Enertech BENTOFLEX ST108FUV Technical specifications

178 001 14
Installation- and maintenance instruction
BENTOFLEX ST108FUV

DESCRIPTION
1. Reset button
2. Control box
3. Ignition transformer
4. Ignition cables
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. Adjustment, air damper
18. Photoresistor
19. Motor
171 205 32 07-01
Components

Dimensions
171 225 03 08-01
TECHNICAL DATA
Electrode adjustment
Because of different boiler types
existing on the market, with varying
combustion chamber designs, it is
not possible to state a denite spray
angle or spray pattern.
Recommended nozzle Note that the spray angle and the
spray pattern change with the pump
pressure.
Output range and nozzles recommended
The net caloric value of 11,86 kWh/kg for light oil has been used.
Burner tube Length of burner
tube Incl. ange A Measure B Incl. ange B Measure B Incl. ange C Measure B Incl. ange D Measure B
FUV 103 68 81 66 65
FUV 133 98 111 119 118
B
188
275
145
ø89
56
239
162
Burner tube Oil capacity Outputy Recommended
Nozzle Recommended Pump pressure
kg/h kW Mcal/h Angle Type Bar
FUV 1,2-2,9 14-34 12-30 60°, 80° H, S 10
ST 108 FUV
1,6-2,0 (- 0,1) + 0,5
7,0-8,0

TECHNICAL DATA
171 215 76 07-01
Flange A
10,3
25
130-150
ø89,7 Flange C
10
125
ø90 4
Flange D
125-150
10,3
ø90 5
12
Flange B
ø89,5 12
136-150
Dimensions

General rules
Theinstallationofanoilburnershould
becarriedoutinaccordancewithlocal
regulations.Theinstalleroftheburner
mustthereforebeawareofallregula-
tions relating to oil and combustion.
Onlyoilsuitable fortheburner should
beused and thenin combination with
a suitable oil lter before the oil pump
of the burner.
If the burner is replacing an existing
burner make sure that the oil lter is
replaced or cleaned. The installation
must only be undertaken by expe-
rienced personnel. Care should be
takenbytheinstallertoensurethatno
electrical cables or fuel/gas pipes are
trappedordamagedduringinstallation
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
Theburner is fromthe factory pre-set
toanaveragevaluethatmustthenbe
adjusted to the boiler in question.
Allburneradjustmentsmustbemade
in accordance with boiler manufactu-
rers instructions.These must include
the checking of ue gas temperatures,
average water temperature and CO2
or O2concentration.
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.
Bythisprocedureanoptimumadjust-
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 efciency but also the
risk of condensation in the chimney.
The risk increases if the area of the
chimney ue is too large. The tempe-
rature of the ue 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
ue 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 efciency 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
Installadraughtregulator(dilutesthe
ue gases during operation and dries
them up during standstill)
Increase the oil quantity
Raise the ue 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

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

171 415 21 07-01
List of components
A1 Oil burner control
A2 Twin thermostat
E1 Preheater
F1 Fuse, max. 10A
H1 Alarm lamp
H2 Signal lamp (optional)
M1Burner motor
P1 Time meter (optional)
R1 Photoresistor
S3 Main switch
T1 Ignition transformer
Y1 Solenoid valve
X1 Plug-in contact, burner
X2 Plug-in contact, boiler
The colours of the preheater cable:
A Blue
B Brown
C Black
*
(1)(2)
Outer electrical connection
Wiring diagram
* Ifthereisnoplug-incontact(X2)ontheboiler,connecttothecontact
enclosed.Incasethe twinthermostatisinseries onincomingphase
L1, a loop between the terminals T1 and T2 is necessary.
Mains connection and fuses in
accordance with local regulations.
ELECTRIC EQUIPMENT
Oil burner control: LOA21... / LOA24..
With preheater.
X1
X2
1(2)

171 415 21 07-01
Function
1. Switch on operating switch and twin thermostat
Voltage is applied to the preheater and the preheating period starts.
This period lasts till the operating temperature of the oil has been
reached and the preheater thermostat closes (2).
2. Preheater thermostat closes
Theburnermotorstarts,anignitionsparkisformed,theprepurgegoes
on till the prepurge period expires and the solenoid valve opens (3).
3. Solenoid valve opens
Oil mist is formed and ignited. The photocell indicates a ame.
(1) The ignition spark goes out 15 s. after ame indication (LOA24.171...).
(2) The ignition spark goes out 2 s. after ame indication when the
ignition transformer is connected to terminal 7 (LOA24.173...).
4. The safety time expires
a. If no ame is established before this time limit the control cuts out
b. If for some reasons the ame disappears after this time limit, the
burner will make an attempt to re-start.
4-5. Operating position
Iftheburneroperationisinterruptedbymeansofthemainswitchorthe
thermostat, a new start takes place when the conditions in accordance
with point 1 are fullled.
The oil burner control cuts out
A red lamp in the control is lit. Press the reset button and the burner
re-starts.
Post-ignition
(2) If a post-ignition of 15 s. is wanted, move the ignition transformer
from terminal 7 to terminal 6 (LOA24.173...).
Technical data
Pre-ignition time: 13 s
Pre-purge time: 13 s
(1) Post-ignition time: 15 s
(2) Post-ignition time: 2 s
Safety lock-out time: 10 s
Reset time after lockout: ≈50 s
Reaction time on ame failure: max. 1 s
Ambient temperature: from - 20 to +60°C
Min. current with ame established: 65µ A
Max. photo current at start: 5µ A
Enclosure: IP 40
(Under voltage proof only LOA24...)
Control of photo current
Current through photo unit is measured with a d.c. ammeter
(a moving coil instrument connected in series with the photo unit).
ELECTRIC EQUIPMENT
Oil burner control: LOA21... / LOA24..
With preheater.
2(2)

INSTRUCTIONS PUMP TYPE DANFOSS BFP41
Components
1 Nozzle port G1/8"
2. Pressure gauge port
3. Pressure adjustment, 4mm allen key
4. Cartridge lter
5. Vacuum gauge port G1/8"
6. Return line G¼"
7. Suction line G¼"
8. Return plug
Technical data
Viscosity range: 1,3-12,0 mm2/s
Pressure range: 7-15 bar
Oil temperature: -10 to +70°C
Suction line tables
The suction line tables consist of
theoreticallycalculated values where
the pipe dimensions and oil velocity
havebeenmatchedsothatturbulences
will not occur. Such turbulences will
resultinincreasedpressurelossesand
inacousticnoiseinthepipesystem.In
additiontodrawncopperpipingapipe
system usually comprises4 elbows, a
non-returnvalve,acut-offvalveandan
external oil lter.
Thesumoftheseindividualresistances
is so insignicant that they can be
disregarded.Thetablesdonotinclude
any lengths exceeding 100 m as
experience shows that longer lengths
are not needed.
The tables apply to a standard fuel
oil of normal commercial quality
according to current standards. On
commissioning 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
lubricated during operation).
The tables state the total suction line
length in metres at a nozzle capacity
of 2,5 kg/h. Max. permissible
pressure at the suction and pressure
side is 2,0 bar.
Purging
On 1-pipe systems it is necessary to
purge the pump. On 2-pipe systems
purging is automatic through the
return line.
171 505 07 10-01
Two-pipe system
Height Pipe diameter
H ø6 mm ø8 mm ø10 mm
m m m m
0 17 53 100
-0,5 15 47 100
-1,0 13 41 99
-1,5 11 34 84
-2,0 9 28 68
-2,5 7 22 53
-3,0 5 15 37
-3,5 3 9 22
4,0 1 3 6
Height Pipe diameter
H ø4 mm ø5 mm ø6 mm
m m m m
Height Pipe diameter
H ø6 mm ø8 mm ø10 mm
m m m m
4,0 33 100 100
3,5 31 98 100
3,0 29 91 100
2,5 27 85 100
2,0 25 79 100
1,5 23 72 100
1,0 21 66 100
0,5 19 60 100
Height Pipe diameter
H ø4 mm ø5 mm ø6 mm
m m m m
4,0 51 100 100
3,5 45 100 100
3,0 38 94 100
2,5 32 78 100
2,0 26 62 100
1,5 19 47 97
1,0 13 31 65
0,5 6 16 32
1-pipe system 1-pipe system
With an underlying tank a 1-pipe-
system is not recommended
Two-pipe system
H
H

Function Danfoss BFP41
When the oil pump is started, oil is
drawn from the suction connection
(S) through the lter (H) to the suction
side of the gear wheel (C).
The gear wheel then pumps oil to the
pressure side and the oil is put under
pressure.
The pressure is controlled and kept
constant at the set value by the
regulating valve (P1) with the
diaphragm (D).
The regulating valve (P1) distributes
theoilquantitysuppliedbythegearset
(C) between the nozzle port (E) and
the return side of the pump (R).
Theoilquantityutilizedisdetermined
by the set pressure on the regulating
valve(P1)andthesizeoftheoilnozzle
in the nozzle line.
The valve (P1) functions in the following
way:
- When the opening pressure has
beenreached,thepassagetothe
return side opens.
- Thediaphragmandthespring
keepthepumppressureconstant
at set value.
- Ifthepumpisoverloaded,i.e.if
you try to get out more
oilthanthegearsetcansupply
underexistingcircum-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.
- Reducingtheoilquantitysupplied
by using a smaller nozzle.
- Using a pump with a larger capacity.
171 505 08 07-01
Replacement of cartridge lter
Burner with preheating
Consider that the oil quantity is
reduced at preheating by 5-20%
depending on.
- Rise in temperature at the nozzle
- Nozzle design
- Capacity(highcapacity-small
difference)
Mounting/dismounting return plug
How to remove cartridge lter
from plug
Unscrew the cartridge lter plug in
the cover by means of a 4 mm allen
key and withdraw the cartridge lter. If
necessary,putascrewdriverbetween
the cartridge lter and the plug and
turn the cartridge lter carefully until
it comes off. Reject the cartridge lter
and replace it by a new one. Press it
on to the plug. Ensure that the
O-ring is not damaged. Then t the
new cartridge lter to the pump.
One pipe system Two pipe system
R
S
E
NC
A
G
H
V
P1
P
D
C
INSTRUCTIONS PUMP TYPE DANFOSS BFP41

171 505 44 07-01
Gph 8 9 10 11
kg/h kW Mcal/h kg/h kW Mcal/h kg/h kW Mcal/h kg/h kW Mcal/h
0,40 1,33 16 13 1,41 17 14 1,49 18 15 1,56 18 16
0,50 1,66 20 17 1,76 21 18 1,86 22 19 1,95 23 20
0,60 2,00 24 20 2,12 25 22 2,23 26 23 2,34 28 24
0,65 2,16 26 22 2,29 27 23 2,42 29 25 2,54 30 26
0,75 2,49 29 25 2,65 31 27 2,79 33 28 2,93 35 30
0,85 2,83 33 29 3,00 36 31 3,16 37 32 3,32 39 34
1,00 3,33 39 34 3,53 42 36 3,72 44 38 3,90 46 40
1,10 3,66 43 37 3,88 46 39 4,09 48 42 4,29 51 44
1,20 3,99 47 41 4,24 50 43 4,47 53 46 4,68 55 48
1,25 4,16 49 42 4,40 52 45 4,65 55 47 4,88 58 50
1,35 4,49 53 46 4,76 56 48 5,02 59 51 5,27 62 54
1,50 4,98 59 51 5,29 63 54 5,58 66 57 5,85 69 60
1,65 5,49 65 56 5,82 69 59 6,14 73 63 6,44 76 66
1,75 5,82 69 59 6,18 73 63 6,51 77 66 6,83 81 70
2,00 6,65 79 68 7,06 84 72 7,45 88 76 7,81 93 80
2,25 7,49 89 76 7,94 94 81 8,38 99 85 8,78 104 89
2,50 8,32 99 85 8,82 105 90 9,31 110 95 9,76 116 99
2,75 9,15 108 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 14,89 176 152 15,62 185 159
4,50 14,97 177 153 15,88 188 162 16,75 198 171 17,57 208 179
5,00 16,64 197 170 17,65 209 180 18,62 221 190 19,52 231 199
5,50 18,30 217 187 19,42 230 198 20,48 243 209 21,47 255 219
6,00 19,97 237 204 21,18 251 216 22,34 265 228 23,42 278 239
6,50 21,63 256 220 22,94 272 234 24,20 287 247 25,37 301 259
7,00 23,29 276 237 24,71 293 252 26,06 309 266 27,33 324 279
7,50 24,96 296 254 26,47 314 270 27,92 331 285 29,28 347 298
8,00 26,62 316 271 28,24 335 288 29,79 353 304 31,23 370 318
8,50 28,28 335 288 30,00 356 306 31,65 375 323 33,18 393 338
9,00 29,95 355 305 31,77 377 324 33,59 398 342 35,14 417 358
NOZZLE TABLE
Pump pressure bar
The table applies to oil with a viscosity of 4,4 mm2/s (cSt) with density 830 kg/m3.
Burner with preheater
Consider that on preheating the oil quantity is reduced by 5-20% depending on.
- Rise in temperature at the nozzle
- Design of nozzle
- Capacity (high capacity - small difference)
1(2)

171 505 44 07-01
Gph 12 13 14 15
kg/h kW Mcal/h kg/h kW Mcal/h kg/h kW Mcal/h kg/h kW Mcal/h
0,40 1,63 19 17 1,70 20 17 1,76 21 18 1,82 21 18
0,50 2,04 24 21 2,12 25 22 2,20 26 22 2,28 27 23
0,60 2,45 29 25 2,55 30 26 2,64 31 27 2,73 32 28
0,65 2,65 31 27 2,75 33 28 2,86 34 29 2,96 35 30
0,75 3,08 36 31 3,18 38 32 3,30 39 34 3,42 40 35
0,85 3,47 41 35 3,61 43 37 3,74 44 38 3,87 46 39
1,00 4,08 48 42 4,24 50 43 4,40 52 45 4,56 54 46
1,10 4,48 53 46 4,67 55 48 4,84 57 49 5,01 59 51
1,20 4,89 58 50 5,09 60 52 5,29 63 54 5,47 65 56
1,25 5,10 60 52 5,30 63 54 5,51 65 56 5,70 68 58
1,35 5,50 65 56 5,73 68 58 5,95 70 61 6,15 73 63
1,50 6,11 72 62 6,36 75 65 6,60 78 67 6,83 81 70
1,65 6,73 80 69 7,00 83 71 7,27 86 74 7,52 89 77
1,75 7,14 85 73 7,42 88 76 7,71 91 79 7,97 94 81
2,00 8,18 97 83 8,49 101 86 8,81 104 90 9,12 108 93
2,25 9,18 109 94 9,55 113 97 9,91 117 101 10,26 122 105
2,50 10,19 121 104 10,61 126 108 11,01 130 112 11,39 135 116
2,75 11,21 133 114 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 16,97 201 173 17,62 209 180 18,23 216 186
4,50 18,35 217 187 19,10 226 195 19,82 235 202 20,51 243 209
5,00 20,39 242 208 21,22 251 216 22,03 261 225 22,79 270 232
5,50 22,43 266 229 23,34 277 238 24,23 287 247 25,07 297 256
6,00 24,47 290 249 25,46 302 260 26,43 313 269 27,49 326 280
6,50 26,51 314 270 27,58 327 281 28,63 339 292 29,63 351 302
7,00 28,55 338 291 29,70 352 303 30,84 366 314 31,91 378 325
7,50 30,59 363 312 31,83 377 324 33,04 392 337 34,19 405 349
8,00 32,63 387 333 33,95 403 346 35,25 418 359 36,47 432 372
8,50 34,66 411 353 36,07 428 368 37,45 444 382 38,74 459 395
9,00 36,71 435 374 38,19 453 389 39,65 470 404 41,02 486 418
NOZZLE TABLE
The table applies to oil with a viscosity of 4,4 mm2/s (cSt) with density 830 kg/m3.
Burner with preheater
Consider that on preheating the oil quantity is reduced by 5-20% depending on.
- Rise in temperature at the nozzle
- Design of nozzle
- Capacity (high capacity - small difference)
2(2)
Pump pressure bar

FAULT LOCATION
Burner fails to start
Delayed ignition, burners starts violently
Burner fails to start after normal operation
Situation
Motor runs
Burner pre-purges
Flame occurs
Burner locks out
Motor runs
Burner pre-purges
No ame occurs
Burner locks out
Possible causes
Flame instability
Incorrect head settings
Low oil pressure
Excess air
Photocell not seeing light
Photocell failed
Control faulty
False light
No spark
No oil
Remedies
Check nozzle to burner head dimension
and electrode position
Check oil pressure
Adjust air damper
Check that photocell is clean and
unobstructed
Conrm with new photocell
Conrm with new control. (NB. it is
advisable to change the photocell if also
changing control)
Check that photocell is not seeing
ambient light
Check that H.T. leads are sound and are
not arcing other than at electrode gap
Check oil supply to burner - check that
pump is not airlocked
Check operation of 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 defective
No oil being delivered
Excessive ue draught is preventing
ame establishment
No spark
Check or replace fuse if necessary.
Check reason for failure
Adjust thermostat
Reset overheat device. Find reason for
its operation and rectify
Check by replacement
Check that tank, oil lines, re valve, pump
and nozzle are all in good order
Rectify condition
Check ignition transformer. Check
electrode gap and porcelain
Burner pulsates on start-up
only with hot ue
Burner pulsates on start-up
Burner starts violently
Excessive draught
Nozzle partly blocked
Oil pressure too low
Flue blocked or damaged
Fan slipping on shaft
Pump coupling loose or worn
Delayed ignition
Adjust the burner
Replace nozzle
Check and adjust
Check and rectify
Check and retighten
Check and replace
Check the electrode adjustment, see
diagram
Check electrodes for damage
Check H.T. leads for damage and
disconnection
171 915 01 08-01

171 905 07 07-01
DECLARATION OF CONFORMITY
Manufacturer: Enertech AB, Bentone Division
Street address: Näsvägen
SE-341 34 Ljungby
Address: P.O. Box 309
SE-341 26 Ljungby
Sweden
Product: Oil burner
Type: BF1, B 1, B 2, B 9, B 10, B 11, B 20, B 30, B 40, B 45,
B 50, B 55, B 60, B 65, B 70, B 80, ST 97, ST 108,
ST 120, ST133, ST 146
Certkat TÜV Süddeutschland
Certikat Nr Burner
XXXXXXXX BF1
0111110535004 B1
0207110535005B2
021198p15001 ST97, ST108, ST120, ST133, ST146
02119815002 B9, B10, B11
02119815003 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 standards or other normative
documents.
Document: EN 267
and follows the provisions of applicable parts in the following EU Directives:
89/336/EEC Electromagnetic compatibility
73/23/EEC Low-voltage directive
89/392/EEC Machinery directive
92/42/EEC Efciency directive
In that the burner conforms to the above mentioned standards it is awarded
the CE mark.
Enertech AB, Bentone Division is quality certied according to SS-EN
ISO 9001:2000
Ljungby 080115
ENERTECH AB
Sven-Olov Lövgren