Instruction Manual

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Install the welder in a dry location where there is a free
circulation of air in through the front louvers and out the
back of the case. A location which minimizes the
amount of smoke and dirt drawn into the front louvers
reduces the chance of dirt accumulation that can block
air passages, causing overheating and nuisance shut-
down of the machine.
The Idealarc
®
R3R welders can be stacked three high
when the following precautions are observed:
1. Be sure the bottom machine is on a firm, level sur-
face suitable for the total weight {up to 1350 pounds
(608 Kg)} of the stacked machines.
2. Stack the machines with the fronts flush. Be certain
the pins on the top front corners of the lower
machines fit through the holes in the base rails of
the upper machines.
3. No unit heavier than the bottom unit should be
stacked on top of it. For example, an R3R-500 shall
not be stacked on top of an R3R-400, but an R3R-
400 may be stacked on top of an R3R-500.
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Transformer insulation class 155°(F)
IP21 enclosure protection
Dual or triple voltage (eg: 230/460, 220/380/440, etc.)
models are shipped connected for highest voltage. To
change the connection, see the wiring or connection
diagram pasted to the inside of the access panel in the
case back.
Be sure the voltage, phase and frequency of the input
power is as specified on the welder nameplate.
Have a qualified electrician remove the access panel in
the case back and connect the three phase AC power
to terminals L
1
, L
2
, L
3
of the input contactor in accor-
dance with the U. S. National Electrical Code, all local
codes, and the wiring diagram located inside the
machine.
The welder frame must be grounded. A stud marked
with the symbol located on the floor of the input
box is provided for this purpose. See the U.S. National
Electrical Code for details on proper grounding
methods.
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This welder is rated for 60% duty cycle. Duty cycle is
based on a ten minute period. Therefore, the welder
can be operated at nameplate rated output for 6 min-
utes of every 10 minute period without overheating.
An amber high temperature warning light provides a
visual indication of an over temperature condition.
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300 230 56.0 88 80
460 28.0 10 10 40
400 230 82.0 66 125
460 41.0 10 10 60
500 230 100.0 46 150
460 50.0 88 70
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