Maintenance And Service - Bosch Professional GHG 16-50 Original Instructions Manual

8 | English
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.
Removing varnish/loosening adhesives(see figure A)
Fit the surface nozzle (4) (accessory). Briefly soften the var-
nish 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 (5) (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.
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 (6) (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 (7) (accessory). Fill plastic pipes with
sand and seal them on both sides to prevent the pipe bend-
ing. Carefully and evenly heat the pipe by moving the tool
back and forth from one side to the other.
Soft Soldering (see figure E)
For spot welding, fit the reducing nozzle (8); for welding
pipes, fit the reflector nozzle (7) (both accessories).
1 609 92A 4UC | (14.03.2019)
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 F)
Fit the reflector nozzle (7) (accessory). Choose the diameter
of the heat shrink plastic tube (9) (accessory) suitable for
the workpiece. Evenly heat the heat shrink plastic tube until
it fits closely against the workpiece.

Maintenance and Service

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.
After-Sales Service and Application Service
Our after-sales service can answer questions concerning
product maintenance and repair, as well as spare parts. You
can find exploded 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 type plate of
the product.
Cambodia
Robert Bosch (Cambodia) Co., Ltd
Unit 8BC, GT Tower, 08th Floor, Street 169,
Czechoslovakia Blvd, Sangkat Veal Vong
Khan 7 Makara, Phnom Penh
VAT TIN: 100 169 511
Tel.: +855 23 900 685
Tel.: +855 23 900 660
www.bosch.com.kh
People's Republic of China
China Mainland
Bosch Power Tool (China) Co. Ltd.
Bosch Service Center
567, Bin Kang Road
Bin Kang District
Hangzhou, Zhejiang Province
China 310052
Tel.: (0571) 8887 5566 / 5588
Bosch Power Tools