Bentone B 70i-3R FAME J User manual

Providing sustainable energy solutions worldwide
CR00343 178 070 63-4 2022-04-01
Installation and maintenance instruction
B 70i-3R FAME/RME J/K
LMV37
E6NC
Translation of the original instructions.

2Bentone
example Beispielexempel
352011030141
Designation
Type
Model
Serial no.
Motor supply
Main supply
MADE IN SWEDEN BY
LIGHT OIL 35-90kW 1,25-6,0 cSt 7-14bar
BF 1 KS 76-24
BF 1
BF 1 KS 76-24
1234567
1~230V 1,0A 50Hz IP 20
Man.Year 2019
Cap. Min-Max
3
?
1
-sv
1. Manualer på övriga språk
2. www.bentone.com\
nedladdning
eller scanna QR-koden.
3. Skriv in brännarens
artikelnummer som finns på din
typskylt (se bild) och välj ditt
språk.
Detaljerad ecodesign information
kan laddas ner på:
www.bentone.com/ecodesign.
-en
1. Manuals in other languages
2. www.bentone.com\download
or scan QR-code.
3. Enter the burner`s article
number on your data plate (see
picture) and select language.
Detailed ecodesign information
can be downloaded at:
www.bentone.com/ecodesign.
-da
1. Manualer på andre sprog
2. www.bentone.com\download
eller scan QR-koden.
3. Indtast brænderens
artikelnummer, der findes på
typeskiltet (se billede), og vælg
dit sprog.
Detaljerede oplysninger om
ecodesign kan downloades på:
www.bentone.com/ecodesign.
-fr
1. Manuels dans d’autres
langues
2. www.bentone.com\download
ou scannez le code QR.
3. Saisir le numéro d’article
du brûleur sur votre plaque
signalétique (consultez
l’illustration) et sélectionnez la
langue.
Des informations détaillées
sur l’écodesign peuvent être
téléchargées à l’adresse:
www.bentone.com/ecodesign.
-de
1. Gebrauchsanweisungen in
anderen Sprachen
2. www.bentone.com\download
oder scannen Sie den QR-Code.
3. Geben Sie die Artikelnummer
des Brenners auf Ihrem
Typenschild ein, (siehe Bild) und
wählen Sie die Sprache aus.
Detaillierte Informationen zum
Ecodesign können unter
www.bentone.com/ecodesign
heruntergeladen werden.
2

3Bentone
Table of contents
1. General Information __________________________________ 4
1.1 Delivery inspection ________________________________ 4
1.2 Safety ___________________________________________ 4
1.3 General requirements FAME/RME ___________________ 6
2. Technical data _______________________________________ 7
2.1 Dimensions B 70i-3R ______________________________ 7
2.2 Electrical Specifications ____________________________ 7
2.3 Working field B 70i-3R _____________________________ 8
2.4 Setting for insert and air damper ____________________ 8
2.5 Setting of ignition electrodes and brake plate __________ 9
2.6 Burner installation _________________________________ 9
2.7 Nozzle and pressure_______________________________ 9
2.8 Nozzle table_____________________________________ 10
2.9 Components ____________________________________ 12
3. General instructions _________________________________ 14
3.1 General rules ____________________________________ 14
4. Installation _________________________________________ 15
4.1 Handling and lifting instruktion _____________________ 15
4.2 Acceptance inspection____________________________ 16
4.3 Preparations for installation ________________________ 16
4.4 Distribution of oil _________________________________ 16
4.5 Electrical connection______________________________ 17
4.6 Mounting the burner to the boiler ___________________ 18
4.7 Check oil line seals _______________________________ 18
5. Burner settings _____________________________________ 19
5.1 Calculate prepurge time, Industrial applications _______ 19
5.2 Example of basic settings _________________________ 20
5.3 Insert control, movable brake plate__________________ 21
5.4 Air setting_______________________________________ 21
5.5 Setting the air pressure switch _____________________ 22
6. Service_____________________________________________ 23
6.1 Combustion device ______________________________ 23
6.2 Air dampers ____________________________________ 24
6.3 Damper motor, air ________________________________ 25
6.4 Oil pump _______________________________________ 26
6.5 Electrical components ____________________________ 27
6.6 Check oil line seals _______________________________ 27
6.7 Vibrations _______________________________________ 28
6.8 Burner Service Schedule, FAME/RME _______________ 29
6.9 Component replacement intervals __________________ 29
7. Pump instruction E6NC-1069 7P______________________ 30
7.1 Technical data ___________________________________ 30
7.2 Components ____________________________________ 30
7.3 Oil connection ___________________________________ 30
7.4 Changing the filter________________________________ 30
7.5 Function ________________________________________ 31
7.6 Preheating pump ________________________________ 31
8. Electric equipment __________________________________ 32
8.1 Safety system ___________________________________ 32
8.2 Wiring diagram _________________________________ 33
8.3 Component list LMV______________________________ 34
8.4 Component electric box___________________________ 34
9. LMV37 Automatic control unit ________________________ 35
9.1 System structure/function description _______________ 35
9.2 General information ______________________________ 36
9.3 Technical Data Basic unit LMV37.4...________________ 36
9.4 Connection and internal diagram ___________________ 41
10. Operation ________________________________________ 43
10.1 LMV37 automatic control unit ______________________ 43
10.2 List of phase displays _____________________________ 45
10.3 Automatic control unit levels _______________________ 46
10.4 Setting the automatic control unit ___________________ 51
10.5 10.4 Multistage operation _________________________ 54
10.6 Backup and restore ______________________________ 66
10.7 Fault status message, display of errors and info_______ 70
10.8 Dispaly message of info ___________________________ 76
10.9 Resetting the automatic control unit_________________ 77
10.10 Manual output_______________________________ 78
11. Parameter list ____________________________________ 80
12. Error code list ____________________________________ 89
13. Fault Location ___________________________________ 104
13.1 Burner will not start______________________________ 104
13.2 Burner will not start after normal use _______________ 104
13.3 Delayed ignition_________________________________ 105
13.4 Noise in pump __________________________________ 105
13.5 Pump pressure _________________________________ 106
14. Log of flue gas analysis___________________________ 107

4Bentone
1. General Information
165 105 01-2 2021-12-07
The burner may only be used for its intended purpose in accordance with the
product’s technical data.
We reserve the right to make design changes and cannot be held liable for
any misprints or typographical errors.
Modifying the design or using accessories or components that have not been
approved by Enertech in writing is strictly prohibited.
This Installation and Maintenance manual:
• is to be regarded as part of the burner and must always be kept near
the installation site.
• must be read prior to installation.
• is intended for use by authorised personnel.
1.1 Delivery inspection
• Make sure everything is delivered and the goods have not been
damaged during transit.
Transport damage must be reported to the shipping company.
• If something is wrong with a delivery, report it to the supplier.
1.2 Safety
- before installation:
• Installation and work on the burner and associated system
components may only be carried out by persons who have undergone
relevant training.
• The product is packaged to prevent damage from occurring when
handled – Handle the product with care! Lifting equipment must be
used to lift larger packages.
• The products must be transported/stored on a level surface in a dry
environment, max. 80% relative humidity, no condensation.
Temperature -20 to +60 °C.
- installation:
• The burner must be installed in accordance with local regulations for
fire safety, electrical safety, and fuel distribution.
• The premises must comply with local regulations pertaining to use of
the burner, and must have adequate air supply.
• The installation site must be free of chemicals.
• Fire extinguisher with Class BE recommended.
• Make sure when installing the burner that there is enough space to
service the burner.
• The electrical installation must be professionally carried out in
accordance with applicable high voltage regulations.
• Make sure that the burner is suitable for the application (see Technical
Data).

5Bentone
• All components must be installed without being bent, twisted or
subjected to mechanical or thermal forces that affect components.
• Care must be taken by the installer to ensure that no electrical cables
or fuel lines are crushed or otherwise damaged during installation or
service.
• Flame tubes, fan wheels and air dampers, for example, may contain
sharp edges.
- before first start:
• The burner must not be put into operation without proper safety and
protection devices.
• Permitted ambient temperature during operation -10 to +60 °C. Max.
80% relative humidity, no condensation.
• The surface temperature of the burner’s components may exceed
60°C.
• Handle with caution – the burner has moving parts, and there is risk of
crushing injuries.
• Seal inspections must be performed during installation and servicing to
prevent leakage.
• fitting and installation work has been completed and approved.
• electrical installation has been correctly performed.
• flue gas ducts and combustion air ducts are not blocked.
• all actuators and control and safety devices are in working order and
correctly set.
• If the boiler is equipped with an access hatch, this must be equipped
with a hatch opening switch connected to the burner’s safety system.
• When in operation, the burner’s noise level can exceed 85 dBA – use
hearing protection!
- Operation:
• Carry out all stipulated settings, service and inspection work within the
set time.
• If the oil burner control has a solid red light, contact your installer.

6Bentone
165 405 06 2021-12-07
1.3 General requirements FAME/RME
• The fuel must meet the requirements of standard EN 14214 for FAME.
• The fuel must be stored and used according to the manufacturer’s
instructions. It should typically be used within 6 months of
manufacture. Fuel that is allowed to age loses its oxidation stability and
produces aggressive constituents. These may cause oxidation damage
to components in the oil system. The fuel should be stored in a cool
and dark area.
• The RME tank must be made of metal or dark coloured plastics
approved for the fuel.
• Burners fuelled by FAME (RME) are – and must be – equipped with
parts designed for this fuel. This applies to oil-related parts such as the
pump, solenoid valve, oil filter and hoses.
• Oil hoses must be of high-quality fluoride rubber or PTFE intended for
FAME/RME, and the hoses must be fitted with fire-retardant sleeves in
order to satisfy requirements according to EN-ISO 6806.
• The installation should be performed as a single-pipe system. Copper
should be avoided the fuel system since the fuel and copper have an
oxidising effect on each other.
• Annual cleaning and checking for the presence of water in the tank
should be done to avoid corrosion and microorganisms.

7Bentone
2. Technical data
The burner is intended for:
• Light oil, B10 heating oil/biofuel mix, FAME, B-100 (RME) (as per the definition in DINV51603-6)
and used for:
• Hot water boilers
• Steam boilers
• Industrial applications
• Warm air boilers
2.1 Dimensions B 70i-3R
*Minimum recommended floor dimensions.
**A Ø B Ø C D E F G H *I
324 220 205 730 408 504 420 830 200
624 220 205 730 408 504 420 830 200
165 105 79-2
G
HA D
Ø B
Ø C
E
F
*I
Type Motor Operating supply Sound
B 70i-3R 230/400V, 10.4/6.0A 230V, 0.7A, 50Hz 89dBA ± 0.5dBA
Max operating current, see data plate.
2.2 Electrical Specifications
The burner corresponds to IP 54

8Bentone
2.3 Working field B 70i-3R
2.4 Setting for insert and air damper
Basic settings should only be seen as setting values to get burner to start.
Once the burner has started and established flame, it is necessary to adjust
the settings so that they are adapted to the installation and the fuel used.
-1,0
0,0
1,0
2,0
3,0
4,0
5,0
6,0
7,0
8,0
9,0
400 600 800 1000 1200 1400 1600
mbar
kW
41-139 kg/h
490-1650 kW
160303-240
0
10
20
30
40
50
60
70
80
90
100
400 600 800 1000 1200 1400 1600
160302-567-2
kW
Air settings
Nozzle assembly
Scale
Burner output
!Do not exceed
working field.

9Bentone
Nozzle: 45° Solid/semi-solid
60° Solid/semi-solid
Pump pressure 14 bar (12-16 bar)
d1
d2
d3
2.6 Burner installation
2.6.1 Hole pattern
Make sure the hole pattern on the boiler is adapted to the fixing flange.
Combustion device d1d2d3
B 70i-3R (205) 225 14 (310) 324-390
d1* If the flame tube is installed from inside the boiler.
d3* The hole pattern can be moved down if the flame tube is installed
from the front and the tabs in the flange are removed.
2.7 Nozzle and pressure
Due to different furnace geometries and capacities, it is not possible to
recommend a nozzle model.
2.5 Setting of ignition electrodes and
brake plate
!*NOTE! It is
important that
the spark does
not strike against
the brake plate or
nozzle.
Burner, Type a b c d
B 70i-3R 3.5-4.0 8.0-10.0 2.0-3.0 10.0-13.0
a
d
b
c

10 Bentone
The table applies to oil with a viscosity of 4.4 mm2/s (cSt) at a density of 830 kg/m3.
2.8 Nozzle table
Pump pressure bar
10 11 12 13
Gph kg/h kW Mcal/h kg/h kW Mcal/h kg/h kW Mcal/h kg/h kW Mcal/h
1,00 3,72 44 38 3,90 46 40 4,08 48 42 4,24 50 43
1,10 4,09 48 42 4,29 51 44 4,48 53 46 4,67 55 48
1,20 4,47 53 46 4,68 55 48 4,89 58 50 5,09 60 52
1,25 4,65 55 47 4,88 58 50 5,10 60 52 5,30 63 54
1,35 5,02 59 51 5,27 62 54 5,50 65 56 5,73 68 58
1,50 5,58 66 57 5,85 69 60 6,11 72 62 6,36 75 65
1,65 6,14 73 63 6,44 76 66 6,73 80 69 7,00 83 71
1,75 6,51 77 66 6,83 81 70 7,14 85 73 7,42 88 76
2,00 7,45 88 76 7,81 93 80 8,16 97 83 8,49 101 87
2,25 8,38 99 85 8,78 104 90 9,18 109 94 9,55 113 97
2,50 9,31 110 95 9,76 116 100 10,19 121 104 10,61 126 108
2,75 10,24 121 104 10,73 127 109 11,21 133 114 11,67 138 119
3,00 11,16 132 114 11,71 139 119 12,23 145 125 12,73 151 130
3,50 13,03 154 133 13,66 162 139 14,27 169 146 14,85 176 151
4,00 14,89 176 152 15,62 185 159 16,31 193 166 16,97 201 173
4,50 16,75 199 171 17,57 208 179 18,35 218 187 19,10 226 195
5,00 18,62 220 190 19,52 231 199 20,39 242 208 21,22 252 216
5,50 20,48 243 209 21,47 255 219 22,43 266 229 23,34 277 238
6,00 22,34 265 228 23,42 278 239 24,47 290 250 24,46 302 260
6,50 24,20 287 247 25,37 301 259 26,51 314 270 27,58 327 281
7,00 26,06 309 266 27,33 324 279 28,55 339 291 29,70 352 303
7,50 27,92 331 285 29,28 347 299 30,59 363 312 31,83 377 325
8,00 29,79 353 304 31,23 370 318 32,63 387 333 33,95 403 346
8,50 31,65 375 323 33,18 393 338 34,66 411 353 36,07 428 368
9,00 33,59 398 343 35,14 417 358 63,71 435 374 38,19 453 389
9,50 35,37 419 361 37,09 440 378 38,74 549 395 40,31 478 411
10,00 37,23 441 380 39,04 463 398 40,78 484 416 42,44 503 433
11,00 40,96 486 418 42,94 509 438 44,86 532 457 46,68 554 476
12,00 44,68 530 456 46,85 556 478 48,94 580 499 50,92 604 519
14,00 52,12 618 531 54,65 648 557 57,10 677 582 59,41 705 606
16,00 59,57 706 607 62,46 741 637 65,26 774 666 67,90 805 692
18,00 67,02 795 683 70,27 833 717 73,41 871 749 76,39 906 779
20,00 74,47 883 759 78,08 926 796 81,57 967 832 84,87 1007 865
22,00 81,91 971 835 85,89 1019 876 89,73 1064 915 93,36 1107 952
24,00 89,36 1060 911 93,70 1111 956 97,88 1161 998 101,85 1208 1039
26,00 96,81 1148 987 101,50 1204 1035 106,04 1258 1081 110,33 1308 1168

11Bentone
The table applies to oil with a viscosity of 4.4 mm2/s (cSt) at a density of 830 kg/m3.
Nozzle table
Pump pressure bar
14 15 16 17
Gph kg/h kW Mcal/h kg/h kW Mcal/h kg/h kW Mcal/h kg/h kW Mcal/h
1,00 4,40 52 45 4,56 54 46 4,71 56 48 4,85 57 49
1,10 4,84 57 49 5,01 59 51 5,18 61 53 5,34 63 54
1,20 5,29 63 54 5,47 65 56 5,65 67 58 5,82 69 59
1,25 5,51 65 56 5,70 68 58 5,89 70 60 6,07 72 62
1,35 5,95 70 61 6,15 73 63 6,36 75 65 6,55 78 67
1,50 6,60 78 67 6,83 81 70 7,06 84 72 7,27 86 74
1,65 7,27 86 74 7,52 89 77 7,77 92 79 8,01 95 82
1,75 7,71 91 79 7,97 95 81 8,24 98 84 8,49 101 87
2,00 8,81 104 90 9,12 108 93 9,42 112 96 9,71 115 99
2,25 9,91 118 101 10,26 122 105 10,60 126 108 10,92 130 111
2,50 11,01 131 112 11,39 135 116 11,77 140 120 12,13 144 124
2,75 12,11 144 123 12,53 149 128 12,95 154 132 13,35 158 136
3,00 13,21 157 135 13,67 162 139 14,13 168 144 14,56 173 148
3,50 15,42 183 157 15,95 189 163 16,49 196 168 16,99 201 173
4,00 17,62 209 180 18,23 216 186 18,84 223 192 19,42 230 198
4,50 19,82 235 202 20,51 243 209 21,20 251 216 21,84 259 223
5,00 22,03 261 225 22,79 270 232 23,55 279 240 24,27 288 247
5,50 24,23 287 247 25,07 297 256 25,91 307 264 26,70 317 272
6,00 26,43 313 270 27,49 326 280 28,27 335 288 29,13 345 297
6,50 28,63 340 292 29,63 351 302 30,62 363 312 31,55 374 322
7,00 30,84 366 314 31,91 378 325 32,98 391 336 33,98 403 374
7,50 33,04 392 337 34,19 405 349 35,33 419 360 36,41 432 371
8,00 35,25 418 359 36,47 433 372 37,69 447 384 38,80 460 396
8,50 37,45 444 382 38,74 459 395 40,04 475 408 41,26 489 421
9,00 39,65 470 404 41,02 486 418 42,40 503 432 43,69 518 446
9,50 41,85 496 427 43,30 514 442 44,75 531 456 46,11 547 470
10,00 44,06 523 449 45,58 541 465 47,11 559 480 47,11 559 480
11,00 48,46 575 494 50,14 595 511 51,82 615 528 53,40 633 545
12,00 52,87 627 539 54,70 648 558 56,53 670 576 58,25 691 594
14,00 62,68 732 629 63,81 757 651 65,95 778 669 67,96 806 693
16,00 70,49 836 719 72,93 865 744 75,38 894 769 77,67 921 792
18,00 79,30 940 809 82,05 973 837 84,80 1006 865 87,38 1036 891
20,00 88,11 1045 899 91,17 1081 930 94,22 1117 961 97,09 1151 990
22,00 96,92 1149 988 100 1189 1023 104 1229 1057 107 1267 1089
24,00 106 1254 1078 109 1297 1116 113 1341 1153 116 1382 1188
26,00 115 1359 1168 119 1406 1209 122 1453 1249 126 1497 1287

12 Bentone
1. Inspection glass
2. Guides
3. Solenoids with block
4. Fixing flange
5. Flame tube
6. Flange locking
7. Air intake
8. Damper motor
9. Solenoid valve
10. Pump
11. Insert control
12. Air pressure switch
13. Flame detector
14. Motor
15. Electrical cabinet (burner)
16. Fan wheel
17. Transformer
18. Main switch
19. LMV Automatic control unit
20. Fuse
21. Surge protection
22. Contactor
23. AZL Display for LMV
Automatic control unit
24. Operating switch 0-I
25. Ignition electrodes
26. Brake plate
27. Nozzles
28. Insert
1
2345
6
7
8
9
10
11
12
16
2.9 Components

13Bentone
13
14
15
17
21
22
18
20
19
23 24
26
27
28
25

14 Bentone
165 105 81
3. General instructions
3.1 General rules
The installation of an oil burner should be carried out in accordance with
local regulations. The installer of the burner must therefore be aware of all
regulations relating to oil and combustion.
Only oil suitable for the burner should be used and then in combination with
a suitable oil filter before the oil pump of the burner.
If the burner is replacing an existing burner make sure that the oil filter
is replaced or cleaned. The installation must only be undertaken by
experienced personnel. Care should be taken by the installer to ensure
that no electrical cables or fuel/gas pipes are trapped or damaged during
installation or service/maintenance.
3.1.1 Installation and maintenance instructions
The maintenance instructions supplied with the burner must be kept at an
easily accessible location in the boiler room.
3.1.2 Instructions
It is the installer’s responsibility to instruct the user in detail in the functions of
the burner and the entire system.
3.1.3 Inspection and maintenance
Refer to servicing schedule
3.1.4 Before commissioning
A 3-stage thermostat must be installed before operation, contact Bentone
for more information about the appropriate product.
3.1.5 Start up
In order to obtain the correct setting, a flue gas analysis and temperature
measurement must be carried out. Otherwise, there is a risk of soot build
up, poor efficiency or condensation precipitation in the chimney. The system
must be fine-tuned at start-up. The temperature in the chimney must be at
least 60 °C at 0.5 m down in the chimney to prevent condensation.

15Bentone
4. Installation
4.1 Handling and lifting instruktion
!The lifting aid are available
as spare parts.

16 Bentone
1
4.2 Acceptance inspection
Make sure everything is delivered and the goods have not been damaged
during transit. If something is wrong with the delivery, report it to the supplier.
Transport damage must be reported to the shipping company.
4.3 Preparations for installation
Check that the burner’s dimensions and capacity range are suitable for the
boiler in question. The power data on the type sign refers to the burner’s min.
and max. power.
4.4 Distribution of oil
In order to achieve good reliability, it is important that the oil distribution
system is designed correctly.
Take the following into account:
• Selection of pipe diameter, pipe length and height difference; see
Pump instruction.
• Pipelines are to be laid with a minimal number of glands.
• The pipes are to be laid so that the oil supply hoses are not subjected
to tensile stresses or are excessively bent when the burner is swung
out or removed for service.
• The oil filter should be installed so that the filter cartridge can easily be
replaced or cleaned. Self-cleaning filters are recommended for oils of a
higher viscosity or oils that contain significant impurities.
• Oil-affected parts shall be selected in materials that are capable of
withstanding the medium’s physical properties.
• When installing oil hoses, check that the inlet and return hoses are
fitted to the appropriate connection on the oil pump. The hoses shall
be located so that they do not bend or become subject to tensile load.
• Bleed the oil system. The oil pump/oil preheater may be damaged if
run dry. The vacuum should not fall below -0.3 bar in the suction line
during start-up.
4.4.1 Proposed pipe routing for oil distribution systems
without transport pump
This type of connection should be used only when the oil has a viscosity less than
6 mm²/s.
1. Oil filter
!Be sure to fill the
burner oil system
before starting it for
the first time.

17Bentone
4.4.2 Pipe routing suggestion for oil distribution systems with a
transport pump, coarse filter and fine filter
1. Transport pump
2. Coarse filter
3. Bypass valve 0,5 - 2,0 bar
4. Fine filter
5. Manometer 1
6. Manometer 2
3
2
1 Transport oil pump / Transportoljepump
4
5
6
1
!If any electrical connection is used other than that recommended by Bentone,
there may be a danger of damage to property and personal injury.
4.5 Electrical connection
• Before work on the electrical connection, the current should be
disconnected so that the installation is isolated.
• Electrical connection must be done in accordance with the applicable
regulations.
• Burners should be connected to an isolator switch.
• The connection should be made in accordance with the wiring diagram.
• Fuse rating is as required.

18 Bentone
165 105 82
4.6 Mounting the burner to the boiler
1. Remove fan housing from connection flange.
2. Remove brake plate from nozzle line.
3. Fit selected nozzles, (see Technical Data).
4. Fit brake plate to nozzle line.
5. Remove flame tube from flange.
6. Fit flange with gasket to the boiler.
7. Fit flame tube to flange. Make sure that the holes in the front edge of
the flame tube are pointing down (not found on all flame tubes). This
allows any drops of oil to run out.
8. Insulate between the burner and boiler door to reduce radiated heat.
9. Mount fan housing on flange.
10. Lock fan housing with nut(s).
11. Connect oil hoses to pump (see chapter Pump Instructions).
12. Connect burner electrically (see chapter Electrical Equipment).
4.7 Check oil line seals
Once the burner has been installed and commissioned, the seals of the
various coupling elements should be checked (A). If there is any leakage,
retighten the connections.
!If the flame tube must be installed from the inside
of the boiler, the boiler must be opened or have a
hinged flange that allows it to be reconnected with
the flame tube mounted.
!Use Loctite 5188 on
threaded oil lines.
A
A

19Bentone
165 105 83-2
5. Burner settings
5.1 Calculate prepurge time,
Industrial applications
Prepurge time can be set on control unit LMV with parameter 265.
Formula symbol Description Example values
V Volume fire box [m3] 13.07 m3
Q Burner output [kW] 1307 kW
T Prepurge time [s]
Industrial applications according to EN 746.
The prepurge time must correspond to at least 5 complete
air circulations in the fire box and adapted compartments.
T = V · 5 T=13.07 m3· 5 = 150 s
Q · 1.2 / 3600 1307 kW · 1.2 / 3600
Calculate prepurge time using the following formula:

20 Bentone
5.2 Example of basic settings
This is an example of nozzle selection and air/insert setting.
Selection of output and connection between the different power stages must
be selected and adjusted so that the system achieves good functionality.
Example - Nozzle selection B 70i-3R
Burner output 1307 kW
Pump pressure 14 bar
Nozzle selection according to table, (see Technical data).
Step 1 40% 523 kW 10.0 Gph
Step 2 30% 392 kW 7.5 Gph
Step 3 30% 392 kW 7.5 Gph
Example - Basic settings B 70i-3R
Values can be determined from diagrams for air damper and insert setting
values, (see Technical data).
The different program steps are described in the LMV chapter.
Insert setting Step 1 20
Step 2 20
Step 3 34
Air damper mode
What happens in the various stages is described in the LMV chapter.
P0 Ignition air damper =13°
P1 Low load air damper =13°
P2 on MV2 open =30°
P2 d preset air damper =45°
P2 air damper step 2 =45°
P2 off, MV2 disconnection =30°
P3 on, MV3 opens =60°
P3 d preset air damper =72°
P3 air damper step 3 =72°
P3 off, MV3 disconnection =60°