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General rules

The installation of an oil burner should 
be carried out in accordance with local 
regulations. The installer of the burner 
must therefore be aware of all regula-
tions relating to oil and combustion.
Only oil suitable for the burner should 
be used and then in combination with 

a suitable oil filter before the oil pump 

of the burner.
If the burner is replacing an existing 

burner make sure that the oil filter is 

replaced or cleaned. The installation 
must only be undertaken by expe-
rienced personnel. 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.

Installation instructions

General installation instructions ac-
company the burner and should be 
left in a prominent place adjacent to 
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 manufactu-
rers instructions.These must include 

the checking of flue gas temperatures, 

average water temperature and CO

2

 

or O

2

 concentration.

To adjust the combustion device, 
start by increasing the air volume 
somewhat.

When the burner starts it is  burning 

with excess air and smoke number 
0. Reduce the air volume until soot 
occurs and increase again to reach 
a combustion free of soot.
By this procedure an optimum adjust-
ment is obtained. If larger nozzles 
are used the preadjustment of the air 
volume must be increased.

Condensation in chimney

A modern burner works with less 
excess air and often also with smal-
ler nozzles than older models. This 

increases the efficiency but also the 

risk of condensation in the chimney. 
The risk increases if the area of the 

chimney flue is too large. The tempe

-

rature of the flue gases should exceed 

60°C measured 0,5 metres from the 
chimney top.

Pump adjustment

See separate description. 

Adjustment of burner

To obtain a correct adjustment a 

flue gas analysis and a temperature 

measurement must be carried out. 
Otherwise there is a risk that a bad 
adjustment may cause a formation of 

soot, bad efficiency or condensate in 

the chimney.

Maintenance

The boiler/burner should be examined 

regularly for any signs of malfunction 
or oil leakage.

GENERAL INSTRUCTIONS

Measures to raise the temperature:
Insulate the chimney in cold attics
Install a tube in the chimney
Install a draught regulator (dilutes the 

flue gases during operation and dries 

them up during standstill)
Increase the oil quantity

Raise  the  flue  gas  temperature  by 

removing turbulators, if any, in the 
boiler.

Instructions for use

The end user of the burner should be 
instructed about the operation and 
safety features of the burner.
He should also be made aware of 
the  importance of the area around 

the  boiler/burner  being  kept  free  of 

combustible material.

Air adjustment 0 - 32

171 305 69  07-01

Adjustment of nozzle assembly 0 - 22

Summary of Contents for ST120KA

Page 1: ...178 009 15 Installation and maintenance instruction BENTOFLEX ST120KA...

Page 2: ...ables 5 Nozzle assembly 6 Nozzle 7 Brake plate 8 Blast tube 9 Ignition electrodes 10 Connecting pipe 11 Air damper 12 Solenoid valve 13 Pump 14 Drive coupling 15 Indication air damper 16 Fan wheel 17...

Page 3: ...utput range and nozzles recommended The net calorific value of 11 86 kWh kg for light oil has been used Burner tube Length of burner tube Incl flange A Measure B Incl flange B Measure B Incl flange C...

Page 4: ...TECHNICAL DATA 171 215 76 07 01 Flange A 10 3 25 130 150 89 7 Flange C 10 125 90 4 Flange D 125 150 10 3 90 5 12 Flange B 89 5 12 136 150 Dimensions...

Page 5: ...ombustion free of soot By this procedure an optimum adjust ment is obtained If larger nozzles are used the preadjustment of the air volume must be increased Condensation in chimney A modern burner wor...

Page 6: ...MAINTENANCE OF OIL BURNER Warning Before doing any service switch off power at the main switch and cut off the oil supply 171 305 68 07 01 Service of burner head and nozzle assembly...

Page 7: ...R1 Photoresistor S3 Main switch T1 Ignition transformer Y1 Solenoid valve X1 Plug in contact burner X2 Plug in contact boiler Outer electrical connection Mains connection and fuses in accordance with...

Page 8: ...d by means of the main switch or the thermostat a new start takes place when the conditions in accordance with point 1 are fulfilled The oil burner control cuts out A red lamp in the control is lit Pr...

Page 9: ...mercial quality according to current standards On commis sioning with an empty tube system the oil pump should not be run without oil for more than 5 min a condition is that the pump is being lubricat...

Page 10: ...stances the oil pressure falls below the set value andthevalveclosesagainstthe returnside R bymeansofthe diaphragm D andgoesintostarting position This can be remedied by Reducing the pump pressure Red...

Page 11: ...93 9 71 115 99 10 24 121 104 10 73 127 109 3 00 9 98 118 102 10 59 126 108 11 16 132 114 11 71 139 119 3 50 11 65 138 119 12 35 146 126 13 03 154 133 13 66 162 139 4 00 13 31 158 136 14 12 167 144 14...

Page 12: ...1 21 133 114 11 67 138 119 12 11 144 123 12 53 148 128 3 00 12 23 145 125 12 73 151 130 13 21 157 135 13 67 162 139 3 50 14 27 169 145 14 85 176 151 15 42 183 157 15 95 189 163 4 00 16 31 193 166 16 9...

Page 13: ...magnetic valve Burner fails to start Lamp not lit Motor runs Burner runs to lockout Fuse has blown Appliance thermostat has not reset Appliance overheat device has operated Control relay or photocell...

Page 14: ...B20 B30 B40 B45 02119815004 B50 B60 B70 B80 040588622001 B55 040588622002 B65 Enertech AB declares under sole responsibility that the above mentioned product is in conformity with the following stand...

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