The net calorific value of 11,86 kWh/kg for light oil has been used.
RECOMMENDED NOZZLE
Because of different boiler types existing
on the market, with varying combustion
chamber designs, it is not possible to
BURNER HEAD
E
6,0-8,0
state a definite spray angle or spray
pattern.
Note that the spray angle and the
spray pattern change with the pump
pressure.
2,4-3,2
(-1,0)-0,0
10,0-11,0
171 215 21 04-01
Page 5
GENERAL INSTRUCTIONS
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
regulations 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 experienced 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 accompany 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 manufacturers
instructions.These must include the
checking of flue gas temperatures,
average water temperature and CO2 or
O2 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 adjustment is obtained. If larger nozzles are
used the preadjustment of the air
volume must be increased.
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.
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.
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.
MAINTENANCE
The boiler/burner should be examined regularly for any signs of malfunction or oil leakage.
FASTENING OF THE BURNER
TO THE BOILER (FLANGE)
CONDENSATION IN CHIMNEY
A modern burner works with less excess air and often also with smaller
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 temperature of the flue gases should exceed
60°C measured 0,5 metres from the
chimney top.
Measures to raise the temperature:
Insulate the chimney in cold attics
AIR ADJUSTMENT
171 305 17 06-01
Page 6
MAINTENANCE OF OIL BURNER
Warning: Before doing any service switch off power at the main switch and cut off the oil supply.
SERVICE OF BURNER HEAD
(alt. A)
1. Remove the cover.
2. Withdraw the photo resistor.
3. Loosen the connecting pipe.
4. Loosen two fixing screws of the
nozzle assembly cover.
5. Retract the nozzle assembly so
far that the ignition cables can be
removed from the ignition
electrodes.
6. Remove the nozzle assembly.
SERVICE OF BURNER HEAD
(alt. B)
1. Slacken retaining screws.
2. Remove the burner.
3. Loosen the two blast tube retaining
screws.
4. Turn the tube to the right and remove.
SUSPENSION OF BURNER
A. Pin for suspension of burner.
A
B. Hole for suspension (also avail-
able on the right side).
CLEANING OF FAN WHEEL
Loosen five fixing screws.
Remove the fan housing half.
171 305 14 95-01
Page 7
ELECTRIC EQUIPMENT
OIL BURNER CONTROL: LOA21... / LOA24...
FUNCTION
1.Switch on operating switch and twin thermostat
The burner motor starts, an ignition spark is formed, the prepurge goes
on till the prepurge period expires and the solenoid valve opens (2).
2.Solenoid valve opens
Oil mist is formed and ignited. The photocell indicates a flame.
(1)The ignition spark goes out 15 s. after flame indication (LOA24.171...).
(2)The ignition spark goes out 2 s. after flame indication when the ignition
transformer is connected to terminal 7 (LOA24.173...).
3.The safety time expires
a. If no flame is established before this time limit the control cuts out.
b. If for some reasons the flame disappears after this time limit, the
burner will make an attempt to re-start.
3-4.Operating position
If the burner operation is interrupted 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. Press the reset button and the burner
re-starts.
WIRING DIAGRAM
(1)(2)
Post-ignition
(2)If a post-igniton of 15 s. is wanted, move the ignition transformer from
terminal 7 to terminal 6 (LOA24.173...).
LIST OF COMPONENTS
A1 Oil burner controlR1 Photoresistor
A2 Twin thermostatS3 Main switch
F1 Fuse, max. 10AT1 Ignition transformer
H1 Alarm lampY1 Solenoid valve
H2 Signal lamp (optional)X1 Plug-in contact, burner
M1 Burner motorX2 Plug-in contact, boiler
P1 Time meter (optional)
Mains connection and fuses in accordance with local regulations.
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 flame failure:max. 1 s
Ambient temperature:from - 20 to +60°C
Min. current with flame established:65 A
Max. photo current at start:5 A
Enclosure:IP 40
(Under voltage proof only LOA24...)
*
* 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.
OUTER ELECTRICAL CONNECTION
X1
X2
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).
171 415 20 04-01
Page 8
INSTRUCTIONS PUMP TYPE DANFOSS BFP41
TECHNICAL DATA
Viscosity range:1,3-12,0 mm2/s
Pressure range:7-15 bar
Oil temperature:-10 to +70°C
COMPONENTS
1.Nozzle port G 1/8"
2.Pressure gauge port
3.Pressure adjustment, 4mm allen key
4. Cartridge filter
5.Vacuum gauge port G 1/8"
6.Return line G 1/4"
7.Suction line G 1/4"
8.Return plug
SUCTION LINE TABLES
The suction line tables consist of
theoretically calculated values where
the pipe dimensions and oil velocity
have been matched so that turbulences
will not occur. Such turbulences will
result in increased pressure losses and
in acoustic noise in the pipe system. In
addition to drawn copper piping a pipe
system usually comprises 4 elbows, a
non-return valve, a cut-off valve and
an external oil filter.
The sum of these individual resistances
is so insignificant that they can be
disregarded. The tables do not include
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.
With an underlying tank a 1-pipesystem is not recommended
Two-pipe system
HeightPipe diameter
Hø6 mmø8 mm ø10 mm
mmmm
01753100
-0,51547100
-1,0134199
-1,5113484
-2,092868
-2,572253
-3,051537
-3,53922
4,0136
171 505 07 96-01
Page 9
FUNCTION DANFOSS BFP41
When the oil pump is started, oil is
drawn from the suction connection (S)
through the filter (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
the oil quantity supplied by the gear
set (C) between the nozzle port (E)
and the return side of the pump (R).
The oil quantity utilized is determined
by the set pressure on the regulating
valve (P1) and the size of the oil nozzle
in the nozzle line.
The valve (P1) functions in the following
way:
- When the opening pressure has been
reached, the passage to the return
side opens.
- The diaphragm and the spring keep
the pump pressure constant at set
value.
- If the pump is overloaded, i.e. if you
try to get out more oil than the gear
V
P
H
C
S
G
A
R
set can supply under existing circumstances, the oil pressure falls below
the set value and the valve closes
against the return side (R) by means
of the diaphragm (D) and goes into
starting position.
This can be remedied by:
- Reducing the pump pressure.
- Reducing the oil quantity supplied
by using a smaller nozzle.
- Using a pump with a larger capacity.
NC
E
D
P
1
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 (high capacity - small
difference)
HOW TO REMOVE CARTRIDGE
FILTER FROM PLUG
Unscrew the cartridge filter plug in the
cover by means of a 4 mm allen key
and withdraw the cartridge filter. If
necessary, put a screwdriver between
the cartridge filter and the plug and
turn the cartridge filter carefully until it
comes off. Reject the cartridge filter
and replace it by a new one. Press it
on to the plug. Ensure that the O-ring
is not damaged. Then fit the new
cartridge filter to the pump.
REPLACEMENT OF CARTRIDGE
FILTER
MOUNTING/DISMOUNTING
RETURN PLUG
One pipe system
Two pipe system
171 505 08 00-01
Page 10
NOZZLE TABLE
Gph89101112131415
kg/hkW Mcal/hkg/hkW Mcal/hkg/hkW Mcal/hkg/hkW Mcal/hkg/hk W Mcal/h kg/hkW Mcal/h kg/hkW Mcal/hkg/hk W Mcal/h
to which this declaration relates is in conformity with the following standard(s) or the normative document(s)
(title and/or number and date of issue of the standard(s) or other normative document(s)