Maintenance And Service - Bosch Professional GHG 18V-50 Manual Original

8 | English
Feedback via LED Event description
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.
You can work without accessories for all examples of work.
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.
Take care when changing the nozzle. Do not touch the
u
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.
Heat-shrinking (see figure A)
Fit the reflector nozzle (12) (accessory). Choose the dia-
meter of the heat shrink plastic tube (14) (accessory) suit-
able for the workpiece. Evenly heat the heat shrink plastic
tube until it fits closely against the workpiece.
Removing varnish/loosening adhesives (see figure B)
Fit the surface nozzle (10) (accessory). Briefly soften the
varnish with hot air and remove it with a clean spatula. Long
1 609 92A 6F6 | (27.08.2021)
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.
Thawing frozen water pipes (see figure C)
Before applying heat to the pipe, check it is in fact a
u
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 (11) (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.
Soft Soldering (see figure D)
Fit the reducing nozzle (13) (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.
If necessary, remove the flux after the solder joint has cooled
down.

Maintenance and Service

Maintenance and Cleaning
Remove the rechargeable battery from the heat gun
u
before carrying out any work on the air pump (e.g.
maintenance, tool change, etc.) as well as when trans-
porting and storing the heat gun.
Keep the heat gun and the ventilation slots clean in or-
u
der to work safely and well.
After-Sales Service and Application Service
Our after-sales service responds to your questions concern-
ing maintenance and repair of your product as well as spare
parts. You can find explosion drawings and information on
spare parts at: www.bosch-pt.com
The Bosch product use advice team will be happy to help you
with any questions about our products and their accessor-
ies.
In all correspondence and spare parts orders, please always
include the 10‑digit article number given on the nameplate
of the product.
Malaysia
Robert Bosch Sdn. Bhd.(220975-V) PT/SMY
No. 8A, Jalan 13/6
46200 Petaling Jaya
Selangor
Tel.: (03) 79663194
Toll-Free: 1800 880188
Fax: (03) 79583838
E-Mail: kiathoe.chong@my.bosch.com
www.bosch-pt.com.my
Bosch Power Tools