Bedienungsanleitung La Nordica Termoisotta DSA (Seite 34 von 101) (Deutsch, Englisch, Französisch, Italienisch, Spanisch)

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MAJOLICAS IF PRESENT

La NORDICA S.p.A.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 dierent coecient 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 uid.

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.

MAINTENANCE ON THE WATER SYSTEM

Excessive incrustation deposits on the inner walls of the hearth considerably reduce the eciency of heat exchange; therefore,

remove these deposits using a steel brush whenever necessary. Never use corrosive substances that can damage the thermo-

replace and the boiler.

With the system switched o, once a year carry out the following checks:

• Check the operation and eciency of the blowdown and safety valves. If they are defective, contact your authorised installer. IT IS

STRICTLY FORBIDDEN TO REMOVE OR TAMPER WITH THE SAFETY DEVICES.

• Check the thermal insulation of the lling pipe and the safety pipe.

• Make sure that the system is lled and under pressure, checking the water level in the expansion tank; also check that it is working

properly and check the eciency of the safety pipe.

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 caloric value necessary for a properly insulated room is 30 kcal/h per m

(for an

external temperature of 0°C).

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

(10 x 6 x 2.5 m) in an insulated apartment. In this case, it is necessary to have 150 m

x 35

W/m

= 5250 W or 5,25 kW. As main heating, a 8 kW device is therefore sucient.

Approximate combustion value Required quantity in relation to

1 kg of dry wood

Fuel Unit kcal/h kW



kg 3600 4.2 1,00

Wet wood (50% humidity) kg 1850 2.2 1,95

Wood briquettes kg 4000 5.0 0,84

Brown coal briquettes kg 4800 5.6 0,75

Normal anthracite kg 7700 8.9 0,47

Coke kg 6780 7.9 0,53

Natural gas m

7800 9.1 0,46

Naphtha L 8500 9.9 0,42

Electricity kW/h 860 1.0 4,19

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