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SYSTEMA S.p.A.4.2 Assembling the unitAIRTIGHT GAS-FIRED RADIANT TUBES INFRATo assemble the various components that make up theINFRA radiant module, please follow the instructionsgiven below.Begin assembling the tubes, starting with the curvedone:1) Fit the two tubes (delivery and return) into the curveby about 120 mm, hammering slightly if required,taking care to place a piece of wood between thehammer and sleeve (see fig. 18a). Then fix them inplace using the screws supplied with the curve.2a) If Infra 9B and 12B models are used, assemble thetwo sleeves Ø 108mm and Ø80mm, fixing themwith the supplied screws, taking care to push thetubes half way into the sleeve (app. 150 mm), hammeringslightly if required, taking care to place apiece of wood between the hammer and sleeve(see (fig. 18a).2b) If the Infra 6B model is used, assemble the burnerunion and aspirator union as shown in the diagram(fig. 4 page 12), the fixing holes of the aspirator andburner must be positioned vertically as shown in fig.21.3) Fit the other 2 tubes, taking care that the ends withsellotape are positioned at opposite ends to thesleeves (fig. 4 page 12).Fig.17Fig.18WoodFig.18aFig.19Rev. 18GB061024