Maintenance And Service; Maintenance And Cleaning; After-Sales Service And Application Service - Bosch GHG 20-63 Professional Manual Original

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.
Take care when changing the nozzle. Do not touch the
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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.
To cool down faster, you can also let the heat gun run briefly
at the lowest temperature that can be set.
Removing varnish/loosening adhesives (see figure A)
Fit the surface nozzle (14) (accessory). Briefly soften the
varnish 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 (15) (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 (16) (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 (17) (accessory). Fill plastic pipes
with sand and seal them on both sides to prevent the pipe
bending. Carefully and evenly heat the pipe by moving the
tool back and forth from one side to the other.
Welding plastic (see figure E)
Fit the reducing nozzle (20) and the welding shoe (19) (both
accessories). The workpiece requiring welding and the weld-
ing wire (18) (accessory) must be made from the same ma-
Bosch Power Tools
terial (e.g. both PVC). The seam must be clean and free from
grease.
Heat the point of the seam carefully until it becomes pliable.
Note that there is not a great difference in temperature
between pliable plastic and liquid plastic.
Apply the welding wire (18) and allow it to flow into the joint
to form an even bead.
Soft Soldering (see figure F)
For spot welding, fit the reducing nozzle (20); for welding
pipes, fit the reflector nozzle (17) (both 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.
Heat-shrinking (see figure G)
Fit the reflector nozzle (17) (accessory). Choose the dia-
meter of the heat shrink plastic tube (21) (accessory) suit-
able 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 mains plug out of the plug socket before car-
u
rying out any work on the heat gun.
Keep the heat gun and the ventilation slots clean in or-
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der to work safely and well.
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 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.
Great Britain
Robert Bosch Ltd. (B.S.C.)
P.O. Box 98
Broadwater Park
North Orbital Road
Denham Uxbridge
UB 9 5HJ
At www.bosch-pt.co.uk you can order spare parts or arrange
the collection of a product in need of servicing or repair.
English | 15
1 609 92A 52W | (13.09.2021)