Riello RS 25/M BLU Quick start guide

Installation, use and maintenance instructions
20168415 (3) - 12/2021
Forced draught gas burners
Progressive two-stage or modulating operation
CODE MODEL TYPE
20169244 RS 25/M BLU 876 T
20169245 RS 25/M BLU 876 T
20169247 RS 35/M BLU 877 T
20168390 RS 35/M BLU 877 T
GB

Translation of the original instructions

1 20168415
GB
Contents
1 Declarations................................................................................................................................................................................ 3
2 Information and general warnings............................................................................................................................................ 5
2.1 Information about the instruction manual .................................................................................................................... 5
2.1.1 Introduction.................................................................................................................................................................. 5
2.1.2 General dangers.......................................................................................................................................................... 5
2.1.3 Other symbols ............................................................................................................................................................. 5
2.1.4 Delivery of the system and the instruction manual...................................................................................................... 6
2.2 Guarantee and responsibility....................................................................................................................................... 6
3 Safety and prevention................................................................................................................................................................ 7
3.1 Introduction.................................................................................................................................................................. 7
3.2 Personnel training ....................................................................................................................................................... 7
4 Technical description of the burner ......................................................................................................................................... 8
4.1 Burner designation ...................................................................................................................................................... 8
4.2 Models available.......................................................................................................................................................... 8
4.3 Burner categories........................................................................................................................................................ 9
4.4 Technical data............................................................................................................................................................. 9
4.5 Electrical data.............................................................................................................................................................. 9
4.6 Maximum dimensions................................................................................................................................................ 10
4.7 Firing rates ................................................................................................................................................................ 11
4.8 Test boiler.................................................................................................................................................................. 12
4.9 Burner equipment...................................................................................................................................................... 12
4.10 Burner description ..................................................................................................................................................... 13
4.11 Electrical panel description........................................................................................................................................ 14
4.12 Control box RFGO-A22............................................................................................................................................. 15
4.13 Servomotor (SQN90...).............................................................................................................................................. 16
5 Installation ................................................................................................................................................................................ 17
5.1 Notes on safety for the installation ............................................................................................................................ 17
5.2 Handling .................................................................................................................................................................... 17
5.3 Preliminary checks .................................................................................................................................................... 17
5.4 Operating position ..................................................................................................................................................... 18
5.5 Preparing the boiler................................................................................................................................................... 18
5.5.1 Boring the boiler plate ............................................................................................................................................... 18
5.5.2 Blast tube length........................................................................................................................................................ 18
5.5.3 Securing the burner to the boiler ............................................................................................................................... 18
5.6 Access to head internal part...................................................................................................................................... 19
5.7 Positioning the probe - electrode............................................................................................................................... 19
5.8 Combustion head adjustment.................................................................................................................................... 20
5.9 Gas supply ................................................................................................................................................................ 21
5.9.1 Gas feeding line ........................................................................................................................................................ 21
5.9.2 Gas train.................................................................................................................................................................... 22
5.9.3 Gas train installation.................................................................................................................................................. 22
5.9.4 Gas pressure............................................................................................................................................................. 22
5.10 Electrical connections................................................................................................................................................ 24
5.10.1 Supply cables and external connections passage .................................................................................................... 25
5.11 Motor rotation ............................................................................................................................................................ 25
6 Start-up, calibration and operation of the burner ................................................................................................................. 26
6.1 Notes on safety for the first start-up .......................................................................................................................... 26
6.2 Adjustments prior to ignition ...................................................................................................................................... 26
6.3 Servomotor adjustment ............................................................................................................................................. 26
6.4 Burner start-up .......................................................................................................................................................... 27
6.5 Adjusting the burner .................................................................................................................................................. 27
6.5.1 Ignition output............................................................................................................................................................ 27
6.5.2 Ignition output (minimum).......................................................................................................................................... 27
6.5.3 Maximum output........................................................................................................................................................ 28
6.5.4 Intermediate outputs.................................................................................................................................................. 28
6.6 Final adjustment of the pressure switches ................................................................................................................ 29

20168415 2
GB
Contents
6.6.1 Air pressure switch.....................................................................................................................................................29
6.6.2 Minimum gas pressure switch....................................................................................................................................29
6.6.3 Flame presence check...............................................................................................................................................29
6.7 Burner operation ........................................................................................................................................................30
6.7.1 Burner start-up ...........................................................................................................................................................30
6.7.2 Steady state operation ...............................................................................................................................................30
6.7.3 Ignition failure.............................................................................................................................................................30
6.8 Final checks (with burner operating)..........................................................................................................................31
7 Maintenance ..............................................................................................................................................................................32
7.1 Notes on safety for the maintenance .........................................................................................................................32
7.2 Maintenance programme ...........................................................................................................................................32
7.2.1 Maintenance frequency..............................................................................................................................................32
7.2.2 Safety test - with no gas supply .................................................................................................................................32
7.2.3 Checking and cleaning...............................................................................................................................................32
7.2.4 Safety components ....................................................................................................................................................33
7.3 Opening the burner ....................................................................................................................................................34
7.4 Closing the burner......................................................................................................................................................34
7.5 Electrical panel maintenance .....................................................................................................................................34
8 LED indicator and special function.........................................................................................................................................35
8.1 Description of LED lamps ..........................................................................................................................................35
8.2 Check mode function .................................................................................................................................................35
8.3 Flame control lock-out or emergency stop condition .................................................................................................35
8.4 LED lamps: burner operating status ..........................................................................................................................36
9 Problems - Causes - Remedies signalled by LED indicators ...............................................................................................37
A Appendix - Accessories ...........................................................................................................................................................42
B Appendix - Electrical panel layout...........................................................................................................................................43

3 20168415
GB
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: RS 25/M BLU
RS 35/M BLU
These products are in compliance with the following Technical Standards:
EN 676
EN 12100
and according to the European Directives:
GAR 2016/426/EU Gas Devices Regulation
MD 2006/42/CE Machine Directive
LVD 2014/35/EU Low Voltage Directive
EMC 2014/30/EU Electromagnetic Compatibility
Such products are marked as indicated below:
The quality is guaranteed by a quality and management system certified in accordance with ISO 9001:2015.
Legnago, 03.05.2021 Research & Development Director
RIELLO S.p.A. - Burner Department
Mr. F. Maltempi
Declaration of Conformity A.R. 8/1/2004 & 17/7/2009 – Belgium
Manufacturer:
RIELLO S.p.A.
37045 Legnago (VR) Italy
Tel. ++39.0442630111
www.riello.com
Distributed by:
VAN MARCKE HQ
LAR Blok Z 5,
B-8511 Kortrijk (Aalbeke) Belgium
Tel. [phone]
e-mail: [email protected]
URL. www.vanmarcke.com
This document certifies that the series of devices specified below is in compliance with the model described in the EC Declaration
of Conformity and has been manufactured and distributed in compliance with the requirements defined in the Legislative Decree of
January 8th 2004 and July 17th 2009.
Type of product: Forced draught gas burners
Model: RS 25/M BLU
RS 35/M BLU
Regulation applied: EN 676 and A.R. of January 8th 2004 - July -17th 2009
Controlling organisation:
TÜV Industrie Service GmbH
TÜV SÜD Gruppe
Ridlerstrase, 65
80339 München DEUTSCHLAND
Values measured:
RS 25/M BLU
CO max: 14 mg/kWh
NOx max: 72 mg/kWh
RS 35/M BLU
CO max: 1 mg/kWh
NOx max: 56 mg/kWh
CE-0085BR0379

20168415 4
GB
Declarations
Manufacturer's Declaration
RIELLO S.p.A. declares that the following products comply with the NOx emission limits specified by German standard
“1. BImSchV revision 26.01.2010”.
Product Type Model Output
Forced draught gas burners 876 T RS 25/M BLU 45 - 370 kW
877 T RS 35/M BLU 70 - 480 kW

5 20168415
GB
Information and general warnings
2.1 Information about the instruction manual
2.1.1 Introduction
The instruction manual supplied with the burner:
is an integral and essential part of the product and must not
be separated from it; it must therefore be kept carefully for
any necessary consultation and must accompany the burner
even if it is transferred to another owner or user, or to
another system. If the manual is lost or damaged, another
copy must be requested from the Technical Assistance
Centre of the area;
is designed for use by qualified personnel;
offers important indications and instructions relating to the
installation safety, start-up, use and maintenance of the
burner.
Symbols used in the manual
In some parts of the manual you will see triangular DANGER
signs. Pay great attention to these, as they indicate a situation of
potential danger.
2.1.2 General dangers
The dangers can be of 3 levels, as indicated below.
2.1.3 Other symbols
Abbreviations used
Ch. Chapter
Fig. Figure
Page Page
Sec. Section
Tab. Table
2 Information and general warnings
DANGER
Maximum danger level!
This symbol indicates operations which, if not
carried out correctly, cause serious injury, death
or long-term health risks.
ATTENTION
This symbol indicates operations which, if not
carried out correctly, may cause serious injury,
death or long-term health risks.
CAUTION
This symbol indicates operations which, if not
carried out correctly, may cause damage to the
machine and/or injury to people.
DANGER
DANGER: LIVE COMPONENTS
This symbol indicates operations which, if not
carried out correctly, lead to electric shocks with
lethal consequences.
DANGER: FLAMMABLE MATERIAL
This symbol indicates the presence of flammable
materials.
DANGER: BURNING
This symbol indicates the risks of burns due to
high temperatures.
DANGER: CRUSHING OF LIMBS
This symbol indicates the presence of moving
parts: danger of crushing of limbs.
WARNING: MOVING PARTS
This symbol indicates that you must keep limbs
away from moving mechanical parts; danger of
crushing.
DANGER: EXPLOSION
This symbol signals places where an explosive
atmosphere may be present. An explosive
atmosphere is defined as a mixture - under
atmospheric conditions - of air and flammable
substances in the form of gases, vapours, mist or
dust in which, after ignition has occurred,
combustion spreads to the entire unburned
mixture.
PERSONAL PROTECTION EQUIPMENT
These symbols indicate the equipment that must
be worn and kept by the operator for protection
against threats against safety and/or health while
at work.
OBLIGATION TO ASSEMBLE THE COVER
AND ALL THE SAFETY AND PROTECTION
DEVICES
This symbol signals the obligation to reassemble
the cover and all the safety and protection devices
of the burner after any maintenance, cleaning or
checking operations.
ENVIRONMENTAL PROTECTION
This symbol gives indications for the use of the
machine with respect for the environment.
IMPORTANT INFORMATION
This symbol indicates important information that
you must bear in mind.
IMPORTANT
This symbol indicates important information that
you must bear in mind.
This symbol indicates a list.

20168415 6
GB
Information and general warnings
2.1.4 Delivery of the system and the instruction
manual
When the system is delivered, it is important that:
the instruction manual is delivered to the user by the system
manufacturer, with the recommendation to keep it in the
room where the heat generator is to be installed.
The instruction manual shows:
– the serial number of the burner;
– the address and telephone number of the nearest
Assistance Centre;
The system supplier must carefully inform the user about:
– the use of the system;
– any further tests that may be required before activating the
system;
– maintenance, and the need to have the system checked at
least once a year by a representative of the manufacturer
or another specialised technician.
To ensure a periodic check, the manufacturer
recommends the drawing up of a Maintenance Contract.
2.2 Guarantee and responsibility
The manufacturer guarantees its new products from the date of
installation, in accordance with the regulations in force and/or the
sales contract. At the moment of the first start-up, check that the
burner is integral and complete.
In particular, the rights to the guarantee and the responsibility will
no longer be valid, in the event of damage to things or injury to
people, if such damage/injury was due to any of the following
causes:
incorrect installation, start-up, use and maintenance of the
burner;
improper, incorrect or unreasonable use of the burner;
intervention of unqualified personnel;
carrying out of unauthorised modifications on the equipment;
use of the burner with safety devices that are faulty,
incorrectly applied and/or not working;
installation of untested supplementary components on the
burner;
powering of the burner with unsuitable fuels;
faults in the fuel supply system;
continuation of use of the burner when a fault has occurred;
repairs and/or overhauls incorrectly carried out;
modification of the combustion chamber with inserts that
prevent the regular development of the structurally
established flame;
insufficient and inappropriate surveillance and care of those
burner components most likely to be subject to wear and
tear;
use of non-original components, including spare parts, kits,
accessories and optional;
force majeure.
The manufacturer furthermore declines any and every
responsibility for the failure to observe the contents of this
manual.
.........................................................................................
.........................................................................................
.........................................................................................
.........................................................................................
ATTENTION
Failure to observe the information given in this
manual, operating negligence, incorrect
installation and carrying out of non authorised
modifications will result in the annulment by the
manufacturer of the guarantee that it supplies with
the burner.

7 20168415
GB
Safety and prevention
3.1 Introduction
The burners have been designed and built in compliance with
current regulations and directives, applying the known technical
safety rules and envisaging all the potential danger situations.
It is necessary, however, to bear in mind that the imprudent and
clumsy use of the equipment may lead to situations of death risk
for the user or third parties, as well as the damaging of the burner
or other items. Inattention, thoughtlessness and excessive
confidence often cause accidents; the same applies to tiredness
and sleepiness.
It is a good idea to remember the following:
The burner must only be used as expressly described. Any
other use should be considered improper and therefore
dangerous.
Specifically:
it can be applied to boilers operating with water, steam,
diathermic oil, and to other uses expressly named by the
manufacturer; the type and pressure of the fuel, the voltage and
frequency of the electrical power supply, the minimum and
maximum deliveries for which the burner has been regulated, the
pressurisation of the combustion chamber, the dimensions of the
combustion chamber and the ambient temperature must all be
within the values indicated in the instruction manual.
Modification of the burner to alter its performance and
destinations is not allowed.
The burner must be used in exemplary technical safety
conditions. Any disturbances that could compromise safety
must be quickly eliminated.
Opening or tampering with the burner components is not
allowed, apart from the parts requiring maintenance.
Only those parts envisaged by the manufacturer can be
replaced.
3.2 Personnel training
The user is the person, body or company that has acquired the
machine and intends to use it for the specific purpose. He is
responsible for the machine and for the training of the people
working around it.
The user:
undertakes to entrust the machine exclusively to suitably
trained and qualified personnel;
undertakes to inform his personnel in a suitable way about
the application and observance of the safety instructions.
With that aim, he undertakes to ensure that everyone knows
the use and safety instructions for his own duties;
Personnel must observe all the danger and caution
indications shown on the machine.
Personnel must not carry out, on their own initiative,
operations or interventions that are not within their province.
Personnel must inform their superiors of every problem or
dangerous situation that may arise.
The assembly of parts of other makes, or any modifications,
can alter the characteristics of the machine and hence
compromise operating safety. The manufacturer therefore
declines any and every responsibility for any damage that
may be caused by the use of non-original parts.
In addition:
3 Safety and prevention
ATTENTION
The manufacturer guarantees safety and proper
operation only if all burner components are intact
and correctly positioned.
must take all the measures necessary to
prevent unauthorised people gaining access
to the machine;
the user must inform the manufacturer if
faults or malfunctioning of the accident
prevention systems are noticed, along with
any presumed danger situation;
personnel must always use the personal
protective equipment envisaged by legislation
and follow the indications given in this
manual.

20168415 8
GB
Technical description of the burner
4.1 Burner designation
4.2 Models available
Tab. A
4 Technical description of the burner
Series: R
Size
Fuel: Natural gas
Light oil
Light oil / Natural gas
Adjustment:
Flame control system:
FS1
FS2
Standard (1 stop every 24 h)
Electrical supply of the system:
3/400/50
3/230/50
Voltage of auxiliaries:
230/50/60
110/50/60
R S 25 MTC FS2 1/230/50/60 230/50/60
BASIC DESIGNATION
EXTENDED DESIGNATION
BLU
3N / 400V / 50Hz
3 / 230V / 50Hz
230V / 50-60Hz
110V / 50-60Hz
Heavy oil
E Electronic cam
EV Electronic cam and variable speed (with Inverter)
M Mechanical cam
P Proportional air/gas valve
S
L
LS
N
Head: TC Standard head
TL Extended head
Emission: ...
MZ
BLU
MX
Class 1 EN676
Class 2 EN676
Class 3 EN676
Class 3 EN676
3/400-230/50 3N / 400V-230V / 50Hz
Continuous operation only with the use of a
flame detection electrode (ionisation)
Designation Power supply voltage Start-up Code
RS 25/M BLU TC 1N ~ 230V - 50/60Hz Direct 20169244
RS 25/M BLU TL 1N ~ 230V - 50/60Hz Direct 20169245
RS 35/M BLU TC 1N ~ 230V - 50/60Hz Direct 20169247
RS 35/M BLU TL 1N ~ 230V - 50/60Hz Direct 20168390

9 20168415
GB
Technical description of the burner
4.3 Burner categories
Tab. B
4.4 Technical data
Tab. C
(1) Reference conditions: Ambient temperature 20°C - Gas temperature 15°C - Barometric pressure 1013 mbar - Altitude 0 m a.s.l.
(2) Pressure at the test point of the pressure switch (Fig. 26 on page 26) 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 output. The sound
power is measured using the "Free Field" method, required by EN 15036 standard, and according to an “Accuracy: Category 3” measurement, as
described in EN ISO 3746.
4.5 Electrical data
Tab. D
Country of destination Gas category
BE I2E(R)
LV I2H
CY, MT I3B/P
BE I3P
LU, PL II2E3B/P
DE II2ELL3B/P
FR II2Er3P
AT, CH, CZ, DK, EE, FI, GR, HU, IS, IT, LT, NO, RO, SE, SI, SK, TR II2H3B/P
ES, GB, IE, PT II2H3P
NL II2EK3B/P
Model RS 25/M BLU RS 35/M BLU
Output (1) Max. kW
Mcal/h
125 ÷ 370
108 ÷ 320
202 ÷ 480
174 ÷ 413
Min. kW
Mcal/h
45
39
70
60
Fuel Natural gas: G20 - G25
Pressione gas alla potenza max. (2)
Gas: G20 / G25 mbar 15.6 / 21.8 15.6 / 23.3
Operation • Continuous (min. 1 stop in 72 hours).
• This burner is also suitable for intermittent operation, only with the use of
the UV flame sensor kit.
Standard applications Boilers: water, steam, diathermic oil
Ambient temperature °C 0 - 40
Combustion air temperature °C max 60
Noise levels (3) Sound pressure
Sound power dB(A) 68 79
70
81
Model RS 25/M BLU RS 35/M BLU
Main electrical supply 230V ~ +/-10%
50/60Hz single phase
230V ~ +/-10%
50/60Hz single phase
Fan motor rpm
V
W
2800
230
300
2800
230
420
Acceleration current A14.9 16
Operating current A2.4 2.6
Motor capacitor µF 12.5/260 12.5/420
Ignition transformer V1 - V2
I1 - I2
230 V - 1 x 15 kV
1 A - 25 mA
230 V - 1 x 15 kV
1 A - 25 mA
Absorbed electrical power W max 720 820
Protection level IP 40

20168415 10
GB
Technical description of the burner
4.6 Maximum dimensions
The dimensions of the burner are given in Fig. 1.
Bear in mind that inspection of the combustion head requires the
burner to be opened and the rear part drawn back on the slide
bars.
The dimensions of the open burner are indicated by dimension O.
Tab. E
(1) Blast tube: short-long
Fig. 1
D3831
mm A D E F(1) HILONVM
RS 25/M BLU 442 422 508 230-365 140 305 138 780 84 177 1”1/2
RS 35/M BLU 442 422 508 230-365 152 305 138 780 84 177 1”1/2

11 20168415
GB
Technical description of the burner
4.7 Firing rates
The maximum output is chosen within area A.
The minimum output must not be lower than the minimum limit
of the diagram:
RS 25/M BLU = 42 kW
RS 35/M BLU = 70 kW
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 20.
A
100 200 300 400 500
80 140 200 260 320 380 500440
10
9
8
7
6
5
4
3
2
1
0
kW
Mcal/h
RS 35/M BLU
-1
20
A
80 120 160 200 240 280 320 360
60
400
340300260220180140
9
8
7
6
5
4
3
2
1
0
100
kW
Mcal/h
RS 25/M BLU
-1
40
20
Thermal power
Pressure in combustion
chamber - mbar
Fig. 2
20169179
Thermal power
Pressure in combustion
chamber - mbar

20168415 12
GB
Technical description of the burner
4.8 Test boiler
The firing rates were obtained in special test boilers, according to
EN 676 regulations.
In Fig. 3 you can see the diameter and length of the test
combustion chamber.
Example:
Output 407 kW (350 Mcal/h) - diameter 50 cm, length 1.5 m.
Although combination is guaranteed when boiler has a CE type-
approval, preliminary tests are recommended for boilers or
furnaces having a combustion chamber size much different than
the one specified in Fig. 3.
4.9 Burner equipment
The burner is supplied complete with:
Gas train flange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
Gasket for gas train flange . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
Flange fixing screws M8 x 25. . . . . . . . . . . . . . . . . . . . . . . No. 4
M8 x 25 screws to secure the burner
flange to the boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 4
Thermal flange gasket . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
Plugs for the electrical wiring . . . . . . . . . . . . . . . . . . . . . . . No. 3
Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
Spare parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
Fig. 3
Length of combustion
chamber - m
D497

13 20168415
GB
Technical description of the burner
4.10 Burner description
1 Combustion head
2 Ignition electrode
3 Screw for combustion head adjustment
4 Air pressure switch (differential type)
5 Flame sensor probe
6 Air pressure test point
7 Gas pressure test point and head fixing screw
8 Screws to secure fan to pipe coupling
9 Slide bars for opening the burner and inspecting the
combustion head
10 The servomotor controls the gas butterfly valve and the air
damper through the variable profile cam
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
11 Areas for passage of electric cables
12 Air inlet to fan
13 Gas input pipe
14 Gas butterfly valve
15 Boiler fixing flange
16 Flame stability disc
17 Flame inspection window
18 Extensions for slide bars (only for TL versions)
19 Air damper
20 Electrical control box
21 Fan motor
Burner lockout may occur:
CONTROL BOX LOCKOUT:
if the control box button 4)(Fig. 5) lights up, it indicates that the
burner is in lockout.
Press the push-button to reset.
20052390
13
14 16
6
11
10
18
12
15
7
4
3
17
20
21
19
1
2
5
8
9
Fig. 4
20169174
20169176
20169175

20168415 14
GB
Technical description of the burner
4.11 Electrical panel description
1 Power switch for:
automatic - manual - off operation
A button for: output increase - decrease
2 Ionisation probe connector
3 Areas for passage of electric cables
4 Light reset button
5 Control box base
6 Filter to protect against radio disturbance
7 Ignition transformer
8 Sockets for electrical connection
9 Capacitor (only for RS 25/M)
10 Relay
Fig. 5
421
8
3 6
9
5
10
7
20194863

15 20168415
GB
Technical description of the burner
4.12 Control box RFGO-A22
Important notes
All interventions (assembly and installation operations,
assistance, etc.) must be carried out by qualified personnel.
Before modifying the wiring in the control box connection
area, fully disconnect the system from the power supply
(omnipolar separation).
Protection against electrocution from the control box and all
connected electric components is obtained with the correct
assembly.
Before any intervention (assembly and installation
operations, assistance, etc.), ensure the wiring is in order
and that the parameters are correctly set, then make the
safety checks.
Falls and collisions can negatively affect the safety
functions. In this case, the control box must not be operated,
even if it displays no evident damage.
For safety and reliability, comply with the following
instructions:
– avoid conditions that can favour the development of
condensate and humidity. Otherwise, before switching on
again, make sure that the entire control box is perfectly dry!
– Static charges must be avoided since they can damage the
control box’s electronic components when touched.
Use
The control box is a control and supervision system of medium
and large capacity forced draught burners.
If used with the flame detection electrode the system can operate
continuously whereas, with the use of UV sensors it operates
intermittently with stop and restart request at least once every
24h.
Installation notes
• Make sure that the electrical wiring inside the boiler complies
with national and local safety regulations.
• Do not confuse the powered conductors with the neutral
ones.
• Ensure that spliced wires cannot get into contact with
neighbouring terminals. Use adequate ferrules.
• Arrange the H.V. ignition cables separately, as far as
possible from the control box and the other cables.
• When wiring the unit, make sure that AC 230 V mains voltage
cables are run strictly separate from extra low-voltage cables
to avoid risks of electrical shock hazard.
Technical data
Tab. F
Electrical wiring of the flame detector
It is important for signal transmission to be almost totally free of
any disturbances or loss:
• Always separate the detector cables from the other cables:
– The capacitive reactance of the line reduces the size of the
flame signal.
– Use a separate cable.
• Respect the allowed cable lengths.
• The ionisation probe is not protected against the risk of
electrocution. When connected to the electricity supply, the
ionisation probe must be protected against any accidental
contact.
• Position the ignition electrode and the ionisation probe so
that the ignition spark cannot form an arc on the probe (risk
of electric overcharge).
ATTENTION
To avoid accidents, material or environmental
damage, observe the following instructions!
The control box is a safety device! Avoid opening
or modifying it, or forcing its operation. The
Manufacturer cannot assume any responsibility
for damage resulting from unauthorised work!
Mains voltage AC 230 V -15 % / +10 %
Mains frequency 50 / 60 Hz
Primary fuse (external) Refer to the electric
system
Weight approx. 1.1 kg
Power absorption approx. AC 7 VA
Protection level IP40
Safety class II
Environmental conditions
Operation
Climatic conditions
Mechanical conditions
Temperature range
Humidity
DIN EN 60721-3-1
Class 1K2
Class 1M2
-40...+60°C
< 90% RH (non-condensing)
Fig. 6
20152163

20168415 16
GB
Technical description of the burner
4.13 Servomotor (SQN90...)
Important notes
All interventions (assembly and installation operations,
assistance, etc.) must be carried out by qualified personnel.
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.
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. G
ATTENTION
To avoid accidents, material or environmental
damage, observe the following instructions!
Avoid opening, modifying or forcing the
servomotor.
Mains voltage AC 220V-15%...AC 240V+10%
AC 100V-15%...AC110V+10%
Mains frequency 50 / 60 Hz +/- 6%
Power absorption 8 VA
Motor Synchronous
Drive angle up to 90°
Cable connection terminal board for 0.5 mm2(min.)
and 2.5 mm2(max)
Rotation direction Anticlockwise
Operation time 24 s. at 90°
Weight approx. 0.55 kg
Breakdown voltage 24...250V AC
Safety class II to DIN EN 60730
Environmental conditions:
Storage
Climatic conditions
Mechanical conditions
Temperature
Humidity
DIN EN 60721-3-1
Class 1K3
Class 1M2
-20...+60°C
< 95 % RH
Fig. 7
20162744

17 20168415
GB
Installation
5.1 Notes on safety for the installation
After carefully cleaning all around the area where the burner is to
be installed, and arranging for the environment to be illuminated
correctly, proceed with the installation operations.
5.2 Handling
The burner is shipped in cardboard packaging, so it is possible to
move it when it is still packaged with a transpallet or fork lift truck.
5.3 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 relevant supply pressures
H the data of the burner possible minimum and maximum
output (see Firing rate).
Warning. The burner output must be within the firing rate of
the boiler;
I the category of the appliance/countries of destination.
5 Installation
DANGER
All the installation, maintenance and disassembly
operations must be carried out with the electricity
supply disconnected.
ATTENTION
The installation of the burner must be carried out
by qualified personnel, as indicated in this manual
and in compliance with the standards and
regulations of the laws in force.
DANGER
The combustion air inside the boiler must be free
from hazardous mixes (e.g.: chloride, fluoride,
halogen); if present, it is highly recommended to
carry out cleaning and maintenance more
frequently.
ATTENTION
Burner handling operations can be highly
dangerous if not carried out with the greatest
attention: distance unauthorised personnel, check
integrity and suitability of the means available.
Check also that the area in which you are working
is empty and that there is an adequate escape
area (i.e. a free, safe area to which you can
quickly move if the burner should fall).
During handling, keep the load at no more than
20-25 cm from the ground.
After positioning the burner near the installation
point, correctly dispose of all residual packaging,
separating the various types of material.
CAUTION
Before proceeding with the installation operations,
carefully clean all around the area where the
burner will be installed.
CAUTION
After removing all the packaging, check the
integrity of the contents. In the event of doubt, do
not use the burner; contact the supplier.
The packaging elements (wooden cage or
cardboard box, nails, clips, plastic bags, etc.)
must not be abandoned as they are potential
sources of danger and pollution; they should be
collected and disposed of in the appropriate
places.
ATTENTION
A burner label that has been tampered with,
removed or is missing, along with anything else
that prevents the definite identification of the
burner makes any installation or maintenance
work difficult
Fig. 8
R. B. L.
GAS- KAASU
GAZ- AEPIO
0085
RI ELLO S.p .A.
I- 37045 Legnago (VR)
CE
ABC
EDF
HG
GH
I
D7738

20168415 18
GB
Installation
5.4 Operating position
5.5 Preparing the boiler
5.5.1 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.
5.5.2 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 range of available lengths L, is as follows:
For boilers with front flue passes 13)(Fig. 11), a protection in
refractory material 11) must be inserted between the boiler
refractory 12) and the blast tube 10).
This protection must not compromise the extraction of the blast
tube.
For boilers with a water-cooled front piece, a refractory lining 11)-
12)(Fig. 11) is not necessary, unless expressly requested by the
boiler manufacturer.
5.5.3 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. 13.
Separate the combustion head from the rest of the burner
(Fig. 11):
disengage the articulated coupling 4) from the graduated
sector 5);
remove screws 2) from the two slide bars 3);
remove screw 1) 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 unit 9)(Fig. 11) to the boiler plate, inserting the supplied
insulating gasket 6)(Fig. 11).
Use the 4 screws, also supplied, after protecting their thread with
an anti-locking product.
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.
The installation 5is prohibited for safety
reasons.
2 3 4 51
Fig. 9
D3928
mm ABC
RS 25-35/M BLU 160 224 M 8
Blast tube Short (mm) Long (mm)
RS 25-35/M BLU 230 365
Fig. 10
D455
Provide an adequate lifting system.
Fig. 11
D3834