Starting Operation; Practical Advice - Bosch GHG 18V-50 Professional Manual Original

12 | English
Operation

Starting operation

Remove the rechargeable battery before changing ac-
u
cessories or storing the heat gun. This safety measure
prevents the heat gun from being started accidentally.
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.
Selecting a Power Setting
With the output level setting (3) you can choose between
two different output levels. The LED worklight flashes briefly
while switching:
– Setting 300 °C
With this setting, you can, for instance, thaw water pipes
or process heat shrink plastic tubes. Upon switching on,
this temperature is reached in less than 6 s. With a fully
charged 8 Ah rechargeable battery, the runtime is up to
21 min.
– Setting 500 °C
With this setting, you can, for instance, remove paint or
soft-solder.
The specifications on heating-up time refer to measurements
at room temperature.
Switching On
To switch on, first press the unlocking switch (4) and then
the on/off switch (5). After starting, you can release the un-
locking switch (4). The unlocking switch (4) does not have
to be pressed again during operation.
Upon starting the heat gun, the LED worklight (6) switches
on and illuminates the work area.
Switching Off
To switch off the tool, release the on/off switch (5).
Switch off the heat gun at the rechargeable battery (9) to al-
low it to cool down.
Restart Protection
If the rechargeable battery (9) is removed from the heat gun
while in operation and the on/off switch (5) is still being held
down when it is reinserted, the restart protection will activ-
ate. The LED worklight (6) flashes and the heat gun does not
start.
Release the on/off switch (5) and switch the heat gun back
on as usual.
Overheat Protection for the Rechargeable Battery
If the rechargeable battery (9) gets too hot during operation,
the output is reduced. The LED worklight (6) flashes slowly
for as long as the on/off switch (5) is pressed.
If the heat gun continues to be operated and the temperat-
ure in the rechargeable battery increases further, the heat
gun will switch itself off.
1 609 92A 6F5 | (21.07.2021)
Reduced Output
The heat gun is compatible with all available 18 V Bosch Pro-
fessional rechargeable batteries.
When operating the heat gun with rechargeable batteries
smaller than the recommended 4 Ah, however, the heat gun
will not reach full power at the 500 °C setting (the temperat-
ure is not reached and the air volume is reduced). In order to
show that the heat gun is working only with reduced output,
the LED worklight (6) flashes slowly several times upon
switching on.
LED Displays
The LED worklight (6) is also used as an LED status indic-
ator.
Feedback via LED Event description
Brief flashing Temperature change
Flashing multiple times when Reduced output (use of re-
starting the heat gun chargeable battery < 4 Ah)
Flashing slowly for as long as Restart protection
the on/off switch (5) is
Overheat protection for the
pressed
rechargeable battery
Flashing quickly for as long Internal error
as the on/off switch (5) is
pressed
If there is a permanent internal error in the heat gun (the
heat gun does not start or switches off when it is already in
operation), please contact customer service.

Practical advice

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.
Example applications (see figures A–D)
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.
Bosch Power Tools