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SFSystem Planning and Assembly ,Installation Manual |15 S U N POW E R SF System Planning and Assembly Installation Manual Stainless sted hardware can seize up, a process called galling. To significant& reduce its likelihood, (1) apply anti-seize according to manufacturer's directions to bolts. Anti-seize lubricant is available at auto parts stores, (2) shade hardware prior to installation, and (3) avoid spinning on nuts athigh speed. Contact the lubricant manufacturerfor torque specuicatians when using lubricant. Part II. Installing SF System Safe, efficient SF System installation involves three principal tasks: A. Layingout theins[allation area and planning for material conservation. B. Installing footings and rails, beginning with the lowest row and moving up the roof. C. Placing modules and cap strips, beginning with the highest row and moving down [he roof. The following illustrated steps describe the procedure in detail. Before beginning, please note these important considerations. / [1.3.] Installer responsibilities: Please review this manual thoroughly before installing your SF System. SunPower also provides a limited warranty on SF System products (page 14). The installer is solely responsible for: • Complying with all applicable local or national building codes; • Ensuring that SunPower and other products are appropriate for the particular installation and the installation environment; • Ensuring that the roof, its rafters,connections, and other structural support members can sup- port the array under allload conditions (this total assembly is referred to as the roof rafter struc- ture); • Using only SunPower parts and installer-supplied parts as specified by SunPower (substitution of parts may void the warranty); • Ensuring that lag screws have adequate pullout strength and shear capacities as installed; • Verifying the strength of any alternate mounting used in lieu of the lag screws; • Maintaining the waterproof integrity of the roof, including selection of appropriate flashing; • Ensuring sa fe installation o f all electrical aspects ofthe PVarray. Footings must be lagged into structural members. . Never attach them to the decking alone, which leaves both the array and roofsusceptible to severe damage. For array widths or lengths greater than 32 feet, contact SunPower concerning thermal expansion issues. Sample layout, illustrated in Figure 4 Assumptions: 12 modules (60- x 36-), arranged in 3 rows of4 modules Amy width = 144- (36-module Widthx 4 modules perrow) Arraylength = 180- (60- modulelength x 3 rows) + 3 - (1 h end rail width x 2 rails) + lib- (44 berween.moduleran widthx 2 rails) = 18436 1. Laying out the installation area: Always install SF System rails perpendicular [o rafters. (These instructions assume typical rafters that run from the gutter to the peak of theroof. If this is not the case, contact SunPower.) Rails are typically mounted horizontally (parallel to the lower edge of the rooO, and must be mounted within 10 degrees of horizontal. Leave adequate room to move safely around the array during installation. During module installation, you will need to slide one module in each row about a foot beyond the end ofthe rails on one side. Using the numberof rows and the number of modules per row in your installation, determine the size of your array area fonowing Figure 2. IA- ot each end ol anay Roof peak %- space between module rows -4-1 - ArrIy -f--t- length Module Railslength Dee coplion) -1- -t - Module + width + 1% t Anay width r, (module width times modules per row) Figure 2. installation area layout. Note: Module length is not neces- mily measured.from the edges of theframe. Someframes have «ps. O,hers are assembled with pan-head screws. AU such features must be induded in module length. $ t