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Installing roof hooks and horizontal rails 55.8 Installing horizontal railsThe horizontal rails must be joined together usingconnectors. For standard installations each collector isequipped with one upper and one lower horizontal rail.5.8.1 Connecting the horizontal rails Push connector (Fig. 28, [1]) as far as it will go intoboth rails (Fig. 28, [2]). To lock, tighten both installed M10 threaded studs(Fig. 28, [3]) using a size 5 Allen wrench.1 2363043965.33-1.SD5.8.2 Installing the horizontal railsFig. 28 Connecting horizontal rails1 Connector2 Horizontal rail3 M10 threaded stud Push threaded clip (Fig. 29, [1]) onto the roof hook inthe direction of the arrow. Place the lower horizontal rails (Fig. 29, [2]) onto theroof hooks and loosely fasten M8 bolt (Fig. 29, [3]) sothat the rails can still be aligned. Carry out the same procedure for the upper rails.NOTICE31Use a tape measure and a level to verifythe rails are plumb and properly aligned.Improperly aligned rails not only reflectpoorly on the installer but also may putstress onto the collectors causingpremature failure.Fig. 29 Fastening profile rails to the roof hook1 Threaded clip2 Horizontal rail3 Screw263043965.34-1.SDLogasol SKN 3.0 - We reserve the right to make any changes due to technical modifications. 25