Siemens LME7 Series Basic Documentation page 64

Key to phases
Building Technologies Division
Infrastructure & Cities Sector
Phase Function
number
LOC Lockout shutdown phase
OFF Standby, waiting for heat request
oP Part 1: Request load controller OPEN
Part 2: Modulation of fan motor speed toward high-fire
Part 3: High-fire reached
Part 4: Request load controller CLOSED
Part 5: Modulation of fan motor speed toward low-fire
Part 6: Low-fired reached
10 Settling time, fan motor standby speed
21 Safety valve ON, air pressure switch in no-load position
Check if POC is closed, fan motor speed is reduced to 0
22 Part 1: Fan motor ON
Part 2: Specified time air pressure switch
Message (timeout), stabilization of air pressure switch
24 Settling time, fan motor prepurge speed
30 Part 1: Prepurge time without flame simulation test
Part 2: Prepurge time with flame simulation test (2.1 seconds)
36 Speed settling time, fan motor ignition load speed
38 Preignition time
40 Postignition time, parameter 257 + 0.3 seconds
42 Flame detection
44 Interval: End of ignition safety time and release of load controller
72 Speed stabilization time, fan motor postpurge speed
74 Part 1: Operation is ended, check if postpurging is programmed
Part 2: Postpurge time
80 Test space is evacuated
81 Atmospheric pressure test
82 Test space is filled
83 Gas pressure test
90 Pressure switch-min open → safety shutdown
*1 Valve proving, if P241 = 1 after main ON, lockout or P234
(postpurge time) = 0 second
*2 Valve proving, if P241 = 1 and P234 (postpurge time) >0 second
Basic Documentation LME7...
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CC1P7105en
29.11.2011