Saunatec Helo 38SL User Manual download pdf (Page 9)

Wood is the only material that should be burned in the heater. Never use materials with

high heat capacity, such as particle board, plastic, charcoal or briquettes. Air is circulated

by opening the ash drawer. Excess draught will cause the heater to glow, which will

signiﬁcantly shorten its service life. Air circulation should, however, be kept at a reasonable

level in order to heat up the sauna rocks to an adequate temperature. Occasionally heating

up the heater with stronger draught will burn off soot accumulation in the ﬂue ducts and

improve the heater’s heating properties.

The heating up the sauna room depends on the room dimensions, heater output and the

materials used in the walls. Uninsulated walls (brick, tile, concrete, glass) increase the need

for additional heater output: 2 m

of additional air capacity must be calculated for every

square metre of wall space. If the sauna walls are made of solid timbers, the cubic air

capacity must be multiplied by 1.5.

The heater ﬁre grate must be cleaned and ash drawer emptied before each heating.

Avoid heating up when the ﬂue duct in the stone tray has been glowing hot for a long time,

as this will overload the heater ﬁrebox and shorten the useful service life of the heater.

After taking a sauna bath a small ﬁre can be left burning to help dry out the sauna room

structures.

Clean tap water must be used for sauna steam water. Check the quality of the water. Water

with a high saline, iron or humus content may cause premature corrosion of the heater.

Iron-rich water may also leave rust-like spots on the surface of the heater when it dries.

Clean the “rust spots” with a stainless steel cleaner. Never use sea water on the sauna

heater. The warranty does not cover damages caused by sea water or iron-rich water.

Wood-burning heaters (excluding the Ukkotonttu heater) can be ﬁtted with a 22 litre, ﬂue

duct-mounted water tank.

Heating up

Water quality

Flue duct-mounted water tank

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Saunatec Helo 38SL User Manual Page 9