Bentone STG 146/1 Technical specifications

Providing sustainable energy solutions worldwide
178 003 26-4 2018-03-27
Installation- and maintenance instruction
STG 146/1

2Bentone

3Bentone
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 STG 146 ________________________________________ 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 Installation example _________________________________________ 14
4.8 Inspection of gas nozzle before commissioning __________________ 15
4.9 Gas nozzle _________________________________________________ 16
4.10 Multiblock MB-ZRDLE 405-412 _______________________________ 17
5. Setting the burner ______________________________________________ 20
5.1 Setting the air pressure switch ________________________________ 23
5.2 Setting the min. gas pressure switch ___________________________ 24
5.3 Recommended excess air when using default setting _____________ 25
5.4 Determining the gas quantity for the system _____________________ 25
5.5 Calculating the quantity of gas supplied ________________________ 27
5.6 Flame monitoring and ionisation current check___________________ 28
5.7 UV-Detector________________________________________________ 29
6. Handing over of the installation__________________________________ 30
7. Fault location, functional troubles________________________________ 30
8. Electric equipment _____________________________________________ 31
8.1 Safety system ______________________________________________ 31
8.2 Wiring diagram LME _________________________________________ 32
8.3 List of components__________________________________________ 33
8.4 Control program at faults; fault mode indicator LME .... ___________ 34
9. Troubleshooting________________________________________________ 36
10. General instructions for gasburners____________________________ 39
11. EU Declaration of conformity _________________________________ 41

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 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.

7Bentone
172 515 42 2018-03-05
C D E F G H **I
STG 146 244 192 61 *202 *290 139 200
2. Technical data
2.1 Burners are intended for use at:
• Hot water boilers in intermittent operation
2.2 Dimensions
* The above dimensions are max. measurements. Depending on the
components used, the measurements may vary.
** Min. recommended distance to floor.
Gas connection ¾-2"
A
ø B
FE
D
HG
C
Type Length of burner
tube
Flange
measure A
Burner tube
measure B
STG 146/1 Standard 1 108 92,5 ø89
108 65 ø89
J K L M
STG 146 M10 Ø 90 Ø 125-150 5
M10 Ø 90 Ø 125-150 17
2.2.1 Heat generator connection dimensions
K
L
M
J
KM
L
J

8Bentone
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
2.2.3 Gas categories, approved gases
Only dry gas is permitted for use
STG 146/1
G20 24-65 2,4 6,5 200
360
360
25
20
20
MBC 65
MBC 120
MB 407
G25 24-65 3,0 8,2 200
360
360
35
25
20
MBC 65
MBC 120
MB 407
kWh/Nm3MJ/Nm3kcal/Nm3
G20 9.5 34.02 8126
G25 8.2 29.25 6986
G31 24.6 88.00 21019
G30 32.5 116.09 27728
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
MB-Bloc
Lower heat value Hu at normal state 15°C and 1013.25 mbar EN676
Grade of gas
Natural gas
Natural gas
Propane
Butane
Gas quantity and capacity vary according to grade of gas and connection

9Bentone
Burner correspond to IP20
STG 146/1
G20,G25 24-65 kW
2.2.4 Electric Specification EN 60335-2-102
!Do not exceed working
field
2.2.5 Working field
Type STG 146
Motor 125W, 0,95A, 230V, 50Hz,
2750rpm
The recommended main fuse
motor 6,3 A
Control power 230V1F~2,5A
Sound 79 dBA ± 0,5 dBA
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.

10 Bentone
2.3 Description STG 146
Components
1. Reset button
2. Gas burner control
3. Transformer
4. Fixing flange
5. Connection MultiBloc
6. Ionisation electrode
7. Inner assembly
8. Brake plate
9. Burner tube
10. Ignition electrode
11. Air damper
12. Front part fan housing
13. Rear part fan housing
14. Air pressure switch
15. Shielding arrangement
fan housing
16. Fan wheel
17. Air adjustment
18. Inner assembly adjustment
19. Motor
20. Electric connection
21. MultiBloc

11Bentone
172 515 03 2018-01-02
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.

12 Bentone
172 515 03 2018-01-02
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.

13Bentone
172 515 19 2018-01-08
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
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.

14 Bentone
4.6 Mounting on the boiler
Fit the enclosed flange and gasket to the boiler.If new fixing holes must be
drilled, use the fixing flange as a pattern. Use fixing screws M8-M10.
The gas armature is from the factory mounted in a horizontal position. The
connection of the incoming gas line is made from the right side. Should it
for some reason be necessary to make the gas connection in any other
direction the armature can be turned 180° to the left and upwards. It is
also possible to connect the gas to the multi-bloc straight backwards. The
armature can also be extended so that it comes outside the boiler if there is
not enough room. Ensure that the distance between the inner asembly and
the gas armature is not too long. If the distance is too long there will not be
time for the burner to light.
4.7 Installation example
Connect the gas to the burner by means of the ball valve. To facilitate service
a union nut is used between the gas supply system and the ball valve.
Ensure that the union nut, ball valve and tubing make it easy to remove the
burner for inspection and service.
!Check the gas tightness.
172 515 20 2018-01-08

15Bentone
172 515 21 2018-01-08
4.8 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.
Inner assembly
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.
!If the burner is directly
connected, ensure
that all components on
the burner are without
power.

16 Bentone
4.9 Gas nozzle
Inner assembly
Natural, LPG
Natural gasLPG 2,5
8

17Bentone
!All gasline components shall be assembled and
mounted without bending, torque and outher
mechanical or thermal stress.
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
5.4 Multiblock MB-ZRDLE 405-412
1
2
34
5
6
7
9
11
12
10
8
13
Max. inlet pressure: 360 mbar.
Adjustable governor pressure:
405 - 412 S50 = 4 - 50 mbar
415 - 420 S20 = 4 - 20 mbar
415 - 420 S50 = 20 - 50 mbar
Solenoid valve: Slow opening valves
with adjustable start load, stage 1
and stage 2.
Turn to the left = the start gas flow is
increased.
172 515 11 2018-01-03

18 Bentone
Flow adjustment 2-stage design
For stage 1, loosen the lock screw a. Turn the hydraulic
device e:
to the right = the gas flow is reduced
to the left = the gas flow is increased
For stage 2, turn the hydraulic device b:
to the right = the gas flow is reduced
to the left = the gas flow is increased
Do not forget to tighten the lock screw again.
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
Adjustment of start gas flow
Remove the protective cover c.
Turn the adjustment knob d (use the protective cover as
a tool) to the desired start gas flow.
Turn to the right = the start gas flow is reduced
Turn to the left = the start gas flow is increased
Adjustment of governor Adjustment of start gas flow
Multi-bloc MB-ZRDLE 405-420
Flow adjustment
172 515 11 2018-01-03

19Bentone
5.4.1 Pressure taps
1,2,3,4,5 1/8 screwed sealing plug
5.4.2 Electrical connection
S 20/S 50
172 515 11 2018-01-03

20 Bentone
172 515 22 2018-01-08
5. Setting the burner
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 in accordance with boiler
manufacturers instructions. These must include the checking of flue gas
temperatures, average water temperature and CO2 or O2 concentration
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
therfore 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 operating instructions accompa-nying 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.
Service
Service should only be carried out by qualified personell. 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).
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.
Hower, 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.