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Building Technologies Division
Basic Documentation LME7...
CC1P7105en
Infrastructure & Cities Sector
15 PME73.810...
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: Switching point fuel valve 2a (2nd stage) ON by actuator
Part 3: High-fire reached
Part 4: Request losf controller CLOSE
Part 5: Switching point fuel valve 2a (2nd stage) OFF by actuator
Part 6: Low-fire eached
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
Valve proving when…
parameter 241 = 1 after power ON lockout, or
parameter 234 (postpurge time) = 0 seconds
Part 2: Prepurge time with flame simulation test (2.1 seconds)
36
Closing time of actuator (timeout)
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
Opening time of actuator (timeout)
74
Part 1: Operation is ended, check if postpurging is programmed
Part 2: Postpurge time
Valve proving when…
parameter 241 = 1, and
parameter 234 (postpurge time) >0 seconds
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
*)
During the actuator’s running phases, the actuator’s feedback signal must fir
be OFF, then ON
*1
Valve proving when P241 = 1 after mains ON, lockout or P234 (postpurge
time) = 0 seconds
*2
Valve proving when P241 = 1 and P234 (postpurge time) >0 seconds
Key to phases