Anleitung_BT_GW_170_SPK1:_
6.1.3 Setting the gas delivery rate
The gas delivery rate can be infinitely adjusted on
the pressure reducer (Fig. 4/19). It is shown on the
pressure gage (Fig. 4/20) in liters per minute (l/min).
Recommended gas delivery rate in rooms with no
drafts: 5 – 15 l/min.
To set the gas flow rate, first release the clamp lever
(Fig. 26/K) on the wire feed unit to prevent
unnecessary wire wear (Fig. 5.4.3). Connecting to
the mains (see point 5.3), set the ON/OFF/Welding
current switch (Fig. 1/7) to setting 1 and press the
burner switch (Fig. 5/25) to start the gas flow. Now
set the required gas delivery rate on the pressure
reducer (Fig. 4/19).
Turn the rotary knob (Fig. 4/24) counter-clockwise:
Lower gas delivery rate
Turn the rotary knob (Fig. 4/24) clockwise:
Higher gas delivery rate
Secure the pressure roller spring (Fig. 26/K) to the
wire feed unit again.
6.2 Electrical connection
6.2.1 Mains connection
See point 5.3
6.2.2 Connecting the earth terminal (Fig. 1/10)
Connect the welding setʼs earth terminal (10) in the
immediate vicinity of the welding position if possible.
Ensure that the contact point is bare metal.
6.3 Welding
When all the electrical connections for the power
supply and welding current circuit have been made
and the shielding gas has also been connected, you
can proceed as follows:
The workpieces for welding must be clear of paint,
metallic coatings, dirt, rust, grease and moisture in
the area where they are to be welded.
Set the welding current, wire feed and gas flow rate
(see 6.1.1 – 6.1.3) as required.
Hold the welding screen (Fig. 3/17) in front of your
face and move the gas nozzle to the point on the
workpiece where you wish to complete the weld.
Now press the burner switch (Fig. 5/25).
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When the arc is burning, the welding set will feed
wire into the weld pool. When the weld nugget is
large enough, move the burner slowly along the
required edge. Move it to and fro if necessary to
enlarge the weld pool a little.
Find the ideal setting of the welding current, wire
feed speed and gas delivery rate by carrying out a
test weld. Ideally an even welding noise will be
audible. The penetration depth should be as deep as
possible, but the weld pool must not be allowed to
fall through the workpiece.
6.4 Safety equipment
6.4.1 Thermostat
The welding set is fitted with an overheating guard
that protects the welding transformer from
overheating. If the overheating guard trips, the
control lamp (3) on your set will be lit. Allow the
welding set to cool for a time.
7. Cleaning, maintenance and ordering
of spare parts
Always pull out the mains power plug before starting
any cleaning work.
7.1 Cleaning
Keep all safety devices, air vents and the motor
housing free of dirt and dust as far as possible.
Wipe the equipment with a clean cloth or blow it
with compressed air at low pressure.
We recommend that you clean the device
immediately each time you have finished using it.
Clean the equipment regularly with a moist cloth
and some soft soap. Do not use cleaning agents
or solvents; these could attack the plastic parts
of the equipment. Ensure that no water can seep
into the device.
7.2 Maintenance
There are no parts inside the equipment which
require additional maintenance.
GB
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