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2 Installation Manual: MEMC Silvantis 60 cell PV Modules 5 of 15 <br />4.0 MECH'ANJCAL INSTALLATION <br />4.1 PLANNINGANDDESIGN <br />Before installation, check to ensure all sub-structure Will accommodate expected system loads. This includes and is not <br />limited to roof, foundations, mechanical structure, and mechanical connections. <br />For roof installations, utilize a fire-resistant roofcovering rated forthe application. <br />Mechanical structures should not contact the module backsheet onder any expected load conditions <br />Consider the following factors during system design, which will influence performance: <br />a) MEMC solar modules produce the most power when they are pointed directly at the sun, and should be tilted for <br />optimum; system performance. <br />b) Proximity to obstructions such as: walls, buildings, trees,groundcover, snow cover, or dust and debris that have the <br />potential to shadeordamage the modules. <br />c) Elevated temperatures will decreaseenergy yield, so designsshould ensure adequate'aifflow acrossthe backof the <br />module. <br />d) Allow a minimum spacing of 10 mm between modules forthermal expansion. <br />4.2,MODULE INSTALLATION OPTIONS FOR MOUNTING LOCATIONS <br />For mounting locations forclampsor bolt for specified load, please referto Table on page 6. <br />Each modulershould be mounted using four bolts through the mounting holes on the rearsideof themodule, or with four <br />clamps over thefront side. <br />Depending on the desired load capability of the array, modules may be mounted either perpendicular or parallel to the <br />structure rails. Clamps can be mounted anywhere inside of the safe mounting range for each case illustrated below (referring <br />to chart showing clamp and bolt mounting locations). <br />If using bolts, eight mounting holes areiprovided on the rear side the module frame as shown ih Appendix 8.1. Use a stainless <br />steel bolt stack no smallerthan 1/4"-20 orM6, with two flat washers and a locking washeras shown in Appendix 8.2. <br />To ensure an adequate clamping area, all clamps used should comply with the following general conditions: <br />1. Clamp height must correspond to;50 mm frame height <br />2. Clailipli,ubtliaveallipili,1,01:ivvidll-10[381-1-10-1 <br />3. Clamp depth must be between 6 mm to 10 mm <br />All fasteners used to fixthe modules with clamps should be stainless steel, and no smal ler than W'-20 of M6. <br />To provide adequate fixing orclamping force, torquethe minimum recommended fasteners to 13.6 - 16.3 N.m [10 - 12 ft lb]. <br />All other structural dimensions. such as clamp and rail thickness, should be sized appropriately for the intended site load. <br />© Copyright 2012 MEMC Electronic Material <br />C« 41 <br />i