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5Installing roof hooks and horizontal rails5.8.3 Aligning the horizontal rails Align the upper and lower horizontal rails evenly sideto side and to each other using a level and a cord(Fig. 30).NOTICEUse a tape measure or a cord to comparethe diagonal distances across, whichmust be identical for the installation to besquare (Fig. 30, [1]). Correct it beforeproceeding if this is not the case.190°90°1 Tighten all screws.NOTICEEnsure the horizontal rails do not sag.Use a cord to confirm. Install spacers tocorrect for differences in height.Uneven or sagging profile rails may putstress on collectors and connections andmay result in leaks and reduced servicelife.Fig. 3063043965.35-1.SDAligning the horizontal rails (high load rails notshown)5.8.4 Installation of collector hangersTo carry the weight of the collectors two collectorhangers are used which are snapped into the lowerhorizontal rail. Install the collector hanger (Fig. 31, [3]) at theinnermost slotted holes (Fig. 31, [1]) on the lowerhorizontal rails until it snaps into place (Fig. 31, [2]).312Fig. 31 Attaching collector hanger1 Slots reserved for the hanger2 Both teeth must engage with the rail3 Collector hanger26Logasol SKN 3.0 - We reserve the right to make any changes due to technical modifications.