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Keep rail slots fi-ee of roofing grit or other debris. Foreign matter Will <br />cause bolts to bind as they slide in the slots. <br />'UNIRACSelarMountUnirac Code-Compliant Ihstallation Manual 1: <br />[3.2.4] Installing SolarMount rails <br />Inbtailing Splices: if your installation uses SolarMount splice bars, attach <br />the rails together (Fig. 13) be fore mounting the rails to the footings. Use <br />splice bars only with flush installations or those that use low-profile tilt <br />legs. <br />Although stfuctural, the joint is not as strong as the rail itself. A rail should <br />always be supported by more than one footing on both sides of the <br />splice. (Refereiice installation manual 908, Splices/Expansion,Joints.) <br />Figure 13. Splice bars slide into thefooting bolt <br />slots ofsolarMountrau sections. <br />Mounting Rails on Footings: Rajls may be attached to either oftwo <br />mounting holes in the L-feet (Fig. 14). Mountin the lower hole for a low <br />piofile, more aesthetically pleasing installation. Mount in the upperhole <br />for a higher profile, which will maximize' airflow under the modules. This <br />wil] cool them more and may enhance performance in hotter climates. <br />400*y <br />Slide the '/a-inch mounting bolts into the footing bolt slots. Loosely attach <br />-_the,railito .the footings with theflange;nuts. _ <br />Ensure that the rails are oriented to the footings as shown in Figure 8,9, <br />11, or 12, whichever is appropriate. <br />Cramping <br />bolt slot <br />Foot:ing: <br />bolt slot <br />r Mounting <br />slots <br />Aligning t:he Rail End: Aljgn one pairof rail ends to the edge of the \,A <br />installation: area (Fig. 15 or Fig. 16).10The opposite pair of rail ends willoverhang the side of the installation ;Di <br />area. De not trim them off until the installation is complete. <br />If the. rails are perpendicular to the rafters (Fig. 15), either end of the rails Figure 14. Foot-to-rail.sptice attachment <br />can be aligned, but the first module must be installed at the aligned end: <br />Ifthe rails are parallel to the rafters (Fig. 16), the aligned end of the rails ' <br />must face the lower edge of the roof. Securely tighten all hardware after <br />alignment is complete (20 ft lbs). <br />Muunt niudules Lu the ruils-us-saon-arpussible=Large-temperature <br />changes may bow the rails within afew hours ifmoduleplacement is <br />delayed. <br />Frlge nf Installdtidil nren -m| <br />- Edge of ir,stallation:area <br />Figure 15. Rdils perpendicular to the rafters.Figure 16. Rails parallel to the fafters. <br />V <br />?ate <br />19 <br />1