LOA24.173A27 [SIEMENS]
Oil Burner Controls;
| 型号： | LOA24.173A27 |
| 厂家： | 
Siemens Semiconductor Group |
| 描述： | Oil Burner Controls |
| 文件： | 总10页 (文件大小：529K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
118
7
ISO 9001
LOA2...
LOA3...
LOA2...
LOA3...
Oil Burner Controls
Oil burner controls for the supervision, startup and control of single- or 2-stage
forced draft oil burners in intermittent operation.
Oil throughput up to 30 kg/h.
The LOA2... / LOA3... and this Data Sheet are intended for use by OEMs which
integrate the oil burner controls in their products.
Use, features
Use
The LOA... are used for the startup, supervision and control of single- or 2-stage forced
draft oil burners in intermittent operation.
Yellow-burning flames are supervised with photoresistive detectors QRB..., blue-
burning flames with blue-flame detectors QRC...
-
-
Forced draft oil burners conforming to EN 267
Oil atomization burners as monoblocks conforming to EN 230
General features
Specific features
-
-
Undervoltage detection
Bridging contact for oil preheater (not with LOA28.173A27)
-
-
Special versions including models for incinerator plant and flash-steam generators
LOA36... with color LED for indicating flame strength and operation
Siemens Building Technologies
HVAC Products
CC1N7118en
09.10.2002
Warning notes
To avoid injury to persons, damage to property or the environment, the following
warning notes should be observed!
Do not open, interfere with or modify the unit!
S
S
S
S
S
Before performing any wiring changes in the connection area of the LOA..., com-
pletely isolate the unit from the mains supply (all-polar disconnection)
Ensure protection against electric shock hazard by providing adequate protection
for the burner control’s connection terminals
Check to ensure that wiring is in an orderly state and that the wires are firmly con-
nected
Press the lockout reset button / operating button only manually (applying a force of
no more than 60 N), without using any tools or pointed objects
Fall or shock can adversely affect the safety functions. Such units may not be put
into operation, even if they do not exhibit any damage
Mounting notes
S
Ensure that the relevant national safety regulations are complied with
Installation notes
S
S
S
Installation and commissioning work must be carried out by qualified staff
Do not mix up live and neutral conductors
Always run high-voltage ignition cables separately while observing the greatest
possible distance to the unit and to other cables
Electrical connection of flame detectors
It is important to achieve practically disturbance- and loss-free signal transmission:
S
Never run the detector cable together with other cables
– Line capacitance reduces the magnitude of the flame signal
– Use a separate cable
Observe the permissible lengths of the flame detector cables (refer to Data Sheets
7714 (QRB...) and 7716 (QRC...))
S
Commissioning notes
S
S
Commissioning work must be carried out by qualified staff
When commissioning the plant, when carrying out maintenance work, or after
longer off periods, make the following safety checks:
Safety check
a) Burner startup with flame detector
darkened
Anticipated response
Lockout at the end of «TSA»
b) Burner startup with flame detector
exposed to extraneous light
Lockout after approx. 40 seconds
c) Simulation of flame failure during
operation. For that purpose, darken
the flame detector during operation
and maintain this state
Repetition followed by lockout at the
end of «TSA»
2/10
Siemens Building Technologies
HVAC Products
CC1N7118en
09.10.2002
Standards
Conformity to EEC directives
Electromagnetic compatibility EMC (immunity) 89 / 336 EEC
Low-voltage directive
73 / 23 EEC
Service notes
S
S
Maintenance work must be carried out by qualified staff
Each time a unit has been replaced, check wiring to ensure it is in an orderly state
and that the wires are firmly connected; make the safety checks as indicated in
«Commissioning notes» above
S
Use the KF... test adapters for short periods of time only
Disposal notes
The unit contains electrical and electronic components and may not be disposed of
together with household waste.
Local and currently valid legislation must be observed.
Mechanical design
The housing is made of impact-proof, heat-resistant and flame-retarding plastic.
The oil burner control is of plug-in design and engages audibly in its base.
The housing accommodates the
-
-
-
thermal-electric sequence switch
flame signal amplifier with the flame relay
lockout reset button with its integrated fault indication lamp
Type summary
The type references given below apply to burner controls without base and without flame detector.
Version
Type reference
Voltage
(VAC)
Under-
voltage
CE
t1
t3
TSAmax.
t3n
t3n´
t4
Replacement
for
detection
Standard version
LOA24.171B27 ²)
LOA24.171B17 ²)
LOA24.173A27
LOA24.174A27
LOA26.171B27 ²)
LOA36.171A27
LOA24.571C27
220
110
220
220
220
220
220
X
X
X
X
X
X
X
x
x
x
x
x
x
x
13
13
13
13
13
13
6
13
13
13
13
13
13
6
10
10
10
10
10
10
10
15
15
20
35
15
15
20
---
---
2
15
15
20
35
15
15
20
LAI2.3
LAI2.3
---
---
---
LAI5
2
With remote reset
facility
For flash-steam
generators
---
---
---
For incinerator plant LOA25.173C27 ¹)
LOA25.173C17 ¹)
220
110
220
X
X
X
---
---
---
13
13
13
13
13
13
10
10
10
---
---
---
2
2
2
15
15
15
LAB2
---
LOA28.173A27 ¹)
¹)
²)
LOA25... and LOA28... are designed for use on incinerator plant where lockout by extraneous light is not desired. These
types of oil burner controls are not covered by EN 230
IRD1010 infrared flicker detectors can also be used
Legend
t1
Prepurge time
t3
Preignition time
t3n
t3n´
t4
Long postignition time
Short postignition time
Interval from establishment of flame to the release of «BV2»
Ignition safety time
TSA
3/10
CC1N7118en
09.10.2002
Siemens Building Technologies
HVAC Products
Ordering
Oil burner control without plug-in base
refer to «Type summary»
refer to Data Sheet 7201
Electrical connections
-
-
-
Plug-in base AGK11...
Cable holders AGK65..., AGK66, AGK67...
Cable strain relief elements for AGK67...
Electrical connections
refer to Data Sheet 7203
-
-
-
Plug-in base AGK13
Plug-in housing AGK56
Cover AGK68
Flame detectors
-
-
Photoresistive detectors QRB1...
Blue-flame detectors QRC1...
refer to Data Sheet 7714
refer to Data Sheet 7716
Pedestal (empty housing)
AGK21
-
To increase the overall height of the LOA...to that of the LAI... / LAB...
Remote reset module
ARK21A27
KF8819
-
For use with the LOA26... / LOA36... printed circuit board versions
Adapter
-
-
For replacing LAB1... / LAI... by LOA...
No rewiring of plug-in base required
Demo case
KF8891
KF8843
KF8885
-
-
For showing the functioning of burner controls
Refer to Operating Instructions B7989
Test case, for making functional tests
-
-
For testing burner controls
Refer to Operating Instructions B7986
Test adapter
-
-
-
-
-
For testing burner controls
With switch for manual startup of burner
With switch for simulating the oil preheater’s release contact
With 2 pairs of jacks for measuring the flame detector current
Refer to Mounting Instructions C7981
Test adapter
KF8833
KF8840
-
-
-
For testing burner controls fitted to the burner
With signal lamps for program indication
With 2 jacks for measuring the flame detector current
Test adapter
-
-
-
-
-
For testing burner controls fitted to the burner
With signal lamps for program indication
With switch for simulating the flame signal
With holes for checking the control voltages at the tabs of the burner control
With 2 jacks for measuring the flame detector’s resistance
4/10
Siemens Building Technologies
HVAC Products
CC1N7118en
09.10.2002
Technical data
General unit data
Mains voltage
AC 220 V –15 %...AC 240 V +10 %
AC 100 V –15 %...AC 110 V +10 %
Mains frequency
50...60 Hz ±6 %
External primary fuse (Si)
Power consumption
Degree of protection
Safety class
10 A (fast)
approx. 3 VA
IP 40, must be ensured through mounting
I
Perm. cable lengths
- Detector cable laid separately
- Remote reset laid separately
Mounting position
max. 3 m with 100 pF/m line capacitance
max. 20 m
max. 20 m
optional
Weight
approx. 180 g
Input current to
-
-
Terminal 1
Terminal 3
5 A (short-time 15 A for max. 0.5 s)
5 A (excl. current draw of burner motor and
oil preheater)
Max. perm. current at
cos ꢀ O 0.6
Terminal Terminal Terminal Terminal Terminal Terminal
4
5
6
7
8
10
LOA24.171B27
LOA24.171B17
LOA24.571C27
LOA25.173C27
LOA25.173C17
LOA28.173A27
LOA24.173A27
LOA24.174A27
LOA26.171B27
LOA36.171A27
1 A
1 A
2 A
2 A
5 A
1 A
1A
1 A
1 A
2 A
2 A
1.5 A
0.1 A
5 A
5 A
1 A
1 A
1 A
Environmental
conditions
Transport
DIN EN 60 721-3-2
class 2K2
Climatic conditions
Mechanical conditions
Temperature range
Humidity
class 2M2
-50...+60 °C
< 95 % r.h.
Operation
DIN EN 60 721-3-3
class 3K5
Climatic conditions
Mechanical conditions
Temperature range
Humidity
class 3M2
-20...+60 °C
< 95 % r.h.
Condensation, formation of ice and ingress of water are not permitted!
5/10
Siemens Building Technologies
HVAC Products
CC1N7118en
09.10.2002
Flame detectors
QRB...
For measuring circuits and detector cable lengths, refer to Data Sheets 7714 (QRB...)
and 7716 (QRC...).
Type of burner control
QRB... (typically)
Max. perm. detector
current
Min. detector current
required (with flame)
Max. detector current
possible (with flame)
(without flame)
LOA24.171B27 / LOA24.171B17
LOA24.571C27
70 µA
5.5 µA
210 µA
LOA25.173C27 / LOA25.173C17
LOA26.171B27
LOA28.173A27
LOA24.173A27
LOA24.174A27
LOA36.171A27
45 µA
70 µA
5.5 µA
5.5 µA
45 µA
900 µA
QRC1...
Type of burner control
QRC... (typically)
Max. perm. detector
current
Min. detector current
required (with flame)
Max. detector current
possible (with flame)
(without flame)
LOA24.171B27
LOA24.571C27
LOA26.171B27
70 µA
5.5 µA
110 µA
LOA24.171B17
70 µA
---
5.5 µA
---
90 µA
---
LOA25.173C27 ¹)
LOA25.173C17 ¹)
LOA28.173A27 ¹)
LOA24.173A27
LOA24.174A27
45 µA
70 µA
5.5 µA
5.5 µA
45 µA
LOA36.171A27
110 µA
¹) These types of LOA... may not be used in connection with QRC...blue-flame detec-
tors
Data given in the above table only apply under the folllowing conditions:
- Mains voltage AC 230 V
- Ambient temperature 23 °C
QRB...
QRC...
Measuring curcuit for
detector current
12
11
bl
12
sw
1
LOA...
LOA...
11
bl
Legend
7118v02/0102
7118v01/0102
br
sw
+
+
µA DC DC microammeter
with an internal resistance of
Ri = max. 5 kꢀ
µA DC
µA DC
bl
Blue
sw
br
Black
Brown
QRB...
QRC1...
Only with LOA36...
Indication of flame
strength
Detector current LED lit
-
-
With QRB...
With QRC...
min. 60 µA ±15 %
min. 40 µA ±15 %
6/10
Siemens Building Technologies
HVAC Products
CC1N7118en
09.10.2002
Function
Preconditions for
startup
S
S
S
S
Burner control is reset
Contacts in the line are closed
No undervoltage
Flame detector is darkened, no extraneous light
Undervoltage detection
An additional electronic circuit ensures that if mains voltage drops below approximately
AC 165 V, burner startup will be prevented, or – without release of oil – lockout will be
triggered.
Control sequence in the
event of fault
Whenever lockout occurs, the outputs for the fuel valves, the burner motor, oil prehea-
ter and ignition equipment will immediately be deactivated (< 1 second).
The lockout indication lamp changes to red and terminal 10 («AL») for remote lockout
indication receives voltage.
This state is also maintained in the event of mains voltage failure.
Cause
Response
Mains voltage failure
New start
Extraneous light on burner startup
Lockout; with LOA25... / LOA28...: Preven-
tion of start
Lockout
Repetition
No flame at the end of «TSA»
Loss of flame during operation
Reset
After lockout, the burner control can be reset after 60...90 seconds (also refer to
«Warning notes»).
Indications
Lockout position
Flame strength
The lockout position is indicated with the lamp integrated in the lockout reset button.
Only with LOA36...
Indication of the flame strength (green LED) is used for checking the flame signal.
To ensure reliable burner operation, this LED must be lit.
If the green LED flickers or extinguishes during burner operation, the light conditions at
the burner are poor, caused by dirt for instance.
Operation
Only with LOA36...
When the contacts of the control thermostat are closed, the orange LED is lit, indicating
the start of the oil preheater’s heating up phase (if present).
7/10
Siemens Building Technologies
HVAC Products
CC1N7118en
09.10.2002
Connection diagram and internal diagram
Control sequence
A´
A´
A´
A
A
A
B
C
C
C
D
D
D
R
LOA24.171B27
LOA24.171B17
LOA24.571C27
1
8
3
tz2
y
SB
W
tz1
f
EK1
fr
c
d
g
L1
e
x
z
a
OH
OW
M
b
FR
5
K
V
t3n
t4
TZ
3
3
6
7
4
1
2
10
8
7
6
4
9
11
12
t1
t3
tw
SB
Z
TSA
OW
W
R
BV1
BV2
FS
QRB
OH
5
Z
AL
N
BV1
11
12
Si
QRC
br
L
M
7118d04/0402
BV2
N
1
B
R
LOA24.173A27
LOA24.174A27
1
8
3
3
7
6
tz2
z
SB
W
tz1
f
EK1
fr
x
c d
g
y
L1
2
e
a
b
OH
OW
M
FR
5
K
V
TZ
1
10
8
3
7
6
4
9
11
12
t3n´
SB
Z
t1
t3
t3n
t4
tw
OW
W
R
TSA
QRB
OH
Z
BV1
4
5
AL
N
BV1
Si
QRC
br
BV2
FS
L
M
BV2
N
11
12
1
7118d01/0402
B
R
LOA25.173C27
LOA25.173C17
LOA28.173A27
1
8
3
3
SB
W
tz2
z
tz1
EK1
fr**
x
y
c d
e f
g
L1
2
OH
OW
OW
a
b
FR
5
K
V
1
2
TZ
3
1
10
8
7
6
4
9
11
12
SB
W
R
M
Z
3
6
7
4
t3n´
t1
t3
tw
OW
TSA
OH
Z
AL
BV1
BV1
BV2
QRB.
t4
Si
M
L
5
BV2
FS
N
11
12
7118d02/0402
fr** Not provided with the LOA28.173A27
1) LOA25.173C27 / LOA25.173C17
2) LOA28.173A27
8/10
Siemens Building Technologies
HVAC Products
CC1N7118en
09.10.2002
Connection diagram and internal diagram
Control sequence
A´
A
B
C
D
R
LOA26.171B27
tz2
z
tz1
1
8
3
3
6
SB
W
EK1
fr
a
x
y
c d
e
f g
L1
FR
5
b
OH
OW
M
With ARK21
remote lockout
reset module
K
V
t3n
TZ
1
2
10
8
3
7
6
4
9
11
12
SB
t1
tw
OW
Z
W
R
QRB
OH
SA
BV1
7
4
5
Z
AL
t3
TSA
SA
N
BV1
10
Si
N
QRC
br
L
M
BV2
t4
N
1
BV2
FS
11
12
2
10
13
9
EK2
7118d05/0402
14
ARK21A27
A´
A
B
C
D
R
LOA36.171A27
tz2
z
tz1
1
8
3
3
6
SB
W
EK1
fr
x
y
c d
f
g
LED1
e
L1
2
a
b
FR
5
OH
OW
M
With ARK21
remote lockout
reset module
K
V
L2
t3n
TZ
1
10
8
3
7
6
4
9
11
12
SB
t1
tw
OW
Z
W
R
QRB
OH
SA
BV1
7
4
5
Z
AL
t3
TSA
SA
N
BV1
10
Si
N
QRC
br
L
M
BV2
EK2
t4
N
1
BV2
FS
11
12
2
10
13
9
7118d05/0402
14
ARK21A27
Legend
AL
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
OW
OH
QRB
QRC
Release contact of oil preheater
Oil preheater
Photoresistive detector
BV...
EK1
EK2
FR
fr
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
R
FS
K
SA
SB
Si
TZ
tz...
W
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
L1
L2
LED1
M
V
Z
TSA
tw
t1
Ignition safety time
Waiting time
Prepurge time
A´
A
B
Beginning of the startup sequence with burners using an «OH»
Beginning of the startup sequence with burners using no «OH»
Time of flame establishment
t3
Preignition time
C
D
Running position
Controlled shutdown by «R»
t3n
t3n´
t4
Long postignition time
Short postignition time
Interval between flame signal and release of «BV2»
Control signals delivered by the LOA...
Required input signals
Permissible input signals
9/10
Siemens Building Technologies
HVAC Products
CC1N7118en
09.10.2002
Dimensions
Dimensions in mm
22
LOA...
41,5
88
91
LOA2...
LOA3...
xxxxxxxxxx
xxxxxxxxxx
7118m03/0300
36,5
Status indication, orange
Indication of flame strength, green
83,5
67,5
*
Remote lockout reset
module ARK21A27
23
12
*
*
+
+
7118m04/0300
Remote lockout reset module for use with the LOA26... / LOA36...
Printed circuit board with no housing.
Degree of protection IP 00, which means that protection against electric shock hazard
must be ensured through mounting.
Do not place any metal objects in the hatched area.
The module must be fitted with the help of spacers made of plastic.
Do not use spacers made of metal.
ꢀ 2002 Siemens Building Technologies
Subject to change!
10/10
Siemens Building Technologies
HVAC Products
CC1N7118en
09.10.2002
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