Siemens LOA2 Series User manual

44 ซ.บรมราชชนนี 70 ถ.บรมราชชนนี ศาลาธรรมสพน์ ทวีวัฒนา กทม. 10170.
website: https://www.add-furnace.com/ โทร: 02-888-3472
Line ID: @add11 Wechat ID: add0883001122
7118
LOA2... LOA3...
Oil Burner Controls LOA2...
LOA3...
Oil burner controls for the supervision, startup and control of 1- or 2-stage forced
draft oil burners in intermittent operation. Oil throughput of less than 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
General features
Specific features
CC1N7118en
19.05.2016
The LOA... are used for the startup, supervision and control of 1- 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...
Applications in accordance with EN 267: Automatic forced draft burners for liquid
fuels
Type-tested and approved in accordance with DIN EN 230:1991
- Undervoltage detection
- Bridging contact for oil preheater (not with LOA28.173A27)
- Special versions including models for incinerator plants and flash-steam generators
- LOA36... with color display of flame intensity and operating
Note!Donot use for new designs.
Building Technologies Division

44 ซ.บรมราชชนนี 70 ถ.บรมราชชนนี ศาลาธรรมสพน์ ทวีวัฒนา กทม. 10170.
website: https://www.add-furnace.com/ โทร: 02-888-3472
Line ID: @add11 Wechat ID: add0883001122
Warning notes
To avoid injury to persons, damage to property or the environment, the following
warning notes must be observed!
Do not open, interfere with or modify the unit!
All activities (mounting, installation and service work, etc.) must be performed by
qualified staff
Before making any wiring changes in the connection area, completely isolate the
plant from mains supply (all-polar disconnection). Ensure that the plant cannot be
inadvertently switched on again and that it is indeed dead. If not observed, there is
a risk of electric shock hazard

Ensure protection against electric shock hazard by providing adequate protection
for the burner control’s connection terminals. If not observed, there will be a risk of
electric shock
Each time work has been carried out (mounting, installation, service work, etc.),
check to ensure that wiring is in an orderly state and make the safety checks as
indicated in Commissioning notes above. If this is not observed, there is a risk
of loss of safety functions and a risk of electric shock.

Press the lockout reset button / operating button only manually (applying a force
of no more than 10 N), without using any tools or pointed objects. If this is not
observed, there is a risk of loss of safety functions and a risk of electric shock.

Fall or shock can adversely affect the safety functions. Such units must not be put
into operation, even if they do not exhibit any damage. If this is not observed,
there is a risk of loss of safety functions and a risk of electric shock.
Attention!
Earth the burner in compliance with the relevant regulations; earthing the
boiler alone does not suffice!
Mounting notes
Ensure that the relevant national safety regulations are complied with.
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44 ซ.บรมราชชนนี 70 ถ.บรมราชชนนี ศาลาธรรมสพน์ ทวีวัฒนา กทม. 10170.
website: https://www.add-furnace.com/ โทร: 02-888-3472
Line ID: @add11 Wechat ID: add0883001122
Installation notes
Always run high-voltage ignition cables separately while observing the greatest
possible distance to the unit and to other cables
Make absolutely certain that live and neutral conductors are correctly connected to
terminals 1 and 2 of the burner control
Install switches, fuses, earthing, etc., in compliance with local regulations

Ensure that the maximum permissible current load for the connecting terminals is
not exceeded (refer to Technical data)
Do not feed external mains voltage to the control outputs of the burner control.
When testing the function of devices controlled by the burner control (fuel valves or
similar), the burner control must not be connected
To disconnect the unit from the mains, a complete shut-down must be carried out
under overvoltage category III conditions in each pole

Secure the earthing lug in the terminal base with a metric screw and a lockwasher
or similar
Switches, fuses, earthing, etc., must be in compliance with local regulations;
primary fuse max. 10 A (fast)
For safety reasons, feed the neutral conductor to the neutral distributor in the plug-
in base, or to terminal 2. Connect the burner components (fan, ignition transformer
and fuel valves) to the neutral distributor as shown in the figure 7435a14. The
connection between the neutral conductor and terminal 2 is prewired in the
terminal base
Example
2
3
7
4
5
Key
M
V2
Vx
Fuel valve
M
Fan motor
Z
V1
Z
Ignition transformer
N
7435a14/0601
Correct wiring of neutral conductors!
Electrical connection of flame detectors
It is important to achieve practically disturbance- and loss-free signal transmission:
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 detector cables, see Technical data and
Data Sheet / Flame detector QRB (N7714) and QRC (N7716).
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CC1N7118en
19.05.2016

44 ซ.บรมราชชนนี 70 ถ.บรมราชชนนี ศาลาธรรมสพน์ ทวีวัฒนา กทม. 10170.
website: https://www.add-furnace.com/ โทร: 02-888-3472
Line ID: @add11 Wechat ID: add0883001122
Commissioning notes
When commissioning the plant, when carrying out maintenance work, or after longer off
periods, make the following safety checks:
Safety check to be carried out
Anticipated response
a)
Burner startup with flame detector
Lockout at the end of «TSA»
darkened
b)
Burner startup with flame detector
Lockout after approx. 40 seconds
exposed to extraneous light
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»
Standards and certificates
Applied directives:
Low-voltage directive 2006/95/EC
Electromagnetic compatibility EMC 2004/108/EC
(immunity) *)
*) The compliance with EMC emission requirements must be checked after the burner control
is installed in equipment
Compliance with the regulations of the applied directives is verified by the
adherence to the following standards / regulations:
Household and similar electrical appliances - Safety
Electrical equipment of non-electric heated cooking and heating
appliances
The relevant valid edition of the standards can be found in the declaration
of conformity!
Note on DIN EN 60335-2-102
Household and similar electrical appliances - Safety - Part 2-102:
Particular requirements for gas, oil and solid-fuel burning appliances having electrical
connections. The electrical connections of the LOA and the AGK11 comply with the
requirements of EN 60335-2-102.
EAC Conformity mark (Eurasian Conformity mark)
ISO 9001:2008
ISO 14001:2004
OHSAS 18001:2007
China RoHS
Hazardous substances table:
http://www.siemens.com/download?A6V10883536
Service notes
The service adapters can only be used for a short time. They may only be used in
supervised operation by qualified staff.
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VDE 0700
VDE 0722

44 ซ.บรมราชชนนี 70 ถ.บรมราชชนนี ศาลาธรรมสพน์ ทวีวัฒนา กทม. 10170.
website: https://www.add-furnace.com/ โทร: 02-888-3472
Line ID: @add11 Wechat ID: add0883001122
Life cycle
Burner controls has a designed lifetime* of 250,000 burner startup cycles which, under
normal operating conditions in heating mode, correspond to approx. 10 years of usage
(starting from the production date given on the type field).
This lifetime is based on the endurance tests specified in standard EN 230.
A summary of the conditions has been published by the European Control
Manufacturers Association (Afecor) (www.afecor.org).
The designed lifetime is based on use of the burner controls according to the
manufacturer’s Data Sheet. After reaching the designed lifetime in terms of the number
of burner startup cycles, or the respective time of usage, the burner control is to be
replaced by authorized personnel.
* The designed lifetime is not the warranty time specified in the Terms of Delivery
Disposal notes
The unit contains electrical and electronic components and must not be disposed of
together with domestic waste.
Local and currently valid legislation must be observed.
Mechanical design
The oil burner controls are of plug-in design, suitable for installation in any position on
burners, in control cabinets or on control panels.
The housing is made of impact-proof, heat-resistant and flame-retarding plastic.
It is of plug-in design (measuring 91 x 62 x 63 mm, including the plug-in base) and
engages audibly in the plug-in base.
The color of plastic material of burner controls LOA... are executed in black.
The housing includes ...
- the thermoelectric programmer acting on a multi-tilting switching system,
compensated for ambient temperature
-flame signal amplifier with the flame relay
-... lockout reset button with its integrated lockout indication lamp
Undervoltage detection
If mains voltage drops below about AC 165 V, an electronic circuit ensures that the oil
burner control will prevent burner startup or –without releasing fuel –lockout will be
initiated.
5/16
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44 ซ.บรมราชชนนี 70 ถ.บรมราชชนนี ศาลาธรรมสพน์ ทวีวัฒนา กทม. 10170.
website: https://www.add-furnace.com/ โทร: 02-888-3472
Line ID: @add11 Wechat ID: add0883001122
Type summary
The type references given in the table refer to oil burner controls with no plug-in base and no accessories. For ordering information for plug-in bases and other accessories,
see Accessories.
Article no.
Type
Main voltage
Undervoltage detection
Times in seconds
Replacement
t1
t3
TSA
t3n
t3n‘
t4
types
min.
approx.
max.
approx.
approx.
approx.
Standard version
BPZ:LOA24.171B27
LOA24.171B27
AC 220 V
●
13
13
10
20
---
20
LMO14.111C2
LMO24.111C2
BPZ:LOA24.171B17
LOA24.171B17
AC 110 V
●
13
13
10
20
---
20
LMO24.111C1
BPZ:LOA24.173A27
LOA24.173A27
AC 220 V
●
13
13
10
20
2
20
LMO14.113C2
With remote reset facility
BPZ:LOA26.171B27
LOA26.171B27
AC 220 V
●
13
13
10
20
---
20
LMO14.111C2
LMO24.111C2
BPZ:LOA36.171A27
LOA36.171A27
AC 220 V
●
13
13
10
20
---
20
LMO14.111C2
LMO24.111C2
For incinerator plant
AC 220 V
BPZ:LOA25.173C27
LOA25.173C27 ¹)
●
13
13
10
---
2
20
---
BPZ:LOA28.173A27
LOA28.173A27 ¹)
AC 220 V
●
13
13
10
---
2
20
---
Legend
¹)
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
t1
Prepurge time
t3
Preignition time
t3n
Long postignition time
t3n´
Short postignition time
t4
Interval from establishment of flame to the release of «BV2»
TSA
Ignition safety time
6/16
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44 ซ.บรมราชชนนี 70 ถ.บรมราชชนนี ศาลาธรรมสพน์ ทวีวัฒนา กทม. 10170.
website: https://www.add-furnace.com/ โทร: 02-888-3472
Line ID: @add11 Wechat ID: add0883001122
Test adapter (must be ordered separately)
Test adapter KF8833
For checking the functions of burner controls on
the burner
With signal lamps for program indication

With one pair of jacks for measuring the flame
detector current
Test adapter KF8840
For checking the functions of burner controls on
the burner

With signal lamps for program indication

With on / off switch for simulating the flame signal

With holes for checking the control voltages at the tabs
of the burner control

With one pair of jacks for measuring the flame
detector’s resistance
Test adapter KF8885
For checking the functions of burner controls on
the burner

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 B7986
7/16
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44 ซ.บรมราชชนนี 70 ถ.บรมราชชนนี ศาลาธรรมสพน์ ทวีวัฒนา กทม. 10170.
website: https://www.add-furnace.com/ โทร: 02-888-3472
Line ID: @add11 Wechat ID: add0883001122
Accessories (must be ordered separately)
Connection
accessories for small
burner controls
Plug-in base AGK11…
To connect the small-capacity burner controls to the
burner plant.
See Data Sheet N7201
Cable holder AGK66…
For plug-in base AGK11.
See Data Sheet N7201
Cable holder AGK65…
For plug-in base AGK11.
See Data Sheet N7201
Flame detectors
Photoresistive detectors QRB...
See Data Sheet N7714
Frontal illumination:
Blue-flame detectors QRC...
See Data Sheet N7716
8/16
Lateral illumination:
Building Technologies Division CC1N7118en
19.05.2016

44 ซ.บรมราชชนนี 70 ถ.บรมราชชนนี ศาลาธรรมสพน์ ทวีวัฒนา กทม. 10170.
website: https://www.add-furnace.com/ โทร: 02-888-3472
Line ID: @add11 Wechat ID: add0883001122
Accessories (must be ordered separately)
Actuators
Actuator SQN3...
See Data Sheet N7808
Actuator SQN7...
See Data Sheet N7804
Actuator SQN9...
See Data Sheet N7806
Adapters / replacement
No rewiring required
types
Adapter KF8819
For replacing LAB1... / LAI... by LOA...

No rewiring of plug-in base required
Others Remote reset module ARK21A27
For use with the LOA26... / LOA36... printed circuit
board versions
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44 ซ.บรมราชชนนี 70 ถ.บรมราชชนนี ศาลาธรรมสพน์ ทวีวัฒนา กทม. 10170.
website: https://www.add-furnace.com/ โทร: 02-888-3472
Line ID: @add11 Wechat ID: add0883001122
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)
Max. 10 A (fast)
Power consumption
Approx. 3 VA
Perm. mounting position
Optional
Degree of protection
IP40, must be ensured through mounting
Safety class
I (burner control with plug-in base)
Input current to
Max. 5 A (short-time 15 A for max. 0.5 s)
-
Terminal 1
-
Terminal 3
Max. 5 A (excl. current draw of burner
motor and oil preheater)
Perm. cable lengths
Max. 3 m with 100 pF/m line capacitance
- Detector cable laid separately
Max. 20 m
- Remote reset laid separately
Max. 20 m
(refer to Flame supervision chapter)
Weight
Approx. 180 g
Perm. current
Terminal
Terminal
Terminal
Terminal
Terminal
Terminal
at cos  0.6
4
5
6
7
8
10
max.
max.
max.
max.
max.
max.
LOA24.171B17
1 A
1 A
2 A
2 A
5 A
1 A
LOA24.171B27
1 A
1 A
2 A
2 A
5 A
1 A
LOA24.173A27
1 A
1 A
2 A
1,5 A
5 A
1 A
LOA25.173C27
1 A
1 A
2 A
2 A
5 A
1 A
LOA26.171B27
1 A
1 A
2 A
0,1 A
5 A
1 A
LOA28.173A27
1 A
1 A
2 A
2 A
5 A
1 A
LOA36.171A27
1 A
1 A
---
---
---
---
Environmental
Storage
DIN EN 60721-3-1
conditions
Climatic conditions
Class 1K3
Mechanical conditions
Class 1M2
Temperature range
-20...+60 °C
Humidity
<95 % r.h.
Transport
DIN EN 60721-3-2
Climatic conditions
Class 2K2
Mechanical conditions
Class 2M2
Temperature range
-50...+60 °C
Humidity
<95 % r.h.
Operation
DIN EN 60721-3-3
Climatic conditions
Class 3K5
Mechanical conditions
Class 3M2
Temperature range
-20...+60 °C
Humidity
<95 % r.h.
Installation altitude
Max. 2,000 m above sea level
Warning!
Condensation, formation of ice and ingress of water are not permitted!
If not observed, the safety functions are no longer ensured and there will be a
risk of electric shock.
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