20Caution! Risk of injury from gas cylinder toppling over.-Always use a safety strap-Fix the safety strap at the same height as the top part of the c-Never fix the safety strap around the neck of the cylinder-Fix the gas cylinder to the trolley-Connect up the gas cylinder:-Take off the protective cap from the gas cylinder-Briefly turn the gas-cylinder valve anticlockwise, to blow off any dust and dir-Inspect the seal on the pressure regulator-Screw the pressure regulator onto the gas cylinder and tighten itConnecting upthe gas cylinderWe recommend using a cooling unit for the following applications and situations:-Robot welding-Hosepacks over 5 m long-TIG-AC welding-In general, where welding is performed in higher power rangesThe cooling unit is powered from the power source. As soon as the mains switch of thepower source is shifted into the “ON” position, the cooling unit is ready for operation.Remarks on thecooling unitGeneral remarksPutting the machine into serviceThis section describes how to put the power source into service-for the principal application (TIG welding)-with reference to a standard configuration for a TIG welding installatioThe standard configuration consists of the following components:-power source-cooling unit-TIG manual welding torch-pressure regulator-gas cylinder-gas-cylinder holder-trolleyThe steps set out below will give you an overview of how to put the power source intoservice.For detailed information on each of these steps, please refer to the instruction manualsfor the appliances in question.Warning! An electric shock can be fatal. If the machine is plugged into the mainselectricity supply during installation, there is a high risk of very serious injury anddamage. Only carry out any work on the machine if-the mains switch is in the "OFF" position, and-the machine is unplugged from the mains.