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to avoid dangerous flash fires. Do not burn full loads of very small wood such as shavings 
and splinters, as they produce excessive heat for short durations. 

 
The fuel logs must not be stored in the immediate vicinity of the stove. Remember the safety 

distances. Only bring into the sauna as much wood as you can fit immediately into the fire 
compartment. 

3.2. Adjusting the air flow 

The heater has been designed to function best when the negative pressure of the flue is 
approximately –17 Pa. If the chimney is long, this optimal negative pressure limit may be 
exceeded. Adjust the draft and combustion air flow using a damper so that it is suitable. Be 
careful of carbon monoxide. The damper must not be close too far! 
When lighting the fire, the door may be kept slightly open for a moment. The ash pan can be 
closed. It is not opened during burning. Combustion air comes from another source. 

3.3. Adjusting the heat output 

The batch's wood quantity determines the heating efficiency. Table (2) shows the correct 
amounts of wood which guarantee burning in accordance with the CE marking. 

The heat output is affected by the quality and amount of fuel. Do not burn excessively long 

logs in the stove. Take care not to heat the stove constantly to a red glow. 

3.4. Lighting 

  Place small logs into stove parallel to the grate. Amounts and total per table (2). 

  Add kindlings under the logs and light them. 

  You can keep the fire door open for a moment while logs start to burn. 

You may also light from the top, but ithen burning will be slower. 

3.5. Adding a batch 

Add the actual heating batch when fire has nearly burned down to embers. Wood quantity 

table (2) 

Fill the stove parallel to grate with logs. Close the fire door. 
Sauna is normally ready for bathing after 40 to 50 minutes, and it is not necessary to add 

more wood for one sauna bath. 

3.6. Continuing heating 

Due to the amount of bathing, cold conditions etc., another load of wood may have to be used for 

heating.  

When the first load has burned down to embers, add more wood into the stove parallel to the grate. 

Wood quantity to be added in table (2).

 

4. Maintenance 

4.1. Cleaning the stove 

The stove’s surface can be cleaned with a mild cleaning fluid detergent solution by wiping 

down with a soft, moist rag. 

The glass doors are cleaned with Kastor’s Noki Pois cleaning fluid, which is available in 

hardware stores. 

4.2. Ash removal 

Excessive ash shortens the grate’s lifespan and weakens the burning. Remove the ash while 

it is cold, always before the next heating, using a metal container to avoid a fire hazard.

 

Lift the front edge of the ash pan, so that it can be pulled out of the stove and emptied. 

 

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Summary of Contents for Karhu PK 007

Page 1: ...KASTOR KARHU PK PK series wood burning sauna stoves installation and usage manual Karhu PK 007 12 16 20 27 37 18 ES 20V 27V 27ES 37V and JK models 1...

Page 2: ...ly in KARHU models 2 5 2 KARHU JK heaters with an extended fire door 2 5 3 Installing through the wall and fitting the front frame JK models 16 20 27 37 2 5 4 Connecting from the top KARHU and KARHU J...

Page 3: ...le material procured from reliable suppliers we have gathered over the years The steel is Finnish structural steel from Ruukki which can be bent into various solutions while retaining its hardness due...

Page 4: ...nsported in an upright position All sticker labels and packaging material must be removed before the heater is used Type plate and the CE marking must not be removed The ash pan must be closed during...

Page 5: ...her flammable material on the heater is forbidden due to fire risk In order to guarantee full power and safety the fire door must always be kept shut when heating The fire door can be open when heatin...

Page 6: ...e no more fumes rising from the stove Once the stove has cooled down after the burn in move it into the sauna See to it that the sauna is well ventilated during the first couple of heating 2 1 2 SIDE...

Page 7: ...ot give a general rule of thumb you will find the right mix by trial and error For the stove s proper functioning it is essential that the hot air circulates between the stones to heat them quickly If...

Page 8: ...2 Reduction of safety distances Kastor protective walls and a stand are available picture 7 2 3 The chimney s isolated part must reach the protective wall Other protection is not needed If the sauna...

Page 9: ...oor extension The fire protection measures on the door side must also adhere to the instructions in chapter 2 3 By adding fireproofing the stove and its door extension may also be installed on wooden...

Page 10: ...a factory built Kastor chimney check 2 4 Make sure to choose the correct chimney type with regard to your stove model chimney height temperature class T 600 exterior circumstances etc For best results...

Page 11: ...chimney might suffer damage Do not throw water directly at the glass door The stove s operating life shortens if it is constantly heated to a red glow The stove s working life will be shortened signif...

Page 12: ...tove constantly to a red glow 3 4 Lighting Place small logs into stove parallel to the grate Amounts and total per table 2 Add kindlings under the logs and light them You can keep the fire door open f...

Page 13: ...a fails to work as you think they should go through the following check list First to make sure you have chosen the correct stove for your sauna s requirements look through the stove choosing instruct...

Page 14: ...connecting pipe which is red hot although the lower end of the stove within the mantle is not red See chapter 3 2 about draught adjustment and heat output Is the draught too weak See chapter 3 2 about...

Page 15: ...is a smell of sulphur in the sauna Traces of sulphur have remained on the stones from the quarry s explosion or the stones are naturally sulphurous 6 Manufacturer s declaration www helo fi DoP This pr...

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Page 18: ...ana Kuva 1 1 Mutteri 2 Vesis ili 3 Tiiviste 1 4 Vaippa 5 Tiiviste 2 6 Vipuhana Kran till vattenbeh llare Bild 1 1 Mutter 2 Vattenbeh llare 3 T tning 1 4 Mantel 5 T tning 2 6 Kran Water tank tap Pictur...

Page 19: ...Aseta kivet niin ett kivien v liin j riitt v sti ilmaa Placering av bastustenarna genomsk rningbild av ugnens stenmagasin Placera bastustenarna p plats s att det blir tillr ckligt med luft mellan ste...

Page 20: ...the Kastor protective stove base Kastor Kastor A Karhu 007 PK 105mm Karhu 12 PK 110mm Karhu 16 PK 120mm Karhu 20 PK 120mm Karhu 27 PK 125mm Karhu 37 PK 125mm Kuva bild picture p 2 3 Kastor kiukaan ase...

Page 21: ...tenen Anslutning av ugnen ovanifr n till Connecting the stove from the back to a brick chimney tegelskorstenen Connecting the stove from the top to a brick chimney Kuva bild picture p 2 6 Liitt minen...

Page 22: ...1 Savupeltilaite R kspj ll Chimney valve device 22...

Page 23: ...fr n ugnen A Det oisolerade f rbindelser ret uppifr n n r det kopplas till br nnbart material fr n f rbindelser rets yta till sidan 400mm upp t 400mm B Ugnens avst nd fr n br nnbart material till sid...

Page 24: ...A 400 400 B 500 C 50 D 500 E 50 F 400 Kuva bild picture p 6 Kuva bild picture p 7 24...

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