USER MANUAL - 5- YF-74L A2
3. When operated on trunks, boilers, cabins etc.,the CO2 and argon gas will stay in the bottom. Please
replace gas sufficiently and use gas respire facilities in case of oxygen shortage.
4. Please accept the supervisor’s check when operate in narrow space, and ensure enough gas supply
and use breathe preventive facilities.
5. Do not weld in degrease, washing and spray space.
6. Use breathe preventive facilities as it will cause poisonous dust and gas when weld shielded steel.
Danger! Please follow the below notes to avoid accidents like fire and explode:
＊Spark and hot workpiece can cause fire.
＊It may cause fire if the cable is not connected well or when the current circuit of
the steel or other workpiece are not connected completely.
＊Do not weld on the case of tinder stuff, or it may cause explode.
＊Do not weld airtight containers such as slot, pipe etc., or may break.
1. Do not put tinder stuff in welding area.
2. Do not weld around tinder gas.
3. Do not put heat workpiece near the tinder stuff.
4. When weld the dooryard, ground and wall, do move away the tinder stuff around.
5. The cable joint place should be insulated.
6. The cable joint of the workpiece should be close enough to the welding place.
7. Do not weld those facilities with gas pipe or airtight slot.
8.Put fire extinguisher around the welding area in case of fire.
Notes! Please wear protective appliance to avoid arc, spark, residue and noise.
＊Arc ray can cause eye inflammation or skin burnt.
＊Spark and residue will burn your eyes and skin.
1. When welding or supervise welding, please use preventive facilities with enough shielding.
2. Please wear preventive glasses.
3. Please wear preventive facilities such as leather gloves, coat, foot-safeguard and apron.
4. Set preventive shield screen around the welding area to protect other people from harmful arc rays.
