La Nordica Inserto 70 Ventilato H49 [23/78] Calculation of the thermal power

La Nordica Inserto 70 Ventilato Tondo [23/78] Calculation of the thermal power
11.3. CLEANING THE FLUE
The correct lighting phase, the use of proper quantities and types of fuels, the correct position of the secondary air regulator, enough
draught of the chimney-ue and the presence of combustion air are the essential elements for the optimal functioning of the appliance.
The device should be completely cleaned at least once a year or every time it is a needed (in case of bad working and low yield). An
excessive deposit of soot can cause problems in the discharge of smokes and re in the ue.
The cleaning must be carried out exclusively with cold equipment. This operation should be carried out by a chimney sweeper who
can simultaneously perform an audit of the ue (checking of possible deposits).
11.4. SUMMER STOP
After cleaning the hearth, chimney and hood, totally eliminating the ash and other eventual residues, close all the doors of the hearth
and the relevant registers; in case you disconnect the appliance from the chimney you must close its openings in order to let work others
possible appliances connected to the same ue.
We suggest performing the cleaning operation of the ue at least once per year; verifying in the meantime the actual status of the rope
seals, which cannot ensure the good operation of the equipment if they are not in good condition and are not making a good seal! In this
case the seals must be replaced.
In presence of dampness in the room where the stove has been placed, we advise you to put absorbent salts into the hearth.
If you want to keep for long the aesthetic look of the cooker it is important to protect its internal walls in row cast iron with neutral Vaseline.
12. 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
3
(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
3
.
Let’s suppose one wishes to heat a room of 150 m
3
(10 x 6 x 2.5 m) in an insulated apartment. In this case, it is necessary to have 150 m
3
x 35 W/m
3
= 5250 W or 5,25 kW. As main heating, a 8 kW device is therefore sufcient.
Approximate combustion value Required quantity in relation to 1 kg of
dry wood
Fuel Unit kcal/h kW
Dry wood (15% humidity) 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
3
7800 9.1 0,46
Naphtha L 8500 9.9 0,42
Electricity kW/h 860 1.0 4,19
INSERTI IN GHISA 60 - 70 - 70H49
6090710 23

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