Operating Modes; Working Advice - Bosch GHG 660 LCD Professional Manual Original

OBJ_BUCH-485-005.book Page 14 Monday, May 14, 2012 9:28 AM
14 | English
The button lock is now activated. The preset values for tem-
perature and air flow are indicated in the hot-air stage . After
pushing any button, "LOC" is indicated in the display and the
values cannot be changed.
Deactivating the Button Lock:
Switch the power tool off. Push and hold the save button 10
and switch the power tool on again. The display indicates
"ON" for the activated button lock. Push the temperature but-
ton 9 and the air-flow control button 8 in the same sequence
as when activating the button lock. The display indicates
"OFF" for the deactivated button lock.

Operating Modes

Cool-air Stage
The air flow can be regulated, the temperature
is set to 50 °C (cannot be regulated), and pro-
gramming operation is not possible.
The cool-air stage is suitable for cooling down a heated-up
workpiece or for drying paint. It is also suitable for cooling
down the power tool before placing it down or changing noz-
zles.
When changing from the hot-air stage with higher tempera-
tures, it will take a few moments until the power tool has
cooled down to 50 °C. During cooling down, the display 7 in-
dicates the actual temperature at the nozzle outlet.
When changing from the hot-air stage to the cool-air stage
, the current air-flow settings are taken over.
Hot-air Stage
The air flow and temperature can be regulated;
normal and programming operation are possi-
ble.
When changing from the cool-air stage
, the air flow, temperature and possibly the program are au-
tomatically adjusted according to the settings of the last hot-
air stage operation.
Programming Operation
In programming operation, it is possible to continuously store
the air-flow and temperature adjustments in four programs.
Each program allows for different air-flow and temperature
combinations.
In progamming operation, it is also possible to change the air
flow and temperature any time. When the changes are not
saved, they are lost after switching off or changing to a differ-
ent program.
To change to programming operation, press the program-se-
lection button 6 until the number of the requested program is
indicated in the display 7.
1 609 929 W90 | (14.5.12)
The following four programs are preset in the condition of de-
livery:
1 Deforming plastic tubing (e.g. LDPE)
2 Welding plastic (e.g. PVC)
3 Removing Varnish/Softening Adhesives 450
4 Soldering
To change a set program, switch to this program by pressing
the program-selection button 6. Set the requested air flow
and temperature with the air-flow control button 8 and the
temperature-control button 9.
As soon as the settings of a program have been changed, the
symbol flashes in the left top of the display. Once the re-
quested air flow and temperature are set, press the save but-
ton 10 until the
ues are now stored under the program number indicated in
the display.
Normal Operation
To switch from programming operation to normal operation,
press the program-selection button 6 as often as required un-
til no program number is indicated above the temperature in
the display. The air flow and temperature can be changed an-
ytime with the air-flow control button 8 and the temperature-
control button 9.
Under the following conditions, the values for air flow and
temperature set in normal operation will remain stored:
– When changing to programming operation,
– When changing to the cool-air stage,
– When switching the power tool off.
to the hot-air stage

Working Advice

Before any work on the machine itself, pull the mains
plug.
Note: Do not apply the nozzle 4 too close to the workpiece be-
ing worked. The hot air build-up can lead to overheating of the
power tool.
Removing the Heat Protection
The heat protection collar 5 can be removed when working at
particularly hard-to-reach locations.
Be careful of the hot nozzle! Increased danger of burning
exists when working without the heat protection collar.
To remove or mount the heat protection collar 5, switch the
power tool off and allow it to cool down.
To cool down the power tool more quickly, you can operate it
for a few moments in the cool-air stage.
Turn the heat protection collar 5 in anticlockwise direction to
remove and in clockwise direction to mount again.
250
350
550
symbol in the display goes out. The set val-
Bosch Power Tools