Siemens LMS14 User Manual

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Building Technologies Division User Manual LMS14... CC1U7471en
6 The settings in detail 07.05.2014
The following graph shows the various phases of flue gas supervision:
Flue gas temperatuer B8
2474
2473
2478
Boiler output
= Pmin...Pmax
= Pmin...
PBegr = Pmin...Pmax
Pmin...
PBegr
= Pmin
= 0
= 0
2477
= Pmin...Pmax
T
B8
2454
T0
T1
T2 T3 T4
T5
T6 T7
t
7471d73e/0112
Figure 44: Flue gas supervision
Key
Line no. Meaning
2454 Switching diff on HCs Switch-on differential heating circuits
2473 Flue gas temp output red Flue gas temperature output reduction
2474 Flue gas temp swi-off limit Flue gas temperature switch-off limit
2476 Flue gas superv shutdown Flue gas supervision switch-off limit
2477 Flue gas superv st prev tme Flue gas supervision start prevention time
2478 Flue gas temp output limit Flue gas temperature output limitation
2479 Fl’g superv time con rel mod Filter time constant for falling flue gas temp.
8316 Flue gas temp Flue gas temperature
9541 Postpurge time TL max Postpurge time TL max
Pmax Maximum boiler output
PBegr Limited boiler output
Pmin Minimum boiler output
Limitation of output is triggered when:
Flue gas temperature  flue gas temperature output limitation.
Output reduction (limiting the burner’s output to low-fire) is triggered in the following
case:
Flue gas temperature  Flue gas temperature output reduction
Boiler shutdown is triggered when:
Flue gas temperature  flue gas temperature switch-off limit.
Output reduction or shutdown is canceled when:
Flue gas temperature < Flue gas temp output red (2473) – Switching diff on HCs (2454)

Siemens LMS14 Specifications

General

Brand	Siemens
Model	LMS14
Category	Control Unit
Language	English