5/20 - Installation instructions for the OPEN Classic out of pool automatic safety cover51.2 Building work1.2.1 Concrete beltFig. 3Plan a concrete belt using a 350 Kg cement per m3concrete mix with a size of w 25 cm x h 40 cm x l 100cm using at least 0.10 m 3 to stabilise the fixture ofthe roller.1.2.2 OverflowFig. 4Plan to control the water level at 12 cm belowthe edge using a ø 50 mm overflow which isindependent of the skimmers and automatic filling.1.2.3 SkimmerWhen possible, plan to place the skimmers on thepool widths and not on the lengths in order tofacilitate the movement of the cover.1.3 Squaring checksFig. 51.3.1 In order to correctly place your roller perpendicularto the pool lengths: measure the diagonals.1.3.2 Make a mark (1) on the pool liner at the level of theedge opposite the cable exit.1.3.3 Measure a precise length "A" of 1 m less than thelength of the pool and make a mark (2), at the endof A on the pool liner.1.3.4 On the opposite length make a mark (3) oppositemark (1).1.3.5 Carry over the "A" measurement from (3) in orderto place mark (4).1.3.6 Measure the distance "B1" between (1) and (4).1.3.7 Measure the distance "B2" between (2) and (3).1.3.8 If B1 and B2 are equal continue with the next step,otherwise correct the position of marks (3) and (4)and start the operation again until B1 = B2.Fig. 3 40cm100cm25cm100 cm25 cm40 cmFig. 4120mmØ50mm 120 mmØ 50 mmFig. 543 12AAB1 B2LlA AB2B1I