General Safety; Condition Of Use - Delta M42U Operation And Installation Manual

1.2 General Safety

IMPORTANT SAFETY INSTRUCTIONS: SAVE THESE INSTRUCTIONS !
- Please read these instructions carefully and save them for later use.
To prevent personal injury and/or property damage, and also to ensure long
term operation of the solar inverter, it is imperative this section be read carefully
and all the safety instructions understood before using this inverter.
This user manual provides important instructions for Delta grid-tie transformerless
solar inverter. The product is designed, tested, verified, and certified according
to international safety requirements, certifications, and standards but precautions
must be observed when installing and operating the product.
The inverter installation must be performed by an authorized electrician in
accordance with the the National Electrical Code® ANSI/NFPA 70 or the Canadian
Electrical Code® CSA C22.1 and/or other prevailing local codes, as well as
OSHA requirements. This product is suitable for both indoor and outdoor use.
- The design of this inverter is transformerless. There is no isolation transformer
between the AC and DC sides, i.e., the product does not require galvanic isolation.
In order to function properly, any PV array connected must have its PV circuits
isolated from ground, i.e., do not bond either side of the array to ground!
If a grounded PV array is connected to the inverter, the error message INSULATION
(E34) will appear on the display.
- It is prohibited to reference the L1, L2, or L3 terminal to ground; to do so will
damage the inverter and void the producr warranty.

1.2.1 Condition of Use

- The M42/36/28U is a transformerless solar inverter with dual independent
MPP tracking inputs, each of which converts the variable direct current
generated by the solar array into a utility frequency grid-compliant balanced
three-phase AC current and feeds it into the utility grid.
- The Photovoltaic modules used must be compatible with the inverter. PV
modules with a high parasitic capacitance to ground may only be utilized if the
capacitive coupling does not exceed 8μF. (For each MPPT channel)
- The inverter must only be operated in countries for which it is approved by
Delta and the grid operator.
ATTENTION: NO GALVANIC ISOLATION
11
Safety