Bosch Power Tools 1944LCD Operating Instructions, OFF/COOL/HOT Selector Switch, Cool AIR Setting

BM 1619929572 11-06 11/8/06 8:51 AM Page 7

Operating Instructions

Your Bosch Heat Gun is a heavy-duty, industrial-quality, general-purpose heat gun. You can do more heating jobs faster with this heat gun because of its high power and air flow ratings.

This product provides a fast flow of heated air for applications such as activating adhesives, bending and forming plastics, curing epoxies, deburring plastics, defrosting frozen coils, drying negatives and parts, heating solids and liquids, loosening nuts and bolts, removing floor tiles and putty, repairing vinyl, shrinking tubing and packaging, softening materials and stripping paint.

The proper amount of heat for each application is dependent upon, the distance of the nozzle opening from the work surface and length of time that heat is applied to the work surface.

Before performing an application, we recommend that you experiment with a piece of scrap material. Use care in approaching the work until you find the proper combination of shutter adjustment, distance from the work surface and heat application time.

Use a gentle back and forth motion when applying heat unless it is found that a concentrated heat is desired.

OFF/COOL/HOT SELECTOR SWITCH

To turn unit on, slide the selector switch to the position (cool air setting) or (hot air setting.)

In both positions, the unit starts with the air flow and temperature values that were set before the last switch-off.

To turn unit off, slide the selector switch to the O stop position.

When working for long periods of time with high temperatures, allow the unit to cool down by running the unit in the cool air setting before turn the unit off (Fig. 1).

When heat gun is used in an enclosed container, such as a shrink tunnel or special enclosure, ambient air must be allowed to pass into the heat gun and there must be an outlet of equal size for the heated air to pass out of the enclosure also. Total enclosure will cause damage or possible failure to the heat gun due to the extreme heat generated.

COOL AIR SETTING

The air flow can be regulated, but the temperature is fixed at 120 °F (cannot be regulated), and no programmed operation is possible.

The cool air setting is suitable for cooling a warmed workpiece, or for drying of paint. It is also used for cooling the unit before placing down or the changing of nozzles.

When changing from the hot air setting with high temperatures to the cool air setting , a short period of cooling period is required until the unit cools down to 120 °C. During this cooling period, the actual temperature of the nozzle outlet is shown in the display (Fig. 1) .

When changing from the hot air setting to the cool air setting , the current air flow setting is used.

HOT AIR SETTING

The air flow and temperature can be regulated, normal and programmed operation is possible. For applications, see Typical Applications. When changing from the cold air setting to the hot air setting , air flow, temperature, operating mode and program revert back to the settings that were in use when the hot air setting was last used.

SETTING THE TEMPERATURE

The temperature in the hot air setting can be adjusted (Fig. 2).

To change to another temperature, the unit needs a short time to warm or cool the air stream to the target temperature. The target temperature is shown in the display during this

time with blinking arrows .

After reaching the required temperature, the

arrows are eliminated and the display shows the actual temperature.

The target temperature can be increased in steps of 10°F by pressing the “+” side of the temperature button or reduced by pressing the “–” side of the button. Brief pressing of the button increases or decreases the target temperature one time by 10°F. Longer pressing of the button increases or decreases the temperature continuously by 10°F steps until the button is released or the minimum or maximum temperature is reached.

-7-