Miller Electric OM-229 038D manual Installation, Specifications, Duty Cycle And Overheating

SECTION 3 − INSTALLATION

3-1. Specifications

					Max.	Rated Input Amperage
		Rated Output			Open	at Rated Output			Dimension	Weight
					Circuit
	100%		60%	20%		220/230 VAC 50Hz
Model					Voltage				(mm)	(kg)
221	90 A		116 A	210 A	41		32 A		480 x 800 x 1050	85 Net
	18.5 V		20.0 V	24.0 V			3 A*
Wire feed speed range 1.3 mpm to 20 mpm.
* While idling
					Max.	Rated Input Amperage
		Rated Output			Open	at Rated Output			Dimension	Weight
					Circuit
	100%		60%	35%		230 V		400 V
Model					Voltage				(mm)	(kg)
253	145 A		190 A	250 A	38	23 A		13 A	480 x 800 x 1050	85-103
	21.0 V		23.0 V	26.5 V		3 A*		1.38 A*		Net

Wire feed speed range 1.3 mpm to 20 mpm. * While idling

3-2. Duty Cycle And Overheating

Duty Cycle is percentage of 10 min- utes that unit can weld at rated load without overheating.

If unit overheats, thermostat(s) opens, output stops, and cooling fan runs. Wait fifteen minutes for unit to cool. Reduce amperage or voltage, or duty cycle before welding.

Y Exceeding duty cycle can damage unit and void warranty.

% DUTY CYCLE

60% Duty Cycle At 400 Amperes

100% Duty Cycle At 300 Amperes

6 Minutes Welding 4 Minutes Resting

Continuous Welding

Overheating

0	A or V
	15
	OR
Minutes	Reduce Duty Cycle
	sduty1 5/95 / 187 478-A

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