BOSCH GHG 20-63 Professional Heat Gun Instruction Manual

: June 4, 2024
: Bosch

Table of Contents

Safety instructions
Product Description and Specifications
Technical Data
Operation
Practical advice
Maintenance and Service
References
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Download This Manual (PDF format)

Instruction Manual
GHG 20-63 Professional BOSCH GHG 20 63 Professional Heat
Gun

Original instruction

BOSCH GHG 20 63 Professional Heat Gun - fig

Safety instructions

** Read all the safety information and instructions. Failure to observe the safety information and follow instructions may result in electric shock, fire, and/or serious injury.
Save all warnings and instructions for future reference.
▶ This heat gun is not intended for use by children or persons with physical, sensory, or mental limitations or a lack of experience or knowledge. This heat gun can be used by children aged 8 or older and by persons who have physical, sensory, or mental limitations or a lack of experience or knowledge if a person responsible for their safety supervises them or has instructed them in the safe operation of the heat gun and they understand the associated dangers.**
Otherwise, there is a risk of operating errors and injury.

▶ Supervise children during use, cleaning, and maintenance. This will ensure that children do not play with the heat gun.
▶ Handle the heat gun with care. The heat gun produces intense heat which increases the risk of fire and explosion.
▶ Take particular care when working in the vicinity of flammable materials. The hot airflow or hot nozzle may ignite dust or gases.
▶ Do not work with the heat gun in potentially explosive areas.
▶ Do not aim the hot airflow at the same area for prolonged periods. Working with plastic, paint, varnish or similar materials may produce easily flammable gases.
▶ Please be aware that heat is directed to covered flammable materials, which may ignite.
▶ Safely place the heat gun on the storage surfaces after use and let it cool completely before packing it away. The hot nozzle can cause damage.
▶ Do not let children use the heat gun unsupervised when it is switched on.
▶ Store idle heat guns out of the reach of children. Do not allow persons unfamiliar with the heat gun or these instructions to operate the tool. Heat guns can be dangerous in the hands of untrained users.
▶ Do not expose the heat gun to rain or wet conditions. Water entering a heat gun increases the risk of electric shock.
▶ Do not misuse the cable, for example by using it to carry, hang up or unplug the heat gun. Keep the cable away from heat and oil. Damaged or entangled cords increase the risk of electric shock.
▶ Always wear safety goggles. Safety goggles reduce the risk of injury.
▶ Pull the plug out of the socket before adjusting the tool settings, changing accessories, or storing the heat gun. This safety measure prevents the heat gun from being started accidentally.
▶ Always check the heat gun, cable, and plug before use. Stop using the heat gun if you discover any damage.
Do not open the heat gun yourself, and have it repaired only by a qualified specialist using only original replacement parts. Damaged heat guns, cables, and plugs increase the risk of electric shock.

Keep your work area well-ventilated. The gas and steam produced during work are often harmful to one’s health.
▶ Wear protective gloves and do not touch the nozzle while it is hot. There is a risk of burns.
▶ Do not direct the airflow at persons or animals.
▶ Do not use the heat gun as a hair dryer. The outgoing airflow is considerably hotter than that of a hair dryer.
▶ Do not allow foreign objects to enter the heat gun.
▶ The distance between the nozzle and the workpiece depends on the material you are working on (metal, plastic, etc.) and the intended working method. Always test the amount of air and temperature first.
▶ If operating the heat gun in a damp environment is unavoidable, use a residual current device (RCD). The use of an RCD reduces the risk of electric shock.
▶ Never use the heat gun if the cable is damaged. Do not touch the damaged cable and pull out the mains plug if the cable is damaged while working. Damaged cables increase the risk of an electric shock.
Products sold in GB only:
Your product is fitted with a BS 1363/A approved electric plug with an internal fuse (ASTA approved to BS 1362).
If the plug is not suitable for your socket outlets, it should be cut off and an appropriate plug fitted in its place by an authorized customer service agent. The replacement plug should have the same fuse rating as the original plug. The severed plug must be disposed of to avoid a possible shock hazard and should never be inserted into the main socket elsewhere.

Product Description and Specifications

Please observe the illustrations at the beginning of this operating manual.
Intended Use
The heat gun is intended for deforming and welding plastic, removing coats of paint, and heating heat-shrink plastic tubes. It is also suitable for soldering and tinning, melting adhesive bonding, and thawing water pipes.
The heat gun is intended for handheld, supervised use.
Product Features
The numbering of the product features refers to the representation of the heat gun on the graphics page.

(1) Nozzle
(2) Heat shield, removable
(3) Storage surface
(4) On/off switch and power settings
(5) Unit of measurement for temperature
(6) Thermal protection regulation symbol
(7) +/– button
(8) Display| (9) Surface nozzle a)
(10) Glass protection nozzle a)
(11) Angle nozzle a)
(12) Reflector nozzle a)
(13) Welding wire a)
(14) Welding shoe a)
(15) Reducing nozzle a)
(16) Heat shrink plastic tube a)
---|---

a) Accessories shown or described are not included with the product as standard. You can find the complete selection of accessories in our accessories range.

Technical Data

Heat gun		GHG 20-63	GHG 20-63	GHG 20-63
Article number		3 601 BA6 2..	3 601 BA6 2D.
3 601 BA6 2G.	3 601 BA6 2C.
Rated power input	W	2000	1600	1500
Airflow	l/min	150/

150–300/
300–500| 100/
100–250/
200–350| 100/
100–250/
200–350
The temperature at the nozzle outlet A)| °C| 50–630| 50–630| 50–600
Temperature measurement accuracy| | | |
– at the nozzle outlet| | ±10 %| ±10 %| ±10 %
– on the display| | ±5 %| ±5 %| ±5 %
Operating temperature of display B)| °C| 0 to +50| 0 to +50| 0 to +50
Max. permissible ambient temperature in operation| °C| +40| +40| +40
Weight according to EPTA- procedure 01:2014| kg| 0.65| 0.65| 0.65
Protection class| | /II| /II| /II

A) At an ambient temperature of 20 °C
B) The display may go blank if outside the operating temperature.
The specifications apply to a rated voltage [U] of 230 V. These specifications may vary at different voltages and in country-specific models.

Noise/vibration information
Typically, the A-weighted sound pressure level of the heat of the gun is less than 70 dB(A).
Vibration total values ah (triax vector sum) and uncertainty K: ah < 2.5 m/s ² , K = 1.5 m/s ² .

Operation

Starting operation
▶ Pay attention to the mains voltage. The voltage of the electricity source must agree with the specifications on the type plate of the heat gun.

Creation of Smoke During Initial Use
A coating protects the metal surfaces from corrosion ex-works. This protective layer evaporates during initial use. The heat gun may display discolorations on the nozzle (1) due to the production process. These do not count as damage; the functioning of the heat gun is not affected.

Switching On
Slide the on/off switch (4) upwards.
Thermal protection regulation: Upon overheating (e.g. due to an air blockage or not enough air being supplied), the heat gun switches off the heating automatically and the thermal protection regulation symbol (6) appears on the display. The blower, however, will continue to run. If the heat gun has cooled down to operating temperature, the heating is automatically switched on again.

Switching Off
Slide the on/off switch (4) downwards into the 0 positions.
▶ After a sustained period of work at a high temperature, let the heat gun cool down before switching off.
To do this, allow it to run on the lowest temperature setting for a short while.
Regulating airflow
With the on/off switch (4), you can set the airflow to one of several different levels:

Setting	l/min	°C
Cooling stage	150	50
Work stage 1	150–300	50–630
Work stage 2	300–500	50–630

The specifications apply to a rated voltage [U] of 230 V. These specifications may vary at different voltages and in country-specific models.
Reduce the airflow, for instance, if the area surrounding a workpiece cannot tolerate excessive heat or if a workpiece is light enough that the airflow might move it.

Regulating temperature
In the cooling stage, the temperature is set at 50 °C. In both work stages, the temperature can be regulated.
Upon switching from the cooling stage to one of the work stages, the temperature set there most recently is recalled.
The set temperature is shown in the display ( 8).
To increase the temperature, press + on the (7) button; to decrease the temperature, press −.
Briefly pressing the (7) button increases or decreases the temperature by 10 °C. Pressing and holding down the button continuously increases or decreases the temperature by 10 °C until the button is released or the maximum/minimum temperature is reached.
The set target temperature is shown in the display for 3 s.
The actual temperature at the nozzle output is displayed and the unit of measure for the temperature ( 5) flashes until the target temperature is reached. The unit of measure for the temperature stops flashing once the target temperature is reached.

▶ When you reduce the temperature, it does not take long for the heat gun to cool down.
The cooling stage is suitable for cooling down a heated workpiece or for drying paint. It is likewise suitable for cooling down the heat gun before turning off or replacing the attachment nozzles.

Practical advice

▶ Pull the mains plug out of the plug socket before carrying out any work on the heat gun.
Note: Do not position the nozzle (1) too close to the workpiece 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 increases the risk of burns.
To remove or put on the heat shield (2), switch the heat gun off and let it cool down.
To cool down faster, you can also let the heat gun run briefly at the lowest temperature that can be set.

Turning off the heat gun
Put down the heat gun on the storage surfaces (3) to let it cool down, or to keep both hands free to work.
▶ Be especially careful when working with the turned-off heat gun! The heat from the nozzle or the airflow can cause burns.
Position the heat gun on an even, stable surface. Ensure that it cannot tip over. Secure the cable outside your work area so that it cannot knock down or pull down the heat gun.
Switch the heat gun off if not used for a sustained period of time, and disconnect from the mains.

Example applications (see figures A–G)
Images of example applications 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 determined 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 accessories. 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 nozzle while it is hot. Let the heat gun cool down and wear protective gloves during the 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 (9) (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 adhesives, you can break connections or remove excess adhesive.
Stripping paint from window frames (see figure B)
▶ The glass protection nozzle (10) (accessory) must be used for this application. There is a risk that the glass may break.
You can remove the paint from profiled surfaces with a suitable 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 water pipe. Water pipes and gas pipes often look identical from the outside. Gas pipes must under no circumstances 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 connections to avoid causing damage.
Shaping plastic pipes (see figure D)
Fit the reflector nozzle (12) (accessory). Fill plastic pipes with sand and seal them on both sides to prevent 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 (15) and the welding shoe (14) (both accessories). The workpiece requiring welding and the welding wire (13) (accessory) must be made from the same material (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 (13) 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 (15); for welding pipes, fit the reflector nozzle (12) (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 (12) (accessory). Choose the diameter of the heat shrink plastic tube (16) (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 mains plug out of the plug socket before carrying out any work on the heat gun.
▶ Keep the heat gun and the ventilation slots clean in order 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 center that is authorized to repair Bosch power tools.

After-Sales Service and Application Service
Our after-sales service responds to your questions concerning the 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 accessories.
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
You can find further service addresses at: www.bosch- pt.com/serviceaddresses
Disposal
The heat gun, accessories, and packaging should be sorted for environmentally friendly recycling.
Do not throw heat guns in the household waste!