Siemens LAL Series User manual

CC1N7153en

21.09.2016

Building Technologies Division

7153

Oil Burner Controls LAL...

Oil burner controls

For oil atomizing burners of medium to large capacity

For multistage or modulating burners in intermittent operation

With or without air pressure supervision for checked air damper control

Flame supervision

– with photoresistive detector QRB

– or blue-flame detector QRC1

– or silicon photocell detector RAR9

Suitable for use with air heaters (WLE)

The LAL and this Data Sheet are intended for OEMs which integrate the oil

burner controls in their products!

Use

For the control and supervision of oil atomization burners

For burners of medium to high capacity

For intermittent operation (at least one controlled shutdown every 24 hours)

Can be universally used with multistage or modulating burners

Suited for use with stationary air heaters (WLE)

The flame supervision is ensured via a Photoresistive detectors QRB，blue-flame

detectors QRC1 or Silicon photocell detectors RAR9.

LAL1 - Yellow- and blue-flame burners without air pressure supervision

LAL2 - Yellow-flame burners with air pressure supervision

LAL3.25 - For special applications, e.g. burners of incinerator plant

(for details, refer to «Type summary» and «Notes»)

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Supplementary documentation

Product type Type of documentation Documentation number

LOK16 (For burner controls used in

connection with burners for continuous

operation)

Data Sheet N7785

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

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

described in «Commissioning notes»

Press the lockout reset button only manually (applying a force of no more than 10

N), without using any tools or pointed objects

Do not press the lockout reset button on the unit or the remote reset button (input

21) for more than 10 seconds since this will damage the lockout relay in the unit

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

For safety reasons – self-test of the flame supervision circuit, etc. – at least one

controlled shutdown must take place every 24 hours

Mounting notes

Ensure that the relevant safety regulations are complied with

Connect the earthing lug inside the terminal base to burner ground using a screw

with a lockwasher



Note!

In applications involving air heaters (WLE), or in the case of oil burners with a

maximum throughput of >30 kW/h, removing wire link Bis not permitted.

Installation notes

Always run high-voltage ignition cables separately, with the greatest possible

distance to the unit and to other cables

Live and neutral conductors must not be mixed up

Install switches, fuses, earthing, etc., in compliance with local regulations

Make certain that the maximum permissible current rating of the connection

terminals will not be exceeded

The insulation on internal wiring which is subjected to the mains voltage must

withstand the electrical stress occurring during correct use

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Electrical connection of the flame detector

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 cable lengths (refer to «Technical data»)

Commissioning notes

When commissioning the plant or when doing maintenance work, make the following

safety checks:

Safety check to be carried out Anticipated response

a) Burner startup with flame detector darkened Lockout at the end of safety time (TSA)

b) Burner startup with flame detector exposed to

extraneous light

Lockout after 40 seconds at the latest

c) With wire strap «B»:

Simulation of loss of flame during operation. For that

purpose, darken the flame detector during operation

and maintain that state

Lockout

d) Without wire strap «B»:

Simulation of loss of flame during operation. For that

purpose, darken the flame detector during operation

and maintain that state

Repetition followed by lockout at the end of «TSA»

e) Burner startup with response of air pressure switch Prevention of startup/lockout during prepurge time

f) Burner operation with simulated air pressure failure Immediate lockout

Engineering notes

Install switches, fuses, earthing, etc., in compliance with local regulations

Connect valves and other plant components as specified in the burner

manufacturer’s documentation

EK2

211 2

1(3)

4 5 67

BV2

BV1

15 16 17 18

2019 9

7153a03/0814

11 10 822

vLP

141213 23

LAL2

12 3 4 5 6 7 8 9 10

QRB...

RAR...

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Engineering notes (cont’d)

Connect safety limit thermostats (manual reset) in the line (e.g. «SB»)

Remote reset

When connecting lockout reset button «EK2» between terminals 21 and

- terminal 3: For remote reset only

- terminal 1: For remote reset and remote emergency shutdown

With LAL1…: Required switching capacity of

- switching devices connected between terminals 4 and 5 (refer to «Technical data»)

With LAL2 / LAL3: Required switching capacity of

- switching devices connected between terminal 12 and «LP» (refer to «Technical data»)

- «LP» (refer to «Technical data»)

When using series connection, the control contacts of other devices contained in the burner plant must be

connected as follows:

- to terminal 4 or 5 contacts that must be closed from startup to controlled shutdown otherwise no startup

or shutdown

- to terminal 12 (not with LAL1) contacts that must only be closed on startup otherwise no startup

- to terminal 14 (not with LAL1) contacts that must be closed no later than at the beginning of short

preignition or long preignition and that must remain closed until controlled shutdown occurs

otherwise lockout

Maximum current draw, refer to «Technical data»

«Z» connected to terminal 15 short and long preignition

For use in applications with short preignition, the oil supply must be equipped with two shutoff valves

connected in series.

Observe the following:

EN 298:2012, Section 7.101.3.3 Prepurge time for oil burner control systems and the corresponding

application standards.

Connection of «BVx» to terminal 20, refer to «Connection examples»

When using burners without air damper, or with an air damper not controlled and monitored by the LAL…,

terminal 8 must be connected to terminal 6

Wire link «B» clearly marked on the underside of the LAL…

When wire link «B» is fitted, the LAL initiates lockout if loss of flame occurs during operation. For repetition of

the startup sequence, wire link «B» on the plug-in section of the LAL must be cut away. Just cutting is not

permitted!



Note!

In applications involving air heaters (WLE), or in the case of oil burners with a maximum throughput

of >30 kW/h, removing wire link Bis not permitted.

For the permissible lengths and laying of detector cables, refer to «Flame supervision»

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Standards and certificates

Applied directives:

Low-voltage directive 2014/35/EC

Directive for pressure devices 97/23/EC and

2014/68/EC (2016-07-16)

Electromagnetic compatibility EMC

(immunity) *)

2014/30/EC

*) 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:

Automatic burner control systems for burners and

appliances burning gaseous or liquid fuels

DIN EN 298

Automatic electrical controls for household and similar use

Part 2-5:

Particular requirements for automatic electrical burner

control systems

DIN EN 60730-2-5

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 LAL and the AGM 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

Certified with plug-in base and flame detector:

Type

Only with QRB

LAL1.25 ●●●●●●--- ---

LAL2.14 ●●●●●●●---

LAL2.25 ●●●●●●●●

LAL2.65 ●●●●●●●---

LAL3.25 ●●●--- ●●●●

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Life cycle

Burner controls LAL 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 in the standard EN 298.

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

Plug-in design

Exchangeable unit fuse (including spare fuse)

Difference to LAL1 / LAL2:

Extraneous light does not initiate lockout, during burner off times or during the

prepurge time

Extraneous light prevents burner startup

Made of impact-proof and heat-resistance black plastic

Lockout reset button with viewing window; located behind it:

– Lockout warning lamp

– Lockout indicator

- coupled to the spindle of the sequence switch

- visible in the transparent lockout reset button

- uses easy-to-remember symbols to indicate the type of fault and the point

in time lockout occurred

LAL

LAL3.25

Housing

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Type summary

The type references given below apply to the LAL without plug-in base and without flame detector. For ordering information for plug-in bases and other accessories, see Accessories.

Switching times are given in the order of the startup sequence, valid for 50 Hz mains frequency. At 60 Hz frequency, switching times are about 17 % shorter.

The type references apply to burner controls operating on AC 230 V, 50...60 Hz.

Article no. Type

Flame

supervision

with ...

ir pressure supervision

Semi-automatic startup

No lockout

Start prevention in extraneous light

Flash steam gene

ators

Universal use

Medium- or heavy-oil burners

Times in seconds

QRB

QRC

RAR9

t1 TSA t3 t3‘ t3n t4 t5 t6 t7 t8 t10 t11 t12 t13 t16 t20

BPZ:LAL1.25 LAL1.25 ³) ●●●22,5 5 2,5 From the

start ¹) 15 7,5 7,5 15 2,5 47 10 ²) Optional Optional 15 5 35

BPZ:LAL2.14 LAL2.14 ³) ●●●●●10 4 2 From the

start ¹) 10 8 4 10 2 30 6 Optional Optional 10 4 32

BPZ:LAL2.25 LAL2.25 ³) ●●●●●22,5 5 2,5 From the

start ¹) 15 7,5 7,5 15 2,5 47 10 ²) Optional Optional 15 5 35

BPZ:LAL2.65 LAL2.65 ³) ●●●●●66,5 5 2,5 From the

start ¹) 15 7,5 7,5 15 2,5 91 10 Optional Optional 15 5 12,5

BPZ:LAL3.25 LAL3.25 ³)4) ●●●●●●●22,5 5 2,5 From the

start ¹) 15 7,5 7,5 15 2,5 47 10 ²) Optional Optional 15 5 35

¹) With air pressure supervision: From the time the air pressure signal is received

²) Does not apply to LAL1

³) Available as AC 100...110 V versions; add type suffix «– 110 V» when ordering. Flame supervision only with QRB or RAR

4) Special applications such as incinerator plants

Legend of times

TSA Ignition safety time t7 Interval between start command and power at terminal 7 (start delay for fan motor «M2»)

t1 Prepurge time with air damper open t8 Duration of startup sequence (without running time «t11» and running time «t12»)

t3 Preignition time, short (ignition (Z) to terminal 16) t10 Only with LAL2 / LAL3: Interval from start to the beginning of the air pressure check

t3‘ Preignition time, long (ignition (Z) to terminal 15) t11 Air damper running time to the OPEN position

t3n Postignition time (ignition (Z) to terminal 15) t12 Air damper running time to the low-fire position MIN

t4 Interval between voltage at terminals 18 and 19 (fuel valve 1 (BV1) - fuel valve 2 (BV2)) t13 Permissible afterburn time

t5 Interval between power at terminals 19 and 20 (fuel valve 2 (BV2) - load controller) t16 Interval until OPEN command for the air damper is given

t6 Postpurge time (with fan motor «M2») t20 Not with all LAL: Interval to the self-shutdown of the sequence switch after startup

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Accessories (to be ordered separately)

Flame detectors Photoresistive detectors QRB

See Data Sheet N7714

Blue-flame detectors QRC1

See Data Sheet N7716

Frontal illumination:

Lateral illumination:

Silicon photocell detectors RAR9

See Data Sheet N7713

Actuators Actuator SQN3

See Data Sheet N7808

Accessories for medium-

capacity burner controls Plug-in base AGM410490500

Article no.: BPZ:AGM410490500

With Pg11 thread for cable entry glands

See Data Sheet N7230

Plug-in base AGM13.1

Article no.: BPZ:AGM13.1

With M16 thread for cable entry glands

See Data Sheet N7230

Others Coaxial cable RG62

Supplied by customer.

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Technical data

Mains voltage

With LAL1 / LAL2 / LAL3

AC 230 V –15 / +10 %

AC 100 V –15 %...AC 110 V +10 %

Mains frequency 50...60 Hz ±6 %

Unit fuse (built-in) T6.3H250V to DIN EN 60127

Primary fuse (external) Max. 10 A (slow)

Weight Approx. 1,000 g

Power consumption Approx. AC 3.5 VA

Mounting position Optional

Degree of protection IP40, when fitted, with the exception of the

connection area (terminal base)

Safety class II

Perm. input current at terminal 1 Max. 5 A continuously

(peaks of 20 A / 20 ms)

Perm. current rating of control terminals

3, 6, 7, 9...11 and 15...20

Max. 4 A continuously

(peaks of 20 A / 20 ms)

Required switching capacity of switching

devices

Between terminals 4 and 5

Between terminals 4 and 12

Between terminals 12 and «LP»

Between terminals 4 and 14

«LP»

1 A, AC 250 V

5 A (peaks of 20 A)

5 A

Permissible length of the standard detector

cable (laid separately)

See Technical data, section Flame

supervision

Capacity

Starting output (without fan)

Nominal output

Optional (with ignition < 120 kW)

Optional

Storage DIN EN 60721-3-1

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 -40...+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 this is not observed, there is a risk of loss of safety functions and a risk of

electric shock.

General unit data LAL

Environmental

conditions

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Technical data (cont´d)

LAL1 with LAL2 * / LAL3 * with

QRB QRC1 QRB RAR9

Min. detector current required at AC 230 V 95 µA 80 µA 8 µA 6,5 µA

Max. permissible detector current with no

flame

12 µA 12 µA 0.8 µA 0.7 µA

Max. detector current that can occur 160 µA 130 µA 35 µA 45 µA

Instrument’s +pole To terminal 23 To terminal 23 To terminal 22 To terminal 22

Length of detector cable

In the same cable as the

control lines

Max. 30 m --- Not

permitted

---

Separate cable in cable duct Max. 1000 m --- 20 m 30 m

3-core cable --- Max. 1 m --- ---

2-core cable for the detector line (bl, sw);

separate single-core cable for the live

conductor (br)

--- Max. 20 m --- ---

Shielded cable (e.g. RG62, shield insulated) --- --- 200 m RAR9: 100 m

Shield --- --- To terminal 23 ---

* To comply with requirement of EN 298 clause 8.5 «Surge immunity test», for cable lengths above

10 m appropriate filter elements would have to be used. Experience has shown that filters are

sometimes not necessary for normal operation even for cable lengths above 10 m.

Detector current measurement

7153v01/0814

2322

LAL1...

swbl br

µA DC

7153v05/1206

7153v02/0814

Flame supervision

Measuring circuit for

detector current

measurement

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