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Building Technologies Division Basic Documentation LME7... CC1P7105en
Infrastructure & Cities Sector 13 PME72.521... 29.11.2011
Phase
number
Function
LOC Lockout shutdown phase
OFF Standby, waiting for heat request
oP:P1 Part 1: Request load controller OPEN
Part 2: Switching point fuel valve 2a (2nd stage) ON by actuator
Part 3: High-fire reached
Part 4: Request load controller CLOSE
Part 5: Switching point fuel valve 2a (2nd stage) OFF by actuator
Part 6: Low-fire reached
10 Actuator travels to the CLOSED position, home run
21 Safety valve ON, air pressure switch in no-load position
Check if POC is closed, actuator travels to the CLOSED position
22 Part 1: Fan motor ON
Part 2: Specified time air pressure switch
Message (timeout), stabilization of air pressure switch
24 Opening time of actuator (timeout)
30 Part 1: Prepurge time without flame simulation test
Part 2: Prepurge time with flame simulation test (2.1 seconds)
36 Closing time of actuator (timeout)
38 Preignition time
40 Postignition time
42 Flame detection
44 Interval: End of ignition safety time and release of load controller
72 Opening time of actuator (timeout)
74 Part 1: Operation is ended
Part 2: Postpurge time
90 Pressure switch-min open → safety shutdown
Key to phases
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