Siemens LME7 Series Basic Documentation page 91

15.4 Time table and settings for program sequence PME73.830...
Type
TSA
PME73.830... tw
max.
Requirement 2.5 3
Factory setting --- t3n+0.45 29.106+2.1
Max. 2.5 14 1237+2.1
Min. --- ---
Step size --- ---
Function parameter
1 Repetition in the event of loss of flame during operation
<2: None
= 2: 1 x
Valve proving
2
0: Inactive
1: Active
3 Valve proving
0: During prepurge time (t1)
1: During postpurge time (t8)
4 Valve proving
0: According to P241.01
1: During prepurge time (t1) and postpurge time (t8)
Actuator position during prepurge time (t1) and postpurge time (t8)
5
0: Purging in low-fire
1: Purging in high-fire
Legend
tw Waiting time
TSA Safety time
t1 Prepurge time
t3 Preignition time
t3n Postignition time (P257 +0.3 seconds)
t4 Interval: End of safety time (TSA) - fuel valve 1 (V1) ON
t5 Interval: Pilot valve (PV) OFF - load controller (LR) release
t8 Postpurge time
t9 Interval: Fuel valve 1 (V1) ON - pilot valve (PV) OFF
1) Reaction time at change of signal by air pressure switch contact (open of 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
4) Minimum time td1 + td2 + td3 + td4 if: Parameter P241.00 = 1 (ON), after main ON, with lockout, P234 (postpurge time (t8)) = 0 (postpurging) or P241.01 = 0
5) Minimum time td1 + td2 + td3 + td4 if: Parameter P241.00 = 1 (ON) and P234 (postpurge time (t8)) >0 (postpurging) and P241.01 = 1
Building Technologies
HVAC Products
t1
t3 t3n t4
P225
P226 P257 P230
4)
min. approx. min.
min.
30 6 2.5 9
6.174 2.205+0.3 9.408
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
t10
t11
t12
t22
td1
td2
td3
td4
Basisdokumentation LME7...
15 PME73.830A2
Times in seconds
t8
t5 t9
P234 t10
P232 P231
5) approx.
min. approx.
min.
8.5 15 3 15
8.82 19.404 2.646 13.818
74.97 1237 74.97 13.818
2.058 0 0 0
0.294 4.851 0.294 0.294
Factory setting
P240 0
P241.00 1
P241.01 1
P241.02 0
P515.00 1
Specified time air pressure switch (LP) state message (timeout)
Opening time of actuator (timeout)
Closing time of actuator (timeout)
2nd safety time (TSA2)
Test atmospheric pressure
Test gas pressure
Test space filling
Test space evacuating
t11 t12
P259 P260 t22 1) 2)
approx. approx.
300 300 t9+1 --- ---
300.762 300.762 --- --- ---
1237 1237 --- 1 0.45
0 0 --- 0.3 0.3
4.851 4.851 --- --- ---
td1 td3
3) td2 td4
min. max.
--- 10 3
--- 10.29 2.646
0.45 37.485 2.646
--- 1.029 0
--- 0.147 0.147
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CC1P7105de
24.09.2009