Warning Notes; Engineering Notes; Mounting Notes; Mechanical Design - Siemens LAE10 Quick Manual

Warning notes

Engineering notes

Mounting notes

Installation notes

Mechanical design

Special features
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To avoid injury to persons, damage to property or the environment, the
following warning notes should be observed!
It is not permitted to open, interfere with or modify the units!
• Before performing any wiring changes in the connection area of the LAE10 / LFE10,
the flame safeguard must be completely isolated from the mains supply!
• Check the wiring and all safety functions!
• Ensure that the drop out delay time of relay «d» does not exceed 50 ms (also refer
to «Connection examples»)!
• The relevant national safety regulations must be complied with!
• Locate the ignition and detector electrodes such that the ignition spark cannot arc
over to the detector electrode!
→ Risk of electric overloads
• Locate and adjust the flame detector such that only the flame to be supervised will
be detected
• Protect the UV cell adequately against UV radiation emitted by
– halogen lamps
– welding equipment
– special lamps
– ignition sparks
– high energy x-rays and gamma rays
• Installation and commissioning work may only be carried out by qualified staff!
• Observe the permissible lengths and shielding of the detector cables!
→ Refer to «Technical data»!
• Always run the ignition cables separate from the unit and other cables while
observing the greatest possible distances!
• Before putting the flame safeguard into operation, check the wiring carefully!
The LAE10 / LFE10 are of plug-in design and consist of power section, flame signal
amplifier, flame relay, an auxiliary relay for controlling the UV detector or the flame
simulation test, and a flame indication lamp located in the unit cover behind a viewing
window.
The electrical circuit is intrinsically safe in compliance with the relevant regulations
and - in connection with LEC1 burner controls - is tested in respect of proper
functioning each time the burner is started up.
The flame safeguards can be mounted in any position directly on the burner, in
control panels, or on the front of a panel.
There are two types of plug-in bases available, designed for cable entry from the front,
the side or below.
Two earth terminals provide looping facilities for the earth connections of other burner
plant components such as ignition transformers (the flame safeguards themselves are
double-insulated!).
The plug-in bases - like the housing - are made of impact-proof and heat-resistant
plastic.
For illustrations of the bases and other notes, refer to «Base versions» and
«Dimensions».
– LAE10:
Automatic light simulation test by increasing the sensitivity of the amplifier during
the burner off and purge times, as programmed by the LEC1 burner control
– LFE10:
Automatic testing of the UV detector by increasing the operating voltage of the UV
tube during the burner off and purge times, as programmed by the LEC1 burner
control
CC1N7781E June 01, 1999 Landis & Staefa Division