Working Advice - Bosch Professional GHG 500-2 Manual Original

OBJ_BUCH-1344-001.book Page 15 Tuesday, November 23, 2010 3:15 PM
After a change to the temperature setting, the
power tool requires a short period to warm up
or cool down the air flow. During this period, the
target temperature is indicated between the
flashing arrows in the display 7. When the target
temperature is reached, the arrows go out and
the display indicates the actual temperature.
When switching from the hot air steps II or III to
the cold air setting I, a short time is required un-
til the power tool has cooled to 50 °C. During
the cooling period, the actual temperature at
the nozzle outlet is indicated on the display 7.
The cold air setting I is suitable for cooling a
warmed workpiece or for drying of paint. It is
also suitable for cooling the power tool before
placing it down or when changing nozzles.

Working Advice

Before any work on the machine itself, pull
the mains plug.
Note: Do not apply the nozzle 1 too close to the
workpiece being worked. The hot air build-up
can lead to overheating of the power tool.
Removing the Heat Protection
The heat protection collar 2 can be removed
when working at particularly hard-to-reach loca-
tions.
Be careful of the hot nozzle! Increased dan-
ger of burning exists when working without
the heat protection collar.
To remove or mount the heat protection collar 2,
switch the power tool off and allow it to cool
down.
To speed up the cooling, the power tool can also
be operated for a short period with the lowest
adjustable temperature.
Turn the heat protection collar 2 in anticlock-
wise direction to remove and in clockwise direc-
tion to mount again.
Placing Down the Power Tool (see figure C)
To cool down the power tool or have both hands
free, place it down on the standing surface 3.
Be especially careful when working with the
placed down power tool! There is danger of
burning oneself on the hot nozzle or on the
hot air jet.
Bosch Power Tools
Work Examples
The illustrations of the work examples can be
found on the fold-out pages.
The temperature settings in the work examples
are reference values that can vary, depending on
the material characteristics. The distance be-
tween the nozzle and the workpiece depends on
the material to be worked.
The optimal temperature for the respective ap-
plication can be determined by practical testing.
Always start with a low temperature setting.
All application examples can be performed
without accessories except for "Removing
Varnish/Paint from Windows". However, the use
of recommended accessories simplifies the
work and significantly improves the quality of
the result.
Be careful when changing the nozzle! Do
not touch the hot nozzle. Allow the power
tool to cool down and wear protective
gloves while changing the nozzle. Danger of
burning oneself on the hot nozzle.
Removing Varnish/Softening Adhesives
(see figure A)
Mount the wide jet nozzle 8 (accessory). Briefly
soften the varnish applying hot air and remove it
using a sharp, clean scraper or putty knife.
Applying heat too long will burn the varnish,
making it more difficult to remove.
Many adhesives (e.g. of stickers) become soft
when heated. Heated adhesives allow for bonds
to be separated or excessive adhesive to be
removed.
Removing Varnish/Paint from Windows
(see figure B)
Use of the glass protection nozzle 9 (acces-
sory) is essential. Danger of glass breaking.
On profiled surfaces, varnish can be removed
using an appropriately fitting spatula and
brushed off with a soft wire brush.
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