Issued March 2021 • Index No. DC/35.

Maxstar 280 Series ® TIG/Stick Welding

Power Source

Industrial Applications Processes Input Power 208–575 V, 3-phase or 1-phase power

Quick Precision fabrication
Petro chemical
DC TIG (GTAW)
Pulsed TIG (GTAW-P)
Amperage Range 1–280 A (DC)
Specs Aerospace Stick (SMAW) Rated Output 250 A at 20 V, 60% duty cycle
Food/beverage industry Air carbon arc (CAC-A)
Dairy Net Weight 47 lb. (21.3 kg)
Shipboard

Update and expand. Front panel

memory card data port provides DC TIG Features
the ability to easily update software
and expand product features. Pulse. Pulsing can increase
Visit MillerWelds.com/TIGSoftware puddle agitation, arc stability
for the latest software updates and travel speeds while reducing
and expansions. heat input and distortion. DX
models provide extended ranges.
Pro-Set™ eliminates the guesswork
when setting weld parameters. Exceptionally smooth and
Use Pro-Set when you want the precise arc for welding exotic
speed, convenience and confidence materials.
of preset controls. Simply select
the feature and adjust until Pro-Set DC Stick Features
appears on the display. Dual schedule allows operators
to switch welding parameters
Sleep timer conserves electricity. for specific electrodes without
This programmable feature will power readjusting the machine,
down the machine if it sits idle for a minimizing downtime and
specific time. enhancing quality. Base model
Maxstar 280 Maxstar 280 DX only (not DX).
DIG control allows the arc
characteristics to be changed
Allows for any input voltage hookup for specific applications and
(208–575 V) with no manual linking, Blue Lightning™ high-frequency (HF) arc starter for electrodes. Lower the DIG
providing convenience in any job setting. non-contact arc initiation. Provides more consistent arc setting for smooth running
Ideal solution for dirty or unreliable power. starts and greater reliability compared to traditional electrodes like E7018 and
HF arc starters. increase the DIG setting for
Cooler Power Supply (CPS) is an
stiffer, more penetrating
integrated 120-volt dedicated-use Meter calibration allows digital meters to be calibrated electrodes like E6010.
receptacle for the Coolmate™ 1.3. for certification.
Available on select models, see page 6. Hot Start™ adaptive control
Wind Tunnel Technology protects internal electrical
™ provides positive arc starts
Cooler-On-Demand™ feature operates components from airborne contaminates, extending the without sticking.
the auxiliary cooling system only when product life. Stick-Stuck detects if the
needed, reducing noise, energy use, and
electrode is stuck to the part
airborne contaminants pulled through the Fan-On-Demand™ power source cooling system operates
and turns the welding output
cooler. Available on CPS models only. only when needed, reducing noise, energy use and the
off to safely and easily remove
amount of contaminants pulled though the machine.
the electrode. Menu selectable.

Power source is warrantied for three years, parts and labor.

Miller Electric Mfg. LLC Equipment Sales US and Canada MillerWelds.com

An ITW Welding Company Phone: 866-931-9730
1635 West Spencer Street FAX: 800-637-2315
P.O. Box 1079 International Phone: 920-735-4554
Appleton, WI 54912-1079 USA International FAX: 920-735-4125
 Specifications (Subject to change without notice.)
Welding Max. Open-
Welding Input Amperage Amps Input at Rated Load Output, 50/60 Hz Circuit Net
Mode Power Range Rated Output 208 V 230 V 400 V 460 V 575 V KVA KW Voltage Dimensions Weight
TIG 3-phase 1 – 280 A 250 A at 20 V, 21 19 11 9 7 7.6 7.3 60 VDC H: 13.6 in. (346 mm) 47 lb.
(GTAW) 60% duty cycle (11 VDC**) W: 8.6 in. (219 mm) (21.3 kg)
1-phase 1 – 280 A 250 A at 20 V, 35 32 18 16 13 7.3 7.1 D: 22.5 in. (569 mm) 50 lb.
60% duty cycle (22.7 kg)
3-phase 5 – 280 A 250 A at 30 V, * * 14 13 10 9.9 9.6 with CPS
Stick
(SMAW) 60% duty cycle
1-phase 5 – 280 A 180 A at 27.2 V, 32 29 * * * 6.7 6.5
60% duty cycle*

*Refer to owner’s manual for complete ratings. **Low OCV sense voltage for stick and Lift-Arc ™ TIG.
IP23 rating — This equipment is designed for outdoor use. It may be stored, but is not intended to be used outside during precipitation unless sheltered.
Operating temperature range is 14 to 104°F (-10 to 40°C). Storage temperature range is -22 to 149°F (-30 to 65°C). Portions of the preceding text are contained in
EN 60974-1: “Welding power sources for arc welding equipment.”
Certified by Canadian Standards Association to both the Canadian and U.S. Standards. All CE models conform to the applicable parts of the IEC 60974 series of standards.

Performance Data
Input TIG (GTAW) Stick (SMAW) DC TIG Material Stick Electrode Carbon Arc Gouging Generator
Power Duty Cycle Duty Cycle Thickness Range Maximum Diameter (CAC-A) Maximum Requirement
380–575 V 280 A, 40% 280 A, 35% 0.004 – 3/8 in. 6010: 1/4 in. (6.4 mm) 3/16 in. (4.8 mm) 12.5 kW
250 A, 60% 200 A, 60% (0.1– 9.5 mm) 7018: 7/32 in. (5.6 mm)
200 A, 100% 160 A, 100% 7024: 3/16 in. (4.8 mm)
208–240 V 280 A, 40% 280 A, 15%
250 A, 60% 180 A, 60%
200 A, 100% 160 A, 100%

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Coolmate 1.3 Cooler ™

• Maxstar® models with CPS turn Coolmate 1.3 • Efficient fin and tube heat exchanger
on and off • Factory-set pressure relief valve (55 psi)
• Power indicator light maintains consistent pressure during operation
• Fluid level sight window • Filter and coolant filling spout are conveniently
• Rustproof polyethylene-molded coolant tank located
and filler spout • Brass-body, positive displacement rotary vane
• 1/4 hp motor is thermally protected to guard pump provides consistent coolant flow and
against overheating pressure rating with long pump-life expectancy

Input Power Maximum Current Draw Maximum Cooling Capacity Rated Cooling Capacity Tank Capacity Dimensions Net Weight
115 V, 60 Hz 4.7 A (60 Hz) 3,400 W (11,600 Btu/hr.) 1,330 W (4,540 Btu/hr.) 1.3 gal. (4.9 L) H: 11.25 in. (286 mm) 43 lb.
3.8 qt./min. (3.6 L/min.) 1.1 qt./min. (1 L/min.) W: 10.375 in. (264 mm) (20 kg)
D: 24 in. (610 mm)

Weldcraft W-280 (WP-280) TIG Torch

™

• Two-piece torch head and exclusive Super Cool™ • Secure mechanical fittings and connections
Technology provides additional surface area to minimize leakage
increase cooling efficiency and capacity
• Torch body includes an anti-rotation feature
and multi-position locking to prevent handle
movement during welding and improve
operator control

Cooling Method AC Rating DC Rating Consumables Electrode Range Cable

Water-cooled 195 A, 100% duty cycle 280 A, 100% duty cycle 13N .020 –1/8 in. (0.5 – 3.2 mm) Three-piece

3
 Maxstar 280 Control Panel
®

7
1
8

2 9
3
4
10
5
11

12
6

13

1. Standby Switch 7. Memory Card Port

2. Voltmeter Display 8. Activity Indicator
3. Ammeter Display 9. Encoder Control
4. Output Contactor “On” Indicator 10. Menu Ranges
5. DC TIG (HF Start) Process Menu Parameters 11. DC TIG (Lift-Arc) Process Menu Parameters
Amperage 1– 280 A** Amperage 1–280 A**
Pulse* Off – 250 pps Pulse* Off–250 pps
Postflow Auto/Off – 50 seconds Postflow Auto/Off–50 seconds
6. DC Stick (Schedule 1) Process Menu Parameters 12. DC Stick (Schedule 2) Process Menu Parameters
Amperage 5 – 280 A Amperage 5–280 A
DIG* Off –100% DIG* Off–100%
13. Process Selector

*Pro-Set parameter selectable. **Amperage range is tungsten size dependent.

User Menu (Hold Menu button three seconds.) Tech Menu (Hold Menu button five seconds.)
DC TIG (HF Start) 1. Arc Time 0.0–9,999 hours
1. Tungsten Size = .020 –1/8 in. or .05 – 3.2 mm 0.0–59 minutes
2. Remote Trigger = STD/HOLD/OUTPUT ON 0–999,999 cycles
DC TIG (Lift-Arc) Resettable
1. Tungsten Size = .020 –1/8 in. or .05 – 3.2 mm 2. Error Log = Error event recorder
2. Remote Trigger = STD/HOLD/OUTPUT ON 3. Sleep Timer = 1/5/10/15/30/45MIN/1HR
4. Stick Stuc = OFF/ON
DC Stick (Schedule 1 and 2) 5. OCV = LOW/NORM
1. Hot Start = ON/OFF 6. Cooler Power = AUTO/OFF (only on Maxstar models with CPS )
2. Remote Trigger = OUTPUT ON/HOLD/STD 7. Machine Reset
8. Software Number
9. Serial Number

4
 Maxstar 280 DX Control Panel
®

7
1
8

2 9

10

11
5
6 12

1. Standby Switch 7. Memory Card Port

2. Voltmeter Display 8. Activity Indicator
3. Ammeter Display 9. Encoder Control
4. Process/ TIG: HF impulse, Lift-Arc 10. Amperage Button
Arc Starting Stick: Adaptive Hot Start 11. Gas/DIG
5. Output Control Standard remote, Preflow 0.0–25.0 seconds
2T trigger hold, Postflow Auto/Off–50 seconds
Output on DIG* Off–100%
6. Pulser Control 12. Sequencer Control
Pulses per Second* DC : 0.1 – 500 pps Initial Amps 1–280 A
Peak Time* 5 – 95% Initial Time 0.0–25.0 seconds
Background Amps* 5 – 95% Initial Slope 0.0–50.0 seconds
Weld Time 0.0–999 seconds
Final Slope 0.0–50.0 seconds
Final Amps 1–200 A
Final Time 0.0–25.0 seconds
*Pro-Set parameter selectable.

User Menu (Press Gas and Amperage buttons.) Tech Menu (Hold Gas and Amperage buttons five seconds.)
1. Tungsten Size = .020 –1/8 in./GEN or .05 – 3.2 mm 1. Arc Time 0.0–9,999 hours
2. Remote Trigger = 3T/4T/4TL/4TE/4Tm 0.0–59 minutes
3. Stick Hot Start = ON/OFF 0–999,999 cycles
Resettable
2. Error Log = Error event recorder
3. Sleep Timer = 1/5/10/15/30/45MIN/1HR
4. Stick Stuc = OFF/ON
5. OCV = LOW/NORM
6. Weld Timers = OFF/ON
7. Cooler Power = AUTO/ON/OFF (only on Maxstar models with CPS )
8. Locks = OFF/1– 4
9. Meter Display
10. External Pulse Control = OFF/ON
11. Machine Reset
12. Software Number
13. Serial Number

5
 Maxstar 280 Models/Packages
®

Build an Air-Cooled Package

Select desired stock number for each step.

907552 301311
Maxstar shown. kit shown.

Step 1 • Select Maxstar Step 2 • Select Contractor Kit

Maxstar 280 907552 Note: For models without the Cooler Power A-150 TIG Torch and RFCS-14 HD Foot Control 301309
Maxstar 280 with CPS 907538 Supply (CPS), the Coolmate 1.3 must A-150 TIG Torch with RCCS-14 Fingertip Control 301311
Maxstar 280 DX 907553 be powered through an external 120-volt A-200 TIG Torch with RFCS-14 HD Foot Control 301549
Maxstar 280 DX with CPS 907539 facility power. A-200 TIG Torch with RCCS-14 Fingertip Control 301550

Maxstar comes with adjustable shoulder strap, 8 ft. power cord (no plug) See page 7 for kit contents.
and two 50 mm Dinse-style connectors.

Build a Water-Cooled Package

Select desired stock number for each step.

907538002
Maxstar 280
TIGRunner® shown
with four bottles
of 043810
Low-Conductivity
Coolant.

301580 remote shown. 300990 kit shown.

Step 1 • Select Maxstar TIGRunner® and Coolant Step 2 • Select Remote Control Step 3 • Select Torch Kit

Maxstar 280 (with CPS) TIGRunner 907538002 Wireless Foot 301580 W-250 Kit 300185
Maxstar 280 DX (with CPS) TIGRunner 907539001 RFCS-14 HD Foot 194744 W-280 Kit 300990
& RCC-14 E/W Fingertip 151086 (recommended for 280 model)
Low-Conductivity Coolant 043810 RCCS-14 N/S Fingertip 043688 W-375 Kit 301268
(must be ordered in quantities of 4) RMS-14 Pushbutton 187208
RMLS-14 Momentary/Maintained 129337
RHC-14 Hand 242211020
Wireless Hand 301582

Maxstar TIGRunner comes with 8 ft. power cord (no plug), See page 7 for remote descriptions. See page 7 for kit contents.
Coolmate™ 1.3 and Small Runner™ cart.

6
 Genuine Miller Accessories ®

Protective Cover 301382 Weldcraft™ A-200 (WP-26) RFCS-14 HD Foot Control

Fits Dynasty 210/280 and Maxstar 280. TIG Torch 194744
WP-26-12-R (12 ft.) Maximum flexibility is accom-
Small Runner™ Cart 301318
WP-26-25-R (25 ft.) plished with a reconfigurable
Designed for Dynasty/Maxstar
200-amp air-cooled torch. cord that can exit the front,
210 and 280 with or without
Torch body gas valve back or either side of the pedal. Foot pedal
Coolmate 1.3 cooler. Cart features
models also available. provides remote current and contactor control.
single-cylinder rack, foot pedal
Note: A-200 (WP-26) torches require 195379 connector. Includes 20-foot (6 m) cord and 14-pin plug.
holder, two cable/torch holders,
and two TIG filler rod holders. Weldcraft™ A-250 RCC-14 Remote Contactor and
TIG Torch Current Control 151086
Coolmate 1.3
™
301525025 No valve East/west rotary-motion fingertip control
300972 120 V
301526025 With valve attaches to TIG torch using two hook-and-loop
1.3-gallon cooler designed to
250-amp air-cooled fasteners. Includes 26.5-foot (8 m) control cord
cool torches up to 280 amps.
two-piece torch with and 14-pin plug.
25-foot (7.6 m) cable.
Performance TIG Gloves RCCS-14 Remote Contactor and
Note: Two-piece torches
263346 Small Current Control 043688
require connector:
263347 Medium 042533 Dinse-style North/south rotary-motion fingertip control
263348 Large 191981 Tweco-style attaches to TIG torch using two hook-and-loop
263349 X-Large fasteners. Includes 26.5-foot (8 m) cord and
Completely unlined, goat grain Air-Cooled TIG Torch 14-pin plug.
leather with triple-padded palm. Connectors
195379 A-200 (WP-26) RMS-14 On/Off Control
Memory Cards 195378* All others 187208
50 mm Dinse-style for one-piece air-cooled torch. Momentary-contact switch for contactor
Memory Card Expansion control. Rubber-covered pushbutton dome
*A-80 (WP-24) torches require 24-5 connector.
301151 14-Pin Automation Expansion switch ideal for repetitive on-off applications.
Provides the ability to access common automation Includes 26.5-foot (8 m) cord and 14-pin plug.
functions through the 14-pin connection.
301152 14-Pin Modbus® Expansion RMLS-14 Switch 129337
Provides the ability to access basic and advanced Momentary- and maintained-
functions through the 14-pin connection. contact rocker switch for contactor control.
Push forward for maintained contact and
Memory Card (Blank) 301080 backward for momentary contact. Includes
A blank, commercially available memory card used 26.5-foot (8 m) cord and 14-pin plug.
for transferring software updates and expandable
features from your computer to the machine. Torch kit RHC-14 Hand Control
Water-Cooled Torch Kits 300990 shown. 242211020
300185 W-250 Miniature hand control for
TIG Torches, Kits and Connectors 300990 W-280 (recommended) remote current and contactor
301268 W-375 control. Dimensions: 4 x 4 x
Kit comes with Weldcraft™ 25-foot (7.6 m) 3.25 inches (102 x 102 x 83 mm). Includes
TIG torch with Dinse-style connector, torch 20-foot (6 m) cord and 14-pin plug.
cable cover, work clamp with 15-foot (4.6 m)
cable, flowmeter regulator with gas hose and Wireless Remote Hand Control
AK4GL gas lens torch accessory kit. 301582
Contractor kit For remote current and
301311 shown. Water-Cooled TIG Torch contactor control. Receiver
Contractor Kits Connector 195377 plugs directly into the 14-pin
301309 A-150 with RFCS-14 HD 50 mm Dinse-style with receptacle of Miller machine.
301311 A-150 with RCCS-14 water return line. For use with all Weldcraft™ 300-foot (91.4 m) operating range.
301549 A-200 with RFCS-14 HD water-cooled torches.
301550 A-200 with RCCS-14
All-in-one TIG/stick welding kit comes with Educational Materials
either a Weldcraft™ A-150 OR A-200 TIG torch, Remote Controls and Switches To order, please call Miller Literature at 866-931-9732
RFCS-14 HD foot control OR RCCS-14 fingertip Wireless Remote Foot or visit MillerWelds.com/resources/tools.
control, 200-amp stick electrode holder and Control 301580
300-amp work clamp with 15-foot (4.6 m) Gas Tungsten Arc Welding (TIG) Publication
For remote current and 250833
cables, flow gauge regulator with 12-foot (3.7 m) contactor control. Receiver
gas hose, gas hose coupler, AK2C torch plugs directly into the 14-pin Setup DVD 251116
accessory kit and TIG torch connector. receptacle of Miller machine. 90-foot (27.4 m) Video topics include tungsten selection, setup
operating range. menus, DC pulse, sequencer, balance and
frequency settings.

7
 Tungsten
Tungsten Amp Range 2% Ceriated (AC/DC) 2% Lanthanated (AC/DC)
1/16 in. (1.6 mm) 70 –150 A WC116X7 WL2116X7
3/32 in. (2.4 mm) 140 – 250 A WC332X7 WL2332X7
1/8 in. (3.2 mm) 225 – 400 A WC018X7 WL2018X7
5/32 in. (4.0 mm) 300 – 500 A WC532X7 WL2532X7

Ordering Information
Equipment and Options Stock No. Description Qty. Price

Maxstar 280
® 907552 Auto-Line 208 – 575 V, 50/60 Hz, CSA. 8 ft. power cord
™

Maxstar® 280 with CPS 907538 Auto-Line™ 208 – 575 V, 50/60 Hz, CSA. 8 ft. power cord
Maxstar® 280 DX 907553 Auto-Line™ 208 – 575 V, 50/60 Hz, CSA. 8 ft. power cord
Maxstar® 280 DX with CPS 907539 Auto-Line™ 208 – 575 V, 50/60 Hz, CSA. 8 ft. power cord
Maxstar 280 DX with CPS International
® 907539002 Auto-Line™ 208 – 575 V, 50/60 Hz, CE. 8 ft. power cord

Water-Cooled Packages
Maxstar® 280 (with CPS) TIGRunner® 907538002 Auto-Line™ 208 – 575 V, 50/60 Hz, CSA. 8 ft. power cord
(Torch kit, accessories and coolant sold separately.)
Maxstar® 280 DX (with CPS) TIGRunner® 907539001 Auto-Line™ 208 – 575 V, 50/60 Hz, CSA. 8 ft. power cord
(Torch kit, accessories and coolant sold separately.)

Accessories
Protective Cover 301382 For Dynasty 210/280 and Maxstar 280
Small Runner™ Cart 301318 For Dynasty/Maxstar 210 and 280 with or without Coolmate 1.3
Coolmate 1.3™ 300972 120 V, 60 Hz, CSA. Requires coolant
TIG Coolant (must be ordered in quantities of 4) 043810 1-gallon plastic bottle. Protects against freezing to
-37° Fahrenheit (-38°C) or boiling to 227° Fahrenheit (108°C)
TIG Gloves See page 7
Memory Cards See page 7

TIG Torches, Kits and Connectors

Air-Cooled Contractor Kits See page 7
Weldcraft™ A-150 (WP-17) TIG Torch WP-17-12-R 12 ft. (3.7 m) cable. Requires 195378 connector
WP-17-25-R 25 ft. (7.6 m) cable. Requires 195378 connector
Weldcraft™ A-200 (WP-26) TIG Torch WP-26-12-R 12 ft. (3.7 m) cable. Requires 195379 connector
WP-26-25-R 25 ft. (7.6 m) cable. Requires 195379 connector
Weldcraft™ A-250 TIG Torch 301525025 No valve. 25 ft. (7.6 m) cable
301525026 With valve. 25 ft. (7.6 m) cable
Air-Cooled TIG Torch Connectors 195379 Connects Weldcraft™ A-200 (WP-26) torch to Dinse-style connector
195378 Connects all air-cooled Weldcraft™ torches (except A-200) to
Dinse-style connector. A-80 (WP-24) torches require 24-5 connector
Water-Cooled Torch Kits See page 7
Water-Cooled TIG Torch Connector 195377 Connects Weldcraft™ water-cooled torches to Dinse-style connector
Tungsten See above

Remote Controls See page 7

Educational Materials See page 7

Date: Total Quoted Price:

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