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INSTALLATION
IDEALARC® R3R 375-I, 500-I AND 600-I

A-1

INSTALLATION

FALLINGEQUIPMENT can cause
injury.
• Do not lift this machine using lift
bail if it is equipped with a heavy
•accessory such as trailer or gas cylinder.
• Lift only with equipment of adequate lifting
capacity.
• Be sure machine is stable when lifting.
The machine should be located in a clean, dry place
where there is free circulation of clean air,such that air
movement entering the front and exiting the back will
not be restricted. Dirt and dust that can be drawn into
the machine should be kept to a minimum. Failure to
observe these precautions can result in excessive
operating temperatures and nuisance shutdown 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 1340 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-I
shall not be slacked on top of an R3R 400-I, but an
R3R 400-I may be stacked on top of an R3R 500-I.

INPUT POWER CONNECTION

ELECTRIC SHOCK can kill.
• Have an electrician install and ser-
vice this equipment.
• Turnthe input power off at the fuse
box before working on equipment.
• Do not touch electrically hot parts.
Remove the rear access panel. Connect the three
phase input power to the three line terminals on the
input contactor, and the earth ground lead to the
ground stud marked with the symbol. Install the
reconnect panel for the proper input voltage per the
diagram pasted inside the access panel cover.

DUTY CYCLE

The maximum output rating of this welder is at a 35%
duty cycle. Duty cycle is based on a ten minute period.
Therefore,the welder can be operated at the maximum
rated output for 3.5 minutes out of every 10 minute
period without overheating.
Failure to follow these instructions can cause immedi-
ate failure of components within the machine.
When powering welder from a generator be sure to
turn off welder first, before generator is shut down,
in order to prevent damage to welder!
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OUTPUT CONNECTIONS

With the machine power switch off, the output leads
are connected to the Magnum™ Twist-Mate™ output
terminals marked “–” and “+”. They are located at the
lower right and lower left corners of the front panel.
Strain relief for the electrode and work cables is pro-
vided by routing the leads through the rectangular
holes in the base before the connections to the output
terminals are made. Twist-Mate Lead plugs must be
installed to the output cables before connections can
bemade to the power source. See S18737 instructions
included with the plugs.
Theommended output cable sizes can be found in the
Tablebelow.
WARNING
WARNING
CopperWire Size
Input Type75°C in Conduit SuperLag
R3R Volts Amps 3Input 1 Ground Fuse Size
Welder 50/60Hz Input Wires Wire inAmps
220 67 88 80
375-I 380 39 10 10 60
440 34 10 10 40
220 90 66125
500-I 380 52 8880
415-440 45 10 10 60
220 103 46150
600-I 380 60 8890
440 52 88 70
Machine Up to 100 ft. 100 to 150 ft. 150 to 200 ft. 200 to 250 ft.
Size (30 m) (30 – 46 m) (46– 61 m) (61 – 76 m)
375-I 1/0(54 mm2) 1/0(54 mm2) 2/0 (68 mm2) 3/0 (86 mm2)
500-I 2/0(68 mm2) 2/0(68 mm2) 3/0 (86 mm2) 4/0 (108 mm2)
600-I 2/0(68 mm2) 3/0(86 mm2) 3/0 (86 mm2) 4/0 (108 mm2)
CAUTION