Helo Group Ltd Wood burning sauna heaters User manual

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Wood burning sauna heaters
Installation and user’s manual
314 PKLE 30 B

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Thank you for choosing quality products from Helo
We think that our products will live up to your expectations and give you many hours of enjoyment in your
sauna. We want you, your family and friends to have many comfortable sauna baths and at the same time
find new ways to enjoy the sauna bathing.
Helo is the world-leading producers of products for saunas and steam saunas. We develop, produce and
market products for saunas and steam saunas in the world. Saunatec has the largest factories of sauna
products in the world (Finland, Germany and the USA) and a well-developed network of retailers, both
nationally and internationally. Our product range consists of sauna and steam rooms, electric and wood
heaters, control panels and sauna accessories.
Helo Group Ltd
User Guide. Wood-burning sauna heaters
Copyright@2004. Helo Group Ltd. All rights reserved.

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Preparing the heater for use 4
Minimum safety distances 4
Wall protection and choices of material 6
Installation 7
Installation of heaters with front water tanks 8
Ventilation in a wood-burning Sauna 8
Sauna rocks 8
Heating up 9
Water quality 9
Mounted water tank 9
Changing the direction of door opening 10
Heater care and maintenance 10
Troubleshooting 11
Helo 20SL, Helo 28SL, Helo 38SL, Installation 12
Index

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Preparing the heater for use
Read the instructions carefully before the first use!
The heater is painted with heat-resistant paint and due to its chemical properties it may evaporate burning
odours from its surface when heated for the first times. Therefore we recommend the first heating up to be
done outdoors or in a well-ventilated sauna room. The first pre-heating must be done without stones. If the
sauna stove is heated up outdoors it should be done with a 2 metre connecting pipe installed in order to get
a good draught. In preheating the continuous heating with 3-5 loads of wood should be enough to remove
the anti-corrosion substances from the heater.
One of the paint properties is that it reaches its final state only during the first heating times. Thus rubbing
and wiping of the painted surfaces should be avoided before the first use. Handle the heater with care. The
heater is likely to release paint odour for some time as any other painted materials.
Adjustable feet
The heater can be equipped with optional adjustable feet (shown here).
Adjustable feet facilitate the installation of the heater on an inclined floor.
Installation point
Make sure there is enough space for installation and observe the safety distances. Heating up requires
1 m x 1 m around the heater. Place the heater far enough from combustible materials and protect the
floor if the floor is tiled. See that there is space in the niche for air circulation (minimum of 100 mm).
Remember that the sauna rocks decay over time causing fine-grained rock material to fall to the floor with
the steam water. The heat generated by the furnace and temperature changes may also cause small metal
flakes to fall to the floor which is a normal property of metal.
Due to the above-mentioned facts it is a good idea to avoid using light-coloured materials near the heater.
Always check the heat resistance of the tiles with the supplier.
Keep the floor under the heater clean.
Minimum safety distances
Minimum safety distances between the heater and combustible materials:
from the sides and back of the heater: 500 mm
from the front of the heater: 1000 mm
from the top of the heater to the ceiling: min.1200 mm
from the heater to the floor (see Floor protection): min. 500 mm.
Statutory minimum safety distances to combustible materials can be reduced by half with single-layer and
by 75% with double-layer light protection.
Image 1.

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Side walls
Wood-burning sauna heaters are classified as burning surface fireplaces.
The surface temperature of the heater will not rise above 350 °, and the
following minimum safety distances should be observed. Combustible
structural parts, such as wood walls, benches, etc.
1. Minimum safety distance from the vertical surfaces of the heater to
unprotected wood structures: 500 mm. (Image 1).
2. The minimum safety distance mentioned in item 1 can, however, be
reduced to no less than 250 mm when using ”single-layer” protection.
This type of light protection can be made of minimum of 7 mm thick
non-combustible, fibre-reinforced concrete sheets or minimum of
1 mm thick metal sheet tightly mounted to the wall.
A minimum of 30 mm air gap must be left between the wood surface
being protected and the protective sheet using, for example, duct
bushings as spacers. (Image 2).
3. The minimum safety distance shown in picture 1 can be further
reduced to minimum of 125 mm when using double-layer protection.
Double-layer protection can be made two sheets mentioned in item 2
leaving a minimum of 30 mm air gap between the wall and sheet.
(Image 3).
4. If the wall is made of masonry, a 50 mm air gap between the vertical
surfaces of the heater and the walls will be sufficient. (Image 4).
Image 2.
Image 3.
Image 4.
500
500
250
250
300
Mounting bolts
30mm air gap
1mm metal sheet or
7mm non-combustible,
fibrereinforced concrete
sheet
125
125
300
A
50
Mounting bolts
30mm air gap
1mm metal sheet or
7mm non-combustible,
fibrereinforced concrete
sheet
Measurements A is for wood surfaces depending
on the type of protection used.
- Without protection: 500 mm
- With single-layer protection: 250 mm
- With double-layer protection: 125 mm