Leister UNIROOF 300, Manual, Page: 21 / 59

21
• Wait until the device has cooled down.
• Check the
power cord (1) and plug for electrical and/or mechanical damage.
• Use a wire brush to clean the
welding nozzle (9)
.
• Pull the
hot-air blower lock lever (15),
lower the
hot-air blower (10)
and guide the
welding nozzle (9)
between the overlapping sheets up to the stop.
• The drive motor starts automatically as soon as the hot-air blower (10) is engaged.
• You can also start the device manually with the Drive On/Off button (30) .
• Guiding the device during the welding process
• Guide the hot-air welder by the
guide bar (22, 24)
or by the
carrying handle (5)
along the overlap and also
observe the position of the track guide roller (16).
• Avoid applying pressure to the guide bar (22, 24) during the welding process, since this may lead to welding
faults.
As soon as you have switched on the heating, you will see a
dynamic display of
the current air temperature with a progress bar (setpoint and actual values).
• Make sure that the welding temperature has been reached before commencing
work (the heating time is 3–5 minutes).
• Now carry out test welds in accordance with the welding instructions of the
material manufacturer and/or national standards or regulations and inspect the
results. Adjust the welding profile as required.
Use the Heating On/Off button (31) to switch off the heating, so the welding nozzle
(9) cools down.
This will trigger the cool-down mode.
• The blower switches off automatically after approx. 6 minutes.
• Now switch off the device with the
main switch (19) and disconnect the power
cord (1)
from the electrical network.
• After finishing welding, pull the hot-air blower lock lever (15), extend the hot-air blower (10) up to the stop
(this stops the drive motor) and swivel it upwards until it engages.
• Then swivel the
track guide roller (16)
upwards.
Start welding
Preparing for welding
7.2 Welding sequence
7.4 Switching off the device / Maintenance
7.3 Finishing welding