Bentone BG 400-2 Biogas Technical specifications

Providing sustainable energy solutions worldwide
Installation- and maintenance instruction
BG 400-2 Biogas
LME22.232C2E
DMV-DLE 512/11
MVD 215/5
VPS 504
FRS 515
Translation of the original instructions.
178 102 74-3 P93783 2022-12-14

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  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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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
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ecodesign.
-de
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in anderen Sprachen
2. www.bentone.com\
download oder scannen Sie
den QR-Code.
3. Geben Sie die
Artikelnummer des Brenners
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(siehe Bild) und wählen Sie
die Sprache aus.
Detaillierte Informationen
zum Ecodesign können unter
www.bentone.com/ecodesign
heruntergeladen werden.
2

3Bentone
Table of contents
1. General Information............................................................4
1.1 Delivery inspection........................................................................ 4
1.2 Safety ............................................................................................... 4
1.3 What to do if you smell gas......................................................... 5
2. Technical data.......................................................................6
2.1 Dimensions BG 400-2 .................................................................. 6
2.2 Capacity range............................................................................... 7
2.3 Gas categories, approved gases................................................ 7
2.4 Technicalspecication ................................................................. 8
2.5 Workingeld.................................................................................. 8
2.6 Components................................................................................... 9
2.7 Skeleton diagram, biogas 2-stage burner............................. 10
2.8 Adjusting the gas train............................................................... 10
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
4. Electric equipment.............................................................12
4.1 Safety system .............................................................................. 12
4.2 Wiring diagram............................................................................ 12
4.3 Function LME... ............................................................................ 13
4.4 Control program at faults; fault mode indicator LME .... .... 14
5. Mounting ............................................................................16
5.1 Gas nozzle..................................................................................... 17
5.3 Tightness control ........................................................................ 18
5.2 De-aerating................................................................................... 18
5.4 Calculationofgasow.............................................................. 19
6. Settings ...............................................................................20
6.1 Brake plate adjustment ............................................................. 20
6.2 Control of burner head.............................................................. 20
6.3 Startup........................................................................................... 20
6.4 Control of combustion .............................................................. 20
6.5 Settingtheairpressureswitch ................................................ 21
6.6 Settingthegaspressureswitchmin....................................... 22
6.7 Settings Damper motor, 2-stage ............................................. 23
7. Leakage control VPS 504 ..................................................24
7.1 Technical data .............................................................................. 24
7.2 Program sequence ..................................................................... 24
7.3 Electrical connection ................................................................. 25
8. Gas pressure regulator .....................................................26
9. Double Solenoid valve ......................................................28
10. Gas solenoid valve MVD 210/5 / MVD 215/5...................30
11. Service .................................................................................32
11.1 Burner Service Schedule, Gas .................................................. 32
11.2 Component replacement intervals.......................................... 32
11.3 Combustion device ..................................................................... 33
11.4 Air damper ................................................................................... 34
11.5 Replacement, Damper motor air............................................. 35
11.6 Fan ................................................................................................. 36
11.7 Replacement of electrical components.................................. 37
11.8 Vibrations...................................................................................... 38
11.9 Controlofamemonitoringandionizationcurrent ........... 39
12. Handing over of the installation ......................................41
13. Troubleshooting.................................................................42
14. Service- and inspection protocol .....................................44

4Bentone
172 515 01-2 2021-10-05
1. General Information
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 mains electricity regulations and in a
professional manner.
• Make sure that the burner is suitable for the application (see Technical
Data).
• All components must be installed without being bent, twisted or
subjected to mechanical or thermal forces that affect components.

5Bentone
• Care must be taken by the installer to ensure that no electrical cables
or fuel lines are pinched 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 device 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
2. Technical data
The burner is intended for:
• Operation in installations according to EN 303 and EN 676.
Fuels:
• Natural gas H, E, L, LL.
• Dry biogas max 0.1 Vol% H2S and min 50% CH4.
2.1 Dimensions BG 400-2
172 535 43 2022-12-06
Length of
fl ame tube
Flame tube
measure A
Flame tube
measure B
Flame tube
measure C
172 155 ø140 ø110
272 255 ø140 ø110
* The above dimensions are max. measurements. Depending on the components used, the measurements may vary.
** Min. recommended distance to  oor.
D E F G H I J
100 410 250 *410 192 *506 **200
I
øC
A D
H
F
E
øB
G
**J
160303-622

7Bentone
K L M
12 ø175-240 ø145 (***115)
K
L
M
***Dimensions when installing blast tubes from the inside of the boiler.
2.3 Gas categories, approved gases
Components are approved for dry biogas with a maximum content of 0.1% H2S.
BG 400-2
G20 61 - 325 6.5 34.4 360
G25 61 - 310 7.5 38.1 360
61 - 250 10.2 41.7 360
160303-627
Capacity
kW
Gas quantity
at min. power
Nm3/h
Gas quantity
at max. power
Nm3/h
Max.
connection
pressure mbar
Min
connection
pressure mbar
See data plate.
Biogas
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
160302-223-3
2.1.1 Measurements for connection to the boiler
2.2 Capacity range

8Bentone
!Do not exceed working
eld.
2.5 Working eld
2.4 Technical specication
Measurements according to EN 15036-1:2006
Alt.1 The noise 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.
BG 400-2
Main supply 230V, 1~, 2.2A, 50Hz, IP20
Max fuse rating 6.3A
NOX-class 2 G20, G25 / 3 G30, G31
Noise level 89dBA
-
1
0
1
2
3
4
5
6
7
50 100 150 200 250
mbar
kW
61-250 kW
160303-619

9Bentone
2.6 Components
1. Switch 0-I
2. Switch I-II
3. Cover, inspection glass
4. Reset button
5. Air pressure switch
6. Damper motor
7. Inner assembly adjustment
(not for town gas)
8. Flame cone
9. Gas valve (MultiBloc)
10. Connecting pipe
11. Air damper
12. Air intake
13. Gas pressure switch
14. Ball valve
15. Electrical panel
16. Fan wheel
17. Electrical connection
18. Motor
19. Ignition electrode
20. Transformer
21. Ionization electrode
22. Inner assembly
23. Nozzle
24. Brake plate
3
5
6
10
11
13
14
15
18
19
23
21
20
12
22
24
7
9
8
7
160303-625
160303-626
1 2
4
17
16

10 Bentone
172 515 72 2018-02-19
2.7 Skeleton diagram, biogas 2-stage burner
VPS: Standard on burners with an output ≥ 1200 kW. Optional on burners with an output < 1200 kW.
1. Safety valve on-off
2. Gas pressure switch
3. Governor FRS shall be be
tted with separate lter
4. Twin solenoid valve
5. Governor pressure
6. Valve proving system (VPS)
Pe Pressure before valve
Pa Pressure between valves
Adjusting points:
a. Main ow restrictor stage 2
(max load)
b. Gas pressure adjustment
c. Main ow restrictor stage
1(min load)
d. Hydraulic brake stage 1 to 2
2.8 Adjusting the gas train
The burner is test-run with propane prior to delivery.
During operation, the safety valve (1) must be fully open.
When adjusting Stage 1 on the burner, valve 2 must
be opened using the adjustment screw (c). When this is
screwed in, the ow of gas to the burner increases by
lifting the valve. During initial setting, the valve must have
been lifted by the adjustment screw after 1-2 turns. This
valve is always open and this opening is what determines
the minimum load.
When adjusting Stage 2 is done using the adjustment
screw (a) which controls the opening of valve 1.
At start-up, the safety valve opens and valve 1 gas ows
through valve 2, which was opened using adjustment
screw C. The burner now receives gas for the minimum
load. Increase the load to Stage 2 and set the output on
the burner.
Output is adjusted at Stage 2 by opening valve 1 using
adjustment screw A and adjusting the gas pressure on
pressure regulator screw B. The air damper must also
be adjusted to ensure that the correct volume of air is
obtained. Once the correct output and pressure are set in
Stage 2, move on to Stage 1. Stage 1 is now adjusted using
adjustment screw C to ensure that the correct volume
of gas is obtained. Adjust the air damper for correct
combustion.
a
b
4
1 c2 3
5
d
6
a
b
4
1 c 3Pa Pe
d

11Bentone
172 535 09-2
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 settings 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 system.
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
4. Electric equipment
4.1 Safety system
The safety system (safety switch for hatches, doors, water level, pressure,
temperature and other safety devices) must be installed in the safety circuit in
accordance with current regulations for the system.
The cables of the safety system must be separated so that the outgoing signal
is not placed in the same cable as the incoming signal.
4.2 Wiring diagram
172 615 31-2 2022-11-28
E106020
Bn Brown
Bu Blue
Gn Green
Ye Yellow
Gn/Ye Green/Yellow
Bk Black
Gy Grey
Rd Red
Wh White
Og Orange
Vt Violet

13Bentone
4.2.1 List of components
A1 Gas burner control
A3 Valve, leak tester VPS 504
F1 Operating fuse
H1 Lamp, low capacity
H2 Lamp, high capacity
H3 Alarm signal 230V
M1 Motor
M2 Damper Motor SQN75
P1 Time meter, total operating
time
P2 Time meter, high capacity,
total operating time
Q1 Signal amplier AGQ
R1 UV-Detector
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
Y3 Safety solenoid valve
4.3 Function LME...
1. Operating switch ON-Thermostat ON-Gas pressure switch ON
A check that the air pressure switch does not indicate fan pressure is
carried out.
2. Burner motor starts
A check that the air pressure switch indicates sucient fan pressure is
carried out.
3. The ignition spark is created
4. The gas solenoid valve is open
The gas is ignited. The ionisation electrode now indicates a ame.
5. The safety time expires
The ignition spark ceases. The safety period ceases. If the spark is missing
or it disappears after this time limit, the gas burner control is blocked.
6. Operating position
7. Stop
The operation of the burner can now be stopped with the control switch or
thermostat.
If the gas burner control is blocked
Red light in the gas burner control is lit. The burner is restarted by pushing
the reset button.
4.3.1 Technical data
!Mains connection and
fuse in accordance with
local regulations.
LME22.232C2E
3 s
20 s
2.5 s
< 3 s
< 1 s
< 1 s
5 µA
20 µA
160303-325
Preiginition time
Prepurge time
Postignition time
Safety lockout time
Reset time after lockout
Reaction time on  ame failure
Min. ionisation current at  ame
Max. ionisation current

14 Bentone
Light period
(waiting period ≥10 s) Blinking code Pause Blinking codePress the
reset button > 3 s
4.4 Control program at faults; fault mode
indicator LME ....
4.4.1 Colour codes
4.4.2 Diagnosing alarm causes
After alarm disconnection, the red alarm signal light is lit continuously.
The diagnosing of the alarm cause can be read according to the following
sequence:
4.4.3 Limiting of starting repetitions
LME 11... has a function with start repetition if the ame is not created at start
or disappears during operation.. LME 11... allows max. three repetitions during
continuous starting cycle.
Table colour codes for multi-coloured signal light (LED)
Status Colour codes Colours
Waiting period «tw», other waiting periods ○………………… O
Ignition phase, ignition controlled ●○●○●○●○●○● Blinking yellow
Normal operation □………………… Green
Operation, poor ame signal □○□○□○□○□○ Blinking green
Illegal ame signal during start-up □▲□▲□▲□▲□▲ Green-Red
Undervoltage ●▲●▲●▲●▲●▲ Yellow-Red
Fault, alarm ▲………………… Red
Blinking code for fault codes ▲○ ▲○ ▲○ ▲○ Blinking red
Interface diagnostics ▲▲▲▲▲▲▲▲ Red icking
…… Continuous
○Off
▲Red
●Yellow
□Green

15Bentone
4.4.4 Alarm code table
Red blinking code on
signal lamp (LED)
Possible causes
Blinking 2 x
••
No ame creation at End of “TSA”
–defective or fouled ame monitoring.
–defective or fouled fuel valves.
–poor burner setting.
–defective ring device.
Blinking 3 x
•••
“LP” defective
–No air pressure switch signal after “t10”.
–“LP” is welded in open position.
Blinking 4 x
••••
Illegal ame signal during start-up.
Blinking 5 x
•••••
Time out “LP”
–“LP” is welded in open position.
Blinking 6 x
••••••
Free
Blinking 7 x
•••••••
Too many ame disappearances during operation.
–poor burner setting.
–defective or fouled fuel valves.
–defective or fouled ame monitoring.
Blinking 8 x
••••••••
Free
Blinking 9 x
•••••••••
Free
Blinking 10 x
••••••••••
Connection fault or internal fault, outgoing contacts or
other faults.
Blinking 14 x
••••••••••••••
CPI contact not closed.
During the diagnosing of the alarm cause, the control outputs are voltage-
free.
• The burner is disconnected.
• Exception, alarm signal «AL» at board 10.
• Reconnection of the burner happens after resetting only.
• Press the reset button 0.5...3 s.
4.4.5 Interface diagnostics
To change to interface mode, press and hold the reset button longer than 3 s.
To go back to the normal position, press and hold the reset button longer than
3 s. If the gas burner control is in the alarm position, it is reset by pressing the
reset button 0.5...3 s.

16 Bentone
172 515 06-2 2022-11-28
!Check for leaks in the gas line.
5. Mounting
The burner is mounted on the boiler according to the hole pattern on the
xing ange.
1. Remove the gas valve from the burner.
2. Remove fan housing by loosening nut (A), swing out fan housing.
Disconnect ionisation and ignition cables from the electrodes.
Remove nut (B) on hinged ange and lift fan housing off.
3. Install the xing ange and the supplied gasket on the boiler. If
new mounting holes need to be drilled, use the xing ange as a
template and fasten with M8-M12 screws.
4. Check that the electrodes are correctly set, see chapter Gas
nozzle.
5. Mount the fan housing on the xing ange and fasten with nut
(B).
6. Connect the ionisation and ignition cables.
7. Fit the gas valve.
8. Connect the gas with the ball valve provided. Ensure that the pre-
screwing, ball valve and tubings are done in such a way that the
burner and boiler hatch can be easily used for servicing.
9. Connect the supply cable, operating and safety circuits.
B
A

17Bentone
5.1 Gas nozzle
Check that the ignition and ionization electrodes are correctly set before
mounting on the boiler.
Natural gasPropan
Biogas (UV detector)
2.5
8.0
172 515 08-2 2022-11-28

18 Bentone
5.2 De-aerating
De-aerating the gas line by closing the tap to the gas connection and
unscrewing the screw on the measuring nipple for the connection pressure.
Connect a plastic hose, open the tap and drain the gas in a safe place. When
the de-aerating is completed, be sure to ret the screw on the measuring
nipple.
5.3 Tightness control
When checking for leakage, the solenoid valve must be closed. A pressure
gauge is connected to the measuring nipple ”Pa”, see picture. The test
pressure in the system must not be higher than max. connection pressure,
see data plate. If leaks are found during measurement, locate the source
using soapy water or leak detection spray. After sealing: check the tightness
of the gas xture again.
!Check the gas tightness.
Pa

19Bentone
5.4 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] 140 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]0.46 m3
T Measuring time for consumed gas quantity [s] 91 s
VN=
Q
VN =
140 kW
=16.5 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=
16.5 m3/h =18.2 m3/h
f0.90
Calculate gas volume using the following formula:
V=
3600 · VGV= 3600 · 0.46 m3
=18.2 m3/h
T91 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.
172 515 13-2
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
Butane G30 32.25 116.09
Propane G31 24.44 88.00

20 Bentone
172 515 10-2 2022-11-25
6. Settings
6.1 Brake plate adjustment
The position of the brake plate must be adjusted to achieve the most favorable
pressure drop across the brake plate.
oosen 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 ow. It is
therefore always necessary to make a ne adjustment of the air by means of
the adjustment device of the burner.
6.2 Control of burner head
To check the burner head, brake plate and electrodes, see chapter Service
Combustion device.
6.3 Startup
After the burner has been mounted on the boiler and the electrical connection,
de-aeration and tightness control have been performed, the burner is ready to
start-up.
Read the sections dealing with settings of gas valve, damper motor and
combustion device before start-up.
Open the ball valve and turn on the main switch, start the burner and begin
setting up the system.
6.4 Control of combustion
Check combustion using ue gas analysis instruments. Set the burner to about
20% excess air and check that good combustion is obtained. Check the actual
gas ow on the gas meter to ensure that the correct input power is achieved.
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.
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.
7. Re t protective cover.