75/248
Building Technologies Division
Basic documentation LMV36...
CC1P7544en
Infrastructure & Citiies Sector
7 Basic unit
25.09.2013
7.5.5.7. Program
stop
function
To simplify the burner settings in connection with commissioning and service work, the
program sequence of the LMV36... can be stopped at the following positions:
1) Air damper in prepurge position
24
2) Ignition position
36
3) Interval
1
44
4) Interval
2
52
The program stops are integrated in the setting sequence when the plant is
commissioned (refer to chapter
Air-fuel ratio curves – settings and commissioning
).
After the initial settings, program stops can be activated on the parameter level.
No. Parameter
208
Program stop
0 = inactive
1 = PrePurgP (Ph24)
2 = IgnitPos (Ph36)
3 = interval 1 (Ph44)
4 = interval 2 (Ph52)
The program stop function is maintained until manually deactivated. If the system halts
at one of the program stops, a message appears on the display of the AZL2....
Example:
C:204
alternating with
d:24
corresponding to program stop in prepurge
position.
Figure 41: Message in the case of program stop
7.5.5.8. Forced intermittent operation (<24 hours)
When forced intermittent operation is activated, the unit shuts down for a moment
after 23 hours and 45 minutes of uninterrupted operation, shutdown and followed by an
automatic restart.
Forced intermittent operation is a standard feature.
No. Parameter
239
Gas: Forced intermittent operation
0 = inactive
1 = active
279
Oil: Forced intermittent operation
0 = inactive
1 = active
339
Fuel 1 gas. Forced intermittent operation
0 = inactive
1 = active
379
Fuel 1 oil: Forced intermittent operation
0 = inactive
1 = active
7.5.5.9. Low-fire
shutdown
To prevent the boiler from being shut down under full or nearly full load conditions,
electronic air-fuel ratio control can run the burner to the low-fire position first when there
is no more request for heat (refer to chapter
End of operating position
).