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.

2/16

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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

Key

Fuel valve

Fan motor

Ignition transformer

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).

3/16

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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

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

Burner startup with flame detector

Lockout at the end of «TSA»

darkened

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.

4/16

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19.05.2016

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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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

TSA

t3n

t3n‘

types

min.

approx.

max.

approx.

Standard version

BPZ:LOA24.171B27

LOA24.171B27

AC 220 V

●

---

LMO14.111C2

LMO24.111C2

BPZ:LOA24.171B17

LOA24.171B17

AC 110 V

●

---

LMO24.111C1

BPZ:LOA24.173A27

LOA24.173A27

AC 220 V

●

LMO14.113C2

With remote reset facility

BPZ:LOA26.171B27

LOA26.171B27

AC 220 V

●

---

LMO14.111C2

LMO24.111C2

BPZ:LOA36.171A27

LOA36.171A27

AC 220 V

●

---

LMO14.111C2

LMO24.111C2

For incinerator plant

AC 220 V

BPZ:LOA25.173C27

LOA25.173C27 ¹)

●

---

BPZ:LOA28.173A27

LOA28.173A27 ¹)

AC 220 V

●

---

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

Prepurge time

Preignition time

t3n

Long postignition time

t3n´

Short postignition time

Interval from establishment of flame to the release of «BV2»

TSA

Ignition safety time

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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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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:

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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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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

at cos  0.6

max.

LOA24.171B17

1 A

2 A

5 A

1 A

LOA24.171B27

1 A

2 A

5 A

1 A

LOA24.173A27

1 A

2 A

1,5 A

5 A

1 A

LOA25.173C27

1 A

2 A

5 A

1 A

LOA26.171B27

1 A

2 A

0,1 A

5 A

1 A

LOA28.173A27

1 A

2 A

5 A

1 A

LOA36.171A27

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.

10/16

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