Time Table And Settings For Program Sequence Pme71.401 - Siemens LME7 Series Basic Documentation

9.3 Time table and settings for program sequence PME71.401...

Type
TSA
PME71.401... tw
max.
Requirements 2.5 3
Factory setting --- t3n+0.45
Max. 2.5 14
Min. --- ---
Step size --- ---
Function parameter
1 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
1) Reaction time at change of signal by air pressure switch contact (open if air pressure switch (LP)) and response time in the event of loss of flame
2) Reaction time at change of signal by inputs (e.g. pressure switch-min (Pmin))
3) Flame detection time
Building Technologies
HVAC Products
Times in seconds
t1 t3 t3n
P225 P226 P257
min. min. approx.
30 2 2.5
29.106+2.1 2.058 2.205+0.3
1237+2.1 37.485 13.23+0.3
0+2.1 1.029 0+0.3
4.851 0.147 0.147
Basisdokumentation LME7...
9 PME71.401...
t4 t8 t10
P230 P234 P224 1)
min. min. approx.
8 0 15 ---
8.232 0 13.818 ---
74.97 1237 13.818 1 0.45
3.234 0 0 0.3 0.3
0.294 4.851 0.254 ---
Parameter number Factory setting
P240 0
t3n Postignition time (P257 +0.3 seconds)
t4 Interval: End of safety time (TSA) – load controller (LR) release
t8 Postpurge time
t10 Specified time air pressure switch (LP) state message (timeout)
2) 3)
--- ---
--- ---
0.45
---
--- ---
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CC1P7105de
24.09.2009