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EN 676 (Nov 2003)
Air supply failure – fan speed
-- during pre purging
Air supply failure – fan speed
– during ignition
Air supply failure – fan speed
– in operation
Air flow rate during prepurging
under the demanded value – air
pressure switch
Fault during establishment of
flame
Loss of flame during operation
536/617
Building Technologies Division
6.35.4
Burner capacities
Air flow failure during prepurge shall at least proceed to safety shutdown.
Safety shutdown followed by a single attempt at restart is permitted.
If this restart attempt fails, then non-volatile lock-out shall occur.
Safety shutdown followed by a single attempt at restart is permitted.
If this restart attempt fails, then non-volatile lockout shall occur.
Safety shutdown followed by a single attempt at restart is permitted.
If this restart attempt fails, then non-volatile lockout shall occur.
Safety shutdown
or
the prepurge shall be continued until the required air rate is restored,
provided that the total controlled prepurge time is not reduced.
Maximum 3 restart attempts, whereby each restart calls for the complete start program.
After this action, the flame signal must be available at the end of the first safety time of the restart
attempt permitted last.
If not, the system must respond immediately by triggering safety shutdown, followed by non-volatile
lockout (reached by setting the repetition counter to 4).
For the restart, a value other than the forced prepurge time (T_ZWANG) can be set via the prepurge
time (T_VOR).
or
Immediately safety shutdown followed by non-volatile lock-out (reached by setting the repetition
counter to 1).
Restart with full startup sequence.
After this action, the flame signal must be available after the permitted restart attempt when the
burner reaches its operating position.
If not, the system must respond immediately by triggering safety shutdown, followed by non-volatile
lockout (reached by setting the repetition counter to 4).
For the restart, a value other than the forced prepurge time (T_ZWANG) can be set via the prepurge
time (T_VOR)
or
Immediately safety shutdown followed by non-volatile lock-out (reached by setting the repetition
counter to 1).
Standard: DIN EN 483 (June 2000) <= 70 kW; EN 297; EN 298; DIN EN 656 (January 2000) >70 kW ...
< 300 kW; DIN EN 13836:2006(D) >300 kW ... 1000 kW; DIN EN 15417:2006 >70 kW ... <= 1000 kW;
DIN EN 15420 (DRAFT):2006 >70 kW ... <= 1000 kW
User Manual LMS14...
6 The settings in detail
120 kW
>120 kW
Non-volatile lockout
Non-volatile lockout
Non-volatile lockout
CC1U7471en
28.01.2015
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