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SYSTEMA S.p.A.AIRTIGHT GAS-FIRED RADIANT TUBES INFRAFig. 25a Detail of fixing the brackets5 FITTING THE APPLIANCE5.1 Fitting on the ceilingThe appliances tend to oscillate due to expansion, so they must be provided with chains long enough to allow oscillation.“S” shaped hook with minimumdiameter 5 mm (afterassembly, it is advisable totighten the hooks by squeezingthem with pliers)Choose the type of fasteningon the basis of roof characteristicsand of the weighteach fastener has to support(for dimensioning see thetable at page 8).Fig. 26 Aggancio a soffitto dell’apparecchioChain DIN 5685 withdiameter 5.5 mm minimumwork load 100 kgweight 0.275 kg/mtRev. 18GB061028
SYSTEMA S.p.A.AIRTIGHT GAS-FIRED RADIANT TUBES INFRARemember also that, due to expansion, when starting, the tube may arch slightly upwards for a time; the weight is thensupported only by the chains at the head and at the end (bear this in mind for anchoring, as the weight is divided between4 anchoring points instead of 6-8-10 points, depending on whether the model is INFRA 6, INFRA 9 or INFRA 12).Fig. 27 Arching of the tube when starting.5.2 Fitting on the wallFig. 28 Wall installation with maxi bracket (maximum installation height 7 metres)29Rev. 18GB0610
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