5
Connect the torch connector to the welding machine con-
nector
AE
.
Connect the torch gas hose fitting to the fitting
AD
on the
machine, and the gas hose from the cylinder pressure regu-
lator to the gas fitting
AN
on the rear panel.
DESCRIPTION OF EQUIPMENT (REAR PANEL).
AG
- 208/230 Selector Switch - used for selecting the input
supply voltage and for turning the machine on. “ON” is
towards the selected voltage. “OFF” is at the 12 o’clock
position.
AH
- Voltage Change Disc - to lock the selector switch in the
desired voltage position.
AI
- Fuse - 2Amp - 250Volt - slow blow.
AL
- Socket - for connecting the safety cable of the cooling
unit (TIG 250 H2O Only) TIG 250 GAS requires the installa-
tion of the TIG 250JP Jumper Plug.
AM
- Power Imput Cord.
AN
- Gas Inlet Fitting - This is where the gas hose from the
cylinder regulator attaches.
AO
- Socket - for Cooling Unit (230 Volts - max 400W). Do
NOT connect other power tools.
3.1 PRIMARY CIRCUIT CONNECTIONS
•
After final inspection, the welding machine is connec-
ted to the voltage indicated on the rear panel-230V
Factory pre-set.
• If you wish to change the supply voltage:
- Set the knob
AG
to the 12 o’clock position (machine OFF).
- Remove the knob
AG
of the selector switch by unscrewing
the holding screw.
- Position the voltage change disc
AH
so that the knob can only
turn towards the desired voltage, indicated on the rear panel.
- Insert the knob and lock it in place with the screw.
• Connect the power cord
AM
: the yellow-green wire of the
cord must be connected to an efficient grounding socket.
the remaining wires must be connected to the power supply
line through an isolator switch, located near the area if pos-
sible, to allow rapid shut-off in case of emergency.
The capacity of the overload cut-out switch or fuses instal-
led in a serial connection with the switch must be the same
as the current
l
1
absorbed by the machine.
The absorbed current
l
1
can be determined by reading the
technical specifications indicated on the machine, in regards
to the supply voltage
U
1
available.
Any extension cords must be sized appropriately for the
absorbed current
I
1
.
How to turn the machine on.
Use switch
AG
- turn switch towards the selected input vol-
tage (230V factory pre-set).
Do not touch live parts and output terminals while the machi-
ne is powered.
The first time the machine is turned on, select the mode
using the push-button
E
, and the welding parameters by
means of the key
P
and the knob
AA
as described in para-
graph 2.
The type and diameter of the electrode to be used must be
selected according to table A:
The flow of inert gas must be set to 30 CFH.
If you are using gas-lens type accessories, the gas through-
put may be reduced to approximately 15 CFH. The diameter
of the ceramic nozzle must be 4 to 6 times the diameter of
the electrode.
Use D.I.N. 10 protective glasses for up to 75A, and D.I.N. 11
from 75A up.
3.1.1 Connections for cooling unit.
AI
- Fuse 2A-250V slow blow.
AL
- Socket for connecting the safety cable of the cooling
unit.
AO
- Socket for cooling unit (230 Volts-max. 440 W).
Do not connect other power tools.
3.2 CHOOSING THE ELECTRODE DIAMETER FOR A
CORRECT ARC IGNITION EITHER IN DC OR IN AC (HOT
START).
To allow the setting up of the welding machine, a subme-
nu is available to adjust some parameters.
To enter the submenu, press at the same time for 3
seconds the keys
E
and
P
.
By means of the encoder
AA
, when selecting the wanted
electrode 0.040” - 1/16” - 3/32” - 1/8” - 5/32”, the auto-
matic Hot Start function is activated. To confirm the elec-
trode diameter, press and release the key
E
.
208 V
230 V
AG
AH
AI
AL
AM
AN
AO
Summary of Contents for TIG250
Page 6: ...6 ...
