HUUM CORE6 Montage- Und Bedienungsanleitung Seite 7

Laying of the heater stones
Quantity of stones:
• HUUM CORE electric heater needs 30 kg of heater stones
• The stones with a diameter of 3-5 cm are suitable for HUUM CORE
electric heater.
• We recommend the use of round stones which complement the design of the
heater and allow the steam water in the heater to move freely to the lower
layers of stones.
• Natural stones (e.g. olivine diabase, olivine), which are sold specifically for use in
sauna heaters, are suitable as heater stones.
• We recommend avoiding decorative stones as they do not accumulate enough
heat and break easily. Broken pieces of stone inside the heater can block air
holes and damage heating elements.
NB! The defects due to the use of unsuitable stones are not covered by
warranty.
• Before laying, we recommend washing the stones clean of dust under running
water.
Requirements for laying stones
• Use gloves to protect your hands when laying stones.
• Lay the stones one by one and don't pour or throw them into the heater.
• Start with bigger stones, placing them to the bottom and to the sides. Use
smaller stones to fix the larger stones in place and to fill in the narrower gaps.
• Try to lay the stones as tightly as possible, but leave some room for air to
circulate in the heater.
• Lay the stones between the heating elements as well. This will help support the
heating elements and prevent them from coming into contact. Take care not to
push the stones too hard or bend the heating elements.
• Stack the outer walls of the stone container as tightly as possible to prevent
excessive heat from radiating onto the heater body.
• On top of the heater the stones should completely cover the heating elements,
make sure these will not be visible between the stones. Ladling water directly on
the heaters shortens their life and produces unpleasantly pungent steam.
NB! If the heating elements are not properly surrounded by stones, the
safety distances given in Table 1 do not apply, as additional heat radiation
to flammable surfaces will occur. Make sure that the heating elements are
not visible from between the stones!
• Check the condition of the stones once a year to remove broken pieces and
replace them, if necessary.
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