Miller Electric Big Blue 300 P - Manual (Page 52)

OM-4433 Page 48
10-3. Run-In Procedure Using Resistance Grid
S-0684
Y Stop engine.
Y Do not touch hot exhaust
pipe, engine parts, or load
bank/grid.
Y Keep exhaust and pipe away
from flammables.
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.
Turn Off grid.
2
Welding Generator
Place V/A control in minimum posi-
tion, 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
shown, if not provided on generator.
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-
ing 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.
1
3 5
+
4
2
6