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3-7 Mounting the AC module
Before mounting AC module in the PV rack, be aware of the following requirements:
•
Check that all parts of the product are intact and operational.
•
Check that the cable connectors are not damaged.
•
Do not install the AC modules horizontally. It will make it difficult for dust to be washed off by rain
naturally. Accumulation of dust, dirt or soil may be a cause of performance degradation.
•
When installed on a roof, the PV module must be mounted over a fire-resistant roof. The fire resistance of
the PV module is class C according to ANSI/UL790.
•
For proper operation, do not remove AC module frame or replace with another frame.
•
Do not make extra holes on the AC module frame. Additional holes on the frame may weaken the
strength of the frame and cause damage finally.
•
To avoid the tensile strain from the thermal expansion, it is recommended to leave a space more than
6mm (0.236 inches) between AC modules frames.
•
Mount LG AC module to PV rack with 4~5N•m torque.
•
For reliable connection, make sure that the AC module frame and a PV rack are surely fastened enough to
prevent the AC modules from getting loose.
•
When installing modules in areas of heavy snow, special care should be taken to install the modules in a
manner that provides sufficient strength for meeting local code requirements.
AC Modules
AC Junction Box
Guides for mounting AC modules on the PV racks are explained from next page.
• When an AC module is exposed to light, it supplies a dc voltage to a micro inverter.
Therefore, the LED on the micro inverter will illuminate in red with a condition that it is not
connected to the grid.
• To prevent the danger of the electric shock, do not touch metal parts inside the AC cable connectors.
Rev. 1.0
AC Module System Installation Manual
16
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