Time Table And Settings For Program Sequence Pme71.402 - Siemens LME7 Series Basic Documentation

11.3 Time table and settings for program sequence PME71.402...

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