Miller Big Blue 251D User Manual Page 2

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Welding
Mode
CC/DC
CV/DC
CC/AC*
Battery*
Charge
Jump-Start
Weld Output Rated at 104˚ F (40˚ C)
NEMA Amperage and Voltage
600 A at 44 V (26.4 kW), 40% Duty Cycle
550 A at 42 V (23.1 kW), 60% Duty Cycle
500 A at 40 V (20 kW), 100% Duty Cycle
500 A at 40 V (20 kW), 100% Duty Cycle
400 A at 36 V (14.4 kW) 100% Duty Cycle
750 A, 12 V, Jump-Start
750 A, 24 V, Jump-Start
Weld
Output
Range
20 750 A
14 40 V
20 575 A
12/24 V
Max. Open-
Circuit
Voltage
95
56
64
14/28
*Deluxe model only. **Additional 7 in. (178 mm) to top of exhaust. ***Additional 190 lb. (86 kg) when fuel tank is full.
Compressor
Brand
Ingersoll Rand
CE55 G1
Free Air Delivery
at 1850 RPM
60 CFM
(1.70 m
3
/min.)
Free Air Delivery
at 1235 RPM (Idle)
40 CFM
(1.13 m
3
/min.)
Features
Rotary screw with electric clutch for on/off.
Oil change intervals of 500 hours (same as
engine). Life expectancy of 30,000 hours.
Working
Pressure
Constant
100 PSIG
(7 bar)
Duty
Cycle
100%
Oil
Capacity
5 qt. (4.7 L)
Automatic
Compressor
Shutdowns
Oil Temperature
7
8
9
18
19
20
21
22
7
23
International Model
1
2
10
11
12
13
4
3
5
6
15
16
17
14
2
Control Panel
Weight
(without fuel)***
Net: 1931 lb.
(876 kg)
Ship: 1982 lb.
(899 kg)
Deluxe Model
Net: 1956 lb.
(887 kg)
Ship: 2007 lb.
(910 kg)
Dimensions**
H: 43 in.
(1092 mm)
W: 28.5 in.
(724 mm)
D: 69.5 in.
(1765 mm)
Generator Output
Rated at 104˚ F (40˚ C)
Peak: 5500 watts
Continuous: 4000 watts, 34/17 A,
120/240 VAC, 60 Hz while welding
Additional Generator Power for
Deluxe Models (while NOT welding)
3-phase: 20 kW, 48 A, 240 VAC or
1-phase: 12 kW, 50 A, 120/240 VAC
Specifications
(Subject to change without notice.)
1. AC/DC Voltmeter*
2. AC/DC Ammeter*
3. Amperage Range Switch
4. Amperage/Voltage Adjust Control
5. Amperage/Voltage Adjust Switch
and Remote Amperage/Voltage
Adjust 14-Pin Receptacle
6. Process/Contactor
Selector Switch
7. 120 VAC, 20 A GFCI
Duplex Receptacle
8. 240 VAC, 30 A TwistLock
Receptacle (NEMA L6-30)
9. Air Outlet Valve 3/4-inch NPT
10. Engine Oil Pressure Gauge
11. Fuel Gauge displays engine
hours and oil change intervals
12. Engine Coolant Temperature Gauge
13. Battery Voltmeter
14. Air Compressor Pressure Gauge
15. Air Compressor On/Off Switch
16. Engine Control Switch
17. Starting Aid Switch*
18. 20 kW, 3-Phase Generator*
19. Strain Relief*
20. 50 A, 3-Phase Circuit Breaker*
21. 50 A, 1-Phase 120/240 V
Receptacle (NEMA 14-50)*
22. AC/DC/Battery Charge/
Jump-Start Switch*
23. International Model 240 VAC,
16 A Pin and Sleeve Receptacle
*On Select Models
Air Compressor
Meets NEMA and IEC output ratings.
Certified by Canadian Standards Association to both the Canadian and U.S. Standards.
Engine Brand
Deutz
TD2011L04o
Features
EPA Tier 4i compliant, turbocharged,
direct-injected, liquid-cooled (oil) engine.
Right-side service access with service intervals
of 500 hours for oil and filters. MSHA approved
with purchase of certificate from Deutz dealer.
Type
4-cylinder, industrial,
liquid-cooled diesel
Engine Speeds
Weld: 1850 RPM
Idle: 1250 RPM
HP
63.4
Capacities
Fuel: 25 gal. (95 L)
Oil: 11 qt. (10.4 L)
Coolant: Integrated oil
Automatic Engine
Shutdowns
Low Oil Pressure,
High Coolant
Temperature,
Low Fuel Level
Engine Specifications (Engine warranted separately by the engine manufacturer.)
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