Yingli Solar PV Modules, Installation and User Manual
page 5
Landscape Orientation
Portrait Orientation
snow load), depending on the module type (please refer to the data sheet for
this information).
Mounting structures and other mechanical parts must be designed and approved
to withstand the design wind and snow loads applicable for a particular site.
Yingli Solar PV modules must not be subjected to forces from the substructure,
including forces caused by thermal expansion.
The mounting method must not result in the direct contact of dissimilar
metals with the aluminum frame of the PV module that will result in galvanic
corrosion. An addendum to UL Standard 1703 “Flat Plate Photovoltaic Modules
and Panels” recommends metal combinations not exceed an electrochemical
potential difference of 0.5 Volts.
Yingli Solar PV modules can be mounted in landscape or portrait orientation, as
illustrated in Figure 10, provided that the mounting method follows one of the
acceptable methods listed below.
Figure 10: Landscape and portrait mounting
In order to maintain the fire class rating, the distance between the PV module
front surface (glass) and the roof surface shall be at least 10 cm. This spacing
also allows air flow to cool the PV module. Install PV modules with a minimum
spacing of 1 cm between neighboring frames to allow for thermal expansion.
Mounting Methods
The following mounting methods are available:
Bolts or Clamps
Refer to figure 12 and 13. Do not modify the existing mounting holes or drill
new holes. Do not apply excessive pressure on the frame such that the frame
deforms.
•
Bolts:
Modules must be mounted using the mounting holes located on the rear
side of the long frame parts using M8 stainless steel bolts, nuts, and washers.
The torque of screw tightening should between 14N∙m to 20N∙m.
Figure 11: Detail of a bolt mounting attachment
Figure 12 : Mounting rails must run perpendicularly to the long frame
(120 or 144 cell modules)
The 120-cell module is mounted with four inner holes and the 144-cell module is mounted
with four outer holes, with max mechanical loads of 5400 Pa snow (front) and 2400 Pa
wind (back).
•
Top-down Clamps:
Third-party clamps that have been designed for PV
mounting structures are an approved mounting attachment method for
Yingli Solar PV modules. Modules must be fastened using clamps applied
to the top side of the long frame parts. A clamp holds two modules except
for the clamps at the beginning and end of a module row. The centerline of
the clamps must be in line with the mounting hole positions plus or minus
a distance of 50mm. The module clamps should not contact with the front
glass and deform the frame. and avoiding shadowing effects from the module
clamps. The module frame is not to be modified under any circumstances.
The applied torque value should be big enough to fix the modules
steadily,The torque of screw tightening should between 16N∙m to 24N∙m.
Figure 13-1: Detail of a top-down clamp mounting attachment
Figure 13-2: Clamps mounting positions
Screw
Backing Nut
Nut Washer
PV Laminate
Mounting Rail
Aluminum Frame
L
L
Inner Four-hole Installation
Long Frame Side Clamp Installation -1
（Clamp Length≥40mm）
L
L
L
Outer Four-hole Installation
Long Frame Side Clamp Installation -2
（Clamp Length≥40mm）
Short Frame Side Clamp Installation -2
（Clamp Length≥40mm）
L
L
Inner Four-hole Installation
Long Frame Side Clamp Installation -1
（Clamp Length≥40mm）
L
L
L
Outer Four-hole Installation
Long Frame Side Clamp Installation -2
（Clamp Length≥40mm）
Short Frame Side Clamp Installation -2
（Clamp Length≥40mm）
L
L
Inner Four-hole Installation
Long Frame Side Clamp Installation -1
（Clamp Length≥40mm）
L
L
L
Outer Four-hole Installation
Long Frame Side Clamp Installation -2
（Clamp Length≥40mm）
Short Frame Side Clamp Installation -2
（Clamp Length≥40mm）
120 cell module
Type
position L/mm
Max mechanical load
Long frame type-1
350
～
470
front 5400Pa
back 2400Pa
Long frame type-2
350
～
470
front 2400Pa
back 2400Pa
0
～
250
front 1600Pa
back 1600Pa
short frame type-1
0
～
250
front 1600Pa
back 1600Pa
144 cell module
Type
position L/mm
Max mechanical load
Long frame type-1
350
～
550
front 5400Pa
back 2400Pa
Long frame type-2
350
～
550
front 2400Pa
back 2400Pa
0
～
250
front 1000Pa
back 1000Pa
short frame type-1
0
～
250
front 1000Pa
back 1000Pa
