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GB Modules Installation and User Manual Page 10
4. Clamp installation
Type
Mechanical load (Pa)
Safety factor
Schematic diagram
Purlin perpendicular to
long-side frame
+3600
- 1600
1.5
Purlin parallel to
long-side frame
+1600
- 1600
1.5
Notes:
• To maximize mounting longevity, Yingli Solar strongly recommends the use of corrosion proof (stainless steel) attachment hardware.
• To check whether the surface of the beam is flat and smooth, or add rubber pads on the beam to prevent the module from being crushed when it is pressed down.
• L represents the length of the long side of the module, the described distances are from the module edge to the middle of the clamp.
• The long-side frames of the module are fixed to the mounting beam or rail by at least 4 clamps that can be fitted with M8 bolts.
• The length of the clamp
≥
40 mm, and the module frame to maintain at least 7 mm but not more than 10 mm overlap part, could not contact with the front glass, shall not make the
frame deformation, and should avoid the shading effect of the clamp.
• Tighten M8 bolts to a torque of 14~20 N∙m. The tightening steps as follows: use torque wrench to tighten nut to target torque, nut loosen 90~180 degrees, finally tighten the nut to the
target torque and reduce the torque attenuation.
