ECB E10.14000.45 L-EUF, E10.12000.37 L-EUF Operating Manual

Operation Manual

for the authorized specialist

Dual-fuel Burner
E 10... L-EUF

06/2006 102.885.8162

2

Inhalt

Overview Important Information Warranty Product Description .......................................... 3

Technische Daten ................................................................................................. 4

Dimensioned Drawings ......................................................................................... 5

Start-up Mode Oil Operating Mode General Safety Functions .............................. 6

Fuel-air Compound Control ................................................................................... 7

Hydraulic diagram L-E... / GL-E... Burner E 10 ..................................................... 8

Hydraulic Valves and Instruments Group .............................................................. 9

Start-up Burner Head Settings .......................................................................................... 10

Installation Mounting to Boiler Electrical Connection Presetting ........................................... 11

Boiler Lining ........................................................................................................ 12

Burner GL/L-EUF ................................................................................................ 12

Oil Connection Oil Pressure Control (Feed) ........................................................ 13

Nozzle rod linkage 32 - EH ................................................................................. 14

Start-up Return Nozzle Rod RDG 1250 ............................................................................ 17

Nozzle selection „Sonic“ ...................................................................................... 18

Checking Procedure ............................................................................................ 19

Adjusting Instructions Air Flow Rate Adjusting Procedure ..................................................................... 20

Elektronic Burner Control with Electronic Compound Controller ......................... 21

Flame Detecting System Type FLW 05 .............................................................. 22

Servomotor Type SAD 15.0 ................................................................................ 23

Electrical Actuator STM 40 .................................................................................. 24

Starting the BCS, Etamatic, VMS/FMS Electronic Compound Controller ........... 25

Adjusting Instructions Oil Pressure Switch Air Pressure Switch ........................................................... 26

Overview Flame monitor ..................................................................................................... 27

Flame monitor ..................................................................................................... 28

Fan Impeller ........................................................................................................ 32

Service Instructions Maintenance Burner ............................................................................................ 33

Exhaust Gas Test ................................................................................................ 35

Trouble Shooting Instructions ............................................................................. 36

Operating Trouble ............................................................................................... 38

System Diagram .................................................................................................. 39

Product description Brenner E10.12000/14000 L-EUF ....................................................................... 40

Overview

3

Overview

Important Information
Warranty
Product Description

Important information

The burners of type E 10... L-EUF have
been designed for the combustion of
heavy fuel oil. The burners should be
installed and taken into operation care

­fully by qualified personnel. The work
should be done in accordance with the
applicable regulations and guidelines.
Only a duly authorized specialist should
be entrusted with the installation of the
gas system.
Any repair work on monitors, limiters
and automatic furnace controllers and
on the other safety facilities are allowed
to be done on the single items only by
the manufacturers themselves or spe

-

cialists authorized by them.
Original parts should only be exchan­ged by a duly qualified specialist.

Standards and regulations

The following standards should be
observed in the interest of a safe, easy­on-the-environment and energy-saving
operation of the burner:

EN267/
DIN4787

Oil Atomizing Bur­ners

VDE 0116 Electrical Equipment

of Furnaces

According to DIN 4755 the user must be
instructed in the operation of the fur

-

nace system.

For the installation of an oil furnace sys­tem, care should be taken to observe
DIN 4755, TRbF (Technical Regulation
on Combustible Liquids) and the local
furnace construction regulations appli

-

cable in the country.

Place of installation

The burner must not be operated in
rooms containing corrosive vapours
(e.g. spray, perchloroethylene, hydro

­carbon tetrachloride, solvent, etc.) and
tending to heavy dust formation and
only up to 60% relativ air humidity.

Adequate ventilation must be provided
at the place of installation of the furnace
system to ensure a reliable supply with
combustion air.

Maintenance

The furnace system should be serviced
at least once a year by an authorized
specialist. It is recommended to con

­clude a maintenance agreement to this
effect.

Warranty

Manufacturer will not accept any war­ranty if the operating instructions have
not been duly observed in the start-up
and maintenance of the burner and
damages have been caused by impro

­per installation, incorrect adjustment,
unauthorized interference or operating
errors.

Product description

The burners of type E10...L-EUF have
been designed as oil-burner for the
combustion of heavy fuel oil according
to DIN 51603-1.
They are fitted with a free-flame burner
head as a system to ensure low-NOx
combustion.

The burners are equipped with combu­stion air fan and air pressure switch with
test key, air box with actuator for the air
dampers, oil pressure-atomizer with
high-pressure oil pump, nozzle rod,
return nozzle, and oil hydraulic system
(with pressure switches, valves and
control shaft), pressure hoses, electrical
ignition system for the oil operating
mode.

The burners are designed for operation
with electronic compound control.

4

Technische Daten

Gas-Gebläsebrenner
E 10.12000/14000 G-EU2

LowNox mit Delta Brennkopf

Technical Data

Gas/light oil Forced Draught Burner

E10.12000/14000 L-EUF

Stand: 20.10.2005

Market Launch E10.14000 L-EUF Available not yet defined

Burner weight Approx . 650 kg plus 100 kg for transport rack
CE-Conformity No CE-Confirmity, Equipment for heat generator, Single audit necessary (see

manufacturer declaration), Homologation according European directives planned for
2006

Acoustic Emission - Sound Pressure < 97 dBA (average value on enveloping surface at 1 m distance)
Max. temperature of operating material max. 60°C (including impact from heat radiation)

Flame length max. at 3% O

2

5,9 m 6,4 m

Flame Diameter
(depends on NOx requirements)

1,3 - 1,6 m 1,4 - 1,75 m

Protection Class IP40, IP54 as option
NOx-Emissionen Emission Class 3 according EN267

Oil operation: 120-200 mg/kW h (0% O2 acc. EN267)
Detailed values on request

Oil connection High pressure pump 30 bar mounted on burner

approx. 2700 l/h; 4,0 kW approx. 4000 l/h; 5,5 kW

Fan motor 400/690 V, 50/60 Hz, 2950/3550 U/min, IP55

37 kW 45 kW

Operation Type Continuously modulating
Electronic Air-Fuel-Compound-Control
Automatic Firing Device

Etamatik OEM or BCS 300 on burner
Alternative electronic burner controls in separate cabinet

Fuels Fuel Oil EL
Max. control ratio
(FQ=frequency converter for motor)

1:3,5 bei Fuel oil EL 1:3,5 for Fuel oil EL

Deviating values on request

Low NOx with Free-Flame Combustion Technology
Electronic Fuel-Air-Control

E10.12000.37 L-EUF E10.14000.45 L-EUF

Combustion Power Output Fuel Oil EL: 1500 - 12.000 kW Fuel Oil EL: 1750 - 14.000 kW

Boiler Furnace Pressure According line of operation field and 10 mbars less.

Deviating values on request.

Operation Fields E10 L-EUF according EN 267

0

5

10

15

20

25

30

35

40

0123456789101112131415

Combustion Power Output [MW]

Boiler Furnace Pressure [mbar]

E10.14000.45 L-EUF E10.14000.45 L-EUF with FQ E10.12000.37 L-EUF

5

Overview

Dimensioned Drawings
EK 10... L-EUF

EK 10...L-EUF

The cover of motor is
removable in case of ope­ning boiler door for revi­sion

Drilling Template

Motor with disassembled protection grid

The air intake box can be rotated in
steps of 22,5 °C, the swivelling function,
however, is then not functional.

Note: In pecial cases, the air
intake box can be mounted in a
way that the opening shows to
another direction. The dimen­sioned drawing will the differ
slightly.

6

Operation

Start-up Mode
Oil Operating Mode
General Safety Functions

Start-up mode

As soon as the furnace system is requi­red to supply heat the burner control cir­cuit will close and the program be
started. After the program has run down
the burner will start.

The air damper is closed when the

burner is out of operation.

The automatic furnace controller con­trols and monitors the starting function.
The electric actuator opens the closed
air damper to its full-load position so
that the burner will sweep the furnace
compartment and exhaust ports at the
required air flow rates. Shortly after the
pre-ventilation process has been star

­ted the lack-of-air cut-out must change
over to operating position within a cer­tain time, i.e. the minimum air pressure
setting must be reached and maintained
until the burner is turned off. At the end
of the specified pre-ventilation time the
air damper will be moved into its partial­load position. This operation will be fol

­lowed by the pre-ignition procedure and
the oil feed start.

The solenoid valves will open and thus
allow the pressurized oil to flow to the
nozzle and to the return line. The oil will
be atomized, mixed with the combustion
air and ignited.
A safety period is provided to allow the
flame to develop a proper and steady
pattern. On the termination of the safety
period, a flame signal must have been
received by the automatic furnace con

­troller via the flame monitor and remain
on until the regular shut-off. The start­up program of the burner has now been
completed.

Oil operating mode

After flame formation, the burner will
shortly remain in the separately set igni­tion load, and is then run to minimum
output. Then the oil feed will start for
load regulation. The load regulator will
now control the burner automatically
between its partial-load and full-load
stages.

Depending on the heat rate required the
servomotor will via the controller be
given an "open" or "close" signal and
thus increase or decrease the oil and air
flow rates.

This compound control concept will vary
the position of the oil control valve and
air damper and thus adjust the oil flow
rate in relation to the air flow rate.
The stepless control will allow the bur­ner to be operated at any desired stage
between its partial-load and full-load
positions. The air damper will be closed
when the burner is out of operation and
will thus prevent cold air flowing through
the burner chamber, heat exchanger
and chimney. The interior cooling los

-

ses will be greatly minimized.

General safety functions

In case a flame does not develop when
starting the burner (fuel release) the bur­ner will shut off at the end of the safety
period (shut-off on trouble). A shut-off on
trouble will also occur in the case of flame
failure during operation, air flow failure
during the pre-ventilation phase and pres­sure failure during the whole period of bur­ner operation. Any failure of the flame
signal at the end of the safety period and a
flame signal during the pre-ventilation
phase (external light control) will result in
a shut-off on trouble with the automatic
furnace controller being lokked. Die Stö­rung wird am Display der elektronischen
Regelung und/oder wenn vorhanden
einer Störmeldelampe angezeigt.The

trouble is indicated by the trouble signal
lamp lighting up. The automatic furnace
controller can be unlocked immediately
after a shut-off on trouble by pressing the
unlocking key. The program unit will return
to its starting position and proceed with
the restart of the burner.
A voltage failure will result in a regular
shut-off of the burner. Upon voltage reco­very there may be an automatic restart
unless another interlock is provided, e.g.
by the safety system. In any case of
trouble the fuel oil supply will be shut off
right away. The program unit will stop at
the same time causing also the trouble
location indicator to stop. The symbols will
indicate the kind of trouble.

When using the burner control system
type BCS all operational and fault messa­ges may be indicated in plain text on an
optionally available operating and display
module.

When using the Etamatik/VMS/FMS
system, the display is located directly on
the control system, which is incorporated
in the boiler switch cabinet. In the Etama­tik OEM, the control system is located in
the electric module of the burner, and the
customer interface is also located on this
module or incorporated in the boiler switch
cabinet. In the Etamatik OEM, a pro­gramming unit could be installed as an
alternative to the customer interface.

sregulierung

ile

EIN

AUS

s

tellung

Leistungsregulierung

EIN

Gasventile
Zündung

Startlast
Teillast

Freigabe

AUS

Betriebsstellung

Vollast

Zündung/Ventile
Pumpe

Teillast

EIN

Freigabe

Leistungsregulierung

Betriebsstellung

Vollast

AUS

Oil control steepless Gas control steepless

ON OFF

ON OFF

Full load

Operating position

Load regulator

Release

Start load
Partial load

Ignition / gas valves

Full load

Operating position

Load regulator

Release

Partial load

Ignition/valves
Pump

7

Operation

Fuel-air Compound Control

Fuel-air compound control

This compound pneumatic control
system with precision-adjustment capa­bility has been designed to allow the
fuel and air flow rates to be steadily
varied in sliding mode for an adjustment
of the fuel-air ratio over the whole con

­trol range.
In the stepless control mode the load
will be controlled at any point within the
control range depending on the heat
demand.

Electronic compound control:

The air box includes an actuator for
operating the air damper. The oil control
valve incorporates an actuator for adju

­sting the return oil flow rate and thus the
output of the burner.
The actuators for the air and fuel flow
control will be operated depending on
output by the electronic compound con

­trol which will move them into the pro­grammed positions.

4

Luft

M

M

Öl
Öl

RL

VL

1a

1b

M

3

2

Oil feed

Oil return

Air

Electronic compound control

1a Oil control valve with actuator
1b Air dampers with actuators
2Burner
3Boiler
4 Combustion air fan

8

Hydraulic diagramm

120 Air damper
143 pressure gauge option
175 Filter
176 Pump
178 Feed solenoid valve
180 Nozzle rod
181 Return solenoid valve
184 Output control valve
187a Pressure regulating valve

(integrated in pump)
311 Return oil pressure switch
312 Feed oil pressure switch
349 Actuator

In case of TRD 604/72 hr control
items (pos. 311, 312) need to be
tested according to „special construc­tion design“ or must be installed twice.

312

RL

181

175

187 a

VL

176

311

178

178

M M

120

184

349

349

180

181

PI

143

PI

143

Hydraulic diagram -DIN / EN

RL

175

187 a

VL

176

311

312

178

178

181

180

181

M

184

120

M

349349

PI

143

PI

143

Hydraulic diagram -TRD 604/72 h

9

Operation

Hydraulic Valves and Instruments Group

The hydraulic valves and instruments
group is an integrated concept that
combines several functions of the
hydraulic systems of burners. Its modu

­lar construction makes it possible to
meet a wide range of requirements and
conditions of installation.
Depending on the level of equipment of
the hydraulic system, oil pressure swit­ches and pressure gauges (3) may be
installed in the supply and return pipes
of the basic module (1). The solenoid
valve in the supply pipe is of servo-assi

­sted type while the return valve is
directly controlled. The solenoids of the
two valves are electrically connected in
series which will prevent one of the val

­ves being opened alone if any of the
solenoids is defective. For the replace­ment of the solenoid valves during
maintenance work it should be ensured
that the right valve type is installed in
the correct direction of mounting. For
mounting the solenoid valve in the sup

­ply pipe (type 321F2523) it must be
ensured that the direction of flow shown
be a stamped arrow on the valve flange
is the same as the direction of flow of
the oil (from the pump to the nozzle

rod). The solenoid valve in the return
pipe (type 121 F2523) is marked with a
stamped arrow opposite to the direction
of the oil flow from the nozzle rod back
to the pump.The volume flow control
valve installed in the return pipe con

­sists of a bush pressed into the hydrau­lic valves and instruments group and
locked against torsion and a control
shaft. As the control shaft is turned, the
contoured configuration of the bush and
shaft will change the open cross section
for the oil flowing back and thus vary the
oil return flow rate. Control shafts with
different control contour parameters are
available for adjustment to various oil
nozzle sizes. This concept ensures that
an excellent control characteristic and a
wide control range can be covered for a
great variety of applications. The control
contour parameter is affixed to the con

­trol shaft by means of an electric mar­ker. The current position of the control
shaft is indicated by the position dis­play. From the "min." mark (low load of
burner) the control shaft will turn clock­wise to the "max." mark (full load of bur­ner). If the control shaft has been
removed during maintenance work care
should be taken when reinstalling it to
ensure the right mounting position of
the control contour by observing the
centre punch mark on the shaft end
face. In the low load position (min.) the
centre punch mark will in any case point
up (12 o'clock position - see figure).
If the hydraulic valves and instruments
group is used in conjunction with nozzle
rods not approved as safety shut-off
valve according to EN 264, an exten

-

sion module (2) is available which

incorporates an additional solenoid
valve each in the supply and return
pipes. The extension module is atta

­ched directly to the basic module. The
modules are sealed against each other
by O-rings.
Metal hoses are used for connection
between the hydraulic valves and
instruments group and the nozzle rod.
The hose lines must be protected
against exterior mechanical damage.
The hoses must be positioned and
mounted in accordance with the appli

­cable technical standards. For the
installation care must be taken not to
introduce torsional or buckling stresses
neither by the mounting procedure nor
by movements at a later stage. Speci

­fied bending radii of the hoses must not
be changed.

Basic module

Extension module

Control shaft installation

Complete hydraulic valves and
Instruments group

3

1

2

10

E 10.1200 L-EUF

Start-up

Burner Head Settings
E 10... L-EUF

11

Installation
Mounting to Boiler

Electrical Connection
Presetting

Adjustment electrical ignition
oil firing operation

Burner plate with gasket strip

Check before burner installation

Check the mixing unit for correct set­ting; see dimensioned drawing.

Burner head settings

The settings mentioned are factory set­tings.
They are understood to be recommen­ded values and may be readjusted
according to burner system conditions,
exhaust gas analysis and combustion
characteristics.

- Set the ignition electrodes according

to the sketch.

- Check the burner pipe mounting

according to Section “Boiler lining for
burners” and the boiler manufacturer’s
specifications.

Electric connection:

The electric connection including all
installation materials as well as joints
and earth terminals must be made in
accordance with the applicable regulati

­ons. For the electrical installation of the
burner reference should be made to the
circuit diagram of the furnace system.
The electric connection of the burner
and gas valves and instruments is allo

­wed to be entrusted to authorized spe­cialists only.

Burner installation

For mounting the burner to the boiler
make sure the connection plate is pre

­pared in accordance with the dimensi­ons given in the technical datasheets.

• Install the stud bolts in the connection

plate.

• Put the insulating base and burner in

place and fasten with bolts.

Arrangement of sealing tape on the
boiler

- Evenly stick on self-adhesive tape

according to Figure.

- Adapt the flat gasket by cutting to the

boreholes in the area of the four.
vertically arranged boiler fastening
holes.

- In case of butt joints make sure the

bordering is fitting closely

NOTE: For the installation of the con­necting cables care must be taken to
provide cable loops of sufficient length
so that the boiler door and burner can
be swung out as required.
After the completion of the electric con­nection work make a check of the wiring
of the burner electric system. This inclu­des a check for the direction of rotation
of the burner motor (fan).

Boiler inspection glass cooling

For cooling and cleaning the boiler
inspection glass, a cooling line (e.g. a
hose) may be installed from the burner
to the inspection glass. A connection
piece is provided on the burner for this
purpose.

12

Installation

Boiler Lining
Burner GL/L-EUF

Boiler lining

The burner lining must be installed at
right angles to the burner tube.

Possible trimming work (bevelling, roun­ding) as is required for reversing boi­lers, for example, should done at a
diameter not below 70 % of the combu­stion chamber diameter.

The space between the flame pipe of
the burner and the boiler lining should
be lined with heat resistant material,
such as Cerafelt.

This space is not allowed to be lined
with brickwork.

DF= Combustion chamber diameter

Burnertyp Dimension A Dimension T1 φ D φ D1

Standard 100 verl. 200 verl.

E 10 620 720 820 200 - 250 497 525

13

Installation

Oil Connection
Oil Pressure Control (Feed)

Oil connection

Hoses are used for connection to the oil
lines and stop valves. The hoses must
be installed according to the applicable
standards (relieved of tensile load, free
of distortion) to avoid kinking and
exclude the danger of breakage. Take
care when mounting the oil lines to
bring their ends as close to the burners
as possible and to arrange them in a
way that the boiler door and the burner
can be swung out without any obstruc

-

tion.
Refer to the technical documentation for
the line dimensions for the feed and
return lines from the stop valves to the
tank.

Oil filter

A filter must be installed upstream of the
pump to protect the oil pressure pump
and the hydraulic system.

Installation options

• Two-line installation
(separate feed and return lines without
delivery pump)

• Ring line system
(with delivery pump and gas-air sepa­rator)

Oil hose aplication area

Burner type DN length

[mm]

double sided

connection

bending radius

min. R [mm]

E 10 25 1500 R 1" 250

Instrument mounting

Prior to adjusting the burner make sure
to mount the test pressure gauges for
measuring the feed pressure (Item 2)
and return pressure (Item 1).

A vacuum gauge and pressure gauge
are mounted to the oil pump for measu

-

ring the oil pressure.

NOTE: After the burner has been taken
into operation the gauges must be
removed again and the connections
sealed with suitable means. If the gau

­ges are mounted to remain on the bur­ner they should be fitted with stop
valves.

Oil pressure control (feed)

The feed pressure is controlled by
means of the pressure regulator instal­led in the pump and should be set at
approx. 25 to 30 bar depending on bur

­ner output and nozzle make. The pres­sure regulator is operated by turning its
screw. Make sure to fill the pump with
oil prior to taking into operation.

Pump bleeding

Open the feed and return stop valves
and ensure the ring line (if any) is in
operation. Reduce the oil pressure at
the pressure regulating valve. Turn on
the pump by pressing the contactor.
Check the pump for proper direction of
rotation. Check for proper oil delivery
and absence of leaks in the hydraulic oil
system. For bleeding the pump open
the pressure gauge connection, for
example. When taking the burner into
operation proceed by gradually increa

­sing the pressure to operating level (25­30 bar).

Checking the pressure (oil suction
pressure)

The maximum permissible vacuum is

0.2 bar. At higher vacuum levels the fuel
oil will tend to gas evolution which may
lead to operating trouble. In the ring line
mode of operation the pump oil pres

-

sure is not allowed to exceed 5 bar.

1

2

14

General

The burner feed pipe 32-EH is particu­larly suited for mounting to oil burners
and is designed for the operation of
return plate nozzles with needle shut­off. The powerful spring of the driving
piston moves the shut-off needle into
closing position, thus always ensuring a
safe shut-off.

The driving piston is operated with oil
tapped from the supplied pipe, and its
opening function is controlled by the
solenoid valve of the hydraulic block.
The piston has a fixed travel.

The final position of the driving piston
can be checked hydraulically and incor

­porated into the control system of the
burner.

During the pre-ventilation of the burner,
the shut-off needle keeps the bore in
the nozzle plate closed and the oil circu

­lates in the feed pipe. When using
heavy fuel oil, the complete hydraulic
system is heated in the pre-scavenging
stage. When the solenoid is turned on,
or after a longer downtime, an imme

­diate atomizing and a perfect ignition
are ensured.

The burner feed pipe is suitable for sup­ply pressures from 20 to 40bar and oil
temperatures up to 140°C. The ambient
temperature in the vicinity of the coil
should not exceed a temperature of
60°C.

SW 41

SW 41

SW 41

swirl chamber plate

e

adapter

mounting

rod

Needle open Neddle closed

Nozzle plate

swivel nut

needle guidance

shut off needle

Nozzle rod linkage 32 - EH

Mounting the nozzle plates

The nozzle plate and the swirl chamber
plate should be installed according to
the attached sketch.
The sealing surfaces on the adapter, on
both sides of the swirl chamber plate
and on the nozzle plate must not be
damaged because this would endanger
the proper sealing. When sealing these
surfaces, never use material from other
manufacturers.

Remove the swivel nut from the feed
pipe, check that the needle guidance in
the swirl chamber plate is sliding pro­perly over the needle head and place
the plates into the nut evenly in proper
position and proper sequence.

Now the nut together with the plates is
carefully placed over the needle and
tightened by hand as firm as possible.
The cap nut is firmly tightened with a
spanner. Spanner surfaces are provi­ded on the adapter to counter with the
feed pipe when screwing down or off
the cap nut. These surfaces are desi­gned for this purpose only!

15

Nozzle rod linkage 32 - EH

Connections

The connections on the block of the
feed pipe are identified as follows:

S Oil supply to the nozzle and to the

hydraulic system of the needle
actuation. A filter with a mesh size
smaller than 50 µm should be pre­connected. The pressure should
be kept above 20bar.

MS Here, the supply pressure of the

nozzle is available. A pressure
gauge or a pressure sensor can
be connected to evaluate this
pressure.

R Oil return from the nozzle. A pres-

sure or a quantity governor can be
connected for fuel oil flow control.

MR Here the return pressure of the

nozzle is available. A pressure
gauge or a pressure sensor can
be connected to evaluate this
pressure.

L Oil return from the hydraulic

system of the needle actuation. In
principle, this oil should be allo­wed to flow off without back pres­sure. If this pipe is connected to a
ring main having a low overpres

­sure, it is essential to observe that
the pressure at connection „S“
must in any case be at least 20
bar higher than that pressure
which is applied at connection “L”.
Only then, the proper needle
function is ensured.

C Here, the switching pressure of

the needle piston is available. A
pressure gauge or a pressure
sensor can be connected to eva

­luate this pressure. The pressure
is lower than the pressure at con­nection “S” when the needle is
closed and during the switching
procedure of the needle piston.
Only during the time while the
needle is fully open, there will be a
pressure that is as high as the
pressure at connection “S”. These
properties allow the final position
of the needle to be checked
hydraulically.

When selecting the screwed connec­tions, make sure that the ducts in the
connecting block of the feed pipe can
not be covered, not even in part. Even a
partial covering of these ducts will result
in a malfunction of the feed pipe.

16

Nozzle rod linkage 32 - EH

Function

During the pre-scavenging stage, both
the external solenoid in the supply line
and the external quantity or pressure
governor in the return line are open.
The attached solenoid is de-energized
and the valve used for needle actuation
is closed, the spring-loaded rod thus
keeps the needle in the bore of the
nozzle plate at the front of the feed pipe
closed so that the oil cannot reach the
furnace chamber too early. The pres

­sure at connection “C” is 0 bar or equal
to the ring main pressure if the connec­tion “L” has been connected to a ring
main. The oil circulates from connection
“S” via the swirl chamber plate in the
nozzle through the feed pipe to the con

­nection “R”, thus warming it up to opera­ting temperature. (For heavy oil only)

Operating voltage and type of current
are indicated on the attached coil. The
moment the attached solenoid is turned
on, the oil is released for needle actua

­tion; the rod is withdrawn, and the
nozzle needle is opened. During the
short time where the piston moves from
closed to open needle position, the
pressure at connection “C” is always at
least 2bar lower than the pressure at
connection “S”. From the moment on
where the piston reaches its final posi

­tion and the needle is opened fully, a
pressure is applied at connection “C”
which is as high as the pressure at con

-

nection “S”.

The interruption of the power supply to
the attached solenoid causes the
needle to be closed by means of the
spring. The oil outflow on the nozzle will
stop immediately.

The pressure at connection “C” will go
down to 0 bar or reaches again the
same level as in the ring main if connec

­tion “L” is connected with the ring main.
The circulation from connection “S” via
the swirl chamber plate to connection
“R” will still take place. The temperature
of the feed pipe is thus maintained.

Service

Normally, the burner feed pipe is
maintenance-free.

The only moving part in the feed pipe is
the rod linkage used for actuating the
needle with the piston. After a longer
period, the O-rings could be worn out.
For replacement, complete O-ring sets
are available.

17

Start-up

Return Nozzle Rod RDG 1250

Function description

The return nozzle rod RDG 1250 is for
return nozzle without integrated needle
valve and comes with M14 screw con

­nection (for example Sonic DZ 1000,
CBM M14).The locking mechanism
consisted of a slider with seal ring (Pos.
2 and 6) in the forward flow section and
a needle valve (Pos. 5) in the return
flow section, using the sliding rod con

­trol by a hydraulic control-piston system
located at the back of the nozzle rod.
The opening pressure of RDG 1250 is
about 3 bar in forward flow section or 13
to 20 bar in return flow section. When
the solenoid valves are open, the pres

­sure from the oil would retract the con­trol-piston via the pressure channel
(Pos. 7) and then push open the slider .

Both the control-piston and sliding rod
with needle valve would remain open as
long as there is an existing oil pressure.
The same oil pressure would keep the
slider open. Under normal circum

­stances, both locking mechanisms
would open at the same time. The oil in
the forward flow section would exit
through the nozzle head to be mixed
with the air for combustion. The remai

­ning oil would be redirected through the
return holes of the nozzle back into the
return flow section of the nozzle rod
assembly. When it is not in operation,
the swirl plate in the nozzle head blocks
the return flow.The return oil flow rate
can be adjusted accordingly using a
pressure control valve If the pump pres

­sure is too low (<20 bar), thereby pre­venting the control needle from opening
all the way, variations in throughput are
to be expected as the needle position
will affect the return oil flow.

Control-piston opening distance H is set
in the factory at 9mm. Any adjustment
at installation site is not necessary.

1

5

3

6

4

7

2

H

The Control piston
opens at ca. 13 bar;
Fully open at 20 bar.
Close at 10 bar.

1 Return Nozzle
2 Slider
3 Spring (Forward)
4 Sliding rod
5 Needle valve
6 Seal ring (Forward)
7 Pressure channel
Distance H = 9 mm

Forward

Valve

18

Start up

Nozzle selection „Sonic“

160 kg/h

240 kg/h

300 kg/h

350 kg/h

400 kg/h

450 kg/h

500 kg/h

550 kg/h

650 kg/h

700 kg/h

750 kg/h

800 kg/h

850 kg/h

900 kg/h

950 kg/h

1000 kg/h

Diagram - of Sonic-Spray return nozzle DZ 1000-60°
with controlled return
Light fuel Oil
Feed pressure 28bar

Return nozzles of the type Sonic­Spray are available in different ratings
with an angle of spray of 45°, 60° or
80°.

The 45° nozzles are preferably used
for reversed-flow furnaces while the
60° and 80° nozzles are operated in
three-pass boilers and swirl-type
mixing installations, respectively.

Quantity Oil Nozzle [kg/h]

Return Pressure at the Hydraulicblock [bar]

19

Start-up

Checking Procedure

Check the following prior to the
initial operation of the boiler system:

• Take care to observe the operating
instructions supplied by the boiler
manufacturer. The boiler must be
mounted ready for operation.

• Ensure that the heating system is filled
with water to capacity.

• Check the complete system for correct
electrical wiring.

• Check the burner motor for correct
direction of rotation.

• Check for the proper setting of the
temperature and pressure controllers,
limiters, safety switches and electrical
limit switches.

• Bleed the fuel-carrying lines (make
sure they are free of air).

• Check tank, lines and oil pump are fil­led with oil and correct oil nozzle is fit­ted.

• Check the oil hydraulic system is free
of leaks.

• Check the exhaust gas ports are ope­ned and adequate fresh air intake is
ensured.

• With burner in starting position check
that air damper is in „CLOSED“ posi

-

tion.

• Check that automatic furnace control­ler is unlocked and in its original posi­tion.

Oil start-up

Open all shut-off valves of oil supply
system.

• Set fuel selector switch to its „Oil“ posi­tion.

• Fill pump with oil.

• Mount pressure gauge in the feed line
and return line.

• Mount the pressure gauge for
checking the pump suction pressure.

Bleeding

Shortly start the burner and check for
proper direction of rotation. Bleed the oil
line and oil pump.

CAUTION: The hydraulic system has
been filled with test oil by the manufac

­turer. This may cause ignition trouble
when initially operating the system. To
protect the pump, the oil pressure con

­troller is factory-set at zero pressure.
When starting the burner take care to
increase the oil pressure slowly to the
operating level.

Prior to the initial fuel feed start
make a functional test of the burner
program flow:

Oil system:

• Open all shut-off valves of the oil sup­ply system.

• The oil solenoid valve in the feed line
disconnect on the terminal strip (see
Circuit Diagram).

• Start burner and check program flow
for correct start-up sequence.

1. Fan starts.

2. Pre-ventilating damper.

3. Air pressure check.

4. Partial-load air damper.

5. Ignition.

6. Valves open (disconnected valve

remains closed).

7. Shut-off upon trouble after expiry

of safety period (see automatic
furnace controller).

• Reconnect the valve.

• Unlock the automatic furnace control­ler.

20

Adjusting Instructions

Air Flow Rate Adjusting Procedure

Adjusting procedure

• Set the selector switch to its "Manual"
or "Hand" position.

Air flow rate adjustment

The air control curve of the compound
controller is factory-set so that the air
damper is closed in minimum position
and open in maximum position.
The combustion air flow rate required
for proper fuel combustion is controlled
by an electronic fuel-air compound con

­trol system over the full load range. A
check is made by analyzing the exhaust
gases.

For the gradual adjustment of the
load points (fuel flow rate, air flow
rate), a procedure should be used as
described in the operating instruc

­tions for the electronic compound
control system.

A fuel test should be made at each point
if possible.

21

Adjusting Instructions

Elektronic Burner Control with
Electronic Compound Controller

BCS

Etamatic OEM

Refer to the documentation supplied
with the electronic compound control
system for the pre-operational work on
the burner, the checking requirements
(e.g. actuators, limit switches, potentio­meters etc.) and the instructions for the
initial operation of the electronic com­pound control system.

Etamatic

22

Adjusting Instructions

Start-up of Burner Control System Type BCS 300
Flame Detecting System Type FLW 05

Description

The electronic burner control system
type BCS 300 is a programmable auto­matic firing controller of modular con­struction with integrated electronic
compound controller. It is designed for
the control and automatic control of oil,
gas and dual-fuel burners of medium to
larger outputs.
The automatic firing controller may be
used for intermittent or continuous
mode of operation and for furnace
systems built according to TRD.
The controller consists of the following
units that communicate via a safety-ori­ented bus system:

- burner controller module type
BCS 300 (attached to burner)

- flame detector module type BCS­FLW 05 (attached to burner)

- fuel and air servomotors

- operating and display unit type
BAM (not required for operation of
furnace system)

The system also incorporates a PID
firing rate controller with standard or
servo-control parameterization capabi

-

lity and a valve leak tester.

Technical data:

Operating voltage: 230 V a.c.
Frequency: 50-60 Hz
Power input:

BCS incl. BAM:<15 VA

FLW 05: <1.5 VA
Back-up fuse: max. 10 AF
Equipment fuse: 6.3 A slow-blow

0.1 A slow-blow

Permissible ambient temperature:

in operation: 0 - 60 °C

during storage: -20 - 70 °C

Starting the burner control system

NOTE: The burner control system is

allowed to be started by duly qualified
specialists only. The personnel opera

­ting the system should strictly observe
the applicable instructions for start-up.

Before proceeding with the pro­gramming of the system make a check
of its wiring (especially for compliance
with the relevant DIN-VDE standards
and the regulations of the local power
supply company).

The parameterization of the automatic
firing controller programs, the valve leak
test and the firing rate adjustment will
be handled from the operating and dis

-

play module.

NOTE: For selecting the automatic con­troller programs and adjusting the pre­ventilation times care should be taken to
observe the applicable standards.
The fixed safety time settings are not
allowed to be extended by external swit­ching operations.

The fuel-air compound curves may be
programmed by means of the operating
and control module or a laptop compu

­ter.
If the compound controller is adjusted
by means of the operating and display
module it will only be possible to correct
the curve point settings.
A completely new curve and the defini­tion of new curve points can be achie­ved with the aid of a laptop computer
only.

After the automatic controller programs
have been set it will be possible to
check the inputs and outputs of the bur

­ner control system for proper
functioning via the operating and dis­play module.

NOTE: For the tests, all manual fuel
shut-off valves must be kept in closed
position in any case.

The compound modules are provided
with a basic curve when delivered ex
works. This may be changed by means
of the operating and control module to
adjust it to the local conditions. For this
purpose, it is possible to correct the
damper positions for the 10 index points
in the range from 10, 20, 30, etc. to 100.

Flame detecting system

The flame detector module type FLW 05
is used in conjunction with the burner
control system.
The following flame sensors may be
connected to the flame detector
module:

-QRA 2

- QRA 53/55

-RAR 7/8

- ionization electrode

- any flame detector with contact
output

The sensor to be used will be selected
by appropriate programming in the bur­ner control system. The type of sensor
used will depend on the burner opera­ting mode (continuous or intermittent).
The flame boosters integrated in the
flame detector will be checked for pro­per operation at an interval of 90
seconds in continuous mode.
Flame detectors with contact output
must if run in continuous mode be intrin­sically safe because only the parts of
the BCS flame detector are checked for
safe operation.

The intensity of the flame signals (UV
sensor, light sensor, ionization elec­trode) is evaluated in the burner control
system and indicated on the operating
and display module.
This allows an exact orientation of the
flame sensors.
It is not possible to measure the flame
intensity by means of instruments.

The flame sensors must be checked for
accumulation of dirt at regular intervals.
Take care that the sensor window is
kept free of dust all the time.
The flame intensity display may be used
as an indicator for the dirt accumulation
load.
If the situation cannot be remedied by
cleaning it will be necessary to replace
the flame sensor.

23

Adjusting Instructions
Start-up of Burner Control System Type

BCS 300
Servomotor Type SAD 15.0

The electronic compound control
system type BCS makes use of digitally
activated servomotors type SAD 15.0.
These consist of a stepping motor with
electronic trigger and power pack.
A driver with digital feedback via enco­der disk is provided for monitoring the
function and direction of rotation.
Take care to observe the instruction for
operation for the burner control system
type BCS 300.

Dimensions:

Connection:

P1 : N, L, PE

P2, P3 : 1 - EA SA

2 - EB SB
3 - OK WD
4 - GND
5 - AA MA
6 - AB MB

NOTE: Check the zero position of the
servomotors prior to start-up.

Technical documentation:

BCS 300, Dungs

Technical data:

Maximum torque 15 Nm
Gear reduction 745:1
Positioning times (at 200 Hz) 22.3s/90°
Positioning accuracy <±0.3°
Direction of rotation from zero mark to 90°counterclockwise (looking on drive

shaft)

Angular resolution stepping motor 0.02°

rotation monitoring 1°

Unidirectional positioning by external load

initial stress at 0.6 Nm

Supply voltage 230 V a.c. +10/-15%, 50 Hz
Current decrease 20 ms ±30% (after last step)
Protection classification IP 54
Shaft, flanged with cylindrical pin 12 dia.

h8

Ambient temperature in operation -20 to +60 °C

Cable gland with PG 11
conduit thread

and earthing

Through hole for M6 thread

P1

N L PE

P3 P2 zu

24

Adjusting Instructions

Technical data:

Voltage: 230V AC
Frequency: 50 Hz
Angle of rotation: 90°
Running time: 40 sec. for 90°
Torque: 15 Nm
Static holding
moment:

8 Nm

Dimensiones
(B x H x T):

(93 mm x 144 mm x 149 mm)

Potentiometer
(integrated):

5 kΩ

Electrical Actuator STM 40

The actuator STM 40 is used in connec­tion with the electronic burner control
systems (Etamatic (S), Etamatic OEM
(S), VMS, FMS) of the firm „Lamtec“ .

5 k

Ω

25

Start-up

Starting the BCS, Etamatic, VMS/FMS Electronic
Compound Controller

Starting the electronic compound
controller

For starting the electronic ratio control­ler make sure to proceed as described
in the operating instructions.

NOTE:

Only duly qualified personnel must be
employed for starting the controller.
For the initial operation make a check
that the controller settings are in line
with the furnace system requirements.
The configuration of the compound con

­troller is shown on the sticker attached
to the housing side wall.

Functional test without burner start

After the electronic compound controller
has been connected electrically pro­ceed with adjusting the potentiometers
of the actuators. Start the fan for
checking the feedback of the fan speed
(press the fan contactor).
As soon as the potentiometer feedback
data have been properly set proceed
with programming the compound con­troller. An exact description of the pro­gramming procedure can be found in
the operation manual supplied with the
compound controller.

NOTE:

The start-up manual of the compound
controller contains information on
trouble signals, detailed instructions for
start-up and for programming the con

-

troller.

26

Adjusting Instructions

Oil Pressure Switch
Air Pressure Switch

Oil pressure switch

Oil pressure switches are provided to
burners for monitoring the oil pressure.
Depending on the burner design, the oil
pressure switches can be installed eit­her in the return line only or in both the
return line and feed line. The cut-out
pressure will be selected depending on
the burner system data (ring line pres­sure, oil nozzle, etc.).

Oil pressure damper

An oil pressure damper or a capillary
pipe may be installed in the connection
fitting (2) to make up for oil pressure
variations.

Operating pressure adjustment

For adjusting the operating pressure,
remove the setting know (1) by pulling it
upward and reinstall it again the other
way round. After the adjustment has
been completed make sure to install the
setting know in its original position
again.

Switching difference

The switching difference may be selec­ted on the pressure switches within the
limits shown in the table. For the adjust­ment, turn the threaded pin in the set
screw (3) for the switching point. One
turn will change the switching difference
by approx. 20 % of the total range of the
switching difference. The oil pressure
switch has a facility for attaching a seal.

1

2

3

Typ e

Setting

range

Switching
difference

Location

DSB 143 F... 0 - 6 bar 0,3 - 1,6 bar Return line acc. to DIN / EN

DSB(F) 170 F... 15 - 40 bar 1,2 - 4,5 bar Feed line acc. to DIN/EN in pumps

without quick-action stop valve

DSF 146 F... 0 - 10 bar 0,5 - 2,5 bar Return line acc. to TRD 604/ 72h

DSB 158 F... 3 - 25 bar 1,0 - 4,3 bar Feed line acc. to TRD 604/ 72h

Air pressure switch

The air pressure switch is provided for
monitoring the pressure of the combu­stion air fan.
The pressure switch DL 50A has been
designed for switching on, off or over an
electric circuit in the case of changes of
the actual pressure levels from the set­point setting. The pressure switch DL
50A can be used as overpressure,
vacuum or differential pressure monitor
for air and non-aggressive gases but
not for gases according to DVGW
Worksheet G 260/l.

Determining the differential pre­flushing pressure and adjusting the
differential pressure switch

• Burner in the pre-aeration phase.

• Measure pressure on test

connection (2).

• Measure vacuum on test

connection (3).

• Add the measured pressures.

• Set the scale to 90% of the calculated
value.

Certification

The pressure switch has been tested in
accordance with DIN 3398 Part 2 and is
registered by CE/DIN-DVGW. It has
been registered in other important gas
consumption countries.

Switch function test

Test buttons are provided to check the
switch functions for proper operation
(with safety cut-out and interlock). The
burner is normally run in partial-load
condition when testing the safety
functions. On pressing button (4) the
vacuum will be removed which causes
the differential pressure to drop below
the required level. If it is necessary to
test the pressure switch functions under
full-load conditions this may be done by
pressing button (1).

27

Overview

Flame monitor

IR Flame Detector FFS 06

For IR flame detectors and UV flame
detectors, the minimum response thres

­holds are 15 mV AC and 25 mV AC,
respectively. Refer to the technical
documentations of the flame monitors
for further commissioning instructions.

Note: The UV flame detectors are not
provided with this sensitivity adjust­ment. They are optimized by aligning to
the flame to be monitored in the best
possible way using the measurable
signal voltage on the measuring line.

Criteria for flame detectors

Detector type spectral radiation range application - fuel

FFS 06 UV-1 260-400nm oil, gas

FFS 06 UV-2 210-380nm oil, gas (special gases such as

refinery and high furnace gases)

FFS 06 (IR) 1200-2800nm oil, gas, furnaces with heavy flue

gas recirculation, waste gases
with yellowish colouring without
UV radiation

Sensitivity

Adjustment to be made on switches
S1 and S2 which are accessible
after opening the detector housing.

factory
configur­ation

Figure 2

Assembling and commissioning of
flame detectors

The flame detector should be installed
in the provided mounting at an inspec­tion opening of the burner in a way that
the burner flame to be monitored is
clearly visible in the overall operational
range of the furnace. The sensitivity of
the IR flame detector FFS 06 to the bur­ner flame can be adapted via the thres­hold switch in the flame detector. In
doing so, the sensor housing should be
unscrewed and the setting on the thres­hold switches made according to the
Figure (2).

28

Overview

Flame monitor

Pin configuration

Connection of the flame detectors is
according to colour code in compliance
with the pin configuration on the flame
monitor to be used or the Etamatic /
BCS. The detector cable has a measu

­ring cable (pink) where the signal
voltage can be measured with a com­mercially available potential-free
measuring instrument (measuring resi

-

stance >5MΩ, e.g. a hand-held multi­meter in compliance with EN 61010).
The measurement used to ideally align
the flame detector FFS 06 to the flame
is relative to frame (blue) of the detector
line.

DURAG Compact Flame Monitor
D-LX 100

Function

After turning on, the compact flame
monitor will first undergo a self test and
then repeat the same during operation
at regular intervals. The radiation of the
flame is converted into an electric flame
signal using a highly sensitive photocell.
It is only the flaring portion of the flame
signal which is processed by the two
microprocessors of the compact flame
monitor D-LX 100. Thus, the monitoring
is independent of outside light, insofar it
is constant light. Depending on the set
operating point, the flame signal causes
the flame contact to switch. This opera

­ting point can be adjusted on the unit in
10 steps. The safety time can be fac

­tory-set to the values of 1, 3 or 5 sec. In
addition, the flame intensity determined
is made available on the measuring out

-

put as analogous value.

Application

The DURAG compact flame monitor D­LX 100 is the first flame monitor of its
kind. Its radiation detectors cover the
spectral range from 190 to 520nm. All
blue burning flames, such as gas or oil
flames, can be monitored with these
flame monitors. In particular, flames the
UV radiation of which are absorbed by
dust, water vapour or other substances,
and can therefore not be monitored with
conventional UV cells, are safely detec

­ted by means of the new highly sensi­tive UV semiconductors. This flame
monitors provided with the highly sensi­tive UV semiconductors have also pro­ven themselves in NOx-reducing
combustion techniques, such as the
waste gas recirculation.

Ultraviolet flame monitor
D-LX 100 UL / UA / UAF

The radiation detectors used in these
flame monitors cover a spectral range
from 190 to 520nm. All blue burning fla

­mes, such as gas or oil flames, can be
monitored with these flame monitors. In
particular, flames the UV radiation of
which are absorbed by dust, water
vapour or other substances and can,
therefore, not be monitored with con

­ventional UV cells, are safely detected
by means of the new highly sensitive
UV semiconductors.

This flame monitors provided with the
highly sensitive UV semiconductors
have also proven themselves in NOx­reducing combustion techniques, such
as the waste gas recirculation.

Infrared flame monitor
D-LX 100 IG / IS

Depending on type, the radiation detec­tors used for the IR flame monitors have
a spectral sensitivity between 300 and
1100nm or 780 and 1800nm. These
flame monitors are particularly suited for
the monitoring of yellow burning coal or
wood dust flames which contain no or
only very small UV radiation portions. IR
flame monitors are also well suited for
the monitoring of oil flames even if addi

-

tional substances are burned.

Figure 3

29

Overview

Flame monitor

Selenium Photocell Detector RAR …

Application

RAR… is used for the monitoring of yel­low burning oil flames.

WARNINGS:
When observing the following

warnings, unsafe conditions
hazardous to life, property
and environment can be
avoided!

It is not permitted to open the unit or
to make changes or modifications!

- Never do any work in the power sup­ply area without first disconnecting all
external power supplies.

- Provide for appropriate protection
against direct contact on the power
supplies.

- Before commissioning, check the
wiring and all safety functions.

- After being subjected to any impact
load, take these detectors out of ope

­ration as safety functions may be
affected even if there is no external
damage visible.

Assembling

- Observe the applicable local safety
regulations.

- Mount the detector to the burner by
means of snap-on fastening (can be
locked into place in light metal flange
attached to burner).

Installation

- Allow only qualified personnel to per­form the installation.

Electrical connection of detectors

Ensure a trouble-free and loss-free
signal transmission if possible:

- Never run the detector cable together
with other cables.

- Cable capacitance reduces the

size of the flame signal.

- Use a separate cable.

- Take care to observe the permissible
length of detector cables, see “Type
Overview”

- Always run the ignition cables with a
large distance to the unit and to other
cables if possible.

Commissioning

- Allow only qualified personnel to per­form commissioning and maintenance
work.

- The intensity of the light radiation on
the location of the detector is checked
by measuring the detector current.

Circuit for detector current measure­ment

A Incidence of light
M Micro-ammeter direct current,

internal resistance 5000 Ω

Refer to the data sheet of the respective
automatic furnace controller for mini

-

mum required detector current values.

Disposal

The detector contains electrical and
electronic components and must not be
disposed of as household waste. It is
essential to observe the local and appli

-

cable legal conditions and regulations.

Design

- Dust-proof TS plastics enclosure

- Photocell under protective glass

- Shipment optional with/without flange
and shackle, see “Type Overview”

Type Overview
Type Length of Detector Cable
Flange and Shackle

RAR7 up to max. 20m without
RAR7(1) up to max. 20m with
RAR8 up to max. 100m without
RAR8(1) up to max. 100m with

When ordering please state the type
designation according to type overview.

Technical Data

Class I
System of protection IP40
Any mounting position
Weight approx. 85g

Environment
Transpor t: IEC 721-3-2

Climatic conditions: class 2K2
Mechanical conditions: class 2M2
Temperature range: -20 to +60°C
Humidity: <95% relative humidity

Operation: IEC 721-3-3
Climatic conditions: class 3K5
Mechanical conditions: class 3M2
Temperature range: -20 to +60°C
Humidity: <95% relative humidity

Dewing, icing and ingress of water
are not permitted!
Function

In this monitoring mode, the radiation of
oil flames in the visible range of the light
spectrum is used for the formation of
the flame signal. The light-sensitive ele

­ment is a selenium cell. When lit, it deli­vers a direct voltage and thus causes
the current to flow to the input of the
flame signal amplifier. The RAR… is
thus an active detector. The cell is non­sensitive in the infrared area so that the
slightly glowing firebricks of the furnace
are not detected.

Dimensioned drawings

Dimensions in mm

30

Overview

Flame monitor

Flame Detectors QRA…
Flame detectors for Siemens auto­matic furnace controllers for the
monitoring of gas and oil flames

Application

The flame monitors are used for monito­ring gas flames, yellow and blue
burning oil flames as well as for ignition
spark inspections.

QRA2 intermittent operation
QRA53continuous operation

WARNINGS:

When observing the following
warnings, unsafe conditions hazar

­dous to life, property and environ­ment can be avoided!

- Never do any work in the power sup-

ply area without first disconnecting all
external power supplies.

- Provide for appropriate protection

against direct contact on the power
supplies.

- Check the wiring and all safety

functions.

- Halogen lamps, welding apparatus,

special lamps as well as the ignition
spark may have a sufficient high UV
portion so that the cell will ignite. X-ray
and gamma radiation may generate a
wrong flame signal as well.

Mounting

- Observe the applicable local safety

regulations.

Installation

- Allow only qualified personnel to per-

form the installation.

- Take care to observe the permissible

length of the detector cable, see
“Technical Data”.

- Always run the ignition cables separa-

tely keeping a large distance to the
QRA… and to other cables if possible.

Electrical connection of detector

Ensure a trouble-free and loss-free
signal transmission if possible:

- Never run the detector cable together

with other cables.

Cable capacitance reduces the

size of the flame signal.

Use a separate cable.

Commissioning

- Allow only qualified personnel to per­form commissioning and maintenance
work.

- A trouble-free burner operation can be
ensured only if the intensity of the UV
radiation on the location of the detec

­tor is still so large that it is ignited
safely during each half-wave.The
intensity of the UV radiation on the
location of the detector is checked by
measuring the detector current.

Measuring circuit for
QRA2 ..., QRA10...
and QRA5 series D

Legend

Measuring circuit for
QRA5 up to series C

1… Circuit of micro-ammeter between adapter QGQ1.../AGQ2...and flame
detector
A – Incidence of radiation
M – Micro-ammeter direct current internal resistance 5000 Ω
C – Electrolytic capacitor 100...470...µF,DC 10...25 V

Design

Flame detector QRA2…

Plastic-encapsulated design, metalli­zed to prevent a static charge in the air
flow of the blower, directly mounted on
burner. Shipment optional with/without
flange and shackle, see “Type Over

-

view”.

Flame Detector QRA 5

The UV cell is located behind a swivel­mounted shutter on the front end of the
detector pipe flanged onto the housing.
A quartz window protects the cell and
the shutter from contamination. The
detector housing contains a step motor
as shutter drive as well as the electronic
components for the shutter control.

Connector AGM19

Connector AGM19 with cable for the
electrical connection of the flame detec

-

tors QRA53… and QRA55…

Required minimum detector current
values:
See the respective data sheets of the
automatic furnace controllers or the
operator’s manual of the KF8832.

Disposal

The detector contains electrical and
electronic components and must not be
disposed of as household waste. It is
essential to observe the local and appli

-

cable legal conditions and regulations.

31

Type Overview Flame Monitor:

Typ sensitivity flange with shackle clamped cover spare UV cell
QRA2 without
QRA2(1 ) with
QRA 2.9 without
QRA 2.9(1) with
QRA2M without
QRA2M(1) with
QRA10.C normal 4 502 1131 0
QRA10M.C hight 4 502 4065 7

Typ sensitivity clamped cover clamped cover spare UV cell
QRA53.C27 AC 220…240 V
QRA53.C17 AC 100…110 V
QRA53.D27 AC 220…240 V
QRA53.D17 AC 100…110 V
QRA55.C27 AC 220…240 V
QRA55.C17 AC 100…110 V
QRA55.D27 AC 220…240 V
QRA55.D17 AC 100…110 V

normal

125 mm

4 502 4065 7

hight

normal

77 mm

hight

normal 4 502 1131 0

hight

4 502 4065 7

black

green

Note

All QRA5… will be supplied with
shackle. A connecting cable AGM19 is
required for connection (see “Accesso

-

ries” for QRA5…).

Technical Data

General Data

Average lifetime of UV cell:

- approx. 10,000h at max. +50°C, hig­her ambient temperatures will signifi­cantly decrease the lifetime.

System of protection

- QRA2… IP40

- QRA53…, QRA55 IP 54

Dimensioned drawings

All dimensions in mm

Mounting position: any

Transport: IEC 721-3-2

Climatic conditions: class 2K2
Mechanical conditions: class 2M2
Temperature range: -20 to +60°C
Humidity: <95% relativ

humanity

Operation: IEC 721-3-3
Climatic conditions: class 3K5
Mechanical conditions: class 3M2
Temperature range: -20 to +60°C
Humidity: <95% relative
humidity

Dewing, icing and ingress of water
are not permitted!

Function

In this monitoring mode, the UV radia­tion of gas and oil flames is used for the
formation of the flame signal. The radia­tion detector is a UV sensitive cell with
two electrodes which is ignited by radia
tion in the wave length range between
190 and 270nm, thus generating a cur

­rent in the flame detector circuit.
The UV cell does not respond to the
after-glowing firebricks of the furnace or
the daylight.

Overview

Flame monitor

incidence of radiation

shackle for direct mounting

32

Adjustment

Fan Impeller

Note:

Prior to removing the fan impeller, the
shaft or the fan impeller must be mar­ked on the edge of the suction funnel so
that the fan impeller is in the same posi­tion when reassembling, or the same
overlapping of the suction funnel
(dimension in Fig.) can be readjusted as
initially. An axial displacement of the
impeller on the shaft may result in a
lower efficiency, thus having a reduced
air flow.

Prior to removing the bush from the
disk, the position of the bush in the disk
must be marked so that a rotating
against one another can be prevented.
Rotating the bush deteriorates the
balance of the fan impeller.

To demount the impeller, remove the
screws (1) and (2), screw in one of them
as separating screw into the hole (3)
having half a thread in the bush and
tighten it.
This causes the bush to loosen. Open
the bush by means of a wedge if requi­red. Remove the loose impeller ran wit­hout striking a blow and without
damage by hand.

- Clean and degrease all bright-finished

surfaces. A requirement for achieving
a high slipping moment is always a
clean and fat free surface of all parts
to be fitted into one another.

- For reassembly: Place the disk and

the bush into their initial position (wit

­hout rotating) into one another, make
sure that the holes are congruent.

- Screw the bush into or out from the
disk until about 2..3 mm of the bush
are protruding.

- For new installation: Mark the dimen­sion x on the inside of the fan impeller.

- Mount the fan impeller onto the shaft.
For this, open the bush by means of a
wedge if required. Adjust the position
to maintain the dimension x using the
marking(s).

- Align the two opposing screws (1) and
(2) and tighten them evenly step by
step. In doing so, start with the first
step of the torque (max. 10 Nm) by
tightening one screw, then rotate the
fan impeller by half a rotation and tigh

­ten the other screw with the same tor­que, afterwards rotate the fan impeller
to the initial position. Increase the tor

­que by one step and proceed until the
specified torque is reached as descri­bed above. The torque steps should
not be larger than 10 Nm.

- check the dimension X.

The following torques must be follo­wed:

SM 25, Bushes No. 2517 – centre bore
42 and 48 mm:

Torque: 50 Nm.
WM30 Bushes No.3030 – centre bore
48 mm:

Torque: 90 Nm.

Overlapping of suction funnel above
fan impeller:

Burner X [mm]

E10 6

33

Service Instructions

Maintenance Burner

Furnaces should be inspected once
a year. An extract from DIN 4755,
4756 reads as follows:

„To ensure a high operational readi­ness, functionality, safety and eco­nomic efficiency, the user should
have the boiler system inspected by
an authorized person of the manu­facturer or other specialist once a
year. The whole system must be
checked for proper operation and
faults detected should be rectified
without delay. It is advisable howe

­ver to make another inspection of the
system in addition to the one speci

­fied herein.“ The inspection should
comprise the following work:

1. Inspect the boiler internals and

insulating packages and replace
by new ones if required. Check
boiler for possible accumulation of
dirt.

2. Remove the nozzle, check it and

replace it by new one if required.

3. Clean the ignition electrodes.

4. Check the ignition electrode and

spark functions and readjust if
required.

5. Clean the burner interior and exte-

rior.

6. Clean the fan impeller.

7. Check the fan impeller for possi-

ble deformation and cracks.

8. Clean the UV flame sensor.

9. Clean the filters and screens.

10. Check the electrical connections.

11. Check the burner head setting.

12. Check the control equipment for

proper operation, setting and
safety period.

13. Check the pressure switch for pro-

per setting and operation.

14. Check the oil pump by measuring

its pressure and vacuum levels.

15. Check the hydraulic oil system for

absence of leaks.

16. Check the oil hoses for possible
damage and twisting.

17. Clean the air damper and check
for smooth operation.

18. Check the combustion process
and make exhaust gas tests:

• Fuel throughput rate adjustment

• Heating chamber temperature

(intake temperature)

• Exhaust gas temperature

• Pressure in combustion

chamber and exhaust gas pipe

•CO2 and O2 contents of exhaust

gases

• CO test, soot test

• UV sensor current measurement

19. Enter measured data in test
record.

Note: Before doing maintenance and
adjusting work:

- Disconnect the external power sup-

ply. Turn the main switch to the OFF
position.

- Close all shut-off valves upstream the

burner.

Swivelling out and closing the air
intake box

The air intake box is swivelled out as
follows:

- Loosen the plug connectors of the

power supply and the return line (1) on
the servomotor of the air damper.

- Pull off the hose of the air pressure

detector (3) from the nipple on the air
intake box (5).

- Screw out the screws (6) to (9).

- Swivel out the air intake box.

1

3

5

7

8

9

6

34

Service Instructions

Maintenance Burner

Should there be not enough space,
such as in double furnace tube boilers,
the air intake box can also be easily
taken off its hinges after screwing out
the fastening screws and a slight
swivelling.

The air intake box is closed in reversed
order of the steps described above.

Note: When mounted the hinge is no
fastening point. It is merely used to
accommodate the air intake box in open
state and as an aid upon screwing on.
The actual fastening is by the four
screws.

Removing and closing the casing
cover

Before removing the casing cover do
the following steps:

- Swivel out or disassemble the air
intake box.

The casing cover is removed as follows:

- Screw out the screws (1) to (6).

- Remove the casing cover.

When closing the casing cover do the
following steps:

- Screw in the screws (1) to (6) by doing
only a few turns.

- Tighten the screws beginning with the
screws (1) and (2), followed by the
screws (3) and (4) and finally by the
screws (5) and (6).

Assembling and disassembling the
flame monitor

Before disassembling the flame moni­tor, do the following steps:

- Swivel out the air intake box.

- Remove the casing cover.

Assembling and disassembling the
nozzle rod linkage

Before disassembling the nozzle rod lin­kage, do the following steps:

Swivel out the air intake box.
Remove the casing cover.

The nozzle rod linkage is disassembled
as follows:

- Open all quick-release couplings of
the oil pipes (10).

- Loosen the fastening screw (11) of the
nozzle rod linkage.

- Pull off the nozzle rod linkage togehter
with swirler (12) and centering device
(13).

The nozzle rod linkage is reassembled
in reversed order.

11

10

12

13

2

3

6

5

1

4

4

3

2

1

35

Exhaust Gas Test

Exhaust gas test

To ensure an economically efficient and trouble-free
operation of the system it will be necessary to
adjust the burner specifically in accordance with the
furnace system. This is achieved by means of a
fuel-combustion air compound control unit which
adjusts the burner to ensure a proper combustion.
Exhaust gas tests are required for this purpose.
The percentage CO

2

and O2 and the exhaust gas

temperature will have to be measured to determine
the efficiency and combustion quality.
Prior to any measurement make sure to check the
boiler and exhaust gas system for absence of
leaks.

Secondary air will falsify the measured results

Check that the exhaust gases have a residual oxy­gen (O2) content as low as possible and a carbon

dioxide (CO

2

) content as high as possible.

The carbon monoxide content of the exhaust gases
must be below the currently applicable specificati

­ons in all load stages.
In the fuel oil combustion mode the permissible
soot number in the exhaust gas is not allowed to be
exceeded.

Ratio between O2- and CO2- for
light oil EL (CO

2

max =15,40%)

% O

2

% CO2 % O2 % CO2

0,00 15,40 3,00 13,19
0,10 15,33 3,10 13,12
0,20 15,25 3,20 13,04
0,30 15,18 3,30 12,97
0,40 15,11 3,40 12,89
0,50 15,03 3,50 12,82
0,60 14,96 3,60 12,75
0,70 14,88 3,70 12,67
0,80 14,81 3,80 12,60
0,90 14,74 3,90 12,53
1,00 14,66 4,00 12,45
1,10 14,59 4,10 12,38
1,20 14,52 4,20 12,31
1,30 14,44 4,30 12,23
1,40 14,37 4,40 12,16
1,50 14,29 4,50 12,08
1,60 14,22 4,60 12,01
1,70 14,15 4,70 11,94
1,80 14,07 4,80 11,86
1,90 14,00 4,90 11,79
2,00 13,93 5,00 11,72
2,10 13,85 5,10 11,64
2,20 13,78 5,20 11,57
2,30 13,71 5,30 11,49
2,40 13,63 5,40 11,42
2,50 13,56 5,50 11,35
2,60 13,48 5,60 11,27
2,70 13,41 5,70 11,20
2,80 13,34 5,80 11,13
2,90 13,26 5,90 11,05

O221

CO

2max

CO

2gem

–

CO

2max

-----------------------------------------------

× %==

O

2

21

CO

2max

CO

2gem

–

CO

2max

-----------------------------------------------

× %==

Ratio between O2- and CO2- for
heavy oil (CO

2

max =15,90%)

% O

2

% CO2 % O2 % CO2

0,00 15,90 3,00 13,63
0,10 15,82 3,10 13,55
0,20 15,75 3,20 13,48
0,30 15,67 3,30 13,40
0,40 15,60 3,40 13,33
0,50 15,52 3,50 13,25
0,60 15,45 3,60 13,17
0,70 15,37 3,70 13,10
0,80 15,29 3,80 13,02
0,90 15,22 3,90 12,95
1,00 15,14 4,00 12,87
1,10 15,07 4,10 12,80
1,20 14,99 4,20 12,72
1,30 14,92 4,30 12,64
1,40 14,84 4,40 12,57
1,50 14,76 4,50 12,49
1,60 14,69 4,60 12,42
1,70 14,61 4,70 12,34
1,80 14,54 4,80 12,27
1,90 14,46 4,90 12,19
2,00 14,39 5,00 12,11
2,10 14,31 5,10 12,04
2,20 14,23 5,20 11,96
2,30 14,16 5,30 11,86
2,40 14,08 5,40 11,81
2,50 14,01 5,50 11,74
2,60 13,93 5,60 11,66
2,70 13,86 5,70 11,58
2,80 13,78 5,80 11,51
2,90 13,70 5,90 11,43

O221

2max

CO

2gem

–

CO

2max

-----------------------------------------

× %==

36

Exhaust Gas Test

Trouble Shooting Instructions

Exhaust gas loss

Exhaust gas loss by way of free heat
will occur as a result of the temperature
difference between the fuel-air mixture
entering the furnace chamber and the
gases discharged. Any increase in the
excess of air and the resultant higher
exhaust gas volume will cause the
exhaust gas loss to rise. The exhaust
gas loss can be calculated as follows:

q

A

tAtL–()

A

1

CO

2

-----------

B+

⎠

⎞

⎝

⎛

⋅=

q A = exhaust gas loss in %
t A = exhaust gas temperature

in °C

t L = combustion air temperature

in °C

CO2= volumetric content of carbon

dioxide in %

Example:
Data measured in fuel oil mode:
CO2 content of exhaust gases 12,8%

Exhaust gas temperature 195°C
Air intake temperature 22°C

The exhaust gas loss can be calculated
as follows:

Light oilELHeavy oil

S

A

1

= 0,50 0,490

B = 0,007 0,007

In any case of trouble proceed with
checking the basic conditions for a
proper operation of the boiler
system:

1.Is electric power available?

2.Is fuel oil contained in the tank?

3.Are the shut-off valves opened?

4.Are all control and safety instruments

such as boiler thermostat, water
supply failure cut-out, limit switches,

etc. properly set?

1. Ignition failure

Cause Remedy

Ignition elec­trode short cir­cuit.

Adjust
electrodes.

Wide ignition
electrode
spacing.

Adjust
electrodes.

Dirty and wet
electrodes.

Clean
electrodes.

Cracked
insulator.

Replace
insulator.

Defective igni­tion transformer.

Replace
transformer.

Defective auto­matic furnace
controller.

Replace
controller.

Burnt ignition
cable.

Replace cable;
search for cause
and eliminate.

Pilot burner
failure.

Adjust ignition
gas pressure

Ignition gas
valve does not
open.

Search for
cause and elimi­nate

Defective
solenoid.

Replace

2. Motor running failure

Cause Remedy

Motor protection
relay and fuses.

Check and
replace if
required.

Air pressure
switch not
changed over or
defective.

Check and
replace if
required.

Defective motor. Replace motor.
Defective power

contactor.

Replace
contactor.

Air fan motor
starts but stops
after 20-25 secs.

Check for
solenoid leaks

Air fan motor
starts, but stops
after about 10
secs in pre-venti­lating mode.

Air pressure
switch fails to
change over;
replace switch if
defective; clean
switch if dirt has
accumulated;
check electrical
connections.

3. Pump oil delivery failure

Cause Remedy

Shut-off valves
closed.

Open valves.

Filter blocked by
dirt.

Clean filter or

replace cartridge.
Filter leaks. Replace filter
Oil lines leak. Retighten scre-

wed unions; tigh-

ten oil lines.
Suction valve

leaks.

Remove and

clean or replace.
Direction of rota-

tion of pump.

Check irection of

rotation.
Damaged gear-

box.

Replace pump.

Reduced pump
output.

Replace pump.

-Strong mechanical noise.
Pump takes in air Retighten scre-

wed unions.
High vacuum in

oil pipe

Clean filter; fully

open valves.
For heavy oil:

Incorrect oil tem­perature.

Check pre-hea-

ter:

thermostat set-

ting, dirt

37

Trouble Shooting Instructions

8. Cleaning and lubricating
instructions

Depending on the amount of dirt intro­duced by the combustion air it will be
necessary to clean the fan impeller,
ignition electrodes, flame sensors and
air dampers as required.

For burner with mechanical compound
controller:
Lubricate the ball heads of the com­pound controller setting screws with
grease.

The bearing points of the burner moving
parts require no maintenance.
Damages of ball bearings should be
detected and eliminated at an early
stage to avoid greater subsequent
trouble. Listen to the motor bearing
noise to identify possible irregularities.

4. Unsteady atomization

Cause Remedy

Loosened
nozzle.

Tighten nozzle

Hole partly clog­ged.

Remove and
clean or replace.

Worn by long­time use.

Replace by new

one.
Oil flow blokkage
Due to clogged

nozzle.

Remove and

clean.
Nozzle leaking. Replace nozzle.
Shut-off valve in

nozzle rod lea­king.

Replace valve.

5. No response to flame by
automatic furnace controller
with flame sensor

Cause Remedy

Dirty flame sen­sor.

Clean flame

sensor.
Burner fails to

start.

Check

connection of

automatic fur-

nace controller.
Trouble lamp

lights; flame
trouble.

Unlock and

search for cause

Weak flame sen­sor signals.

Check combus-

tion setting.
Burner starts

without flame
formation.
Solenoid valve
fails to open.

Defective coil or

rectifier.

Check connec-

tion.

6. Mixing unit gives poor com­ bustion data due to heavy inside
accumulation of oil or coke

Cause Remedy

Incorrect set­tings.

Correct settings.

Incorrect mix­ture ignition unit.

Replace unit.

Nozzle too large
or too small.

Replace nozzle.

Incorrect angle
of spray.

Replace nozzle.

High or low com­bustion air flow
rate.

Readjust burner.

Furnace cham­ber not suf­ficiently
ventilated.

Furnace cham­ber to be ventila­ted through a
non-closed ope­ning with a cross
section of min.
50 % of all chim­ney cross sec­tions of the
furnace system.
Take care to
observe the
application regu­lations.

7. Solenoid valve fails to open

Cause Remedy

Defective coil. Replace coil.
Defective auto-

matic furnace
controller.

Replace auto­matic furnace
controller.

Valve does not
close tightly; dirt
accumulated on
sealing surfaces.

Open valve;
remove foreign
matter; replace
valve if required.

38

Servicing Instructions

Operating Trouble

In case of operating trouble it should
be checked whether the system is in
proper working order.

Make a check for the following:

1.Availability of fuel. Availability of fuel
oil in the tank.

2.Availability of electric power in the
burner system.

3.Proper functional order and setting of
all control and safety instruments such
as temperature controller, safety
limiter, water failure cut-out, electrical
limit switches, etc. If the trouble is not
found to be due to any of the above­mentioned points it will be necessary
to test the burner functions very
carefully.

Prevailing conditions:

The burner will be found to be out of
operation and in faulty and interlocked
position.

Proceed with searching for the cause of
the trouble and eliminate it. Unlock the
automatic furnace controller by pressing
the fault eliminate key and start the bur­ner.

Do not press the fault eliminate key
longer than 10 seconds.

The start-up program will be initiated
and should be carefully monitored.
The possible cause of the fault may be
quickly found by reference to the fault
indicator of the automatic furnace con­troller and watching the start-up and
operating program.

39

System Diagram

1 Burner blower
2 Oil filter
3 Stop valve
4 Oil level indicator
5 Suction valve
6 Tank
7 Leak indicator
8 Quick-acting valve
9 Filling line
10 Limit transmitter
11 Vent line
12 Pump unit
13 Pressure holding
valvel

Stepless control, with supply pump and ring line system

Stepless control, direct intake

1 Burner blower
2Oil filter
3Stop valve
4 Oil level indicator
5 Suction valve
6 Tank

7 Leak indicator
8 Quick-acting valve
9 Filling line
10 Limit transmitter
11 Vent line

40

Product description

Brenner E10.12000/14000 L-EUF

Product description

The type E 10.12000/14000 LE-UF burners
are oil burners for the combustion of EL fuel
oil to DIN 51603-1.
They are equipped with a free-flame burner
head for low-NOx combustion. Other com

­ponents of the burners are: combustion-air
fan, air-pressure monitor with test pushbut

­ton, air box with servomotor for the air dam­pers, oil atomizer with high-pressure oil
pump, nozzle piping, return nozzle, oil
hydraulics block (with pressure monitors, val

­ves and control shaft), flexible pressure
tubing, and electrical igniter for fuel-oil opera

­tion. The burners can be linked up with an
electronic controller for interconnected ope

­ration, or can be equipped with their own
electronics for interconnected operation.
Speed control and O

2

control are options.

Important information

The burners should be installed and put into
operation by an engineering specialist who is
familiar with, and adheres to, the applicable
regulations and guidelines. Only the manu

­facturers, or persons appointed by them, are
permitted to do any repair work on monitors,
limiters and automatic firing systems as well
as any other safety-relevant equipment. Also
the replacement of original components is
the sole responsibility of specialists. The bur

­ner should be maintained at least once a
year by a duly qualified person. To this end,
a maintenance contract is recommended to
be concluded.
The burner must not be operated in rooms
exposed to aggressive vapours (e.g. sprays,
perchloroethylene, tetrachloro-hydrocarbon,
solvents) or dust. For a proper combustion­air supply, the firing system zone shall be
sufficiently ventilated.

Oil-based operation
Start-up

When the firing system is turned on, the bur­ner control circuit will close and the program
will be started. The burner will then be put
into operation as soon as the program has
been executed. This start-up process is con

­trolled and monitored by the automatic firing
unit (which is a component of the electronic
burner controller). The fan starts to run, and
the electric servomotor moves the closed air
damper into the pre-ventilation position so
that the burner can ventilate the combustion
chamber and exhaust with the required air
quantity.
After the required pre-ventilation time, the air
damper is moved into the ignition position.
Ignition is initiated, and the oil supply is
released. The solenoid valves open and let
the pressurized oil flow to the nozzle and
return line. The oil is then atomized, mixed
with the combustion air, and ignited. A pro

-

per, stable flame will form within the safety

period. Until the end of this safety period, a
"flame" signal will be applied via the flame
monitor to the automatic firing unit, and is
maintained until normal shut-down. The bur

-

ner start-up program is completed.

Operation

Following the formation of the flame, the bur­ner will for a short time remain at the separa­tely set ignition load level and is then
reduced to the minimum power level. The

­reafter, power control is released, i.e. the
power controller automatically regulates the
burner within the range from partial to full
load. Depending on the heat required, the
controller sends an "open" or "close" signal
to the servomotor to increase or reduce the
oil and air rate. In this "interconnected" con

­trol mode, both the oil control valve and the
air damper are set and, thus, the oil quantity
controlled in relation to the air quantity.
Thanks to this stepless volume control, the
burner can be set to any point between par

­tial and full load. When the burner is out of
operation, the air damper is closed so that no
cold air can flow through the burner, heat
generator and chimney.

General safety functions (oil)

If no flame forms after burner starting (fuel
release), the burner will shut down when the
safety period has elapsed (shut-down on
faults). Flame failure during operation and air
pressure failure during pre-ventilation or
during burner operation result in a fault shut­down. Any failure of the flame signal after the
safety period and a flame signal during pre­ventilation (external light control) result in a
fault shut-down, and the automatic firing unit
(component of the electronic burner control

­ler) is locked. Unlocking is possible immedia­tely after the fault shut-down. The firing unit
will return to its start position and resume the
burner restarting process. A power failure
results in a normal shut-down of the burner.
After voltage recovery, the burner can be
automatically restarted provided no other
locks are active (e.g. one set by a safety
chain). As a rule, fuel supply is immediately
cut off when a trouble occurs.

41

44

Customer Service:

ECB GmbH

Struppener Strasse
01796 Pirna