Read this manual before using concentrator and save for future reference. 1 TABLE OF CONTENTS 0. IEC SYMBOLS ………...………………………………………….…………………3 1. CAUTIONS …………………..……………………..…………….………………..3 2. WARNINGS …………………..……………………..…………….………………..4 3. PRECAUTIONS ………………….………………………………………………...5 4. INTENDED USE ……………………….…………………….………………….….5 5. DESCRIPTION ……………………….…………………...…………………….….6 6. SPECIFICATION ……………………….……………….…………………..….….7 7. HANDLING ………………………….…………………….……………………….9 7.1 Unpacking ……………………………………………