Siemens LOK16 Series User manual

CC1N7785en

20.11.2017

Building Technologies Division

7785

Burner Controls LOK16...

LGK16...

Burner controls

For gas, oil or dual-fuel forced draft burners of medium to high capacity

For multistage or modulating burners in continuous operation

With air pressure supervision for checked air damper control.

Flame supervision

- LOK16: With silicon detector RAR

- LGK16: With flame detector QRA53/QRA55/ionization probe

Burner control for oil burners or gas burners in accordance with EN 298:2012

Suitable for use with air heaters (WLE)

With self-checking flame signal amplifier

The LOK16.../LGK16... and this Data Sheet are intended for use by OEMs which

integrate the burner controls in their products.

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Use

Burner controls type LOK16.../LGK16... feature a self-checking flame supervision

circuit.

The flame supervision circuit initiates the safety actions in the case of... :

• ... premature or missing flame signal

• ... any kind of fault on the flame detector, the detector cables or the flame signal

amplifier that could simulate a flame signal during burner operation

The burner controls are therefore suited for use in all types of oil- or gas-fired

combustion plant where self-checking flame supervision systems are either mandatory

or recommended.

For example:

-Burners that operate continuously

-Burners in intermittent operation that, in the case of great heat demand, may

operate continuously for more than 14 hours, e.g. in plant using boiler sequencing

-Burners that need to comply with the German TRD 411 and TRD 412 regulations

for steam boilers

-Burners in plant where, for specific safety requirements, supervision of the burner

by a self-checking flame supervision system seems advisable

-The control sequence and connection circuitry of the LOK16…/LGK16… burner

controls are identical to those of the LAL2... and LFL1... respectively (with the

exception of the LFL1.148), so that existing combustion plant can also be equipped

with self-checking burner controls,

provided very good flame detector current values are measured in the plant

supervised so far by the LFL1..., and

provided the following types of flame detectors are either installed or can

subsequently be fitted:

-Photocell detector RAR9

-Flame detector QRA53.../QRA55...

-Ionization probe

-Flame detector QRA53.../QRA55... together with ionization probe, e.g. in the case

of burners using a pilot burner (also see Data Sheet N7712)

Flame supervision

when using LOK16...

Flame supervision

when using LGK16...

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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 would damage the lockout

relay inside 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

In the case of flame supervision with flame detectors QRA53 / QRA55, it should be

noted that sources of radiation such as halogen lamps, welding equipment, special

lamps, ignition sparks, as well as X-rays and gamma radiation, can produce

erroneous flame signals

Mounting notes

Ensure that the relevant national safety regulations are complied with.

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

with a lockwasher

An ignited UV tube is a source of UV radiation!

If the flame is monitored by several flame detectors, all detectors must be placed in

a way that ensures there is no direct visual contact between them.

If this is not observed, there is a risk of loss of safety functions

When equipping existing plants with LOK16 or LGK16, the existing plug-in base for LAL

or LFL burner controls must be replaced with the matching plug-in base AGM17 for

LOK16 / LGK16.

By removing link (B) on the underside of the unit, the LOK16... can be switched to start

repetition in the event of loss of flame during operation.

In that case, the wire link must be cut off completely.

However, it must be checked whether this is in compliance with national standards and

regulations.



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.

Upgrading existing plant

Start repetition in the

event of loss of flame

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Installation notes

Always run the high-voltage ignition cables separately while observing the greatest

possible distance to the unit and to other cables

Neutral conductors must not be interchanged

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 of internal wiring that is exposed to the mains voltage must

withstand the electrical stress occurring during correct use

Application notes

Note!

For use in applications in dual-fuel burners or oil burners, 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.

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 detector cable lengths (see Technical data)

It is not permitted to connect 2 flame detectors QRA53.../QRA55... in parallel

When using the QRA53.../QRA55..., earthing of terminal 22 is mandatory

The ionization probe is not protected against electric shock hazard

Locate the ignition electrode and ionization probe such that the ignition spark

cannot arc over to the ionization probe (risk of electrical overloads) and that it

cannot adversely affect the supervision of ionization

Supervision with ionization probe and QRA53/QRA55 flame detector is possible

but, for safety reasons, both must not be active at the same time, with the

exception of the second safety time (t9). At the end of the second safety time, one

of the detected flames must extinguish, e.g. by shutting down the pilot gas valve

connected to terminal 17

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

b) Burner startup with simulated flame Lockout after no more than 40 seconds

c) Burner operation with simulated loss

of flame; for that purpose, darken the

flame detector in operation and leave

it in that state

LOK16... with wire link cut: Start

repetition followed by lockout at the end

of safety time

LGK16... and LOK16... with wire link

closed: Immediate lockout

d) Burner startup with response of air

pressure switch

Prevention of startup/lockout during

prepurge time

e) Burner operation with simulated air

pressure failure

Immediate lockout

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Commissioning notes

For the connection of valves and other components, the diagram of by the burner

manufacturer is provide.

Standards and certificates

Applied directives:

Low-voltage directive 2014/35/EC

Directive for pressure devices 2014/68/EC

Electromagnetic compatibility EMC (immunity) *) 2014/30/EC

Only LGK16: Directive for gas-fired appliances 2009/142/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

Only LGK16

Safety and control devices for gas burners and gas

burning appliances

DIN EN 13611:

2007-A2:2011

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 LMV5 and the PLL5 comply with the requirements of

EN 60335-2-102.

EAC Conformity mark (Eurasian Conformity mark)

ISO 9001:2015

ISO 14001:2015

OHSAS 18001:2007

China RoHS

Hazardous substances table:

http://www.siemens.com/download?A6V10883536

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Certified with plug-in base and flame detector:

Type reference

LOK16.140... --- --- ---

LOK16.250... --- --- ---

LOK16.650... --- --- ---

LGK16.122... --- --- 

LGK16.133A17 --- --- --- --- 

LGK16.133A27 --- --- 

LGK16.322... --- --- 

LGK16.333... --- --- 

LGK16.335... --- --- 

LGK16.622... --- --- 

LGK16.635... --- --- 

Service notes

The KF8832 flame detector current measuring device must not be used in continuous

operation.

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 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 household waste.

Local and currently valid legislation must be observed.

Mechanical design

Plug-in design

Exchangeable unit fuse (including spare fuse)

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

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

- The lockout warning lamp

- The 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

LGK16.../LOK16...

Housing

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Type summary

The type references given below apply to the LOK16 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, the times are about approx. 17% shorter.

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

* For burner controls operating on AC 100...110 V, 50...60 Hz, the last 2 digits of the type reference read «17» in place of «27».

For flame supervision with a photocell detector RAR9... for oil burners

Preferred use:

Flash-steam

generators

Universal

application

Medium- or

heavy-oil burners

Type LOK16.140A27* LOK16.250A27* LOK16.650A27

Article

no. BPZ:LOK16.140A27 BPZ:LOK16.250A27 BPZ:LOK16.650A27 Legend of times

t1 10 s 22 s 66 s Prepurge time with air damper fully open

TSA 4 s 5 s 5 s Safety time or first safety time

TSA´ --- --- --- Safety time with burners using a pilot burner

t3 2 s 2.5 s 2.5 s Preignition time

t3´ From startup command (with air pressure supervision:

from receipt of air pressure signal)

Long preignition time

t3n 10 s 15 s 15 s Postignition time (ignition transformer connected to

terminal 15)

t4 8 s 7.5 s 7.5 s Interval between start of safety time and release of

valve at terminal 19

t4´ --- --- --- Interval between start of safety time and release of

valve at terminal 19

t5 4 s 7.5 s 7.5 s Interval between end of interval (t4/t4´) and release of

load controller or valve at terminal 20

t6 10 s 15 s 15 s Postpurge time (identical to permissible afterburn time

(t13))

t7 2 s 2.5 s 2.5 s Switch-on delay of fan motor (M2)

t8 30 s 47 s 91 s Duration of startup without «t11» and «t12»

t9 --- --- --- Second safety time with burners using a pilot burner

t10 6 s 10 s 10 s Interval from startup to the beginning of the air

pressure check

t11 Optional Air damper running time to the fully open position

t12 Optional Air damper running time to the low-fire position

t13 10 s 15 s 15 s Permissible afterburn time

t16 4 s 5 s 5 s Interval from startup to the open command for the air

damper

t20 32 s 34.5 s 12.5 s Interval to self-shutdown of the sequence switch

LOK16...

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Type summary (cont’d)

The type references given below apply to the LGK16 without plug-in base and without

flame detector. For ordering information for plug-in bases and other accessories, see

Accessories.

For flame supervision with flame detector QRA53.../QRA55... or ionization probe

Preferred use:

Flash-steam

generators

Flash-steam

generators

Also suited for

direct-fired air

heaters)

Type LGK16.122A27* LGK16.133A27 LGK16.322A27* LGK16.333A27* LGK16.335A27* LGK16.622A27* LGK16.635A27*

Article

no. BPZ:LGK16.122A27 BPZ:LGK16.133A27 BPZ:LGK16.322A27 BPZ:LGK16.333A27 BPZ:LGK16.335A27 BPZ:LGK16.622A27 BPZ:LGK16.635A27

t1 10 s 9 s 35.5 s 31.5 s 37 s 65 s 66 s

TSA 2 s 3 s 2 s 3 s 2.5 s 2 s 2.5 s

TSA´ 2 s 3 s 2 s 3 s 5 s 2 s 5 s

t3 4 s 3 s 4 s 6 s 5 s 4 s 5 s

t3´ 4 s --- 4 s 6 s 2.5 s 4 s 2.5 s

t3n --- --- --- --- --- --- ---

t4 6 s 6 s 10 s 11.5 s 12.5 s 10 s 12.5 s

t4´ 6 s --- 10 s 11.5 s 15 s 10 s 15 s

t5 4 s 3 s 10 s 11.5 s 12.5 s 10 s 12.5 s

t6 10 s 14.5 s 12 s 17 s 15 s 12 s 15 s

t7 2 s 3 s 2 s 3 s 2.5 s 2 s 2.5 s

t8 30 s 29 s 65 s 69 s 74 s 95 s 103 s

t9 2 s 3 s 2 s 3 s 5 s 2 s 5 s

t10 6 s 6 s 8 s 11.5 s 10 s 8 s 10 s

t11 Optional

t12 Optional

t13 10 s 14.5 s 12 s 17 s 15 s 12 s 15 s

t16 4 s 3 s 4 s 6 s 5 s 4 s 5 s

t20 32 s 60 s --- 26 s 22 s --- ---

LGK16...

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Accessories (to be ordered separately)

Oil burner controls, without plug-in base

For AC 230 V* Control sequence and

connection diagram like

Preferred use

LOK16.140A27* LAL2.14 Flash-steam generators

LOK16.250A27* LAL2.25 Universal application

LOK16.650A27 LAL2.65 Heavy-oil burners

* For burner controls operating on AC 100...110 V, 50...60 Hz, the last 2 digits of the

type reference read «17» in place of «27»

Connection accessories

for medium-capacity

burner controls

Plug-in base AGM16

Article no.: BPZ:AGM16

- with Pg11 thread for cable entry glands

Plug-in base AGM16.1

Article no.: BPZ:AGM16.1

- with M16 thread for cable entry glands

see Data Sheet N7230

Flame detectors Photocell detectors RAR9...

see Data Sheet N7713

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Accessories (to be ordered separately) (cont‘d)

Gas burner controls, without plug-in base

For AC 230 V* Control sequence and

connection diagram like

Preferred use

LGK16.122A27* LFL1.122 Flash-steam generators

LGK16.133A27 LFL1.133 Flash-steam generators

LGK16.322A27* LFL1.322 Also suited for direct-fired

air heaters

LGK16.333A27* LFL1.333

LGK16.335A27* LFL1.335

LGK16.622A27* LFL1.622

LGK16.635A27* LFL1.635

* For burner controls operating on AC 100...110 V, 50...60 Hz, the last 2 digits of the

type reference read «17» in place of «27»

Connection accessories

for medium-capacity

burner controls

Plug-in base AGM17

Article no.: BPZ:AGM17

- with Pg11 thread for cable entry glands

Plug-in base AGM17.1

Article no.: BPZ:AGM17.1

- with M16 thread for cable entry glands

see Data Sheet N7230

Flame detectors Flame detectors QRA53.../QRA55...

see Data Sheet N7712

Ionization probe

to be supplied by thirds

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