TOOLCRAFT ZD-8908 Bedienungsanleitung Seite 26

• Point the hot air jet from the nozzle to the position where you want to perform soldering. The distance should not be
too great (since the hot air can otherwise not heat up the solder sufficiently). A too-short distances must be avoided,
however, since there may otherwise be strong heating of the component.
• The solder should metal quickly at application of the hot air. If smoke rises up, this is the evaporating flux agent
inside the solder (core solder).
• Always put the hot-air nozzle into the holder during soldering breaks.
For this, see chapter 7. g). The hot-air soldering/desoldering system has special standby mode.
• Ensure that the workpiece has clean soldering contacts. Use only electronics solder. Acid-containing solder may
destroy the component.
• When soldering, heat up the soldering point with the hot air and supply solder at the same time. Take away the
solder from the soldering point; then remove the hot-air nozzle from the soldering point. Solder speedily to avoid
damage to the workpiece (e.g. lifted-off conductors, overheated elements, etc.).
• Let the soldering point cool off after soldering. Depending on the size of the soldering point, it may take approx. 1 - 2
seconds for the solder to cool off. Do not move the soldered-in part or cable during this time, since a "cold soldering
joint" will otherwise result. Such soldering joints will look matte-silver and offer neither good electrical contact nor
good mechanical attachment.
A proper soldering point, in contrast, is glossy similar to chrome.
• Check the solder points carefully. The air flow may cause small solder beads to result that will trigger short circuits.
The small distances of the electrical contacts in SMD components also permit undesired connections/short circuits.
• To end soldering, insert the hot-air nozzle into the holder. Then switch off the hot-air soldering/desoldering system
with the mains switch on the rear (switch position "O" = off).
The hot-air nozzle needs about 10 - 15 minutes to cool off entirely. Caution, danger of burns!
Before storing the hot air soldering/unsoldering system, it must be cooled off entirely! There is a danger of
fire if this is not observed!
i) Desoldering
Desoldering generally works the same as soldering.
If the component to be desoldered is defective (e.g. a large IC), you can point the nozzle right at the component rather
than its legs. For components that have connection legs on either side, desoldering is hardly possible otherwise.
When desoldering, always ensure that the conductor tracks are not heated for too long, since they may come free of
the carrier material otherwise.
j) Use as hot-air blower
The hot-air soldering/desoldering system can also be used to heat up suitable objects, e.g. to shrink shrink hoses.
Depending on the size of an object, the hot-air nozzle can be operated with or without the nozzle attached.
When heating, observe that no surrounding components/objects are damaged.
At improper handling or heating of unsuitable objects, there is a danger of fire/explosion!
Never point the hot air jet at your body either; danger of burns/injury!
Heating of objects may cause toxic or harmful gases. Therefore, always observe sufficient ventilation!
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