Siemens LFE1 Series, Datasheet

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11/19
Building Technologies CC1N7461en
21.08.2018
Basic diagram
P (R)
1
EK2*
16
15
14
13
QRA...
+
ION
12
L2
17
M2
M
~
11
GV3
7 10 5 6
GV2 (GV) GV1 Z
N (Mp)
2
18
19
P
P
LP
T
T
GP
W
R1
8
9
4
3
N
M
~
M1
(11)
22 21
LK
N
~
20
a
z
br1
b
a
ar1
ar3
EK1*
a b
fr2
b
a
FR
a
NTC
VIII
IX
XIII
VIII
IX
XI
fr1
b a
b b b a b
a
AR
br2
BR
b a
ar2
UL1
L1
SM
X
XI
II IV VII I
V
XII
IV
VI III
7461a01/0207
SB
AS
When using UV flame detector QRA..., terminal 13 must be earthed.
Attention!
Do not press lockout reset button (EK...) for more than 10 seconds!
AR Load relay with contacts «ar...» LF UV flame detector QRA...
AS Unit fuse LP Air pressure switch
BR Lockout relay with contacts «br...» L1 Lockout warning lamp (built-in)
BS... Operating switch L2 Lockout warning lamp (external)
c Fan contactor with contacts «c...» M... Fan
d Auxiliary relay with contacts «d...» NTC Delay element (negative temperature coefficient)
e Thermal overload contact OV... Oil valve
EK1 Lockout reset button on the burner control QRA... UV flame detector
EK2 Remote lockout reset button R, R1 Control thermostat or pressurestat
ION Ionization probe R2 Load controller
FR Flame relay with contacts «fr...» RV Control valve
FW Flame supervision SB Safety limiter
GP Gas pressure switch SM Synchronous motor of the sequence switch
GV... Gas valve SQ... Air damper actuator (type reference)
(GV) Gas valve for a pilot burner that is switched off after UL1 Operating switch of the sequence switch motor
the second safety time (can only be accessed when housing cover is
H Main switch removed)
LK Actuator with end or auxiliary switches W Temperature or pressure limiter
a = actuator travels to the fully open position Z Ignition transformer
(maximum amount of air) * Do not press lockout reset button «EK...» for more than
z = actuator travels to the fully closed position
(min. amount of air)
10 seconds!
Legend