Installation Instructions – RVR Solar Water Heating Kits - RVR.ie

Installation Instructions1.2.1 Hangar Bolt Location and mountingFigure 14 shows the mounting of a HP30 and HP20 bracket in relation to the roof rafters. The rafters typicallyare spaced on 400mm centres. In this case the horizontal spacing of the hangar bolts for the HP30 brackets isabout 1600mm apart (4 rafter spaces). The space for the HP30 is about 1200mm or three rafter spaces.The vertical distance between hangarbolts is 1250 - 1300 mm.The cross-members are slotted toallow horizontal adjustment. If it isintended to connect two or more collectorsin series the installed distancebetween each bracket should be approximately125mm.Once satisfactory locations havebeen measured and marked the drillingmay be completed.Fig. 14Fig. 15When all pilot holes have been drilled—drill 11mm clearance holes from the outside.Next lock two SS nuts together as shownand twist in the hanger bolt until 50mm ofthreaded bolt protrudes above the roofsurface.Apply some of the special purpose sealant(supplied) to the surface around thebolt. Fit the 5mm thick neoprene washerfollowed by the 40mm SS washer and SSnut. Tighten the nut by hand until youcannot turn it any more and then give itone full turn to form a watertight seal.Do not over tighten or you may breakthe slate or roof tile!Fig. 16We recommend the application of some more adhesive sealant aroundthe washer to give extra protection against the weather. Screw anotherSS nut on the protruding bolt and leave a small space between the firstand second nut.1.2.2 Mount the slotted tabsUse a further nut to fasten the slotted stainless steel tab onto thehanger bolt.Figure 17 illustrates how the bracket should be assembled with thelower cross-member fitted.Fig. 179