Starting Operation - Bosch GHG 660 LCD Professional Manual Original

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OBJ_BUCH-485-001.book Page 16 Wednesday, January 23, 2008 12:48 PM
16 | English
Operation

Starting Operation

Observe correct mains voltage! The voltage
of the power source must agree with the
voltage specified on the nameplate of the
machine. Power tools marked with 230 V can
also be operated with 220 V.
Switching On and Off
To switch on the power tool, push the On/Off
switch 3 to the position (see "Cool-air Stage",
page 17) or (see "Hot-air Stage", page 17).
In both positions, the power tool will start with
the previous set air-flow and temperature values.
To switch off, push the On/Off switch 3 to the
stop in position "0".
After working for a longer period at a high temper-
ature, operate the power tool for a short period in
the cool-air stage before switching off.
Thermal-protection shut-off: In case of overheat-
ing (e.g. due to air build-up), the power tool au-
tomatically shuts off the heating system, but the
blower will continue to run. When the power tool
has cooled down to the operating temperature,
the heating system is automatically switched on
again.
Regulating the Air flow
The air flow can be regulated with the air-flow
control button 8:
Minimal air flow
Maximum air flow
To increase the air flow, press on the "+" of the
air-flow control button 8, to decrease the air
flow, press on the " – ".
Briefly pressing the air-flow control button 8 at
the respective position increases or decreases
the air flow by one step. Prolonged pressing of
the air-flow control button continuously increas-
es or decreases the air flow until the button is re-
leased, or the maximum or minimal air flow is
reached.
As an example, reduce the air flow when the sur-
rounding area of a workpiece is not to be heated
excessively or when a light workpiece could be
moved away by the air flow.
1 609 929 L85 | (23.1.08)
Setting the Temperature
The temperature can only be regulated in the hot-
air stage .
To increase the temperature, press on the "+" of
the temperature-control button 9, to decrease
the temperature, press on the " – ".
Briefly pressing the temperature-control button 9
at the respective position increases or decreases
the temperature by 10 °C. Prolonged pressing of
the temperature-control button continuously in-
creases 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 requires a short period to warm up or
cool down the air flow. During this period, the
target temperature is indicated between the
flashing arrows in the display 7. When the target
temperature is reached, the arrows go out and
the display indicates the actual temperature.
Activating/Deactivating the Button Lock
("LOC")
To prevent accidental changing of the air flow
and temperature the function of buttons 6, 8, 9
and 10 can be locked when in the hot-air stage.
In the cool-air stage the air flow 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 set-
tings 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 indicate "OFF" for the deacti-
vated 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 but-
ton 10.
Bosch Power Tools