Section 6 − operating the welding generator, 1. engine control switches – Miller Electric 250 User Manual
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A complete Parts List is available at www.MillerWelds.com
OM-217 455 Page 20
SECTION 6 − OPERATING THE WELDING GENERATOR
Ref. 228 647-A
1
4
6-1. Engine Control Switches
NOTICE − Disconnect equipment from auxil-
iary power receptacles during start−up and
shutdown. Some equipment can be damaged
by changes in frequency as engine rpms
change during start-up and shutdown.
1
Engine Control Switch
Use switch to start engine, select speed, and
stop engine. In Run/Idle position, engine runs
at idle speed at no load, and weld/power speed
under load. In Run position, engine runs at
weld/power speed.
.
Place switch in Run position to operate
most MIG equipment.
2
Glow Plug Switch
If necessary, push switch down before start-
up. See glow plug table for operating informa-
tion.
3
Idle Lock Switch
Use switch to lock engine in idle speed during
start-up. In Start position and Engine Control
switch in Run or Run/Idle, engine is locked in
idle speed. In Run/Idle position and Engine
Control switch in Run/Idle, engine runs at idle
speed at no load and weld/power speed under
load.
In Run/Idle position and Engine Control switch
in Run, engine runs at weld/power speed.
To Start: Use glow plug switch if necessary.
Turn Engine Control switch to Start position.
Release switch when engine starts.
.
If the engine does not start, let engine
come to a complete stop before attempt-
ing restart.
To Stop: Turn Engine Control switch to Off
position.
.
Close fuel valve to stop engine if Engine
Control switch does not work (see Section
4
Fuel Gauge/Maintenance Display
See insert from maintenance label.
3
t
0 seconds
10 seconds
20 seconds
Glow Plug Time
−4
°
F (−20
°
C)
32
°
F (0
°
C)
70
°
F (21
°
C)
Do not use glow plugs longer than
20 seconds.
Do not use ether to start engine.
Using ether voids warranty.
2