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Miller
Welding System
XR-30A
Miller XR-30A User Manual
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X
R A A
n
d X
R W
(W
ith
Quick
Disconnect)
™
Processes
OM-236297P
2016−10
MIG (GMA
W) W
elding
File:
MIG (GMA
W)
™
Description
Semi-Automatic, Air/Water-
Cooled, MIG (GMAW) W
elding
Gun
CE
200 Ampere (Air) Push-Pull W
elding Gun
400 Ampere (W
ater) Push-Pull Welding Gun
For product information,
Owner’
s
Manual translations,
and more, visit
www.MillerWelds.com
2
Table of Contents
Default Chapter
3
Table of Contents
3
Section 1 −Safety Precautions for Gmaw Welding Guns − Read before Using
5
Symbol Usage
5
Arc Welding Hazards
5
Proposition 65 Warnings
6
Principal Safety Standards
6
EMF Information
6
Section 2 − Mesures de Sécurité Visant Les Pistolets de Soudage Gmaw − À Lire Avant
7
Utilisation
7
Signification des Symboles
7
Dangers Relatifs Au Soudage À L'arc
7
Proposition Californienne 65 Avertissements
8
Principales Normes de Sécurité
8
Informations Relatives Aux CEM
8
Section 3 − Definitions
9
Additional Safety Symbols and Definitions
9
Miscellaneous Symbols and Definitions
9
Section 4 − Specifications
10
Gun Specifications
10
Duty Cycle and Overheating
10
Environmental Specifications
10
Section 5 − Installation
11
Connections with a Constant Current (CC), Constant Voltage (CV) or Constant Current/Constant Voltage (CC/CV) Welding Power Source Having a 14-Socket Receptacle
11
Air-Cooled Gun Connections
12
Water-Cooled Gun Connections
13
Millermatic 350/350P Water Cooled Gun Connections
14
Threading Welding Wire through Millermatic 350/350P
15
Threading Welding Wire through XR-Control Feeder
16
Adjusting Tension at Feeder
17
10-Pin Plug Information
18
Removing Top Cover of Pistol Grip Gun
18
Threading Welding Wire through Gun
19
Section 6 − Operation
20
Gun Controls
20
Shielding Gas
20
Sequence of Gas Metal Arc Welding (GMAW) − Continuous or Spot
20
Coolant Supply for Water-Cooled Models Only
21
Section 7 − Maintenance & Troubleshooting
22
Replacing the Gun Liner
23
Changing Gun Contact Tip
24
Replacing or Cleaning Gun Drive Roll in Pistol-Grip Guns
24
Replacing or Cleaning Gun Drive Roll Bearing in Pistol-Grip Guns
25
Replacing Head Tube Liner in Pistol-Grip Guns
25
Removing Diffuser in Air and Water-Cooled Pistol-Grip Guns
26
Troubleshooting
26
Section 8 − Electrical Diagrams
27
Section 9 − Parts List
28
Section 10 − Parts List Including Consumables
32
5
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Miller XR-30A Specifications
General
Input Frequency
50 / 60 Hz
Rated Output
300A at 32V, 60% duty cycle
Duty Cycle
60%
Wire Diameter
0.8–1.2 mm
Processes
Pulsed MIG
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