Air Supply; Installation - Jøtul I 620 Serie Manual De Uso

ENGLISH
that is transferred onto the ceiling and adjacent walls (Fig. 1 e
and f). With this type of installation, the convection holes in the
front and sides of the surround can be omitted since there are
convection slots in the top.
Note: Do not place a solid plate on the top of the stove. There
must be at least 750 cm 2 of free air space at the top and at
least 500 cm 2 of free opening at the base.
Insulation requirements
When installing the insert in a home-built surround with
combustible walls protected by insulating material, the
following types and thicknesses of insulation can be used:
• 50 mm Jøtul JGFW-5 fi reproof board (specifi c thermal
conductivity = λ value = 0.06 W/mK)
• 50 mm Rockwool Fire Protective Bats (λ value = 0.046 W/mK)
• 150 mm Siporex (λ value = 0.144 W/mK).
• Other materials may be used. The insulation properties
must then always be equal to or exceed the thermal
resistance* (R) requirements for the 50 mm Jøtul JGFW-5.
• Thermal resistance (R) is an indication of how well a
material insulates with respect to its thickness. Thermal
resistance (R) is calculated as the thickness (d) of the
material divided by the thermal conductivity of the material.
R = d/λ value.
The thermal resistance (R) for the Jøtul JGFW-5 is 0.83
m2*K/W.
Distance to combustible wall protected by
fi rewall (Fig. 1)
Requirements for regulation fi rewalls
The fi rewall must be at least 100 mm thick and made of
brick, concrete or lightweight concrete. Other materials and
structures with satisfactory documentation may also be used.
Contact your local building authorities regarding restrictions
and installation requirements.
Distance to non-infl ammable wall
"Non-infl ammable wall" here means a non-bearing wall of
continuous brickwork/concrete.
Requirements for fi replace surround
Fireplace surrounds must be made of a non-infl ammable
material.
Note that the entire back wall and, if any, side walls within the
surround must be covered with insulation/fi rewalls.
If the cowl is built up to the ceiling and the ceiling is of
infl ammable material, extra panelling must be installed above
the top of the heating chamber and above the cowl's vents in
order to prevent the ceiling becoming hot. Use for example:
Rock wool, 100 mm thick, on a steel plate (min. 0.9 mm). See
fi g. 1 e and f. Ensure there is adequate ventilation in the top of
the cowl – e.g. a gap under the ceiling.
NB: Remember that it must be possible to sweep and inspect
the installation.
40

3.4 Air supply

Air must fl ow between the insert and the brickwork, and it is
extremely important that there is an unimpeded air supply to
the air inlets.
The air inlet dimensions specifi ed in the text are minimum
requirements.
Required air vent sizes (for air circulation):
Base: Minimum of 500 cm
Top: Minimum of 750 cm
Note: See fi g. 1 e and f
3.5 Ceiling
The fi replace can be fi tted with the top edge of the hot air
opening of the surround at least 400 mm below a ceiling of
infl ammable material. See Fig. 1 e and f. Ensure there is
adequate ventilation in the top of the cowl – e.g. a gap under
the ceiling.

4.0 Installation

The Jøtul I 620 Series can be installed in a prefabricated
surround, brick surround and pre-existing open fi replace
(hearth).
If installing in a prefabricated surround, follow the instruction
manual for the surround. NB! The product cannot be placed
directly in a corner if the convection air outlet is towards
the ceiling (see fi g. 1f).
If building a brick surround, the leg rack (optional, item no.
51052512) must be used. See Fig. 1 e and f.
If placing inside a pre-existing, code-compliant masonry
fi replace, it must also satisfy the requirements for the insert
surround, regarding installation against combustible materials
and air vents. See Fig. 1 c, d, e, and f.
4.1 Installation of Jøtul I 620 Series
In order to install /assemble the product, see the Jøtul I 620
installation manual (art. no. 10051930).
Fresh air supply
The air used for combustion in any well-insulated house needs
to be replaced. This is particularly important in houses with
mechanical ventilation. Such replacement air can be procured
in several ways. The most important thing is to supply the air
to the room where the stove is placed. Place the outside wall
valve as close to the stove as possible and make sure that it
can be closed when the stove is not in use.
For the fresh air supply connection, follow the national and
local building regulations.
Important! Ensure that air vents in the room where the
fi replace is located are not blocked.
free opening.
2
free opening.
2