Majolicas (If Present); Products Made Of Natural Stone (If Present); Varnished Products (If Present); Enamelled Products (If Present) - LA NORDICA ZEN Manuel Utilisateur

MAJOLICAS (If present)

La NORDICA has chosen majolica tiles, which are the result of high-quality artisan work. As they are completely carried out by hand,
the majolica may present crackles, speckles, and shadings. These characteristics certify their precious origin.
Enamel and majolica, due to their different coefficient of dilatation, produce microcrackles, which show their authentic feature.
For the cleaning of the majolica we suggest you to use a soft and dry cloth; if you use a detergent or liquid, the latter
might soak in and highlight the crackles permanently.

PRODUCTS MADE OF NATURAL STONE (If present)

Natural stone has to be cleaned with very thin abrasive paper or with an abrasive sponge. Do NOT use any cleanser or fluid.

VARNISHED PRODUCTS (If present)

After some years of product use a change in the varnished details colour is totally normal. This is due to the considerable temperature
range the product is subject to whenever in use and to the varnish ageing of time passing by.
ATTENTION: before any possible application of the new varnish, do clean and remove all the traces from the surface which
has to be varnished.

ENAMELLED PRODUCTS (If present)

For the cleaning of enamelled surfaces use soap water or not aggressive and not chemically abrasive detergents.
After the cleaning do NOT let soapy water or any cleanser dry but remove them immediately.
DO NOT use sandpaper or steel wool.

CHROMIUM-COMPONENTS (If present)

If the components become bluish due to overheating, this can be solved with a suitable product for cleaning. DO NOT use abrasives
or solvents.

CLEANING OF THE HEARTH GRATE

The use of not suitable fuel, as for example wood with sand, prevents the correct sliding of the cast-iron grate and can lead it to the
complete blockage. In this case you should arrange for a removal of the dirty sediments from the surfaces of the grate and its holder
Picture 8 .

CALCULATION OF THE THERMAL POWER

There is not an absolute rule for calculating the correct necessary power. This power is given according to the space to be heated,
but it depends also largely on the insulation. On an average, the calorific value necessary for a properly insulated room is 30 kcal/h
per m (for an external temperature of 0°C).
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Given that 1 kW corresponds to 860 kcal/h, it is possible to adopt a value of 35 W/m
Let's suppose one wishes to heat a room of 150 m
150 m x 35 W/m = 5250 W or 5,25 kW. As main heating, a 8 kW device is therefore sufficient.
3 3
Fuel
Dry wood (15% humidity)
Wet wood (50% humidity)
Wood briquettes
Brown coal briquettes
Normal anthracite
Coke
Natural gas
Naphtha
Electricity
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(10 x 6 x 2.5 m) in an insulated apartment. In this case, it is necessary to have
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Approximate combustion value
Unit kcal/h
kg 3600
kg 1850
kg 4000
kg 4800
kg 7700
kg 6780
m 7800
3
L 8500
kW/h 860
ENgLIsH
.
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Required quantity in relation to 1 kg of
dry wood
kW
4.2
2.2
5.0
5.6
8.9
7.9
9.1
9.9
1.0
1,00
1,95
0,84
0,75
0,47
0,53
0,46
0,42
4,19