Operating Guidelines; Accessories; Packing List; Nozzles - Weller WHA 900 Mode D'emploi

The Airflow and Temperature are activated after depressing
the Start/Stop Push Button. Heat-up time of the nozzle
depends primarily on the size of the nozzle and the air flow.
Temperature Offset
1. With the WHA 900 off and the heater cooled down. Place Measuring Nozzle (T0058736875) on to the end of the Hot Air
Pencil and fasten it with the set screw.
2. Insert the 0.5 mm Type "K" Thermocouple, (T0058736786) into the hole of the Measuring Nozzle and place the Hot Air
Pencil in the safety rest. Switch the device on.
3. Choose the temperature you want to adjust with the temperature knob.
4. Activate the unit with the Start / Stop push button. Set the Airflow Knob to 4. Wait approximately 5 minutes before
continuing.
5. Read the temperature value indicated on the measuring instrument.
6. If the temperature has to be corrected, depress and hold the Start / Stop push button for approximately 15 seconds while
the hot air is activated. The green LED (1) will light continuosly.
7. While the green LED (1) is continuosly lit, immediately turn the temperature knob slightly beyond center and rotate back to
the center position (550 °F). This will be your "zero" point for adjustments. Rotate clockwise for positive and
counterclockwise for negative adjustments.
8. Adjust the temperature knob until the desired setting is indicated on the measuring device and has stabilized. Depress the
Start / Stop push button to confirm.
9. The Temperature Offset function is now complete. You may adjust the temperature knob to your original setting.
10. Repeat steps 3-9 if additional Offset is required.

4. Operating guidelines

Changing the nozzles;
The hot air nozzles are fixed to the heating element with a
set/attachment screw. Loosen the set/attachment screw to
remove nozzles.

5. Accessories

For Nozzle range see " Hot Air Nozzles ".
T0051504899 - Multiple Rest for six nozzles.
T0051504999 - Nozzle Exchange Tool 2.5 mm Hex Wrench
T0051312099 - Foot switch, 1-stage
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Warning: Do not direct the hot air pencil at people or
inflammable objects.

6. Packing List

WHA 900 Control Unit
Power Cord
Safety Rest
(1) Set / Attachment Screw
Operating Instructions
Safety Information
Subject to technical change without notice!
See the updated operating instructions at
www.weller-tools.com.
English
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