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1. Safety Precautions
1.1 ELECTRIC SHOCK
Precautionary measures must be taken to provide maximum protection against electrical shock.
1. Do not touch live electrical parts.
2. Turn OFF welding power source before servicing unless the procedure specifically
requires an energized unit.
3. Do not leave live unit unattended.
4. When testing a live unit, use the one-hand method. Do not put both hands inside unit.
Keep one hand free. Remove rings and watch.
5. Disconnect input power conductors from de-energized supply line BEFORE moving a
welding power source.
6. The electrode and work (or ground) circuits are electrically “hot” when the welder is on.
Do not touch these “hot” parts with your bare skin or wet clothing. Wear dry, hole-free
gloves to insulate hands.
7. Insulate yourself from work and ground using dry insulation. Make certain the insulation
is large enough to cover your full area of physical contact with work and ground.
8. Always be sure the work cable makes a good electrical connection with the metal being
welded. The connection should be as close as possible to the area being welded.
9. Ground the work or metal to be welded to a good electrical (earth) ground.
10. Keep the electrode holder, work clamp, welding cable and welding machine in good and
safe work condition. Replace damaged insulation and frayed cables.
11. Never dip the electrode in water for cooling.
1.2 ARC RAYS
1. Use a shield with the proper filter and cover plates to protect your eyes from sparks and
the rays of the arc when welding or while observing open arc welding.
2. Use protective clothing specifically intended for work with welding equipment. It should
be made of durable flame-resistant material to provide ample protection from the arc
rays.
3. Protect other nearby workers with suitable, non-flammable screening. Caution other
workers not to watch the arc nor expose themselves to the arc rays or to hot spatter or
metal.
1.3 FUMES AND GASES
Fumes and gases can cause discomfort or harm, particularly in confined spaces. Take the
following precautions for appropriate health considerations.
1. Read the Material Safety Data Sheets (MSDS) and the manufacturer’s instruction for
metals, consumables, coatings, cleaners, and degreasers
2. Keep your head away from the fumes. Do not inhale welding fumes.
3 If welding is done indoors, make sure proper ventilation is provided by using an adequate
exhaust system at the arc to remove welding fumes and gases.
Summary of Contents for IRONHORSE 300S
Page 18: ...5 3 Main Circuit Diagram ...
Page 19: ...5 4 Front Panel 19 ...
Page 20: ...5 5 Rear Panel 20 ...
Page 21: ...5 6 1 Bottom Chassis Drawing with Part Number Reference ...
Page 22: ...5 6 2 Top Chassis Drawing with Part Number Reference 22 ...
Page 23: ...5 6 3 Inductor Plate Drawing with Part Number Reference 23 ...