Be sure this information reaches the operator. You can get extra copies through Your supplier. caution these instructions are for experienced operators. if you are not fully familiar with the principles of operation and safe practices for arc welding and cutting equipment, we urge you to read our booklet, “precautions and safe practices for arc Welding, cutting, and gouging,”...
- introduction ESAB welding equipment is designed to operate both safely and effectively. Sensible attention to operating procedures, precautions, and safe practices is required to achieve a full measure of usefulness. Whether an individual is involved with operation, servicing, or as an observer, compliance with established precautions is mandatory.
section 1 safetY safety fires anD explosions -- heat from flames and arcs can start fires. hot Warning: these safety precautions are slag or sparks can also cause fires and for your protection. they summarize explosions. therefore: precautionary information from the references listed in additional safety 1.
Page 6
section 1 safetY electrical shock -- contact with 3. Welders should use the following procedures to live electrical parts and ground can minimize exposure to EMF: cause severe injury or death. Do not use ac welding current in damp areas, A.
Page 7
section 1 safetY 2. Before performing any maintenance work inside 5. WARNING: This product, when used for welding a Plasma Console, disconnect the Plasma Console or cutting, produces fumes or gases which contain from the incoming electrical power. chemicals known to the State of California to cause birth defects and, in some cases, cancer.
Page 8
section 1 safetY meaning of sYmBols - as used throughout this manual: means attention! Be alert! Your safety is involved. Danger means immediate hazards which, if not avoided, will result in immediate, serious personal injury or loss of life. caution means potential hazards which could result in personal injury or loss of life.
section 2 introDuction introDuction The Heliarc AC/DC 281i, 283i and 353i are state of the art DC and squarewave AC power sources for SMAW (MMA) or GTAW (TIG) welding. They utilize inverter based technology in combination with microprocessor con- trol. The 281i and 283i models are rated 250A / 280A at 100% duty and the more powerful 353i model up to 350A@ 45% duty.
Page 10
section 2 introDuction Heliarc 281i/283i/353i AC/DC For advanced GTAW (TIG) welding Specifications Heliarc 281i AC/DC Heliarc 283i AC/DC Heliarc 353i AC/DC Input voltage 208-240 V 1 ph 50/60 H 460 V 3 ph 50/60 Hz 460 V 3 ph 50/60 Hz Open circut voltage Setting range, TIG AC/DC 4-280 A...
1. radio interference ESAB welding power sources have been designed to high standards of electromagnetic compatibility. However, arc welding, by its very nature, generates radio-frequency energy and may cause interference. By installing and using the equipment correctly, in accordance with these instructions, the problems of interference may be minimized.
Page 12
section 3 installation 3. connection to the supply The Heliarc AC/DC 281i requires a single phase 208-240V 60Hz electricity supply fused at 50A for all TIG welding and Stick applications. The 283i and 353i need a standard 3 phase 460V 60Hz electricity supply, note no neutral connection is required. Supplies should be fused at 20A for the 283i and 32A for the 353i, using HRC type fuses.
Page 15
section 4 assemBlY SECTION 4 ASSEMBLY POWER SOURCE TO TROLLEY ASSEMBLY fig. 4-3...
Page 16
section 4 assemBlY SECTION 4 ASSEMBLY POWER SOURCE TO TROLLEY ASSEMBLY fig. 4-4 View From “A”...
Page 17
section 4 assemBlY SECTION 4 ASSEMBLY COOLER ASSEMBLY fig. 4-5 ASSEMBLY SEQUENCE 1_Remove screws M5x12 (8) and door panel (7) 2_Insert the input cable with plug into the trolley. Take it out from the back hole (remove first the plastic cap). Fasten the input cable with screws M5x12 (3) on the back panel (see view "A"). IMPORTANT OPERATION 1_Remove the plastic cap (5) 2_Once the Cooler is instal fasten the safety screw M6x16 (6)
Page 18
section 4 assemBlY remove upper extension pieces * for 281i & 283i. Warning ensure the green/YelloW earth Wire is correctlY connecteD to the lh terminal. Before energizing the cooler ensure it is correctly filled with coolant, refer to W.C.U. Instruction Sheet, and connect the TIG torch cooling hoses to its front panel.
section 5 operation operation controls & operation 1. switching on 1.1 The rear panel mounted rotary switch is the mains power ON/OFF switch. the computer control sYstem memorizes the poWer source Warning control settings at poWer off. if the unit Was in mma moDe at sWitch-off then When the unit is sWitcheD on, ocv Will Be pres- ent at the WelDing output.
Page 20
section 5 operation controls & operation (con't.) 2.3 Momentarily press the Remote Control mode key. The REM. ON LED will light and the L.H. display will flash "REM". Whilst the display is flashing set the minimum/start value of the remote control as required between 4A and 100A using the Main Setting Control and R.H.
Page 21
section 5 operation SECTION 5 OPERATION CONTROLS & OPERATION (con't.) 5. Selecting Pulse Mode - See Figure 7 Figure 7 - DC & AC Pulsing 5.1 In the standby mode, press the Pulse mode key (F). The associated green ON PULSE LED will illuminate and the digital displays will flash "dut"...
Page 22
section 5 operation controls & operation (con't.) 7. tig Welding with 2 stroke torch switch (2t) and hf start - see figure 8 Amps Strike Post Purge Time Slope Down Slope Up Time Time t Torch Switch figure 8 - tig 2t operation 7.1 Set the process/mode to TIG 2T and press the HF ON key to select HF start.
Page 23
section 5 operation CONTROLS & OPERATION (con't.) 8.1 Set the process/mode selector to TIG 4T and press the HF ON key to select HF start. 8.2 Set the desired welding current with the main setting control A. 8.3 Press the SL slope up/down key once to adjust the down slope (DS displayed in V window). Press the SL slope up/down key twice to adjust the up slope (US displayed in V window).
Page 24
section 5 operation SECTION 5 OPERATION CONTROLS & OPERATION (con't.) 10. GTAW (TIG) Welding with Manually Sequenced Pulsing - See Figure 11 Figure 11 - TIG Lift Arc Mode 10.1 Set the process to TIG mode using the mode selector key. 10.2 Set the desired "peak"...
Page 25
OPTIMIZING TIG WELDING PERFORMANCE 1. Tungsten Electrode Types ESAB recommends the use of either lanthanated or ceriated tungstens for both AC and DC applications. Either type is suitable for optimum arc striking and stable performance. In the past, for AC TIG applications, pure tungsten would be used. Not the case for these new Heliarc ACDC Square Wave Inverter machines due to the new enhancements in Waveform/Balance control.
Page 26
section 5 operation SECTION 5 OPERATION OPTIMIZING TIG WELDING PERFORMANCE (con't.) 3. Maximum Current Ratings for Tungsten Electrodes 1/16 3/32" 1/8" 150A 240A 380A AC Balanced 100A 150A 4. AC GTAW (TIG) Welding Using FC-5C Foot Control Unlike other AC TIG equipments the Heliarc AC/DC 281i, 283i and 353i do not use continuous HF to maintain the AC TIG arc.
Page 29
SECTION 5 OPERATION section 5 operation 5. Front Control Panel Description and Parameters (con't.)
Page 30
section 5 operation 5. front panel Description and parameters (con't.) 1. LED Voltage input - The LED is lit when there is presence of input voltage. 2. LED Voltage output - The LED is lit when there is presence of output voltage (in Tig mode only when you press the trigger).
section 5 operation 5. front panel Description and parameters (con't.) 17. Remote Control Button - This button sets the remote control function. The Display A shows the maximum current. By pressing the button the LED is blinking and adjust the minimum current. The Display V shows MIN and Display A the value from 0-100 Amp.
Page 46
MAINTENANCE WARRANTY ESAB offers a full, normally on-site, guarantee on all its welding and cutting equipment. The Heliarc AC/DC 281i, 283i and 353i power sources are guaranteed for a period of 36 months from date of purchase. If during this...
Need help?
Do you have a question about the Heliarc 353iAC/DC and is the answer not in the manual?
Questions and answers