Miller Electric 301 G Description Of Front Panel Controls, Engine Speed, Generator Power Output

6-2. Description Of Front Panel Controls

1 Process Switch

See Section 6-3for Process switch informa- tion.

2Voltage/Amperage Adjust Switch And Remote Receptacle

Use switch to select front panel or remote voltage/amperage control. For remote con- trol, place switch in Remote position and connect remote control to Remote recep- tacle RC4 (see Sections 5-8and 6-4).

3 V/A Control

Use control to select weld voltage or amperage. Control may be adjusted while welding.

.For maximum weld output (above 220 Amps), run unit at 3600 rpm. For weld output below 220 Amps, operate unit at 3000 or 3600 rpm.

With Process/Contactor switch in Stick or TIG setting, use control to adjust amperage. With Process/Contactor switch in Wire posi- tion, use control to adjust voltage. With V/A Adjust Switch in Remote position, control limits the remote amperage in Stick and TIG modes, but has no effect in MIG modes.

4 Engine Hour Meter

Use hour meter to help schedule routine maintenance (see Section 8-1).

5 Engine Choke Control

Use control to change engine air-fuel mix when starting engine. Pull control out when starting a cold engine. Push control in when engine starts.

.Do not run engine with Choke control partially on or spark plugs will foul.

6 Engine Control Switch

Use switch to start engine, stop engine, and select engine speed. (Use switch in com- bination with Speed Control switch to select engine speed.) In Run/Idle 3600/2400 RPM position, engine runs at 2400 rpm at no weld load, and 3600 rpm under weld load. In Run/ Idle 3000/1800 RPM position, engine runs at 1800 rpm at no weld load, and 3000 rpm under weld load. In either position, engine speed is determined by weld load and posi- tion of Speed Control switch (see item 7 and table below).

.Generator power is available at recep-

tacles RC1 and RC2 only at 1800 rpm. If generator is not locked at 1800 rpm,

engine speed increases in response to weld load and generator power output stops at receptacles RC1 and RC2. Generator power load does not affect engine speed.

7 Speed Control Switch

Use switch to control engine auto idle func- tion. Place switch in Generator Lock position when not welding to lock engine speed at 1800 rpm for generator power at 60 Hz ac re- ceptacles RC1 and RC2. (Generator power is always available at 60-120 Hz receptacle RC3.)

Place switch in Weld position to allow engine speeds to be determined by position of En- gine Control switch. The Speed Control switch is not needed at start-up.

To Start: pull out choke and turn Engine Control switch to Start position. Release switch and slowly push choke in when engine starts.

.If the engine does not start, let the

engine come to a complete stop before attempting restart.

To Stop: turn Engine Control switch to Off position.

Controlling Engine Speed And Weld/Generator Power Output

Engine Controls

Speed Control Switch In Generator Lock. Engine Control Switch in either Run/Idle position.

Speed Control Switch In Weld.

Engine Control Switch in 3600/2400 RPM.

Speed Control Switch In Weld.

Engine Control Switch in 3000/1800 RPM.

Engine Speed

1800 rpm (Power Speed)

Continuous

No Load: 2400 rpm (Idle Speed) Load: 3600 rpm (Weld Speed)

No Load: 1800 rpm (Idle Speed) Load: 3000 rpm (Weld Speed)

Generator Power

Output

5 kW/kVA Total From

All AC Receptacles

2.4kW/kVA at 60-120 Hz From AC Receptacle

RC3 Only

5 kW/kVA Total From

All AC Receptacles At 1800 rpm.

At 3000 rpm, Output Available Only At 2.4 kW/kVA 60-120 Hz AC Receptacle RC3

Weld Output

Welding Not Recommended

3600 rpm:

20 − 300 A

3000 rpm:

20 − 220 A

OM-4411 Page 23