ESAB 251cv - Default Chapter; Table of Contents

2
USER RESPONSIBILITY
This equipment will perform in conformity with the description thereof contained in this manual and accompanying labels and/or inserts
when installed, operated, maintained and repaired in accordance with the instructions provided. This equipment must be checked
periodically. Malfunctioning equipment should not be used. Parts that are broken, missing, worn, distorted or contaminated should be
replaced immediately. Should such repair or replacement become necessary, the manufacturer recommends that a telephone or written
request for service advice be made to the Authorized Distributor from whom purchased.
This equipment or any of its parts should not be altered without the prior written approval of the manufacturer. The user of this equipment
shall have the sole responsibility for any malfunction which results from improper use, faulty maintenance, damage, improper repair
or alteration by anyone other than the manufacturer or a service facility designated by the manufacturer.
SECTION 1 DESCRIPTION ..................................................... 7
1.1 General................................................................. 7
1.2 Receiving-Handling .............................................. 7
1.3 Description ........................................................... 7
1.3.1 251cv Power Source ............................................ 7
1.3.2 Optional Controls ................................................. 7
1.4 Optional Accessories ........................................... 7
1.4.1 MT-250SG Spool-on-Gun .................................... 7
1.4.2 ST-23A Spool-On-Gun Torch and Adaptor Kit .... 7
1.4.3 TR-24 and TR-251cv Trucks ............................... 7
1.4.4 Torch/Wire Feed Accessories ............................. 7
1.5 Safety ................................................................... 7
1.6 Duty Cycle and Curves ........................................ 7
1.7 Volt/Ampere Curves ............................................. 8
SECTION 2 INSTALLATION ................................................... 9
2.1 Location ................................................................ 9
2.1.1 Lifting Eyebolt....................................................... 9
2.2 Electrical Input Connections ................................ 9
2.2.1 Input Electrical Requirements.............................. 9
2.2.2 Input Conductor Connections ............................ 10
2.3 Output Welding Connections ............................. 10
2.4 Control Connections .......................................... 10
2.4.1 Wire Feeder Control........................................... 10
2.4.2 42V Circuit Breaker ............................................ 10
2.4.3 24V Circuit Breaker ............................................ 10
SECTION NO
PARAGRAPH TITLE PAGE NO.
TABLE OF CONTENTS
SECTION NO
PARAGRAPH TITLE PAGE NO.
SECTION 3 OPERATION ...................................................... 11
3.1 Controls .............................................................. 11
3.1.1 Power Switch (ON-OFF) .................................... 11
3.1.2 Contactor Control ............................................... 11
3.1.3 Voltage Panel/Remote Switch ........................... 11
3.1.4 Voltage Control .................................................. 11
3.1.3 Feeder Selector Switch ...................................... 11
3.2 Operating Procedures ........................................ 12
3.2.1 Operating Safety Precautions ............................ 12
3.2.2 Pre-Weld Requirements..................................... 12
3.2.3 Set-Up Procedure .............................................. 13
3.2.4 Welding Operation ............................................. 13
SECTION 4 MAINTENANCE................................................. 15
4.1 General............................................................... 15
4.2 Inspection and Service ....................................... 15
4.3 Power Source ..................................................... 15
4.3.1 Fan Motor ........................................................... 15
4.3.2 Transformer ........................................................ 15
4.3.3 Over Temperature Protection ............................ 15
SECTION 5 TROUBLESHOOTING....................................... 16
5.1 General............................................................... 16
SECTION 6 PARTS ............................................................... 21
6.1 General............................................................... 21
6.2 Ordering ............................................................. 21