Bosch Professional GHG 20-60 Manual Original página 12

12 | English
Thumbwheel position
9
Thumbwheel position 1 is suitable for cooling down a heated
workpiece or for drying paint. It is also suitable for cooling
down the heat gun before switching it off or changing the at-
tachment nozzles.
Practical advice
Pull the mains plug out of the plug socket before car-
u
rying out any work on the heat gun.
Note: Do not position the nozzle (3) too close to the work-
piece that you are using the power tool on. The resulting air
blockage can lead to the heat gun overheating.
Removing the heat shield
When working in particularly tight spaces, you can remove
the heat shield (4) by turning it.
Caution: Nozzle is hot! Working without the heat shield
u
increases the risk of burns.
To remove or put on the heat shield (4), switch the heat gun
off and let it cool down.
To cool down faster, you can also let the heat gun run briefly
at the lowest temperature that can be set.
Turning off the heat gun
Put down the heat gun on the storage surfaces (1) to let it
cool down, or to keep both hands free to work.
Be especially careful when working with the turned-
u
off heat gun! The heat from the nozzle or the air flow can
cause burns.
Position the heat gun on an even, stable surface. Ensure that
it cannot tip over. Secure the cable outside your work area
so that it cannot knock down or pull down the heat gun.
Switch the heat gun off if not used for a sustained period of
time, and disconnect from the mains.
Example applications (see figures A–G)
Images of example applications can be found on the graphics
pages.
The distance between the nozzle and the workpiece de-
pends on the material you are working on (metal, plastic
etc.) and the intended working method.
The optimum temperature for each application can be de-
termined by a practical test.
Always test the amount of air and temperature first. Start at
a greater distance and a lower power setting. Then adjust
the distance and power setting according to requirements.
If you are unsure what material you are working on or what
effect the hot air might have on it, first test the effect on a
concealed area.
All example applications apart from "Stripping paint from
window frames" can be carried out without the use of ac-
cessories. However, using the recommended accessories
will simplify the work and considerably increase the quality
of the result.
You can use all nozzles that are available as accessories
from Bosch with this heat gun.
1 609 92A 73E | (13.12.2021)
Temperature in °C u
620–630
To cool down faster, you can also let the heat gun run briefly
at the lowest temperature that can be set.
Removing varnish/loosening adhesives (see figure A)
Fit the surface nozzle (6) (accessory). Briefly soften the var-
nish with hot air and remove it with a clean spatula. Long
heat exposure burns the varnish and makes removal more
difficult.
Many adhesives can be softened using heat. By heating ad-
hesives, you can break connections or remove excess adhes-
ive.
Stripping paint from window frames (see figure B)
u
You can remove the paint from profiled surfaces with a suit-
able spatula and brush it off with a soft wire brush.
Thawing frozen water pipes (see figure C)
u
Fit the angle nozzle (8) (accessory). Gradually heat the
frozen points of the pipe, starting at the outlet and moving
back towards the inlet.
Take great care when warming plastic pipes and pipe con-
nections to avoid causing damage.
Shaping plastic pipes (see figure D)
Fit the reflector nozzle (9) (accessory). Fill plastic pipes with
sand and seal them on both sides to prevent the pipe bend-
ing. Carefully and evenly heat the pipe by moving the tool
back and forth from one side to the other.
Welding plastic (see figure E)
Fit the reducing nozzle (12) and the welding shoe (11) (both
accessories). The workpiece requiring welding and the weld-
ing wire (10) (accessory) must be made from the same ma-
terial (e.g. both PVC). The seam must be clean and free from
grease.
Heat the point of the seam carefully until it becomes pliable.
Note that there is not a great difference in temperature
between pliable plastic and liquid plastic.
Apply the welding wire (10) and allow it to flow into the joint
to form an even bead.
Soft Soldering (see figure F)
For spot welding, fit the reducing nozzle (12); for welding
pipes, fit the reflector nozzle (9) (both accessories).
If you are using solder without flux, apply soldering grease or
paste to the solder joint. Heat the solder joint and apply the
solder. The solder must be melted by the temperature of the
workpiece.
Take care when changing the nozzle. Do not touch the
nozzle while it is hot. Let the heat gun cool down and
wear protective gloves during changeover. The heat
from the nozzle can cause burns.
The glass protection nozzle (7) (accessory) must be
used for this application. There is a risk that the glass
may break.
Before applying heat to the pipe, check it is in fact a
water pipe. Water pipes and gas pipes often look
identical from the outside. Gas pipes must under no cir-
cumstances be heated.
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