Riello RLS 310/M MX Instruction Manual

Installation, use and maintenance instructions
20084880 (4) - 12/2015
Dual fuel light oil/gas burners
Modulating operation
CODE MODEL TYPE
20087647 - 20087648
20087651 RLS 310/M MX 1161T
20076483
20087649 - 20087650 RLS 410/M MX 1162T
20087652 RLS 510/M MX 1163T
20087653 RLS 610/M MX 1164T
GB

Original instructions

1 20084880
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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.......................................................................................................................................................... 8
4.3 Burner categories - Countries of destination ............................................................................................................... 8
4.4 Technical data ............................................................................................................................................................. 9
4.5 Electrical data............................................................................................................................................................ 10
4.6 Burner weight ............................................................................................................................................................ 11
4.7 Maximum dimensions................................................................................................................................................ 11
4.8 Firing rates ................................................................................................................................................................ 12
4.9 Test boiler.................................................................................................................................................................. 13
4.10 Burner equipment...................................................................................................................................................... 13
4.11 Burner description ..................................................................................................................................................... 14
4.12 Electrical panel description........................................................................................................................................ 15
4.13 Control box LFL......................................................................................................................................................... 16
4.14 Servomotor SQM40 .................................................................................................................................................. 17
4.15 Calibration of the thermal relay ................................................................................................................................. 17
5 Installation ................................................................................................................................................................................ 18
5.1 Notes on safety for the installation ............................................................................................................................ 18
5.2 Handling .................................................................................................................................................................... 18
5.3 Preliminary checks .................................................................................................................................................... 18
5.4 Operating position ..................................................................................................................................................... 19
5.5 Preparing the boiler ................................................................................................................................................... 19
5.5.1 Boring the boiler plate ............................................................................................................................................... 19
5.5.2 Blast tube length........................................................................................................................................................ 19
5.6 Securing the burner to the boiler............................................................................................................................... 19
5.7 Access to head internal part...................................................................................................................................... 20
5.8 Position of the electrodes and central gas nozzles ................................................................................................... 20
5.9 Gas butterfly valve..................................................................................................................................................... 21
5.10 Combustion head adjustment.................................................................................................................................... 21
5.11 Nozzle installation ..................................................................................................................................................... 22
5.11.1 Recommended nozzle............................................................................................................................................... 22
5.12 Light oil supply........................................................................................................................................................... 23
5.12.1 Double-pipe circuit..................................................................................................................................................... 23
5.12.2 The loop circuit.......................................................................................................................................................... 23
5.12.3 Hydraulic connections ............................................................................................................................................... 23
5.12.4 Hydraulic circuit diagram ........................................................................................................................................... 24
5.12.5 Priming pump ............................................................................................................................................................ 24
5.13 Gas feeding ............................................................................................................................................................... 25
5.13.1 Gas feeding line ........................................................................................................................................................ 25
5.13.2 Gas train.................................................................................................................................................................... 26
5.13.3 Gas train installation.................................................................................................................................................. 26
5.13.4 Gas pressure............................................................................................................................................................. 27

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Contents
5.14 Electrical wiring ..........................................................................................................................................................28
5.14.1 Supply cables and external connections passage .....................................................................................................28
6 Start-up, calibration and operation of the burner ..................................................................................................................29
6.1 Notes on safety for the first start-up...........................................................................................................................29
6.2 Servomotor adjustment..............................................................................................................................................29
6.3 Adjustments prior to ignition (light oil) ........................................................................................................................29
6.3.1 Nozzle ........................................................................................................................................................................29
6.3.2 Combustion head.......................................................................................................................................................29
6.3.3 Pump pressure...........................................................................................................................................................29
6.3.4 Fan damper................................................................................................................................................................29
6.4 Burner start-up (light oil) ............................................................................................................................................30
6.5 Burner ignition (light oil) .............................................................................................................................................30
6.6 Pressure variator........................................................................................................................................................31
6.6.1 Light oil burner calibration procedure.........................................................................................................................32
6.6.2 Maximum output (light oil)..........................................................................................................................................32
6.6.3 Minimum output (light oil)...........................................................................................................................................32
6.6.4 Intermediate outputs ..................................................................................................................................................32
6.7 Change of fuel............................................................................................................................................................32
6.8 Adjustments prior to ignition (gas) .............................................................................................................................33
6.9 Burner ignition (gas)...................................................................................................................................................33
6.10 Proceed with the calibration (gas)..............................................................................................................................34
6.10.1 Burner adjustment......................................................................................................................................................34
6.10.2 Output upon ignition...................................................................................................................................................34
6.10.3 Maximum output ........................................................................................................................................................34
6.10.4 Minimum output .........................................................................................................................................................35
6.10.5 Intermediate outputs ..................................................................................................................................................36
6.11 Pressure switch adjustment .......................................................................................................................................37
6.11.1 Air pressure switch - check CO..................................................................................................................................37
6.11.2 Maximum gas pressure switch...................................................................................................................................37
6.11.3 Minimum gas pressure switch....................................................................................................................................37
6.11.4 Minimum oil pressure switch......................................................................................................................................37
6.11.5 Maximum oil pressure switch.....................................................................................................................................37
6.12 Operation sequence of the burner (gas) ....................................................................................................................38
6.12.1 Burner start-up ...........................................................................................................................................................38
6.12.2 Operation ...................................................................................................................................................................38
6.12.3 Burner flame goes out during operation.....................................................................................................................38
6.12.4 Ignition failure.............................................................................................................................................................38
6.12.5 Control box reset........................................................................................................................................................38
6.13 Operation sequence of the burner (light oil)...............................................................................................................39
6.13.1 Burner start-up ...........................................................................................................................................................39
6.13.2 Operation ...................................................................................................................................................................39
6.13.3 Burner flame goes out during operation.....................................................................................................................39
6.13.4 Ignition failure.............................................................................................................................................................39
6.13.5 Control box reset........................................................................................................................................................39
6.14 Final checks (with burner operating)..........................................................................................................................40
7 Maintenance ..............................................................................................................................................................................41
7.1 Notes on safety for the maintenance .........................................................................................................................41
7.2 Maintenance programme ...........................................................................................................................................41
7.2.1 Maintenance frequency..............................................................................................................................................41
7.2.2 Checking and cleaning...............................................................................................................................................41
7.3 Opening the burner ....................................................................................................................................................43
7.4 Closing the burner......................................................................................................................................................43
8 Faults - Possible causes - Solutions.......................................................................................................................................44
A Appendix - Accessories ...........................................................................................................................................................50
B Appendix - Electrical panel layout...........................................................................................................................................51

3 20084880
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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)
Product: Forced draught gas burners
Model and type: RLS 310/M MX
RLS 410/M MX
RLS 510/M MX
RLS 610/M MX
1161T
1162T
1163T
1164T
These products are in compliance with the following Technical Standards:
EN 676
EN 12100
and according to the European Directives:
GAD 2009/142/EC Gas Devices Directive
MD 2006/42/EC Machine Directive
LVD 2014/35/UE Low Voltage Directive
EMC 2014/30/UE Electromagnetic Compatibility
The products are marked as follows: RLS 310/M MX (Class 2 EN 267 - Class 3 EN676)
RLS 410/M MX (Class 2 EN 267 - Class 3 EN676)
RLS 510/M MX (Class 2 EN 267 - Class 3 EN676)
RLS 610/M MX (Class 2 EN 267 - Class 3 EN676)
The quality is guaranteed by a quality and management system certified in accordance with UNI EN ISO 9001.
Manufacturer's Declaration
RIELLO S.p.A. declares that the following products comply with the NOx emission limits specified by German standard “1. BIm-
SchV revision 26.01.2010”.
Product Model Type Output
Forced draught gas burners RLS 310/M MX 1161T 600 - 3600 kW
RLS 410/M MX 1162T 640 - 4200 kW
RLS 510/M MX 1163T 660 - 5170 kW
RLS 610/M MX 1164T 1000 - 6155 kW
Legnago, 21.05.2015 Executive General Manager
RIELLO S.p.A. - Burner Department Research & Development Director RIELLO S.p.A. - Burner Department
Mr. U. Ferretti Mr. F. Comencini
0085CQ0196

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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 Ser-
vice 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 car-
ried out correctly, cause serious injury, death or
long-term health risks.
WARNING
This symbol indicates operations which, if not car-
ried out correctly, may cause serious injury, death
or long-term health risks.
CAUTION
This symbol indicates operations which, if not car-
ried out correctly, may cause damage to the ma-
chine and/or injury to people.
DANGER
DANGER: LIVE COMPONENTS
This symbol indicates operations which, if not car-
ried out correctly, lead to electric shocks with le-
thal 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 at-
mosphere may be present. An explosive atmos-
phere 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 20084880
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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 Assis-
tance 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 recom-
mends 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, incor-
rectly 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 estab-
lished 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 re-
sponsibility for the failure to observe the contents of this
manual.
.........................................................................................
.........................................................................................
.........................................................................................
.........................................................................................
WARNING
Failure to observe the information given in this
manual, operating negligence, incorrect installa-
tion and carrying out of non authorised modifica-
tions will result in the annulment by the
manufacturer of the guarantee that it supplies with
the burner.

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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
rules of safety 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 confi-
dence 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 dan-
gerous.
In particular:
it can be applied to boilers operating with water, steam, diather-
mic oil, and to other uses expressly foreseen by the manufactur-
er;
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 cham-
ber and the room temperature must all be within the values indi-
cated in the instruction manual.
Modification of the burner to alter its performance and desti-
nations is not allowed.
The burner must be used in exemplary technical safety con-
ditions. 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 re-
sponsible for the machine and for the training of the people work-
ing 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 follow all the danger and caution indications
shown on the machine.
Personnel must not carry out, on their own initiative, opera-
tions or interventions that are not within their province.
Personnel are obliged to 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 com-
promise operating safety. The manufacturing company
therefore accepts no responsibility whatsoever for any which
may result from the use of non-original parts.
In addition:
3 Safety and prevention
WARNING
The manufacturer guarantees safety and proper
functioning only if all burner components are intact
and positioned correctly.
must take all the measures necessary to pre-
vent unauthorised people gaining access to
the machine;
the user must inform the manufacturer if
faults or malfunctioning of the accident pre-
vention systems are noticed, along with any
presumed danger situation;
personnel must always use the personal pro-
tective equipment envisaged by legislation
and follow the indications given in this man-
ual.

7 20084880
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Technical description of the burner
4.1 Burner designation
4 Technical description of the burner
Range: R
Size
Fuel: Natural gas
Gas oil
Light oil / Methane
Adjustment:
Flame control system:
FS1
FS2
Standard (1 stop every 24 h)
Continuous operation (1 stop every 72 h)
Electrical supply of the system:
3/400/50
3/230/50
Voltage of auxiliaries:
230/50/60
110/50/60
RLS 310 MTC FS1 3/400/50 230/50/60
BASIC DESIGNATION
EXTENDED DESIGNATION
MX
3N / 400V / 50Hz
3 / 230V / 50Hz
230V / 50-60Hz
110V / 50-60Hz
Heavy oil
E Electronic cam
EV Electronic cam with 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 Long head
Emission: C01 - ...
C02 - MZ
C03 - BLU
C03 - MX
Class 1 EN676
Class 2 EN676
Class 3 EN676
Class 3 EN676
Class 2 EN267 - Class 3 EN676
C23 or MX
C13 Class 1 EN267 - Class 3 EN676

20084880 8
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Technical description of the burner
4.2 Models available
Tab. A
4.3 Burner categories - Countries of destination
Tab. B
Designation Voltage Start-up Code
RLS 310/M MX
3/400/50 Star/Triangle 20087651
3/230/50 Direct 20087647
3/400/50 Direct 20087648
RLS 410/M MX
3/400/50 Star/Triangle 20076483
3/230/50 Direct 20087649
3/400/50 Direct 20087650
RLS 510/M MX 3/400/50 Star/Triangle 20087652
RLS 610/M MX 3/400/50 Star/Triangle 20087653
Gas category Destination country
I2H SE - FI - AT - GR - DK - ES - GB - IT - IE - PT - IS - CH - NO
I2ELL DE
I2L NL
I2Er FR
I2E(R)B BE
I2E LU - PL

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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 on the socket 5) (Fig. 5) with zero pressure in the 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 rated output. The sound
power is measured with the “Free Field” method, as per EN 15036, and according to an accurate “Accuracy: Category 3”, as described by EN ISO
3746”.
Model RLS 310/M MX RLS 410/M MX RLS 510/M MX RLS 610/M MX
Type 1161T 1162T 1163T 1164T
Power(1)
Delivery (1)
min - max kW
Kg/h
600/1200 - 3600
50/100- 305
640/1500 - 4200
55/126- 352
660/1800 - 5170
56/195- 435
1000/2200 - 6155
110/185- 516
Fuels Natural gas: G20 (methane gas) - G21 - G22 - G23 - G25
Light oil, max. viscosity at 20 °C: 6 mm2/s (1.5°E - 6 cSt)
Gas pressure at max. output (2)
Gas: G20/G25 mbar 31.8/47.4 47.3/70.6 47.8/71.3 68.2/101.8
Operation FS1: Intermittent (min. 1 stop in 24 hours)
Pump
Minimum output at 16.5 bar
Pressure range
kg/h
bar
TA 3
700
7/40
TA 4
930
7/40
TA 5
1270
7/30
Fuel temperature °c max 140
Nozzles number 1
Standard applications Boilers: water, steam, diathermic oil
Ambient temperature °C 0 - 40
Combustion air temperature °C max 60
Noise level (3)
Sound pressure
Sound power
dB(A) 78
89
80
91
82.5
93.5
85
96

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Technical description of the burner
4.5 Electrical data
Tab. D
Tab. E
DIRECT START UP
Model RLS 310/M MX RLS 410/M MX RLS 310/M MX RLS 410/M MX
Main electrical supply 3 ~ 230V +/-10% 50 Hz 3N ~ 400V +/-10% 50 Hz
Fan motor IE2
rpm
V
kW
A
2900
230/400
7.5
23.9 - 13.8
2920
230/400
9.2
29.3- 16.9
2900
230/400
7.5
23.9 - 13.8
2920
230/400
9.2
29.3 - 16.9
Ignition transformer V1 - V2
I1 - I2
230 V - 2 x 5 kV
1.9 A - 35 mA
Absorbed electrical power
Gas
Light oil
kW max 9.1
10.9
10.8
12.6
9.1
10.9
10.8
12.6
Protection level IP 54
STAR - TRIANGLE START UP
Model RLS 310/M MX RLS 410/M MX RLS 510/M MX RLS 610/M MX
Main electrical supply 3N ~ 400V +/-10% 50 Hz
Fan motor IE2
rpm
V
kW
A
2900
400/690
7.5
13.8 - 8
2920
400/690
9.2
16.9 - 9.7
2880
400/690
12
21.2 - 12.2
2920
400/690
15
27 - 15.6
Pump motor rpm
V
kW
A
2870
220 - 380
1.5
5.9 - 3.4
Ignition transformer V1 - V2
I1 - I2
230 V - 2 x 5 kV
1.9 A - 35 mA
Absorbed electrical power
Gas
Light oil
kW max 9.1
10.9
10.8
12.6
14
15.8
17
18.8
Protection level IP 54
DIRECT START UP
Model RLS 310/M MX RLS 410/M MX RLS 310/M MX RLS 410/M MX
Main electrical supply 3 ~ 230V +/-10% 50 Hz 3 ~ 400V +/-10% 50 Hz
Fan motor IE3
rpm
V
kW
A
2900
230/400
7.5
24 - 14
2920
230/400
9.2
28.6 - 16.5
2900
230/400
7.5
24 - 14
2920
230/400
9.2
28.6 - 16.5
Absorbed electrical power
Gas
Light oil
kW max 9.1
10.9
10.6
12.4
9.1
10.9
10.6
12.4
STAR - TRIANGLE START UP
Model RLS 310/M MX RLS 410/M MX RLS 510/M MX RLS 610/M MX
Main electrical supply 3 ~ 400V +/-10% 50 Hz
Fan motor IE3
rpm
V
kW
A
2920
400/690
7.5
14 - 8.1
2880
400/690
9.2
16.8 - 9.7
2880
400/690
12
21.8 - 12.6
2880
400/690
15
27 - 15.6
Absorbed electrical power
Gas
Light oil
kW max 8.8
10.6
10.6
12.4
13.9
15.7
16.9
18.7

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Technical description of the burner
4.6 Burner weight
The weight of the burner complete with its packaging is shown in
Ta b. F .
Tab. F
4.7 Maximum dimensions
The maximum dimensions of the burner are given in Fig. 2.
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. G
Model kg
RLS 310/M MX 300
RLS 410/M MX 300
RLS 510/M MX 300
RLS 610/M MX 320
Fig. 1
20085294
WARNING
* The gas adaptor is set also for DN 80 bore.
Fig. 2
20085288
mm ABCDEF* G H I L M N O R
RLS 310/M MX 1190 507 178 313 520 DN65 490 790 340 1015 576 528 290 890
RLS 410/M MX 1190 507 178 313 520 DN65 508 790 340 1015 576 528 290 890
RLS 510/M MX 1190 507 178 313 520 DN65 508 790 340 1015 576 528 290 890
RLS 610/M MX 1190 510 178 334 520 DN65 580 790 360 1015 576 528 290 890

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Technical description of the burner
4.8 Firing rates
The MAXIMUM OUTPUT is chosen from within the diagram area
(Fig. 3).
The MINIMUM OUTPUT must not be lower than the minimum
limit of the diagram:
Tab. H
Model kW
RLS 310/M MX 600
RLS 410/M MX 640
RLS 510/M MX 660
RLS 610/M MX Gas 1000
RLS 610/M MX Light oil 1300
WARNING
The firing rate value (Fig. 3) 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 21.
WARNING
Pre-calibration of the combustion head only for
the burner model RLS 310/M MX:
If the maximum burner output of the burner falls
within:
- area A of the firing rate, it is necessary to replace
the gas nozzles with those supplied (No. 8 gas
nozzles Ø 5.3), Fig. 15.
- area B of the firing rate, no modifications are re-
quired.
Pressure in
combustion head - mbar
20096600
Pressure in
combustion head - mbar
Thermal power – kW
Thermal power – kW
RLS 310/M MX
RLS 410/M MX
RLS 510/M MX
Firing rate light oil - RLS 610/M MX
RLS 610/M MX
Fig. 3

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Technical description of the burner
4.9 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. 4).
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, consult the manufac-
turer.
The firing rates were set in relation to special test boilers, accord-
ing to EN 676 regulations.
In Fig. 4 you can see the diameter and length of the test combus-
tion chamber.
Example: RLS 510/M MX
Output 5000 kW - diameter 100 cm - length 5 m
4.10 Burner equipment
Gasket for gas train adaptor. . . . . . . . . . . . . . . . . . . . . . . . No. 1
Adaptor for gas train. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
Screws for fixing the gas train adaptor: M 16 x 70 . . . . . . . No. 4
Thermal insulation screen . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
M 18 x 60 screws to secure the burner flange
to the boiler. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 4
Flexible hoses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 2
Hydraulic fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 2
Cable grommets kit for optional electrical wiring input . . . . No. 1
M16 x 6 studs for fixing the gas elbow
to the pipe coupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 4
M16 nuts to fix the gas elbow to the pipe coupling. . . . . . . No. 4
Gas nozzles (only for version RLS 310/M MX). . . . . . . . . . No. 8
Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
Spare parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
Fig. 4
20057548
Combustion chamber
m

20084880 14
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Technical description of the burner
4.11 Burner description
1 Lifting rings
2Fan
3 Fan motor
4 Air/gas servomotor
5 Combustion head gas pressure test point
6 Combustion head
7 Ignition electrodes
8 Flame stability disk
9 Electrical panel casing
10 Hinge for opening the burner
11 Fan air inlet
12 Pipe coupling
13 Gasket for boiler fixing
14 Gas butterfly valve
15 Shutter
16 Combustion head movement screw
17 Air damper control lever
18 Air pressure switch
19 Oil modulator
20 Maximum gas pressure switch with pressure test point
21 Valve group
22 Pressure test point for air pressure switch “+”
23 Gas train adapter
24 Gas butterfly valve control lever
25 Indication for checking the rotation direction of the purging
motor
26 Flame inspection window
27 UV sensor (QRI cell)
28 Reset button
29 Transparent protection
30 Variable profile cam (air)
31 Variable profile cam (gas)
32 Combustion head air pressure test point
33 Pump
34 Pump motor
35 Minimum oil pressure switch
36 Maximum oil pressure switch
37 Nozzle return pressure gauge
38 Nozzle delivery pressure gauge
Fig. 5
20086727
The burner can be opened to the right or to the left
without links to the fuel supply side.
WARNING
To open the burner see section “Access to head
internal part” on page 20.

15 20084880
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Technical description of the burner
4.12 Electrical panel description
1 Ignition transformer
2 Burner state indicator light and reset button.
3 OFF-automatic-manual selector
4 Electrical control box
5 Power increase - power reduction selector
6 Earth terminal
7 Air pressure switch
8 Bracket for applying the kits
9 Relay with clean contacts for signalling the burner is in lock-
out and that the burner is operating
10 Oil enable relay
11 Oil enable relay
12 Timer for star/triangle start up
13 Main terminal supply board
14 Supply cables and external connections passage. See sec-
tion “Electrical wiring” on page 28
15 Valve group terminal board
16 Auxiliary circuits fuse (includes a spare fuse)
17 Pump motor contact maker
18 Direct start up line contactor
19 Fan motor thermal relay (with reset button)
20 Triangle contactor (Star/triangle start up)
Star contactor (Star/triangle start up)
21 Pump motor thermal relay
22 Auxiliary contacts (Star/triangle start up)
23 Fuel selector
24 Star/triangle start-up line contactor
25 Fan motor cables sheath
26 Flame sensor sheath
27 Servomotor sheath
28 Maximum gas pressure switch sheath
29 Safety valve sheath (VS1)
30 Return line valve sheath (VR)
31 Working valve sheath (VF)
32 Safety valve sheath (VS)
33 Maximum oil pressure switch sheath
34 Minimum oil pressure switch sheath
35 Pump motor cables sheath
1
2
3
4
5
6
6
7
8
13
14
23
12
17
20
21
22
19
24
17
18
19
21
16
614
6
15
16
9
10
11
27
26
25
28 29 30 31
32
33
34
35
Fig. 6
20095671
20096238

20084880 16
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Technical description of the burner
4.13 Control box LFL
Warnings
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). Check the system is not powered
and cannot be accidentally reconnected. Failure to do this
will lead to the risk of electrocution.
Protection against electrocution from the control box and all
connected electric components is obtained with the correct
assembly.
Before any intervention (assembly and installation opera-
tions, 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 func-
tions.
In this case, the control box must not be operated, even if it
displays no evident damage.
Press the reset button of the burner lockout command or the
reset button (by applying a force of not more than 10 N),
without the aid of tools or sharp objects. Do not keep the but-
ton pressed for more than 10 seconds since it would dam-
age the internal relay.
For the safety and reliability of the control box, comply with the
following instructions:
– avoid conditions that can favour the development of conden-
sate 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.
Technical data
Mechanical structure
The control box is made of plastic to resist knocks, heat and
flame propagation.
The electronic flame signal amplifier is integrated into the control
box.
WARNING
To avoid accidents, material or environmental
damage, observe the following instructions!
The control box LFL is a safety device! Avoid
opening or modifying it, or forcing its operation. Ri-
ello S.p.A. cannot assume any responsibility for
damage resulting from unauthorised interven-
tions!
Mains voltage AC 230 V +15 % / -15 %
Mains frequency 50 / 60 Hz ±6%
Fuse (Internal) T6.3H250V
Primary fuse
(external)
max. 10 A
Weight approx. 1 kg
Power absorption approx. AC 3.5 VA
Protection level IP40
Safety class II
Input current at terminal 1 max. 5 A continuous
(peaks of 20 A / 20 ms)
Load on the control termi-
nals
Max. 4 A continuous
(peaks of 20 A / 20 ms)
Environmental conditions:
Operation
Climatic conditions
Mechanical conditions
Temperature range
Humidity
DIN EN 60721-3-1
Class 1K3
Class 1M2
-20...+60°C
< 95 % r.h.
Fig. 7
S8986

17 20084880
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Technical description of the burner
4.14 Servomotor SQM40 ...
Warnings
All interventions (assembly and installation operations,
assistance, etc.) must be carried out by qualified personnel.
Falls and collisions can negatively affect the safety func-
tions. In this case, the servomotor must not be operated,
even if it displays no evident damage.
Fully disconnect the burner from the mains when working
near terminals and servomotor connections.
Condensation and exposure to water are not allowed.
For safety reasons, the servomotor must be checked after
long periods of non-use.
Technical data
Tab. I
4.15 Calibration of the thermal relay
The thermal relay serves to avoid damage to the motor due to an
excessive absorption increase or if a phase is missing.
For calibration 2), see the table in the wiring diagram.
To reset, in case of an intervention of the thermal relay, press the
“RESET” button 1) of Fig. 9.
The red “TEST” button 3) opens the NC (95-96) contact and
stops the motor.
WARNING
To avoid accidents, material or environmental
damage, observe the following instructions!
Avoid opening, modifying or forcing the servomo-
tor.
Fig. 8
S8907
Mains voltage 230 V -15% +10%
Mains frequency 50 / 60 Hz
Power absorption 7 ... 15 VA
Motor Synchronous
Drive angle Varying between 0° and 135°
WARNING
Never adjust the red cam No. 1 more than 135° to
prevent serious or irreversible damage to the me-
chanical adjustment parts.
Protection level Max. IP 66, with appropriate
cable entry
Cable entry 2 x M16
Cable connection terminal board for 0.5mm2 (min.)
and 2.5mm2 (max.)
Rotation direction Anticlockwise
Rated torque (max.) 10 Nm
Holding torque 5 Nm
Operation time 30 s. at 90°
Weight approx. 2 kg
Environmental conditions:
Operation
Transport and storage
-20....+60° C
-20...+60°C
CAUTION
The automatic reset can be dangerous. This oper-
ation is not foreseen in the burner operation.
Therefore do not position the “RESET” button
1) on “A”.
3
1
2
RESET
HA
TEST
95 96 97 98
Fig. 9
20073932

20084880 18
GB
Installation
5.1 Notes on safety for the installation
After carefully cleaning all around the area where the burner will
be installed, and arranging the correct lighting of the environ-
ment, proceed with the installation operations.
5.2 Handling
The burner packaging includes a wooden platform, it is therefore
possible to move the burner (still packaged) with a transpallet
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. 10) 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 pos-
sibilities (H) (see Firing rate)
Warning. The burner output must be within the boiler's firing
rate;
the category of the appliance/countries of destination (I).
5Installation
DANGER
All the installation, maintenance and disassembly
operations must be carried out with the electricity
supply disconnected.
WARNING
The installation of the burner must be carried out
by qualified personnel, as indicated in this manual
and in compliance with the standards and regula-
tions of the laws in force.
DANGER
Combustion air inside the boiler must be free from
hazardous mixes (e.g.: chloride, fluoride, halo-
gen); if present, it is highly recommended to carry
out cleaning and maintenance more frequently.
WARNING
The handling operations for the burner can be
highly dangerous if not carried out with the great-
est attention: keep any unauthorised people at a
distance; check the integrity and suitableness of
the available means of handling.
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 quick-
ly move if the burner should fall).
When handling, keep the load at not 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 burn-
er will be installed.
CAUTION
After removing all the packaging, check the integ-
rity of the contents. In the event of doubt, do not
use the burner; contact the supplier.
The packaging elements (wooden cage or card-
board 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.
WARNING
A burner label, or any other component, that has
been tampered with, removed or is missing, pre-
vents the definite identification of the burner and
makes any installation or maintenance work diffi-
cult.
R.B.L.
GAS- KAASU
GAZ- AEPIO
X
RIELLO S.p.A.
I-37045 Legnago (VR)
A
DE
BC
F
I
G H
G H
Fig. 10
D10411