Enertech Bentone STG 146 Technical specifications

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178 040 26
Installation- and maintenance instruction
STG 146

172 205 80 97-01
DESCRIPTION
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

A
ø 89
20261192
139
290
244
TECHNICAL DATA
Type designation STG 146 Burner head 1 in accordance with RAL UZ 80
172 215 43 98-02
CAPACITY CHART ACCORDING TO
EN 676
Connection 2) Motor Ignition transformer
Natural gas 220/240V,2800r/m, Electronic
½" 50Hz, 70-90 W, 0,65A 230/11000V, Ampl.
1) Calorific value:
Natural gas 10 kWh/Nm3
2) Depending on gas quality and
available pressure
Type Capacity Nm3/h at min. Nm3/h at max. Rated inlet pressures
kW output of burner 1) output of burner 1) mbar
Natural gas Natural gas Natural gas Natural gas
STG 146 23,5-65 2,35 6,5 20
OUT RANGE
The above dimensions are max. measurements. Depending on the components
used, the measurements may vary.
DIMENSIONS
Length of Flange A
burner tube Measure A
Standard 108 81
Long design 140 113

A
ø 103
20261192
139
290
244
TECHNICAL DATA
Type designation STG 146 Burner head 2
172 215 44 98-01
CAPACITY CHART ACCORDING TO
EN 676
Connection 2) Motor Ignition transformer
Natural gas, LPG 220/240V,2800r/m, Electronic
½" 50Hz, 70-90 W, 0,65A 230/11000V, Ampl.
1) Calorific value:
Natural gas 10 kWh/Nm3
LPG 26 kWh/Nm3
2) Depending on gas quality and
available pressure
Type Capacity Nm3/h at min. Nm3/h at max. Rated inlet pressures
kW output of burner 1) output of burner 1) mbar
Natural gas LPG Natural gas LPG Natural gas LPG Natural gas LPG
STG 146 41-133 47-144 4,1 1,8 13,3 5,5 20 30
OUT RANGE
The above dimensions are max. measurements. Depending on the components
used, the measurements may vary.
DIMENSIONS
Length of Flange A
burner tube Measure A
Standard 145 121,5
Long design 245 221,5
LPG
Natural gas

TECHNICAL DATA
172 215 45 98-01
DIMENSIONS OF FLANGE
Flange
10
145,0
23,5
109,5

172 415 11 03-01
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
Incorporated in the Multibloc
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.
When Bio gas is used, Bentone shall always be contacted.

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 pat-
tern. Use fixing screws M8-M10.
Push the burner into the flange and fix
it by means of the screws in the flange.
Ensure that the burner is fitted absolu-
tely straight.
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
connectthegastothe multi-blocstraight
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.
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.
172 205 81 97-01

ELECTRIC EQUIPMENT
GAS BURNER CONTROL: LGB21/LMG21/LME11/LME21
WIRING DIAGRAM
COMPONENTLIST
A1 Gas burner control
A2 Twin thermostat
B1 Ionization electrode
F1 Fuse
H1 Alarm, 230 V
M1 Burner motor
S3 Main switch
S8 Air pressure switch
S9 Gas pressure switch
T1 Ignition transformer
X1 Plug-in contact, burner
X2 Plug-in contact, boiler
Y1 Gas solenoid valve
If there is no plug-in contact (X2) on
the boiler, connect to the contact
enclosed. In case the twin thermostat
is in series on incoming phase L1,
a loop between the terminals T1 and
T2 is necessary.
172 425 16 08-02Mains connection in accordance with local regulations.

172 435 82 08-01
ELECTRIC EQUIPMENT
Control diagnosis under fault conditions and lockout indication
Gas burner control: LGB ...
Connecting signal amplifier A1 = LGB
GP
R/W
LN
br bl rt sw
sw rtQ1 = AGQ 1...
QRA
11112 2
The position of the cam can be read through the sight-glass. Under fault condition the
programme is stopped and thus also the lock-out indicator. The symbol visible on the cam
indicates both the position in the programme run and the type of fault. The symbols are
explained below:
Lock-out and Control Programme Indication
Resetting the burner controls
Control Programme in Case of Faults
Basically, the fuel supply is stopped immediately in the case of any fault. If the fault
condition occurs at a time between start and pre-ignition, which is not indicated by
symbols, the cause is usually a switch-off by the air pressure switch LP or a too early,
i.e. faulty, flame signal.
•After supply voltage failure: Start-up repetition with unabridged programme.
•If premature flame signal at start of pre-purge time: Immediate lock-out.
•If contacts of air pressure switch LP have welded during tw: No start.
•If no air pressure signal: Lock-out when t10 has elapsed.
•If air pressure failure after elapse of t10: Immediate lock-out.
•If burner does not ignite: Lock-out when safety time t2 has elapsed.
•If flame is lost during operation: Immediate lock-out.
• For ignition spark proving with QRE: If no ignition spark signal, the valves remain
closed and there is lock-out when t2 has elapsed.
The controls can be reset immediately after any fault condition. The programme reverts
to its start position and programmes the controls for restarting the burners.
No start because the control loop is interrupted
Waiting for the pre-purge to start
Air damper open (LGB22)
Fault condition due to absence of air pressure signal (LGB21),
air damper not open (LGB22)
Pre-purge period
Fuel release (LGB22)
Fault condition because no flame signal available after elapse of the 1st
safety time
Release of the 2nd fuel valve (LGB21)
Release of the load controller LR (LGB22)
Partial or full load operation (or return to the operating position)

172 425 57 08-01
After lockout, the red fault LED is steady on. For reading the cause of fault, refer to the
blink code given in the following table:
Diagnosis of cause of fault
AL
FS
LED on (waiting time 10 s)
Fault
Press lockout reset button
for > 3 s Blink code Off Blink code
Approx.
3 s
ELECTRIC EQUIPMENT
Control diagnosis under fault conditions and lockout indication
Gas burner control: LMG ...
Error code table
Blink code Possible cause
2 x • No establishment of flame at the end of «TSA»
•• - Faulty or soiled detector electrode
- Faulty or soiled fuel valves
- Poor adjustment of burner
3 x • Air pressure monitor does not close
••• - «LP» faulty
- «LP» incorrectly adjusted
- Fan motor does not run
4 x • Air pressure monitor does not open or extraneous light on
burner startup
•••• - «LP» faulty
- «LP» incorrectly adjusted
5 x • Extraneous light during pre-purging
••••• - Or internal device fault
7 x • Loss of flame during operation
••••••• - Poor adjustment of burner
- Faulty or soiled fuel valves
- Short-circuit between detector electrode and ground
8...17 x • Free
••••••••
..................
••••••••••
•••••••
18 x • Air pressure monitor opens during pre-purging or operation
•••••••••• - «LP» incorrectly adjusted
•••••••• - Four times loss of flame during operation (LMG25)
19 x • Faulty output contact
•••••••••• - Wiring error
••••••••• - External power supply on output terminal
20 x • Internal device fault
••••••••••
••••••••••
During the time the cause of
the fault is diagnosed, the
control outputs are deacti-
vated.
- The burner remains shut
down
- Exception: fault status sig-
nal «AL» at terminal 10
The burner is switched on
only after a reset is made.
- Press lockout reset button
for 0.5...3 seconds
Red LED on
Connecting signal amplifier A1 = LMG
GP
R/W
LN
br bl rt sw
sw rtQ1 = AGQ 2...
QRA
11112 2

172 445 02 08-01
ELECTRIC EQUIPMENT
Control diagnosis under fault conditions and lockout indication
Gas burner control: LME....
Diagnostics alarm trigger
Colour codes
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
Operation, poor flame signal Flashing green
Prohibited flame signal during start up Green-Red
Undervoltage Yellow-Red
Disruption, alarm Red
Flashing code for fault codes Flashing red
Interface diagnostics Red flickering
Continuous
Off
Red
Yellow
Green
1(2)
Limit on start attempts
LME 11 … limits the number of start attempts if the flame does not ignite on start-up or goes
out during operation. LME 11 … permits a maximum of three start attempts if the start cycle
is uninterrupted.
Light period (waiting time 10 s)
The red alarm signal lamp lights continuously after the alarm is disconnected.
Diagnostics for alarm triggers can be read as specified by the following sequence:
AL
FS
Flash code Pause Flash code
Approx. 3 s
lights red Press the reset
button > 3 s

172 445 02 08-01
ELECTRIC EQUIPMENT
Control diagnosis under fault conditions and lockout indication
Gas burner control: LME....
Alarm control table
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.
To switch to interface mode, hold the reset button depressed for more than 3 s. To return
to normal mode, hold the reset button depressed for more than 3 s. If the firing unit is in
the alarm mode, it is reset by pressing the reset button 0.5...3 s.
Interface diagnostics
Connecting signal amplifier
2(2)
Red flashing code on Possible causes
signal lamp (LED)
Flashing 2 x No flame at End of «TSA»
•• - Defective or obscured flame monitor
- 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 Prohibited flame signal during start up
••••
Flashing 5 x Time out «LP»
••••• - «LP» is welded in the closed position
Flashing 6 x Free
••••••
Flashing 7 x Too many loss of flame during operation
••••••• - Poor burner installation
- Defective or obscured fuel valves
- Defective or obscured flame monitor
Flashing 8 x Free
••••••••
Flashing 9 x Free
•••••••••
Flashing 10 x Connection fault or internal fault,
•••••••••• outgoing contacts or other fault
Flashing 14 x CPI contact not closed
••••••••••
••••
A1 = LME
GP
R/W
LN
br bl rt sw
sw rtQ1 = AGQ 3...
QRA
11112 2

MEASURES AND CHECKS BEFORE START-UP
172 205 82 07-01
LEAKAGE CONTROL
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
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
for the gas quality to be used (see fig.).
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.
LEAKAGECONTROL
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 swit-
ched on and the thermostats have
been adjusted the pre-purging period
begins (30-50 sec.). At the end of this
period the pre-ignition period starts
(0,5-3 sec. dependent on the design of
the gas control). The gas valve is
energized and opens. 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. INNER ASSEMBLY
Town gas
INNER ASSEMBLY
Natural, LPG

MEASURES AND CHECKS BEFORE START-UP
INNER ASSEMBLY
Town gas not CE approved
INNER ASSEMBLY
Natural gas, LPG
INNER ASSEMBLY
Biogas (UV-detector)
Natural gas
2,5
8
2,5
8
172 205 77 07-01

172 205 16 98-01
DETERMINATION OF GAS VOLUME FOR THE INSTALLATION
V = Gas volume Nm3/h
Q = Boiler output 120 kW
Hu= Calorific value of the gas A. 37 144 kJ/Nm3, B. 10.3 kWh/Nm3
η= Expected efficiency 90%
Ex. A
Ex. B
If the barometer height, pressure and temperature of the gas deviate very much from the normal values this must be taken
into account as follows:
f=
t = Temperature of the gas at the gas meter (15°C)
B = Barometer height (945 mbar)
Pu= Pressure of the gas at the gas meter (15,0 mbar)
f=
f≈1.11
The gas volume read on the gas meter actually reads 1,11 .12,9 = 14,4 m3/h.
Net calorific value
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
Specifications on natural gas, town
gas and bio gas vary. For more exact
information please contact the gas
distributor.
EXAMPLE HOW TO CALCULATE THE GAS VOLUME (NATURAL GAS)
273+15
273 .1013,25
945+15
V=120
10,3 · 0,90 ≈12,9 Nm3/h
B+Pu
273+t
273 .1013,25
120 .3 600
37 144 .0,90
V=Q .3 600
Hu · η
=≈12,9 Nm3/h

10 3
172 505 21 04-01
6. Main flow restrictor
7. Gas pressure switch min.
8. Electrical connection, gas pres-
sure switch
9. Alt. test nipple for supply pressu-
re (after the filter)
1. Test nipple for supply pressure
2. Coils + electrical connection
3. Gas filter
4. Test nipple for governor pressure
5. Test nipple for burner pressure
10. Screws for cover
11. Adjustment of governor
12. Screws for gas pressure switch
and coil
2
5
MULTIBLOC, BM771.... / GB-LD055 D01...
6
12
9
12
7
8
4
12
1
11

ADJUSTMENT OF MULTI-BLOC, BM771.... / GB-LD055 D01...
172 505 22 04-01
- Connect a pressure gauge to the
test nipples
(1) Supply pressure
(4) Governor pressure
- See to it that gas free from air is
available at the ball valve
- Start the burner
ADJUSTMENT OF GAS FLOW
- Adjustment of the gas flow can be
made on the adjustment screw (6)
by means of an Allen key size 2 mm
- Increased gas flow,
turn clockwise +
- Decreased gas flow,
turn anti-clockwise -
NOTE! When changing the gas flow,
a new adjustment of the air must be
made. Use a flue gas instrument for
this adjustment.
ADJUSTMENT OF GOVERNOR
A higher outlet pressure from the
governor can be necessary if for
instance the flow adjustment is max.
open and the setting from factory 10
mm is not enough.
- Adjustment of the governor pressu-
re can be made on the adjustment
screw (11) by means of an Allen key
size 2 mm
- Adjustment clockwise gives a higher
pressure
- Adjustment anti-clockwise gives a
lower pressure
CHECK OF FILTER
- Screw off the six fixing screws (10)
- Remove the protecting cover and
the gasket (be careful so that the
gasket does not get damaged)
- Remove the filter, clean or exchange
it
- After the cleaning, fit the gasket and
the protecting cover with the six
screws
CHANGE OF COIL
- Loosen the screw (12)
- Remove the coils (2)
- Mount a new coil
- Attach the coil by means of the screw
(12)
CHANGE OF GAS PRESSURE
SWITCH (GW....A5)
- Loosen the two screws (12)
- Remove the gas pressure switch
carefully
- Mount the new gas pressure switch
- Attach the gas pressure switch by
means of the two screws (12)
IMPORTANT
When changing gas pressure swit-
ches, inspecting filters and so on, see
to it that O-rings and gaskets are in the
correct position and that a leakage test
is made after each operation.

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 manu-
facturers instructions.These must
include the checking of flue gas tempe-
ratures,averagewatertemperatureand
CO2or O2concentration
GENERAL INSTRUCTIONS
The installation of the gas burner must
be carried out in accordance with cur-
rent regulations and standards. The
installers of gas burners should therfo-
re be acquainted with all regulations
and ensure that the installation comp-
lies with the requirements. The instal-
lation,mountingandadjustmentshould
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 instruc-
ted 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 appro-
ved 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, combu-
stion air and combustion head.
172 305 52 05-01
GENERAL INSTRUCTIONS
Open the ball valve and switch on the
main switch. If the burner starts the
actual adjustment can be made.
AIR ADJUSTMENT
On all burners the air adjustment can
be made with or without the cover
fitted. Final fine adjustment must be
made with the cover on.
ADJUSTMENT OF BURNER HEAD
The burners are equipped with an ad-
justment device changing the position
of the brake plate in the burner head.
This is used to adjust the correct pres-
sure drop over the combustion device
and thereby 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 capaci-
ty the smaller the opening between
brake plate and combustion device.
ADJUSTMENT OF BRAKE PLATE
- Turn by means of an allen key the
screw in the desired direction.
STG120/1, STG120/2, STG146/1
- To reduce the opening: turn the
screw to the left.
- To increase the opening: turn the
screw to the right.
STG146/2
- To reduce the opening: turn the
screw to the right.
- To increase the opening: turn the
screw to the left.
Gas quality CO2%0
2% max CO2%
lambda 1,2
Natural gas 10,0 3,5 11,9
LPG 11,5 3,5 13,9
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.
CONTROL OF BURNER HEAD
To check the burner head, brake plate
and electrodes proceed as follows:
Remove the cover. Loosen the union
nut between inner assembly and multi-
bloc. Loosen the burner from the flange
and withdraw the burner from the boi-
ler. If it is necessary to remove the
burner tube, loosen the two allen
screws, turn and withdraw the burner
tube.
COMMISSIONING OF INSTALLA-
TION
Control of the combustion. The com-
bustion 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.

172 305 50 97-01
GENERAL INSTRUCTIONS
CONTROL OF BURNER HEAD
AIR ADJUSTMENT
ADJUSTMENT OF INNER ASSEM-
BLY