Section 5 − Operation; Controls - Miller Spectrum 375 Owner's Manual

5-1. Controls

4
ON
OFF
Setting Gas/Air Pressure
1
20
24
16
27
1 Output Control
Use control to set cutting output.
Place control in Gas/Air Set position to safely
adjust gas/air pressure. Only gas/air circuit
is activated.
If 22-27 amperes of cutting output is used
with 115 VAC input power, and the overload
protection on the input power circuit fre-
quently opens, either reduce the cutting out-
OM-255 590 Page 18
.
A complete Parts List is available at www.MillerWelds.com
SECTION 5 − OPERATION
2 3
1
20
16
5
Requires
90-120 PSI
(621-827 kPa)
Supply
put and/or the cut time or find more adequate
power (see Section 4-1).
2 Trouble Lights (See Section 6-2)
3 Power Light
4 Power Switch
Setting Gas/Air Pressure
5 Air Filter/Regulator
6 Pressure Adjustment Knob
24
27
Set To
60 PSI (414 kPa)
6
Place Output control in Gas/Air position and
turn on gas/air supply. Lift knob and turn to
adjust pressure. Push knob down to lock in
setting.
Place Output control in desired cutting
output.
.
PRESSURE
60 PSI
20
16
At ambient temperatures below −55 C
(235 F), readjustment of
pressure regulator may be necessary.
Ref. 227 835-A / Ref. 804 486-B
5
6
24
27
gas/air