Siemens LMO14 Series User manual

CC1N7130en

22.08.2013

Building Technologies Division

Infrastructure & Cities Sector

130

Oil Burner Controls

LMO14...

LMO24...

LMO44...

Microcontroller-based oil burner controls for the startup, supervision and control

of forced draft oil burners in intermittent operation. Standard versions with an oil

throughput up to 30 kg / h, special versions above 30 kg / h.

The LMO14..., LMO24..., LMO44... and this Data Sheet are intended for use by

OEMs which integrate the burner controls in their products.

Use, features

The LMO... are designed for the startup and supervision of 1- or 2-stage forced draft oil

burners in intermittent operation. Yellow-burning flames are supervised with photo

resistive detectors QRB..., blue-burning flames with blue-flame detectors QRC...

In terms of housing dimensions, electrical connections and flame detectors, the LMO...

are identical with the LOA... oil burner controls.

-Oil burners with fans to EN 267

-Burner controls for use with atomization oil burners of monoblock design to

DIN EN 230:2005-10

-LMO44... for use with stationary direct-fired air heaters

-Undervoltage detection

-Electrical remote reset

-Bridging contact for oil preheater

-Monitoring of time for oil preheater

-Accurate and reproducible control sequence thanks to digital signal handling

-Controlled intermittent operation after 24 hours of continuous operation

-Limitation of the number of repetitions

-Multicolor indication of fault status and operational status messages

Use

General features

Distribuitor: FLAME POWER SRL 021-3121727 ; 0744-340566 [email protected] ; www.arzatoare.ro

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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!

xAll activities (mounting, installation and service work, etc.) must be performed by

qualified staff

xBefore 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

xEnsure protection against electric shock hazard by providing adequate protection

for the burner control’s connection terminals. If this is not observed, there is a risk

of electric shock

xEach 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». If not observed, there is a risk of

impairment of safety functions and of electric shock hazard

xPress the lockout reset button / operation button or the AGK20… lockout reset

button extension only manually (applying a force of no more than 10 N) without

using any tools or pointed objects. If not observed, there is a risk of impairment

of safety functions and of electric shock hazard

xFall 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 not observed, there is a

risk of impairment of safety functions and of electric shock hazard

xWhen replacing LOA26... or LOA36..., any ARK21... remote lockout reset module

or similar modules fitted in the burner or boiler must be removed. If not observed,

there is a risk of impairment of safety functions

Mounting notes

xEnsure that the relevant national safety regulations are complied with

Installation notes

xAlways run the high-voltage ignition cables separately while observing the greatest

possible distances to the unit and to other cables

xInstall switches, fuses, earthing, etc., in compliance with local regulations

xEnsure that the maximum permissible amperages will not be exceeded (refer to

«Technical data»)

xDo not feed external mains voltage to the control outputs of the unit. When testing

the components controlled by the burner control (fuel valves, etc.), the LMO... may

never be plugged in

xDo not mix up live and neutral conductors

Electrical connection of the flame detectors

It is important to achieve practically disturbance- and loss-free signal transmission:

xNever run the detector cable together with other cables

– Line capacitance reduces the magnitude of the flame signal

– Use a separate cable

xObserve the maximum permissible lengths of the detector cables (refer to

«Technical data»)

ARK21...

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Building Technologies Division CC1N7130en

Infrastructure & Cities Sector 22.08.2013

Commissioning notes

xWhen 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 and maintain

that state

Repetition followed by lockout at

the end of safety time (TSA)

Standards and certificates

Conformity to EEC directives

- Electromagnetic compatibility EMC (immunity)

- Low-voltage directive

2004/108/EC

2006/95/EC

ISO 9001: 2008

Cert. 00739

ISO 14001: 2004

Cert. 38233

Type

Identification code to EN 230:

LMO14...

F M L L X N

LMO24...

F M L L X N

LMO44...

F M L L X N to WLE

Service notes

xUse the KF8885 / KF8833 / KF8840 service adapters for short periods of time only

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 in the 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.

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Mechanical design

The housing is made of impact-proof, heat-resistant and flame-retarding plastic.

It is of plug-in design and engages audibly in the base. Burner controls LMO... are

designed in black plastic.

The housing accommodates the

-microcontroller for the control sequence and the print relays for load control

-electronic flame signal amplifier

-lockout reset button with its integrated multicolor signal lamp (LED) for operational

status and fault status messages and the socket for connecting the OCI400

interface or the AGK20... lockout reset button extension

-Multicolor indication of operational status and fault status messages

-Transmission of operational status and fault status messages and detailed service

information via additional OCI400 interface and ACS400 / ACS410 PC software

Type summary

Type reference Mains

voltage

Fuel

valve

stages

Burner

capacity

¹) Remote

reset

Times Comparable type of

LOA... 4)

max.

t1 / t1´

min.

TSA

max.

min.

t3n

max.

min.

Standard versions

LMO14.111C2 AC 230 V 1 <30 kg/h x x 2.5 s 15 / 16 s 10 s 15 s 10 s --- LOA24.171B27

LOA26.171B27 ²)

LOA36.171A27 ²)

LMO14.113C2

AC 230 V

<30 kg/h

x x

2.5 s

15 / 16 s

10 s

15 s

3 s

---

LOA24.173A27 ³)

LMO24.111C2 AC 230 V 2 <30 kg/h x x 2.5 s 15 / 16 s 10 s 15 s 10 s 15 s LOA24.171B27

LOA26.171B27 ²)

LOA36.171A27 ²)

LMO24.111C1

AC 120 V

<30 kg/h

x x

2.5 s

15 / 16 s

10 s

15 s

10 s

15 s

LOA24.171B17

LMO24.255C2

AC 230 V

</> 30 kg/h

x x

2.5 s

25 / 26 s

5 s

25 s

5 s

15 s

---

Version for flash-steam generators

LMO24.011C2

AC 230 V

<30 kg/h

x x

2.5 s

5 / 6 s

10 s

5 s

10 s

15 s

LOA24.571C27

Suited for direct-fired air heaters

LMO44.255C2

AC 230 V

</> 30kg/h

x x

2.5 s

25 / 26 s

5 s

25 s

5 s

LOA44.252A27

TSA

Ignition safety time

Waiting time

Prepurge time

t1’

Purge time

Preignition time

t3n

Postignition time

Interval from flame signal to release of fuel valve 2 (BV2)

¹)

Bridging contact for oil preheater

²)

No actuator (SA) function

³) In case of replacement, ignition transformer must be rewired from terminal 7

(LOA...) to terminal 6 (LMO...)

4) LMO... can replace LOA..., but the instructions given in the Data Sheet, other

technical documentation and the specification must be followed

Indication and

diagnostics

Legend

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Building Technologies Division CC1N7130en

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Ordering

Oil burner control (without plug-in base) refer to «Type summary»

Connection accessories for small burner controls refer to Data Sheet N7201

-Plug-in base AGK11...

-Cable holders AGK65..., AGK66

Flame detectors

-Photo resistive detectors QRB1... refer to Data Sheet N7714

-Blue-flame detectors QRC1... refer to Data Sheet N7716

Interface OCI400 refer to Data Sheet N7614

Interface between burner control and PC

Facilitates viewing and recording setting parameters on site in connection with the

ACS400 / ACS410 PC software

PC software ACS400 refer to User Documentation J7350

PC software for visualizing the burner controls

PC software ACS410 refer to User Documentation J7352

PC software for setting the parameters and for visualizing the burner controls

Demo case KF8891 refer to User Manual B7989

-For demonstrating the functions of burner controls

Test adapter KF8885 refer to Operating Instructions B7986

-For checking the functions of burner controls on the burner

-With switch for manual startup of the burner

-With switch for simulating the oil preheater’s release contact

-With 2 pairs of jacks for measuring the flame detector current

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

Extension of lockout reset button

-Extension 19 mm: AGK20.19

-Extension 43 mm: AGK20.43

-Extension 55 mm:

AGK20.55

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Building Technologies Division CC1N7130en

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Technical data

Mains voltage AC 230 V +10 % / -15 %

AC 120 V +10 % / -15 %

Mains frequency

50...60 Hz ±6 %

External primary fuse (Si)

6.3 A (slow)

Power consumption

12 VA

Perm. mounting orientation

Optional

Weight

Approx. 200 g

Safety class

I (burner control with plug-in base)

Degree of protection

IP40 (to be ensured through mounting)

Perm. cable lengths

Max. 3 m at a line capacitance of 100 pF/m

Detector cable laid separately

10 m

Remote reset laid separately

20 m

Perm. current at cos

M t

0.6

LMO14...

LMO24...

LMO44...

Terminal 1

Max. 5 A

Terminals 3 and 8

Max. 3 A

Terminals 4 and 5

Max. 1 A

Terminal 6

Max. 1 A

Max. 2 A

Terminal 10

Max. 1 A

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

-20...+60 °C

Humidity

<95 % r.h.

Operation

DIN EN 60721-3-3

Climatic conditions

Class 3K3

Mechanical conditions

Class 3M3

Temperature range

-LMO14... / LMO24...

LMO44...

-5...+60 °C

-20...+60 °C

Humidity

<95 % r.h.

Attention!

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

Environmental

conditions

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Technical data (cont´d)

Detector current

required

(with flame)

Perm. detector

current

(without flame)

Possible detector current

with flame

(typically)

QRB... ¹)

Min. 45 µA

Max. 5.5 µA

100 µA

QRC... ¹)

Min. 45 µA

Max. 5.5 µA

70 µA

Detector current in operation:

- Flame signal instable

- Green LED flashing

Detector current in operation:

- Flame signal stable

- Green LED steady on

QRB...

¹) <45 µA >45 µA

QRC... ¹)

<45 µA

>45 µA

¹) The values given in the table above only apply under the following conditions:

- Mains voltage depending on execution AC 120 V or AC 230 V

- Ambient temperature 23 °C

QRB... QRC...

11 LMO...

µA DC

QRB...

7130v01/0700

11 LMO...

swbl br

µA DC

QRC1...

7130v02/0700

Legend

µA DC DC microammeter

with an internal

resistance of

Ri = max. 5 k:

bl Blue

sw Black

br Brown

As an alternative to detector current measurement, the Interface OCI400 / with PC

software ACS400 / ACS410 can be used. In that case, the DC microammeter is not

required.

Flame supervision with

QRB... or QRC...

Green LED for

operational status

indication

Measuring circuit

for detector current

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Function

xBurner control is reset

xReset button «EK1» or «EK2» not used

xAll contacts in the line are closed and there is demand for heat

xNo undervoltage

xFlame detector is darkened and there is no extraneous light

xSafety shutdown from the operating position takes place should mains voltage drop

below about AC 165 V (UN= AC 230 V) or AC 75 V (UN= AC 120 V)

xRestart is initiated when mains voltage exceeds about AC 175 V (UN= AC 230 V)

or AC 95 V (UN= AC 120 V)

If the oil preheater’s release contact does not close within 10 minutes, the burner control

will initiate lockout.

After no more than 24 hours of continuous operation, the burner control will initiate

automatic controlled shutdown followed by a restart.

If lockout occurs, the outputs for the fuel valves, the burner motor and the ignition

equipment will immediately be deactivated (<1 second). In the event of lockout, the

LMO... remains locked and the red signal lamp (LED) will light up. The burner control can

immediately be reset. This state is also maintained in the case of mains failure.

Cause

Response

Mains failure

Restart

Voltage has fallen below the undervoltage

threshold

Safety shutdown, followed by restart

Extraneous light during prepurge time (t1), 5

s before fuel valve (BV1) release

Lockout at the end of prepurge time (t1)

Extraneous light during waiting time (tw) Prevention of startup, lockout after 40

seconds at the latest

No flame at the end of safety time (TSA) Lockout at the end of safety time (TSA), blink

code 2

Loss of flame during operation

Max. 3 repetitions, followed by lockout

Oil preheater’s release contact does not

close within 10 minutes

Lockout

When lockout occurs, the burner control can immediately be reset. To do this, press the

lockout reset button for about 1 second (<3 seconds). The LMO... can only be reset when

all contacts in the line are closed and when there is no undervoltage.

If the flame is lost during safety time (TSA), the burner will be reignited, but only until the

end of safety time (TSA). This means that several ignition attempts can be made during

safety time (TSA) (see Control sequence).

If the flame is lost during operation, a maximum of 3 repetitions can be made. If the

flame is lost for the fourth time during operation, the burner will initiate lockout. The

repetition count is restarted each time controlled switching on by control thermostat or

pressurestat (R) takes place.

Preconditions for

startup

Undervoltage

Time supervision

oil preheater

Controlled intermittent

operation

Control sequence in

the event of fault

Resetting the

burner control

Ignition program with

LMO14.113x2 and

LMO24.113x2

Limitation of repetitions

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Operation, display, diagnostics

7130z05/0700

Lockout reset button «EK» is the key operating element for resetting

the burner control and for activating / deactivating the diagnostic

functions.

LED

7130z06e/0700

Red

Yellow

Green

The multicolor signal lamp (LED) in the lockout reset button is the key

indicating element for both visual diagnostics and interface diagnostics.

Both «EK» and LED are located under the transparent cover of the lockout reset

button.

There are 2 diagnostic choices:

1. Visual diagnostics: Operational status indication or diagnostics of the cause of

fault.

2. Interface diagnostics: With the help of the interface OCI400 and PC software

ACS400 / ACS410 or flue gas analyzers of different makes.

Visual diagnostics:

In normal operation, the different operating states are indicated in the form of color

codes according to the color code table given below.

During startup, status indication takes place according to the following table:

Color code table for multicolor signal lamp (LED)

Status

Color code

Color

Waiting time «tw», other waiting states

........................................

Off

Oil preheater on

........................................

Yellow

Ignition phase, ignition controlled

z  z  z  z  z  z

Flashing yellow

Operation, flame o.k.



........................................

Green

Operation, flame not o.k.

         

Flashing green

Extraneous light on burner startup

SSSSS

Green-red

Undervoltage

zSzSzSzSz

Yellow-red

Fault, alarm

.......................................

Red

Error code output (refer to «Error code

table»)

SSSS

S

Flashing red

Interface diagnostics

Red flicker light

......

Steady on

Red



Off

Yellow



Green

Operation

Operational status

indication

Legend

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Building Technologies Division CC1N7130en

Infrastructure & Cities Sector 22.08.2013

Operation, display, diagnostics (cont´d)

After lockout, the red signal lamp (LED) remains steady on. In that condition, the visual

diagnostics of the cause of fault according to the error code table can be activated by

pressing the lockout reset button for more than 3 seconds. Pressing the reset button

again for at least 3 seconds, the interface diagnostics will be activated. Interface

diagnostics works only if the AGK20… lockout reset button extension is not fitted. If, by

accident, interface diagnostics has been activated, in which case the slightly red light of

the signal lamp flickers, it can be deactivated by pressing again the lockout reset button

for at least 3 seconds. The instant of switching over is indicated by a yellow light pulse.

The following sequence activates the diagnostics of the cause of fault:

> 3 s

Flashing

xxxxxxxx

Error code table

> 3 s

Interface diagnostics

PC / analyzer

OCI400

< 3 s

7130z04e/0602

Reset

Visual diagnostics

Lockout position Lockout position Lockout position

Error code table

Red blink code of signal

lamp (LED)

Alarm

(AL) at

term. 10

Possible cause

2 blinks On No establishment of flame at the end of safety

time (TSA)

- Faulty or soiled fuel valves

- Faulty or soiled flame detector

- Poor adjustment of burner, no fuel

- Faulty ignition equipment

3 blinks

Free

4 blinks

Extraneous light on burner startup

5 blinks

Free

6 blinks

Free

7 blinks

Too many losses of flame during operation

(limitation of the number of repetitions)

- Faulty or soiled fuel valves

- Faulty or soiled flame detector

- Poor adjustment of burner

8 blinks

Time supervision oil preheater

9 blinks

Free

10 blinks Off Wiring fault or internal fault, output contacts,

other faults

During the time the cause of fault is diagnosed, the control outputs are deactivated

burner remains shut down.

The diagnostics of the cause of fault is quit and the burner switched on again by

resetting the burner control. Press the lockout reset button for about 1 second (<3

seconds).

Diagnostics of the

cause of fault

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