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MOUNTING OF THE BURNER

172 205 88  07-01

To facilitate the mounting of the boiler 

the burner head with gas lange and 

pull rods can be removed from the 
burner.

DO LIKE THIS:

Loosen the screw "A" on both sides 
and the two stop bolts at the end of 
the pull rods. Remember that the 
electric cables to solenoid valve and 
gas switch are also disconnected.

When the burner head and the gas 

lange have been itted to the boiler 

it is easy to lift the burner on to the 
pull rods.

If the gas assembly needs to be in-
spected the pull rods are very use-
ful.
Loosen the screw "A" and pull out 
the burner on the pull rods. Loosen 
the screws "B" and withdraw the gas 
assembly.

Ensure that the O-ring between the 

gas assembly and the gas lange will 

be in the correct position when the 

gas assembly is itted again.

NOTE!

For maintenance of the brake plate, 
nozzles, electrodes etc, when using 
a long design of the burner tube, you 
have to 

remove the nozzle assembly 

from the connecting pipe and move 
the assembly backwards

 in the fan 

housing (from the boiler).

170 091 16  08-01

Gas burner

FAULT LOCATION GUIDE

The basis for trouble free operation can only be ensured 

by the correct combined effect of the three factors:

electricity, gas low and combustion air. Should any of 

these factors change troubles may arise.

It has been proved that many troubles have rather sim-
ple causes. Before calling the serviceman the following 

checks should be made:

1.  Are the gas cocks of the installation open?
2.  Are the fuses in order and the current switched 

on?

3.  Are the controls (room thermostat, boiler thermostat 

etc.) correctly adjusted?

4. 

Is the gas pressure to the burner suficient?

5.  Is the gas relay of the burner ready for start and 

not locked out?

6. 

Is the air supply to the burner suficient?

To facilitate fault location we have drawn up a scheme 
showing the most frequent faults in a gas burner instal-
lation and the remedies.

REMEDY

The burner does not start

No gas

Check that all gas cocks are open.

No voltage

Check fuses, thermostats and electrical connections

The burner motor fails to start

The thermal protection has locked out. Motor 
defective.

The gas relay is defective

Replace

Burner motor is running but no ignition after 
the prepurge time has elapsed

No voltage on the terminals

Check the contact. Replace faulty relay

The ignition electrodes in contact with each other 
or with earth

Adjust

The porcelain of the electrodes is broken

Replace the electrodes

CAUSE

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Содержание BG 700-2

Страница 1: ...178 001 80 Installation and maintenance instruction BG 700 2...

Страница 2: ......

Страница 3: ...p 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 the bo...

Страница 4: ...eclare under our sole responsibility that the product name type or model batch or serial number possibly sources and number of items BG100 BG150 BG200 STG120 STG146 BG300 BG300LN BG400 BG400LN BG450 B...

Страница 5: ...s not suficient Increase the lue gas temperature by increasing the gas supply Insulate the chimney REMEDY CAUSE 4 4 927 230 A 199 820 403 513 781 403 413 Capacity chart according to EN 676 Out range T...

Страница 6: ...sations at start The ignition electrodes are wrongly adjusted Readjust The gas pressure is too high Check and adjust by means of a pressure gauge and a pressure adjustment valve The lue gas side is bl...

Страница 7: ...relay defective Replace Air pressure switch incorrectly adjusted or defective Check the adjustment and readjust No reponse as the cams of the servomotor are not correctly adjusted or out of position T...

Страница 8: ...nly be ensured by the correct combined effect of the three factors electricity gas low and combustion air Should any of these factors change troubles may arise It has been proved that many troubles ha...

Страница 9: ...ity gasandair supply Should there be any changes intheratiobetweenthesethreefactors there is a risk of break downs It has been proved that most break downs are caused by simple faults Before callingth...

Страница 10: ...e reason for a low ionisation current may be leaking currents bad connec tion to earth dirt or a faulty position of the lame electrode in the burner head Sometimes also a faulty gas air mixturemaycaus...

Страница 11: ...ner is converted to ire another gas quality it must be re commissioned If town gas is to be ired the combustion head must be converted and the gas train adjusted to suit e g a larger gas armature or a...

Страница 12: ...nd the motor will be dead Remove the link from the gas pressure switch after the test is inished 172 205 34 07 01 Leakage control Gas train Noteon2 stageandmodulatingburn ers that during the pre purgi...

Страница 13: ...ipple inlet pressure 11 Test nipple pressure after governor 12 Test nipple before governor 13 Filter Max inlet pressure 360 mbar Adjustable governor pressure 405 412 S50 4 50 mbar 415 420 S20 4 20 mba...

Страница 14: ...formation please contact the gas distributor 172 305 54 08 01 FUNCTION 2 STAGE DESIGN Air adjustment The damper motor turns the damper between three pre set positions fully closed low load full load T...

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