Harvia CAULDRON Instructions For Installation And Use

The flue connections of cauldrons must be made with
great care. The connecting pipe must fit tightly against the
pipe lining. The diameter of the flue outlet should be ca.
10–15 mm bigger than that of the connecting pipe. The
space between the pipe and the flue outlet must be tightly
sealed, for example, with mineral wool.
The inner cauldron is made of high-quality stainless
steel. Note! Foreign substances in water or transfered in
the cauldron by e.g. a grinding machine, such as iron, may
cause rust spots. These can easily be removed using a fine
(400) water sandpaper or emery paper on the surface. Do
not use steel wool for cleaning.
When the inner cauldron is filled with cold water, some
of the water may condense on the cauldron's outer sur-
face, which may arouse suspicion of a possible leak in the
cauldron. This is, however, a natural phenomenon and will
disappear as the water warms up. The cauldrons insula-
tion is made of porous and moisture-resistant vermiculite
mass. When the mass dries, there may appear small cracks
to the surface. These do not affect to usability.
Rather than fill the cauldron to the brim, leave it a few
centimetres short of full to avoid overboiling. The cauldron
must never be heated when empty.
The inner cauldron can be removed for cleaning and chim-
ney sweeping. If the outer surface of the inner cauldron
is covered with a thick layer of soot, water will heat up
more slowly and the consumption of firewood will increase.
Use only good quality wood (no resinous wood) in the
furnace. Burning should take place slowly.
Cauldrons do not draw air as well as wood-burning
stoves due to the narrow and initially cold smoke duct
between inner cauldron and lining. Close the chimneys'
damper when the fire has finished burning to keep the
water warm longer.
The safety distance of inflammable materials is 150 mm
sideways and backwards, 500 mm to front and 1000 mm
up towards the ceiling. If the cauldron is placed on a
wooden base, a concrete slab at least 60 mm thick must be
cast between the base and the cauldron, or a correspond-
ing sheath must be put in place. The slab must extend
at least 100 mm sideways past the cauldron walls and
400 mm forward from the chamber door. The slab should
be supported slightly above the floor surface to keep the
floor material dry.
If a wood-burning stove is placed closer than 250 mm
from the cauldron, the stove and cauldron must be sepa-
rated by a non-flammable protective sheath that prevents
the stove's heat from damaging the surface of the caul-
dron. The purpose of the sheath is to protect the cauldron
from direct heat radiation from the stove. When equipped
with a sheath, the stove and cauldron can be located as
close ad 60 mm from each another.
Impurities and chemicals in the water may damage
the metal parts of the cauldron.
The water used in the cauldron should meet the require-
ments of clean household water. The following factors
have an essential influence on water quality:
humus concentration (colour, taste, precipitation);
•
recommended concentration is less than 12 mg/litre.
iron concentration (colour, odour, taste, precipita-
•
tion); recommended concentration is less than 0.2
mg/litre.
hardness; the most important substances are manga-
•
nese (Mn) and calcium (Ca); recommended content
of manganese is less than 0.05 mg/litre, and calcium
less than 100 mg/litre.
Do not allow water to freeze in the cauldron as
expanding ice may break the inner cauldron.
26012015/Y05-0102
HARVIA CAULDRON
Instructions for Installation and Use
Adjustable legs (3 pcs): Lift the cauldron by about 50 mm and
insert the adjustable leg's screw end in the hole in the plastic
part. Put the cauldron back on its surface and adjust the legs
to ensure that it is level.
The safety distance to
inflammable materials
(min. mm)
Protecting the floor (min. mm)
Cauldron and wood-burning stove side-by-side
min. 60 mm
CAULDRON 80 L
590 mm
Ø140 mm
85 kg
150
CONCRETE
BRICK
WOOD PANEL
CONCRETE
min.
500 mm
NON-FLAMMABLE
PROTECTIVE PLATE
min. 30 mm