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Connection diagram and control sequence LME22... / LME23...
NT
K1
K2/1
K2/2
2
10
12
3
7
R / W
T
GP
AL
Z
M
STB
H
Si
L
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
LK
Air damper
LKP
Air damper position
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
CONTROL BOXES LME22
EK
µC control
RESET
K3
K4
4
5
6
9
p a
LP
BV1
BV2
SA
7101a02e/0606
LP
Air pressure switch
LR
Load controller
M
Fan motor
R
Control thermostat / pressurestat
SA
Actuator
STB
Safety limit thermostat
Si
External pre-fuse
t
Time
W
Limit thermostat / pressure
switch
Z
Ignition transformer
ZV
Pilot gas valve
A
Start command (switching on
by «R»)
B-B´
Interval for establishment of
flame
C
Operating position of burner
Color code table for multicolor signal lamp (LED)
Color code
❍ ...................................................................................
● ❍ ● ❍ ● ❍ ● ❍ ● ❍ ● ❍ ● ❍ ● ❍ ● ❍ ● ❍ ● ❍
❑...................................................................................
❑ ❍ ❑ ❍ ❑ ❍ ❑ ❍ ❑ ❍ ❑ ❍ ❑ ❍ ❑ ❍ ❑ ❍ ❑ ❍ ❑ ❍
❑ ▲ ❑ ▲ ❑ ▲ ❑ ▲ ❑ ▲ ❑ ▲ ❑ ▲ ❑ ▲ ❑ ▲ ❑ ▲ ❑ ▲
● ▲ ● ▲ ● ▲ ● ▲ ● ▲ ● ▲ ● ▲ ● ▲ ● ▲ ● ▲ ● ▲
▲...................................................................................
▲ ❍
▲ ❍
▲ ❍
▲
▲
▲
▲
Red
▲
❑
420010567100 Max Gas 350 - 500 PR-MD HT
A
SB / R
W / GP
AL
LK
FSV
M
Z
11
8
1
SA
ION
BV1
(LR) BV2
Nur LME23...
LP
12
2
1
br bl
sw
FS
EK
QRC
EK2
tw
C-D
D
t1
t3
t3n
t4
t10
t11
t12
TSA
tw
▲ ❍
▲ ❍
▲ ❍
▲ ❍
▲
▲
▲
▲
▲
▲
▲
Green
Off
❍
19
B
B´
C
I
t10
t1
t3
t3n
t4
7101d02/0606
t12
TSA
t11
reached
Burner operation (generation
of heat)
Controlled shutdown by «R»
Prepurge time
Preignition time
Postignition time
Interval between ignition
«Off» and release of «V2»
Specified time for air pressure
signal
Programmed opening time for
actuator «SA»
Programmed closing time for
actuator «SA»
Ignition safety time
Waiting time
Color
Off
Flashing yellow
Green
Flashing green
Green-red
Yellow-red
Red
Flashing red
▲ ❍
Red flicker light
▲
Yellow
●
EN
D
12
10
3
7
9
4
5
6
11
1
8
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