LOA24.171B17 View Datasheet(PDF) - Siemens AG
Part Name
Description
Manufacturer
LOA24.171B17 Datasheet PDF : 10 Pages
| |||
Connection diagram and internal diagram
LOA26.171B27
With ARK21
remote lockout
reset module
EK1
L1
tz2
x yz
fr
tz1
cd e f g
ab
FR
K
V
TZ
1 2 10
8
3
764
5
SB
OW
W
R
OH
AL
Z
N
SA
BV1
Si
L
N
M
BV2
N
10
2 10
9
13
EK2
14
ARK21A27
9 11
12
QRB
QRC
1
br
Control sequence
R A´
A
B
C
SB
W
OH
OW
t3n
M
tw
t1
Z
SA
BV1
BV2
FS
t3
TSA
t4
7118d05/0402
D
1
8
3
3
6
7
4
5
11
12
LOA36.171A27
With ARK21
remote lockout
reset module
EK1
L1
tz2
x yz
fr
ab
tz1
cd e f g
FR
K
L2
TZ
1 2 10
8
3
764
5
SB
OW
W
R
OH
AL
Z
N
SA
BV1
Si
L
N
M
BV2
N
10
2 10
9
13
EK2
14
ARK21A27
LED1
V
9 11
12
QRB
QRC
1
br
R A´
A
B
SB
W
OH
C
D
1
8
OW
3
t3n
M
3
tw
t1
Z
6
SA
7
t3
TSA
BV1
4
t4
BV2
5
11
FS
7118d05/0402
12
Legend
AL
BV...
EK1
EK2
FR
fr
FS
K
L1
L2
LED1
M
Alarm device
Fuel valve
Lockout reset button
Remote lockout reset button
Flame relay with contacts «fr»
Bridging contact for release contact of «OH»
Flame signal
Catch of flame relay for locking contact «tz1»
in the event of premature flame signals or for locking
the contact when the flame signal is correct
Indication of faults (red)
Indication of operation (green)
Indication of flame strength (green)
Burner motor
OW
OH
QRB
QRC
R
SA
SB
Si
TZ
tz...
W
V
Z
Release contact of oil preheater
Oil preheater
Photoresistive detector
Blue-flame detector
bl = blue, br = brown, sw = black
Control thermostat or pressurestat
Actuator with automatic setback
Safety limit thermostat
External primary fuse
Thermal-electric sequence switch
Contacts of «TZ»
Limit thermostat or pressure switch
Flame signal amplifier
Ignition transformer
TSA
Ignition safety time
A´
Beginning of the startup sequence with burners using an «OH»
tw
Waiting time
A
Beginning of the startup sequence with burners using no «OH»
t1
Prepurge time
B
Time of flame establishment
t3
Preignition time
C
Running position
t3n
Long postignition time
D
Controlled shutdown by «R»
t3n´
Short postignition time
t4
Interval between flame signal and release of «BV2»
Control signals delivered by the LOA...
Required input signals
Permissible input signals
Siemens Building Technologies
HVAC Products
9/10
CC1N7118en
09.10.2002
Share Link: 