ACV Solo 18 Installation, Operating And Servicing Instructions

Also see for Solo 18: Guide

ACV Solo 18 Installation, Operating And Servicing Instructions Manual pdf 13 page image

EN • 13 664Y4200 • FENFRRU PL DE IT ES NLgeneralItYFilling water contains elements susceptible to damage boilers heat exchangersin case their concentration goes out of an adequate range.The risk is growing with the size of the installation since the water content perinstalled kW increases.prIncIple of preVentIonOxYgENDepending of the volume of the installation, a certain amount of oxygen isintroduced in the installation. During the exploitation of the installation, someoxygen can be brought in the system in case of water re-filling and/or presenceof hydraulic components without oxygen barrier (PE tubes & connectors).The oxygen reacts with the steel creating corrosion and generating sludges.While the ACV Prestige heat exchanger is made of stainless steel and is byconsequent not sensible to corrosion, the sludges generated in carbon steelpart of the installation (radiators, …) will lay down in the hot parts includingthe heat exchanger.The sludges in the heat exchanger have the effect to reduce the water flow rateand to thermically insulate the active parts of the heat exchanger, what couldlead to damages.HOw TO PREVENT AgAINST OxYgEN ?- mechanical system : an air remover combined to a sludges remover installedfollowing the constructors specifications limits efficiently the risk of oxygenin the installation;- chemical system : additives allow the oxygen to stay in solution in the water.ACV recommends the additives from Fernox (www.fernox.com) and fromSentinel (www.sentinel-solutions.net).note that these products must be used in strictly accordance with the watertreatment manufacturer’s instructions.HARDNESSDepending of the volume of the installation, the hardness of water and thepossible re-filling, a certain amount of lime is introduced in the installation.The lime will lay down in the hot parts, including the heat exchanger creating areduction of the water flow rate and a thermal insulation of the active parts ofthe heat exchanger. That phenomena can damage the heat exchanger.Acceptable hardness range:mmolca(hco3)2 / l °dh °fh0,5 - 1 2,5 - 5,6 5 - 10HOw TO PREVENT ?the filling and re-filling water must be softened if necessary to match theworking range. Additives can be used to keep the calc in solution in the water,ACV recommends the additives from Fernox (www.fernox.com) and fromSentinel (www.sentinel-solutions.net).note that these products must be used in strictly accordance with the watertreatment manufacturer’s instructions.The water hardness must be check regularly and recorded in a file.OTHER PARAmETERSIn addition to the oxygen and the hardness, some other parameters must becontrolled in the water of heating installations.Acidity 6,6 < pH < 8,5Conductivity < 400 μS/cm (a 25°C)Chloride < 125 mg/lIron < 0,5 mg/lCu < 0,1 mg/lThose parameters has to be measured and water needs chemical treatmentin case of values out of range. ACV recommends the additives from Fernox(www.fernox.com) and from Sentinel (www.sentinel-solutions.net).Note that these products must be used in strictly accordance with the watertreatment manufacturer’s instructions.InstallatIon cleanIngBefore filling an installation, it must be cleaned following the standardEN14868.Chemical cleaners can be used, ACV recommends the additives from Fernox(www.fernox.com) and from Sentinel (www.sentinel-solutions.net).Note that these products must be used in strictly accordance with the watertreatment manufacturer’s instructions.In case at least one of those recommendations cannot be warranted, the boiler must be hydraulicallyseparated of installation using plate heat exchangerheatIng Water recommendatIons