Miller Electric Big Blue 251D Run-In Procedure Using Resistance Grid, Bank/grid, From flammables

10-3. Run-In Procedure Using Resistance Grid

		Y	Stop engine.
		Y Do not touch hot exhaust
			pipe, engine parts, or load
			bank/grid.
6		Y Keep exhaust and pipe away
			from flammables.
	2	Y Do not perform run-in
			procedure at less than 20
			volts weld output and do not
			exceed duty cycle or equip-
			ment damage may occur.
		1	Resistance Grid
		Use grid sized for generator rated
		output.
	1	Turn Off grid.
		2	Welding Generator
		Place A/V range switch in maxi-
		mum position, A/V control in mini-
		mum position, and Output Selector
		switch (if present) in either DC
		position.
		3	Weld Cables
		Connect grid to generator weld
		output terminals using proper size
		weld cables with correct connec-
		tors (polarity is not important).
		4	Voltmeter
		5	Clamp-On Ammeter
		Connect voltmeter and ammeter as
	5	shown, if not provided on generator.
3		Start engine and run for several
		minutes.

Set grid switches and then adjust generator A/V control so load equals rated voltage and current of the generator (see nameplate, rat-

4ing label, or the specifications sec- tion in this manual).

Check generator and meters after first five minutes then every fifteen

+minutes to be sure generator is loaded properly.

. Check oil level frequently dur- ing run-in; add oil if needed.

After one hour (minimum), place A/V control in minimum position, then shut down grid to remove load. Run engine several minutes at no load.

Y Stop engine and let cool.

6 Engine Exhaust Pipe

Repeat procedure if wetstacking is present.

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