Riello RLS 800/M MX Quick start guide

20148124 (2) - 11/2020
Installation, use and maintenance instructions
Dual fuel light oil/ gas burner
Progressive two-stage or modulating operation
CODE MODEL TYPE
20147802 RLS 800/M MX 1301 T
GB

Translation of the original instructions

1 20148124
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Contents
1 Declarations................................................................................................................................................................................ 3
2 Information and general warnings............................................................................................................................................ 4
2.1 Information about the instruction manual .................................................................................................................... 4
2.1.1 Introduction.................................................................................................................................................................. 4
2.1.2 General dangers.......................................................................................................................................................... 4
2.1.3 Other symbols ............................................................................................................................................................. 4
2.1.4 Delivery of the system and the instruction manual...................................................................................................... 5
2.2 Guarantee and responsibility....................................................................................................................................... 5
3 Safety and prevention................................................................................................................................................................ 6
3.1 Introduction.................................................................................................................................................................. 6
3.2 Personnel training ....................................................................................................................................................... 6
4 Technical description of the burner ......................................................................................................................................... 7
4.1 Burner designation ...................................................................................................................................................... 7
4.2 Models available.......................................................................................................................................................... 7
4.3 Burner categories - Countries of destination ............................................................................................................... 7
4.4 Technical data............................................................................................................................................................. 8
4.5 Electrical data.............................................................................................................................................................. 8
4.6 Maximum dimensions.................................................................................................................................................. 9
4.7 Firing rates ................................................................................................................................................................ 10
4.8 Test boiler.................................................................................................................................................................. 10
4.9 Burner description ..................................................................................................................................................... 11
4.10 Electrical panel description........................................................................................................................................ 12
4.11 Burner equipment...................................................................................................................................................... 12
4.12 Control box RFGO-A22............................................................................................................................................. 13
4.13 Servomotor (SQM10.1....) ......................................................................................................................................... 14
5 Installation ................................................................................................................................................................................ 15
5.1 Notes on safety for the installation ............................................................................................................................ 15
5.2 Handling .................................................................................................................................................................... 15
5.3 Preliminary checks .................................................................................................................................................... 15
5.4 Operating position ..................................................................................................................................................... 16
5.5 Removing the shutter lockout screws........................................................................................................................ 16
5.6 Preparing the boiler................................................................................................................................................... 16
5.6.1 Boring the boiler plate ............................................................................................................................................... 16
5.6.2 Blast tube length........................................................................................................................................................ 16
5.7 Securing the burner to the boiler............................................................................................................................... 17
5.8 Access to head internal part...................................................................................................................................... 17
5.9 Electrode position...................................................................................................................................................... 17
5.10 Nozzle installation ..................................................................................................................................................... 18
5.10.1 Recommended nozzle............................................................................................................................................... 18
5.11 Combustion head adjustment.................................................................................................................................... 19
5.12 Light oil supply........................................................................................................................................................... 20
5.12.1 Double-pipe circuit..................................................................................................................................................... 20
5.12.2 Loop circuit................................................................................................................................................................ 20
5.12.3 Hydraulic connections ............................................................................................................................................... 20
5.12.4 Pressure variator....................................................................................................................................................... 21
5.12.5 Hydraulic circuit diagram ........................................................................................................................................... 22
5.12.6 Priming pump ............................................................................................................................................................ 22
5.13 Gas supply ................................................................................................................................................................ 23
5.13.1 Gas feeding line ........................................................................................................................................................ 23
5.13.2 Gas train.................................................................................................................................................................... 24
5.13.3 Gas train installation.................................................................................................................................................. 24
5.13.4 Gas pressure............................................................................................................................................................. 24
5.13.5 Pilot - gas train connection ........................................................................................................................................ 25
5.13.6 Ignition pilot ............................................................................................................................................................... 25

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Contents
5.14 Electrical connections ................................................................................................................................................26
5.14.1 Supply cables and external connections passage .....................................................................................................26
5.15 Calibration of the thermal relay ..................................................................................................................................27
5.16 Motor rotation.............................................................................................................................................................27
6 Start-up, calibration and operation of the burner ..................................................................................................................28
6.1 Notes on safety for the first start-up...........................................................................................................................28
6.2 Burner adjustment......................................................................................................................................................28
6.3 Adjustments prior to ignition.......................................................................................................................................28
6.4 Burner start-up ...........................................................................................................................................................29
6.5 Burner ignition............................................................................................................................................................29
6.6 Change of fuel............................................................................................................................................................29
6.7 Combustion air adjustment ........................................................................................................................................29
6.7.1 Maximum output ........................................................................................................................................................30
6.7.2 Minimum output .........................................................................................................................................................30
6.7.3 Intermediate outputs ..................................................................................................................................................30
6.8 Air / fuel adjustment ...................................................................................................................................................31
6.9 Servomotor ................................................................................................................................................................32
6.10 Pressure switch adjustment .......................................................................................................................................33
6.10.1 Air pressure switch - check CO..................................................................................................................................33
6.10.2 Maximum gas pressure switch...................................................................................................................................33
6.10.3 Minimum gas pressure switch....................................................................................................................................33
6.11 Operation sequence of the burner .............................................................................................................................34
6.11.1 Burner start-up ...........................................................................................................................................................34
6.11.2 Steady state operation ...............................................................................................................................................34
6.11.3 Burner flame goes out during operation.....................................................................................................................34
6.11.4 Ignition failure.............................................................................................................................................................34
6.12 Final checks (with burner operating)..........................................................................................................................35
7 Maintenance ..............................................................................................................................................................................36
7.1 Notes on safety for the maintenance .........................................................................................................................36
7.2 Maintenance programme ...........................................................................................................................................36
7.2.1 Maintenance frequency..............................................................................................................................................36
7.2.2 Safety test - with no gas supply .................................................................................................................................36
7.2.3 Checking and cleaning...............................................................................................................................................36
7.2.4 Safety components ....................................................................................................................................................37
7.3 Opening the burner ....................................................................................................................................................39
7.4 Closing the burner......................................................................................................................................................39
8 LED indicator and special function.........................................................................................................................................40
8.1 Description of LED lamps ..........................................................................................................................................40
8.2 Check mode function .................................................................................................................................................40
8.3 Flame control lock-out or emergency stop condition .................................................................................................40
8.4 LED lamps: burner operating status ..........................................................................................................................41
9 Problems - Causes - Remedies signalled by LED indicators ...............................................................................................42
A Appendix - Accessories ...........................................................................................................................................................47
B Appendix - Electrical panel layout...........................................................................................................................................48

3 20148124
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Declarations
1 Declarations
Declaration of Conformity in accordance with ISO / IEC 17050-1
Manufacturer: RIELLO S.p.A.
Address: Via Pilade Riello, 7
37045 Legnago (VR) Italy
Product: Dual fuel light oil/gas burners
Model and type: RLS 800/M MX 1301 T
These products are in compliance with the following Technical Standards:
EN 676
EN 267
EN 12100
and according to the European Directives:
GAR 2016/426/EU Gas Devices Regulation
MD 2006/42/EC Machine Directive
LVD 2014/35/UE Low Voltage Directive
EMC 2014/30/EU Electromagnetic Compatibility
PED 2014/68/EU (FS2 only) Pressure Equipment Directive
Such products are marked as indicated below:
The quality is guaranteed by a quality and management system certified in accordance with ISO 9001:2015.
Manufacturer's Declaration
RIELLO S.p.A. declares that the following products comply with the NOx emission limits specified by German standard
“1. BImSchV revision 26.01.2010”.
Product Type Model Output
Dual fuel light oil/gas burners 1301 T RLS 800/M MX 1750 - 8000 kW
Legnago, 21.04.2018 General Manager
RIELLO S.p.A. - Burners Department
Research and Development Director
RIELLO S.p.A. - Burners Department
Eng. U. Ferretti Eng. F. Comencini
CE-0085CL0422 Class 3 (EN 676) - Class 2 (EN 267)

20148124 4
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Information and general warnings
2.1 Information about the instruction manual
2.1.1 Introduction
The instruction manual supplied with the burner:
is an integral and essential part of the product and must not
be separated from it; it must therefore be kept carefully for
any necessary consultation and must accompany the burner
even if it is transferred to another owner or user, or to
another system. If the manual is lost or damaged, another
copy must be requested from the Technical Assistance
Centre of the area;
is designed for use by qualified personnel;
offers important indications and instructions relating to the
installation safety, start-up, use and maintenance of the
burner.
Symbols used in the manual
In some parts of the manual you will see triangular DANGER
signs. Pay great attention to these, as they indicate a situation of
potential danger.
2.1.2 General dangers
The dangers can be of 3 levels, as indicated below.
2.1.3 Other symbols
Abbreviations used
Ch. Chapter
Fig. Figure
Page Page
Sec. Section
Tab. Table
2 Information and general warnings
DANGER
Maximum danger level!
This symbol indicates operations which, if not
carried out correctly, cause serious injury, death
or long-term health risks.
ATTENTION
This symbol indicates operations which, if not
carried out correctly, may cause serious injury,
death or long-term health risks.
CAUTION
This symbol indicates operations which, if not
carried out correctly, may cause damage to the
machine and/or injury to people.
DANGER
DANGER: LIVE COMPONENTS
This symbol indicates operations which, if not
carried out correctly, lead to electric shocks with
lethal consequences.
DANGER: FLAMMABLE MATERIAL
This symbol indicates the presence of flammable
materials.
DANGER: BURNING
This symbol indicates the risks of burns due to
high temperatures.
DANGER: CRUSHING OF LIMBS
This symbol indicates the presence of moving
parts: danger of crushing of limbs.
WARNING: MOVING PARTS
This symbol indicates that you must keep limbs
away from moving mechanical parts; danger of
crushing.
DANGER: EXPLOSION
This symbol signals places where an explosive
atmosphere may be present. An explosive
atmosphere is defined as a mixture - under
atmospheric conditions - of air and flammable
substances in the form of gases, vapours, mist or
dust in which, after ignition has occurred,
combustion spreads to the entire unburned
mixture.
PERSONAL PROTECTION EQUIPMENT
These symbols indicate the equipment that must
be worn and kept by the operator for protection
against threats against safety and/or health while
at work.
OBLIGATION TO ASSEMBLE THE COVER
AND ALL THE SAFETY AND PROTECTION
DEVICES
This symbol signals the obligation to reassemble
the cover and all the safety and protection devices
of the burner after any maintenance, cleaning or
checking operations.
ENVIRONMENTAL PROTECTION
This symbol gives indications for the use of the
machine with respect for the environment.
IMPORTANT INFORMATION
This symbol indicates important information that
you must bear in mind.
This symbol indicates a list.

5 20148124
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Information and general warnings
2.1.4 Delivery of the system and the instruction
manual
When the system is delivered, it is important that:
the instruction manual is delivered to the user by the system
manufacturer, with the recommendation to keep it in the
room where the heat generator is to be installed.
The instruction manual shows:
–the serial number of the burner;
–the address and telephone number of the nearest
Assistance Centre;
The system supplier must carefully inform the user about:
–the use of the system;
–any further tests that may be required before activating the
system;
–maintenance, and the need to have the system checked at
least once a year by a representative of the manufacturer
or another specialised technician.
To ensure a periodic check, the manufacturer
recommends the drawing up of a Maintenance Contract.
2.2 Guarantee and responsibility
The manufacturer guarantees its new products from the date of
installation, in accordance with the regulations in force and/or the
sales contract. At the moment of the first start-up, check that the
burner is integral and complete.
In particular, the rights to the guarantee and the responsibility will
no longer be valid, in the event of damage to things or injury to
people, if such damage/injury was due to any of the following
causes:
incorrect installation, start-up, use and maintenance of the
burner;
improper, incorrect or unreasonable use of the burner;
intervention of unqualified personnel;
carrying out of unauthorised modifications on the equipment;
use of the burner with safety devices that are faulty,
incorrectly applied and/or not working;
installation of untested supplementary components on the
burner;
powering of the burner with unsuitable fuels;
faults in the fuel supply system;
continuation of use of the burner when a fault has occurred;
repairs and/or overhauls incorrectly carried out;
modification of the combustion chamber with inserts that
prevent the regular development of the structurally
established flame;
insufficient and inappropriate surveillance and care of those
burner components most likely to be subject to wear and
tear;
use of non-original components, including spare parts, kits,
accessories and optional;
force majeure.
The manufacturer furthermore declines any and every
responsibility for the failure to observe the contents of this
manual.
.........................................................................................
.........................................................................................
.........................................................................................
.........................................................................................
ATTENTION
Failure to observe the information given in this
manual, operating negligence, incorrect
installation and carrying out of non authorised
modifications will result in the annulment by the
manufacturer of the guarantee that it supplies with
the burner.

20148124 6
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Safety and prevention
3.1 Introduction
The burners have been designed and built in compliance with
current regulations and directives, applying the known technical
safety rules and envisaging all the potential danger situations.
It is necessary, however, to bear in mind that the imprudent and
clumsy use of the equipment may lead to situations of death risk
for the user or third parties, as well as the damaging of the burner
or other items. Inattention, thoughtlessness and excessive
confidence often cause accidents; the same applies to tiredness
and sleepiness.
It is a good idea to remember the following:
The burner must only be used as expressly described. Any
other use should be considered improper and therefore
dangerous.
Specifically:
it can be applied to boilers operating with water, steam,
diathermic oil, and to other uses expressly named by the
manufacturer;
the type and pressure of the fuel, the voltage and frequency of the
electrical power supply, the minimum and maximum deliveries for
which the burner has been regulated, the pressurisation of the
combustion chamber, the dimensions of the combustion
chamber and the ambient temperature must all be within the
values indicated in the instruction manual.
Modification of the burner to alter its performance and
destinations is not allowed.
The burner must be used in exemplary technical safety
conditions. Any disturbances that could compromise safety
must be quickly eliminated.
Opening or tampering with the burner components is not
allowed, apart from the parts requiring maintenance.
Only those parts envisaged by the manufacturer can be
replaced.
3.2 Personnel training
The user is the person, body or company that has acquired the
machine and intends to use it for the specific purpose. He is
responsible for the machine and for the training of the people
working around it.
The user:
undertakes to entrust the machine exclusively to suitably
trained and qualified personnel;
undertakes to inform his personnel in a suitable way about
the application and observance of the safety instructions.
With that aim, the user undertakes to ensure that everyone
knows the use and safety instructions for his own duties;
Personnel must observe all the danger and caution
indications shown on the machine.
Personnel must not carry out, on their own initiative,
operations or interventions that are not within their province.
Personnel must inform their superiors of every problem or
dangerous situation that may arise.
The assembly of parts of other makes, or any modifications,
can alter the characteristics of the machine and hence
compromise operating safety. The manufacturer therefore
declines any and every responsibility for any damage that
may be caused by the use of non-original parts.
In addition:
3 Safety and prevention
ATTENTION
The manufacturer guarantees safety and proper
operation only if all burner components are intact
and correctly positioned.
must take all the measures necessary to
prevent unauthorised people gaining access
to the machine;
the user must inform the manufacturer if
faults or malfunctioning of the accident
prevention systems are noticed, along with
any presumed danger situation;
personnel must always use the personal
protective equipment envisaged by legislation
and follow the indications given in this
manual.

7 20148124
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Technical description of the burner
4.1 Burner designation
4.2 Models available
Tab. A
4.3 Burner categories - Countries of destination
Tab. B
4 Technical description of the burner
Designation Voltage Start-up Code
RLS 800/M MX 3/400/50 Star/Triangle 20147802
Series: R
Size
Fuel: Natural gas
Light oil
Light oil / Methane
Adjustment:
Flame control system:
FS1 Standard (1 stop every 24 h)
Electrical supply of the system:
3/400/50
3/230/50
Voltage of auxiliaries:
230/50
110/50/60
RLS 800 MTC
Emission: ... Class 1 EN267 - EN676
MY Class 1 EN267 - Class 3 EN676
BLU Class 3 EN267 - EN676
MX Class 2 EN267
Class 3 EN676
FS1 3/400/50 230/50
BASIC DESIGNATION
EXTENDED DESIGNATION
MX
3N / 400V / 50Hz
3 / 230V / 50Hz
230V / 50Hz
110V / 50-60Hz
Heavy oil
E Electronic cam
EV Electronic cam and variable speed (with Inverter)
P Proportional air/gas valve
BP Two stage (light oil) / Proportional valve (gas)
M Mechanical cam
S
L
LS
N
Head: TC Standard head
TL Extended head
FS2 Continuous operation only with the use of a flame detection
electrode (ionisation)
Country of destination Gas category
SE - FI - AT - GR - DK - ES - GB - IT - IE - PT - IS - CH - NO I2H
DE I2ELL
NL I2L - I2E - I2(43.46 ÷ 45.3 MJ/m3(0°C))
FR I2Er
BE I2E(R)B
LU - PL I2E

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Technical description of the burner
4.4 Technical data
Tab. C
(1) Reference conditions: Ambient temperature 20°C - Gas temperature 15°C - Barometric pressure 1013 mbar - Altitude 0 m a.s.l.
(2) Pressure at test point 5)(Fig. 4) with zero pressure in combustion chamber and at maximum burner output.
(3) Sound pressure measured in manufacturer's combustion laboratory, with burner operating on test boiler and at maximum output. The sound power
is measured using the "Free Field" method, required by EN 15036 standard, and according to an “Accuracy: Category 3” measurement, as
described in EN ISO 3746.
4.5 Electrical data
Tab. D
Model RLS 800/M MX TC FS1
Type 1301 T
Output (1)
Delivery (1)
min - max kW
kg/h
1750/3500 ÷ 8000
147/295 ÷ 674
Fuels - LIGHT OIL, max. viscosity at 20 °C: 6 mm2/s (1.5 °E - 6 cSt)
- NATURAL GAS: G20 (methane gas) - G21 - G22 - G23 - G25
- LPG: G31 - NCV 26 kWh/Nm3
Gas pressure at max. output (2) -
Gas: G20/G25
mbar 50.6 / 75.4
Operation - Intermittent (min. 1 stop in 24 hours)
- Progressive two-stage or modulating by kit (see accessories)
Pump Output at 16.5 bar
Pressure range
Fuel temperature
kg/h
bar
°c max
560
6 - 30
140
Nozzles number 1
Standard applications Boilers: water, steam, diathermic oil
Ambient temperature °C 0 - 50
Combustion air temperature °C max 60
Noise levels (3) Sound pressure
Sound power dB(A) 89.6 100.6
Weight kg 320
Model RLS 800/M MX TC FS1
Electrical power supply 3N ~ 400V +/-10% 50 Hz
Fan motor IE3 rpm
V
kW
A
2950
400/690
22
39.4/22.7
Pump motor IE3 rpm
V
kW
A
2890
220-240/380-415
1.5
5.9/3.4
Ignition transformer V1 - V2
I1 - I2
230 V - 1 x 8 kV
1 A - 20 mA
Electrical power consumption Light oil
Gas
kW max 26.2
24.5
Protection level IP 54

9 20148124
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Technical description of the burner
4.6 Maximum dimensions
The dimensions of the burner are given in Fig. 1.
Bear in mind that inspection of the combustion head requires the
burner to be opened and the rear part turned on the hinge.
The maximum dimensions of the open burner are indicated by
the L and R positions.
The l position is reference for the refractory thickness of the boiler
door.
Tab. E
mm A B C D E F G H I L R S
RLS 800/M MX 1333 558 173 428 626 DN80 972 988 388 1187 1061 349
I
BA
D
E
C
F
G
H
L
S S
R
D9251
Fig. 1

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Technical description of the burner
4.7 Firing rates
The MAXIMUM OUTPUT is chosen from within the diagram area
(Fig. 2).
The MINIMUM OUTPUT must not be lower than the minimum
limit of the diagram:
RLS 800/M MX = 1750 kW
4.8 Test boiler
The burner/boiler combination does not pose any problems if the
boiler is EC approved and its combustion chamber dimensions
are similar to those indicated in the diagram (Fig. 3).
If the burner must be combined with a boiler that has not been EC
approved and/or its combustion chamber dimensions are clearly
smaller than those indicated in the diagram (Fig. 3), consult the
manufacturer.
The firing rates were obtained in special test boilers, according to
EN 676 standard.
In (Fig. 3) you can see the diameter and length of the test
combustion chamber.
Example:
Output 7000 kW
diameter 120 cm
length 6 m
MODULATING RATIO
The modulating ratio, obtained in the test boilers, according to the
standard (EN 676 for gas, EN 267 for light oil), is 2.5: 1.
ATTENTION
The firing rate value (Fig. 2) has been obtained
considering an ambient temperature of 20 °C, an
atmospheric pressure of 1013 mbar (approx. 0 m
a.s.l.), and with the combustion head adjusted as
shown on page 19.
Pressure in the chamber
pressure - mbar
Thermal power - kW
D10725
400 1200 2000 2800 3600 4400
0
2
4
6
8
10
12
14
16
18
20
5200 6000 6800 7600 8400
22
Class 3 EN676
Class 1 EN267
Class 3 EN676
Class 2 EN267
Fig. 2
Combustion chamber
m
D2448
Fig. 3

11 20148124
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Technical description of the burner
4.9 Burner description
1 Lifting rings
2Fan
3Fanmotor
4 Servomotor
5 Combustion head gas pressure test point
6 Combustion head
7 Ignition pilot
8 Flame stability disc
9 Electrical panel casing
10 Hinge for opening the burner
11 Fan air inlet
12 Pipe coupling
13 Gasket for boiler fixing
14 Gas train flange
15 Shutter
16 Combustion head movement lever
17 Air damper movement gears
18 Air pressure switch (differential type)
19 Combustion head air pressure test point
20 Maximum gas pressure switch with pressure test point
21 Flame sensor
22 Pressure test point for air pressure switch “+”
23 Pump
24 Pump motor
25 Minimum oil pressure switch
26 Maximum oil pressure switch
27 Nozzle return pressure gauge
28 Nozzle delivery pressure gauge
29 Oil modulator
30 Pressure gauge connection
31 Pilot gas train
15
6
19
16
1
17
1
910
26
27
28
14
2329
30
25
20
11
31
7
8
24
13 5
12 21 18 22
423
D9242
Fig. 4
CAUTION
The burner can be opened to the right or to the left
without links to the fuel supply side.
When the burner is closed, the hinge can be
refitted on the opposite side.

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Technical description of the burner
4.10 Electrical panel description
1 Terminal board for kits
2 Dry contact relay output
3 Ignition transformer
4 Bracket to apply the RWF output regulator kit
5 Stop push-button
6 OFF-automatic-manual selector
7 Power increase - power reduction selector
8 Light signalling burner on
9 Light signalling of motor thermal relay operation
10 Burner lockout warning lamp and reset switch
11 Electrical control box
12 Star/triangle starter
13 Timer
14 Air pressure switch
15 Main terminal supply board
16 Supply cables and external connections passage
17 Fuel selector and enable signal to remote fuel selector
18 Auxiliary circuits fuse
19 Plug/socket servomotor
20 Plug/socket valves/motor
21 Fan motor thermal relay
22 Pump motor contactor and thermal relay
23 Oil/Gas selection relay
24 Plug/socket maximum gas pressure switch
25 Flame sensor plug/sensor socket
NOTE
Two types of burner lockout may occur:
Control box lockout: if the button (red LED) of control box
11)(Fig. 5) and signal button 10)(Fig. 5) light up, the burner
is locked out.
Release by pressing button 10)(Fig. 5).
Motor lockout: release by pressing the button on thermal
relay.
4.11 Burner equipment
Gasket for gas train flange . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
Gas flange fixing screws, M 16 x 50 . . . . . . . . . . . . . . . . . No. 8
Thermal flange gasket . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
Spacers (see Fig. 17). . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 2
Screws to fix the burner flange to the boiler:
M 18 x 70 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 4
Instruction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
Spare parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
1
4
3
2
11
10
9
8
17
7
6
5
14
25
24
22
20 19 16 18 12
13 16 15
21
23
Fig. 5
20160527

13 20148124
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Technical description of the burner
4.12 Control box RFGO-A22
Important notes
All interventions (assembly and installation operations,
assistance, etc.) must be carried out by qualified personnel.
Before modifying the wiring in the control box connection
area, fully disconnect the system from the power supply
(omnipolar separation).
Protection against electrocution from the control box and all
connected electric components is obtained with the correct
assembly.
Before any intervention (assembly and installation
operations, assistance, etc.), ensure the wiring is in order
and that the parameters are correctly set, then make the
safety checks.
Falls and collisions can negatively affect the safety
functions. In this case, the control box must not be operated,
even if it displays no evident damage.
For safety and reliability, comply with the following
instructions:
– avoid conditions that can favour the development of
condensate and humidity. Otherwise, before switching on
again, make sure that the entire control box is perfectly dry!
– Static charges must be avoided since they can damage the
control box’s electronic components when touched.
Use
The control box is a control and supervision system of medium
and large capacity forced draught burners.
If used with the flame detection electrode the system can operate
continuously whereas, with the use of UV sensors it operates
intermittently with stop and restart request at least once every
24h.
Installation notes
• Make sure that the electrical wiring inside the boiler complies
with national and local safety regulations.
• Do not confuse the powered conductors with the neutral
ones.
• Ensure that spliced wires cannot get into contact with
neighbouring terminals. Use adequate ferrules.
• Arrange the H.V. ignition cables separately, as far as
possible from the control box and the other cables.
• When wiring the unit, make sure that AC 230 V mains voltage
cables are run strictly separate from extra low-voltage cables
to avoid risks of electrical shock hazard.
Technical data
Tab. F
Electrical wiring of the flame detector
It is important for signal transmission to be almost totally free of
any disturbances or loss:
• Always separate the detector cables from the other cables:
– The capacitive reactance of the line reduces the size of the
flame signal.
– Use a separate cable.
• Respect the allowed cable lengths.
• The ionisation probe is not protected against the risk of
electrocution. When connected to the electricity supply, the
ionisation probe must be protected against any accidental
contact.
• Position the ignition electrode and the ionisation probe so
that the ignition spark cannot form an arc on the probe (risk
of electric overcharge).
ATTENTION
To avoid accidents, material or environmental
damage, observe the following instructions!
The control box is a safety device! Avoid opening
or modifying it, or forcing its operation. The
Manufacturer cannot assume any responsibility
for damage resulting from unauthorised work!
Mains voltage AC 230 V -15% / +10%
Mains frequency 50 / 60 Hz
Primary fuse (external) Refer to the electric
system
Weight approx. 1.1 kg
Power absorption approx. AC 7 VA
Protection level IP40
Safety class II
Environmental conditions
Operation
Climatic conditions
Mechanical conditions
Temperature range
Humidity
DIN EN 60721-3-1
Class 1K2
Class 1M2
-40...+60°C
< 90% RH (non-condensing)
Fig. 6
20152163

20148124 14
GB
Technical description of the burner
4.13 Servomotor (SQM10.1....)
Important notes
All interventions (assembly and installation operations,
assistance, etc.) must be carried out by qualified personnel.
Before modifying the wiring in the connection area of the
servomotor, fully disconnect the burner control device from
the power supply (omnipolar separation).
To avoid the risk of electrocution, protect the connection
terminals in a suitable manner and correctly fix the cover.
Check the wiring is in order.
Falls and collisions can negatively affect the safety
functions. In this case, the servomotor must not be operated,
even if it displays no evident damage.
Assembly notes
• Check the relevant national safety standards are respected.
• When assembling the servomotor and connecting the
damper, the gears can be disengaged by means of a lever,
allowing the drive shaft to be easily adjusted in both
directions of rotation.
Technical data
Tab. G
ATTENTION
To avoid accidents, material or environmental
damage, observe the following instructions!
Avoid opening, modifying or forcing the
actuators.
Operating voltage AC 220...240V, 50 Hz –15 % / +10 %
AC 220 V, 60 Hz –15 % / +10 %
Switching capacity of
auxiliary devices and
limit switches
10 (3) A, AC 24...250 V
Angle
positioning up to 160° (full scale)
Assembly position option
Protection level IP 54, DIN 40050
Safety class I
Weight approx. 1.7 kg
Actuator motor synchronous motor
Power absorption 9 VA
Environmental conditions:
Operation
Climatic conditions
Mechanical conditions
Temperature range
Humidity
DIN EN 60 721-3-1
Class 1K3
Class 1M2
-20...+70 °C
< 95% RH
S8413
Fig. 7

15 20148124
GB
Installation
5.1 Notes on safety for the installation
After carefully cleaning all around the area where the burner is to
be installed, and arranging for the environment to be illuminated
correctly, proceed with the installation operations.
5.2 Handling
The burner packaging includes a wooden platform, it is therefore
possible to handle the burner (still packaged) with a pallet truck
or fork lift truck.
5.3 Preliminary checks
Checking the consignment
Checking the characteristics of the burner
Check the identification label of the burner, showing:
the model (A)(Fig. 8) and type of burner (B);
the year of manufacture, in cryptographic form (C);
the serial number (D);
the data for electrical supply and the protection level (E);
the absorbed electrical power (F);
the types of gas used and the relative supply pressures (G);
the data of the burner's minimum and maximum output
possibilities (H) (see Firing rate)
Warning. The burner output must be within the firing rate of
the boiler;
the category of the appliance/countries of destination (I).
light oil maximum viscosity (L).
5 Installation
DANGER
All the installation, maintenance and disassembly
operations must be carried out with the electricity
supply disconnected.
ATTENTION
The installation of the burner must be carried out
by qualified personnel, as indicated in this manual
and in compliance with the standards and
regulations of the laws in force.
DANGER
The combustion air inside the boiler must be free
from hazardous mixes (e.g.: chloride, fluoride,
halogen); if present, it is highly recommended to
carry out cleaning and maintenance more
frequently.
ATTENTION
Burner handling operations can be highly
dangerous if not carried out with the greatest
attention: distance unauthorised personnel, check
integrity and suitability of the means available.
Check also that the area in which you are working
is empty and that there is an adequate escape
area (i.e. a free, safe area to which you can
quickly move if the burner should fall).
During handling, keep the load at no more than
20-25 cm from the ground.
After positioning the burner near the installation
point, correctly dispose of all residual packaging,
separating the various types of material.
CAUTION
Before proceeding with the installation operations,
carefully clean all around the area where the
burner will be installed.
CAUTION
After removing all the packaging, check the
integrity of the contents. In the event of doubt, do
not use the burner; contact the supplier.
The packaging elements (wooden cage or
cardboard box, nails, clips, plastic bags, etc.)
must not be abandoned as they are potential
sources of danger and pollution; they should be
collected and disposed of in the appropriate
places.
ATTENTION
A burner label that has been tampered with,
removed or is missing, along with anything else
that prevents the definite identification of the
burner makes any installation or maintenance
work difficult
R.B.L.
GAS- KAASU
GAZ- AEPIO
0085
RIELLOS.p.A.
I-37045 Legnago (VR)
CE
HEIZÖLFUEL
D9243
ABC
EDF
HG
GH
I
L
Fig. 8

20148124 16
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Installation
5.4 Operating position
The burner is designed to operate only in positions 1, 2, 3 and 4.
Installation 1is preferable, as it is the only one that allows the
maintenance operations as described in this manual.
Installations 2, 3 and 4 permit operation but make maintenance
and inspection of the combustion head more difficult.
Any other position could compromise the correct operation of the
appliance.
The installation 5is prohibited for safety reasons.
5.5 Removing the shutter lockout screws
5.6 Preparing the boiler
5.6.1 Boring the boiler plate
Pierce the closing plate of the combustion chamber, as in Fig. 11.
The position of the threaded holes can be marked using the
thermal insulation screen supplied with the burner.
5.6.2 Blast tube length
The length of the blast tube must be selected according to the
indications provided by the manufacturer of the boiler, and in any
case it must be greater than the thickness of the boiler door
complete with its fettling.
For boilers with front flue passes 1)(Fig. 12) or flame inversion
chamber, a protection in refractory material 5) must be inserted
between the boiler fettling 2) and the blast tube 4).
This protection must not compromise the extraction of the blast
tube.
For boilers with a water-cooled front piece, a refractory lining 2)-
5)(Fig. 12) is not necessary, unless expressly requested by the
boiler manufacturer.
Tab. H
2 3 4 51
D7739
Fig. 9
ATTENTION
Remove the screws 1)-2) and nuts before fitting
the burner onto the boiler (Fig. 10).
Replace with the screws 3) M12 x25 supplied as
standard.
1
2
1
2
3
3
D12015
Fig. 10
mm ABC
RLS 800/M MX 440 495 M 18
D455
Fig. 11

17 20148124
GB
Installation
5.7 Securing the burner to the boiler
Prepare a suitable lifting system using rings 3)(Fig. 12).
Fit the heat insulation supplied onto the blast tube 4)
(Fig. 12).
Fit the entire burner onto the boiler hole prepared previously,
as in Fig. 11, and fasten with the screws supplied.
5.8 Access to head internal part
In order to reach inside the combustion head (Fig. 13) proceed as
follows:
disconnect the electrical wiring related to oil pump/
servomotor, air servomotor and gas pressure switch;
disconnect the leverages related to air damper and head
movement;
undo the 4 fixing screws 1);
disconnect the electrode cable 2);
disconnect the light oil pipes unscrewing the two pipe fittings
3).
Release the ignition pilot retainer;
remove the gas pressure screw/test point 6) of the head;
disconnect the lower part of the elbow until it is released
from its housing;
remove the internal part of the head 5).
5.9 Electrode position
ATTENTION
The seal between burner and boiler must be
airtight.
5
2
1
1
33 87
4
D8364
Fig. 12
ATTENTION
Be careful as some drops of fuel may leak out
during this phase.
1
1
3
4
5
2
6
D9337
Fig. 13
ATTENTION
Position the electrode on ignition pilot according to
the dimensions shown in Fig. 14.
18.5
0
-2
71.5
±1
Diffuser Electrode
D9218
Fig. 14

20148124 18
GB
Installation
5.10 Nozzle installation
The burner complies with the emission requirements of the EN
267 standard. In order to guarantee that emissions do not vary,
recommended and/or alternative nozzles specified by Riello in
the Instruction and warning booklet should be used.
Fit the nozzle with a pipe wrench (24 mm), passing through the
central opening of the flame stability disc (Fig. 15).
Fit the nozzles on the nozzle holder without the fuel interception
rod.
To calibrate the flow rate range within which the nozzle should
operate, it is necessary to adjust the fuel pressure on the nozzle
return line, according to Tab. I and Tab. J.
5.10.1 Recommended nozzle
• Bergonzo type B5 45°
• Fluidics type N4 45°
For intermediate delivery levels, choose the nozzle with delivery
slightly higher than that effectively required.
Complete range of nozzles:
Bergonzo type B5 45°
350 - 375 - 400 - 425 - 450 - 475 - 500 - 525 - 550 - 575 -
600 - 650 - 700 - 750. Normally, atomisation angles of 45°
are recommended.
Tab. I
Fluidics type N4 45°:
375 - 400 - 450 - 500 - 550 - 600 - 650 - 700 - 750. Normally,
atomisation angles of 45° are recommended.
Tab. J
ATTENTION
It is advisable to replace the nozzle once a year
during periodical maintenance.
CAUTION
The use of nozzles other than those specified by
Riello S.p.A. and inadequate regular maintenance
may result into emission limits non-conforming to
the values set forth by the regulations in force, and
in extremely serious cases, into potential hazards
to people and objects.
The manufacturing Company shall not be liable
for any such damage arising from non-
observance of the requirements contained in this
manual.
ATTENTION
Do not use any sealing products such as:
gaskets, tape or sealants.
Be careful to avoid damaging the nozzle
sealing seat.
The nozzle must be screwed into place tightly
but not to the maximum torque value
provided by the wrench.
40 mm
D9248
Fig. 15
kg/h Delivery
pressure
bar
Return
pressure
bar
kg/h kW
375 20 11.5 147 1750
20 17 295 3500
550 20 10 170 2000
20 17 421 5000
650 20 8 180 2150
20 16.5 565 6650
750 25 11.5 227 2700
25 20.5 675 8000
kg/h Delivery
pressure
bar
Return
pressure
bar
kg/h kW
375 20 12 147 1750
20 18.5 295 3500
550 20 7 170 2000
20 16 421 5000
650 20 6 180 2150
20 17 565 6650
750 25 17 227 2700
25 22 675 8000