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GB 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).
Installation 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 installation 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
installation method follows one of the acceptable methods listed below.
Figure 10: Landscape and portrait installation
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.
Installation Methods
The following installation methods are available:
Bolts or Clamps
Refer to figure 12 and 13. Do not modify the existing installation 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 installation 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 installation attachment
Figure 12 : Installation rails
The large size modules are 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
installation structures are an approved installation 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 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 16 N∙m to
24 N∙m.
Figure 13: Detail of a top-down clamp installation attachment
M A I N T E N A N C E
General
Yingli Solar recommends that PV systems be periodically inspected by the
installer, or other qualified person.
The purpose of the PV system inspection is to ensure that all system components
are functioning properly. At a minimum, this inspection should confirm the
following:
– All cables and connector attachments are undamaged and properly secured
– No sharp objects are in contact with the PV module surfaces
– PV modules are not shaded by unwanted obstacles and/or foreign material
– Installation and grounding components are tightly secured with no corrosion
Defects should be addressed immediately.
Cleaning
Over time, dirt and dust can accumulate on the glass surface of the module,
reducing its power output. Yingli Solar recommends periodic cleaning of PV
modules to ensure maximum power output, especially in regions with low
precipitation.
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）
Inner Four-hole installation
Outer Four-hole installation
