Bentone STG 146i/2 Technical specifications

Providing sustainable energy solutions worldwide
CR00395 178 083 26-1 2022-03-22
Installation- and maintenance instruction
STG 146i/2 J/K IP40
LMV37
MB-DLE 407
RWF50.2
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
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QR-koden.
3. Skriv in brännarens
artikelnummer som  nns 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  ndes
på typeskiltet (se billede), og
vælg dit sprog.
Detaljerede oplysninger om
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2. www.bentone.com\
download ou scannez le code
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3. Saisir le numéro d’article
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Des informations détaillées
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ecodesign.
-de
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anderen Sprachen
2. www.bentone.com\download
oder scannen Sie den QR-Code.
3. Geben Sie die Artikelnummer
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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 What to do if you smell gas......................................................... 5
2. Technical data.......................................................................6
2.1 Dimensions STG 146i/2................................................................ 6
2.2 Capacity range............................................................................... 7
2.3 Gas categories, approved gases................................................ 7
2.4 ElectricSpecicationEN60335-2-102...................................... 7
2.5 Workingeld.................................................................................. 8
2.6 Setting for insert and air damper ............................................. 8
2.7 Components................................................................................... 9
3. Installation..........................................................................11
3.1 General instructions................................................................... 11
3.2 Instructions .................................................................................. 11
3.3 Inspection and maintenance.................................................... 11
3.4 Preparation for assembly ......................................................... 11
3.5 Gas supply .................................................................................... 11
3.6 Electric connection ..................................................................... 11
3.7 Calculationofgasow.............................................................. 12
3.8 Calculate prepurge time, Industrial applications ................ 13
3.9 Mounting the burner to the boiler.......................................... 14
3.10 Gasnozzle..................................................................................... 15
3.12 Leakage control........................................................................... 16
3.13 Electric function test................................................................... 16
3.11 De-aerating................................................................................... 16
4. Burner settings ..................................................................17
4.1 Air settings ................................................................................... 17
4.2 Brake plate adjustment ............................................................. 17
4.3 Start-up ......................................................................................... 18
4.4 Adjustment .................................................................................. 18
4.5 Recommendedexcessairwhenusingdefaultsetting ....... 18
4.6 Settingtheairpressureswitch ................................................ 19
4.7 Settingthegaspressureswitchmin/VPS .............................. 20
4.8 Settingthegaspressureswitchmax/
overloadprotectionswitch ....................................................... 21
4.9 GasvalveMultiBlocDLE405-412 .......................................... 22
4.10 Skeletondiagrams, 1-stageburner ........................................ 25
5. Burner service ....................................................................26
5.1 Combustion device ..................................................................... 26
5.2 Fanmotorandfanwheel .......................................................... 27
5.3 Air intake and intake cone......................................................... 28
5.4 Replacement of electrical components.................................. 29
5.5 Vibration........................................................................................ 29
5.6 Flame monitoring and ionisation current check .................. 30
5.7 Flame detector QRC ................................................................... 31
5.8 Burner Service Schedule, Gas .................................................. 32
5.9 Component replacement intervals.......................................... 32
6. Electric equipment.............................................................33
6.1 Safety system .............................................................................. 33
6.2 Wiring diagram............................................................................ 34
7. Regulator RWF50................................................................36
7.1 ConnectionofPT100sensor ................................................... 36
7.2 Operation...................................................................................... 37
7.3 Basic display................................................................................. 38
7.4 User level ...................................................................................... 39
7.5 Startingtheself-settingfunction............................................. 40
7.6 ParameterizationPArA............................................................... 41
7.7 CongurationConF..................................................................... 43
7.8 Analog input InP1 ....................................................................... 44
7.9 Controller Cntr............................................................................. 45
7.10 Thermalshockprotection(TSS)rAFC...................................... 46
7.11 Control outputs OutP................................................................. 47
7.12 Binary input binF......................................................................... 48
7.13 Display diSP.................................................................................. 49
8. Automatic control unit LMV37 .........................................50
8.1 System structure/function description................................... 50
8.2 General information ................................................................... 51
8.3 TechnicalDataBasicunitLMV37.4.......................................... 51
8.4 Connection and internal diagram............................................56
9. Operation ...........................................................................58
9.1 LMV37automaticcontrolunit.................................................. 58
9.2 List of phase displays ................................................................. 60
9.3 Automatic control unit levels.................................................... 61
9.4 Setting the automatic control unit .......................................... 66
9.5 Backup and restore .................................................................... 78
9.6 Fault status message, display of errors and info ................. 82
9.7 Dispaly message of info............................................................. 88
9.8 Resetting the automatic control unit...................................... 89
9.9 Manual output ............................................................................. 90
10. Parameter list.....................................................................92
11. Error code list ...................................................................102
12. Handing over of the installation ....................................117
13. Troubleshooting...............................................................118
14. Service- and inspection protocol ...................................121

4Bentone
1. General Information
172 515 01-2 2021-10-05
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 should 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  re 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 current high voltage regulations and in a
professional manner.
• Make sure that the burner is suitable for the application (see
Technical Data).

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• 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.
• Sharp edges can occur on, for example:  ame tube, fan wheel
and air damper.
• The gas outlet from the pressure regulator must be
con gured in accordance with applicable regulations and lead
to a safe area.
-beforerst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.
1.3 What to do if you smell gas
• Turn off the fuel supply.
• Turn off the equipment and remove the boiler from operation.
• Open windows and doors.
• Prevent open  ames or sparking, e.g. do not turn lights on or
off, do not use any electrical appliances or mobile phones.
• Evacuate the building.
• Notify the installer or gas supplier of the problem so that it
can be recti ed.

6Bentone
172 535 22
L M N O
STG 146i/2 10.5 Ø 110 Ø 140-170 12.5
2. Technical data
The burner is intended for:
• Operation with boiler according to EN 303, EN 676 and EN 746-2.
Fuels:
• Natural gas H, E, L, LL.
• LPG Butane G30 and Propane G31.
2.1 Dimensions STG 146i/2
* Min. recommended distance to  oor.
2.1.1 Measurements for connection to boiler
N
M
L
O
D E F G H I J *K
STG 146i/2 269 239 197 200 158 101 32 200
Type Length of
burner tube
Flange
measure A
Burner tube
measure B
Burner tube
measure C
STG 146i/2 145 122 ø104 ø89
245 222 ø104 ø89
D
160303-540
A
F
E
øB øC
*K
G H
160303-541
J
I

7Bentone
2.2 Capacity range
2.3 Gas categories, approved gases
Only dry gas is permitted for use.
STG 146i/2
G20 - 41-133 4.3 14.1 360 20 DLE 405
DLE 407
G25 - 41-133 5.0 16.4 360 20 DLE 405
DLE 407
G30 - 47-144 1.5 4.5 360 20 DLE 405
DLE 407
G31 - 47-144 1.9 5.9 360 20 DLE 405
DLE 407
160303-542
Capacity
kW
Gas quantity
at min. power
Nm3/h
Gas quantity
at max. power
Nm3/h
Max.
connection
pressure
mbar
Min.
connection
pressure
mbar
Gas valve
MultiBloc
Gas quantity and capacity vary according to grade of gas and connection pressure.
Category Country of destination Supply pressure
II2R3R AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR,
HU, IE, IS, IT, LT, LU, LV, MK, MT, NL, NO, PL, PT, RO, RS, SE,
SI, SK, TR
20 mbar
II2H3B/P AT, CH, CY, DK, FI, LT, RO, SE, SK 20 mbar
II2H3P GB, IE 20 mbar
II2L3B/P NL, RO 20 mbar
II2E3B/P PL 20 mbar
I2E(R)B BE 20 mbar
I3P BE 20 mbar
160302-302-4
Measurements according to EN 3746: 2010
Alt.1 The sound level of the burner can be reduced by equipping the
burner with silencer. Installation must be done so it does not
prevent air supply to the burner.
Alt.2 The burner’s noise level can be reduced by connecting the
burner’s air intake to the air duct that opens into an appropriate
location. Installation must be done so it does not prevent air
supply to the burner.
Type STG 146i/2
Electrical data, Control power 230V, 1~, 1.5A, 50Hz, IP40
Electrical data, Motor -
Max fuse rating 10A
Noise level 79dBA
Max operating current, see data plate.
2.4 ElectricSpecicationEN60335-2-102

8Bentone
!Do not exceed
working eld.
2.5 Workingeld
2.6 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 ame, it is
necessary to adjust the settings so that they are adapted to the
installation and the fuel used.
mbar
kW
G20, G25 - 41-133 kW
G30, G31 - 47-144 kW
-1,0
0,0
1,0
2,0
3,0
4,0
5,0
30 40 50 60 70 80 90 100 110 120 130 140 150
160302-961-2
0
4
8
12
16
20
24
28
32
40 50 60 70 80 90 100 110 120 130 140
160303-543
kW
Air settings
Nozzle assembly
Scale
Burner output

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2.7 Components
1. Fixing  ange
2. Transformer
3. Connection Gas valve
4. Gas pressure switch VPS
5. Gas valve (MultiBloc)
6. Pressure regulator
7. Filter
8. Ignition electrode
9. Ionization electrode
10. Brake plate
11. Motor
12. Fan wheel
13. Brake plate adjustment
14. Air setting
160303-544
21 53 6
7
4
8
9
10
11 13 1412

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2.7.1 Components, electrical cabinet
15. Electrical box
16. Gas pressure switch min.
17. Gas pressure switch max./
Overload protection switch
18. Flame tube
19. Air pressure switch
20. Main switch
21. Fuse
22. Connection block
23. Automatic control unit LMV
24. Display AZL
(automatic control unit)
25. Reset
26. Operating switch 0-I
27. Regulator RWF
160303-546
24 2523 26
20 2219 21
160303-545 160303-547
15 16
18
1716

11Bentone
172 535 09
3. Installation
3.1 General instructions
Installation must be carried out in accordance with current regulations
and instructions.
The supplier/installer of the facility is obliged to familiarize himself
with all regulations so that the installation meets the requirements of
the local authorities.
Installation, assembly and adjustment must be performed to obtain
the best possible function. Only gas intended for the gas burner may
be used.
3.2 Instructions
It is the installer’s responsibility to instruct the user in detail in the
functions of the gas burner and the entire plant.
3.3 Inspection and maintenance
The system must be maintained at the interval specied in the service
schedule. If the burner is in a dirty environment, service should be
done at more frequent intervals.
3.4 Preparation for assembly
Check that the burner’s dimensions and capacity range match the
current boiler. The power information on the type plate refers to the
burner model’s min. and max. effect.
3.5 Gas supply
In order to obtain good operational safety, it is important that the
installation of the gas distribution system is carried out correctly,
considering the following:
• Check that the burner is approved for the gas quality of the
installation.
• Check that the burner gas components are approved for the
specied gas pressure, see type plate.
• Installation must be carried out in accordance with current
standards.
• Pipe lines should be assembled so that service can easily be
performed on the boiler and burner.
• Pipe lines should be assembled so that any contaminants do
not come into contact with the gas components.
3.6 Electric connection
• Before work on the electrical connection, the current must be
disconnected so that the installation is isolated.
• Connection must be done in accordance with the applicable
regulations.
• Connection must conform to the wiring diagram.
!If any electrical connection other than that recommended
by Enertech is used, there is a risk of property damage
and personal injury.

12 Bentone
3.7 Calculationofgasow
Formula
symbol Description
Example
values
VNStandard gas volume [Nm3/h]
Gas volume at normal condition 15 °C 1013 mbar
-
Q Boiler output [kW] 80 kW
HiLower caloric value of gas [kWh/m3]
Natural gas under normal conditions 15 °C 1013 mbar, EN 676
9.45 kWh/m3
ηBoiler eciency (e. g. 90%) 0.9
f Conversion factor (pressure and temperature compensation) -
tGas Gas temperature at gas meter [°C] 15 °C
PBaro Barometric air pressure [mbar] 945 mbar
PGas Pressure of gas at the gas meter [mbar] 20 mbar
V Operating volume [m3/h] -
VG Gas ow measured at the gas meter [m3] 0.26 m3
TMeasuring time for consumed gas quantity [s] 90 s
VN=
Q
VN =
80 kW
=9.4 m3/h
η· Hi0.9 · 9.45 kW/m3
Calculate standard volume using the following formula:
f=
273
x
PBaro + PGas f=
273
·
945 + 20
= 0.90
273 + tGas 1013 273 + 15 1013
Calculate conversion factor using the following formula:
V=VNV=9.4 m3/h =10.4 m3/h
f0.90
Calculate gas volume using the following formula:
V=3600 · VGV=3600 · 0.26 m3
=10.4 m3/h
T90 sek
Determine operating volume with the following formula:
Gas quality kWh/Nm3MJ/Nm3
Natural gas G20 9.5 34.02
Natural gas G25 8.2 29.25
Caloricvalueofthegas
Lower caloric value Hi at normal conditions 15 °C and 1013 mbar, EN 676.
For exact caloric value of the gas, contact the gas distributor.
172 535 24
Height above
sea level [m] 0 100 200 300 400 500 600 700 800 900 1000 1100 1200
PBaro [mbar] 1013 1001 989 977 966 954 943 932 921 910 899 888 877
Gas quality kWh/Nm3MJ/Nm3
Butan G30 32.25 116.09
Propan G31 24.44 88.00

13Bentone
3.8 Calculate prepurge time, Industrial
applications
Prepurge time can be set on control unit LMV with parameter 225.
Formula symbol Description Example values
VVolume re box [m3] 2 m3
Q Burner output [kW] 200 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 re box and adapted compartments.
T=V · 5 T=2 m3 · 5 =150 s
Q · 1.2 / 3600 200 kW · 1.2 / 3600
Calculate prepurge time using the following formula:
172 525 54 2022-01-11

14 Bentone
172 535 23
!Before obtaining access to terminals,
all supply circuits must be disconnected.
3.9 Mounting the burner to the boiler
The burner is mounted on the boiler with bolts (A) according to
the hole pattern on the  xing  ange.
1. Install the  xing  ange (B) and the enclosed gasket (C)
on the boiler. If new mounting holes need to be drilled,
use the  xing  ange as a template and fasten with M8-
M10 screws.
2. Loosen the burner tube (D) and  t the enclosed gasket
(E) around the  ame tube and check that the electrodes
are set correctly, see chapter Gas nozzle.
3. Mount the burner on the  xing  ange and fasten with
screws (F).
4. Check/Mount the enclosed o-ring on the gas connection
and mount the gas  xture on the burner.
5. Connect electrical connection for gas valve, gas pressure
switch min, gas pressure switch max and VPS/Tightness
check.
6. Connect gas line, connect supply cable, operating and
safety circuits.
160303-550
A CB
E D F

15Bentone
3.10 Gas nozzle
Check that the ignition electrodes are set correctly before assembly on the
boiler.
LPG
Naturgas
160303-548
160303-551
8.0
2.5
160303-549
45°
2.5

16 Bentone
3.13 Electric function test
When connecting from the mains, make sure that phase and neutral
are not reversed. The gas tap must be closed. Temporarily link the gas
pressure switch so that it does not block.
The prepurging time (30-35 sec.) begins after switching on the main
switch and setting the maximum and control thermostats. After this
time, the preignition comes into operation (0.5-2.5 sec. depending on
the design of the gas burner control).
The ignition spark must be able to operate awlessly at the amount
of air required for combustion. The gas valve is energized and opens.
After the end of the safety period (2-3 sec.), the gas burner control
goes into blockage. Solenoid valve and motor become de-energized.
Remove the link after testing.
3.11 De-aerating
De-aerating the gas line by closing the tap for the gas connection and
unscrewing the screw on the measuring nipple for the connection
pressure. Connect a plastic hose, open the tap and discharge the gas
to a safe place. When de-aerating is complete, do not forget to screw
the screw back into the measuring nipple.
3.12 Leakage control
When testing for leaks, the solenoid valve must be closed. Connect a
pressure gauge to the test nipple ”Pa”, see gure. The test pressure
in the system must not be higher than max. connection pressure, see
type plate. If leaks are found during measurement, locate the leaky
spot using soapy water or leak detection spray. After sealing, the
system is tested for leaks again.
!Check the gas tightness.
Pa

17Bentone
172 535 20
4. Burner settings
4.1 Air settings
Prior to commissioning, adjust the burner air damper setting
according to the diagram Basic setting, see Technical data. After the
rst start, the burner must be adjusted again for good function and
combustion.
0,25
0,75
4.2 Brake plate adjustment
The burner is equipped with a brake plate adjustment that changes
the position of the brake plate in the burner head. The position of the
brake plate must be adjusted to achieve as favorable a pressure drop
across the brake plate as possible.
Which position to use depends on gas ow and overpressure in the
boiler. At lower capacities, however, the opening should be smaller
between the brake plate and the combustion device. Turn the screw in
the desired direction with an Allen key.
• Turn screw to the right to reduce opening.
• Turn screw to the left to increase opening.

18 Bentone
Gas quality Excess air ue gases Max % CO2
% O2 % CO2 Lambda 1.2
Natural gas 3 - 5 ≈10 11.9
Propane 3 - 5 ≈11.5 13.9
Butane 3 - 5 ≈11.5 14.1
Liqueed
petroleum gas
3 - 5 ≈11 13.8
Biogas 3 - 5
Settingtheairpressureswitch
The air pressure switch must block the burner if the amount of air for
combustion becomes too low. The air pressure switch must be set so
that in the event of a lack of air supply at the burner’s max. or min.
capacity reacts before the monitored pressure drops so much that
poor combustion occurs.
1. Remove protective cover.
Carefully turn the scale on the air pressure switch clockwise
until the air pressure switch stops the burner.
4. Measure and note the lowest air pressure in the entire work
5. Set the air pressure switch to about 10-15% lower than the
lowest noted pressure.
6.
7. Re t protective cover.
4.3 Start-up
After the burner has been tted to the boiler, the electrical connection
is complete, the gas piping is seal tested and de-aerated, and the
electrical function test has been carried out, the burner is ready for
start-up.
Read the sections on setting of the gas valve, damper motor and
combustion device before starting.
Open the ball valve and switch on the main switch, start the burner
and start adjusting the system.
4.4 Adjustment
Check the combustion using ue gas analysis instruments. Set the
burner to about 20% excess air and check the ue gas temperature.
Calculate the combustion eciency. Also check the current amount of
gas on the gas meter so that the correct applied power is achieved.
4.5 Recommendedexcessairwhenusing
default setting

19Bentone
4.6 Settingtheairpressureswitch
Settingtheairpressureswitch
The air pressure switch must block the burner if the amount of air for
combustion becomes too low. The air pressure switch must be set so
that in the event of a lack of air supply at the burner’s max. or min.
capacity reacts before the monitored pressure drops so much that
poor combustion occurs.
1. Remove protective cover.
2. Start the burner.
3. Carefully turn the scale on the air pressure switch clockwise
until the air pressure switch stops the burner.
4. Measure and note the lowest air pressure in the entire work
area.
5. Set the air pressure switch to about 10-15% lower than the
lowest noted pressure.
6. Test run the burner and check the function in the entire work
area.
7. Re t protective cover.
!Be careful when adjusting the air pressure switch;
it contains a live component.

20 Bentone
4.7 Settingthegaspressureswitchmin/VPS
172 535 25
Settingthegaspressureswitchmin
The gas pressure switch must react to too low a connection pressure
to the burner, prevent the burner from starting and stop the burner
during operation. The burner may start again when the connection
pressure has risen above the set pressure on the gas pressure switch.
1. Remove protective cover.
2. Open measuring socket and connect a manometer for
measuring connection pressure.
3. Start the burner.
4. Measure and note the connection pressure to the burner at
the highest input power.
5. Set the gas pressure switch to a value 10-15% lower than the
noted pressure.
6. Check the setting by carefully closing the ball valve and at the
same time measuring the connection pressure.
7. When the gas pressure switch stops the burner, the measured
value must approximately correspond to the setting on the
gas pressure switch.
8. Open ball valve.
9. Remove manometer and close measuring socket.
10. Re t protective cover.
!Check gas tightness.