Operating Modes - Bosch GHG 660 LCD Professional Manual Original

OBJ_BUCH-485-007.book Page 14 Tuesday, April 19, 2016 4:14 PM
14 | English
longed pressing of the air-flow control button continuously in-
creases or decreases the air flow until the button is released,
or the maximum or minimal air flow is reached.
As an example, reduce the air flow when the surrounding area
of a workpiece is not to be heated excessively or when a light
workpiece could be moved away by the air flow.
Setting the Temperature
The temperature can only be regulated in the hot-air stage .
To increase the temperature, press on the "+" of the temper-
ature-control button 9, to decrease the temperature, press on
the "–".
Briefly pressing the temperature-control button 9 at the re-
spective position increases or decreases the temperature by
10 °C. Prolonged pressing of the temperature-control button
continuously increases or decreases the temperature by
10 °C, until the button is released or the maximum or minimal
temperature is reached.
After a change to the temperature setting, the power tool re-
quires a short period to warm up or cool down the air flow.
During this period, the target temperature is indicated be-
tween the flashing arrows in the display 7. When the target
temperature is reached, the arrows go out and the display in-
dicates the actual temperature.
Activating/Deactivating the Button Lock ("LOC")
To prevent accidental changing of the air flow and tempera-
ture the function of buttons 6, 8, 9 and 10 can be locked
when in the hot-air stage. In the cool-air stage
can be changed even when the button lock is activated.
Activating the Button Lock:
Switch the power tool on while in the hot-air stage . Adjust
the air-flow and temperature settings to be locked.
Switch the power tool off.
Press and hold the save button 10 and switch the power tool
on again (in cool-air or hot-air stage). The display 7 will indi-
cate "OFF" for the deactivated button lock.
With the save button 10 still held, press one after the other:
– "+" on the temperature-control button 9,
– "+" on the air-flow control button 8,
– "–" on the temperature-control button 9,
– "–" on the air-flow control button 8.
The display indicates "ON". Release the save button 10.
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.
1 609 92A 2MR | (19.4.16)

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
workpiece or for drying paint. It is also suitable for cooling down
the power tool before placing it down or changing nozzles.
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
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-
selection button 6 until the number of the requested program
is indicated in the display 7.
The following four programs are preset in the condition of
delivery:
1 Deforming plastic tubing (e.g. LDPE) 250
2 Welding plastic (e.g. PVC)
3 Removing Varnish/
Softening Adhesives
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.
is suitable for cooling down a heated-up
to the hot-air stage
350
450
550
Bosch Power Tools