Bentone BG 300-2 Technical specifications

Providing sustainable energy solutions worldwide
178 001 72-4 2018-03-23
Installation- and maintenance instruction
BG 300-2

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General
Table of contents
1. General Information _____________________________________________ 4
2. Technical data __________________________________________________ 7
2.1 Burners are intended for use at: ________________________________ 7
2.2 Dimensions _________________________________________________ 7
2.3 Description BG 300 _________________________________________ 10
3. General instruktions ____________________________________________ 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 Skeleton diagrams __________________________________________ 13
4.6 Mounting on the boiler _______________________________________ 14
4.7 Inspection of gas nozzle before commissioning __________________ 15
4.8 Gas nozzle _________________________________________________ 16
4.9 Setting Air damper __________________________________________ 17
4.10 Air adjustment ______________________________________________ 17
4.11 Low load: __________________________________________________ 17
4.12 Full load ___________________________________________________ 17
5. Setting the burner ______________________________________________ 18
5.1 Adjustment of brake plate ____________________________________ 18
5.2 Control of burner head _______________________________________ 18
5.3 Setting the air pressure switch ________________________________ 20
5.4 Setting the min. gas pressure switch ___________________________ 21
5.5 Multiblock MB-ZRDLE 405-412 _______________________________ 22
5.6 Recommended excess air when using default setting _____________ 25
5.7 Determining the gas quantity for the system _____________________ 25
5.8 Calculating the quantity of gas supplied ________________________ 27
6. Service________________________________________________________ 28
6.1 Servicing the combustion assembly ____________________________ 28
6.2 Replacement of damper motor, air _____________________________ 29
6.3 Flame monitoring and ionisation current check___________________ 30
6.4 UV-Detector________________________________________________ 31
7. Handing over of the installation __________________________________ 32
8. Fault location, functional troubles________________________________ 32
9. Electric equipment _____________________________________________ 33
9.1 Safety system ______________________________________________ 33
9.2 Wiring diagram LME _________________________________________ 34
9.3 List of components__________________________________________ 35
9.4 Control program at faults; fault mode indicator LME .... ___________ 36
10. Troubleshooting _____________________________________________ 38
11. EU Declaration of conformity _________________________________ 41
13. General instructions for gasburners____________________________ 42

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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.
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• 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.

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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 10000 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 3000 hrs
Inspection of electrical installation 1 year 3000 hrs
Leakage check 1 year 3000 hrs
Filter 1 year replacement at ∆p>10 mbar 3000 hrs replacement at ∆p>10
mbar
Electrodes Replacement/Cleaning 1 year Replacement/Cleaning 3000 hrs
Brake disc Replacement/Cleaning 1 year Replacement/Cleaning 3000 hrs
Motor 1 year 3000 hrs
Fan wheel 1 Year
Replacement when cleaning
needed/ imbalance
3000 h
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 3000 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.

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1.2.1 Heat generator connection dimensions
Type Length of burner
tube
Flange
measure A
Burner tube
measure B
Burner tube
measure C
BG 300 Standard 1 145 125 ø120 ø110
Standard 2 245 225 ø120 ø110
K L M
BG 300 M10 Ø 175-240 ø125 (***115)
D E F G H I J
BG 300 372 220 100 *380 *460 170 **200
2. Technical data
2.1 Burners are intended for use at:
• Hot water boilers in intermittent operation
2.2 Dimensions
• Gas connection ¾-2”
* The above dimensions are max. measurements. Depending on the
components used, the measurements may vary.
** Min. recommended distance to floor.
***Dimensions when installing blast tubes from the inside of the boiler
AF
B
C
D
E
G
H
I
**J
K
L
M
Dimensions stated in mm

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2.2.1 Gas categories, approved gases
Only dry gas is permitted for use
2.2.2 Capacity range
Gerätekategorien
Appliance categories
Versorgungsdrücke
Supply pressures
Besimmungsländer
Countries of desinaion
II
2R/3R
20-360mBar BG, CZ, DE, EE, ES, FR, GR, HU, IS,
IT, LU, LV, NO, PT, SI,
All countries
II
2H3B/P
20-360mBar AT, CH, CY, DK, FI, LT, RO, SE,
SK
II
2H3P
20-360mBar GB, IE,
II
2L3B/P
20-360mBar NL, RO
II
2E3B/P
20-360mBar PL
I
2E(R)B
20-360mBar BE
I
3P
20-360mBar BE
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
See data plate
Lower heat value Hu at normal state 15°C and 1013.25 mbar EN676
Grade of gas
Natural gas
Natural gas
Butane
Propane
Gas quantity and capacity vary according to grade of gas and connection
BG 300
G20 50-200 5.2 21 360
G25 50-180 6,1 21.9 360
G30 65-200 2.6 8.1 360
G31 50-200 1.5 6,1 360
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

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2.2.3 Electric Specification EN 60335-2-102
Burner correspond to IP20
Type BG 300
Motor 180W 230V 1,3A 50Hz
The recommended main fuse
motor C10A
Control power 230V 2,1A 50Hz
Sound 82 dBA ± 0,5 dBA
2.2.4 Working field
BG 300
G20,G31 50-200 kW
BG 300
G30 65-200 kW
G25 50-180 kW
-1
0
1
2
3
4
40 60 80 100 120 140 160 180 200 220 kW
G20, G31
mbar
-1
0
1
2
3
4
40 60 80 100 120 140 160 180 200 220 kW
G30, G25
mbar
!Do not exceed working
field
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.

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2.3 Description BG 300
Components
1. Switch 0-1
2. Switch I-II
3. Cover, inspection glass
4. Reset button
5. Air pressure switch
6. Damper motor
7. Inner assembly adjustment
(not town gas)
8. Flame cone
9. Connection gas fittings
10. Air damper
11. Air intake
12. Ignition electrode
13. Electric panel
14. Indicating lamp Stage 2
15. Indicating lamp Stage 1
16. Fan wheel
17. Motor
18. Ionization electrode
19. Transformer
20. Inner assembly
21. Nozzle
22. Brake plate

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3. General instruktions
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
See service schedule.
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.

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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.
(Refer to connection under Electric equipment)
!If an electric connection other than the one recommended by Enertech is used, a risk of damage and
injury can arise.

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4.5 Skeleton diagrams
1. Ball valve
2. Filter
3. Governor
4. Pressure gauge with shut-off cock
5a. Gas pressure switch, mini
5b. Gas pressure switch, maxi
6a. Main valve, 2 -stage. When modulaing operation is required this
valve is equipped with controls for variable opening.
6b. Safety valve
1)7. Valve proving system
9. Air pressure switch
10. Gas burner control
Pos. 5b, 7: Components not required according to EN 676.
1) Required over 1200 kW according to EN 676.hhh

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4.6 Mounting on the boiler
Remove the combustion unit from the burner. Fit the enclosed flange and
gasket to the boiler. If new fixing holes must be drilled, use the fixing flange
as a pattern.
Removal of valve unit from burner
Remove the plug-in contact from the multi-bloc. Loosen the union nut.
Removal of fan house unit from burner.
Remove the screws (A). Swing out the fan housing. Remove the ionisation
and ignition wires from the electrodes. Remove the bolt (B) on the spectacle
flange. Lift away the fan housing.
Installation example
Connect the gas to the burner by means of the ball valve. Ensure that
the union nut, ball valve and tubing make it easy to remove the burner for
inspection and service.
B
A
!Check the gas tightness.
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4.7 Inspection of gas nozzle before
commissioning
General rules
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.
Gas nozzle
Check that the ignition and ionisation electrodes are correctly set. In
the figure (see the gas nozzle chapter), the dimensions are specified for
adjustment of the ignition and ionisation electrodes.
Gas quality
Ensure that the burner head is meant for the gas quality to be used (see
capter gas nozzle).
De-aerating
De-aerating of the gas line is conducted, for example, by unscrewing
the screw on the measuring nipple for the connection pressure. Connect
a plastic hose and release the gas in a safe place. Once de-aerating is
completed, be sure to refit the screw on the measuring nipple.
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.
Note on 2-stage and modulating burners that during the pre-purging period
the damper opens to the set value for air on stage 2 and just before the
end of the pre-purging period it goes down to the air setting for stage 1. On
some burners under 350kW the pre-purging mainly takes place with the air
damper set for stage 1.
!If the burner is directly
connected, ensure
that all components on
the burner are without
power.

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4.8 Gas nozzle
Natural gas
Propan
Biogas (UV detector)
2,5
8,0

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4.9 Setting Air damper
4.10 Air adjustment
The damper motor turns the damper between three pre-set positions:
fully closed, low load, full load. These positons are controlled in the motor
by cams of different colours. The black cam controls the gas valve for full
load. If the air volume needs changing: Remove the cover of the damper
motor and change the position of the cams by turning them with the tools
accompanying the burner.
4.11 Low load:
Adjust the operating switch to full load (ll).
-* Reduce the air volume: Turn orange cam towards 0°
-* Increase the air volume: Turn orange cam towards 90°
Adjust the operating switch back to low load and check the air volume.
4.12 Full load
Adjust the operating switch to low load.
-Reduce the air volume: Turn red cam towards 0°
-Inrease the air volume: Turn red cam towards 90°
If the red cam is moved, change the black cam as much. Adjust the
operating switch to low load and check that the correct air volume has been
obtained.
Note! The blue cam is the limit position for fully closed damper and it is
normally not necessary to change it.
Releasing button
By pressing the button and snapping it down, the motor will be released and
the damper can easily be turned. This function facilitates an exchange of
damper motor.
Releasing button
N.B! The upper position is
the standard positiont
High capacity (red)
Low capacity (orange)
Closed damper (blue)
Solenoid valve
High capacity (black)

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5. Setting the burner
5.1 Adjustment of brake plate
-Loosen the screw on the adjustment device.
-To reduce the opening: turn the knob to the left.
-To increase the opening: turn the knob to the right.
The adjustment of the position of the brake plate affects the air flow. It is
therefore always necessary to make a fine adjustment of the air by means of
the adjustment device of the burner.
5.2 Control of burner
head
To check the burner head, brake plate and
electrodes proceed as follows:
Loosen the nuts a. Swing out the burner. Remove
the screw b and the knob for adjustment of burner
head. Loosen the screw c so much so that the
inner assembly can be pulled out.
Control of burner head
Adjustment of inner assembly

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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.
Operating instructions
The installation and maintenance instructions supplied
with the burner must be kept at an easily accessible
location in the boiler room.
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.
Inspection and maintenance
Inspection as needed, preferably daily. Maintenance per
service schedule.
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.
Adjustment of burner head
The burner is equipped with an adjustment device
changing the position of the brake plate in the burner
head. This is used to adjust the correct pressure drop
over the combustion device in order to obtain a good
pulsation free combustion.
Which position to use depends on input and
overpressure in the boiler.
A general rule is that the lower capacity the smaller the
opening between brake plate and combustion device.
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
Service
Service should only be carried out by qualified personnel.
Replacement parts should be of the same make and
approved by the same authorities as the original. If the
burner is converted to fire another gas quality it must
be re-commissioned. If town gas is to be fired the
combustion head must be converted and the gas train
adjusted to suit (e.g.a larger gas armature or a different
spring in the governor may be required).
Gas quality CO2%
lambda 1,2
02% max. CO2%
Natural gas 10,0 3,5 11,9
LPG 11,5 3,5 13,9

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!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
5.3 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