background image

172 305 25   00-01

FLAME MONITORING AND MEASU-
REMENT OF IONISATION CURRENT

The burner is monitored according to
the ionisation principle. Check the io-
nisation 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 of
the flame electrode in the burner head.
Sometimes also a faulty gas/air mixtu-
re may cause too weak a ionisation
current.

The ionisation current is measured by
means of a microampere meter  (

μ

A)

connected in series with the flame
electrode and the gas burner control.

Connect the 

μ

A-meter, see figure.

Min. required ionisation current ac-
cording to table. In practice this cur-
rent must be considerably higher, pre-
ferably more than 10 

μ

A. All the gas

burners are equipped with a ionisation
cable that can be slit which facilitates
the connection of the 

μ

A-device.

GAS PRESSURE SWITCHES:

Adjustment range:

2,5-50 mbar

GW 50

5-150 mbar

GW 150

ADJUSTMENT OF MIN. GAS PRES-
SURE 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
figure) until the gas pressure switch
switches off. The value shown on the
scale should then approximately cor-
respond with the value shown on the
pressure gauge. Tolerance on scale
appr.  ± 15 %. Open the ball valve.

GENERAL INSTRUCTION

ADJUSTEMNT OF MAX. GAS PRES-
SURE SWITCH

The burner is equipped with a max. gas
pressure switch only on request. It
should stop the burner if the gas pres-
sure 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
scale ±15%.

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 adjus-
ted in such a way that if there is
insufficient air supply at the highest or
lowest burner operating stage, the
device operates before the supervised
pressure is less than 80% of the pres-
sure at the controlled stage and the CO
content of the combustion products
exceeds 1% by volume.

AIR PRESSURE SWITCH:

Adjustment range ca:

1-10 mbar

LGW 10

2,5-50 mbar

LGW 50

FLAME MONITORING

GAS PRESSURE SWITCH, AIR
PRESSURE SWITCH

Gas control

Connection to terminal

Min. ionisation

in gas control

current required

LMG

1

μ

 A

LGB

1

10 

μ

 A

LFL

24

10 

μ

 A

MMI 810

2

μ

 A

TMG 740-3

1

μ

 A

Summary of Contents for Bentone BG 450

Page 1: ...Providing sustainable energy solutions worldwide 178 011 75 2 2016 11 28 Installation and maintenance instruction BG 450...

Page 2: ......

Page 3: ...ide stop is installed before servicing Take great care when servicing Trap and pinch risks can be present The boiler s sound level can exceed 85 dBA during operation Use ear protectors when present in...

Page 4: ...10 Motor 18 Switch l ll Formodulatingburner Change overswitchmanually automatically 19 Indicating lamp Stage 1 20 Switch 0 1 21 Contactor 22 Controlbox 23 Ignitiontransformer 24 MultiBloc 11 Connecti...

Page 5: ...G Naturalgas LPG Naturalgas LPG 450 120 550 12 4 6 55 21 360 40 30 50 2 Town gas 2 Town gas 2 Town gas 2 Town gas OUTRANGE TECHNICAL DATA Type designation BG 450 DIMENSIONS 1 Calorificvalue Natural ga...

Page 6: ...TECHNICAL DATA DIMENSIONSOFFLANGE 172 215 19 00 01 14 210 254 280 163...

Page 7: ...itch maxi 6a Mainvalve 7 1 2 3 5a 5b 4 6b 6a 10 Incorporated in the MultiBloc 9 6b Safetyvalve 1 7 Valveprovingsystem 9 Air pressure switch 10 Gasburnercontrol Pos 5b 7 Components not required accordi...

Page 8: ...very useful DO LIKE THIS Remove the cover of the fan hous ing LoosenthenutDofthegasassem bly package Loosen ignition cable and ionisa tion cable of gas assembly Loosen the screw A on both sides Pull o...

Page 9: ...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 ELECTRICFUNCTIONTEST Ensurethatphaseandneutr...

Page 10: ...MEASURES AND CHECKS BEFORE START UP INNER ASSEMBLY Town gas INNER ASSEMBLY Natural gas LPG INNER ASSEMBLY Biogas UV detector 172 205 18 97 01 Propan Naturgas...

Page 11: ...essure 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 Gasquality kWh Nm3 kJ Nm3 kcal Nm3 Naturalgas 10 3 37...

Page 12: ...perating switch S3 Control thermostat S4 Temperature limiter S5 Micro switch for hinged door S7 Main switch S8 Air pressure swith S9 Gas pressure switch T1 Ignition transformer X1 Connection terminal...

Page 13: ...ration 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...

Page 14: ...ressing the reset button 0 5 3 s Connecting signal ampliier Alarm control table Red lashing code on signal lamp LED Possible causes Flashing 2 x No lame at End of TSA Defective or obscured lame monito...

Page 15: ...Theflowadjustmentcanalsobemade by means of the governor Adjust the outlet pressure to a value giving the desired gas flow on the fully open valve Atsmallcapacities gasflows it is also necessary to ad...

Page 16: ...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 ADJUSTM...

Page 17: ...ichthegasswitchshouldswitchoff Set this pressure by means of the valve Carefully turn the knob see figure until the gas pressure switch switches off The value shown on the scale should then approximat...

Page 18: ...Troublefreeoperationisdependenton three factors electricity gas and air supply Should there be any changes intheratiobetweenthesethreefactors there is a risk of break downs It has beenprovedthatmostbr...

Page 19: ...cient 5 Is the gas relay of the burner ready for start and not lockedout 6 Is the air supply to the burner sufficient To facilitate fault location we have drawn up a scheme showing the most frequent f...

Page 20: ...on the secondary side The ignition cable and the ionisation cable have been transposed Noflameestablishmentinspiteofatroublefreestart Thegassolenoidvalvedefective The gas solenoid valve does not open...

Page 21: ...cell is in a wrong position Voltage drop at certain times Air pressure switch defective or incorrectly adjusted Spark over in ignition electrodes REMEDY Contact the electricity authorities Adjusttheig...

Page 22: ...ply Insulate the chimney CAUSE The ambient temperature of the gas relay is too high The ignition spark is too weak Badcombustion Bad draught conditions The flue gas temperature is too high The CO2 con...

Page 23: ...le marquage CE de conformit Ljungby Sweden 141127 27 11 14 ENERTECH AB Bentone Division Box 309 SE 341 26 Ljungby Sweden H kan Lennartsson Enertech AB declares that the above mentioned products compl...

Page 24: ...ample room ther mostat if any 4 Check that the gas pressure to the burner is sufficient 5 Check that the electric fuses have not blown 6 Make a new attempt to start the burner and check the counter of...

Page 25: ...Measure ment Before After C A mbar mbar Small flame Large flame Measures Date Nm3 gas h Governor CO2 CO Flue gas temp Ionisa tion current Pressure Efficiency Fire room Chimney Measure ment Before Aft...

Page 26: ......

Page 27: ......

Page 28: ...Enertech AB P O Box 309 SE 341 26 Ljungby www bentone se www bentone com...

Reviews: