Mounting Methods For Framed Bifacial Double Glass Module (Bolting); Mounting Methods For Framed Bifacial Double Glass Module (Clamping) - Canadian Solar CS3U-MB-FG Installation Manual

6.3
mountInG metHods foR fRamed BIfacIal
douBle Glass module (BoltInG)
· The mounting method has been qualified by Canadian
Solar Inc., as well as certified by VDE and CSA.
· Modules should be bolted to support structures through
the mounting holes in the rear frame flanges only.
· Each module must be securely fastened at a minimum of
4 points on two opposite sides.
M8 X 1.25 (5/16") bolt and nut should be used.
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") coarse thread bolts, depending on
bolt class.
· In areas with heavy wind loads, additional mounting points
should be used. The system designer and the installer are
responsible for calculating the load and ensuring that the
support structure meets the requirements.
Bolt Washer
Spring
Washer Nut Washer
· Modules should be bolted at the following hole locations
depending on the configuration and load:
cs3u-mB-aG, cs3K-mB-aG, cs3u-PB-aG, cs3K-PB-aG
Frame
Rail
Bolting on long frame side using four innermost
mounting holes
Mounting rails run parallel to the long frame side
Maximum Load:
Uplift load ≤ 2400 Pa
Downforce load ≤ 5400 Pa
6.4
mountInG metHods foR fRamed BIfacIal
douBle Glass module (clamPInG)
· 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 below. 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 450MPa.
· 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.
· The mounting rails shall be designed to limit as much as
possible shade on module rear side cells
· 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:
1. Not bend the module frame
2. Not touch or cast shadows on the front glass
3. Not damage the surface of the frame (to the exception
of the clamps with bonding pins)
4. Ensure to overlap the module frame by at least 5 mm
| 17