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Introduction
The welding machine
LINC 406
enables welding:
SMAW
(MMA)
Recommended equipment, which can be bought by user,
was mentioned in the chapter "Accessories".
Installation and Operator Instructions
Read this entire section before installation or operation of
the machine.
Location and Environment
This machine will operate in harsh environments.
However, it is important that simple preventative
measures are followed to assure long life and reliable
operation:
Do not place or operate this machine on a surface with
an incline greater than 15° from horizontal.
Do not use this machine for pipe thawing.
This machine must be located where there is free
circulation of clean air without restrictions for air
movement to and from the air vents. Do not cover the
machine with paper, cloth or rags when switched on.
Dirt and dust that can be drawn into the machine
should be kept to a minimum.
This machine has a protection rating of IP23. Keep it
dry when possible and do not place it on wet ground
or in puddles.
Locate the machine away from radio controlled
machinery. Normal operation may adversely affect the
operation of nearby radio controlled machinery, which
may result in injury or equipment damage. Read the
section on electromagnetic compatibility in this
manual.
Do not operate in areas with an ambient temperature
greater than 40°C.
Duty cycle and Overheating
The duty cycle of a welding machine is the percentage of
time in a 10 minute cycle at which the welder can operate
the machine at rated welding current.
Example: 60% duty cycle:
Welding for 6 minutes
Break for 4 minutes
Excessive extension of the duty cycle will cause the
thermal protection circuit to activate.
The machine is protected from overheating by a
temperature sensor.
Input Supply Connection
WARNING
Only a qualified electrician can connect the welding
machine to the supply network. Installation the outlet plug
to power lead and connecting the welding machine had to
be made in accordance with the appropriate National
Electrical Code and local regulations.
Check the input voltage, phase, and frequency supplied to
this machine before turning it on. Verify the connection of
grounding wires from the machine to the input source.
The allowable input voltages are 3x220V 50/60Hz,
3x380V 50/60Hz and 3x440V 50/60Hz (3x380V: factory
default). For more information about input supply refer to
the technical specification section of this manual and to
the rating plate of the machine.
If it is necessary to change the input voltage:
The input cable must be disconnected from the mains
supply and the machine switched OFF.
Remove the top panel from the machine.
Reconnect X4, X5 or X7 according to the diagram
below:
X5
X7
220V
380V
440V
3x220V
X4
X5
X7
3x380V
220V
380V
440V
X4
3x440V
X5
X7
220V
380V
440V
X4
Figure 1.
Replace the top panel.
Make sure that the amount of mains power available from
the input supply is adequate for normal operation of the
machine. The necessary delayed fuse (or circuit breaker
with "D" characteristic) and cable sizes are indicated in
the technical specification section of this manual.
Output Connections
Refer to points [10], [11] and [12] of the Figures below.
