EN
Function
Siemens LME21 control and safety unit
Connection diagram and control sequence of LME21...
K1
K2/1
R / W
T
GP
AL
STB
H
Si
N
AGK25... PTC resistor
AL
Error message (alarm)
V...
Fuel valve
CPI
Closed Position Indicator
DBR...
Wire link
EK
Lockout reset button (internal)
EK2
Remote lockout reset button
ION
Ionization probe
FS
Flame signal
FSV
Flame signal amplifier
GP
Pressure switch
H
Main switch
HS
Auxiliary contactor, relay
K1...4
Internal relays
KL
Low-fire
!
Always disconnect the power supply before installing or removing the control unit. Do not attempt to open or carry out repairs on
the control unit.
Status
Waiting time «tw», other waiting states
Ignition phase, ignition controlled
Operation, flame o.k.
Operation, flame not o.k.
Extraneous light on burner startup
Undervoltage
Fault, alarm
Error code output (refer to «Error code
table»)
Interface diagnostics
Legend: ....... Steady on
Function
Control panel
10
www.ecoflamburners.com
RESET
K2/2
K3
K4
LP
Z
V2
M
V1
LK
LKP
LP
LR
M
R
SA
STB
Si
t
W
Z
ZV
A
B-B´
Color code table for multicolor signal lamp (LED)
Color code
❍ ...................................................................................
● ❍ ● ❍ ● ❍ ● ❍ ● ❍ ● ❍ ● ❍ ● ❍ ● ❍ ● ❍ ● ❍
❑...................................................................................
❑ ❍ ❑ ❍ ❑ ❍ ❑ ❍ ❑ ❍ ❑ ❍ ❑ ❍ ❑ ❍ ❑ ❍ ❑ ❍ ❑ ❍
❑ ▲ ❑ ▲ ❑ ▲ ❑ ▲ ❑ ▲ ❑ ▲ ❑ ▲ ❑ ▲ ❑ ▲ ❑ ▲ ❑ ▲
● ▲ ● ▲ ● ▲ ● ▲ ● ▲ ● ▲ ● ▲ ● ▲ ● ▲ ● ▲ ● ▲
▲...................................................................................
▲ ❍
▲
▲
3
0
4
I
1
A
SB / R
W / GP
AL
M
Z
V1
(LR) V2
LP
EK2
FS
tw
t10
7101a22e/0609
Air damper
Air damper position
Air pressure switch
Load controller
Fan motor
Control thermostat / pressurestat
Actuator
Safety limit thermostat
External pre-fuse
Time
Limit thermostat / pressure switch
Ignition transformer
Pilot gas valve
Start command (switching on by «R»)
Interval for establishment of flame
▲ ❍
▲ ❍
▲ ❍
▲ ❍
▲ ❍
▲
▲
▲
▲
▲
▲
▲
❑
❍
Red
Green
Off
2
1 - reset key
2 - working lamp
3 - main switch I / O
4 - fuse
B
B´
t1
t3
t3n
t4
TSA
C
Operating position of burner reached
C-D
Burner operation (generation of heat)
D
Controlled shutdown by «R»
t1
Prepurge time
t3
Preignition time
t3n
Postignition time
t4
Interval between ignition «Off» and release
of «V2»
t10
Specified time for air pressure signal
t11
Programmed opening time for
actuator «SA».
t12
Programmed closing time for actuator «SA».
TSA
Ignition safety time
tw
Waiting time
▲ ❍
▲ ❍
▲
▲
▲
▲
●
Yellow
420010750501
C
D
7101d05/0409
Color
Off
Flashing yellow
Green
Flashing green
Green-red
Yellow-red
Red
Flashing red
Red flicker light