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DEsCRIPTION
Definition: thermo-fireplace according to EN 13229.
La NORDICA thermo-fireplace are ideal for holiday flats and weekend houses or as auxiliary heating all year round. Wooden logs are used as
fuel. The appliance works as an intermittent operating appliance.
The appliance is composed of painted and galvanised sheet steel and cast iron.
The fireplace is found inside the boiler, is built in 4 mm thick steel and is reinforced using welded nails. The water in the heating system
circulates in the boiler, which absorbs the heat produced in the fireplace. A swivelling, removable grid is found inside the fireplace
pos. A). Ash drawer
(Picture 12
The sight door is assembled on extensible ball guides, which assure a robust and silent operation reliable in time. The door lifting counter-
weight is supported by two sturdy chains with related pinions.
The ceramic glass window (resistant up to 700°C) of the door provides a lovely view of the burning flames and prevents sparks and smoke
from getting out.
WF25 - WF25X - WF25 Plus
Room heating takes place:
a) by radiation: the heat is radiated into the environment through the panoramic window and the hot external surfaces of the thermo-
fireplace;
b) by conduction: radiators or heat convectors of the centralised system fed by hot water produced by the boiler.
The device is equipped with registers of primary and secondary air, with which it is possible to adjust the combustion air.
1A- PRIMARY air register
(Picture
With the air register located under the door of the hearth, it is possible to adjust the air flow through the ash drawer and the grating
in direction of the fuel. The primary air is necessary for the combustion process. In order to open the air flow, the bar must be
completely pulled out. The ash drawer has to be emptied regularly, so that ash cannot hinder the intake of primary air for the
combustion. Primary air is also necessary to keep fire live.
The primary air register must be almost completely closed during wood combustion, as otherwise the wood burns too quickly and
the thermo-product may overheat.
2A- sECONDARY air register
When the bar is pushed to the back the passage of the secondary is completely open.
The secondary air, passing through the two lateral jambs of the front side, heats itself starting the double combustion and keeping at the
same time the glass clean (with open register).
The adjustment of the registers necessary to reach the rated calorific yield is the following one:
Hourly consumption ( kg/h )
WF25
WF25 X
WF25 Plus
FLUE
Essential requirements for a correct operation of the device:
• the internal section must be preferably circular;
• be thermally insulated and water-proof and produced with materials suitable to resist to heat, combustion products and
possible condensates;
• not be throttled and show a vertical arrangement with deviations not greater than 45°;
• if already used, it must be clean;
• all the sections of the flue gas duct must be accessible to inspection;
• inspection openings must be provided for cleaning.
• observe the technical data of the instructions manual;
Should the flues have a square or rectangular section, internal edges must be rounded with a radius not lower than 20 mm. For the rectangular
section, the maximum ratio between the sides must be = 1.5.
A too small section causes a decrease of the draught. It is suggested a minimum height of 4 m.
The following features are FORBIDDEN and therefore they endanger the good operation of the device: asbestos cement, galvanized steel,
rough and porous internal surfaces. In
For a correct installation please respect the sections/lengths of the flue shown in the technical data table. By installations
with different dimensions the flue must be suitably sized in accordance with EN13384-1.
The draught created by the flue must be sufficient, but not excessive.
A too big flue section can feature a too big volume to be heated and consequently cause difficulties in the operation of the device; to avoid
this, tube the flue along its whole height. A too small section causes a decrease of the draught.
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pos. B).
ACCEssORIEs
8)
8)
(Picture
11
8
5,4
Picture 3
gives some examples of execution.
POKER
SERIES
PRIMARY air
Figura 8
C CLOSED
Figura 8
C CLOSED
Figura 8
C CLOSED
ENgLIsH
GLOVE
SERIES
sECONDARY air
Figura 8
C OPEN
PRE-ADJUSTED
Figura 8
C OPEN
PRE-ADJUSTED
Figura 8
C OPEN
PRE-ADJUSTED
(Picture 12
TERTIARY AIR
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