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A-2
INSTALLATION
INVERTEC DC TIG STARTER
A-2
PRODUCT DESCRIPTION
The purpose of the DC TIG Starter is to provide a high
frequency, high voltage pulse for arc starting in DC
TIG welding applications. It is intended to be used
with the Invertec™ power sources which have a 5.5
amp, 42 VAC auxiliary supply. The DC TIG Starter’s
output rating matches the Invertec V300’s (300
amperes DC at a 60% duty cycle and 250 amperes
DC at a 100% duty cycle). The input requirements are
42 VAC, 2.0 amps.
The DC TIG Starter is designed for non-contact start-
ing of DC TIG welding arcs. It can select between 2-
step and 4-step trigger functioning to control the
Invertec’s energizing of the torch. The DC TIG Starter
has a water solenoid to control the on/off flow of
coolant and a gas solenoid to control a preset preflow
and allow a variable postflow. Maximum current limit
can be adjusted for amptrol™ or arc start switch use.
The DC TIG Starter comes with a preset upslope and
an adjustable downslope. An Amphenol and control
switch are provided for simultaneous wire feeder con-
nection to Invertec power sources.
RECOMMENDED PROCESSES AND
EQUIPMENT
The DC TIG Starter is to be used with DC TIG welding
processes. A work cable, TIG torch, gas supply, and
an arc start switch are required. An optional amptrol
may be used. A water supply is required if using
water- cooled torches.
For best results, use of Thoriated Tungsten electrodes
is recommended.
COMPATIBLE LINCOLN ELECTRIC EQUIPMENT.
- V300’s with 5.5 amp 42 VAC auxiliary supply.
- V200’s with 5.5 amp 42 VAC auxiliary supply.
- Field installed options and accessories. See
ACCESSORIES section.
- Compatible with all Magnum™ one and two piece
water-cooled torches with 7/8 left-hand threads and
gas-cooled torches with 3/8, 5/8, and 7/8 right-hand
threads.
- Compatible with Magnum water coolers. The sole-
noid controlled coolant flow will help yield longer
Magnum cooler life.
INSTALLATION
ELECTRIC SHOCK can kill.
• Have an electrician install and service
this equipment.
• Turn the input power off at the fuse
box before working on equipment.
• Do not touch electrically hot parts.
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WARNING
Location
The DC TIG Starter kit has been designed with many
features to protect it from harsh environments. Even
so, it is important that simple preventative measures
are followed in order to assure long life and reliable
operation.
a. The machine must be located where there is free
circulation of clean air such that air movement in
the back and out the bottom will not be restricted.
Dirt and dust that can be drawn into the machine
should be kept to a minimum.
b. Keep machine dry. Shelter from rain and snow. Do
not place on wet ground or in puddles.
High Frequency Interference Protection
The DC TIG Starter employs a solid state non-contact
torch starting circuit which drastically reduces high fre-
quency emissions from the machine as compared with
spark gap type high frequency generators.
Radiated interference can develop, however, in the
following four ways:
a. Direct interference radiated from the machine;
b. Direct interference radiated from the welding leads;
c. Direct interference radiated from feedback into the
power lines;
or
d. Interference from reradiation or “pickup” by
ungrounded metallic objects.
Keeping these contributing factors in mind, installing
equipment per the following instructions should mini-
mize problems:
a. Keep the machine power supply lines as short as
possible.