Siemens LME7 Series Basic Documentation page 134

Key to phases
Building Technologies Division
Infrastructure & Cities Sector
Phase Function
number
LOC Lockout shutdown phase
OFF Standby, waiting for heat request
oP Operation, modulating operation
oP1 Interval to release of preset load controller (analog or 3-position step input)
01 Undervoltage
02 Safety loop open
04 Extraneous light on burner startup (timeout/lockout after 30 seconds)
08 Power ON/test phase (e.g. detector test)
10 Shutdown, actuator travels to the CLOSED position (home run)
21 Safety valve ON, air pressure switch OFF, actuator travels to the CLOSED
position
22 Part 1: Fan motor ON
Part 2: Specified time air pressure switch
Message (timeout), stabelization of air pressure switch
24 Actuator in prepurge position fahren
30 Part 1: Prepurge time without flame simulation test
Valve proving when...
parameter 241.00 = 1 after power ON, lockout, or
parameter 234 (postpurge time) = 0 second or
parameter 241.01 = 1
Part 2: Prepurge time with flame simulation test
36 Part 1: Actuator opens to a position > ignition load
Part 2: Actuator closes until ignition load position is reached
38 Preignition time
40 Postignition time, parameter 257 + 0.3 seconds
42 Flame detection
44 Interval: End of ignition safety time and fuel valve 2 ON
50 2nd safety time
54 Parameter 259.01: Actuator opens to a position > low-fire
Parameter 260: Actuator closes until low-fire position is reached
72 Operation is ended, check if valve proving shall be conducted
74 Postpurging
80 Test space is evacuated
81 Proving time fuel valve 1
82 Test space is filled
83 Proving time fuel valve 2
90 Pressure switch-min open → safety shutdown
*) During the actuator running phases, the actuator feedback signal must be
OFF first, then ON.
*1 Valve proving is conducted when...
- parameter 241.00 = 1 and parameter 241.02 = 1, or
- parameter 241.00 = 1 and parameter 241.01 = 0
*2 Valve proving is conducted when...
- parameter 241.00 = 1 and parameter 241.02 = 1, or
- parameter 241.00 = 1 and parameter 241.01 = 1
*3 Valve proving is not conducted
*4 Valve proving only in fuel trains G and Gp1
Basic Documentation LME7...
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CC1P7105en
29.11.2011