SMA SC 250U Installation

Change from negative to positive grounding

SUNNY CENTRAL 250U

Installation Guide

SC250U_GFDI-IUS101711 | 98-4021211 | Version 1.1

SMA America, LLC Legal Restrictions

or by any means, electronic, mechanical, photographic, magnetic or otherwise, without the prior written permission of SMA America,LLC.

SMA America,LLC makes no representations, express or implied, with respect to this documentation or any of the equipment and/or software it may describe, including (with no limitation) any implied warranties of utility, merchantability, or fitness for any particular purpose. All such warranties are expressly disclaimed. Neither SMA America,LLC nor its distributors or dealers shall be liable for any indirect, incidental, or consequential damages under any circumstances.

(The exclusion of implied warranties may not apply in all cases under some statutes, and thus the above exclusion may not apply.)

Specifications are subject to change without notice. Every attempt has been made to make this document complete, accurate and up-to-date. Readers are cautioned, however, that SMAAmerica,LLC reserves the right to make changes without notice and shall not be responsible for any damages, including indirect, incidental or consequential damages, caused by reliance on the material presented, including, but not limited to, omissions, typographical errors, arithmetical errors or listing errors in the content material.

All trademarks are recognized even if these are not marked separately. Missing designations do not mean that a product or brand is not a registered trademark.

The Bluetooth

word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and

any use of such marks by SMA America,LLC is under license.

SMA America, LLC

3801 N. Havana Street

Denver, CO 80239 U.S.A.

Installation Guide SC250U_GFDI-IUS101711 3

Important Safety Instructions SMA America, LLC

IMPORTANT SAFETY INSTRUCTIONS

SAVE THESE INSTRUCTIONS

This manual contains important instructions for Sunny Central 250U P V inverter, that must be f ollowed during installation and maintenance of the PV inverter.

The Sunny Central 250U is designed and tested according to international safety requirements, but as with all electrical and electronic equipment, certain precautions must be observed when installing and/or operating the Sunny Central 250U. To reduce the risk of personal injury and to ensure the safe installation and operation of the Sunny Central 250U, you must carefully read and follow all instructions, cautions and warnings in this installation guide.

Warnings in this document

A warning describes a hazard to equipment or personnel. It calls attention to a procedure or practice, which, if not correctly performed or adhered to, could result in damage to or destruction of part or all of the SMA equipment and/or other equipment connected to the SMA equipment or personal injury.

DANGER

DANGER indicates a hazardous situation which, if not avoided, will result in death or serious injury.

WARNING

WARNING indicates a hazardous situation which, if not avoided, could result in death or serious injury.

CAUTION

CAUTION indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.

NOTICE

NOTICE is used to address practices not related to personal injury.

4 SC250U_GFDI-IUS101711 Installation Guide

SMA America, LLC Important Safety Instructions

Other symbols in this document

In addition to the safety and hazard symbols described on the previous pages, the following symbol is also used in this installation guide:

Information This symbol accompanies notes that call attention to supplementary information that you

must know and use to ensure optimal operation of the system.

Markings on this product

The following symbols are used as product markings with the following meanings.

Warning regarding dangerous voltage The product works with high voltages. All work on the product must only be performed

as described in it‘s documentation.

Electric arc hazards The product has large electrical potential differences between its conductors. Arc flashes

can occur through air when high-voltage current flows. Do not work on the product during operation.

Beware of hot surface The product can become hot during operation. Do not touch the product during

operation.

Observe the operating instructions Read the documentation of the product before performing any work. Follow all safety

precautions and instructions as described in the documentation.

UL1741 is the standard applied by Underwriters Laboratories to the Sunny Central 250U to certify that it meets the requirements of the National Electrical Code 929-2000. IEEE 929-2000 provides recommendations regarding the proper equipment and functionality necessary to ensure compatible operation when power generation is connected to the power distribution grid.

and IEEE-

Installation Guide SC250U_GFDI-IUS101711 5

General Warnings SMA America, LLC

General warnings

All electrical installations must be done in accordance with the local codes and National Electrical Code

ANSI/NFPA 70.

The Sunny Central 250U contains no user-serviceable parts except for the fans on the bottom of the enclosure and the filters behind the fans as well as the handle covers on the sides of the unit. For all repair and maintenance, always return the unit to an authorized SMA Service Center.

Be for e in sta lli ng o r using the Sun ny C ent ral 250 U, read all of the instructions, cautions, and warnings on the Sunny Central 250U in this installation guide.

Before co nnect ing the Sunny Cent ral 250U to the power d istribution grid, contact the local power distribution grid company. This connection must be made only by qualified personnel.

Wiring of the Sunny Central 250U must be made by qualified personnel only.

6 SC250U_GFDI-IUS101711 Installation Guide

+ 14 hidden pages