Helvi AUTOFEED 450 Manuel D'instruction page 12

Caution, welding in small spaces requires surveillance from a safe distance. In addition, the welding of certain materials containing lead, cadmium,
zinc, mercury or beryllium may be very harmful. Also remove any grease on the metal pieces before welding. Gas cylinders must be stored in an open
or ventilated area. The cylinders must be in a vertical position and fastened to a support or trolley.
Do not weld in areas where grease or paint are stored.
FIRE AND EXPLOSION HAZARDS
Protect the entire welding area. Compressed gas containers and other flammable materials must be moved to a minimum safe
distance of 11 meters.
A fire extinguisher must be readily available near the welding operations.
Be careful of spatter and sparks, even through cracks. It can be the source of a fire or an explosion.
Keep people, flammable objects and pressurised ontainers at a safe distance.
Welding of sealed containers or closed pipes should be avoided, and when opened, the operator must remove any inflammable or explosive materials
(oil, petrol, gas...).
Grinding operations should not be directed towards the device itself, the power supply or any flammable materials.
GAS BOTTLE
Gas leaking from the bottles can lead to suffocation if present in high concentrations around the work area.
Transport must be done safely: bottles closed and welding machine switched off. Always keep cylinders in an upright position
securely fastened to a fixed support to reduce the risk of falling.
Close the bottle between two operations. Be wary of temperature changes or exposure to sunlight.
The bottle must not be in contact with a flame, an electric arc, a torch, an earth clamp or all other sources of heat.
Always keep gas bottles at a safe distance from electrical circuits and thus never weld a pressurised bottle.
Be careful when opening the valve on the gas bottle, it is necessary to remove the tip of the valve and make sure the gas meets your welding
requirements.
ELECTRICAL SAFETY
The machine must be connected to an earthed electrical supply. Use the fuse size recommended on the signage table.
An electrical discharge can directly or indirectly cause serious and potentially deadly incidents.
Do not touch any live part of the machine (inside or outside) when it is plugged in (Torches, earth cable, cables, electrodes) because they are
connected to the welding circuit.
Before opening the device, it is imperative to disconnect it from the mains and wait 2 minutes, so that all the capacitors are discharged.
Do not touch the torch or electrode holder and earth clamp at the same time.
Damaged cables and torches must be changed by a qualified professional.
Make sure that the cable cross section is adequate with the usage (extensions and welding cables).
Always wear dry clothes in good condition, in order to be insulated from the electrical circuit. Wear insulating shoes, regardless of the environment
in which you work in.
Risk of electrocution !
If the weld is performed using different processes while the torch and the electrode holder are connected to material, a no-load
voltage or welding voltage is applied to the circuits !
At the beginning of a job and during interruptions, always isolate the torch and the electrode holder !
Isolation of the welder at the arc in relation to the welding voltage !
Not all the different parts involved in the welding current can be protected against direct human contact. The welder must
therefore avoid the risks by following the relevant safety regulations. Even a contact at low current may take the operator by
surprise and cause an incident.
• Make sure protective wear used is dry and in good condition (rubber sole shoes / leather welding gloves without staples or
rivets) !
• Avoid contact with with exposed electrical wire and non-insulated plugs!
• Always leave the welding torch or the electrode holder on an insulated surface !
Risk of burn as the welding current goes from the machine into the cables !
If the connectors are not safely locked in place, the connectors and the cables can become hot and cause burns !
• Check the welding connectors daily and lock them in place if needed by turning them to the right.
Stray welding currents can damage earth connections, damage electrical equipment or cause components to overheat and cause
fire.
AUTOFEED 450
12
EN