This document is an Owner's Manual for the Miller XMS 425 MPa CE, a multiprocess arc welding power source. It provides comprehensive information on safety, specifications, installation, operation, maintenance, troubleshooting, and parts.
The Miller XMS 425 MPa CE is designed for multiprocess welding, offering capabilities for Stick (SMAW), TIG (GTAW), and MIG (GMAW) welding. It is a three-phase, DC, constant current (CC) and constant voltage (CV) arc welding power source. The unit is designed for occupational use and is suitable for outdoor storage, though not for welding during precipitation unless sheltered.
Technical Specifications:
- Input Power: 3-Phase, 50/60 Hz. The Auto-Line circuitry allows the unit to automatically adapt to primary voltages between 208 and 575 VAC without requiring manual relinking.
- Rated Output: 350 Amperes at 34 VDC, with a 60% duty cycle.
- Voltage Range: 10-38 V in CV Mode.
- Amperage Range: 5-425 A in CC Mode.
- Max. Open-Circuit Voltage: 75 VDC.
- RMS Amps Input at Rated Load Output (3-Phase):
- 230 V: 36.1 A
- 380 V: 22.3 A
- 400 V: 20.6 A
- 460 V: 17.8 A
- KVA at Rated Load Output: 14.2 KVA.
- KW at Rated Load Output: 13.6 KW.
- Dimensions (Welding Power Source Only):
- Height (A): 597 mm (23.5 in.)
- Width (B): 349 mm (13-3/4 in.)
- Depth (C): 560 mm (22 in.)
- Rear Panel Height (D): 521 mm (20.5 in.)
- Rear Panel Width (E): 25.3 mm (1 in.)
- Rear Panel Depth (F): 298.5 mm (11-3/4 in.)
- Lifting Eye Height (G): 12.7 mm (0.5 in.)
- Weight (Welding Power Source Only): 52.5 kg (115.7 lb).
- Dimensions (Welding Power Source with Cart and Cooler):
- Height (A): 1510 mm (59.5 in.)
- Width (B): 810 mm (31.9 in.)
- Depth (C): 1110 mm (43.7 in.)
- Weight (Welding Power Source with Cart and Cooler): 130 kg (287 lb).
- IP Rating: IP23S, indicating protection against solid objects greater than 12.5 mm and direct sprays of water up to 60 degrees from vertical.
- Operating Temperature Range: 14 to 104°F (-10 to 40°C).
- Storage Temperature Range: -4 to 131°F (-20 to 55°C).
- Electromagnetic Compatibility (EMC): Class A equipment, complying with IEC61000-3-11 and IEC 61000-3-12. Not intended for residential locations due to potential difficulties in ensuring electromagnetic compatibility.
Usage Features:
- Multiprocess Capability: Supports Stick, TIG, and MIG welding, making it versatile for various applications.
- Duty Cycle: The unit can weld at its rated load for 6 minutes out of every 10-minute period (60% duty cycle) without overheating. If overheating occurs, output stops, a Help message is displayed, and the cooling fan runs. The user must wait 15 minutes for the unit to cool and reduce amperage or voltage.
- Volt-Ampere Curves: Detailed curves show minimum and maximum voltage and amperage output capabilities for both CC and CV modes.
- Remote Control: Features a Remote 14 receptacle for connecting remote controls, providing functionality for 24 volts AC output, contact closure for 24 volts AC, 0 to +10 volts DC output control, current feedback, voltage feedback, and chassis common.
- Auxiliary Power: Includes a 115 Volts AC Duplex Receptacle with supplementary protectors (CB1 and CB2) for powering auxiliary equipment.
- Gas Valve Operation: Supports optional gas valve operation for shielding gas connection, with gas flow starting at the end of post-flow for remote TIG, when output switch is depressed for Lift-Arc Trigger Hold TIG, and when current is detected for Scratch Start TIG. Post-flow time is factory set to 5 seconds but can be adjusted.
- Cooler Connections: Provides 115 VAC to power a cooler and a 7-pin cord for 23 VAC activation, liquid flow presence check, and cooler presence check.
- Wire Feeder Connections: Designed to be used with the XMS 425 wire feeder, providing 23 VAC power and CAN bus signal communication via a 6-pin cord.
- Lift-Arc Trigger Hold TIG: Allows for TIG welding by touching the electrode to the workpiece, momentarily depressing the output switch, and slowly lifting the electrode to form an arc.
- Stick Start Procedure: Guides the user on how to start an arc for Stick welding, including instructions for low OCV (Open Circuit Voltage) stick welding operation.
Maintenance Features:
- Routine Maintenance Schedule: Recommends routine maintenance every 3 months, including checking and replacing damaged or unreadable labels, repairing or replacing cracked/frayed cables, and cleaning/tightening weld connections.
- Blowing Out Inside of Unit: Advises blowing out the inside of the unit every 6 months to ensure proper airflow and prevent dust buildup.
- Troubleshooting Guide: Provides a table of common troubles (e.g., no weld output, erratic weld output, no 115 volts AC output) and their corresponding remedies, such as checking input power, replacing fuses, resetting circuit breakers, and verifying cable connections.
- Electrical Diagram: Includes a detailed electrical diagram (Section 7) for advanced troubleshooting and repair.
- Parts List: Contains a comprehensive parts list (Section 8) for identifying and ordering replacement components.
Safety Precautions:
The manual emphasizes numerous safety precautions, including:
- Electric Shock: Warnings against touching live electrical parts, using dry insulating gloves, insulating from work and ground, and proper grounding.
- Hot Parts: Advises against touching hot parts bare-handed and allowing a cooling period before working on equipment.
- Fumes and Gases: Instructions for proper ventilation and avoiding breathing welding fumes.
- Fire or Explosion: Warnings about flammables, sparks, and hot metal.
- Arc Rays: Emphasizes wearing appropriate eye and body protection.
- Moving Parts: Cautions about keeping hands and body away from moving parts like fans.
- Falling Equipment: Instructions for safe lifting and moving of the unit.
- Overuse: Warnings about exceeding duty cycle and ensuring proper airflow.
- Flying Sparks: Advises wearing a face shield and protective clothing.
- Static (ESD): Instructions for handling static-sensitive components.
- Welding Wire: Cautions against touching the welding wire when the unit is on.
- Battery Explosion: Warnings for units with batteries.
- Compressed Gases: Instructions for safe handling of gas cylinders.
- EMF Information: Provides guidelines to minimize exposure to electromagnetic fields, especially for individuals with medical implants.
- California Proposition 65 Warnings: Notifies users about chemicals known to cause cancer and birth defects.
The manual also includes a "True Blue Warranty" section, outlining the limited warranty terms and conditions for Miller equipment, with varying warranty periods for different components.
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