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2. Commissioning
Place the soldering tool in the holder. Insert compressed air hose with 6 mm outer diameter
in the quick action coupling for the compressed air connection (11). Provide supply of
compressed air with 600 kPa (87 psi) dry, oil-free compressed air. Plug the electrical lead
from the soldering tool in the 7 pole socket (7) on the front panel and lock. Position the main
filter (6) with the hose joint between the vacuum connection (8) and the vacuum connection
on the desoldering tool. Check that the mains voltage matches that on the rating plate and
that the mains switch (1) is in the off position. Plug the control unit into the mains (9). Switch
on the unit at the mains switch (1). When the unit is switched on, a self-test is performed
during which all the indicators (2) are illuminated.
The temperature set (required value) and the temperature scale (ºC/ºF) are then briefly
displayed. The electronics then switch automatically to the display of the actual value. The
red dot (5) on the display (2) illuminates. This dot serves as an optical regulation monitor.
Continuous illumination means that the system is heating up. Flashing indicates that the
operating temperature has been reached. The vacuum necessary for desoldering is activated
by the integrated finger switch on the soldering iron.
Setting the Temperature
Ordinarily the digital display (2) indicates the actual temperature. When the "Up" or "Down"
button (3) (4) is operated the digital display (2) switches to the display of the required value
currently set. The required value set (flashing display) can be changed in the corresponding
direction by repeatedly pressing or holding down the "Up" or "Down" button (3) (4). The
required value can be changed more quickly by holding the button down. Approx. 2 sec. after
releasing the button the digital display (2) switches automatically back to the actual value. It
is not possible to make changes to the setting on a locked soldering station (LOCK).
Maintenance
To obtain good soldering results it is important to regularly clean the desoldering head. This
includes emptying the tin collection container, replacing the glass tube filter, as well as checking
the seals. Correct sealing of the front face of the glass cylinder ensures full suction
performance. Dirty filters affect the flow of air through the soldering tool. The main filter (6)
(hose-mounted filter in the vacuum hose) should therefore be checked regularly and replaced
if necessary. Use a new original WELLER filter cartridge for this purpose. To clean the bore in
the suction nozzle and the suction tube, use the cleaning tool (51350099).
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Warning: Working without a filter will irreparably damage the compressed air converter.
Figure: Cleaning Tool, Cleaning and Replacing the Suction Nozzle see page 67.
3. Equipotential bonding
The various circuit elements of the 3.5 mm jack bush make 4 variations possible:
Hard-grounded:
No plug (delivery form)
Equipotential bonding:
With plug, equalizer at center contact (impedance 0 ohms)
Potential free:
With plug
Soft-grounded:
With plug and soldered resistance.
Grounding via set resistance value.
4. Notes on Use
Different suction nozzles provide solutions for a wide range of desoldering problems. The
suction nozzles can be changed easily; the necessary tool is integrated into the cleaning tool.
The thread on new suction nozzles should be treated with „anti-locking" compound. Only
change suction nozzles when hot. To avoid the suction nozzle thread seizing, the suction
nozzle should be unscrewed regularly and the thread treated with „anti-locking" compound.
It is important to use additional solder when desoldering. This ensures good suction nozzle
wetting properties and improves the flow characteristics of the old solder. Ensure that the
suction nozzle is perpendicular to the plane of the circuit board to achieve optimal suction
performance. The solder must be completely molten. During the desoldering process it is
important to move the component pin in a circular motion in the hole. If, after the desoldering
process, the solder is not completely removed, the solder joint should be retinned before
desoldering again. The selection of the right size of suction nozzle is important. As a rule of
thumb: the internal diameter of the suction nozzle should match the diameter of the hole in
the circuit board.
When heating the suction nozzle or soldering iron bit for the first time, wet with solder. This
removes oxide layers and impurities that have formed during storage. Always ensure that
the soldering iron bit or suction nozzle is well tinned during breaks in soldering and when
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