Siemens LME7 Series - Time Table and Settings for Program Sequence PME72.521

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Building Technologies Division Basic Documentation LME7... CC1P7105en
Infrastructure & Cities Sector 13 PME72.521... 29.11.2011
13.5 Time table and settings for program sequence PME72.521...
Type Times in seconds
PME72.521...
tw
TSA
max.
t1
min.
t3
min.
t3n
approx.
t4
min.
t8
min.
t10
approx.
t11
approx.
t12
approx.
1) 2) 3)
Requirement 2.5 3 30 6 2.5 9 15 15 300 300 --- --- ---
Factory setting --- --- --- --- --- --- --- --- --- --- --- --- ---
Max. 2.5 3 --- --- --- --- --- --- --- --- 1 0.45 0.45
Min. --- --- 30 6 --- 9 15 --- --- --- 0.3 0.3 ---
Step size --- --- --- --- --- --- --- --- --- --- --- --- ---
Legend
tw Waiting time t4 Interval: End of safety time – load controller release
TSA Safety time t8 Postpurge time
t1 Prepurge time t10 Specified time air pressure switch state message (timeout)
t3 Preignition time t11
Opening time of actuator (timeout)
t3n Postignition time t12
Closing time of actuator (timeout)
1) Response time to a change of signal by the air pressure switch (opens) and response time in the event of loss of flame
2) Response time to a change of signal by the inputs
(e.g. pressure switch-min)
3) Flame detection time