19
through the hole in the aluminum frame.
Add the spring washer and nut on the other side of
the bolt and tighten to secure all parts. The
tightening torque should be 4~4.5 N•m.
！
note
Approve the use of UL-467 certified bonding and
grounding devices, including Burndy (formerly
Wiley Electronics) Washer Electrical Equipment
Bonding (WEEB) and similar devices, such as
barbed washers, that meet the requirements of
UL-467 as suitable for electrical bonding and
grounding PV modules to PV mounting systems.
Other grounding methods may be allowable when
tested with the racking system per UL 2703
requirements.
Please don’t drill any additional grounding hole on
the frame of the modules.
The frame rails have pre-drilled holes marked with
a grounding sign. These holes should be used for
grounding purposes and should not be used for
mounting the modules.
7
Maintenance
It is required to perform regular inspection and
maintenance of the modules, especially within
warranty scope. It is the user’s responsibility to the
report to the supplier regarding the damages found in
time.
7.1
Routine inspection
Regular inspections should be made to see if the
photovoltaic modules in the photovoltaic array are
damaged, such as glass breakage, cable breakage,
junction box damage, cell damage, backplane breakage
and other factors that lead to functional and safety
failures of photovoltaic modules. When the above
problems occur, the supplier must be notified in time
to replace the same type of photovoltaic modules.
It is recommended to perform a preventive
inspection every 6 months, and do not replace the
components of the photovoltaic module without
authorization. If electrical or mechanical performance
inspection or maintenance is required, it is
recommended that qualified professionals perform the
operation to avoid electric shock or personal injury.
Routine maintenance measures should be taken
to keep the photovoltaic modules free of snow, bird
droppings, seeds, pollen, leaves, branches, dust, stains,
etc.
7.2
Photovoltaic module cleaning
If the PV module has a sufficient tilt angle (at
least 15°), it is usually not necessary to clean the PV
module (rain will have a self-cleaning effect). If there
is a lot of dirt on the surface of the photovoltaic
module, which has seriously affected the power
generation, use water without detergent and a soft
sponge or brush to rinse the photovoltaic module array
when it is cool throughout the day. Do not scratch or
wipe the dust when it is dry, otherwise it will cause
