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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