Nordica CLEO COMBI Bordeaux Instructions For Installation, Use And Maintenance Manual

Contents

CLEO COMBI.8192000 Rev.08 – EN 235. FLUEFundamental requisites for correct functioning of the appliance:• the internal section must be preferably circular;• it must be heat insulated and impermeable and built withmaterials suitable to resist heat, combustion products andany condensate.• It must be without bottlenecking and have a vertical trendwith branches not exceeding 45°.• if already used, it must be clean;• respect the technical data in the instructions manual;Whenever the flues have a square or rectangular section theinternal edges must be rounded with a radius that is no lessthan 20 mm. For the rectangular section, the maximum ratiobetween the sides must be ≤ 1.5.A section that is too small causes the draught to decrease. Aminimum height of 4 m is recommended.They are prohibited and therefore jeopardise the goodfunctioning of the appliance: asbestos cement, galvanisedsteel, rough and porous internal surfaces. In Picture 3 findsome solution examples.The minimum section must be 4 cm2 (e.g. 20x20cm) forappliances whose pipe diameter is less than 200mm, or6.25cm2 (e.g. 25x25cm) for appliances with diameterexceeding 200mm.The draught created by your flue must be sufficient but notexcessive.A section of the flue that is tool large can have a volume that is too big to heat and therefore cause functioningdifficulties of the appliance; to prevent this; duct the same along its entire length. A section that is too small causesthe draught to decrease.The flue must be suitably distanced from inflammable or combustible materials by appropriate insulation orair gap.It is prohibited to allow system pipes or air intake ducts to transit inside the same. It is also prohibited to make mobileor fixed apertures on the same for the connection of further different devices.6. CONNECTION TO THE FLUEThe appliances with automatic door closure (type 1) must function, for safety reasons, with the hearth door closed(except for the fuel feeding phase or removal of ash).The appliances with doors that do not close automatically (type 2) must be connected to its own flue. Functioning isNOT allowed with the door open.The connection pipe to the flue must be as short as possible, straight, sealed and in compliance with Standards inforce. Assembly of the PROTECTION see Chapt. 20.The connection must be made with stable, strong pipes (we recommend a thickness of 2 mm) and be fixedhermetically to the flue. The internal diameter of the connection pipe must correspond to the external diameter of thestove combustion gas discharge stub pipe ( DIN 1298 ).ATTENTION: whenever the connection passes through particulars made up from inflammable materials within theradius of 20 cm around the pipe, all inflammable materials must be replaced by fire-proof materials thatare also resistant to heat.For good functioning of the appliance, it is essential that the place of installation has sufficient air for combustion (seeparagraph 10).The depression at the chimney must be 12 Pa (= 1.2 mm of water column).The measurement must always be taken with the machine hot (nominal calorific yield). When the depression exceeds20 Pa (2.0 mm water column) the same must be reduced with the installation of an additional draught regulator(butterfly valve) on the exhaust pipe or in the chimney.For safety reasons, the hearth door can only be opened when feeding the fuel (wood). The hearth must remain closedduring functioning and standstill periods.Picture 3(1) AISI 316 steel flue with double chamberinsulated with material resistant to 400°C.Efficiency 100% excellent.(2) Flue in refractory material with doublechamber, insulated and covered externally inlightened concrete. Efficiency 100%excellent.(3) Traditional flue in clay with square section andgaps. Efficiency 80% excellent.(4) Avoid flues with rectangular section, insidewhich the ratio is different to the diagram.Efficiency 40% poor.A+1/2AMax.A+1/2A(3)(1) (2)(4)