Tweco C-20C User Manual
C-20C
®
CUTSKILL
PLASMA CUTTING
SYSTEM
Operation Manual
Rev. AA.01 Issue Date: March 26, 2007 Manual 0-4687
Operating Features:
PLASMA
WARNINGS
Read and understand this entire Manual and your employer’s safety practices before installing,
operating, or servicing the equipment.
While the information contained in this Manual represents the Manufacturer's best judgement,
the Manufacturer assumes no liability for its use.
Plasma Cutting Power Supply
CutSkill
®
SL100™ 1Torch™
Operation Manual Number 0-4687
Covered under U.S. Patents.
Published by:
Thermadyne Corporation
82 Benning Street
West Lebanon, New Hampshire, USA 03784
(603) 298-5711
www.thermal-dynamics.com
©Copyright 2005, 2006, 2007 by
Thermal Dynamics Corporation
All rights reserved.
Reproduction of this work, in whole or in part, without written permission of the publisher is prohibited.
The publisher does not assume and hereby disclaims any liability to any party for any loss or damage
caused by any error or omission in this Manual, whether such error results from negligence, accident, or
any other cause.
Printed in the United States of America
Publication Date: March 26, 2007
Record the following information for Warranty purposes:
Where Purchased:____________________________________
Purchase Date:_______________________________________
Power Supply Serial #:________________________________
Torch Serial #:________________________________________
TABLE OF CONTENTS
SECTION 1:
GENERAL INFORMA TION ................................................................................................ 1-1
1.01 Notes, Cautions and Warnings ...................................................................... 1-1
1.02 Important Safety Precautions....................................................................... 1-1
1.03 Publications .................................................................................................. 1-2
1.04 Statement of Warranty .................................................................................. 1-4
2.0 INTRODUCTION .................................................................................................................. 2-1
2.01 INTRODUCTION .......................................................................................... 2-1
2.02 GENERAL SPECIFICA TION......................................................................... 2-1
2.03 Features ....................................................................................................... 2-1
2.04 Torch Specifications ..................................................................................... 2-2
2.05 System Contents.......................................................................................... 2-2
2.06 T ransporting Methods ................................................................................... 2-2
3.0 Installation ........................................................................................................................... 3-1
3.01 Site Selection ............................................................................................... 3-1
3.02 Electrical Input Connections ......................................................................... 3-1
3.03 T orch ............................................................................................................ 3-1
4.0 OPERA TION ........................................................................................................................ 4-1
4.01 Front Control Panel ....................................................................................... 4-1
4.02 Preparations For Operating ........................................................................... 4-2
SECTION 5:
SERVICE .......................................................................................................................... 5-1
5.01 Basic T roubleshooting Guide......................................................................... 5-1
Appendix 1: Operating Sequence, Block Diagram .....................................................................A-1
Appendix 2: Torch Connection ................................................................................................... A-2
Appendix 3: System Schematic ................................................................................................ A-3
SECTION 1:
GENERAL INFORMATION
1.01 Notes, Cautions and Warnings
Throughout this manual, notes, cautions, and warnings
are used to highlight important information. These highlights are categorized as follows:
NOTE
An operation, procedure, or background information which requires additional emphasis or is helpful in efficient operation of the system.
CAUTION
A procedure which, if not properly followed, may
cause damage to the equipment.
WARNING
A procedure which, if not properly followed, may
cause injury to the operator or others in the operating area.
1.02 Important Safety Precautions
WARNINGS
OPERATION AND MAINTENANCE OF
PLASMA ARC EQUIPMENT CAN BE DANGEROUS AND HAZARDOUS TO YOUR
HEALTH.
Plasma arc cutting produces intense electric and
magnetic emissions that may interfere with the
proper function of cardiac pacemakers, hearing aids,
or other electronic health equipment. Persons who
work near plasma arc cutting applications should
consult their medical health professional and the
manufacturer of the health equipment to determine
whether a hazard exists.
To prevent possible injury, read, understand and
follow all warnings, safety precautions and instructions before using the equipment. Call 1-603-2985711 or your local distributor if you have any questions.
GASES AND FUMES
Gases and fumes produced during the plasma cutting
process can be dangerous and hazardous to your health.
• Keep all fumes and gases from the breathing area.
Keep your head out of the welding fume plume.
• Use an air-supplied respirator if ventilation is not
adequate to remove all fumes and gases.
• The kinds of fumes and gases from the plasma arc
depend on the kind of metal being used, coatings
on the metal, and the different processes. You must
be very careful when cutting or welding any metals which may contain one or more of the following:
Antimony Chromium Mercury
Arsenic Cobalt Nickel
Barium Copper Selenium
Beryllium Lead Silver
Cadmium Manganese Vanadium
• Always read the Material Safety Data Sheets
(MSDS) that should be supplied with the material
you are using. These MSDSs will give you the information regarding the kind and amount of fumes
and gases that may be dangerous to your health.
• For information on how to test for fumes and gases
in your workplace, refer to item 1 in Subsection 1.03,
Publications in this manual.
• Use special equipment, such as water or down draft
cutting tables, to capture fumes and gases.
• Do not use the plasma torch in an area where combustible or explosive gases or materials are located.
• Phosgene, a toxic gas, is generated from the vapors
of chlorinated solvents and cleansers. Remove all
sources of these vapors.
• This product, when used for welding or cutting, produces fumes or gases which contain chemicals
known to the State of California to cause birth defects and, in some cases, cancer. (California Health
& Safety Code Sec. 25249.5 et seq.)
ELECTRIC SHOCK
Electric Shock can injure or kill. The plasma arc process
uses and produces high voltage electrical energy. This
electric energy can cause severe or fatal shock to the operator or others in the workplace.
• Never touch any parts that are electrically “live” or
“hot.”
Manual 0-4687 1-1 GENERAL INFORMATION
• Wear dry gloves and clothing. Insulate yourself
from the work piece or other parts of the welding
circuit.
• Repair or replace all worn or damaged parts.
• Extra care must be taken when the workplace is
moist or damp.
• Install and maintain equipment according to NEC
code, refer to item 9 in Subsection 1.03, Publications.
• Disconnect power source before performing any service or repairs.
• Read and follow all the instructions in the Operating Manual.
FIRE AND EXPLOSION
Fire and explosion can be caused by hot slag, sparks, or
the plasma arc.
• Be sure there is no combustible or flammable material in the workplace. Any material that cannot be
removed must be protected.
• Ventilate all flammable or explosive vapors from
the workplace.
• Do not cut or weld on containers that may have held
combustibles.
• Provide a fire watch when working in an area where
fire hazards may exist.
• Hydrogen gas may be formed and trapped under
aluminum workpieces when they are cut underwater or while using a water table. DO NOT cut alu-
minum alloys underwater or on a water table unless the hydrogen gas can be eliminated or
dissipated. Trapped hydrogen gas that is ignited
will cause an explosion.
NOISE
Noise can cause permanent hearing loss. Plasma arc processes can cause noise levels to exceed safe limits. You
must protect your ears from loud noise to prevent permanent loss of hearing.
• To protect your hearing from loud noise, wear protective ear plugs and/or ear muffs. Protect others
in the workplace.
• Noise levels should be measured to be sure the decibels (sound) do not exceed safe levels.
• For information on how to test for noise, see item 1
in Subsection 1.03, Publications, in this manual.
PLASMA ARC RAYS
Plasma Arc Rays can injure your eyes and burn your skin.
The plasma arc process produces very bright ultra violet
and infra red light. These arc rays will damage your eyes
and burn your skin if you are not properly protected.
• To protect your eyes, always wear a welding helmet or shield. Also always wear safety glasses with
side shields, goggles or other protective eye wear.
• Wear welding gloves and suitable clothing to protect your skin from the arc rays and sparks.
• Keep helmet and safety glasses in good condition.
Replace lenses when cracked, chipped or dirty.
• Protect others in the work area from the arc rays.
Use protective booths, screens or shields.
• Use the shade of lens as suggested in the following
per ANSI/ASC Z49.1:
Minimum Protective Suggested
Arc Current Shade No. Shade No.
Less Than 300* 8 9
300 - 400* 9 12
400 - 800* 10 14
* These values apply where the actual arc is clearly
seen. Experience has shown that lighter filters may
be used when the arc is hidden by the workpiece.
1.03 Publications
Refer to the following standards or their latest revisions
for more information:
1. OSHA, SAFETY AND HEALTH STANDARDS, 29CFR
1910, obtainable from the Superintendent of Documents,
U.S. Government Printing Office, Washington, D.C.
20402
2. ANSI Standard Z49.1, SAFETY IN WELDING AND
CUTTING, obtainable from the American Welding Society, 550 N.W. LeJeune Rd, Miami, FL 33126
3. NIOSH, SAFETY AND HEALTH IN ARC WELDING
AND GAS WELDING AND CUTTING, obtainable from
the Superintendent of Documents, U.S. Government
Printing Office, Washington, D.C. 20402
4. ANSI Standard Z87.1, SAFE PRACTICES FOR OCCUPATION AND EDUCATIONAL EYE AND FACE PROTECTION, obtainable from American National Standards Institute, 1430 Broadway, New York, NY 10018
5. ANSI Standard Z41.1, STANDARD FOR MEN’S
SAFETY-TOE FOOTWEAR, obtainable from the American National Standards Institute, 1430 Broadway, New
York, NY 10018
GENERAL INFORMATION 1-2 Manual 0-4687
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