the condition of the smoke flue and the sauna heater 6 Frequently Asked Questions The sauna heater is drafting poorly e The sauna heater has not been used in a long time the smoke flue and sauna heater are damp e The sauna heater is not receiving sufficient air there is a downdraft in the sauna caused by ventilation e The sauna heater has not been cleaned in a long time e The ash drawer is closed or full of ashes e Leakage in the connective flue The sauna does not heat up properly e The firewood is damp e The sauna heater has insufficient power e The sauna heater or smoke flue is drafting poorly e The stones of the sauna heater are dirty or crumbling or stacked too tightly e There are too many stones or there are too many small stones The sauna heater smells e The sauna heater has not been properly heated the first time it was done e The stones of the sauna heater were not washed before loading e Fat or other dirt has accumulated on the stones e Steam water is not clean T Warranty Pursuant to consumer protection legislation Narvi sau na heater s warranty period is two years The warranty covers normal family use provided use installation and maintenance meet the requirements stipulated in the instructions The warranty period starts for
15. ing around in the sauna be careful because the floor and the ceiling of the sauna may be slippery One firebox of firewood burns approximately half an hour A good time for adding firewood is when there are still some blue flames on the coal in the firebox Before adding firewood you may even slightly smooth coal on the grate If firewood is added in the flames too early the temperature of fume gases increases Do not use the door to push fire wood in the firebox In case the sauna is used or the sauna heater is heated also after the recommended number of times firewood should be added as shown in the table firewood should not be added according to the quantities mentioned in the table A proper quantity for keeping heat is 1 2 logs ap proximately 1 kg of firewood every half an hour The ash drawer may be closed a bit If you add a big quantity of firewood the temperature of flue gases rises and this can damage the smoke flue and cause a fire hazard But do not heat continuously over 3 hours Thereafter the sauna heat er must be allowed to cool down before the next heating In case the sauna will not be used any longer and coal is still glowing without flame extinguishing can be speeded up by increasing the draft For this open the ash drawer by 10 20 mm There is enough heat accommodated in the stones of the sauna heater to dry the sauna room In the ignition phase the closing pan must be fully open Before you close the closin
16. m the moment that the goods are delivered to the end user The supplier is not liable in any way for any defects within the framework of NARVI Oy Yritt j ntie 14 FI 27230 Lappi tel 358 0207 416 740 fax 358 0207 416 743 www narvi fi en the warranty or other defects that appear later than two 2 years after the delivery of the goods to the client The supplier may decide to either repair the defective goods or replace the defective goods at its own direction The warranty does not cover possible transport unloading or installation costs or other corresponding costs A receipt from the company selling the product serves as proof of warranty The client must check the goods immediately after deliv ery The client must submit a written notice of claims to the supplier within two 2 weeks of discovering the defect or the moment when the defect should have been discovered Do not modify the structure of this product With this prod uct you can only use manufacturer recommended acces sories Failure to comply with the manual or fire safety reg ulations can result in a fire or damage to the sauna heater More detailed information about the fire safety regulations can be obtained from the regional branch of the rescue board for instance The product shall be carefully inspected Improper use of the product is for instance wrong adjustment of the draft too large a quantity of firewood burnt in the firebox too long heating time
17. se and arranging the stones the sauna heater must be heated to remove the protective agents Any pro tective films and stickers must have been removed before Preheating shall be carried out on a non combustible surface and outside since paint emits harmful solvents and smoke during heating Use of a connection pipe in cluded in the delivery of the sauna heater in the upper joint improves draft during preheating 1 2 fireboxes of wood are sufficient for preheating After preheating and before arranging the stones loose cover material should be re moved from the stone compartment of the sauna heater with a steel brush In case the external surface of the sauna heater is painted it should not be rubbed or wiped before the first heating The paint of the sauna heater will achieve sufficient strength only after the first heating Do not create steam during the first heating 3 2 Regulation of the height The legs of the sauna heater are adjustable and can be used for levelling the sauna heater and for adjusting the height There must be an air gap of at least 25 mm between the sauna heater and the floor Use a spirit level to check if the sauna heater is level 3 3 Connection with the stack The sauna heater can be connected to the smoke flue from the top or back of the sauna heater Seal the unused open ing with the supplied cover The sauna heater comes with a short smoke flue connection pipe which can be used to connect the sauna heater
18. version 1 2 INLAND mant NGVY VI Narvi Velvet Installation user and maintenance instructions Made by NARVI Oy Finland NI a ly N NARVI Oy Yritt j ntie 14 FI 27230 Lappi tel 358 0207 416 740 fax 358 0207 416 743 www narvi fi en 1 1 2 1 2 2 2 3 2 4 2 5 3 1 3 2 3 3 3 4 3 6 3 7 4 1 4 2 4 3 4 4 4 5 4 6 NARVI Oy Yritt j ntie 14 FI 27230 Lappi tel 358 0207 416 740 fax 358 0207 416 743 www narvi fi en Table of Contents Technical data 4 Before you install the sauna heater 5 Steam room 5 SUDSUATG eee 5 Safety clearances s 5 Smoke flue 6 Ventilation 6 Installation and preheating of the sauna heater 7 Preheating t T Regulation of the height 7 Connection with the smoke flue 7 Installation of a door and changing of the opening direction of the door T Sauna heater stones 8 Air flow direction adjusting plates of a sauna heater Using the sauna heater 9 FirewOOd ec 9 PIS AMO MINER RERO 9 Steam water 10 REMOVING the ashes 10 Maintenance of the sauna heater 10 Disposal 11 Soot fire e 11 Frequently Asked Ouestions 11 Warranty 11 Narvi Velvet Introduction Thank you for having chosen a Narvi Velvet sauna heater To make the most of your sauna heater please read the manual carefully before you start installing and using it and keep the manual for future reference This us
19. wrong arrangement of stones too much or too tight and use of salty water for instance sea water The warranty does not cover damages caused by improper use of the sauna heater CE Narvi Oy 12 EN 15821 2010 Multi firing sauna stoves fired by natural wood logs for space heating in residential buildings Narvi Velvet Fire safety initiation risk to adjacent elements including declared safety Back 200 mm distances to combustible Side 150 mm materials Ceiling 1220 mm Emission of combustible products Pass NARVI Oy pid tt oikeudet tuotteisiin tuleviin muutoksiin Surface temperature Pass Release of dangerous substances NPD Cleanability Pass Flue gas temperature 462 C Mechanical resistance Pass Thermal output and Energy efficiency as carbon monoxide emission at 13 96 O Pass 0 14 total efficiency Pass 67 flue draught 12 Pa thermal output 163 kW i e nominal space heating output refuelling loads 4 5 3x2 5 12kg Durability Pass GB 12 NI a ly i NARVI Oy Yritt j ntie 14 FI 27230 Lappi tel 358 0207 416 740 fax 358 0207 416 743 www narvi fi en
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