Enertech Bentone BG 300-2 Technical specifications

Providing sustainable energy solutions worldwide
178 001 72-3 2017-10-12
Installation- and maintenance instruction
BG 300-2

172 205 32 08-01
DESCRIPTION
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. 
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

Capacity chart according to EN 676
Output range
TECHNICAL DATA
The above dimensions are max. measurements. Depending on the compo-
nents used, the measurements may vary.
172 215 12 14-01
Length of burner tube Measure A Measure 5
Standard 145 125 ø120
Long design 245 225 ø120
100 372
220
475
B
A
ø108
185
470
Type designation BG 300
Dimensions
Capacity
kW
Gas volume at a
min.
output Nm3/h 1)
Gas volume at a
max
output Nm3/h 1)
Max. inlet
pressure mbar
Rated inlet
pressure mbar
G20, Natural gas 50-200 520 300 20
G31, Propane 50-200 1,9 7,7 300 30
G25, Natural gas 50-180 6,3 22,5 300 25
G30, Butane 65-200 1,9 5,9 300 30
Connection Motor Ignition transformer
Natural gas, Propane, Butane 1-phase, 0,18 kW, Primary 230 V, 1, A
1" 2 800 r/m, 230 V Secondary 8 000 V
1 
G20 Natural gas 10,0 kWh/Nm3
G25 Natural gas 8,0 kWh/Nm3
G31 Propane 26 kWh/Nm3
G30 Butane 34 kWh/Nm3
Gas quantity and capacity vary ac-
cording to grade of gas and connec-
tion pressure.
1) A heat value in kWh/Nm3is used for the underlying calculation in normal


TECHNICAL DATA
172 215 29 08-01
DIMENSIONS OF FLANGE
ø175-240
M10
ø120

SKELETON DIAGRAMS, 2-STAGE- OR MODULATING BURNERS
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 equippedwithcontrols
for variable opening.
Incorporated in the MultiBloc
6b.Safety valve
1)7.Valve proving system
8.Air damper motor
9.Air pressure switch
10.Gas burner control

according to EN 676.
1) Required over 1200 kW according
to EN 676.
172 415 05 07-01
When Bio gas is used, Bentone shall always be contacted.
!

Removal of fan house unit from
burner.
Loosen the screws. Swing out the fan
house. Remove the ionisation and
ignition cables from the electrodes.

Remove the combustion unit from the
     


as a pattern.
Removal of valve unit from burner
Remove the plug-in contact from the
multi-bloc. Loosen the union nut.
absolutely straight.
MOUNTING ON THE BOILER
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.
172 205 42 07-01

172 425 28 16-01
ELECTRIC EQUIPMENT Gas burner control: LME22 Wiring diagram
If there is no Plug-in
contact (X4,X6) on the
boiler, connect to
the contact enclosed.
If S6 is missing connect T6 and T8.
1(4)

172 425 28 16-01
ELECTRIC EQUIPMENT
Gas burner control: LME22
Function
1. Operating switch ON-Thermostat ON-Gas pressure switch ON-Air damper closed.
A control is made that the air pressure switch does not indicate fan pressure. Then the
burner motor starts.
2. Air damper motor opens.
The air damper motor opens the damper to full load. A control is made that the air pres-

3. Air damper motor closes.
The air damper motor closes to low load . Then the ignition spark is formed.
4. Main and safety valves open

5. The safety time expires.


6. Operating position.
The burner is in operating position and can now change over to full load if the operat-
ing switch and the thermostat for full load are in positon ON. The burner can alternate
between full and low load depending on set temperature.
7. Stop.
The operation of the burner can now be interrupted by means of the operating switch or
the thermostat.
• The control locks out.
The red lamp in the control is lit. Restart the burner by pressing the reset button.
2(4)
List of components
A1 Gas burner control
B1 Ionization electrode
F1 Operating fuse
H1 Lamp, low capacity
H2 Lamp, high capacity
H3 Alarm signal 230 V
M1 Burner motor
M2 Damper motor, L&S SQN75.254.A21B
P1 Time meter, total operating time
P2 Time meter, high capacity, total operating time
S1 Operating switch
S2 Operating switch, stage 2
S3 Control thermostat
S4 Temperature limiter
S5 Micro switch for hinged door
S6 Control thermostat, stage 2
S7 Main switch
S8 Air pressure switch
S9 Gas pressure switch
T1 Ignition transformer
X1 Connection terminal board
X2 Earth terminal
X3 Plug-in contact, burner
X4 Plug-in contact, boiler
X5 Plug-in contact, stage 2, burner
X6 Plug-in contact, stage 2, boiler
Y1 Gas solenoid valve 1
Y2 Gas solenoid valve 2
Mains connection in accordance with local regulations.

172 425 28 16-01
ELECTRIC EQUIPMENT
Control diagnosis under fault conditions and lockout indication
Gas burner control: LME....
Colour codes
Diagnostics alarm trigger
The red alarm signal lamp lights continuously after the alarm is disconnected.

Limit on start attempts

or goes out during operation. LME 11 … permits a maximum of three start attempts if
the start cycle is uninterrupted.
Continuous
Off
Red
Yellow
Green
Colour code table for multi-coloured signal lamps (Light diodes)
Status Colour codes Colours
Waiting time «tw», other waiting times ○………………… Off
Ignition phase, ignition checked •○ •○ •○ •○ •○ • Flashing yellow
Normal operation  Green
  Flashing green
  Green-Red
Undervoltage  Yellow-Red
Disruption, alarm  Red
Flashing code for fault codes  Flashing red
Interface diagnostics  

AL
FS
Flash code Pause Flash code
Approx. 3 s
lights red Press the reset
button > 3 s
3(4)

172 425 28 16-01
ELECTRIC EQUIPMENT
Control diagnosis under fault conditions and lockout indication
Gas burner control: LME...
During alarm trigger diagnostics, control outputs are to be disconnected from all
power.
- The burner is disconnected
- Exception, the «AL» alarm signal at connection block 10
The burner is only to be reconnected after it is reset
- Press the reset button 0.5...3 s
Interface diagnostics
To switch to interface mode, hold the reset button depressed for more than 3 s. To

unit is in the alarm mode, it is reset by pressing the reset button 0.5...3 s.

Alarm control table

on signal lamp
(LED)
Possible causes
Flashing 2 x
••

- 
- Defective or obscured fuel valves
- Poor burner installation
- Defective ignition unit
Flashing 3 x
•••
«LP» defective
- No air monitor signal after «t10»
- «LP» is welded in the open position
Flashing 4 x
••••

Flashing 5 x
•••••
Time out «LP»
- «LP» is welded in the closed position
Flashing 6 x
••••••
Free
Flashing 7 x
•••••••

- Poor burner installation
- Defective or obscured fuel valves
- 
Flashing 8 x
••••••••
Free
Flashing 9 x
•••••••••
Free
Flashing 10 x
••••••••••
Connections fault or internal fault,
outgoing contacts or other fault
Flashing 14 x
••••••••••
••••
CPI contact not closed
A1 = LME
GP
R/W
L N
br bl rt sw
sw rtQ1 = AGQ 3...
QRA
11112 2
4(4)

MEASURES AND CHECKS BEFORE START-UP,
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/mainte-
nance.
Inner assembly
Ensure that the ignition and ionisation
electrodes are correctly adjusted. The
sketch shows the correct measure-
ments.
Gas quality
Ensure that the burner head is meant

Venting
The gas line is vented by loosening the
screw on the test nipple for the inlet
pressure. Connect a plastic hose and
conduct the gas into the open. After
having vented the gas line tighten
the screw again.
Leakage control
When making a leakage control of the
gas supply system the solenoid valve
should be closed. Connect a pressure

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
     
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

172 205 34 07-01
Leakage control
Gas train
Note on 2-stage and modulating burn-
ers 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.
NOTE! Applies only to gas burner
control LFL1.
When using LPG (Propane) the burner
should be connected for post-purge.
Move connection to terminal 6 to ter-
minal 7 in the base of LFL1.
2-STAGE- OR MODULATING BURNERS
MultiBloc

MEASURES AND CHECKS BEFORE START-UP
172 205 78 07-01
INNER ASSEMBLY
Town gas
INNER ASSEMBLY
Natural gas, LPG
INNER ASSEMBLY
Biogas (UV-detector)
Natural gas
LGP
2,5
8

172 205 16 07-01
If the barometer height, pressure and temperature of the gas deviate very much from the normal values this must

f = 273+t . 1013,25
273 B+Pu
t = 
B = Barometer height (945 mbar)
Pu= Pressure of the gas at the gas meter (15,0 mbar)
f = 273+15 . 1013,25
273 945+15
f = 11,1
The gas volume read on the gas meter actually reads 1,11 .12,9 = 14,4 m3/h.

Gas quality kWh/Nm3kJ/Nm3kcal/Nm3
Natural gas 10,3 37 144 8 865
Propane 26,0 93 647 22 350
Butane 34,3 123 571 29 492
Town gas 4,9 17 653 4 213
Bio gas 7,0 25 219 6 019
V = Gas volume Nm3/h
Q = Boiler output 120 kW
Hu=3, B. 10.3 kWh/Nm3
η=
Ex. A v= Q .3 600 =120 .3 600 ≈12,9 Nm3/h
Hu
· η37 144 .0,90
Ex. B v= 120 ≈12,9 Nm3/h
10,3 · 0,90
Example how to calculate the gas volume (natural gas)
DETERMINATION OF GAS VOLUME FOR THE INSTALLATION

gas and bio gas vary. For more exact
information please contact the gas
distributor.

172 305 70 08-01
Air adjustment
The damper motor turns the damper

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.
Low load:
Adjust the operating switch to full
load (ll).
* 

* 

Adjust the operating switch back to
low load and check the air volume.
Full load
Adjust the operating switch to low
load (l).
* 

* 

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.

Remove the cover of the damper
motor and change the position of the
cams by turning them with the tools
accompanying the burner.
FUNCTION, 2-STAGE DESIGN
Solenoid valve
High capacity (black)
High capacity (red)
Low capacity (orange)
Closed damper (blue))
Releasing button
N.B. The upper
position is the
standard position

172 505 39 16-01
MULTI-BLOC, MB-ZRDLE 405-407


405 - 412 S50 = 4 - 50 mbar
415 - 420 S20 = 4 - 20 mbar
415 - 420 S50 =20 - 50 mbar

with adjustable start load, stage 1
and stage 2.
1(2)
Components
1. Gas pressure switch
2. Inlet pressure
3. Governor with pressure adjustment
4. Hydraulic device, adjustment of
stage 2
5. Protective cover, start gas adjustment
6. Lock screw for flow adjustment
7. Main valve
8. Knob for adjustment of stage 1
9. Test nipple, pressure after governor
10. Test nipple for nozzle pressure
11. Filter
12. Fixing flange
13. Ball valve
1
2
34
5
6
7
9
11
12
10
8
13

172 505 39 16-01
Flow adjustment 2-stage design
For stage 1, loosen the lock screw



For stage 2, turn the hydraulic



Do not forget to tighten the lock
screw again.
ADJUSTMENT OF MULTI-BLOC, MB-ZRDLE 405-420
Adjustment of governor
Adjust outlet pressure from governor
by means of a screw driver. Min. and
max. outlet pressures correspond to
appr. 60 turns of the spring. It is not
possible to change pressure springs in
order to change the outlet pressure.
Turn to the right = the outlet pressure
is increased
Turn to the left = the outlet pressure
is reduced

Remove the protective cover c.
Turn the adjustment knob d (use the
protective cover as a tool) to the de-


is reduced

increased
Adjustment of governor
Multi-bloc MB-ZRDLE 405-420

Flow adjustment
2(2)

GENERAL INSTRUCTIONS
Adjustment of burner
The burner is from the factory pre-set
to an average value that must then be
adjusted to the boiler in question.
All burner adjustments must be made
inaccordancewithboilermanu-facturers
instructions. These must include the
    
average water temperature and CO2
or O2concentration.
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 regu-
lations 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 operating instructions accom-
panying the burner should be left
in a prominent position in the boiler
room.
Instructions
The user should be thoroughly
instructed in the function of the gas
burner and the whole installation.
The supplier must instruct the user.
Inspection and maintenance
Daily inspection is advisable.
Start up
      
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, com-
bustion 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 adjust-
ment 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.
172 305 28 07-01
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 com-
bustion quality is checked by means


in accordance with the table. Check


gas volume on the gas meter so that
the correct input is achieved.
Service
Service should only be carried out

parts should be of the same make and
approved by the same authorities as
the original. If the burner is converted

re-commissioned. If town gas is to 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

172 305 29 07-01
GENERAL INSTRUCTIONS
Adjustment of brake plate
- Loosen the screw on the adjust-
ment device.
 
knob to the left.
 
knob to the right.
The adjustment of the position of

It is therefore always necessary to

means of the air adjustment device
of the burner.
Control of burner head
To check the burner head, brake plate

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.
Adjustment of inner assembly
Control of burner head

172 305 25 16-01
Flame monitoring and measure-
ment of ionisation current
The burner is monitored according
to the ionisation principle. Check the
ionisation current on start-up and on
each service call.
The reason for a low ionisation current
may be leaking currents, bad connec-
tion to earth, dirt or a faulty position

head. Sometimes also a faulty gas/air
mixture may cause too weak a ionisation
current.
The ionisation current is measured
by means of a microampere meter
(µA) connected in series with the
   
control.

required ionisation current according
to table. In practice this current must
be considerably higher, preferably
more than 10 µA. All the gas burners
are equipped with a ionisation cable
that can be slit which facilitates the
connection of the µA-device.
Gas pressure switches:

2,5-50 mbar GW 50
5-150 mbar GW 150
Adjustment of min. gas pressure
switch
The min. pressure switch should react
if the gas pressure is too low and
prevent the burner from starting. Too
low a gas pressure during operation
should stop the burner. The burner
may start again when the rated gas
pressure has been reached.
Remove the protective cover. Connect
a pressure gauge for measuring the
rated pressure. Decide on pressure
at which the gas switch should switch
off. Set this pressure by means of the
valve. Carefully turn the knob (see

switches off. The value shown on the
scale should then approximately cor-
respond with the value shown on the
pressure gauge. Tolerance on scale

GENERAL INSTRUCTION
Adjustemnt of max. gas pressure
switch
The burner is equipped with a max.
gas pressure switch only on request.
It should stop the burner if the gas
pressure exceeds the set value. The
burner can then only be re-started
manually (gas burner control or
overpressure switch).
Remove the protective cover. Connect
a pressure gauge for measuring the
rated gas pressure. Decide on pres-
sure at which the gas pressure switch
should switch off.Turn the adjustment
knob to this value. Tolerance on the

Adjustment of air pressure switch
The air presure switch should stop the
burner if the air volume is reduced.
The air proving device shall be adjusted

air supply at the highest or lowest
burner operating stage, the device
operates before the supervised pres-

at the controlled stage and the CO
content of the combustion products

Air pressure switch:

1-10 mbar LGW 10
2,5-50 mbar LGW 50
Flame monitoring
Gas pressure switch, air pressure
switch
Gas control Connection to terminal
in gas control
Min. ionisation
current required
LME 15 µ A
LFL 24 10 µ A