Siemens LME7 Series Basic Documentation page 142

Legend
tw Waiting time
TSA Safety time
t1 Prepurge time
t3 Preignition time
t3n Postignition time (P257 +0.3 seconds)
t4 Interval: End of ignition safety time – fuel valve 2 ON
t5 Interval: Pilot valve OFF – release of load controller
t8 Postpurge time
t9 Interval: Fuel valve 2 ON – pilot valve OFF
Response time to a change of signal by the air pressure switch
1)
Response time to a change of signal by the inputs (e.g. pressure switch-min)
2)
Flame detection time
3)
Minimum time td1 + td2 + td3 + td4 if: Parameter P241.00 = 1 (ON), after power ON, with lockout, P234 (postpurge time) = 0 (postpurging) or P241.01 = 0
4)
Minimum time td1 + td2 + td3 + td4 if: Parameter P241.00 = 1 (ON) and P234 (postpurge time) >0 (postpurging) and P241.01 = 1
5)
P259.01 Actuator running time from ignition load to a position > low-fire
P259.02 Actuator running time from low-fire to a position > ignition load
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Infrastructure & Cities Sector
Specified time air pressure switch state message (timeout)
t10
Opening time of actuator (timeout)
t11
Closing time of actuator (timeout)
t12
2nd safety time
t22
Test atmospheric pressure
td1
Test gas pressure
td2
Test space is filled
td3
Test space evacuating
td4
( ) and response time in the event of loss of flame
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CC1P7105en
29.11.2011