Bosch GHG 20-63 Professional Manual Original página 15

To make the power tool cool down quicker, you can also let it
run briefly on its lowest temperature setting.
Setting down the power tool
Set the power tool down on the storage surfaces (3) to leave
it to cool down or to keep both hands free to work with.
Take particular care when working in the vicinity of
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the power tool while it has been set aside. The heat
from the nozzle or the air flow can cause burns.
Position the power tool on an even, stable surface. Ensure
that it cannot tip over. Secure the cable outside of your
working area so that it cannot pull the power tool down or
cause it to flip over.
Switch the power tool off when not in use for a long period
and pull the mains plug out of the socket.
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.
Take care when changing the nozzle. Do not touch the
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nozzle while it is hot. Leave the power tool to cool
down before changing the nozzle, and wear protective
gloves when doing so. The heat from the nozzle can
cause burns.
To make the power tool cool down quicker, you can also let it
run briefly on its lowest temperature setting.
Removing varnish/loosening adhesives(see figure A)
Fit the surface nozzle (14) (accessory). Briefly soften the
varnish 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)
The glass protection nozzle (15) (accessory) must be
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used for this application. There is a risk that the glass
may break.
You can remove the paint from profiled surfaces with a suit-
able spatula and brush it off with a soft wire brush.
Bosch Power Tools
Thawing frozen water pipes (see figure C)
Before applying heat to the pipe, check it is in fact a
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water pipe. Water pipes and gas pipes often look
identical from the outside. Gas pipes must under no cir-
cumstances be heated.
Fit the angle nozzle (16) (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 (17) (accessory). Fill plastic pipes
with sand and seal them on both sides to prevent the pipe
bending. 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 (20) and the welding shoe (19) (both
accessories). The workpiece requiring welding and the weld-
ing wire (18) (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 (18) 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 (20); for welding
pipes, fit the reflector nozzle (17) (both accessories).
If you are using solder without flux, apply soldering grease or
paste to the solder joint. Depending on the material, heat the
solder joint for approx. 50 to 120 seconds. Apply the solder.
The solder must be melted by the temperature of the work-
piece.
If necessary, remove the flux after the solder joint has cooled
down.
Heat-shrinking (see figure G)
Fit the reflector nozzle (17) (accessory). Choose the dia-
meter of the heat shrink plastic tube (21) (accessory) suit-
able for the workpiece. Evenly heat the heat shrink plastic
tube until it fits closely against the workpiece.
Maintenance and Servicing
Maintenance and Cleaning
Pull the plug out of the socket before carrying out any
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work on the power tool.
To ensure safe and efficient operation, always keep
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the power tool and the ventilation slots clean.
In order to avoid safety hazards, if the power supply cord
needs to be replaced, this must be done by Bosch or by an
after-sales service centre that is authorised to repair Bosch
power tools.
English | 15
1 609 92A 4UE | (04.02.2019)