Siemens LME7 Series - Time Table and Settings for Program Sequence PME71.402

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Building Technologies Division Basic Documentation LME7... CC1P7105en
Infrastructure & Cities Sector 11 PME71.402... 29.11.2011
11.3 Time table and settings for program sequence PME71.402...
Type Times in seconds
PME71.402...
tw
TSA
max.
t1
P225
min.
t3
P226
min.
t3n
P257
approx.
t4
P230
min.
t8
P234
min.
t9
P231
approx.
t10
P224
approx.
t22
approx.
1) 2) 3)
Requirements 2.5 3 30 3 2.5 3 15 3 15 --- --- --- ---
Factory setting --- t3n+0.45 29.106+2.1 3.087 2.205+0.3 3.234 19.404 2.646 13.818 t9+1 --- --- ---
Max. 2.5 14 1237+2.1 37.485 13.23+0.3 74.97 1237 74.97 13.818 --- 1 0.45 0.45
Min. --- --- 0+2.1 1.029 0+0.3 3.234 0 0 0 --- 0.3 0.3 ---
Step size --- --- 4.851 0.147 0.147 0.294 4.851 0.294 0.294 --- --- --- ---
Function parameter Parameter number Factory setting
Continuous pilot
0: OFF
1: ON
P247 0
Repetition in the event of loss of flame during operation
<2: None
= 2: 1 x
P240 0
Legend
tw Waiting time t4 Interval: End of safety time – fuel valve 1 ON
TSA Safety time t8 Postpurge time
t1 Prepurge time t9 Interval: Fuel valve 1 ON and pilot valve OFF
t3 Preignition time t10 Specified time air pressure switch state message (timeout)
t3n Postignition time (P257 +0.3 seconds) t22 2
nd
safety time
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