Siemens LGI16 Series Bedienungsanleitung

CC1N7786en

07.08.2013

Building Technologies Division

Infrastructure & Cities Sector

7786

Burner Controls

LGI16...

Burner controls

•For use on industrial furnaces

•For burners in continuous operation

•Without fan control and air pressure supervision

•Flame supervision

- with QRA53... / QRA55…, flame detector

- with ionizations probe

•With self-supervising flame signal amplifier

•Quick startup

•1-stage operation with interrupted pilot burner or 2-stage operation

•Common or separate ionization probe and ignition electrode (single- or

double-electrode operation)

•Automatic restart (repetition) or lockout after loss of flame during operation

•Indication of program sequence

•Remote reset facility

•Programming mechanism in plastic housing, plugs into the base

The LGI16... and this Data Sheet are intended for use by OEMs which integrate

the burner controls in their products.

Use

Supervision and control of oil or gas burners for use on industrial furnaces that operate

continuously for longer periods of time (>24 hours) without controlled shutdown.

-QRA53... / QRA55... flame detector

-Ionization probe

-QRA53... / QRA55... flame detector and ionization probe together, e.g. with burner

with ignition burner, refer also to Data Sheet N7712

Flame supervision

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Building Technologies Division CC1N7786en

Infrastructure & Cities Sector 07.08.2013

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 disconnected,

there is a risk of electric shock hazard

•Ensure protection against electric shock hazard by providing adequate protection

for the burner control’s terminals

•Each time work has been carried out (mounting, installation and service work, etc.),

heck to ensure that wiring is in an orderly state and make the safety checks as

described in «Commissioning notes».

•Press the lockout reset button / operation 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

Mounting notes

•Ensure that the relevant national safety regulations are complied with

Installation notes

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

possible distances to the unit and to other cables

•Do not mix up live and neutral conductors

•Install switches, fuses and earthing, in compliance with local regulations

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

terminals will not be exceeded

Caution!

•Observe the polarity

Burner controls LGI16... are not able to detect wrong polarity of live and

neutral conductors

•When used in connection with UV detector QRA53... / QRA55..., terminal 22 must

be earthed

•For repetitive operation, remove wire link «J» between terminals 8 and 11 in base

AGM15

Warning!

•Danger - high voltage

In single-electrode operation, measurement of the ionization current is not

possible. During the ignition times, the ionization current path carries high

voltage.

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Building Technologies Division CC1N7786en

Infrastructure & Cities Sector 07.08.2013

Electrical connection of flame detectors

It is important to achieve practically disturbance-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 length of the detector cables (refer to «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 does not offer protection 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

•For cable lengths, refer to «Technical data», section «Detector and flame

supervision»

•Insulation resistance

– Must be a minimum of 50 MΩbetween ionization probe and ground

– Soiled detector holders reduce the insulation resistance, thus supporting

creepage currents

•Earth the burner in compliance with the relevant regulations; earthing the boiler

alone does not suffice

Commissioning notes

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

following safety checks:

Safety check

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 no more than 40

seconds

c) Burner operation with simulated loss of flame;

for that purpose, darken the flame detector

during operation

Restart followed by lockout at

the end of safety time (TSA) if

wire link (J) (terminals 8...11)

is removed, otherwise

immediate lockout

Standards and certificates

Conformity to EEC directives

- Electromagnetic compatibility EMC (immunity)

- Low-voltage directive

- Directive for gas-fired appliances

2004/108/EC

2006/95/EC

2009/142/EC

ISO 9001: 2008

Cert. 00739

ISO 14001: 2004

Cert. 38233

Identification code to EN 298 A B L / C L X K

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Building Technologies Division CC1N7786en

Infrastructure & Cities Sector 07.08.2013

Service notes

•UV detector current measuring unit KF8832 is not suited for continuous operation

Life cycle Burner control have 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 230 / 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.

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Building Technologies Division CC1N7786en

Infrastructure & Cities Sector 07.08.2013

Mechanical design

•Plug-in design

•Exchangeable unit fuse (including spare fuse)

•Impact-proof plastic housing

•Synchronous drive motor

•Lockout relay with electric, remote reset facility

•Self-supervising electronic flame signal amplifier with flame relay

•Program indication in the viewing window by means of disk on the spindle of the

sequence switch (refer to «Control and function diagram»

•Lockout warning lamp in the viewing window

•Reset after lockout by slightly pressing on the viewing window

•Printed circuit board with electronic components

•Programming mechanism with fixed settings

•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

Ordering

Burner control, without plug-in base

- AC 220...240 V LGI16.053A27

- AC 100...110 V LGI16.053A17

Plug-in base is not included in standard delivery, must be ordered as a separate item!

Accessories for medium-capacity burner controls refer to Data Sheet N7230

- Plug-in base AGM15 with Pg11 thread for cable entry glands

- Plug-in base AGM15.1 with M16 thread for cable entry glands

Flame detector

- UV detector QRA53... / QRA55… refer to Data Sheet N7712

- Ionizations probe supplied by the burner manufacturer

UV detector current measuring instrument KF8832

- Only for measurements of short duration

- Not suited for continuous operation

Caution!

The KF8832 negates the self-supervision function.

LGI16...

Housing

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Building Technologies Division CC1N7786en

Infrastructure & Cities Sector 07.08.2013

Technical 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 %

Unit fuse, built-in

T6,3H250, DIN EN 60 127 (5 x 20 mm)

External primary fuse

Max. 16 A, slow

Weight

Approx. 1,000 g

Power consumption

Approx. AC 3.5 VA

Perm. mounting position

Optional

Degree of protection IP40,

when fitted, with the exception of the

connection area (terminal base)

Safety class

Perm. input current at terminal 1

Max. 5 A (peaks of 20 A / 20 ms)

Perm. current load on control terminals

Max. 4 A (peaks of 20 A / 20 ms)

Required switching capacity of the switching

devices connected to terminals 4 and 5 Depending on the loads connected to

terminals 16...19

Min. 1 A, AC 250 V

QRA5x.C...

QRA5x.E...

QRA5x.D...

QRA5x.G...

Ionization probe

Operating voltage

AC 280 V ¹) ±10 %

AC 245 V ¹) ±10 %

Min. detector current required

DC 35 µA

DC 120 µA

DC 12 µA

Max. detector current possible

DC 50 µA

DC 270 µA

DC 100 µA

Short-circuit current

---

ca. AC 300 µA

Max. length of detector cable, laid separately

²)

60 m

Mounting position

Optional

---

Alternating current, measured with no detector current at AC 110V / AC 230 V mains

voltage.

Internal resistance of measuring instrument: 10 MΩ.

Shutter drive of UV detector QRA53... / QRA55… operates on mains voltage

•Detector cable laid at a distance of at least 50 mm from other mains carrying

cables:

– As a multicore cable: max. 50 m

– With 5 single wires: max. 70 m

•Detector cable laid directly adjacent to other mains carrying cables:

– With shielded 3-core control cable connected to pins 3, 4 and 5 of the

QRA53... / QRA55…; for the mains connection (pins 1 and 2), a normal mains

cable can be used max. 15 m

– With 3 screened 3-core coaxial cables (93 Ω; 45 pF/m) connected to pins 3,

4 and 5 of the QRA53... / QRA55…; for the mains connection (pins 1 and 2), a

normal mains cable can be used max. 60 m

– If possible, connect cable shielding at both ends of the cable

General unit data

Detector and flame

supervision

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Building Technologies Division CC1N7786en

Infrastructure & Cities Sector 07.08.2013

Technical data (cont'd)

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 60 721-3-2

Climatic conditions class 2K2

Mechanical conditions

class 2M2

Temperature range

-40...+60 °C

Humidity <95 % r.h.

Operation

DIN EN 60 721-3-3

Climatic conditions

class 3K5

Mechanical conditions

class 3M2

Temperature range

-20...+60 °C

Humidity

<95 % r.h.

Caution!

Condensation, formation of ice and ingress of water are not permitted!

Detector current measurement

Use the KF8832 measuring device (not suited for continuous operation).

There is no self-checking while measurements are made.

The KF8832 is not required when using the QRA5x.D... / QRA5x.G...

With QRA5x.C...

With QRA5x.D...

DC 35...50 µA

470 µF/25 V

7785v04/1008

DC 120...270 µA

470 µF/25 V

7785v01/1008

With QRA5x.E...

With QRA5x.G...

DC 35...50 µA

470 µF/25 V

7785v04/1008

DC 120...270 µA

470 µF/25 V

7785v01/1008

Environmental

conditions

LGI16... / QRA53... /

QRA55...

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Building Technologies Division CC1N7786en

Infrastructure & Cities Sector 07.08.2013

Detector current measurement (cont'd)

The measuring device must be connected between terminal 24 and the detector

electrode (+pole to terminal 24).

With ionization

24 ION

7785v03/1008

DC 12...100 µA

Burner control

LGI16... base

Burner

Terminals in the

burner compartment

QRA5...

Terminals in

the control panel

Mains cable 3 x 1.5 mm

Single-wire coaxial cable

(e.g. RG62)

Shielding

Max. 60 m

Cable AGM19

Ammeter

QRA5...

Flame detector

ION

Ionization probe

LGI16... / ionization

probe

Legend

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Building Technologies Division CC1N7786en

Infrastructure & Cities Sector 07.08.2013

Function When power is supplied to the burner control and the control loop (terminals 4 and 5) is

closed, the LGI16… will start the program sequence as shown in «Control and function

program», the most important program steps being the following:

•Waiting time

– No external function

– Internal flame simulation test

•Release of ignition

•Release of pilot gas valve

– Establishment of pilot flame during the first safety time (TSA)

– Release of gas valve stage 1

•Release of gas valve stage 1

– Establishment of pilot flame during the first safety time (TSA)

– Release of gas valve stage 2

– Establishment of main flame during the second safety time (t9)

•Burner operation

The burner control maintains its operating position and continuously checks the

presence of flame

•Shutdown

when the control loop between terminals 4 and 5 opens.

The signal to the gas valves will immediately be cut off.

During the time home run (t20), the programming mechanism returns to its start

position

•Flame signal on startup

causes the burner control to initiate lockout

•No flame signal at the end of the first or second safety time

causes the burner control to initiate lockout

•Loss of flame during operation

Wire link «J», between terminals 8...11 in the base

– Wire link fitted: burner control will initiate lockout

– Without wire link: burner control will automatically execute a restart (repetition)

Base AGM15 is supplied with wire link «J» fitted.

In the event of lockout, the signals to the gas valves will be cut off in less than one

second and the burner control locked.

Resetting is always to be made manually by pressing lockout reset button «EK1» or

«EK2».

In the case of repetition, the signals to the gas valves will also be cut off in less than

one second. Then, the programming mechanism will automatically return to its start

position (home run) to make a new start.

(Single-electrode operation, ionization probe, connected to terminal 7)

In the period between the ignition time (tz) and the end of the first safety time (TSA),

the secondary side of the ignition transformer is switched from earthing to the flame

signal amplifier.

Program sequence

Control program in the

event of fault

Common ignition probe

and ionization electrode

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Building Technologies Division CC1N7786en

Infrastructure & Cities Sector 07.08.2013

Control and function diagram

7786f01/0305

QRA5...

22 24

ION

FEZ

22 5 3 4 1

Z I

ZBV

EK2

P S F

TSA

twt3

t4t9

t5t20

1 2 21 3 4 5 16 17 18 19 11 8 7 22 23 15

BV1

BV2

Caution!

Do not press lockout reset button (EK...) for more than 10 seconds!

Legend

•

Valid for expanding flame burner

•• Valid for interrupted pilot burner

F Flame signal amplifier

P Programming mechanism

S Indication of program sequence in viewing window

TSA Ignition safety time 5 s ¹

)

tw Waiting time

4.5 s ¹)

tz Ignition time

2.5 s ¹)

t3 Preignition time

2.5 s ¹)

t4 Interval between start of release of the valve connected to terminal 17 or 18 and release of the valve connected

to terminal 19

7,4 s ¹)

Interval up to the self-shutdown of the programming mechanism in the operating position

t9 Transition time from pilot burner to main burner second safety time (2. safety time (t9) plus safety time in

operation)

3.5 s ¹)

t20 Home run time until the startup position after a controlled shutdown is reached

15 s ¹

)

1) Data valid at 50 Hz, at 60 Hz, the times are 20 % shorter

2) When used in connection with QRA53... / QRA55…, terminal 22 must be earthed

3) Connection with separate ignition electrode and ionization probe (double-electrode operation)

4) Connection with common ignition electrode and ionization probe (single-electrode operation)

Control signals of burner control at nominal voltage

Required input signal

Terminal connected to earth

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