Leister LHS 91 BASIC Instructions D'utilisation page 19

Operation
• Mount corresponding nozzle or reflector, if required.
• It must be ensured that the hot air can flow out freely, as otherwise the device can be damaged by
the excess heat building up (risk of fire !).
• ATTENTION: Comply with minimum air volume as per technical data.
• Switch on mains.
• Allow device to cool down after heating mode.
Operation LHS 91 BASIC
The temperature can only be influenced by the air volume supplied by the user.
ATTENTION: Do not fall below the minimum air volume (see technical data) !
Operation LHS 91 SYSTEM
1. Heating power infinitely adjustable with potentiometer for power setting (3).
NOTE: The switch (9) must be put on lower position.
or
2. Heating power infinitely adjustable via control connection (7) with interface (10).
NOTE: The switch (9) must be put on upper position.
• Heating element protection function
If there is a risk of the heating element overheating, the power supply to the heating element will be reduced.
• Device protection function
If there is a risk of the device overheating (too hot inlet air, excess heat reside, absence of air), the power supply
to the heating element will be interrupted and the working contact of the alarm relay (11) opened. This can op-
tionally be evaluated for fault detection.
• Actions when the device protection responds
– The device must be disconnected from the electrical power supply for 5 seconds so that it can be restarted.
– Check air supply.
– Check air volume.
– Check air flow.
– Reconnect device to the electrical power supply.
Changing the nozzle or reflector
Danger – can cause burns! Do not touch the heating element tube and nozzle while they are hot.
Allow the device to cool down before replacing the nozzle / reflector.
The device is not fitted with heating element and device protection !
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