La Nordica Isotta Evo [19/88] Chimney pot
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La Nordica Isotta Evo [19/88] Chimney pot

La Nordica Giulietta X [19/88] Chimney pot
VIOLETTA X / GIULIETTA X / ISETTA EVO / ISOTTA EVO / VIOLA EVO / ISOTTA FORNO
1195300 19
A section which is too small causes a reduction in draught. A minimum height of 4 m is advisable.
The following materials are FORBIDDEN and compromise the good operation of the appliance: asbestos cement, galvanised steel, rough
and porous internal surfaces. Picture 1 at page 59 shows some example solutions.
The minimum section must be 4 dm
2
(for example 20x20 cm) for appliances whose pipe dimensions are less than 200 mm, or 6.25
dm
2
(for example 25x25 cm) for appliances with a diameter of more than 200 mm.
The draught created by your ue must be sufcient but not excessive.
A section of the ue which is too large can present a volume which is too large to heat and therefore cause operating difculties for the
appliance; to avoid this, it is necessary to intubate the appliance for its entire height. A section which is too small causes a reduction in
draught.
The ue must be at a suitably distance from ammable or combustible material using suitable insulation or an air space.
It is FORBIDDEN to pass system piping or air ducts inside the ue. It is also forbidden to create moveable or xed openings on the ue
itself, for the connection of further different appliances (See chapter CONNECTING A FIREPLACE OR OPEN HEARTH TO THE FLUE).
6.1. CHIMNEY POT
The ue draught depends on the suitability of the chimney pot.
It is therefore essential that, if built in a handcrafted way, the exit section is more than twice the internal section of the ue
(Picture 2 at page 59) .
As it must always go past the ridge of the roof, the chimney pot must ensure exhaust even in the presence of wind (Picture 3 at page 60).
The chimney pot must meet the following requirements:
• Have an internal section equivalent to that of the chimney.
• Have a useful exit section of double the internal section of the ue.
• Be built so as to prevent rain, snow or any foreign body entering the ue.
• Be easy to inspect, for any maintenance and cleaning operations.
6.2. CONNECTION TO THE CHIMNEY
Products with automatic door closing (type 1) must operate, for safety reasons, with the furnace door closed (except during the fuel loading
or ash removal phases).
Products with non-automatic door closing (type 2) must be connected to their own ue.
Operation with doors open is only allowed when supervised.
The connection pipe to the ue must be as short as possible, straight horizontal and positioned slightly in ascent, and watertight.
Connection must be carried out with stable and robust pipes,comply with all current Standards and Regulations and to those envisioned
by the law, and be hermetically secured to the ue. The internal diameter of the connection pipe must correspond to the external diameter
of the appliance ue gas exhaust stub pipe (DIN 1298).
ATTENTION: as far as concern the realisation of the ue connection and ammable materials please follow the requirements provided by
UNI 10683 standard. The ue must be properly spaced from any ammable materials or fuels through a proper insulation or an air cavity.
Minimum distance safety 25 cm.
IMPORTANT: the unused ue gas exhaust hole must be covered with its respective cap (See chapter: DIMENSIONS).
The chimney pressure (DRAUGHT) must be at least 11 Pa 12 Pa Pascal (=1,1 =1.2 mm of water column). The measurement must
always be carried out when the appliance is hot (nominal caloric power). When the pressure exceeds 17 Pascal, it is necessary to
reduce it through the installation of an additional draught regulator (false air valve) on the exhaust pipe or in the chimney, according to the
regulations in force.
For correct appliance operation, it is essential that sufcient air for combustion is introduced into the place of installation (see paragraph
AIR FLOW IN THE PLACE OF INSTALLATION DURING COMBUSTION).
6.3. CONNECTING A FIREPLACE OR OPEN HEARTH TO THE FLUE
The ue gas channel is the stretch of piping which connects the product to the ue. In the connection, these simple but extremely important
principles must be respected:
• under no circumstances use a ue gas channel with a diameter less than that of the exhaust clamp with which the product is equipped;
• each metre of the horizontal stretch of the ue gas channel causes a slight loss of head which must be compensated if necessary by
elevating the ue;
• the horizontal stretch must never exceed 2 metres (UNI 10683);
• each bend of the ue gas channel slightly reduces the ue draught which must be compensated if necessary by elevating it suitably;
• The UNI 10683 – ITALY regulation requires that under no circumstances must there be more than 2 bends or variations in direction
including the intake into the ue.
If the user wishes to use the ue as a replace or open hearth, it is necessary to seal the hood below the entrance point of the ue gas
channel pos. A Picture 5 at page 61.
If the ue is then too big (e.g. 30x40cm or 40x50cm), it is necessary to intubate it with a stainless steel tube with a diameter of at least
200mm, pos. B, taking care to close the remaining spaces between the pipe and the ue immediately under the chimney pot pos. C.

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