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MICROBLOCCO 80
12.2. CLEANING OUT THE ASHES
All the devices are equipped with a hearth grating and an ash drawer for the collection of the ashes.
It is suggested to empty periodically the ash drawer and to avoid it fills completely in order not to overheat the grating. Moreover, it is
suggested to leave always 3-4 cm of ash in the hearth.
CAUTION: The ashes removed from the hearth have to be stored in a container made of fire-resistant material equipped with an
air-tight cover. The container has to be placed on a fire-resistant floor, far from flammable materials up to the switching off
and complete cooling.
12.3. 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-flue 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 needed (in case of bad working and low yield). An
excessive deposit of soot can cause problems in the discharge of smokes and fire in the flue.
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 flue (checking of possible deposits).
During the cleaning, it is necessary to remove the ash drawer, the grating, and the smoke deflectors from the device in order to ease the
fall of the soot. The deflectors can be easily extracted from their seats since they are not fastened using screws. Once the clearing has
been carried out, place them back in their seats
CAUTION: The lack of the deflectors causes a strong depression, with a too fast combustion, an excessive consumption of wood
with related overheating of the device.
12.4. MAINTENANCE OF THE EXTENSIBLE GUIDES
To work silently, as well as in a reliable and robust way, the doors are fastened to the extensible ball guides. By using the device continuously,
the lubricant of the guides tends to run out progressively in time making their sliding more difficult and noisy. For this reason, together
with each device a high temperature grease is supplied in order to make the lubrication of the guides possible for the user, in case it
becomes necessary (excessive noise or reduction of smoothness). After having completely lifted the door of the stack, using a syringe,
apply internally on the track on a visible point, as high as possible, two grease balls (corresponding to 0.5 ml of the graduated scale of the
syringe). Pay attention not to exceed the suggested quantity. Repeat the same operation on the other track and lift and lower the door many
times so that the grease distributes on all balls. CAUTION: use exclusively the grease supplied by La NORDICA.
13. 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
an external temperature of 0°C).
Given that 1 kW corresponds to 860 kcal/h, it is possible to adopt a value of 38 W/m
Let's suppose one wishes to heat a room of 150 m
x 38 W/m
= 5700 W or 5,7 kW. As main heating, a 8 kW device is therefore sufficient.
3
Fuel
Dry wood (15% humidity)
Wet wood (50% humidity)
Wood briquettes
Brown coal briquettes
Normal anthracite
Coke
Natural gas
Naphtha
Electricity
6290001 - IT-EN-DE-FR
(Picture 10 at page
46).
(10 x 6 x 2.5 m) in an insulated apartment. In this case, it is necessary to have 150 m
3
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
.
3
Required quantity in relation to 1 kg of dry
kW
4.2
2.2
5.0
5.6
8.9
7.9
9.1
9.9
1.0
(for
3
3
wood
1,00
1,95
0,84
0,75
0,47
0,53
0,46
0,42
4,19
25
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