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Building Technologies Division
Basic Documentation LME7...
CC1P7105en
Infrastructure & Cities Sector
11 PME71.402...
29.11.2011
Phase
number
Function
LOC
Lockout shutdown phase
OFF
Standby, waiting for heat request
oP1/oP:P1
Operation
10
Home run
21
Safety valve ON, air pressure switch in no-load position
Check if POC is closed
22
Part 1: Fan motor ON
Part 2: Specified time air pressure switch
Message (timeout), stabilization of air pressure switch
30
Part 1: Prepurge time without flame simulation test
Part 2: Prepurge time with flame simulation test (2.1 seconds)
38
Preignition time
40
Postignition time, parameter 257 + 0.3 seconds
42
Flame detection
44
Interval: End of ignition safety time and fuel valve 1 ON
50
Part 1: Interval: Fuel valve 1 ON and pilot valve OFF
Part 2: Response time
74
Postpurge time
90
Pressure switch-min open
→
safety shutdown
Key to phases