Bosch Professional GHG 20-60 Original Instructions Manual page 12

OBJ_BUCH-3230-001.book Page 12 Wednesday, December 6, 2017 10:10 AM
12 | English
Work Examples (see figures A–G)
The figures of the application examples can be found on the
graphics pages.
The distance between the nozzle and the workpiece depends
on the material you are working on (metal, plastic, etc.) and
the intended working method.
The optimum temperature for each application can be deter-
mined 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 ef-
fect the hot air gun might have on it, first test the effect on a
concealed area.
All application examples can be performed without accesso-
ries except for "Strip paint from window frames". 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)
Fit the surface nozzle 6 (accessories). Briefly soften the paint
with hot air and remove it with a clean spatula. Long heat ex-
posure burns the paint and makes removal more difficult.
Many adhesives become soft when heated. Heated adhesives
allow for bonds to be separated or excessive adhesive to be
removed.
Strip paint from window frames (see figure B)
 Use of the glass protection nozzle 7 (accessory) is
essential. Danger of glass breaking.
On profiled surfaces, varnish can be removed using an appro-
priately fitting spatula and brushed off with a soft wire brush.
Defrosting Water Pipes (see figure C)
 Before heating pipes, check to make sure that it is actu-
ally a water pipe. Water lines often do not differ in appear-
ance from gas lines. Gas lines are not to be heated under
any circumstances.
Place on the angle nozzle 8 (accessory). Heat the frozen zone
always from the outside to the middle.
Heat up plastic pipes as well as connections between pipe
pieces especially careful to prevent damage.
Shaping Plastic Tubing (see figure D)
Fit the reflector nozzle 9 (accessories). 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 Plastics (see figure E)
Mount the reduction nozzle 12 and the welding shoe 11 (both
accessories). The workpieces to be welded and the welding
rod 10 (accessory) must be of the same material (e.g. both of
PVC). The seam must be clean and grease-free.
1 609 92A 3Y1 | (6.12.17)
Carefully heat up the seam location until it becomes doughy.
Please note that the temperature difference between the
doughy and liquid state of plastic is low.
Feed in the welding rod 10 and allow it to run into the gap so
that a uniform bead is produced.
Soft Soldering (see figure F)
For point soldering, place on the reduction nozzle 12, for the
soldering of pipes/tubing, place on the reflector nozzle 9
(both accessories).
If solder without flux is used, apply soldering grease or paste
to the location to be soldered. Warm the location to be sol-
dered for 50–120 seconds depending on the material. Apply
the solder. The solder must melt from the workpiece temper-
ature. After the soldered location has cooled, remove the flux.
Shrinking (see figure G)
Fit the reflector nozzle 9 (accessories). Choose the diameter
of the heat shrink plastic tube 13 (accessories) suitable for
the workpiece. Evenly heat the heat shrink plastic tube until it
fits closely against the workpiece.
Maintenance and Service
Maintenance and Cleaning
 Before any work on the machine itself, pull the mains
plug.
 For safe and proper working, always keep the machine
and ventilation slots clean.
If the replacement of the supply cord is necessary, this has to
be done by Bosch or an authorized Bosch service agent in or-
der to avoid a safety hazard.
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. Exploded views and information on spare parts can al-
so be found under:
www.bosch-pt.com
Bosch's application service team will gladly answer questions
concerning our products and their accessories.
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.
Tel. Service: (0344) 7360109
E-Mail: boschservicecentre@bosch.com
Bosch Power Tools