Lincoln Electric LF-72/74 User Manual

LF-72/74 SINGLE/DUAL

Section B-1

Section B-1

TABLE OF CONTENTS

- OPERATION SECTION -

Operation ................................................................................................................Section B

Safety Precautions .......................................................................................................B-2

Graphic Symbols ..........................................................................................................B-2

Common Welding Abbreviations..................................................................................B-3

Product Description......................................................................................................B-3

Recommended Processes and Required Equipment ..................................................B-3

Front Panel Controls and Connections ........................................................................B-4

1. Remote Voltage Control Kit (Optional)................................................................B-5

2. Burnback and Postflow Timer Kit (Optional) ......................................................B-5

3. Thermal LED, Motor Overload ............................................................................B-5

4. Cold Feed/Gas Purge Switch .............................................................................B-5

5. 2 Step - Trigger Interlock Switch.................................................................B-5/B-6

6. Wire Feed Speed Knob ......................................................................................B-6

7. Gun Receiver Bushing ........................................................................................B-6

8. Trigger Connector 5-Pin Amphenol ....................................................................B-6