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Building Technologies Division
Basic Documentation LME7...
CC1P7105en
Infrastructure & Cities Sector
12 PME71.901...
29.11.2011
Phase
number
Function
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
Key to phases