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Smart Infrastructure
Basic Documentation LME7…
CC1P7105en
Contents
24.07.2020
4.10
Dummy plug for RJ11 .................................................................................... 34
4.11
Environmental conditions .............................................................................. 35
4.12
Flame supervision ......................................................................................... 36
4.12.1
Ionization probe ............................................................................................. 36
4.12.2
QRA2 / QRA4 / QRA10 (LME71 / LME73 only) ............................................ 38
4.12.3
QRB1/QRB3/ QRB4 ...................................................................................... 39
4.12.4
QRC ............................................................................................................... 41
5
Dimensions .................................................................................................... 42
6
Function ......................................................................................................... 43
6.1
Preconditions for burner startup .................................................................... 43
6.2
Undervoltage ................................................................................................. 43
6.3
Controlled intermittent operation ................................................................... 43
6.4
Control sequence in the event of fault ........................................................... 44
6.5
Resetting the LME7 ....................................................................................... 44
6.6
Restart limitation ............................................................................................ 45
6.6.1
Restart in the event of loss of flame .............................................................. 45
6.6.2
Repetition in case of
no flame is established by the end of safety time
(TSA)
............................................................................................................. 45
7
Operation, indication, diagnostics .................................................................. 46
7.1
Operation ....................................................................................................... 46
7.2
Indication of operating state .......................................................................... 46
7.3
Diagnostics of cause of fault .......................................................................... 47
8
Inputs / outputs .............................................................................................. 49
9
Connection diagram AGG9 connector ........................................................... 50
9.1
LME71 ........................................................................................................... 50
9.2
LME72 ........................................................................................................... 51
9.3
LME73 ........................................................................................................... 52
10
LME7 burner control ...................................................................................... 53
10.1
Description of inputs and outputs .................................................................. 53
10.2
Digital input .................................................................................................... 54
10.2.1
Safety Loop terminal X3–04 pin 1 and 2 ....................................................... 54
10.2.2
Input for external controller (ON/OFF) terminal X5–03 pin 1 ......................... 54
10.2.3
Air pressure switch terminal X3–02 ............................................................... 55
10.2.4
Input gas pressure switch-min ....................................................................... 55
11
Multistage or modulating mode with actuator ................................................ 56
11.1
Relevant parameters ..................................................................................... 56
11.1.1
Connection diagram for feedback potentiometer ASZ12.33 .......................... 56
