Kastor KARHU Wood-burning sauna stoves - Инструкция (Страница 33)

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the user’s manual.
3. Using the stove
3.1. Fuel
Use only untreated wood in Kastor stoves, preferably sturdy split logs of various woods, such as
birch or alder. The logs should at most be 35 cm long. Wet or foul wood does not heat very well.
It is not permitted to burn treated wood, wood with nails, plywood, plastic, plastic coated
cardboard or paper in this stove. Fluid fuels must not be used even while starting the fire 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 stove has been designed to work best when the chimney’s air suction is about 10–20 Pa. If
the chimney is tall, this optimal air suction limit is easily exceeded. This excess can be noticed as
follows:
•
The air flow cannot be adjusted with the ash door, only the amount of air available for
burning.
•
The flames reach into the connecting pipe and even up to the chimney.
•
The humming noise of the burn feels loud.
•
Looking through the glass door, the flames rage with great strength towards the stove’s
upper part.
•
The sauna and/or stones do not heat up properly in less than an hour (although the stove
has the correct size).
When you light the fire, the chimney valve and ash compartment door must always be open.
Once the fire has taken hold and burns well, adjust the air flow with the ash compartment door.
Usually, depending on the draught, the ash door is kept open by about 0.5–2 cm.
The stove’s basic draught is just right, when the burning can be affected by the ash door and the
flames rise calmly. This brings the cleanest burning, although it warms up somewhat more slowly
than in a stronger draught.
If the basic draught is too strong, it can be adjusted by setting a fireproof piece of brick or an
optionally available draught adjustment plate inside the stove’s upper part, on top of the arched
flame plate. If that does not help, the basic draught may be adjusted with the chimney valve. Do
not close the chimney valve too much – carbon monoxide poisoning hazard!
3.3. Adjusting the heat output
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.
3.3.1. A sauna bath on just one load of wood, lighting from below
•
Place two smallish logs lengthwise in the fire compartment.
•
Add some lighting aids between the logs and light them.
•
Then place a few logs crosswise on the previous ones.
•
Close the door and leave the ash compartment door open by about 3 cm.