Selco Quasar 320 SMC Classic, Instruction Manual

Page: 31 / 296

31
2.4 Installation
Connection for MMA welding
The connection shown in the figure produces
reverse polarity welding. To obtain straight polarity
welding, reserve the connection.
- Connect (1) the earth clamp to the negative socket (-) (2) of
the power source.
- Connect (3) the electrode holder to thpositive socket (+) (4)
of the power source.
Connection for MIG/MAG welding
- Connect the MIG/MAG torch to the central adapter (1),
ensuring that the fastening ring is fully tightened.
- Connect the red colored water pipe of the torch to the
inlet quick connector of the cooling unit (2).
- Connect the blue colored water pipe of the torch to the
outlet quick connector of the cooling unit (3).
- Check that the roller groove is consistent with the diameter of
the wire you wish to use.
- Unscrew the ring nut (4) from the spindle and insert the wire
spool.
Insert also the spool pin, insert the spool, reposition the ring
nut (4) and adjust the friction screw (5).
- Release the rolls lever of the wire feeder (6), sliding the end
of the wire into the wire guide bush and, passing it over the
roller, into the torch fitting. Lock the feed support in position,
checking that the wire has entered the roller groove.
- To load the wire onto the torch, press the wire feed push-
button.
- Connect the gas hose to the rear gas hose coupling.
- Adjust the gas flow from 5 to 20 l/min.
Welding polarity change
This device permits welding of any welding wire on the market
thanks to the easy selection of the welding polarity (direct or
reverse).
Reverse polarity: the power cable from the torch (7) must be
connected to the positive pole (+) of the terminal strip. The
power cable from the earth socket (8) must be connected to the
negative pole (-) of the terminal strip.
Direct polarity: the power cable from the torch (7) must be
connected to the negative pole (-) of the terminal strip. The
power cable from the earth socket (8) must be connected to the
positive pole (+) of the terminal strip.
Before shipment, the equipment is set for use with reverse
polarity!