Riello RS 70/M Quick start guide

Installation, use and maintenance instructions
20195916 (1) - 01/2022
Forced draught gas burners
Progressive two-stage or modulating operation
CODE MODEL
20195818 RS 70/M
20195847 RS 100/M
20195849 RS 130/M
GB

Translation of the original instructions

1 20195916
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Contents
1 Information and general warnings............................................................................................................................................ 3
1.1 Information about the instruction manual .................................................................................................................... 3
1.1.1 Introduction.................................................................................................................................................................. 3
1.1.2 General dangers.......................................................................................................................................................... 3
1.1.3 Other symbols ............................................................................................................................................................. 3
1.1.4 Delivery of the system and the instruction manual...................................................................................................... 4
1.2 Guarantee and responsibility....................................................................................................................................... 4
2 Safety and prevention................................................................................................................................................................ 5
2.1 Introduction.................................................................................................................................................................. 5
2.2 Personnel training ....................................................................................................................................................... 5
3 Technical description of the burner ......................................................................................................................................... 6
3.1 Burner designation ...................................................................................................................................................... 6
3.2 Models available.......................................................................................................................................................... 6
3.3 Technical data ............................................................................................................................................................. 7
3.4 Electrical data.............................................................................................................................................................. 7
3.5 Maximum dimensions.................................................................................................................................................. 8
3.6 Burner equipment........................................................................................................................................................ 8
3.7 Firing rates .................................................................................................................................................................. 9
3.8 Test boiler.................................................................................................................................................................... 9
3.9 Burner description ..................................................................................................................................................... 10
3.10 Electrical panel description........................................................................................................................................ 11
3.11 Control box RMG88................................................................................................................................................... 12
3.12 Servomotor (SQN31...).............................................................................................................................................. 13
4 Installation ................................................................................................................................................................................ 14
4.1 Notes on safety for the installation ............................................................................................................................ 14
4.2 Handling .................................................................................................................................................................... 14
4.3 Preliminary checks .................................................................................................................................................... 14
4.4 Operating position ..................................................................................................................................................... 15
4.5 Opening the burner ................................................................................................................................................... 15
4.6 Preparing the boiler ................................................................................................................................................... 15
4.6.1 Boring the boiler plate ............................................................................................................................................... 15
4.6.2 Blast tube length........................................................................................................................................................ 15
4.7 Securing the burner to the boiler............................................................................................................................... 16
4.8 Calibration of the thermal relay ................................................................................................................................. 16
4.9 Motor rotation ............................................................................................................................................................ 16
4.10 Positioning the probe - electrode............................................................................................................................... 17
4.11 Combustion head adjustment.................................................................................................................................... 18
4.12 Closing the burner ..................................................................................................................................................... 19
4.13 Gas supply ................................................................................................................................................................ 20
4.13.1 Gas feeding line ........................................................................................................................................................ 20
4.13.2 Gas train.................................................................................................................................................................... 21
4.13.3 Gas train installation.................................................................................................................................................. 21
4.13.4 Gas pressure............................................................................................................................................................. 21
4.14 Electrical wiring ......................................................................................................................................................... 23
4.14.1 Supply cables and external connections passage .................................................................................................... 23
5 Start-up, calibration and operation of the burner ................................................................................................................. 24
5.1 Notes on safety for the first start-up .......................................................................................................................... 24
5.2 Adjustments prior to ignition ...................................................................................................................................... 24
5.3 Servomotor adjustment ............................................................................................................................................. 24
5.4 Burner start-up .......................................................................................................................................................... 25
5.5 Burner ignition ........................................................................................................................................................... 25
5.5.1 Burner adjustment ..................................................................................................................................................... 25

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Contents
5.5.2 Ignition output ............................................................................................................................................................25
5.5.3 Maximum output ........................................................................................................................................................25
5.5.4 Minimum output .........................................................................................................................................................26
5.5.5 Intermediate outputs ..................................................................................................................................................26
5.6 Pressure switch adjustment .......................................................................................................................................27
5.6.1 Air pressure switch.....................................................................................................................................................27
5.6.2 Maximum gas pressure switch...................................................................................................................................27
5.6.3 Minimum gas pressure switch....................................................................................................................................27
5.7 Measuring the ionisation current................................................................................................................................28
5.8 Burner operation ........................................................................................................................................................29
5.8.1 Burner start-up ...........................................................................................................................................................29
5.8.2 Steady state operation ...............................................................................................................................................29
5.8.3 Ignition failure.............................................................................................................................................................29
6 Maintenance ..............................................................................................................................................................................30
6.1 Notes on safety for the maintenance .........................................................................................................................30
6.2 Maintenance programme ...........................................................................................................................................30
6.2.1 Maintenance frequency..............................................................................................................................................30
6.2.2 Safety test - with no gas supply .................................................................................................................................30
6.2.3 Checking and cleaning...............................................................................................................................................30
6.2.4 Safety components ....................................................................................................................................................31
7 LED indicator and special function.........................................................................................................................................32
A Appendix - Accessories ...........................................................................................................................................................34
B Appendix - Electrical panel layout...........................................................................................................................................35

3 20195916
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Information and general warnings
1.1 Information about the instruction manual
1.1.1 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.
1.1.2 General dangers
The dangers can be of 3 levels, as indicated below.
1.1.3 Other symbols
Abbreviations used
Ch. Chapter
Fig. Figure
Page Page
Sec. Section
Table Table
1 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.

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Information and general warnings
1.1.4 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.
1.2 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.

5 20195916
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Safety and prevention
2.1 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.
2.2 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:
2 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.

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Technical description of the burner
3.1 Burner designation
3.2 Models available
Tab. A
3 Technical description of the burner
Series: R
Size
Fuel: Natural gas
Light oil
Light oil / Methane
Adjustment:
Flame control system:
FS1
FS2
Standard (1 stop every 24 h)
Continuous operation only with flame detection
Electrical supply of the system:
3/400/50
3/380/60
Voltage of auxiliaries:
230/50
220/60
R S 70 MTC FS1 3/400/50 230/50
BASIC DESIGNATION
EXTENDED DESIGNATION
3 N / 400 V / 50 Hz
3 N / 380 V / 60 Hz
230 V / 50 Hz
220 V / 60 Hz
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
Emission: C01 - ...
C02 - MZ
C03 - BLU
C03 - MX
Class 1 EN676
Class 2 EN676
Class 3 EN676
Class 3 EN676
electrode (ionisation)
Designation Voltage Start-up Code
RS 70/M 3 ~ 400/230 V - 50 Hz Direct 20195818
RS 100/M 3 ~ 400/230 V - 50 Hz Direct 20195847
RS 130/M 3 ~ 400/230 V - 50 Hz Direct 20195849

7 20195916
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Technical description of the burner
3.3 Technical data
Tab. B
(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 11)(Fig. 4 on page 10) 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.
3.4 Electrical data
Tab. C
Model RS 70/M RS 100/M RS 130/M
Output (1) maximum kW
Mcal/h
470 - 930
404 - 800
700 - 1340
602 - 1152
920 - 1600
791 - 1376
minimum kW
Mcal/h
150
129
150
129
254
218
Fuel Natural gas: G20 - G25
Gas pressure at max. output (2) -
Gas: G20/G25 mbar 12.9/17.9 11.4/17.1 11.5/16.7
Operation Intermittent (min. 1 stop in 24 hours)
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 dBA 75
86
77
88
78.5
89.5
Model RS 70/M RS 100/M RS 130/M
Main electrical supply 3 ~ 400V / 230 V 1N ~ 230V +/-10% 50 Hz
Fan motor IE3 rpm
V
kW
A
2880
220/240 - 380/415
1.1
4.3 - 2.5
2890
220/240 - 380/415
1.5
5.9 - 3.4
2890
220/240 - 380/415
2.2
8 - 4.6
Ignition transformer V1 - V2
I1 - I2
230V - 1 x 8 kV
1A - 20mA
Absorbed electrical power kW max 1.4 1.8 2.6
Protection level IP 44

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Technical description of the burner
3.5 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
values U.
Tab. D
(1) Blast tube: short-long
3.6 Burner equipment
Flange for gas train . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
Gasket for gas train . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
Flange fixing screws M8x25. . . . . . . . . . . . . . . . . . . . . . . . No. 4
Screws M12x35 to fix the burner flange to the boiler . . . . . No. 4
Thermal flange gasket . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
Instruction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
Spare parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
BT-T(1)
D
E
N
F
P
C
L
MG
H
U-U(1)
Fig. 1
20152197
mm BCDEFGHLMNP T-T
(1) U-U(1)
RS 70/M 212 131 179 425 2” 295 550 511 216 220 837 250-385 1221-1356
RS 100/M 212 131 179 425 2” 312 550 528 216 220 837 250-385 1221-1356
RS 130/M 212 131 189 425 2” 337 550 553 216 220 837 280-415 1221-1356

9 20195916
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Technical description of the burner
3.7 Firing rates
The MAXIMUM OUTPUT must be selected within area A.(Fig. 2).
The MINIMUM OUTPUT must not be lower than the minimum
limit of the diagram.
3.8 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, 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 756 kW (650 Mcal/h) - diameter 60 cm - length 2 m
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 18.
Fig. 2
D9123
RS 100/MRS 70/M
RS 130/M
Pressure in combustion
chamber - mbar
Pressure in combustion
chamber - mbar
Pressure in combustion
chamber - mbar
Thermal power Thermal power
Thermal power
Fig. 3
D715
Combustion chamber
m

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Technical description of the burner
3.9 Burner description
1 Combustion head
2 Ignition electrode
3 Screw for combustion head adjustment
4 Maximum gas pressure switch
5 Pipe coupling
6 Servomotor controlling the gas butterfly valve and the air
damper, by means of a variable profile cam mechanism.
When the burner is not operating the air damper is fully
closed in order to reduce heat dispersion from the boiler due
to the flue draught, which draws air from the fan suction inlet
7Fanmotor
8 Electrical control box with lockout pilot light and reset button
9 Flame inspection window
10 Slide bars for opening the burner and inspecting the
combustion head
11 Gas pressure test point and head fixing screw
12 Air pressure test point
13 Flame sensor probe
14 Air damper
15 Air inlet to fan
16 Screws to secure fan to pipe coupling
17 Gas input pipe
18 Gas butterfly valve
19 Boiler fixing flange
20 Flame stability disc
19
20
16
18
15
14
89 10 11 12
7 6 5 4 3 1
2
13
Fig. 4
20196225

11 20195916
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Technical description of the burner
3.10 Electrical panel description
1 Plug-socket on ionisation probe cable
2 Motor contactor and thermal relay with reset button
3 Switch for automatic-manual-off operation;
a button for output increase-decrease
4 Main terminal supply board
5 Cable grommets for electrical wiring (to be carried out by the
installer)
6 Minimum air pressure switch (differential type)
7 Ignition transformer
8 Control box base
9 Filter to protect against radio disturbance
10 Dry contact relay
61085
4
9
3271
Fig. 5
20190958

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Technical description of the burner
3.11 Control box RMG88...
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). 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.
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 control box contains the following components:
• a microprocessor that controls the program sequence, and a
relay for controlling the load;
• an electronic flame signal amplifier;
• a built-in reset button with 3 signalling colours (LED) for status
and error messages.
ATTENTION
To avoid accidents, material or environmental
damage, observe the following instructions!
The control box RMG88... is a safety device!
Avoid opening or modifying it, or forcing its opera-
tion. Riello S.p.A. cannot assume any responsibil-
ity for damage resulting from unauthorised
interventions!
Mains voltage AC 220...240 V +10 % / -15 %
Mains frequency 50 / 60 Hz ±6%
Power absorption 20 VA
Protection level IP20
Safety class I
Weight approx. 260g
Cable length
Thermostat cable
Air pressure switch
Gas pressure switch
Remote reset
CPI
Max. 20 m at 100 pF/m
Max. 1 m at 100 pF/m
Max. 20 m at 100 pF/m
Max. 20 m at 100 pF/m
Max. 1 m at 100 pF/m
Environmental conditions:
Operation
Climatic conditions
Mechanical conditions
Temperature range
Humidity
DIN EN 60721-3-3
Class 3K3
Class 3M3
-20...+60°C
< 95 % r.h.
Fig. 6
S8906

13 20195916
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Technical description of the burner
3.12 Servomotor (SQN31...)
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. E
ATTENTION
To avoid accidents, material or environmental
damage, observe the following instructions!
Avoid opening, modifying or forcing the
actuators.
Operating voltage AC 220...240 V - 15% / +10%
AC 100...110 V - 15% / +10%
Mains frequency 50...60 Hz 6%
Angle
positioning up to 160° (full scale)
Assembly position option
Protection level IP 40, in accordance with DIN 40050
Weight approx. 0.8 kg
Actuator motor synchronous motor
Power absorption 6.5 VA
Environmental conditions:
Operation
Climatic conditions
Mechanical conditions
Temperature range
Humidity
DIN EN 60 721-3-3
Class 3K5
Class 3M2
-20...+60°C
< 95% RH
Fig. 7
20160309

20195916 14
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Installation
4.1 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.
4.2 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.
4.3 Preliminary checks
Checking the consignment
Checking the characteristics of the burner
Check the identification label of the burner (Fig. 8), showing:
A the burner model;
B the burner type;
C the cryptographic year of manufacture;
D the serial number;
E the data for electrical supply and the protection level;
F the electrical power consumption;
G the types of gas used and the relative supply pressures;
H the data of the burner's possible minimum and maximum
output (see Firing rate).
Warning:. The burner output must be within the boiler's fir-
ing rate;
I the category of the appliance/countries of destination.
4Installation
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 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.
ATTENTION
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
A B
CD
E F
G
I
I I I I
I I I I
G
G
H
H
H
Fig. 8
20186109

15 20195916
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Installation
4.4 Operating position
4.5 Opening the burner
4.6 Preparing the boiler
4.6.1 Boring the boiler plate
Pierce the closing plate of the combustion chamber, as in Fig. 10.
The position of the threaded holes can be marked using the
thermal insulation screen supplied with the burner.
Tab. F
4.6.2 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.
The available length L (mm) is as follows.
Tab. G
For boilers with front flue passes 15)(Fig. 11), or flame inversion
chamber, a protection in refractory material 13)(Fig. 11) must be
inserted between the boiler fettling 14) and the blast tube
12)(Fig. 11).
This protection must not compromise the extraction of the blast
tube.
For boilers with water-cooled front piece, the refractory protection
13-14)(Fig. 11) is not necessary, unless specifically requested by
the boiler manufacturer.
ATTENTION
The burner is designed to operate only in
positions 1, 2, 3 and 4 (Fig. 9).
Installation 1is preferable, as it is the only
one that allows the maintenance operations
as described in this manual.
Installations 2, 3 and 4 allow operation but
make maintenance and inspection of the
combustion head more difficult.
DANGER
Any other position could compromise the
correct operation of the appliance.
Installation 5is forbidden for safety reasons.
Fig. 9
2 3 4 51
D7739
DANGER
Disconnect the electrical supply from the burner
by means of the system main switch.
DANGER
Close the fuel shut-off valve.
Wait for the components in contact with heat
sources to cool down completely.
mm A B 
RS 70/M 185 275-325 M 12
RS 100/M 185 275-325 M 12
RS 130/M 185 275-325 M 12
Ø
45
45
DF
D1
Fig. 10
20149117
mm RS 70/M RS 100/M RS 130/M
Standard 250 250 280
10
8
7
6
43
11 15
14
13
12
L
15
9
521
100 mm
Fig. 11
D3808

20195916 16
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Installation
4.7 Securing the burner to the boiler
Before securing the burner to the boiler, check (through the
opening of the blast tube) that the probe and electrode are
correctly positioned, as in Fig. 16.
Separate the combustion head from the rest of the burner,
(Fig. 12):
loosen the 4 screws 3) and remove the cover 1).
Disengage the articulated coupling 7) from the graduated
sector 8).
Remove the screws 2) from the two slide bars 5).
Remove the two screws 4) and pull the burner back on slide
bars 5) by about 100 mm.
Disconnect the probe and electrode cables, then completely
unthread the burner from the slide bars.
Fix the flange 11) to the plate of the boiler interposing the
insulating gasket 9) supplied.
Use the 4 screws, also supplied, after protecting their thread
with an anti-locking product.
4.8 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 the calibration, act on the wiper 2)(Fig. 13) by referring to the
wiring diagram.
In case of burner lock-out, due to the thermal relay, press the but-
ton 1)(Fig. 13).
4.9 Motor rotation
As soon as the burner starts, place yourself in front of the cooling
fan of the fan motor and check that it turns anticlockwise
(Fig. 14).
If this is not the case:
put the switch of the burner to “0” (OFF) and wait until the
control box carries out the switching off phase.
Invert the phases on the three-phase motor power supply.
Provide an adequate lifting system of the burner.
ATTENTION
The burner-boiler seal must be hermetic; after
burner start-up check there is no leakage of flue
gases into the external environment.
Fig. 12
10
8
7
6
43
11 15
14
13
12
L
15
9
521
100 mm
D3808
ATTENTION
The automatic reset can be dangerous.
This operation is not foreseen in the burner oper-
ation.
1
2
Fig. 13
20142908
DANGER
Disconnect the electrical supply from the burner
by means of the system main switch.
Fig. 14
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17 20195916
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Installation
4.10 Positioning the probe - electrode
If the probe or electrode is not correctly positioned, you must:
remove the screw 1)(Fig. 15)
take out the inner part 2)(Fig. 15) of the head and then
calibrate them.
ATTENTION
Check that the probe and the electrode are placed
as in Fig. 16, according to the dimensions
indicated.
ATTENTION
Do not rotate the probe but leave it as in Fig. 15; if
it is too close to the ignition electrode, it could
damage the control box amplifier.
Fig. 15
2
1
D3810
Fig. 16
Probe Electrode
mm mm
mm
2 4 2
3
D3809

20195916 18
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Installation
4.11 Combustion head adjustment
At this stage of installation the blast tube and the pipe coupling
are secured to the boiler as shown in Fig. 17.
Therefore the adjustment of the combustion head is particularly
easy, an adjustment that depends solely on the maximum power
of the burner.
Therefore, this value must be set before adjusting the
combustion head.
Two adjustments of the combustion head are available.
Air adjustment Fig. 17
See diagram Fig. 18.
Rotate the screw 4)(Fig. 17) until the notch you have found
corresponds with the front surface 5)(Fig. 17) of the flange.
Gas adjustment Fig. 17
When the burner is installed for maximum output 1300 Mcal/h
(about 1500 kW), fit discs 1) and 2)(Fig. 17) supplied as standard
by removing the inner tube 3)(Fig. 17).
If the mains gas pressure is low, the head can be left in standard
configuration, limiting the modulation minimum to 450 Mcal/h
(about 520 kW).
Example: MAX burner output = 1370 Mcal/h.
The diagram (Fig. 18) shows that for this burner output, the air
adjustment should be made on notch 3, as in Fig. 17.
Before starting the burner, carry out the adjustments for the
output required and indicated in the diagram (Fig. 18).
NOTE:
Depending on the specific application, the adjustment can
be modified.
Fig. 17
5
3
2
1
0
4
6
312
D3811
Fig. 18
Notches No. (air = gas)
Burner maximum output
D9079