Installation manual157.3 Concentric system7.3.1 GeneralThe appliance is connected to a flue gas discharge / combustion air supply system delivered by DRU, hereafter referred to as the concentric system. DRU has different concentric systems in its range.In the case of a concentric system, the inner tube is used as flue gas discharge. The combustion air is supplied by the outer tube. As a result, the latter always has a relatively low temperature. For the maximum temperature of the outer tube, see the technical data in table 4-1. The concentric system has been tested in combination with the appliance. Other concentric systems are not permitted.See the table below for the different concentric systems of DRU and their application:SystemDRU LAS AG-I 150/100DRU LAS ES-I 150/100DRU LAS ES-I 200/130DRU LAS ES-E 200/150/100DRU PV-I 100/60Permitted for this appliance.YesYesYesYesYesRemarksAlu-galva tubes for use inside the building*.Diameter Ø150/100 mm.Cannot be combined with the SS systems.SS tubes for use inside the building*.Diameter Ø150/100 mm.Using an SS adapter, it is possible to construct further with theinsulated LAS ES-E 200/150/100 system.SS tubes for use inside the building*.Diameter Ø 200/130.Using an SS adapter, if permitted, it is possible to construct further with LAS-ES-I 150/100.Insulated SS tubes.Discharge diameter Ø150/100.External diameter Ø 200 mm.Intended for use inside or outside building for placement in, for example, timber frame construction, execute with 0 mm distance along combustible material etc. It is not possible to continue building with an SS adapter with LAS ES-I 150/100.Optional discharge system with fan for discharge up to approx. 60 metres long.* With the exception of the components intended for that purpose, such as roof and wall terminals.The diameter of the concentric system appliance connection can be found in table 4-1. By means of natural draft, the flue gases are discharged to the outside, this can be achieved by means of a wall terminal (C11) or a roof terminal (C31). If necessary, an existing chimney can be used (C91, see section 7.3.5).In addition, if combined with PowerVent® (C12, C32), it is possible in many cases to discharge the flue gases with a smaller diameter (DRU PV-I 100/60).1Only use the concentric system supplied by DRU This system has been tested in combination with the appliance. DRU cannot guarantee a proper and safe operation of other systems and does not accept any responsibility or liability for this.1Use a chimney kit for making a connection to the chimney; this can be supplied by DRU.1For terminals, observe the information in table 7-2.Table 7-1: Concentric systems and their application
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