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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

Siemens LME7 Series Basic Documentation

Other manuals for Siemens LME7 Series