Bentone BG 700-2 Biogas Technical specifications

Providing sustainable energy solutions worldwide
CR00301 178 151 80-2 2021-07-01
Installation- and maintenance instruction
BG 700-2 Biogas
BP230UVFR-S2
DMV-DLE 525/11
MVD 220/5
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
2. Technical data _______________________________________ 7
2.1 Dimensions _____________________________________ 7
2.2 Capacity range __________________________________ 8
2.3 Gas categories approved gases_________________ 8
2.4 Working field ____________________________________ 9
2.5 Electric Specification EN 60335-2-102 ______________ 9
2.6 Description BG700-2 ____________________________ 10
3. General instructions ________________________________ 11
3.1 General instructions _____________________________ 11
3.2 Installation and maintenance instructions____________ 11
3.3 Instructions_____________________________________ 11
3.4 Inspection and maintenance ______________________ 11
3.5 Start up________________________________________ 11
3.6 Commissioning of installation _____________________ 11
4. Installation _________________________________________ 12
4.1 Delivery check __________________________________ 12
4.2 Preparations for installation _______________________ 12
4.3 Gas supply_____________________________________ 12
4.4 Electric connection ______________________________ 12
4.5 Setting brake plate and air flow ____________________ 12
4.6 Handling and lifting instruction_____________________ 13
4.7 Mounting on the boiler ___________________________ 14
4.8 Inspection of gas nozzle before commissioning ______ 15
4.9 Leakage control_________________________________ 16
4.10 Gas nozzle _____________________________________ 17
4.11 Setting Damper motor 2-stage ____________________ 18
5. Setting the burner __________________________________ 19
5.1 Setting the air pressure switch_____________________ 19
5.2 Setting the min. gas pressure switch _______________ 20
5.3 Skeleton diagram, biogas 2-stage burner ___________ 21
5.4 Adjusting the Gas Train___________________________ 21
6. Gas pressure regulator Type FRS_____________________ 22
6.1 Double Solenoid valve Type DMV-D.../11
Type DMV-DLE.../11 _________________________ 24
6.2 Adjustment of gas solenoid valve dungs MVD________ 26
6.3 Recommended excess air when using default setting _ 27
6.4 Determining the gas quantity for the system _________ 27
6.5 Calculating the quantity of gas supplied_____________ 29
7. Service ____________________________________________ 30
7.1 Servicing the combustion assembly ________________ 30
7.2 Servicing air dampers ____________________________ 31
7.3 Replacement of damper motor, air _________________ 32
7.4 Vibration _______________________________________ 33
7.5 Flame monitoring and ionisation current check_______ 34
7.6 UV-5 detector __________________________________ 34
8. Handing over of the installation ______________________ 35
9. Fault location, functional troubles ____________________ 35
10. Electric equipment ________________________________ 36
10.1 Safety system __________________________________ 36
10.2 Wiring diagram BP S2 ___________________________ 37
10.3 List of components ______________________________ 38
11. Control __________________________________________ 39
11.1 Technical data __________________________________ 39
11.2 LED indicator lamps _____________________________ 39
11.3 Explanation of the different sequence modes ________ 40
11.4 BurnerPro LED fault/lock code table________________ 41
11.5 Leakage control Dungs VPS 504 __________________ 44
12. Troubleshooting __________________________________ 46
13. General instructions for gasburners_________________ 49

4Bentone
1. General Information
This Installation and Maintenance manual:
• is to be regarded as part of the burner and must always be kept near
the installation site.
• is intended for use by authorised personnel.
• must be read prior to installation.
• must be observed by all who work with the burner and associated
system components.
• work with the burner may only be carried out by certified installers/
personnel.
Enertech AB is not liable for any typographical errors and reserves the right
to make design changes without prior notice.
Safety instructions
• The burner may only be used for its intended purpose in accordance
with the product’s technical data.
• The burner may only be installed and operated by authorised
personnel.
• The product is packaged to prevent damage from occurring during
handling. 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.
• Check that the burner is compatible with the boiler’s output range.
• All components must be installed without being bent, twisted or
subjected to mechanical or thermal forces which can affect the
components.
• The burner must be installed so that it complies with local regulations
for fire safety, electrical safety, and fuel distribution.
• The gas outlet from the pressure regulator shall be configured in
accordance with applicable regulations and lead to a safe area.
• Make sure when installing the equipment that there is enough space to
service the burner.
• Permitted temperature during operation -10 to +60 °C. Max 80%
relative humidity, no condensation.
• The installer must ensure that the room has adequate air supply.
• The room must comply with local regulations pertaining to its intended
use.
• The installation site must be free of chemicals.
• Burner pipes, fan wheels and air dampers may contain sharp edges.
• The surface temperature of the burner’s components can exceed
60°C.
• Caution: The burner has moving parts, and there is risk of crushing
injuries.
172 515 01 2018-01-02

5Bentone
• The electrical installation must be professionally carried out in
accordance with applicable high voltage regulations, as per Enertech’s
recommendations.
• Before servicing, shut off the fuel supply and turn off the power to the
burner.
• Seal inspections must be performed during installation and servicing to
prevent gas leakage.
• Care should be taken by the installer to ensure that no electrical cables
or fuel lines are crushed or otherwise damaged during installation or
servicing.
• 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.
• The burner must not be put into operation without proper safety and
protection devices.
• A Class BE fire extinguisher is recommended.
• It is forbidden to alter thedesign or use accessories which have not
been approved by Enertech in writing.
• Prior to operation, the following points must be checked:
-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
Actions to take if you smell gas
Turn off the equipment and the boiler. Open windows and doors. Prevent
open flames or sparking, e.g. do not turn lights on or off, do not use any
electrical appliances, do not use mobile phones. Open windows and doors.
Close the gas ball valve. Warn residents; do not use doorbells. Evacuate
the building. Notify the installer or gas supplier once the building has been
evacuated.

6Bentone
Control system 10 years 250 000 starts
Valve control system 10 years 250 000 starts
Pressure switch 10 years 250 000 starts
Ignition system with flame guard 10 years 250 000 starts
UV flame sensor 10 000 hrs N/A
Gas pressure regulators 15 years N/A
Gas valve without seal testing 10 years 250 000 starts
Gas valve with seal testing Replacement upon fault detection N/A
Gas pressure switch 10 years 250 000 starts
Safety blow-off system 10 years N/A
Damper motor N/A 500 000 starts
Contactor 10 years 500 000 starts
Burner 1 year 3 000 hrs
Inspection of electrical installation 1 year 3 000 hrs
Leakage check 1 year 3 000 hrs
Filter 1 year replacement at Δp>10 mbar 3 000 hrs replacement at
Δp>10 mbar
Electrodes Replacement/Cleaning 1 year Replacement/Cleaning 3 000 hrs
Brake disc Replacement/Cleaning 1 year Replacement/Cleaning 3 000 hrs
Motor 1 year 3 000 hrs
Fan wheel 1 Year
Replacement when cleaning
needed/imbalance
3 000 hrs
Replacement when cleaning
needed/imbalance
The burner and its components must be recycled according to applicable regulations.
Burner servicing schedule
Servicing must be carried out once a year or after 3 000 hours of operation.
Component replacement intervals
Delivery check
• Make sure everything is delivered and the goods have not been
damaged during transit.
• If something is wrong with a delivery, report it to the supplier.
• Transport damage must be reported to the shipping company.

7Bentone
172 525 07-3
Type Length of
burner tube
Flange
measure A
Burner tube
measure B
Burner tube
measure C
BG 700 Standard 1 363 328 220 205
Standard 2 663 628
D E F G H I
BG 700 820 410 510 *730 *970 420
* The above dimensions are max. measurements. Depending on the
components used, the measurements may vary.
E
H
I
C
B
E
F
G
D
A
Min. recommended distance to
floor. 200mm
2. Technical data
Burners are intended for use at:
• Water heating generators.
2.1 Dimensions
• Connection 1½-3".
2.1.1 Heat generator connection dimensions
K
L
M
K L M
BG 700 M14 (Ø 280) Ø320-380 ***(Ø 210) Ø 230
***Dimensions when installing blast tubes from the inside of the heat
generator.

8Bentone
BG 700
360
G20 300-1500 31.2 157.1
G25 300-1500 36.2 183
G31 380-1650 15,4 67.1
kWh/Nm3MJ/Nm3kcal/Nm3
G20 9.5 34.02 8126
G25 8.2 29.25 6986
G30 32.5 116.09 27728
G31 24.6 88.00 21019
6,0 21,60 5159
Capacity kW Gas quantity
at min. power
Nm3/h 1)
Gas quantity
at max. power
Nm3/h 1)
Max. connection
pressure mbar
Min connection
pressure mbar
BG 700
G20 300-1500
see data plateG25 360-1500
G31 380-1650
Lower heat value Hu at normal state 15°C and 1013.25 mbar EN676
Grade of gas
Natural gas
Natural gas
Butane
Propane
Biogas
Gas quantity and capacity vary according to grade of gas and connection
pressure.
2.2 Capacity range
2.3 Gas categories approved gases
When using biogas, only dry gases with a max. 0.1% H2S is used.
The gas must contain a methane content of at least 50%.

9Bentone
Type BG 700
Motor 230/400V, 10.4/5.4A, 50Hz
The recommended main fuse motor C16A
Control power 1~230V, 2.5A, 50Hz
Sound 93 dBA ± 0.5 dBA
!Do not exceed
working field.
Burner correspond to IP20
2.5 Electric Specification EN 60335-2-102
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.
!If biogas is used,
the work field may
change due to the
composition of the
gas.
2.4 Working field
BG 700-2, BG 700 M
-2
0
2
4
6
8
10
12
14
200 400 600 800 1000 1200
mbar
kW
300-1200 kW
160303-252
-2
0
2
4
6
8
10
12
14
200 400 600 800 1000 1200 1400 1600
mbar
kW
G20, G25 300-1500 kW
G30, G31 380-1650 kW
160303-251
Biogas

10 Bentone
2.6 Description BG700-2
Components
1. Flame cone
2. Guide bar
3. Electric panel
4. Fan wheel
5. Fan house
6. Shrouded disc
7. Ignition electrode
8. Nozzle
9. Ionisation electrode
10. Motor
11. Connection gas fittings
12. Ignition transformer
13. Air damper
14. Air damper motor
15. Air pressure switch
16. Fuse holder
17. Indicating lamp Stage 2
18. Switch l-ll
19. Indicating lamp Stage I
20. Switch l-ll
21. Time meter, stage 1
22. Time meter, stage 2
23. Contactor with thermal
overload protection
24. Control box
25. Gas train
26. MultiBloc

11Bentone
172 515 03-2
3. General instructions
3.1 General instructions
The installation of the gas burner must be carried out in accordance with
current regulations and standards. The installers of gas burners should
therefore be acquainted with all regulations and ensure that the installation
complies with the requirements. The installation, mounting and adjustment
should be made with the greatest care and only the correct gas should be
used.
3.2 Installation and maintenance
instructions
The maintenance instructions supplied with the burner must be kept at an
easily accessible location in the boiler room.
3.3 Instructions
The user should be thoroughly in-structed in the function of the gas burner
and the whole installation. The supplier must instruct the user.
3.4 Inspection and maintenance
The unit must be serviced and maintained at the interval specified in the
service schedule. If the burner is in a dirty environment, service should be
done at more frequent intervals than specified.
3.5 Start up
After the burner has been fitted to the boiler and the electric connection, the
leakage control, the venting and the electric function test have been carried
out, the burner will be ready for start-up.
Howerer, study the sections dealing with adjustments of multi-bloc,
combustion air and combustion head. Open the ball valve and switch on the
main switch. If the burner starts the actual adjustment can be made.
3.6 Commissioning of installation
Control of the combustion. The combustion quality is checked by means
of a flue gas analysis device. Adjust the burner to appr. 20% excess air in
accordance with the table. Check the flue gas temperature. Calculate the
efficiency. Check also the actual gas volume on the gas meter so that the
correct input is achieved.

12 Bentone
172 515 03-2
4. Installation
4.1 Delivery check
Check that all has been delivered and that the goods have not been
damaged during transport. If that is not the case, please notify the delivery
company. Transport damages should be reported to the forwarding agency.
4.2 Preparations for installation
Check that the measurements and capacity range of the burner are
compatible with the boiler. The power ratings on the type plate refer to the
min. and max. power of the burner.
4.3 Gas supply
For good operating safety, it is important that the gas supply system is
installed correctly.
Consider the following:
1. Check that the burner is approved for the gas quality of the installation.
If not, please contact the supplier.
2. Check that the gas components of the burner are approved for
indicated gas pressure.
3. The gas supply system should be installed in accordance with current
standards.
4. Pipe lines should be run so that service on boiler and burner is
facilitated.
5. Pipe lines should be run so that eventual contaminants cannot come
into contact with the gas components.
6. Gas discharge system must be installed prior to local regulations.
4.4 Electric connection
Before starting the electric installation, the main switch must be turned off.
If the boiler has a 7-pole and a 4-pole Eurostecker connector, these usually
fit directly to the burner. If not, use the connectors included, (see connection
under Electric equipment).
4.5 Setting brake plate and air flow
Before the placing into service, the burner should be initially set according to
diagram, (see Basic settings). Note that it is only a basic setting which should
be adjusted once the burner has been started.
!If an electric connection other than the one recommended by Enertech is used, a
risk of damage and injury can arise.

13Bentone
172 515 37
!The lifting aids we use
here are available as
accessory,
4.6 Handling and lifting instruction
4.6.1 BG 700 - BG 900
1
2
3
1
2
1
3

14 Bentone
172 515 38 2018-01-15
4.7 Mounting on the boiler
Mount the burner to the boiler using 4 bolts. See technical data for the hole
pattern.
To make the fitting process easier, it is possible to separate the burner body
from the gas flange with the combustion head and valve assembly in place.
Proceed as follows:
1. Ensure that no power is going to the burner. Break the main current
and disconnect the Euro plugs from the burner. NB: If the burner is
directly connected, ensure that all components on the burner are
without power.
2. Remove the cover plate from the fan housing.
3. Disconnect the electrical cables to the valve assembly and gas damper
motor.
4. Undo the screws (B) on both sides.
5. Undo the end stops (C) on the guides.
6. Disconnect the ignition cable and ionisation cable from the gas nozzle.
7. Pull out the burner body from the guides and put it in a suitable place.
After separating the burner body and the gas flange, it is easier to mount
the gas flange with the burner head and valve assembly to the boiler (loosen
the valve assembly if required). Once the gas flange is fitted to the boiler, it
is easy to lift the burner body up onto the guides. Assemble the burner in
reverse order to its disassembly.
Service position
!Check the gas tightness.
!For maintenance of the brake plate, nozzles, electrodes etc, when using a long
design of the burner tube, you have to remove the nozzle assembly from the
connecting pipe and move the assembly backwards in the fan housing (from the
boiler).

15Bentone
172 515 39 2018-03-22
Service position
4.8 Inspection of gas nozzle before
commissioning
The gas nozzle can easily be inspected by using the guides on the burner.
Proceed as follows:
1. Ensure that no power is going to the burner. Switch off the main power
supply and disconnect the Euro plugs from the burner.
2. Remove the cover plate from the fan housing.
3. Disconnect the ignition cable and ionisation cable for the gas nozzle.
4. Ensure there is enough slack in the electrical cables to the valve
assembly and gas damper motor to pull out the burner body in the rear
position on the guides. If there is not enough slack the cables can be
disconnected.
5. Undo the screw (B) on both sides.
6. Pull out the burner on the guides.
7. Undo the screw(s) (A) on the gas flange.
8. Take out the gas nozzle.
9. See section Gas nozzle
Re-assemble the burner in reverse order to that described above. When re-
assembling, make sure that the O-ring located between the gas nozzle and
the gas flange is in the correct position when the nozzle is re-fitted.
!If the burner is directly connected, ensure that all
components on the burner are without power.

16 Bentone
4.9 Leakage control
When making a leakage control of the gas supply system the solenoid valve
should be closed. Connect a pressure gauge to the test nipple Pa, see fig.
The test pressure in the system should be 1,5x max. inlet pressure or min.
150 mbar. If any leakage, locate the source by means of soapy water or a
leak location spray. After tightening repeat the test.
Electric function test:
Ensure that phase and neutral are not reversed. The gas shut-off cock
should be closed.To prevent the gas pressure switch from locking out it
should be linked temporarily.
After the main switch has been switched on and the thermostats have been
adjusted the pre-purging period begins (30-35sec.). At the end of this period
the pre-ignition period starts (0,5-2,5 sec. dependent on the design of the
gas control). The gas valve is energized and opens and flame is established.
At the end of the safety time (2-3 sec.) the gas control locks out. The
solenoid valve and the motor will be ”dead”. Remove the link from the gas
pressure switch after the test is finished.

17Bentone
45°
Natural gas Propan
Biogas (UV-detektor)
4.10 Gas nozzle

18 Bentone
172 511 14-2 2021-05-03
4.11 Setting Damper motor 2-stage
Release button
High load (red)
Low load (orange)
Closed air damper (blue)
Solenoid valve High load (black)
Air adjustment
The damper motor rotates the air damper between
three preset positions: completely closed, low load and
high load. These positions are controlled in the motor
by colored cam discs, the black cam disc controls the
switching on/off of the solenoid valve. Adjust the amount
of air by changing the position of the cam discs.
Blue cam disc is the limit position for closed air dampers
and does not normally need to be changed.
Low load
• Set control switch for load position to position II
(high load).
• Turn orange cam disc to 0° to reduce airflow and
to 90° to increase airflow.
• Return the control switch to position I (low load)
and check the combustion values.
High load
• Set control switch for load position to position I
(low load).
• Turn red cam disc to 0° to reduce airflow and to
90° to increase airflow.
• Place black cam disc in a position between red
and orange cam discs and adjust to obtain a good
load change.
• Return the control switch to position II (high load)
and check the combustion values.
Release
By pressing the button, the motor is disengaged and the
air damper can be turned. The function is used when
servicing air dampers.

19Bentone
172 515 40 2018-01-15
!Be careful when adjusting the air pressure switch;
it contains a live component.
Inställningsområde ca:
LGW 10 1-10 mbar
LGW 50 2,5-50 mbar
5. Setting the burner
5.1 Setting the air pressure switch
The air pressure switch should block the burner if the air quantity supplied
for combustion is insufficient. The air pressure switch must be set so that,
if there is a defective air supply at the burner’s max. or min. capacity, it
reacts before the monitored pressure falls so much that it results in poor
combustion.
Setting for air pressure switch
1. Remove the protective cover, screw (Y).
2. Start the burner.
3. Carefully turn the scale on the air pressure switch clockwise until the air
pressure switch stops the burner. Is the tolerance on the scale for
the min. air pressure switch approx. ±15%?
4. Try to find the pressure at which the burner stops for both the
minimum and maximum input power by turning the scale. Make a note
of the values and then set the air pressure switch on the basis of the
highest pressure noted at which the burner stopped.
5. The air pressure switch should be set to a pressure approx.
10–15% lower than the highest noted pressure at which the
burner stopped.
6. After setting the air pressure switch, perform repeated
starts and run through the burner’s set output range several
times. This is to ensure the reliable function of the burner. If
breakdowns or interruptions occur, the air pressure switch is
probably set to a too narrow position.
7. Fit the protective cover, screw (Y).
Y
Y

20 Bentone
5.2 Setting the min. gas pressure
switch
The min. gas pressure switch should react to a burner connection pressure
that is too low and in such cases prevent the burner from starting. If the
connection pressure to the burner is too low during operation, the min. gas
pressure switch should stop the burner. The burner can start again once
the connection pressure has risen above the pressure set for the min. gas
pressure switch.
Setting for min. gas pressure switch
1. Remove the protective cover, screw (Y).
2. Open the pressure outlet (X) and connect a manometer to measure the
connection pressure.
3. Start the burner.
4. Measure and make a note of the connection pressure to the burner
during normal operation at the highest input power.
5. Based on the desired connection pressure set, determine the
connection pressure at which the gas pressure switch should stop the
burner. Set the connection pressure at which the burner is stopped at
a level where the burner is stopped before poor combustion occurs.
6. Set the min. gas pressure switch to this value by turning the scale.
7. Check the setting by carefully closing the ball valve while measuring the
connection pressure.
8. When the min. gas pressure switch stops the burner, the value
measured should then approximately correspond to the setting on the
min. gas pressure switch. The tolerance on the scale for the min. gas
pressure switch is approx. ±15%.
9. Open the ball valve.
10. Remove the pressure gauge and close the pressure outlet (X).
11. Fit the protective cover, screw (Y).
!Check the gas tightness.
X
Y