Bedienungsanleitung Jotul I 520 (Seite 4 von 100) (Deutsch, Englisch, Holländisch)

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4.2 Wall

Distance to combustible wall protected by

insulation (fig. 1)

The Jøtul I 520 can be installed inside an open structure/surround,

provided that the distance from the wall (both combustible and

non-combustible) is at least 700 mm on the sides with glass,

and at least 362 mm on the sides without glass. These distances

must be observed because of the heat 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

of free air space at the top and at least

500 cm

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 fireproof board (specific 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

firewall (Fig. 1)

Requirements for regulation firewalls

The firewall 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-inflammable wall

“Non-inflammable wall” here means a non-bearing wall of

continuous brickwork/concrete.

Requirements for fireplace surround

Fireplace surrounds must be made of a non-inflammable material

Note that the entire back wall and, if any, side walls within the

surround must be covered with insulation/firewalls.

If the cowl is built up to the ceiling and the ceiling is of

inflammable 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 Fig.

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.

4.3 Air supply

Air must flow 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 specified in the text are minimum

requirements.

Required air vent sizes (for air circulation):

Base: Minimum of 500 cm

free opening.

Top: Minimum of 750 cm

free opening.

Note: See fig. 1 e and f

4.4 Ceiling

The fireplace can be fitted with the top edge of the hot air

opening of the surround at least 400 mm below a ceiling of

inflammable 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.

4.5 Chimney

The chimney is the engine that drives the fireplace and it’s

essential to have a good chimney in order for the fireplace to

function properly.

The draught in the chimney creates a vacuum in the stove. This

vacuum draws the smoke out of the stove and takes in air through

the combustion air baffle to fuel the burning process.

The combustion air is also used for the airwash system that keeps

the window clear of soot.

The draught in the chimney is caused by the difference in

temperatures inside and outside the chimney. The greater the

temperature difference, the better the draught in the chimney.

It is therefore important to allow the chimney to reach operating

temperature before adjusting the air vents to restrict combustion

in the stove (a brickwork chimney takes longer to reach operating

temperature than a steel chimney).

It is particularly important to reach operating temperature as

quickly as possible on days on which the draught in the chimney

is poor due to unfavourable wind and weather conditions. Make

sure the fuel ignites as quickly as possible. Practical tip: Chop

the wood into much smaller pieces and use an extra firelighter.

NB: If the stove has not been used for some considerable time, it

is important to check the chimney pipe for blockage.

ENGLISH

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