Bosch Professional GHG 20-63 Original Instructions Manual page 8

8 | English
Creation of Smoke During Initial Use
A coating protects the metal surfaces from corrosion ex-
works. This protective layer evaporates during initial use.
The heat gun may display discolourations on the nozzle (1)
due to the production process. These do not count as dam-
age; the functioning of the heat gun is not affected.
Switching On
Slide the on/off switch (4) upwards.
Thermal protection regulation: Upon overheating (e.g. due
to an air blockage or not enough air being supplied), the heat
gun switches off the heating automatically and the thermal
protection regulation symbol (6) appears on the display. The
blower, however, will continue to run. If the heat gun has
cooled down to operating temperature, the heating is auto-
matically switched on again.
Switching Off
Slide the on/off switch (4) downwards into the 0 position.
After a sustained period of work at a high temperat-
u
ure, let the heat gun cool down before switching off.
To do this, allow it to run on the lowest temperature
setting for a short while.
Regulating airflow
With the on/off switch (4), you can set the airflow to one of
several different levels:
Setting Switch position
Cooling stage
Work stage 1
Work stage 2
The specifications apply to a rated voltage [U] of 230 V. These spe-
cifications may vary at different voltages and in country-specific mod-
els.
Reduce the airflow, for instance, if the area surrounding a
workpiece cannot tolerate excessive heat or if a workpiece is
light enough that the airflow might move it.
Regulating temperature
In the cooling stage, the temperature is set at 50 °C. In both
work stages, the temperature can be regulated.
Upon switching from the cooling stage to one of the work
stages, the temperature set there most recently is recalled.
The set temperature is shown in the display (8).
To increase the temperature, press + on the (7) button; to
decrease the temperature, press −.
Briefly pressing the (7) button increases or decreases the
temperature by 10 °C. Pressing and holding down the button
continuously increases or decreases the temperature by
10 °C until the button is released or the maximum/minimum
temperature is reached.
The set target temperature is shown in the display for 3 s.
The actual temperature at the nozzle output is displayed and
the unit of measure for the temperature (5) flashes until the
target temperature is reached. The unit of measure for the
temperature stops flashing once the target temperature is
reached.
1 609 92A 52V | (05.10.2021)
When you reduce the temperature, it does not take
u
long for the heat gun to cool down.
The cooling stage is suitable for cooling down a heated work-
piece or for drying paint. It is likewise suitable for cooling
down the heat gun before turning off or replacing the attach-
ment 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 (1) 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 (2) 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 (2), 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 (3) to let it
cool down, or to keep both hands free to work.
l/min °C
Be especially careful when working with the turned-
u
150 50
off heat gun! The heat from the nozzle or the air flow can
cause burns.
150–300 50–630
Position the heat gun on an even, stable surface. Ensure that
300–500 50–630
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.
Bosch Power Tools