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All the basic requirements of the main aluminum
frame Dymond installation manual should also apply to
alternative mounting methods, unless otherwise specified.
The loads described in this manual correspond to test
loads. For installations complying with IEC 61215-2:2016
and UL 1703, a safety factor of 1.5 should be applied for
calculating the equivalent maximum authorized design
loads. Project design loads depend on construction,
applicable standards, location and local climate.
Determination of the design loads is the responsibility
of the racking suppliers or professional engineers. For
detailed information, please follow local structural code or
contact your professional structural engineer.
ClampIng methoDs
· The mounting method has been qualified by Canadian
Solar Inc. as well as certified by VDE and CSA.
· Each module must be securely fastened at a minimum
of four points on two opposite sides. The clamps should
be positioned symmetrically. The clamps should be
positioned according to the authorized position ranges
defined in table A. Install and tighten the module clamps
to the mounting rails using the torque stated by the
mounting hardware manufacturer. M8 X 1.25 (5/16”)
bolt and nut are used for this clamping method. The
yield strength of bolt and nut should not be less than
450 MPa.
· Tightening torques should be within 17~23 Nm
(12.5~17.0 ft-lbs) for M8 (5/16”-18 Grade B7) coarse
thread bolts, depending on the bolt class. For
the bolt grade, the technical guideline from the
fastener suppliers should be followed. Different
recommendations from specific clamping hardware
suppliers should prevail.
· The system designer and installer are responsible for
load calculations and for proper design of support
structure.
· Canadian Solar Inc.’s warranty may be void in cases
where improper clamps or unsuitable installation
methods are found. When installing inter-modules or
end-type clamps, the clamps must:
Not bend the module frame
Not touch or cast shadows on the front glass
Not damage the surface of the frame (to the
exception of the clamps with bonding pins)
Ensure to overlap the module frame by at least 5 mm
(0.2 in)
Ensure to overlap in length by at least 80 mm (3.15
in). when uplift load ≤ 4000 Pa, 40 mm (1.57 in) when
uplift load ≤ 2400 Pa.
Ensure to have a thickness of at least 3 mm (0.12 in)
· Clamp material should be anodized aluminum alloy or
stainless steel.
· Clamp positions are of crucial importance for the
reliability of the installation. The clamp centerlines must
only be positioned within the ranges indicated in table A,
depending on the configuration and load.
annex a: alteRnatIve mountIng methoDs
6
Min. 5 mm
overlap
Min. 3 mm thickness
Min. overlap length
40 mm
