Specifications

6.2 Remote Models
Connect the gas cylinder to the regulator. Select correct shielding gas 1
for the application.
Insert the earth return lead connection into the front panel.2
Fit the wire spool to the machine. Select correct welding wire for 3
application.
Select the appropriate feed roller to suit the wire being used (refer to 4
page 18)
This machine comes complete with three types of wire feed rollers -
V groove for use with solid carbon manganese and stainless steels -
U groove for use with soft wires such as aluminium -
Knurled to be used with flux cored wires -
Loosen the wire feed tension screws and insert the wire. Re fit and 5
tension rollers ensuring the wire is gripped sufficiently so as not to
slip but avoid over tightening as this can affect feed quality and cause
wire feed components to wear rapidly.
Fit and tighten the torch on the output connection. Ensure correct 6
torch liner and contact tip are selected.
Polarity Selection. 7
For solid wire (DCEP).
Connect the inter-connection cable to the wire feed control and -
power sockets at the rear of the power source. Repeat this on the
wire feeder.
For select flux-cored wire and self-shielded wire (DCEN)
Connect the inter-connection cable wire feed control into the socket -
at the rear of the power source.
Fit the wire feed power cable into the front of the machine. -
Attach the earth cable to the rear of the machine. -
Primary current rating
These machines have a primary current (input) rating of 33 amps.
To obtain full rated output, they must be
a) connected to an approved plug and socket or
b) direct wired to an electrical circuit rated and protected for at
least 32 amps.
Consult an electrician for any additional wiring requirements.
Effective primary current
The effective primary current (I1Ef) based on the calculation from
AS60974.1 Welding power sources
Start-up Current
Due to the design of the welding power source, a high start up (inrush)
current will occur in the primary circuit when initially energised, in the
case of a MIG welder this happens when the torch trigger is pressed.
In some cases this inrush current can cause the electrical supply circuit
breaker to trip. The occurrence of this happening will vary depending on
the size and type of circuit breaker installed, and the output settings of
the welder. To overcome this problem, a “D” curve circuit breaker can be
installed which is designed to delay its tripping time to allow for the high
start-up current of motors and transformers. Consult an electrician for
more information on circuit breaker selection.
WARNING
All electrical work must be carried out by a qualified electrician.
Important Notice 275C and 275R
Both the 275C & 275R come fitted with a 15A plug and lead.
As stated on the label fitted to the lead, in order to obtain full rated
output an electrician must fit the larger input cable supplied with the
machine along with a 32 amp plug to an electrical circuit rated to at
least 32 amps.
20 BOC Smootharc Advance MIG 200C/275C/275R/350R Operating manual
Installation configuration of MIG 275R/350R