Siemens LMO14 Series User manual

CC1N7130en

31.07.2000

Siemens Building Technologies

Landis & Staefa Division

ISO 9001

7130

Oil Burner Controls LMO14...

LMO24...

LMO44...

Microcontroller-based oil burner controls for the supervision, start-up and con-

trol of forced draught oil burners in intermittent operation. Oil throughput up to

30 kg / h with the LMO14... and LMO24..., and above 30 kg / h with the LMO44...

The LMO14..., LMO24..., LMO44... and this data sheet are intended for OEMs

which integrate the burner controls in their products.

Use The LMO... burner controls are designed for the start-up and supervision of single- or 2-

stage forced draught oil burners in intermittent operation.

Yellow-burning flames are supervised with photoresistive detectors QRB..., blue-

burning flames with blue-flame detectors QRC...

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

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

- Forced draught oil burners conforming to EN 267

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

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

ing to EN 230

- Detection of undervoltages

- Electrical remote reset

- Contact for oil pre-heating

- Monitoring of time for oil pre-heating

- Accurate and reproducible program sequence thanks to digital signal handling

- Controlled intermittent operation after 24 hours of continuous operation

- Limitation of the number of repetitions

- Multicolour indication of fault and status messages

Application-specific

features

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Warning notes

To avoid injury to persons, damage to property or the environment, the following

warning notes should be observed!

Do not open, interfere with or modify the unit!

•Before performing any wiring changes in the connection area of the LMO..., com-

pletely isolate the burner control from the mains supply (all-polar disconnection)

•Ensure protection against electric shock hazard by providing adequate protection

for the burner control’s terminals

•Check wiring and all safety functions

•Press the lock-out reset button only manually (applying a force of no more than

10 N), without using any tools or pointed objects

•Fall or shock can adversely affect the safety functions. Such units may not be put

into operation, even if they do not exhibit any damage

Mounting notes

•Ensure the relevant national safety regulations are complied with

Installation notes

•Installation and commissioning work must be carried out by qualified staff

•Observe the permissible lengths of the detector cables (refer to «Technical data»)

•Always run the ignition cables separately while observing the greatest possible

distances to the unit and to other cables

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

•Ensure the maximum permissible amperages will not be exceeded (refer to «Tech-

nical data»)

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

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

never be plugged in

•Make certain the live wires are correctly connected

Commissioning notes

•Commissioning and maintenance work must be carried out by qualified staff

•When commissioning the plant, when doing maintenance work, or after longer off

periods, make the following safety checks:

Safety check Anticipated response

a) Burner start-up with flame detector dark-

ened Lock-out at the end of «TSA»

b) Burner start-up with flame detector ex-

posed to extraneous light Lock-out after no more than

40 seconds

c) Burner operation with simulated flame

failure; for that purpose, darken the flame

detector during operation and maintain

that status

Restart followed by lock-out at

the end of «TSA»

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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.

The housing accommodates the

- microcontroller, which controls the program sequence, and the relays for load con-

trol

- electronic flame signal amplifier

- lock-out reset button with its integrated 3-colour signal lamp for status and fault

messages and the socket for connecting the interface adapter OCI400

- Multicolour display of status and fault messages

- Transmission of status and fault messages as well as detailed service information

by additional interface adapter OCI400 and PC Windows software ACS400

Type summary

TimesType reference Mains

voltage Fuel

valve

stages

Burner

capacity Oil pre-heater

contact Remote

reset tw

max. t1

min. TSAm

ax. t3

min. t3n

max. t4

min.

Comparable

type of

LOA...

Standard versions

LMO14.111A2 AC 230 V 1 < 30 kg / h ••5 s 16 s 10 s 15 s 10 s --- LOA24.171B27

LOA26.171B27

LOA36.171A27

LMO14.111A1 AC 110 V 1 < 30 kg / h ••5 s 16 s 10 s 15 s 10 s --- LOA24.171B17

LMO14.113A2 AC 230 V 1 < 30 kg / h ••5 s 16 s 10 s 15 s 3 s --- LOA24.173A27

LMO24.111A2 AC 230 V 2 < 30 kg / h ••5 s 16 s 10 s 15 s 10 s 15 s LOA24.171B27

LOA26.171B27

LOA36.171A27

LMO24.111A1 AC 110 V 2 < 30 kg / h ••5 s 16 s 10 s 15 s 10 s 15 s LOA24.171B17

LMO24.113A2 AC 230 V 2 < 30 kg / h ••5 s 16 s 10 s 15 s 3 s 15 s LOA24.173A27

Version for flash-steam generators

LMO24.011A2 AC 230 V 2 < 30 kg / h ••5 s 6 s 10 s 5 s 10 s 15 s LOA24.571C27

Version for direct fired air heaters WLE

LMO44.255A2 AC 230 V 2 > 30 kg / h ••5 s 26 s 5 s 25 s 5 s 5 s LOA44.252A27

TSAmax. Maximum ignition safety time

tw Waiting time

t1 Pre-purge time

t3 Pre-ignition time

t3n Post-ignition time, maximum until the end of «TSAmax»

t4 Interval from flame signal to the release of «BV2»

Display and diagnosis

Legend

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Ordering

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

Electrical connections refer to data sheet 7201

- Plug-in base AGK11

- Cable holders AGK65, AGK66, AGK67...

- Cable tension relief elements for AGK67...

Flame detectors

- Photoresistive detectors QRB1... refer to data sheet 7714

- Blue-flame detector QRC1... refer to data sheet 7716

Diagnostic tool refer to data sheet 7614

- Interface adapter OCI400

- PC Windows software ACS400

Test case, for making functional tests KF8843

Test adapter KF8833

- With signal lamps for program indication

- With one pair of jacks for measuring the flame detector current

Test adapter KF8840

- With signal lamps for program indication

- With holes for checking the control voltages at the tabs of the burner control

- With on / off switch for simulating the flame signal

- With one pair of jacks for measuring the flame detector current

Test adapter KF8885

- With switch for manual start-up of burner

- With switch for simulating the oil pre-heater’s release contact

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

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Technical data

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

AC 110 V +10 % / -15 %

Mains frequency 50...60 Hz ±6 %

External primary fuse (Si) 5 A (slow)

Power consumption 12 VA

Mounting orientation optional

Weight approx. 200 g

Degree of protection IP 40

Perm. cable lengths max. 3 m at a line capacitance of 100 pF/m

Detector cable laid separately 20 m

Remote reset 20 m

Max. perm. amperage at

cos ϕ≥0.6 LMO14... LMO24... / LMO44...

Terminal 1 5 A 5 A

Terminals 3 and 8 3 A 5 A

Terminals 4, 5, 6 and 10 1 A 1 A

Transport IEC 721-3-2

Climatic conditions class 2K2

Temperature range -30...+70 °C

Humidity < 95 % r.h.

Operation IEC 721-3-3

Climatic conditions class 3K5

Mechanical conditions class 2M2

Temperature range

- LMO14... / LMO24...

- LMO44... -5...+60 °C

-20...+60 °C

Humidity < 95 % r.h.

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

CE conformity

According to the directives of the European Union

Electromagnetic compatibility EMC 89 / 336 EEC incl. 92 / 31 EEC

Low voltage directive 73 / 23 EEC

QRB...

Type reference

Min. detector current

required (with flame)

Max. detector current

permitted

(without flame)

Max. possible with

flame (typically)

LMO14...

LMO24...

LMO44...

45 µA 5.5 µA 100 µA

QRC...

Type reference

Min. detector current

required (with flame)

Max. detector current

permitted

(without flame)

Max. possible with

flame (typically)

LMO14...

LMO24...

LMO44...

70 µA 5.5 µA 100 µA

General unit data

Environmental

conditions

Norms and standards

Flame supervision with

QRB... and QRC...

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Function •Burner control is reset

•All contacts in the line are closed

•No undervoltage

•Flame detector is darkened, no extraneous light

•Safety shut-down in the operating position takes place should the mains voltage

drop below about AC 165 V

•Restart is initiated when the mains voltage exceeds about AC 175 V

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

will initiate lock-out.

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

automatic safety shut-down followed by a restart.

If lock-out occurs, the outputs for the fuel valves and the ignition will immediately be

deactivated (< 1 second).

Cause Response

After a mains failure Restart

After voltage has fallen below the undervoltage threshold Restart

In the event of a premature, faulty flame signal during «t1» Lock-out at the end of «t1»

In the event of a premature, faulty flame signal during «tw» Prevention of start-up, lock-out after no more than

40 seconds

If the burner does not ignite during «TSA» Lock-out at the end of «TSA»

In the event the flame is lost during operation Max. 3 repetitions, followed by lock-out

Oil pre-heater’s release contact does not close within 10 min. Lock-out

In the event of lock-out, the LMO... remains locked (lock-out cannot be changed), and the

red signal lamp will light up. This status is also maintained in the case of a mains failure.

Whenever lock-out occurs, the burner control can immediately be reset. To do this, keep

the lock-out reset button depressed for about 1 second (< 3 seconds).

If the flame is lost during «TSA», the burner will be reignited, but not later than at the

end of «TSAmax.». This means that several ignition attempts can be made during

«TSA» (refer to «Program sequence»).

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

flame is lost for the 4th time during operation, the burner will initiate lock-out. The repeti-

tion count is restarted each time controlled switching on by «R-W-SB» takes place.

QRB... QRC...

11 LMO...

µA DC

QRB...

7130v01/0700

1211 LMO...

bl br

µA DC

QRC1...

7130v02/0700

As an alternative to the detector current measurement, the diagnostic tool OCI400 /

ACS400 can be used. In that case, connection of the DC microammeter is not required.

Legend µA DC DC microammeter with an internal resistance of Ri = max. 5 kΩbl Blue

sw Black

br Brown

Preconditions for start-

Undervoltage

Time supervision oil

pre-heater

Controlled intermittent

operation

Control sequence in the

event of fault

Lock-out

Resetting the burner

control

Ignition program with

LMO14.113A2 and

LMO24.113A2

Limitation of repetitions

Measurement circuit for

detector current

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Operation, display, diagnostics

7130z05/0700

Lock-out reset button «EK...» is the key operating element for resetting

the burner control and for activating / deactivating the diagnostic func-

tions.

LED

7130z06e/0700

Red

Yellow

Green

The multicolour «LED» is the key indicating element for both visual

diagnosis and interface diagnosis.

Both «EK...» and «LED» are located under the transparent cover of the lock-out reset

button.

There are 2 diagnostic choices available:

1. Visual diagnosis: operational status indication.

2. Interface diagnosis: with the help of the interface adapter OCI400 and PC software

ACS400 or flue gas analyzers of different makes (refer to data sheet 7614).

Visual diagnosis:

In normal operation, the different operational statuses are displayed in the form of col-

our codes according to the colour code table. The interface diagnosis is activated by

pressing the lock-out reset button for at least 3 seconds (refer to data sheet 7614). If,

by accident, the interface diagnosis has been activated, in which case the slightly red

light of the signal lamp flickers, it can be deactivated by pressing again the lock-out

reset button for at least 3 seconds. The moment of switching over is indicated by a

yellow light pulse.

Operating position

> 3 s

Interface diagnosis

PC / analyzer

7130z01e/0800

Visual diagnosis

xxxxxxxx

Colour code table

Operating position

Colour code table

Status Colour code Colour

Oil pre-heater heats, waiting time «tw» ●●●●●●●●●●●Yellow

Ignition phase, ignition controlled ●❍●❍●❍●❍●❍●Yellow-off

Operation, flame o.k. ❏❏❏❏❏❏❏❏❏❏❏❏Green

Operation, flame not o.k. ❏❍❏❍❏❍❏❍❏❍❏Green-off

Undervoltage ●▲●▲●▲●▲●▲●Yellow-red

Fault, alarm ▲▲▲▲▲▲▲▲▲▲▲Red

Output of fault code (refer to «Fault

code table») ▲❍ ▲❍ ▲❍ ▲❍ ▲❍ Red-off

Extraneous light prior to burner start-

up ❏▲❏▲❏▲❏▲❏▲❏Green-red

Interface diagnosis ▲▲▲▲▲▲▲▲▲▲▲▲▲▲ Red flicker light

❍Off

●Yellow

❏Green

▲Red

Operation

Operational status indi-

cation

Legend

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Landis & Staefa Division 31.07.2000

After lock-out, the red fault signal lamp remains steady on.

In that condition, the visual diagnosis of the cause of fault according to the error code

table can be activated by pressing the lock-out reset button for more than 3 seconds.

Pressing the reset button again for at least 3 seconds, the interface diagnosis will be

activated (for more detailed information, refer to data sheet 7614).

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

> 3 s

Flashing

xxxxxxxx

Error code table

> 3 s

Interface diagnosis

PC / analyzer

OCI400

< 3 s

7130z04e/0800

Reset

Visual diagnosis

Fault position Fault position Fault position

Error code table

Blink code Possible cause

2 blinks

No establishment of flame at the end of «TSA»

- Faulty or soiled fuel valves

- Faulty or soiled flame detector

- Poor adjustment of burner, no fuel

- Faulty ignition

3 blinks

hhh

Free

4 blinks

hhhh

Extraneous light on burner start-up

5 blinks

hhhhh

Free

6 blinks

hhhhhh

Free

7 blinks

hhhhhhh

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

hhhhhhhh

Time supervision oil pre-heater

9 blinks

hhhhhhhhh

Free

10 blinks

hhhhhhhhhh

Wiring error or internal error, output contacts

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

- Burner remains shut down

- Fault status signal «AL» at terminal 10 is activated

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

the burner control.

Press lock-out reset button for about 1 second (< 3 seconds).

Diagnosis of cause of

fault

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Siemens Building Technologies CC1N7130en

Landis & Staefa Division 31.07.2000

Connection diagram and internal diagram

LMO14... LMO24... / LMO44...

126745

10 11 12

NMZBV1

83QRB

QRC

bl sw

7130a01e/0700

EK2

EK1 µC control

K1 K2

FSV

µC2

LED

kbr

µC1

126745

10 11 12

NMZBV1

83QRB

QRC

bl sw

7130a02e/0700

EK2

EK1 µC control

K1 K2

K3 K4

BV2

LED

kbr

FSV

µC2

µC1

Control sequence

LMO14... LMO24... / LMO44...

BV1

A´ AB C

t3n

TSA

7130d02e/0700

Only with LMO14.113A2: re-ignition t3n t3n

BV2

A´ AB C

t3n

TSA

7130d03e/0700

Only with LMO24.113A2: re-ignition t3n t3n

BV1 4

AL Alarm device OH Oil pre-heater

kbr... Cable link (required only when no oil pre-heater is used) QRB Photoresistive detector

BV... Fuel valve QRC Blue-flame detector

EK1 Lock-out reset button bl = blue

EK2 Remote lock-out reset button br = brown

FS Flame signal sw = black

FSV Flame signal amplifier R Control thermostat or pressurestat

K... Contacts of control relay SB Safety limit thermostat

LED 3-colour signal lamps Si External primary fuse

M Burner motor W Limit thermostat or pressure switch

OW Release contact of oil pre-heater Z Ignition transformer

t1 Pre-purge time t4 Interval from flame signal to release «BV2»

t3 Pre-ignition time TSA Ignition safety time

t3n Post-ignition time tw Waiting time for oil pre-heating

A´ Beginning of start-up sequence with burners using an oil pre- B Time of flame establishment

heater C Operating position

A Beginning of start-up sequence with burners using no oil pre- D Controlled shut-down by «R»

heater

Control signals µC1 Microcontroller 1

Required input signals µC2 Microcontroller 2

Legend

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Siemens Building Technologies CC1N7130en

Landis & Staefa Division 31.07.2000

Dimensions

Dimensions in mm

7,44

51,66

88,5

41,64

47,25

62,5

7130m02/0600

7130m01/0700

5,4

16,2

23,5

4,5

10,5

30 30

N31 32

123456789101112

62,5

Plug-in base with screw terminals

«A»: holes for the fixing screws

«B»: holes for the cable entry

«C»: earthing lug

«31» and «32»: auxiliary terminals

«N»: neutral terminals, connected to the neutral input

(terminal 2)

Underneath:

4 earth conductor terminals, joining in a lug for

earthing the burner

Hatched:

Position of cable gland holder AGK65 and cable

holder AGK66

Connection of earthing lug «C» and fixing screws in «A» to burner ground

→Use a metric screw with a lockwasher or similar!

LMO...

Plug-in base AGK11

2000 Landis & Staefa Produktion GmbH

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