Sealey MW140A - Manual (Page 3)

2. INTRODUCTION
3. SPECIFICATION
Model No. ...........................MW140A ...................... MW160A .................................MW180A ..................... MW200A
Peak Power: .............................. 140A .............................160A ........................................180A ............................200A
output: ................................10 - 140A .......................10 -160A ................................ 10 - 180A .......................10-200A
duty Cycle: ................... 40% @ 140A ................40% @ 160A ...........................40% @ 180A ...............40% @ 200A
electrode Capacity: ..... Ø1.6 - 4.0mm ...............Ø1.6 - 4.0mm ..........................Ø1.6 - 4.0mm ................ Ø1.6-4.0mm
Max Absorbed Power: ................ 4kW ...........................4.8kW ......................................5.5kW .............................6kW
Mains Voltage: ..................230V - 1ph ................... 230V - 1ph ..............................230V - 1ph .....................230V-1ph
Insulation Class: .............................. A ...................................A ..............................................A ..................................A
Protection: .................................IP21s ........................... IP21s ......................................IP21s .......................... IP21s
Weight: .......................................6.7kg ............................... 7kg .....................................7.25kg ......................... 7.49kg
Accessory Kit Included ................... Yes ............................... Yes ..........................................Yes .............................. Yes
Original Language Version
 DANGER! Lead-, cadmium-, zinc-, mercury- and beryllium-, bearing materials, when welded (or cut) may produce harmful
concentrations of toxic fumes. Adequate local exhaust ventilation must be used, or each person in the area as well as the operator must
wear an air- supplied respirator. For beryllium, both must be used. Metals coated with or containing materials that emit toxic fumes should
not be heated unless coating is removed from the work surface, the area is well ventilated, or the operator wears an air-supplied respirator.

DO NOT work in an unventilated confined space. If necessary, wear an air-supplied respirator.
 WARNING: Generator engine exhaust must be vented to the outside air. Carbon monoxide can kill.
PROTECTION FROM ARC

WARNING: Use welding head shield to protect eyes and avoid exposing skin to ultraviolet rays given off by electric arc. looking at
an arc momentarily with unprotected eyes (particularly a high intensity gas-shielded arc) can cause a retinal burn that may leave a
permanent dark area in the field of vision.

Before welding whilst wearing contact lenses, seek advice from your optician.
 Avoid unintentional contact with workpiece. Accidental or uncontrolled arcing on the electrode holder may be dangerous.
 do NoT hit the electrode on the workpiece, this may damage the electrode and make strike-up difficult.
 Wear safety welding gauntlets.
WELDING ENVIRONMENT

locate the inverter in a suitable work area.
 see section 11 regarding electromagnetic Compatibility.
 Keep the work area clean and tidy and free from unrelated materials. Also ensure that the work area has adequate lighting.
 DO NOT get inverter wet or use in damp or wet locations or areas where there is condensation.
 First aid facilities and a qualified first aid person should be available during welding operations.
 For production welding, a separate room or enclosed bay should be provided. In open areas, surround the operation with low reflective,
non-combustible screens or panels. Allow for free air circulation, particularly at floor level. Provide face shields for all persons who will be
looking directly at the weld. Before starting to weld, make sure that screen or bay doors are closed.

ALWAYS ensure that there is full free air circulating around the outer casing of the machine, and that the louvres are unobstructed.
FIRE HAZARD

WARNING: Be aware that flying sparks or falling slag can pass through cracks, along pipes, through windows or doors, and
through wall or floor openings, out of sight of the operator. Sparks and slag can fly 10m.

DO NOT weld within 10 metres of combustible materials (including building construction materials).
 DO NOT weld adjacent to openings (concealed or visible) in floors or walls within 10m that can expose combustibles to sparks.
 DO NOT weld near to walls, ceilings, roofs or metal partitions where there are combustibles that can be ignited by radiant or conducted heat.
 Have suitable fire extinguishing equipment available and someone to use it during welding operations and for some time after welding
ceases. After work is done, check that area is free of sparks, glowing embers, and flames.
PRODUCT CARE & MAINTENANCE

DO NOT attempt to fit any unapproved electrode holder, components, or parts to the inverter unit.
 When not in use, store the inverter in a safe, dry, childproof area.
 Keep the inverter clean for best and safest performance.
 WARNING: If the case is opened for maintenance or repair, wait 10-15 seconds after the unit is switched off for the capacitor to discharge.
 DO NOT remove any of the panels unless the machine is disconnected from the supply,
 DO NOT use the inverter with any of the panels removed.
lightweight, powerful and incredibly versatile, inverters offer many advantages over traditional transformer type welders. Inverters use state-
of-the-art electronic components to produce fully portable power sources for arc welding. For example, Model No. MW160A will produce up to
160Amps at 40% duty cycle; a conventional 160Amp welder would have a duty cycle of around 10%. Manufactured from pressed steel with a
powder coated finish for extra corrosion resistance, with ergonomically designed composite end to a stylish design and allowing these models
to weigh under 8kg. Ideal for the mobile technician or applications where the power unit needs to be taken to the job. Featuring composite
control panel cover. For safe and easy transportation, carry handle and hanging hooks for the storage of accessory cables. supplied in tough
composite carry-case including earth clamp and electrode holder.
4. CABLE CONNECTION
 WARNING! Ensure that the inverter is not plugged into the mains power supply before connecting or disconnecting cables.
For electrical installation, see Safety Instructions (Section 1).
 WARNING! Failure to follow the electrical safety instructions may affect the operating performance and could damage the
built-in safety system which, in turn, could result in personal injury or fatality and will invalidate the warranty.
4.1. WELDING CABLE “ELECTRODE HOLDER” CONNECTION
Before connecting cables it is important to refer to the electrode manufacturer’s instructions on the electrode packaging which will
indicate the correct polarity connection for the electrode, together with the most suitable current to use.
4.2. ARC WELDING
In principle, when ARC welding the electrode Holder ”PosITIVe” is normally connected to the “PosITIVe” (+) terminal (fig.1).
4.3. WELDING “RETURN CABLE” - (WORK CLAMP) CONNECTION
The WoRK ClAMP cable is connected to the terminal not occupied by the electrode holder cable.
The clamp is connected to:
a) The workpiece, or
b) A metallic work bench. The connection must be as close to the proposed weld as possible.
MW140A MW160A MW180A MW200A Issue No1 29/01/13 © Jack sealey limited