RN510 - RN515
RN520 - RN525
Progressive, Fully-modulating
Heavy oil Burners
MANUAL OF INSTALLATION - USE - MAINTENANCE
BURNERS - BRUCIATORI - BRULERS - BRENNER - QUEMADORES - ГОРЕЛКИ
M039215CB REL. 1.0 02/2011
WARNINGS
THIS MANUAL IS SUPPLIED AS AN INTEGRAL AND ESSENTIAL PART OF THE PRODUCT AND MUST BE DELIVERED TO THE
USER.
INFORMATION INCLUDED IN THIS SECTION ARE DEDICATED BOTH TO THE USER AND TO PERSONNEL FOLLOWING PRODUCT INSTALLATION AND MAINTENANCE.
THE USER WILL FIND FURTHER INFORMATION ABOUT OPERATING AND USE RESTRICTIONS, IN THE SECOND SECTION
OF THIS MANUAL. WE HIGHLY RECOMMEND TO READ IT.
CAREFULLY KEEP THIS MANUAL FOR FUTURE REFERENCE.
1)
GENERAL INTRODUCTION
shall have qualified personnel carry out the following operations:
a
Remove the power supply by disconnecting the power cord from the
mains.
b) Disconnect the fuel supply by means of the hand-operated shut-off
valve and remove the control handwheels from their spindles.
The equipment must be installed in compliance with the regulations
in force, following the manufacturer’s instructions, by qualified personnel.
 Qualified personnel means those having technical knowledge in the
field of components for civil or industrial heating systems, sanitary
hot water generation and particularly service centres authorised by
the manufacturer.
 Improper installation may cause injury to people and animals, or
damage to property, for which the manufacturer cannot be held liable.
 Remove all packaging material and inspect the equipment for integrity.
In case of any doubt, do not use the unit - contact the supplier.
The packaging materials (wooden crate, nails, fastening devices, plastic
bags, foamed polystyrene, etc), should not be left within the reach of children, as they may prove harmful.
 Before any cleaning or servicing operation, disconnect the unit from
the mains by turning the master switch OFF, and/or through the cutout devices that are provided.
 Make sure that inlet or exhaust grilles are unobstructed.
 In case of breakdown and/or defective unit operation, disconnect the
unit. Make no attempt to repair the unit or take any direct action.
Contact qualified personnel only.
Units shall be repaired exclusively by a servicing centre, duly authorised
by the manufacturer, with original spare parts.
Failure to comply with the above instructions is likely to impair the unit’s
safety.
To ensure equipment efficiency and proper operation, it is essential that
maintenance operations are performed by qualified personnel at regular
intervals, following the manufacturer’s instructions.
 When a decision is made to discontinue the use of the equipment,
those parts likely to constitute sources of danger shall be made harmless.
 In case the equipment is to be sold or transferred to another user, or
in case the original user should move and leave the unit behind,
make sure that these instructions accompany the equipment at all
times so that they can be consulted by the new owner and/or the
installer.
 For all the units that have been modified or have options fitted then
original accessory equipment only shall be used.
 This unit shall be employed exclusively for the use for which it is
meant. Any other use shall be considered as improper and, therefore, dangerous.
The manufacturer shall not be held liable, by agreement or otherwise, for
damages resulting from improper installation, use and failure to comply
with the instructions supplied by the manufacturer.

Special warnings
 Make sure that the burner has, on installation, been firmly secured to
the appliance, so that the flame is generated inside the appliance
firebox.
 Before the burner is started and, thereafter, at least once a year,
have qualified personnel perform the following operations:
a
set the burner fuel flow rate depending on the heat input of the
appliance;
b
set the flow rate of the combustion-supporting air to obtain a combustion efficiency level at least equal to the lower level required by the
regulations in force;
c
check the unit operation for proper combustion, to avoid any harmful
or polluting unburnt gases in excess of the limits permitted by the
regulations in force;
d
make sure that control and safety devices are operating properly;
e
make sure that exhaust ducts intended to discharge the products of
combustion are operating properly;
f
on completion of setting and adjustment operations, make sure that
all mechanical locking devices of controls have been duly tightened;
g
make sure that a copy of the burner use and maintenance instructions is available in the boiler room.
 In case of a burner shut-down, reser the control box by means of the
RESET pushbutton. If a second shut-down takes place, call the
Technical Service, without trying to RESET further.
 The unit shall be operated and serviced by qualified personnel only,
in compliance with the regulations in force.
3)
GENERAL INSTRUCTIONS DEPENDING ON FUEL USED
3a)
ELECTRICAL CONNECTION





2)
SPECIAL INSTRUCTIONS FOR BURNERS

The burner should be installed in a suitable room, with ventilation
openings complying with the requirements of the regulations in force,
and sufficient for good combustion.
 Only burners designed according to the regulations in force should
be used.
 This burner should be employed exclusively for the use for which it
was designed.
 Before connecting the burner, make sure that the unit rating is the
same as delivery mains (electricity, gas oil, or other fuel).
 Observe caution with hot burner components. These are, usually,
near to the flame and the fuel pre-heating system, they become hot
during the unit operation and will remain hot for some time after the
burner has stopped.
When the decision is made to discontinue the use of the burner, the user

For safety reasons the unit must be efficiently earthed and installed
as required by current safety regulations.
It is vital that all saftey requirements are met. In case of any doubt,
ask for an accurate inspection of electrics by qualified personnel,
since the manufacturer cannot be held liable for damages that may
be caused by failure to correctly earth the equipment.
Qualified personnel must inspect the system to make sure that it is
adequate to take the maximum power used by the equipment shown
on the equipment rating plate. In particular, make sure that the
system cable cross section is adequate for the power absorbed by
the unit.
No adaptors, multiple outlet sockets and/or extension cables are permitted to connect the unit to the electric mains.
An omnipolar switch shall be provided for connection to mains, as
required by the current safety regulations.
The use of any power-operated component implies observance of a
few basic rules, for example:
- do not touch the unit with wet or damp parts of the body and/or with
bare feet;
- do not pull electric cables;
- do not leave the equipment exposed to weather (rain, sun, etc.)
unless expressly required to do so;
- do not allow children or inexperienced persons to use equipment;
 The unit input cable shall not be replaced by the user.
In case of damage to the cable, switch off the unit and contact qualified
personnel to replace.
When the unit is out of use for some time the electric switch supplying all
the power-driven components in the system (i.e. pumps, burner, etc.)
should be switched off.
3
DIRECTIVES AND STANDARDS
Gas burners
European directives:
- Directive 2009/142/EC - Gas Appliances;
- Directive 2006/95/EC on low voltage;
- Directive 2004/108/EC on electromagnetic compatibility
Harmonised standards :
-UNI EN 676 (Gas Burners;
-CEI EN 60335-1(Household and similar electrical appliances - Safety.
Part 1: General requirements;
- EN 50165 (Electrical equipment of non-electric appliances for household and similar purposes. Safety requirements.
3b) FIRING WITH GAS, LIGHT OIL OR OTHER FUELS
GENERAL
 The burner shall be installed by qualified personnel and in compliance with regulations and provisions in force; wrong installation
can cause injuries to people and animals, or damage to property, for
which the manufacturer cannot be held liable.
 Before installation, it is recommended that all the fuel supply system
pipes be carefully cleaned inside, to remove foreign matter that might
impair the burner operation.
 Before the burner is commissioned, qualified personnel should
inspect the following:
a
the fuel supply system, for proper sealing;
b
the fuel flow rate, to make sure that it has been set based on the
firing rate required of the burner;
c
the burner firing system, to make sure that it is supplied for the designed fuel type;
d
the fuel supply pressure, to make sure that it is included in the range
shown on the rating plate;
e
the fuel supply system, to make sure that the system dimensions are
adequate to the burner firing rate, and that the system is equipped
with all the safety and control devices required by the regulations in
force.
 When the burner is to remain idle for some time, the fuel supply tap
or taps should be closed.
Light oil burners
European directives:
- Directive 2006/95/EC on low voltage;
- Directive 2004/108/EC on electromagnetic compatibility
Harmonised standards :
-CEI EN 60335-1(Household and similar electrical appliances - Safety.
Part 1: General requirements;
- EN 50165 (Electrical equipment of non-electric appliances for household and similar purposes. Safety requirements.
National standards :
-UNI 7824: Monobloc nebulizer burners for liquid fuels. Characteristics
and test methods
SPECIAL INSTRUCTIONS FOR USING GAS
Have qualified personnel inspect the installation to ensure that:
a
the gas delivery line and train are in compliance with the regulations
and provisions in force;
b
all gas connections are tight;
c
the boiler room ventilation openings are such that they ensure the air
supply flow required by the current regulations, and in any case are
sufficient for proper combustion.
 Do not use gas pipes to earth electrical equipment.
 Never leave the burner connected when not in use. Always shut the
gas valve off.
 In case of prolonged absence of the user, the main gas delivery
valve to the burner should be shut off.
Precautions if you can smell gas
a
do not operate electric switches, the telephone, or any other item
likely to generate sparks;
b
immediately open doors and windows to create an air flow to purge
the room;
c
close the gas valves;
d
contact qualified personnel.
 Do not obstruct the ventilation openings of the room where gas
appliances are installed, to avoid dangerous conditions such as the
development of toxic or explosive mixtures.
Heavy oil burners
European directives:
- Directive 2006/95/EC on low voltage;
- Directive 2004/108/EC on electromagnetic compatibility
Harmonised standards :
-CEI EN 60335-1 Household and similar electrical appliances - SafetyPart
1: General requirements;
- EN 50165 Electrical equipment of non-electric appliances for household
and similar purposes. Safety requirements.
National standards :
-UNI 7824: Monobloc nebulizer burners for liquid fuels. Characteristics
and test methods
Gas - Light oil burners
European directives:
- Directive 2009/142/EC - Gas Appliances;
- Directive 2006/95/EC on low voltage;
- Directive 2004/108/EC on electromagnetic compatibility
Harmonised standards :
-UNI EN 676 Gas Burners
-CEI EN 60335-1(Household and similar electrical appliances - Safety.
Part 1: General requirements;
- EN 50165 Electrical equipment of non-electric appliances for household
and similar purposes. Safety requirements.
National standards :
-UNI 7824: Monobloc nebulizer burners for liquid fuels. Characteristics
and test methods
Gas - Heavy oil burners
European directives:
- Directive 2009/142/EC - Gas Appliances;
- Directive 2006/95/EC on low voltage;
- Directive 2004/108/EC on electromagnetic compatibility
Harmonised standards :
-UNI EN 676 (Gas Burners;
-CEI EN 60335-1(Household and similar electrical appliances - Safety.
Part 1: General requirements;
- EN 50165 Electrical equipment of non-electric appliances for household
and similar purposes. Safety requirements.
National standards :
-UNI 7824: Monobloc nebulizer burners for liquid fuels. Characteristics
and test methods
4
PART I: INSTALLATION
Burner model identification
Burners are identified by burner type and model. Burner model identification is described as follows.
Type RN520
(1)
Model
N-. PR. S. *.
A.
(2) (3) (4) (5) (6)
(1) BURNER TYPE
RN510 - RN515 - RN520 - RN525
N - Heavy oil, viscosity  50cSt (7° E) @ 50° C
E - Heavy oil, viscosity  110cSt (15°E) @ 50° C
D - Heavy oil, viscosity  400cSt (50° E) @ 50° C
P - Petroleum, viscosity 89cSt (12° E) @ 50° C
(2) FUEL
(3) OPERATION (Available versions)
PR - Progressive
MD - Fully modulating
(4) BLAST TUBE
S - Standard
L - Extended
(5) DESTINATION COUNTRY
* - see data plate
(6) BURNER VERSION
A - Standard
Technical Specifications
BURNER
Output
min - max kW
RN510
RN515
RN520
RN525
1314 - 3953
1628 - 4884
2326 - 6977
2000 - 8000
Heavy oil
Fuel
See “Burner model identification” table
Viscosity
Heavy oil rate
Oil train inlet pressure
min. - max. kg/h
117 - 352
145 - 435
bar
207 - 622
178 - 713
4 max
400V 3N a.c. 50Hz
Power supply
Total power consumption (Heavy oil)
kW
33.1
43
59.7
69.2
Total power consumption (Petroleum)
kW
27.1
31
41.7
--
Fan motor
kW
7.5
11
15
18.5
Pump motor
kW
1.1
1.5
2.2
2.2
Pre-heater resistors (heavy oil)
kW
24
30
42
48
Pre-heater resistors (Petroleum)
kW
18
18
24
--
415
430
IP40
Protection
Approx. weight
kg
320
370
Progressive - Fully modulating
Operation
Operating temperature
°C
-10 ÷ +50
Storage Temperature
°C
-20 ÷ +60
Intermittent
Working service*
Heavy oil net calorific value (Hi): 40.4 MJ/kg (average value).
NOTE ON THE WORKING SERVICE: for safety reasons, one controlled shutdown must take place every 24 hours of continuous working.
5
PRESSURE IN
COMBUSTION CHAMBER (mbar)
Performance Curves
RN510
RN515
24
24
20
20
16
16
12
12
8
8
4
4
0
1000
1800
2600
3400
4200
RN520
PRESSURE IN
COMBUSTION CHAMBER (mbar)
0
1200
2800
3600
4400
5200
kW
RN525
24
24
20
20
16
16
12
12
8
8
4
4
0
1600 2400 3200 4000 4800 5600 6400 7200 8000
0
1500
kW
2000
kW
2500
3500
4500
5500
6500
7500
8500
kW
To get the input in kcal/h, multiply value in kW by 860.
Data are referred to standard conditions: atmospheric pressure at 1013mbar, ambient temperature at 15°C
NOTE: The performance curve is a diagram that represents the burner performance in the type approval phase or in the laboratory
tests, but does not represent the regulation range of the machine. On this diagram the maximum output point is usually reached by adjsuting the combustion head to its “MAX” position (see paragraph “Adjusting the combustion head”); the minimum output point is reached setting the combustion head to its “MIN” position. During the first ignition, the combustion head is set in order to find a
compromise between the burner output and the generator specifications, that is why the minimum output may be different from the Performance curve minimum.
6
Overall dimensions (mm)
P
P
H
N
Boiler recommended boiler drilling
template
M
7
RN510
RN515
RN520
RN525
A(S*)
1502
1502
1502
1502
A(L*)
1682
1682
1682
1682
AA
221
145
145
145
AB
217
217
207
197
AC
246
246
250
275
AD
35
35
35
35
B(S*) B(L*)
350
530
350
530
350
530
350
530
BB
468
508
508
650
C
1152
1152
1152
1152
CC
571
598
598
598
D
1285
1285
1285
1285
DD**
349
x
x
x
*S = measure referred to standard blast tube
*L = measure referred to extended blast tube
** RN515-520-525: as far as these burners, the oil pumping/pre-heating unit is separate.
E
643
643
643
643
EE**
556
x
x
x
F
642
642
642
642
G
345
384
422
434
H
385
424
472
484
K
540
540
540
540
L
496
496
496
496
M
M14
M14
M14
M14
N
552
552
552
552
O
390
390
390
390
P
390
390
390
390
T UU
37 36
37 36
37 36
37 78
W
897
802
802
844
Y
328
328
328
328
Z
270
270
270
270
INSTALLING THE BURNER
Packing
Burners are despatched in wooden crates whose dimensions are:
RN510-515-520: 1720 x 1500 x 1210 (L x P x H)
RN525: 1800 x 1500 x 1300 (L x P x H)
Packing cases of this kind are affected by humidity and are not suitable for stacking. The following are placed in each packing case:





burner;
gasket to be inserted between the burner and the boiler;
oil flexible hoses;
oil filter;
envelope containing this manual.
RN515-520-525: as far as these burners, the oil pumping/pre-heating unit is separate.
To get rid of the burner’s packing, follow the procedures laid down by current laws on disposal of materials.
Handling the burner
ATTENTION! The lhandling operations must be carried out by specialised and trained personnel. If these operations are not carried out correctly, the residual risk for the burner to overturn and fall down still persists.
To move the burner, use means suitable to support its weight (see paragraph “Technical specifications”).
The unpacked burner must be lifted and moved only by means of a fork lift truck.
The burner is mounted on a stirrup provided for handling the burner by means of a fork lift truck: the forks must be inserted into the A
anb B ways. Remove the stirrup only once the burner is installed to the boiler.
A
B
Fitting the burner to the boiler
To install the burner into the boiler, proceed as follows:
1 make a hole on the closing door of the combustion chamber as described on paragraph “Overall dimensions”)
2 place the burner to the boiler: lift it up and handle it according to the procedure described on paragraph “Handling the burner”;
3 place the 4 stud bolts (5) on boiler’s door, according to the burner drilling template described on paragraph “Overall dimensions”;
4 fasten the 4 stud bolts;
5 place the gasket on the burner flange;
6 install the burner into the boiler;
7 fix the burner to the stud bolts, by means of the fixing nuts, according to the next picture.
8 After fitting the burner to the boiler, ensure that the gap between the blast tube and the refractory lining is sealed with appropriate
insulating material (ceramic fibre cord or refractory cement).
Keys
1 Burner
2 Fixing nut
3 Washer
4 Sealing gasket
5 Stud bolt
7 Blast tube
8
MOUNTING POSITION
SIDE UP
SIDE DOWN
Burner is designed to operate with horizontal flame axis. Set the upper side of the burner flange in a horizontal position, in order to
obtain the correct inclination of the pre-heating tank. For different installations, please contact the Technical Department.
.
Key
1 Burner flange (upper side indicated)
1
2 Bracket
3 Pre-heating tank on the burner
2
3
9
Electrical connections
Respect the basic safety rules. Make sure of the connection to the earthing system. do not reverse the phase and neutral
connections. Fit a differential thermal magnet switch adequate for connection to the mains.
ATTENTION: before executing the electrical connections, pay attention to turn the plant’s switch to OFF and be sure that the
burner’s main switch is in 0 position (OFF) too. Read carefully the chapter “WARNINGS”, and the “Electrical connections”
section.
WARNING: The burner is provided with an electrical bridge between terminals 6 and 7; when connecting the high/
low flame thermostat, remove this bridge before connecting the thermostat.
IMPORTANT: Connecting electrical supply wires to the burner teminal block MA, be sure that the ground wire is
longer than phase and neutral ones.
auxiliary contacts are provided (terminals no. 507 and no. 508 of the MA terminal block) to connect an intervention system
(alarm/power supply cutoff) in case of fault of the oil resistor contactor (see Fig. 1-Fig. 2).
To execute the electrical connections, proceed as follows:
1 remove the cover from the electrical board, unscrewing the fixing screws;
2
execute the electrical connections to the supply terminal board as shown in the following diagrams,
3
check the direction of the motor (see next pargraph)
4 refit the panel cover
Probes connection
MA
Fig. 1 - Progressive burners
MA
Fig. 2 - Fully modulating burners
Fig. 3
(#) Free contact for ”Faulty heater resistor contactor”
Probes connection oby means of the 7-pins plug (Fig. 4) - see Fig. 3) for
connections.
Fig. 4
RN515-520-525: As for the connection of the pump-preheating unit, see wiring diagrams.
10
Fan and pump motors direction
Once the electrical connection of the burner is performed, remember to check the rotation of the motor. The motor should rotate in an
counterclockwise direction looking at cooling fan. In the event of incorrect rotation reverse the three-phase supply and check again the
rotation of the motor.
Connecting the oil heating resistors
2.4 - 4.5 kW
8 - 12 kW
400 V
R1
R1
L1
R2
L2
L1
230V
R1
L1
R1
L2
L1
400 V
230V
R6
L2
R2
R6
R2
L2
R2
R3
R3
R5
R5
R3
R3
R4
R4
L3
L3
L3
L3
Fig. 5
Fig. 6
18 - 24 kW
ELECTRIC MOTOR CONNECTION
400 V
230V
400 V
230V
W2
U2
V2
U1
V1
W1
W2
U2
V2
L1
L1
R1
R6
R1
R2
R5
L2
R3
R2
R6
L2
U1
R3
R5
V1
W1
R4
L3
L3
R4
L1
L2
L3
L1
L2
L3
Fig. 8
Fig. 7
Double-pipe and single-pipe system
The pumps that are used can be installed both into single-pipe and double-pipe systems.
Single-pipe system: a single pipe drives the oil from the tank to the pump’s inlet. Then, from the pump, the pressurised oil is driven to
the nozzle: a part comes out from the nozzle while the othe part goes back to the pump. In this system, the by-pass pulg, if provided,
must be removed and the optional return port, on the pump’s body, must be sealed by steel plug and washer.
Double-pipe system: as for the single pipe system, a pipe that connects the tank to the pump’s inlet is used besides another pipe that
connects the pum’s return port to the tank, as well. The excess of oil goes back to the tank: this installation can be considered self-bleeding. If provided, the inside by-pass plug must be installed to avoid air and fuel passing through the pump.
Burners come out from the factory provided for double-stage systems. They can be suited for single-pipe system (recommended in the
case of gravity feed) as decribed before.To change from a 1-pipe system to a 2-pipe-system, insert the by-pass plug G (as for ccw-rotation- referring to the pump shaft).
Caution: Changing the direction of rotation, all connections on top and side are reversed.
Suntec TA
G
Bleed
Bleeding in two-pipe operation is automatic : it is assured by a bleed flat on the piston. In one-pipe operation, the plug of a pressure
gauge port must be loosened until the air is evacuated from the system.
11
Oil pumps
RN510: SUNTEC TA3
RN515: SUNTEC TA4
RN520 - RN525: SUNTEC TA5
Suntec TA..
Oil viscosity
Oil temperature
3 ÷ 75 cSt
0 ÷ 150°C
Min. suction pressure
Max. suction pressure
Max. return pressure
Rotation speed
- 0.45 bar to avoid gasing
5 bar
5 bar
3600 rpm max.
1
2
3
4
5
6
Inlet G1/2
To the nozzle G1/2
Return G1/2
Pressure gauge port G1/4
Vacuum gauge port G1/4
Pressure governor
About the use of fuel pumps








Make sure that the by-pass plug is not used in a single pipe installation, because the fuel unit will not function properly and damage
to the pump and burner motor could result.
Do not use fuel with additives to avoid the possible formation over time of compounds which may deposit between the gear teeth,
thus obstructing them.
After filling the tank, wait before starting the burner. This will give any suspended impurities time to deposit on the bottom of the
tank, thus avoiding the possibility that they might be sucked into the pump.
On initial commissioning a "dry" operation is foreseen for a considerable length of time (for example, when there is a long suction
line to bleed). To avoid damages inject some lubrication oil into the vacuum inlet.
Care must be taken when installing the pump not to force the pump shaft along its axis or laterally to avoid excessive wear on the
joint, noise and overloading the gears.
Pipes should not contain air pockets. Rapid attachment joint should therefore be avoided and threaded or mechanical seal junctions preferred. Junction threads, elbow joints and couplings should be sealed with removable sg component. The number of junctions should be kept to a minimum as they are a possible source of leakage.
Do not use PTFE tape on the suction and return line pipes to avoid the possibility that particles enter circulation. These could deposit on the pump filter or the nozzle, reducing efficiency. Always use O-Rings or mechanical seal (copper or aluminium gaskets) junctions if possible.
An external filter should always be installed in the suction line upstream of the fuel unit.
12
Burners with separate pre-heating/pumping unit
Follow the scheme in the picture below to connect the burner to the oil pumping unit. The pump sends the oil coming from the tank to the burner. The pressure governor makes the oil reach the
nozzle at the required pressure, while the excess of oil goes back to the tank. To change the delivery pressure act on the adjusting screw of the delivery pressure governor.
to the burner
from burner to oil
governor
air discharge valve
from oil governor
to degassing bottle
from oil governor
13
discharge cap
inlet
inlet
from pump
Connecting the oil flexible hoses
To connect the flexible light oil hoses to the pump, proceed as follows, according to the pump provided:
1 remove the closing nuts on the inlet (A) and return (R) connections of the pump;
2 screw the rotating nut of the two flexible hoses on the pump being careful to avoid exchanging the inlet and return lines: see
the arrows marked on the pump that show the inlet and the return (see prevoius paragraph).
Suntec TA..
R
A
Connections to the oil gun
Gun with the oil nozzle inside
5
4
1 Inlet
2 Return
3 Gun opening
4 Heating wire (only for high
density oil burners)
5 Cartdrige-type heater
(only for oil with viscosity
> 110 cSt)
3
2
1
Oil manifold
5
1
2
3
Recommendations to design heavy oil feeding plants
This paragraph is intended to give some suggestions to make feeding plants for heavy oil burners. To get a regular burner operation, it
is very important to design the supplying system properly. Here some suggestions will be mentioned to give a brief description.
The term “heavy oil” is generic and summarises several chemical-physical properties, above all viscosity. The excessive viscosity
makes the oil impossible to be pumped, so it must be heated to let it flow in the pipeline; because of the low-boiling hydrocarbons and
dissolved gases, the oil must be also pressurised. The pressurisation is also necessary to feed the burner pump avoiding its cavitation
because of the high suction at the inlet. The supplying system scope is to pump and heat oil.
The oil viscosity is referred in various unit measures; the most common are: °E, cSt, Saybolt and Redwood scales. Table 3 shows thevarious unit convertions (e.g.: 132 cSt viscosity corresponds to 17.5°E viscosity).
The diagram in shows how the heavy oil viscosity changes according to its temperature.
Example: an oil with 22°E viscosity at 50°C once heated to 100°C gets a 3 °E viscosity.
As far as the pumping capability, it depends on the type of the pump that pushes the oil even if on diagram in a generic limit is quoted
at about 100 °E, so it is recommended to refer to the specifications of the pump provided.
Usually the oil minimum temperature at the oil pump inlet increases as viscosity does, in order to make the oil easy to pump. Referring
to the diagram on Fig. 10, it is possible to realise that to pump an oil with 50°E viscosity at 50°C, it must be heated at about 80°C.
14
Pipe heating system
Pipe heating system must be provided, that is a system to heat pipes and plant components to mantain the viscosity in the pumping limits. Higher the oil viscosity and lower the ambient temperature, more necessary the pipe heating system.
Inlet minimum pressure of the pump (both for supplying system and burner)
A very low pressure leads to cavitation (signalled by its peculiar noise): the pump manifacturer declares the minimum value. Therefore,
check the pump technical sheets.
By increasing the oil temperature, also the minimum inlet pressure at the pump must increase, to avoid the gassification of the oil lowboiling products and the cavitation. The cavitation compromises the burner operation, it causes the pump to break too. The diagram on
Fig. 11 roughly shows the inlet pump pressure according to the oil temperature.
Pump operating maximum pressure (both for the supplying system and burner)
Remember that pumps and all the system components through which the oil circulates, feature an upper limit. Always read the technical documentation for each component. Schemes on Fig. 13 and Fig. 14 are taken from UNI 9248 "liquid fuel feeding lines from tank to
burner" standard and show how a feeding line should be designed. For other countries, see related laws in force. The pipe dimensioning, the execution and the winding dimensioning and other construcitve details must be provided by the installer.
Adjusting the supplying oil ring
According to the heavy oil viscosity used, in the table below indicative temperature and pressure values to be set are shown.
Note: the temperature and pressure range allowed by the supplying ring components must be checked in the specifications table of the
components themselves.
PIPELINE
PRESSURE
bar
1- 2
1- 2
1- 2
HEAVY OIL VISCOSITY AT 50 °C
cSt (°E)
> 50 (7)
> 110 (15)
< 50 (7)
< 110 (15)
< 400 (50)
PIPELINE
TEMPERATURE
°C
20
50
65
Tab. 1
Burner adjustments
The table below shows indicative values of temperature and pressure to be set on the burner devices, according to the viscosity of the
heavy oil used. The oil temperature should be set on TR resistor thermostat in order to get about 1.5°E viscosity at the nozzle.*
OIL PRESSURE
OIL PRESSURE
AFTER
AFTER OIL
VISCOSITY
BURNER PUMP
METERING VALVE
AT 50 °C
(N. 24 in 3ID0023/14) (N. 33 IN 3ID0023/14)
min
max
min
max
cSt (°E)
bar
bar
< 50 (7)
5
8
0.5
2
> 50 (7)
< 110 (15)
5
8
0.5
2
> 110 (15) < 400 (50)
5
8
0.5
2
TEMPERATURE OF
THE PRE-HEATING
RESISTORS
THERMOSTAT TR
min
max
°C
70
95
75
105
100
140
Tab. 2
15
TEMPERATURE OF
THE RESISTORS
SAFETY
THERMOSTAT TRS
TEMPERATURE OF
THE PLANT
ENABLING
THERMOSTAT TCI
°C
190
190
190
°C
50
60
70
Viscosity units conversion table
Cinematics
viscosity
Centistokes (cSt)
Engler Degrees
(°E)
Saybolt
Seconds
Universal
(SSU)
Saybolt
Seconds
Furol (SSF)
Redwood
Seconds no.1
(Standard)
Redwood Seconds
no..2 (Admiralty)
1
1
31
--
29
--
2.56
1.16
35
--
32.1
--
4.3
1.31
40
--
36.2
5.1
7.4
1.58
50
--
44.3
5.83
10.3
1.88
60
--
52.3
6.77
13.1
2.17
70
12.95
60.9
7.6
15.7
2.45
80
13.7
69.2
8.44
18.2
2.73
90
14.44
77.6
9.3
20.6
3.02
100
15.24
85.6
10.12
32.1
4.48
150
19.3
128
14.48
43.2
5.92
200
23.5
170
18.9
54
7.35
250
28
212
23.45
65
8.79
300
32.5
254
28
87.6
11.7
400
41.9
338
37.1
110
14.6
500
51.6
423
46.2
132
17.5
600
61.4
508
55.4
154
20.45
700
71.1
592
64.6
176
23.35
800
81
677
73.8
198
26.3
900
91
762
83
220
29.2
1000
100.7
896
92.1
330
43.8
1500
150
1270
138.2
440
58.4
2000
200
1690
184.2
550
73
2500
250
2120
230
660
87.6
3000
300
2540
276
880
117
4000
400
3380
368
1100
146
5000
500
4230
461
1320
175
6000
600
5080
553
1540
204.5
7000
700
5920
645
1760
233.5
8000
800
6770
737
1980
263
9000
900
7620
829
2200
292
10000
1000
8460
921
3300
438
15000
1500
13700
--
4400
584
20000
2000
18400
--
Tab. 3
16
VISCOSITY vs TEMPERATURE DIAGRAM FOR COMBUSTIBLE OILS
1000
PUMPING LIMIT
VISCOSITY (°E)
100
10
1
-10
0
10
20
30
40
50
60
70
80
90
100
110
120
130
140
150
160
TEMPERATURE (°C)
LIGHT OIL 1,3°E AT 20°C
HEAVY OIL 2,4°E AT 50°C
HEAVY OIL 4°E AT 50°C
HEAVY OIL 7,5°E AT 50°C
HEAVY OIL 10°E AT 50°C
HEAVY OIL 13°E AT 50°C
HEAVY OIL 22°E AT 50°C
HEAVY OIL 50°C
HEAVY OIL 47°E AT 50°C
HEAVY OIL 70°E AT 50°C
HEAVY OIL 200°E AT 50°C
Fig. 9
17
Indicative diagram showing the oil temperature at burner pump inlet vs. oil viscosity
Example: if the oil has a 400cSt (50°E) @ 50°C viscosity, the oil temperature at the pump inlet should be 80°C (see diagram).
OIL TEMPERATURE FOR PUMP FEEDING
VISCOSITY (°E a 50°C)
100
10
1
0
10
20
30
40
50
60
70
80
90
TEMPERATURE (°C)
Fig. 10
Indicative diagram showing the oil pressure according to its temperature
PUMP FEEDING PRESSURE
6
Max. for T and
TA pumps
PRESSURE (bar)
5
Max. for E ..1069
pimps
4
3
2
1
0
40
60
80
100
120
140
160
TEMPERATURE (°C)
Fig. 11
Indicative diagram showing the oil atomising temperature according to its viscosity
Example: if the oil has a 50°E @ 50°C viscosity, the oil atomising temperature should be between 145°C and 160°C (see diagram).
VISCOSITY vs. TEMPERATURE DIAGRAM
2
VISCOSITY (°E)
1.9
1.8
1.7
1.6
BEST VISCOSITY RANGE FOR A
PROPER ATOMIZATION
1.5
1.4
1.3
1.2
50
60
70
3°E AT 50°C
5°E AT 50°C
7°E AT 50°C
12°E AT 50°C
15°E AT 50°C
20°E AT 50°C
50°E AT 50°C
80
90
100
110
120
130
140
150
160
170
180
TEMPERATURE (°C)
Fig. 12
18
HYDRAULIC DIAGRAMS
Fig. 13 - Hydraulic diagram 3ID0023 - Single burner configuration
19
Fig. 14 - Hydraulic diagram 3ID0014 - Two or more burners configuration
20
Hydraulic Diagram 3ID0014
Hydraulic Diagram 3ID0023
1 Main tank
1 Main tank
2 Bottom valve
2 Bottom valve
3 Main tank pre-heating pipe
3 Main tank pre-heating pipe
4 Oil filter (filtration, 1mm)
4 Oil filter
5 Circuit pressure regulator
5 Circuit pressure regulator
6 Manometer
6 Manometer
7 Pressure regulation by-pass valve
7 Pressure regulation by-pass valve
8 Manual valve
8 Manual valve
9 Oil pump
9 Oil pump
10 Pump pressure regulator
10 Pump pressure regulator
11 Unidirectional valve
11 Unidirectional valve
12 Service tank pre-heating resistor
12 Service tank pre-heating resistor
13 Service tank pre-heating thermostat
13 Service tank pre-heating thermostat
14 Burner consent thermostat
14 Burner consent thermostat
15 Thermometer
15 Thermometer
16 Consent pressure switch for service tank resistor
16 Consent pressure switch for service tank resistor
17 Service tank heating pipe
17 Service tank heating pipe
18 Service tank air drain valve
18 Service tank air drain valve
19 Service tank
19 Service tank
20 Oil filter
20 Oil filter
21 Fuel solenoid valve
21 Fuel solenoid valve
22 Fuel valve
22 Fuel valve
23 Burner pump flexible hoses
23 Burner pump flexible hoses
24 Burner oil pump
24 Burner oil pump
25 Pre-heating tank resistor
25 Pre-heating tank resistor
26 Pre heating tank
26 Pre heating tank
27 Oil consent thermostat
27 Oil consent thermostat
28 Heather safety thermostat
28 Pre-heating tank resistors safety thermostat
29 Thermostat for oil temperature setting
29 Thermostat for oil temperature setting
30 Tank filter
30 Pre-heating tank filter
31 Thermometer
31 Thermometer
32 Check valve
32 Check valve
33 Oil pressure governor
33 Oil pressure governor
35 Oil needle drive piston
35 Oil needle drive piston
36 Oil rate regulator
36 Three way valve for piston drive
37 Burner consent thermostat
37 Burner consent thermostat
42 Burner start consent thermostat
42 Air separation bottle
43 Burner
43 Burner
45 Thermostat for pipes pre-heating pumps
45 Thermostat for pipes pre-heating pumps
46 Water pump for service tank pre-heating (1)
46 Water pump for service tank pre-heating (1)
47 Water pump for main tank pre-heating (19)
47 Water pump for main tank pre-heating (19)
48 Water pre-heating balance setting valve
48 Valves for setting of pre-heating water balance
50 Oil circulation pump
52 Oil ring max. pressure switch
52 Oil ring max. pressure switch
21
Regolazione della portata dell’olio combustibileAdjusting light oil flow rate
The light oil flow rate can be adjusted choosing a by-pass nozzle that suits the boiler/utilisation output and setting the delivery and
return pressure values according to the ones quoted on the chart below and the diagram on Fig. 15 (as far as reading the pressure
values, see next paragraphs).
NOZZLE
DELIVERY
PRESSURE
bar
RETURN
PRESSURE MAX.
bar
RETURN
PRESSURE MIN.
bar
FLUIDICS WR2/UNIGAS M3
25
19 - 20
7 - 9 (indicative values)
Fig. 15
FLOW RATE kg/h
DIMENSIONS
Min
Max
40
13
40
50
16
50
60
20
60
70
23
70
80
26
80
90
30
90
100
33
100
115
38
115
130
43
130
145
48
145
160
53
160
180
59
180
200
66
200
225
74
225
250
82
250
275
91
275
300
99
300
330
109
330
360
119
360
400
132
400
450
148
450
500
165
500
550
181
550
600
198
600
650
214
650
700
231
700
750
250
750
800
267
800
Tab. 4
Pressure
at
nozzle
Pressure
at
nozzle
Atomisation angle
Pressure on return
Pressure on return
Up to 100kg/
Over 100kg/
% Flow rate
---------------Atomisation angle according to the return pressure
_________ % Flow rate
Example: as for over 100kg/h nozzles, the 80% of the nozzle flow rate can be obtained with a return pressure at about 18bar (see Fig.
15).
22
Oil thermostat adjustment
To find the thermostats, remove the cover of the burner switchboard. Adjust them using a screwdriver on the VR screw as shown in the
next picture.
TCN - Oil enabling thermostat (Fig. 16)
Adjust this thermostat to a value 10% lower than that showed
in the viscosity-temperature diagram (Fig. 12).
TRS - Resistor safety thermostat (Fig. 16)
The thermostat is set during factory testing at about 190° C.
This thermostat trips when the operating temperature exceeds
the set limit. Ascertain the cause of the malfunction and reset
the thermostat by means of the PR button.
PR
VR
VR
TR - Resistor thermostat (Fig. 16)
Adjust this thermostat to the correct value according to the
viscosity-temperature diagram (Fig. 12) and check the temperature by using a thermometer mounted on the pre-heating
tank.
VR
Fig. 16
TCI (when provided) - Installation enabling thermostat
(Fig. 16)
This thermostat is fitted on burners fired with oil at a viscosity
of 400cSt (50°E) at 50° C only. Set the thermostat according
to data on page 14.
Petroleum burners:
TCI -Installation enabling thermostat
Set this thermostat to about 40° C.
TCN - Oil enabling thermostat
Adjust this thermostat to a value between 45 and 50°C. Anyway, set TCN to a value possibly lower than the one set for TR (see below).
TR - Resistor thermostat
Adjust this thermostat to a value between 45 and 50°C. Check the temperature by using a thermometer mounted on the pre-heating
tank.
TRS - Resistor safety thermostat
The thermostat is set during factory testing at about 190° C.
This thermostat trips when the operating temperature exceeds the set limit. Ascertain the cause of the malfunction and reset the thermostat by means of the PR button (see picture).
CAUTION: even if the adjusting ranges for the TR (Resistor thermostat) and TCN (Oil enabling thermostat) are the same, set TCN to a
value lower than the one set for TR.
23
ADJUSTING AIR AND FUEL RATE
ATTENTION: before starting the burner up, be sure that the manual cutoff valves are open. Be sure that the mains switch is
closed.
.ATTENTION: During commissioning operations, do not let the burner operate with insufficient air flow (danger of formation
of carbon monoxide); if this should happen, make the fuel decrease slowly until the normal combustion values are achieved.
Before starting up the burner, make sure that the return pipe to the tank is not obstructed. Any obstruction would cause the
pump seal to break.
IMPORTANT! the combustion air excess must be adjusted according to the values in the following chart.
Recommended combustion parameters
Fuel
Recommended (%) CO2
Recommended (%) O2
Heavy oil  50cSt (7° E) @ 50° C
11 ÷ 12
4.2 ÷ 6.2
Heavy oil  50cSt (7° E) @ 50° C
11 ÷ 12.5
4.7 ÷ 6.7
Adjustments - brief description
Adjust the air and oil flow rates at the maximum output (“high flame”) first, by means of the air damper and the adjusting cam
respectively.
 Check that the combustion parameters are in the suggested limits.
 Then, adjust the combustion values corresponding to the points between maximum and minimum: set the shape of the adjusting
cam foil. The adjusting cam sets the air/fuel ratio in those points, regulating the opening-closing of the fuel governor.
 Now set the low flame output, acting on the low flame microswitch of the actuator in order to avoid the low flame output increasing
too much or the flues temperature getting too low to cause condensation in the chimney.
Now, adjust the burner according to the actuator model provided.

Oil Flow Rate Settings by means of Berger STM30../Siemens SQM40.. actuator
1
Check the fan motor rotation.
2
Prime the oil pump acting on the related contactor (CP - see next picture): check the pump motor rotation (see “Fan and pump
motors direction” on page 11) and keep pressing for some seconds until the oil circuit is charged;
CP
3
bleed the air from the M pressure gauge port (Fig. 17) by loosing the cap without removing it, then release the solenoid starter.
Suntec TA..
M
VR
4
5
Fig. 17
Before starting the burner up, drive the high flame actuator microswitch matching the low flame one (in order to let the burner operates at the lowest output) to safely achieve the high flame stage.
Turn the burner on by means of its main switch A (see next picture): if the burner locks (LED B on in the control panel) press the
RESET button (C) on the control panel - see chapter “OPERATION”.
24
B
C
A
6
7
8
Start the burner up by means of the thermostat series and wait unitl the pre-purge phase comes to end and that burner starts up;
drive the burner to high flame stage, by means fo the thermostat TAB (high/low flame thermostat - see Wiring diagrams), as far as
fully-modulating burners, see related paragraph.
Then move progressively the microswitch to higher values until it reaches the high flame position; always check the combustion
values (see next steps).
mensions
Dimensions in
VI
SQM4...
V
IV
III
II
Actuator cams
I
II
III
I
High flame
Stand-by and Ignition
Low flame
MAN-AUTO
MAN-AUTO
Berger STM30
Siemens SQM40
9
the nozzle supply pressure is already factory-set and must not be changed. Only if necessary, adjust the supply pressure as follows (see related paragraph); insert a pressure gauge into the port shown on Fig. 18 and act on on the pump adjusting screw VR
(see Fig. 17) as to get the nozzle pressure at 25bar (see diagram on page 22).
Pressure gauge port
PG
RP
V
SV
Fig. 18
Fig. 20
10 in order to get the maximum oil flow rate, adjust the pressure (reading its value on the PG pressure gauge): checking always the combustion parameters, the adjustment is to be performed by means of the SV adjusting cam screw V (see picture) when the cam has reached
the high flame position.
11 To adjust the air flow rate in the high flame stage, loose the RA nut and screw VRA as to get the desired air flow rate: moving
the rod TR towards the air damper shaft, the air damper opens and consequently the air flow rate increases, moving it far from the
25
shaft the air damper closes and the air flow rate decreases.
Note: once the procedure is perfomed, be sure that the blocking nut RA is fasten. Do not change the position of the air damper rods.
TR
VRA
RA
12 If necessary, change the combusiton head position: to let the burner operate at a lower output, loose the VB screw and move progressively back the combustion head towards the MIN position, by turning clockwise the VRT ring nut. Fasten VB screw when the
adjustment is accomplished.
VB
”MIN” position
VRT
”MAX” position
Attention! if it is necessary to change the head position, repeat the air and gas adjustments described above.
13 as for the point-to-point regulation in order to set the cam foil shape, move the low flame microswitch (cam III) a little lower than the
maximum position (90°);
14 set the TAB thermostat to the minimum in order that the actuator moves progressively towards the low flame position (as for fullymodulating burners, refer to the related paragraph);
15 move cam III towards the minimum to make the actuator move towards the low flame until the two bearings find the adjusting screw
that refers to a lower position: screw V to increase the rate, unscrew to decrease, in order to get the pressure as showed on diagram on Fig. 15, according to the requested rate.
ID
RP
SC
V
SV
16 Move again cam III towards the minimum to meet the next screw on the adjusting cam and repeat the previous step; go on this way
as to reach the desired low flame point.
17 The low flame position must never match the ignition position that is why cam III must be set 20°- 30° more than the ignition position.
18 Turn the burner off; then start it up again. If the adjustment is not correct, repeat the previous steps.
26
Adjustment by the Siemens SQL33.. actuator
1
2
Check the fan motor rotation.
Prime the oil pump acting on the related contactor (CP - see next picture): check the pump motor rotation (see “Fan and pump
motors direction” on page 11) and keep pressing for some seconds until the oil circuit is charged;
CP
3
bleed the air from the M pressure gauge port (Fig. 21) by loosing the cap without removing it, then release the contactor.
Suntec TA..
M
VR
Fig. 21
4
5
Before starting the burner up, drive the high flame actuator microswitch matching the low flame one (in order to let the burner operates at the lowest output) to safely achieve the high flame stage.
Turn the burner on by means of its main switch A (see next picture): if the burner locks (LED B on in the control panel) press the
RESET button (C) - see chapter “OPERATION”.
B
C
A
6
7
Start the burner up by means of the thermostat series and wait until the pre-purge phase comes to end and that burner starts up;
the burner starts up with the actuator on the ignition position, set it to the MAN (manual mode), by the MAN/AUTO selector (ignition
position= read on the air damper index ID);
SQL330.. actuator cams
AUTO
F = plastic clamp
A = cam locking lever
S = cam locking lever
BF = Low flame cam
BF
MAN
F
A
S
8
disconnect the TAB thermostat removing the wire from the terminal no. 6 or by setting MAN on the RWF40 modulator or by setting
0 by means of the CMF switch (only for fully-modulating burners);
9 set the actuator to the manual mode (MAN) by means of the MAN/AUTO switch (see next pictures).
10 manually drive the adjusting cam SV to the high flame position and set the actuator to the AUTO mode (by means of the related
switch - see picture) to lock the adjusting cam.
11 The nozzle supply pressure is already factory-set and must not be changed. Only if necessary, adjust the supply pressure as follows (see related paragraph);insert a pressure gauge into the port shown on Fig. 22 and act on on the pump adjusting screw VR
(see Fig. 21) as to get the nozzle pressure at 25bar (Fluidics nozzles - see diagramd on pag. 22).
27
Pressure gauge port
PG
RP
V
SV
Fig. 22
Fig. 23
12 in order to get the maximum oil flow rate, adjust the pressure (reading its value on the PG pressure gauge): always checking the
combustion parameters, the adjustment is to be performed by means of the SV adjusting cam screw V (see picture) when the cam
has reached the high flame position.
13 To adjust the air flow rate in the high flame stage, loose the RA nut and screw VRA as to get the desired air flow rate: moving
the rod TR towards the air damper shaft, the air damper opens and consequently the air flow rate increases, moving it far from the
shaft the air damper closes and the air flow rate decreases.
Note: once the procedure is perfomed, be sure that the blocking nut RA is fasten. Do not change the position of the air damper rods.
TR
VRA
RA
14 If necessary, change the combusiton head position: to let the burner operate at a lower output, loose the VB screw and move progressively back the combustion head towards the MIN position, by turning clockwise the VRT ring nut. Fasten VB screw when the
adjustment is accomplished.
VB
”MIN” position
VRT
”MAX” position
Attention! if it is necessary to change the head position, repeat the air and gas adjustments described above.
15 once the air and oil flow rate have been adjusted at the maximum output, go on with the point to point adjustment on the SV adjusting cam as to reach the minimum output point: gradually move the adjusting cam in order to adjust each of the V screws as to
describe the cam foil shape.
16 to change the SV position set the actuator on the manual mode (MAN), turn the adjusting cam SV and set again the actuator to the
AUTO mode to lock the adjusting cam;
17 act on the V screw that mathces the bearings referring to the adjusting cam position;
18 to adjust the next screw, set again the actuator mode to MAN, turn the adjusting cam and set the actuator to AUTO mode to lock
the adjusting cam on the next screw; adjust it and go on this way to adjust all the screws in order to set the cam foil shape, accor28
19
20
21
22
ding to the combustion values read.
Once the cam foil shape is defined, reconnect the TAB thermostat by reconnecting the wire to the terminal no.6 or setting the
RWF40 burner modulator to AUTO or the CMF switch to 3 (only for fully-modulating burner).
Turn the burner off then start it up again.
Once the pre-purge time comes to end and the burner is on, drive the burner to the high flame stage by the TAB thermostat: check
the combustion values;
drive the burner to low flame, if necessary adjust the low flame size (output) by inserting a screwdriver on the slot F to move the BF
cam.
BF
FA
23 The low flame position must never match the ignition position that is why cam BF must be set 20°- 30° more than the ignition position.
24 Turn the burner off; then start it up again. If the adjustment is not correct, repeat the previous steps.
Calibration of air pressure switch
To calibrate the air pressure switch, proceed as follows:
 Remove the transparent plastic cap.
VR
 Once air and heavy oil setting have been accomplished, startup the burner.
 During the pre-purge phase o the operation, turn slowly the adjusting ring nut VR in the
clockwise direction until the burner lockout, then read the value on the pressure switch
scale and set it to a value reduced by 15%.
 Repeat the ignition cycle of the burner and check it runs properly.
 Refit the transparent plastic cover on the pressure switch.
Fully-modulating burners
To adjust the fully-modulating burners, use the CMF switch on the burner control panel (see next picture), instead of the TAB thermostat as described on the previous paragraphs about the progressive burners. Go on adjusting the burner as described before, paying
attention to use the CMF switch intead of TAB.
The CMF position sets the oprating stages: to drive the burner to the high-flame stage, set CMF=1; to drive it to the low-flame stage, set
CMF=2.
To move the adjusting cam set CMF=1 or 2 and then CMF=0.
CMF = 0
CMF = 1
CMF = 2
CMF = 3
CMF
29
stop at the current position
high flame operation
low flame operation
automatic operation
Oil circuit
The fuel is pushed into the pump 1 to the nozzle 3 at the delivery pressure set by the pressure governor. The solenoid valve 2 stops the
fuel immission into the combustion chamber. The fuel flow rate that is not burnt goes back to the tank through the return circuit. The
spill-back nozzle is feeded at constant pressure, while the return line pressure is adjusted by means of the pressure governor controlled
by an actuator coupled to an adjusting cam. The fuel amount to be burnt is adjusted by means of the burner actuator according to the
adjustments set (see prevoius paragraph).
3
5
6
Fig. 24 - Stand-by
2
4
1
3
5
6
Fig. 25 - Prepurge
2
4
1
3
5
6
Fig. 26 - Low flame
2
4
1
3
Fig. 27 - High flame
5
Key
1 Oil pump
2 Oil solenoid valve
3 Nozzle
4 Adjusting cam
5 Pressure gauge
6 Pressure governor
6
2
1
4
30
PART II: OPERATION
LIMITATIONS OF USE
THE BURNER IS AN APPLIANCE DESIGNED AND CONSTRUCTED TO OPERATE ONLY AFTER BEING CORRECTLY CONNECTED TO A HEAT GENERATOR (E.G. BOILER, HOT AIR GENERATOR, FURNACE, ETC.), ANY OTHER USE IS TO BE CONSIDERED IMPROPER AND THEREFORE DANGEROUS.
THE USER MUST GUARANTEE THE CORRECT FITTING OF THE APPLIANCE, ENTRUSTING THE INSTALLATION OF IT TO
QUALIFIED PERSONNEL AND HAVING THE FIRST COMMISSIONING OF IT CARRIED OUT BY A SERVICE CENTRE AUTHORISED BY THE COMPANY MANUFACTURING THE BURNER.
A FUNDAMENTAL FACTOR IN THIS RESPECT IS THE ELECTRICAL CONNECTION TO THE GENERATOR’S CONTROL AND
SAFETY UNITS (CONTROL THERMOSTAT, SAFETY, ETC.) WHICH GUARANTEES CORRECT AND SAFE FUNCTIONING OF
THE BURNER.
THEREFORE, ANY OPERATION OF THE APPLIANCE MUST BE PREVENTED WHICH DEPARTS FROM THE INSTALLATION
OPERATIONS OR WHICH HAPPENS AFTER TOTAL OR PARTIAL TAMPERING WITH THESE (E.G. DISCONNECTION, EVEN
PARTIAL, OF THE ELECTRICAL LEADS, OPENING THE GENERATOR DOOR, DISMANTLING OF PART OF THE BURNER).
NEVER OPEN OR DISMANTLE ANY COMPONENT OF THE MACHINE.
OPERATE ONLY THE MAIN SWITCH, WHICH THROUGH ITS EASY ACCESSIBILITY AND RAPIDITY OF OPERATION ALSO
FUNCTIONS AS AN EMERGENCY SWITCH, AND ON THE RESET BUTTON.
IN CASE OF A BURNER SHUT-DOWN, RESET THE CONTROL BOX BY MEANS OF THE RESET PUSHBUTTON. IF A SECOND
SHUT-DOWN TAKES PLACE, CALL THE TECHNICAL SERVICE, WITHOUT TRYING TO RESET FURTHER.
WARNING: DURING NORMAL OPERATION THE PARTS OF THE BURNER NEAREST TO THE GENERATOR (COUPLING
FLANGE) CAN BECOME VERY HOT, AVOID TOUCHING THEM SO AS NOT TO GET BURNT.
31
OPERATION
ATTENTION: before starting the burner up, be sure that the manual cutoff valves are open and check that the pressure upstream the gas train complies the value quoted on paragraph “Technical specifications”.
N.B. be sure the cutoff valves on the delivery and return pipes are OPEN.
 Turn the burner on by means of its main switch A (see next pictures).
 Check that the burner is not locked (LED E lights up); if so, reset it by pressing the reset button N.
 Check that the series of thermostats (or pressure switches) enable the burner to start up.
 At the beginning of the start-up cycle the servo control drives the air damper to the maximum opening, the fan motor starts and the
pre-purge phase begins. During the pre-purge phase the complete opening of the air damper is signalled by the indicator light F on
the front panel.
 At the end of the pre-purge the ignition transformer is energised (signalled by the indicator light C on the panel). Two seconds later,
the oil valve opens and the ignition transformer is de-energized (light C off).
The burner is now into operation, the servocontrol begins the opening, after few seconds the burner goes to two stages operation and
eventually switches to the high flame operation, depending on the needs of the plant (light A, on) or continues with low flame operation
(light B, on).
As far as fully-modulating burners, see the Siemens RWF40 burner modulator manual.
32
Control panel
RN510
A
B
C
CMF
E
F
B
A
C
D
E
F
IRA
L
N
P
Q
R
T
D
L
Q
P
R
N
T
RN515 - RN520 - RN525
E
A
B
F
C
D
L
P
P
Q
Q
R
N
T
33
High flame lamp
Low flame lamp
Ignition transformer operation
Manual operation switch
0= Off
1= High flame
2= Low flame
3= Automatic
Fan motor thermal cutout intervention
Burner lockout
Burner in stand-by
Auxiliary resistors wsitch
Heavy oil solenoid lamp operation
Contrlol box reset pushbutton
Heating resistors safety thermostat
Pre-heating tank
Modulator
Main switch
PART III: MAINTENANCE
At least once a year carry out the maintenance operations listed below. In the case of seasonal servicing, it is recommended to carry
out the maintenance at the end of each heating season; in the case of continuous operation the maintenance is carried out every 6
months.
WARNING: ALL OPERATIONS ON THE BURNER MUST BE CARRIED OUT WITH THE MAINS DISCONNECTED AND
THE FUEL MANAUL CUTOFF VALVES CLOSED!
ATTENTION: READ CAREFULLY THE “WARNINGS” CHAPTER AT THE BEGINNIG OF THIS MANUAL..
ROUTINE MAINTENANCE
Clean and examine the oil filter cartridge and replace it if necessary.
Examine the condition of the oil flexible tubing and check for possible leaks.
 Check and clean if necessary the oil heaters and the tank, according to the fuel type and its use; remove the heaters flange fixing
nuts and remove the heaters from the tank: clean by using steam or solvents and not metallic things.
 Clean and examine the filter inside the oil pump. Filter must be thoroughly cleaned at least once in a season to ensure correct working of the fuel unit. To remove the filter, unscrew the four screws on the cover. When reassemble, make sure that the filter is
mounted with the feet toward the pump body. If the gasket between cover and pump housing should be damaged, it must be replaced. An external filter should always be installed in the suction line upstream of the fuel unit.
 Remove and clean the combustion head (page 35).
 Examine and clean the ignition electrodes, adjust and replace if necessary (see page 35).
 Examine and clean the detection probe, adjust and replace if necessary (see page 36).
 Examine the detection current (see page 36).
 Remove and clean (page 36) the heavy oil nozzle (Important: use solvents for cleaning, not metallic tools) and at the end of
the maintenance procedures, after replacing the burner, turn it on and check the shape of the flame; if in doubt replace the nozzle.
Where the burner is used intensively it is recommended to replace the nozzle as a preventive measure, at the begin of the operating season.
 Clean and grease joints and rotating parts.
IMPORTANT:Remove the combustion head before checking the ignition electrodes.


CAUTION: avoid the contact of steam, solvent and other liquids with the electric terminals of the resistor.
On flanged heaters, replace the seal gasket before refitting it.
Periodic inspections must be carried out to determine the frequency of cleaning.
Self-cleaning filter
Fitted only on high viscosity oil burners. Periodically turn the knob to clean the filter.
34
Removing the combustion head
Remove the cover H.
Slide the photoresistor out of its housing.
 Unscrew the oil connections E (Fig. 28) connecting the flexible pipes to the gun L and remove the whole assembly as shown in Fig.
28-Fig. 29.
 clean the combustion head by means of a vacuum cleaner; to scrape off the scale use a metallic brush.
Note: to replace the combustion head reverse the procedure described above.


5
H
4
L
1
2
3
1
2
3
5
E
1
Fig. 28
2
Key
1 Inlet
3
2 Return
3 Lance opening
4 Heating wire (only on high density oil burners)
5 Cartdrige-type heater
H Cover
Fig. 29
L Oil lance
E Oil piping connections
Removing the oil gun, replacing the nozzle and the electrodes
ATTENTION: avoid the electrodes to get in touch with metallic parts (blast tube, head, etc.), otherwise the boiler operation
would be compromised. Check the electrodes position after any intervention on the combustion head.
To remove the oil gun, proceed as follows:
1 remove the combustion head as described on the prevoius paragraph;
2 loosen the VL screw and remove the oil gun and the electrodes: check the oil gun, replace it fi necessary;
3 after removing the oil gun, unscrew the nozzle and replace it if necessary;
4 in order to replace the electrodes, unscrew the VE fixing screws and remove them: place the new electrodes being careful to
observe the measures showed on pag.: reassemlbe following the reversed procedure.
VE
VL
Fig. 30
35
Nozzle and ignition electrodes correct position
Place the nozzle according to the combustion head; unscrew VB and move the combustion head. Check the ignition electrodes at the
end of the procedure.
E
N
B
M
N
Fig. 31
B
C
M
3 ÷ 5 mm 3 ÷ 4 mm 10 ÷ 15 mm
N
E
F
10 mm
13 mm
8 mm
Checking the detection current
To check the flame itensity signal, follow the diagram shown on the next picture. If the measured value is lower than the suggested one,
check the photoresistor position, the electrical contacts. Replace the photoresistor if necessary.
MA TERMINAL BLOCK
34 35
Siemens LAL2.. control box
Minimum detection current @ 230V
8 µA
Maximum detection current without flame
0.8 µA
Maximum detection current
35 µA
SCALE µA DC
Fig. 32
Cleaning and replacing the detection photoresistor
To clean/replace the photoresistive detector, remove it from its slot. To clean the photoresistor, use a clean cloth, not cleaning sprays.
Seasonal stop
To stop the burner in the seasonal stop, proceed as follows:
1 turn the burner main switch to 0 (Off position)
2 disconnect the power mains
3 close the fuel valve of the supply line
Burner disposal
In case of disposal, follow the instructions according to the laws in force in your country about the “Disposal of materials”.
36
AUXILIARY FUSE BLOWN
OIL RESISTOR FAULTY
OIL ENABLING THERMOSTAT TRIPPED
CONTROL UNIT MALFUNCTION
BURNER STARTS
UP WITH COLD OIL
GOES OFF AND
REPEATS THE
CYCLE DURING
OPERATION
FAN THERMAL CUTOUT TRIPPED
GOES TO SHUT
DOWN DURING
OPERATION
MAXIMUM THERMOSTAT MALFUNCTION
DOES NOT PASS
TO HIGH FLAME
LINE FUSES BLOWN








DOES NOT IGNITE
AND GOES TO
SHUT DOWN
MAIN SWITCH OFF
CONTINUES PREPURGUE
CAUSES/TROUBLES
DOES NOT START
UP
TROUBLESHOOTING









AIR SERVOCONTROL MALFUNCTION

CIRCUIT ENABLING THERMOSTAT
SMOKY FLAME




IGNITION TRANSFORMER FAULTY
IGNITION ELECTRODES WRONGLY POSITIONED
DIRTY NOZZLE
FAULTY OIL VALVE





FAULTY OR DIRTY PHOTORESISTOR
FAULTY RESISTOR THERMOSTAT



FAULTY HIGH-LOW FLAME THERMOSTAT
ACTUATOR CAM NOT CALIBRATED

LOW OIL PRESSURE
37


BURNER EXPLODED VIEW
ITEM
38
1
2
3
4
5
6
7
8
9.1
9.2
9.3
9.4
9.5
9.5.1
9.6
9.7
9.8
9.9
9.10
9.11
9.12
9.13.1
9.13.2
10
11
12.1
12.2
12.3
12.4
12.5
12.6
12.7
12.8
12.9
12.10.1
DESCRIPTION
FLANGE
AIR INLET CONE
CLOSING PLATE
INDEX LABEL
RING NUT
PLATE
PLATE
PHOTORESISTOR
INDEX LABEL
BUSH
BUSH
ADJUSTING CAM SHAFT
ADJUSTING CAM
ADJUSTING CAM FOIL
ACTUATOR
LEVERAGE
CAM
JOINT
BRACKET
BRACKET
BRACKET
PRESSURE GOVERNOR
BRACKET
EXTENDED BLAST TUBE
AIR DAMPER INDEX
NET
BURNER HOUSING
FLANGE
CERAMIC FIBRE PLAIT
PRESSURE PLUG
INLET
SCREW
INSPECTION GLASS
AIR PRESSURE SWITCH PIPE
THREADED GAS PIPE
ITEM
12.10.2
12.10.3
12.11.1
12.11.2
12.11.3
12.11.4
12.11.5
12.11.6
12.12
12.13.1
12.13.2
12.13.3
13.1
13.2
13.3
14.1
14.2
14.3
14.4
14.5
14.6.1
14.6.2
14.6.3
14.6.4
15.1
15.1.1
15.1.2
15.1.3.1
15.1.3.2
15.2
15.3
15.4.1
15.4.2
15.4.3
15.4.4
DESCRIPTION
AIR PRESSURE SWITCH
PRESSURE SWITCH BRACKET
AIR DAMPER SILENCER
AIR INTAKE DAMPER
LEVERAGE
ROD
JOINT
JOINT
CONNECTOR
SPACER
SILENCER
SILENCER
OIL SOLENOID VALVE
OIL MANIFOLD
CONNECTOR
PLUG
PLUG
OIL PRE-HEATER
SHEATH
RESISTOR
OIL FILTER
GASKET
GAS BLEEDING VALVE
THERMOMETER
STANDARD COMPLETE OIL GUN
NOZZLE
NOZZLE HOLDER
OIL MANIFOLD
RESISTOR
OIL GUN HOLDER
COMBUSTION HEAD ADJUSTING PIPE
LONG IGNITION ELECTRODE
LONG IGNITION ELECTRODE
COMBUSTION HEAD
IGNITION CABLE
ITEM
16.1
16.2
16.3
16.4
17.1
17.2
18.1
18.2
18.3.1
18.3.2
18.3.3
18.3.4
18.3.5
18.3.6
18.3.7
18.3.8
19.1
19.2
DESCRIPTION
MOTOR
COUPLING
PUMP
BRACKET
FAN WHEEL
MOTOR
BOARD
COVER
POWER CONTROLLER
FRONT CONTROL PANEL
LIGHT
LIGHT
LOCK-OUT RESET BUTTON
PROTECTION
SWITCH
SWITCH
CONTROL BOX
IGNITION TRANSFORMER
39
SPARE PARTS
CONTROL BOX - SIEMENS LAL
DESCRIPTION
RN510
2020420
RN515
2020420
RN520
2020420
RN525
2020420
RIGHT ELECTRODE
2080250
2080250
2080250
2080250
LEFT ELECTRODE
2080251
2080251
2080251
2080251
FILTER
2090207
2090207
2090207
2090207
FAN WHEEL
2150010
2150030
2150029
2150029
AIR PRESSURE SWITCH
2160065
2160065
2160065
2160065
2170005
2170005
2170005
2170005
218020601
2180209
2180278
2180289
PUMP MOTOR
2180202
2180223
2180210
2180210
SOLENOID VALVE
2190437
2190437
2190437
2190437
OIL HOSES L = 1500 1”Mx1”F
2340004
2340004
2340004
2340004
OIL GUN HOSES L = 435 3/8”
2340089
2340089
2340089
2340089
ADJUSTING CAM FOIL
2440013
2440013
2440013
-
ACTUATOR SIEMENS SQL..
2480007
2480007
2480007
2480007
IGNITION TRANSFORMER
ELECTRIC MOTOR
ACTUATOR BERGER STM30
2480090
2480090
2480090
2480090
ACTUATOR SIEMENS SQM40
24800A5
24800A5
24800A5
24800A5
PHOTORESISTOR SIEMENS
2510003
2510003
2510003
2510003
COUPLING
2540019
2540126
2540126
2540126
RESISTOR THERMOSTAT TR-TCN-TCI
2560026
2560026
2560026
2560026
THERMOSTAT TRS
2560028
2560028
2560028
2560028
PRESSURE GOVERNOR - viscosity  110cSt (15°E) @ 50° C
25700C6
25700C7
25700C7
-
PRESSURE GOVERNOR - viscosity  400cSt (50°E) @ 50° C
25700A6
25700A7
25700A7
-
BURNER MODULATOR (FULLY-MODULATING BURNERS)
2570112
2570112
2570112
2570112
PUMP
2590119
2590120
2590121
2590121
NOZZLE mod. FLUIDICS WR2 50°
2610203
2610203
2610203
2610203
NOZZLE mod. UNIGAS M3 45°
2610230
2610230
2610230
2610230
STANDARD OIL GUN - viscosity  110cSt (15°E) @ 50° C
2700347
2700347
2700347
-
EXTENDED OIL GUN - viscosity  110cSt (15°E) @ 50° C
2700337
2700337
2700337
-
STANDARD OIL GUN - viscosity  400cSt (50°E) @ 50° C
2700348
2700348
2700348
2700357
EXTENDED OIL GUN - viscosity  400cSt (50°E) @ 50° C
2700338
2700338
2700338
2700358
COMBUSTION HEAD
3060167
3060164
3060169
30601D2
STANDARD BLAST TUBE
30910S4
30910S5
30910S5
30910T2
EXTENDED BLAST TUBE
30910S7
30910S8
30910S9
30910T1
IGNITION CABLE
6050144
6050144
6050144
6050144
NOTE: it is recommended to mention the burner ID number on the spare parts request form.
ELECTRICAL WIRING DIAGRAMS
See attached wiring diagrams.
ATTENTION:
1 - Electric supply 230/400V 50Hz 3N a.c.
2 - Don't reverse phase and neutral
3 - Make sure that the burner is properly hearted
41
APPENDIX
SIEMENS LAL.. CONTROL BOX
Use
 Control and supervision of oil atomization burners
 For burners of medium to high capacity
 For intermittent operation (at least one controlled shutdown every 24
hours)
 Universally applicable for multistage or modulating burners
Housing and plug-in base
 Made of impact-proof and heat-resistance black plastic
 Lockout reset button with viewing window; located behind it:
 Lockout warning lamp
 Lockout indicator coupled to the spindle of the sequence switch and
visible in the transparent lockout reset button
 uses easy-to-remember symbols to indicate the type of fault and the
point in time lockout occurred
Base and plug-in section of the LAL... are designed such that only burner
controls of the LAL... family can be plugged in.
 24 connection terminals
 Auxiliary terminals «31» and «32»
 3 earth terminals terminating in a lug for earthing the burner
 3 neutral conductor terminals prewired to terminal 2
 14 knockout holes for cable entry by means of cable glands
 8 at the side
 6 in the bottom of the base
 6 lateral threaded knockout holes for cable entry glands Pg11 or M20
Operation
Flame detector and flame simulation test are made automatically during
burner off times and the prepurge time «t1». If loss of flame occurs during
operation, the burner control will initiate lockout. If automatic repetition of
the startup sequence is required, the clearly marked wire link on the plugin section of the LAL... must be cut away.
Pre-conditions for burner startup
 Burner control is not in the lockout position
 Sequence switch is in its start position (with LAL2 voltage is present at
terminals 11 and 12.
 Air damper is closed; end switch «z» for the CLOSED position must
feed power from terminal 11 to terminal8.
 Contact of the limit thermostat or pressure switch «W» and the contacts of any other switching devices in the control loop between terminals 4 and 5 must be closed e.g. a control contact for the oil
preheater’s temperature
 Normally closed contact of the air pressure switch must be closed.
Startup sequence
Start command by «R»:
«R» closes the start control loop between terminals 4 and 5
 The sequence switch starts to run
 Only prepurging, fan motor at terminal 6 receives power
 Pre- and postpurging, fan motor or flue gas fan at terminal 7 receives
power on completion of «t7»
 On completion of «t16», the control command for opening the air damper is delivered via terminal 9
 Terminal 8 receives no power during the positioning time
 The sequence switch continues to run only after the air damper has
fully closed.
t1
Prepurge time with air damper fully open:
 The correct functioning of the flame supervision circuit is checked
during «t1»
 The burner control will initiate lockout if correct functioning is not ensu-
red.
With LAL2:
Shortly after the beginning of «t1», the air pressure switch must change
over from terminal 13 to terminal 14 otherwise, the burner control will initiate lockout start of the air pressure check.
t3
Short preignition time:
«Z» must be connected to terminal 16, release of fuel via terminal 18.
t3’
Long preignition time: «Z» connected to terminal 15.
t3n Postignition time:
- «Z» must be connected to terminal 15
- With short preignition, «Z» remains on until «TSA» has elapsed connection to terminal 16.
t4
Interval «BV1 – BV2» or «BV1 - LR»: On completion of «t4», voltage is present at terminal 19. The voltage is required to power «BV2»
connected to auxiliary switch «v» in the actuator.
t5
Interval: On completion of «t5», terminal 20 receives power. At the
same time, control outputs 9 to 11 and input 8 are galvanically separated
from the LAL...’s control section.
LAL... is now protected against reverse voltages from the load control
circuit. With the release of «LR» at terminal 20, the startup sequence of
the LAL... ends. After a few idle steps (steps with no contact position
changes), the sequence switch switches itself off.
B
Operating position of the burner
B-C Burner operation: during burner operation, «LR» drives the air
damper to the nominal load or low-fire position, depending on heat
demand; the release of the nominal load takes place via auxiliary switch
«v» in the actuator and in the event of loss of flame during operation, the
LAL... will initiate lockout. For automatic start repetition, the clearly marked wire link «B» on the plugin section of the LAL... must be cut away.
C
Controlled shutdown: in the case of controlled shutdown, «BV...»
will immediately be closed. At the same time, the sequence switch is started to program «t6»
C-D Sequence switch travels to start position «A»
t6
Postpurge time: fan «M2» connected to terminal 7. Shortly after the
start of «t6», terminal 10 receives power and the air damper is driven to
the MIN position. Full closing of the air damper starts only shortly before
«t6» has elapsed initiated by the control signal at terminal 11. During the
following burner off time, terminal 11 is live.
t13 Permissible afterburn time: during «t13», the flame signal input
may still receive a flame signal.
D-A End of control program: start position
As soon as the sequence switch has reached the start position – having
thereby switched itself off – the flame detector and flame simulation test
will start again.
During burner off times, the flame supervision circuit is live.
Lockout and indication of the stop position
Whenever a fault occurs, the sequence switch stops and with it the
lockout indicator. The symbol appearing above the reading mark indicates
the type of fault:
No start. One of the contacts is not closed (also refer to «Preconditions for burner startup»):
Extraneous light:
Lockout during or after completion of the control program
Examples: nonextinguished flame, leaking fuel valves faulty flame supervision circuit.
Interruption of startup. No OPEN signal at terminal 8 from the changeover end switch «a». Terminals 6, 7 and 15 are live until fault has
been corrected
P
Lockout. No air pressure indication at the beginning of the air pressure check. Air pressure failure after the air pressure check.
Defect in the flame supervision circuit.
Interruption of the startup sequence. No positioning signal at terminal 8 from the auxiliary switch «m» for the low-fire position. Terminals
6, 7 and 15 are live until fault has been corrected.
1
Lockout. No flame signal at the end of the safety time.
|
Flame signa has been lost during operation.
A
Consenso all’avviamento (ad esempio tramite il termostato o il
pressostato R dell’impianto
B
Operating position of the burner
B-C Burner operation: during burner operation, «LR» drives the air
damper to the nominal load or low-fire position, depending on heat
demand; the release of the nominal load takes place via auxiliary switch
«v» in the actuator and in the event of loss of flame during operation, the
LAL... will initiate lockout. For automatic start repetition, the clearly marked wire link «B» on the plugin section of the LAL... must be cut away.
C
Controlled shutdown: in the case of controlled shutdown, «BV...»
will immediately be closed. At the same time, the sequence switch is started to program «t6»
C-D Sequence switch travels to start position «A».
4 A max., 20 A peak
T6,3H250V according to IEC 127
max. 10 A
Device 1000 g
Plug-in base 165 g
Internal fuse
External fuse
Weight
During burner off times, the flame supervision circuit is live.
Lockout indication
S
L
Q R C 1 ...
H
bl
SB
br
sw
23
22
1
1
AS
b r1
a-b
Startup sequence
b-b’ Idle step (with no contact confirmation)
b(b’)-a Postpurge program
a b
I
a
b
ar1
6
7
M1
M2
4
Q R B 1 ...
23 24
22
a r2
V
W
Burner control can immediately be reset after lockout:
Do not press the lockout reset button for more than 10 seconds
The sequence switch always travels to the start position first
After resetting
After rectification of a fault that led to shutdown
After each power failure
During this period of time, power is only fed to terminals 7 and 9...11.
Then, the LAL.... will program a new burner startup sequence
Specifications
Power supply
AC 230 V -15 / +10 %
for LAL2... on request AC 100 V -15 %...AC 110 V +10 %
Frequency
50 Hz -6 %...60 Hz +6 %
Absorption
AC 3.5 VA
Mounting position
optional
Protection
IP 40
Perm. input current at terminal 1
AC 5 A max., 20 A peak
Perm. current rating of control terminals 3, 6, 7, 9...11, 15...20
N
5
a
b
EK1*
a r3
X III
a
a
b
V II
a
b
fr2
b
IX
b
X IV
fr1
XI
FR
a
R
B
X II
b
a
IV
II
X
b
aa
V III
b a
V
a
b
VI
b
III
a
b
AR
SM
b r2
L1
M
M
E
BR
A
3
21
1 (3 )
2
15
16 18 17 19 9
11 1 0
8
SA
H
AL
20
LR
v
a
M
z
m
LK
EK2*
Z
N
BV1
BV2
7 1 5 3 a 0 7 /0 4 9 6
Sequence diagram
Control output at terminal
A
II
a
b t7
a
b
III
a
b
I
t11
t12
C
t6
D
4
12 *
7
t4
19
16
10
9
t3
IV
V
t1
B
15
t3 n
t3"
9
a
b
t1 6
t5
11
20
VI
V II
a
b
V III
a
b
8
t20
17
IX
t2
X
a
b
XI
a
b
X II
a
b
X III
a
b
X IV
a
b
18
*
t10*
t13
t8
Lockout position indication
T3’
Key
t1
Prepurge time with air damper fully open
t2
Safety time
t3
Preignition time, short («Z» connected to terminal 16)
Preignition time, long («Z» connected to terminal 15)
t3n
Postignition time («Z» connected to terminal 15)
t4
Interval between voltage at terminals 18 and 19 («BV1-BV2»)
t5
Interval between voltage at terminals 19 and 20 («BV2» load
controller)
t6
Postpurge time (with «M2»)
t7
Interval between start command and voltage at terminal 7 (start
delay time for «M2»)
t8
Duration of startup sequence (excluding «t11» and «t12»)
t10
Interval from startup to the beginning of the air pressure check
t11
Air damper running time to the OPEN position
t12
Air damper running time to the low-fire position (MIN)
t13
Permissible afterburn time
t16
Interval to the OPEN command for the air damper
t20
For self-shutdown of the sequence switch
C.I.B. UNIGAS S.p.A.
Via L.Galvani, 9 - 35011 Campodarsego (PD) - ITALY
Tel. +39 049 9200944 - Fax +39 049 9200945/9201269
web site: www.cibunigas.it - e-mail: cibunigas@cibunigas.it
Note: specifications and data subject to change without notice. Errors and omissions excepted.
Open as PDF
Similar pages