Specific Features; Warning Notes - Siemens LEC1/8853 Manual

Specific Features

With respect to the
application
With respect to
mounting and
installation
With respect to
commissioning and
trouble shooting

Warning Notes

CC1N7761E
The construction, control program and adjustment facilities of the unit allow its almost
unlimited use in burner plants of any size and type of construction, be it expanding flame
or interrupted pilot burners, permanently operating or any other special burners.
-
Prepurge time adjustable between 8 and 63 s
-
Operation at option with or without post-purge
-
Fully automatic control of the air damper, with optional running time of the damper
actuator
-
Air pressure check can be combined with functional control of the air pressure monitor
prior to the start
-
Ignition at option: direct ignition, with pilot burner as well as with or without ignition spark
supervision
-
Pre-ignition time adjustable to «Long» (during the pre-purge time) or «Short» (3 s, e.g.
for forced draught gas burners)
-
1st and 2nd safety time adjustable between 0 and 9 s
-
Automatic test of flame safeguards and flame detectors during burner-off periods and
the purge times (with lockout if a faulty flame signals occurs)
-
Semi-automatic burner start and operation possible
-
Optional mounting location and position of the control unit
-
Large space for connection in terminal base
-
Additional 4 terminals each for earth and neutral conductors as well as 4 auxiliary
terminals
-
Continuous indication of the program sequence in the viewing window of the unit cover.
*
-
The motor of the switching mechanism can be switched off (simplifies burner
adjustment)
-
Cam shaft can be rotated by hand
-
Electric remote lockout reset facility
For adjustment instructions please refer to «Adjustment facilities at the unit»
* It is, however, also possible to program the unit by means of a changeover link (UL3) in
such a way that the programming mechanism does not stop in case of a lock-out, but
that it runs through to the end of the program. The only component that remains under
voltage during that time is a fan for the post-purge which is connected to terminal 17.
• •
In the area covered by DIN assembly and installation must comply with the
requirements of the VDE, especially with the DIN/VDE standards 0100 and 0722!
• •
The electrical wiring must be made in accordance with national and local
standards.
• •
LEC1... is a safety device! The loosening of the securing screws as well as any
changing of the factory setting must therefore be carried out by authorized
persons only!
• •
Check wiring carefully before putting the unit into operation!
• •
The LEC1 must be completely isolated from the mains before performing any
work on it!
• •
Check all safety functions when putting the unit into operation or after having
replaced any fuses!
• •
Ensure protection against contact at the unit and at all electrical connections by
appropriate mounting!
• •
Electromagnetic emissions must be checked from an application point of view!
•
Condensation and any influence of humidity must be avoided!
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