Brochure - Unical Lattner Condensing Hot Water Boilers

... point by pointAluminium heartApplying the same technology used inthe motorcar industry, the ALKON’s 50motor is a cast aluminium/silicon andmagnesium heat exchanger/condenser.Its major features are the lightweightand compact design: weighing only10 kg and measuring 12 cm in depth,47 cm high and 43 cm wide. The verysevere final tests (according tothe Standard EN 303-1, with a pressureof 26 bar) brilliantly passed, testifythe high quality of this casting.The technology (Unical patent),already experimented on the rangeof high and average output MODULEXboilers, has permitted the constructionof a compact heat exchanger which,as well as favouring an elevated heattransfer, also consents self-cleaningof the flue side.Thus, the following benefitsare guaranteed:• Long lasting performance, thanksto the absence of lime scale.• Extremely easy servicingMoreover, thanks to the 100% wetsurfaces in the heat exchanger,a maximum lifespan and reliabilityis ensured, thanks to the optimumcirculation which neveroverburdens it.Blue flameThe combustion system is sited ina special sealed box, placed abovethe heat exchanger, composedby a modulating fan, gas valve, gas/airmixer, ignition device, flame controland a special ‘metal fibre” burner whichproduces the so-called “blue flame”pre-mixed combustion, with a CO 2emission equal to 9% at minimumand maximum output.Silent performanceThanks to the pre-mixed modulatingfan’s low operating pressure, capableof developing a soft flame, the ALKONboiler ensures quiet operation.Low NOx microflameThe microflames which develop internallyundergo a very quick cooling downprocess with a subsequent reductionof the volumetric thermal load.Class 5 Low NOxIn the ALKON boiler, the particular blueflame pre-mixed combustion,with an equivalent flame temperature,transmits greater energy than thatobtained with traditional combustion.Thanks to the practically total oxidizationof the molecules of natural gas, the verylow polluting emissions producedpromote the ALKON boiler intothe selective Class 5 Low NOx category(EN 483). Moreover, the absenceof turbulences ensures absolutesafe operation.Optimum long flue lengthsThe pre-mixed combustion, thanks tothe available manometric head,guarantees flue outlet systems upto 30metres long with a diameter of 80 mm.Efficiency (%)110109108106104102100989694High resistance and long lifeThe physical unalterability of theburner’s metal fibre construction limitsthe mechanical and thermal stresses,ensuring long life. Servicing is facilitatedthanks to the reduced use ofcomponents and ease of access.Exceptional modulation ratioThe prerogative for obtaining a highseasonal efficiency is to be ableto dispose of a “flexible” boiler.To be able to modulate down toan output of only 8,8 kW means thatthe boiler is able to adjust itself to therequired output to meetthe system’s minimum loads, withoutmaking the burner fire/turn offexcessively, dispersing energy uselessly.This same flexibility guarantees areserve of energy, which is alwaysready to satisfy extreme requirements,such as a great demand of immediateheat output.CasingThe casing is in steel plates, paintedwith epoxy-polyester powders andinternally insulated with reflectingpolyethylene materials 5 mm thick.EFFICIENCY DEPENDING ON THE HEATING LOAD20 25 30 35 40 45 50 55 60 65 70Return temperature (C°)30% part load100% full load