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B-3
OPERATION
B-3
CLASSIC 300G
AUXILIARY POWER
The AC auxiliary power, supplied as a standard, has a
rating of 3.0 kVA of 115/230 VAC (60 hertz).
With the 3.0 kVA, 115/230 VAC auxiliary power, one
115V duplex and one 230V duplex, grounding type
receptacle are provided. The circuit is protected with
circuit breakers.
The rating of 3.0 kVA permits a maximum continuous
current of 13 amps to be drawn from the 230 volt
duplex receptacle. Or a total of 26 amps can be drawn
from the 115 volt duplex receptacle. The 115 volt
duplex receptacle has a configuration which permits
20 amps to be drawn from either half. The total com-
bined load of all receptacles is not to exceed 3.0 kVA.
An optional power plug kit is available. When this kit is
specified, the customer is supplied with a plug for
each receptacle.
THROTTLE BODY DEICING SYSTEM
The welder has been designed to allow continuous
year-round operation. Engine coolant is channeled
through the Throttle Bottle Injector (TBI) housing to
prevent the build up of ice on the TBI throat around
the throttle plate. The electronic controller is pro-
grammed to automatically compensate for the build up
of ice on the throttle plate. There will be no noticeable
change in the operation of the welder should icing
develop. On start-up, there is a possibility for the
engine to overspeed ( to a maximum of 2000 RPM )
for up to 10 seconds after throttle body icing condi-
tions have occurred.The electronic governor will cor-
rect itself for the new operating conditions and normal
operation will resume.
CONTROL OF WELDING CURRENT
DO NOT TURN THE “CURRENT RANGE SELEC-
TOR” WHILE WELDING because the current may
arc between the contacts and damage the switch.
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The “Current Range Selector” provides five overlap-
ping current ranges. The “Fine Current Adjustment”
adjusts the current from minimum to maximum within
each range. Open circuit voltage is also controlled by
the “Fine Current Adjustment” permitting control of the
arc characteristics.
A high open circuit voltage setting provides the soft
“buttering” arc with best resistance to pop-outs pre-
ferred for most welding. To get this characteristic, set
the “Current Range Selector” to the lowest setting that
still provides the current you need and set the “Fine
Current Adjustment” near maximum. For example: to
obtain 175 amps and a soft arc, set the “Current
Range Selector” to the 190-120 position and then
adjust the “Fine Current Adjustment” for 175 amps.
When a forceful “digging” arc is required, usually for
vertical and overhead welding, use a higher “Current
Range Selector” setting and lower open circuit volt-
age. For example: to obtain 175 amps and a forceful
arc, set the “Current Range Selector” to the 240-160
position and the “Fine Current Adjustment” setting to
get 175 amps.
Some arc instability may be experienced with EXX10
electrodes when trying to operate with long arc tech-
niques at settings at the lower end of the open circuit
voltage range.
DO NOT attempt to set the “Current Range Selector”
between the five points designated on the nameplate.
------------------------------------------------------------------------
These switches have a spring loaded cam which
almost eliminates the possibility of setting this switch
between the designated points.
IDLER CONTROL OPERATION
The idle is controlled by the “Idler” toggle switch on
the welder control panel. The switch has two positions
as follows:
1. In the “High” position, and the engine goes
to high idle speed. The speed is controlled by the gov-
ernor.
2. In the “Auto” / position, the engine
operates as follows:
• When welding or drawing power for lights or tools
(approximately 100-150 watts minimum) from the
receptacles, the engine operates at high idle speed.
• When welding ceases or the power load is turned off,
a preset time delay of about 10 seconds starts. This
time delay cannot be adjusted.
• If the welding or power load is not re-started before
the
end of the time delay
the throttle body controller
reduces the engine to low idle speed.
CAUTION
CAUTION