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Building Technologies Division Basic Documentation LME7... CC1P7105en
Infrastructure & Cities Sector 18 PME73.831… 29.11.2011
Legend
tw Waiting time t10
Specified time air pressure switch state message (timeout)
TSA Safety time t11
Opening time of actuator (timeout)
t1 Prepurge time t12
Closing time of actuator (timeout)
t3 Preignition time t22
2nd safety time
t3n Postignition time (P257 +0.3 seconds) td1
Test atmospheric pressure
t4 Interval: End of ignition safety time – fuel valve 2 ON td2
Test gas pressure
t5 Interval: Pilot valve OFF – release of load controller td3
Test space is filled
t8 Postpurge time td4
Test space evacuating
t9 Interval: Fuel valve 2 ON – pilot valve OFF
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
4)
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
5)
Minimum time td1 + td2 + td3 + td4 if: Parameter P241.00 = 1 (ON) and P234 (postpurge time) >0 (postpurging) and P241.01 = 1
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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