1 INSTALLATION This machine must be used for welding only. It must not be used to defrost pipes. It is also essential to pay special attention to the chapter on SAFETY PRECAUTIONS. The symbols next to certain paragraphs indicate points requiring extra attention, practical advice or simple information. This manual must be stored carefully in a place familiar to everyone involved in using the machine. It must be consulted whenever doubts arise and be kept for the entire life-span of the machine; i