Riello RS 810/EV BLU Quick start guide

Installation, use and maintenance instructions
20163082 (3) - 06/2021
Forced draught gas burner
Modulating operation
CODE MODEL TYPE
20160292 RS 810/EV BLU S032T2
GB

Translation of the original instructions

1 20163082
GB
Contents
1 Declarations................................................................................................................................................................................ 3
2 Information and general warnings............................................................................................................................................ 4
2.1 Information about the instruction manual .................................................................................................................... 4
2.1.1 Introduction.................................................................................................................................................................. 4
2.1.2 General dangers.......................................................................................................................................................... 4
2.1.3 Other symbols ............................................................................................................................................................. 4
2.1.4 Delivery of the system and the instruction manual...................................................................................................... 5
2.2 Guarantee and responsibility....................................................................................................................................... 5
3 Safety and prevention................................................................................................................................................................ 6
3.1 Introduction.................................................................................................................................................................. 6
3.2 Personnel training ....................................................................................................................................................... 6
4 Technical description of the burner ......................................................................................................................................... 7
4.1 Burner designation ...................................................................................................................................................... 7
4.2 Models available.......................................................................................................................................................... 7
4.3 Burner categories - Countries of destination ............................................................................................................... 8
4.4 Technical data............................................................................................................................................................. 8
4.5 Electrical data.............................................................................................................................................................. 8
4.6 Burner equipment........................................................................................................................................................ 9
4.7 Maximum dimensions.................................................................................................................................................. 9
4.8 Firing rates ................................................................................................................................................................ 10
4.9 Test boiler.................................................................................................................................................................. 10
4.10 Burner description ..................................................................................................................................................... 11
4.11 Electrical panel description........................................................................................................................................ 12
4.12 Control box for the air/fuel ratio (REC37...)............................................................................................................... 13
4.13 Operation sequence of the burner............................................................................................................................. 15
4.13.1 List of phases ............................................................................................................................................................ 16
4.14 Operator panel operation .......................................................................................................................................... 16
4.14.1 Description of the symbols on the display................................................................................................................. 16
4.14.2 Description of the buttons.......................................................................................................................................... 17
4.15 Servomotor (SQM33....) ............................................................................................................................................ 18
5 Installation ................................................................................................................................................................................ 19
5.1 Notes on safety for the installation ............................................................................................................................ 19
5.2 Handling .................................................................................................................................................................... 19
5.3 Preliminary checks .................................................................................................................................................... 19
5.4 Operating position ..................................................................................................................................................... 20
5.5 Removal of the locking screws from the shutter........................................................................................................ 20
5.6 Preparing the boiler................................................................................................................................................... 20
5.6.1 Boring the boiler plate ............................................................................................................................................... 20
5.6.2 Blast tube length........................................................................................................................................................ 20
5.7 Securing the burner to the boiler............................................................................................................................... 21
5.8 Access to head internal part...................................................................................................................................... 21
5.9 Probe-electrode position ........................................................................................................................................... 21
5.10 Combustion head adjustment.................................................................................................................................... 22
5.11 Gas feeding............................................................................................................................................................... 23
5.11.1 Gas feeding line ........................................................................................................................................................ 23
5.11.2 Gas train.................................................................................................................................................................... 24
5.11.3 Gas train installation.................................................................................................................................................. 24
5.11.4 Gas pressure............................................................................................................................................................. 24
5.12 Electrical wiring ......................................................................................................................................................... 25
5.12.1 Supply cables and external connections passage .................................................................................................... 26
6 Start-up, calibration and operation of the burner ................................................................................................................. 27

20163082 2
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Contents
6.1 Notes on safety for the first start-up...........................................................................................................................27
6.2 Adjustments prior to ignition.......................................................................................................................................27
6.3 Burner start-up ...........................................................................................................................................................27
6.4 Air / fuel adjustment ...................................................................................................................................................28
6.4.1 Air adjustment for maximum output ...........................................................................................................................28
6.4.2 Air/fuel adjustment and output modulation system ....................................................................................................28
6.4.3 Burner adjustment......................................................................................................................................................28
6.4.4 Output upon ignition...................................................................................................................................................28
6.4.5 Maximum output ........................................................................................................................................................28
6.4.6 Minimum output .........................................................................................................................................................28
6.5 Final adjustment of the pressure switches.................................................................................................................29
6.5.1 Air pressure switch.....................................................................................................................................................29
6.6 Pressure switch adjustment .......................................................................................................................................30
6.6.1 Maximum gas pressure switch...................................................................................................................................30
6.6.2 Minimum gas pressure switch....................................................................................................................................30
6.6.3 PVP pressure switch kit .............................................................................................................................................30
6.7 Visualisation and programming mode........................................................................................................................31
6.7.1 Normal mode .............................................................................................................................................................31
6.7.2 Info mode ...................................................................................................................................................................32
6.7.3 Service mode .............................................................................................................................................................33
6.7.4 Parameters Mode ......................................................................................................................................................33
6.8 Parameter modification procedure.............................................................................................................................34
6.8.1 Modify "acceleration- deceleration train" parameter ..................................................................................................36
6.8.2 Modify the parameter for continuous/intermittent operation (FS2/FS1) .....................................................................36
6.9 Start-up procedure .....................................................................................................................................................37
6.10 Backup / Restore procedure ......................................................................................................................................39
6.10.1 Backup .......................................................................................................................................................................39
6.10.2 Restore ......................................................................................................................................................................40
6.10.3 List of parameters ......................................................................................................................................................41
6.11 Operation ...................................................................................................................................................................45
6.12 Motor lockout .............................................................................................................................................................45
6.13 Ignition failure.............................................................................................................................................................45
6.14 Burner flame goes out during operation.....................................................................................................................45
6.15 Stopping of the burner ...............................................................................................................................................46
6.16 Final checks (with burner operating)..........................................................................................................................46
7 Maintenance ..............................................................................................................................................................................47
7.1 Notes on safety for the maintenance .........................................................................................................................47
7.2 Maintenance programme ...........................................................................................................................................47
7.2.1 Maintenance frequency..............................................................................................................................................47
7.2.2 Safety test - with gas feeding closed .........................................................................................................................47
7.2.3 Checking and cleaning...............................................................................................................................................47
7.2.4 Measuring the ionisation current................................................................................................................................48
7.2.5 Safety components ....................................................................................................................................................48
7.3 Checking the position of the rpm sensor....................................................................................................................48
7.4 Opening the burner ....................................................................................................................................................49
7.5 Closing the burner......................................................................................................................................................49
8 Faults - Possible causes - Solutions.......................................................................................................................................50
8.1 List of error codes ......................................................................................................................................................50
A Appendix - Accessories ...........................................................................................................................................................59
B Appendix - Electrical panel layout...........................................................................................................................................61

3 20163082
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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 burner
Model and type: RS 810/EV BLU S032T2
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 Appliances Regulation
MD 2006/42/EC Machine Directive
LVD 2014/35/EU Low Voltage Directive
EMC 2014/30/EU Electromagnetic Compatibility
PED 2014/68/EU (only FS2) Pressure Equipment Directive
Such products are marked as follows:
CE-0123CU1067 RS 810/EV BLU (Class 3 EN 676)
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
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 burner RS 810/EV BLU S032T2 1200 - 8000 kW

20163082 4
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Information and general warnings
2.1 Information about the instruction manual
2.1.1 Introduction
The instruction manual supplied with the burner:
is an integral and essential part of the product and must not
be separated from it; it must therefore be kept carefully for
any necessary consultation and must accompany the burner
even if it is transferred to another owner or user, or to
another system. If the manual is lost or damaged, another
copy must be requested from the Technical Assistance 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 is present. An explosive atmosphere is
defined as a mixture of dangerous substances
with air, under atmospheric conditions, in the form
of gases, vapours, mist or dust in which, after ig-
nition 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.
MOUNT CASING
This symbol indicates that it is mandatory to
mount casing again after maintenance, cleaning
or checks.
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 20163082
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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 installa-
tion date, 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;
use of the burner even following an error and/or an irregular-
ity;
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;
the 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.

20163082 6
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Safety and prevention
3.1 Introduction
The burners have been designed and built in compliance with
current regulations and directives, applying the known technical
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 users 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 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, he undertakes to ensure that everyone knows
the use and safety instructions for his own duties;
Personnel must observe all the danger and caution indica-
tions shown on the machine.
Personnel must not carry out, on their own initiative, opera-
tions 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 com-
promise 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
WARNING
The manufacturer guarantees safety and proper
functioning only if all burner components are intact
and positioned correctly.
the user must take all the measures neces-
sary to prevent 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 20163082
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Technical description of the burner
4.1 Burner designation
4.2 Models available
Tab. A
4 Technical description of the burner
Designation Voltage Start-up Code
RS 810/EV BLU 3/400/50 Inverter 20160292
Class 3 EN676
Range: R
Size
Fuel: Natural gas
Light oil
Light oil / Methane
Adjustment:
Flame control system:
FS1
FS2
Standard (1 stop every 24h)
Continuous operation (1 stop every 72h)
Electrical supply of the system:
3/400/50
3/230/50
Voltage of auxiliaries:
230/50/60
110/50/60
R S 810 EV TC
Emission: C01 or... Class 1 EN676
C02 or MZ Class 2 EN676
C03 or BLU Class 3 EN676
FS1/FS2 3/400/50 230/50/60
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 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
C03 or MX
C05 Class 5 EN676 (NOx < 56 mg/kWh)
WARNING
*The burner leaves the factory set up for FS1 op-
eration. If FS2 operation is required, see section
“Modify the parameter for continuous/intermittent
operation (FS2/FS1)” on page 36..

20163082 8
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Technical description of the burner
4.3 Burner categories - Countries of destination
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 21)(Fig. 4 on page 11) 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 “Accuracy: Category 3” measuring accuracy, as set out in
EN ISO 3746.
4.5 Electrical data
Tab. D
Gas category Destination country
I2ELL DE
I2H AT-BG-CH-CZ-DK-EE-ES-FI-GB-GR-HU-HR-IE-IS-IT-LT-LV-NO-
PT-RO-SE-SI-SK-TR
I2Er FR
I2E LU - PL
I2E(R) BE
I2EK NL
Model RS 810/EV BLU
Power (1)
Output (1)
min -
max kW 1200/3500 ÷ 8000
Fuels Natural gas: G20 (methane gas) - G25
Gas pressure at max. output (2) -
Gas: G20/G25 mbar 49.7/73
Operation
FS1: Intermittent (min. 1 stop in 24 hours)
FS2: Continuous (min. 1 stop in 72 hours)
The burner leaves the factory set for the standard operation.
Standard applications Boilers: water, steam, diathermic oil
Ambient temperature °C 0 - 40
Combustion air temperature °C max 60
Burner weight Kg 300
Noise levels (3) Sound pressure
Sound power dB(A) 88.3 103.00
Model RS 810/EV BLU
Main electrical supply 3 ~ 400V +/-10% 50 Hz
1N ~ 230V +/-10% 50 Hz
Fan motor IE3
rpm
V
kW
A
2950
400/690
22
39.4/22.7
Ignition transformer V1 - V2
I1 - I2
230 V - 1 x 8 kV
1 A - 20 mA
Absorbed electrical power kW max 24.5
Protection level IP 54

9 20163082
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Technical description of the burner
4.6 Burner equipment
Thermal insulation screen . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
Gasket for gas train . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 2
M 12 x 16 replacement screws to secure the combustion head. . No. 2
M18 x 70 screws to secure the burner to the boiler . . . . . . No. 4
18 washer to secure the burner to the boiler . . . . . . . . . No. 4
M16 x 67 stud bolts to fix the gas elbow to the
pipe coupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 8
M16 nuts to fix the gas elbow to the pipe coupling . . . . . . . No. 8
16 washer to secure the gas flange . . . . . . . . . . . . . . . . No. 8
Pressure kit switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
Spare parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
4.7 Maximum dimensions
The maximum dimensions of the burner are shown in Fig. 1.
Bear in mind that inspection of the combustion head requires the
burner to be opened and the rear part turned on the hinge.
The maximum dimensions of the open burner are indicated by
the A and R positions.
The l position is reference for the refractory thickness of the boiler
door.
Tab. E
Fig. 1
F
E
PT
I
N
C
S
D
G M
L
R
A
R
A
20162256
mm A C D E F G I L M N P R S T
RS 810/EV BLU 1197 173 363 585 DN80 577 405 990 413 260 1345 1055 420 558

20163082 10
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Technical description of the burner
4.8 Firing rates
The MAXIMUM OUTPUT is chosen from within the diagram area
(Fig. 2).
The MINIMUM OUTPUT must not be lower than the minimum
limit of the diagram:
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. 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 manufac-
turer.
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 combus-
tion chamber.
Example: RS 810/EV BLU
Output 7000 kW - diameter 120 cm - length 6 m.
Model kW
RS 810/EV BLU 1200
WARNING
The firing rate value (Fig. 2) has been obtained
considering an ambient temperature of 20C, an
atmospheric pressure of 1013 mbar (approx. 0 m
a.s.l.), and with the combustion head adjusted as
shown on page 22.
Thermal power – kW Fig. 2
Combustion chamber
pressure - mbar















                  
20161991
Fig. 3
Combustion chamber
m
D2448

11 20163082
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Technical description of the burner
4.10 Burner description
1 Lifting rings
2 Cover for electrical panel
3 Lever for combustion head movement
4 Air pressure test point for combustion head
5 Combustion head
6 Shutter
7 Flame stability disc
8 Gas inlet flange
9 Maximum gas pressure switch
10 Gas servomotor
11 Hinge for burner opening
12 Protection
13 Air inlet for fan
14 Air damper control lever
15 Protection for viewing port
16 Reset button
17 Ignition electrode
18 Flame sensor probe
19 Fan motor
20 Gasket for boiler fixing
21 Gas pressure test point for combustion head
22 Pipe coupling
23 Air pressure test point for combustion head
24 Pressure test point for air pressure switch “+”
25 Air pressure switch
26 Fan
27 Servomotor for air dampers
28 Motor revolution sensor
Fig. 4
20 23
21 22 25
27 26
10
28
24
2113456
7
16
15
14 13 12 11 98
19
18
17
20163248
CAUTION
The burner can be opened to the right or to the left
without links to the fuel supply side.
When the burner is closed, the hinge can be refit-
ted on the opposite side.

20163082 12
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Technical description of the burner
4.11 Electrical panel description
1 Electrical control box
2 ON/OFF selector
3 Output regulator
4 Earth terminal
5 Supply cables and external connections passage. See
“Electrical wiring” on page 25.
6 Bracket for applying the kits
7 Main terminal supply board
8 Relay with clean contacts for signalling the burner is in lock-
out
9 Relay with clean contacts for signalling the burner is operat-
ing
10 Auxiliary circuits fuse (includes a spare fuse)
11 Air pressure switch
12 Ignition transformer
13 Ionisation probe cable
14 Operator panel with LCD display
15 Light signalling burner lockout
16 Reset button
17 Relay with clean contacts for VSD signal
18 Relay with clean contacts
19 Control terminal board 4-20 mA
12
14
6
2
5
4
4
13
4
4
5
7
4
3
16
15
1
11
9
19
18
17
8
10
Fig. 5
20081976

13 20163082
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Technical description of the burner
4.12 Control box for the air/fuel ratio (REC37...)
Warnings
The control box is a system to check the burners, based on a mi-
croprocessor and equipped with components to adjust and su-
pervise medium and large capacity forced draught burners.
The control box contains the following components:
– burner management system with valve leak detection control
device;
– electronic device to check the fuel/air ratio with a maximum
of 2 actuators;
– Modbus interface.
All interventions (assembly and installation operations,
assistance, etc.) must be carried out by qualified personnel.
Before carrying out any checks on the wiring, fully isolate the
system from the electric mains (omnipolar separation).
Check the system is not powered and cannot be accidentally
reconnected. Failure to do this will lead to the risk of electro-
cution.
Protection against electrocution from the control box and all
connected electric components is obtained with the correct
assembly.
After every intervention (assembly and installation opera-
tions, assistance, etc.), ensure the wiring is in order and that
the parameters are correctly set, then perform 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.
During the programming of the air-fuel ratio control curves,
the technician should constantly observe the quality of the
combustion process (for example using a gas analyser) and,
in the event of inadequate combustion values or dangerous
conditions, should take appropriate action, for example shut-
ting down the system manually.
The plugs of the connection cables or other accessories can
be disconnected when the system has been switched off.
The connections to the actuators do not provide a secure
separation from the mains voltage.Before connecting or
changing the actuators the system should be off to avoid any
conditions that could cause the formation of condensation or
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.
Static charges must be avoided since they can damage the
control box’s electronic components when touched.
WARNING
To avoid accidents, material and/or environmental
damage, observe the following instructions!
The control box is a safety device! Avoid opening
or modifying it, or forcing its operation. Riello
S.p.A. cannot assume any responsibility for dam-
age resulting from unauthorised interventions!
Risk of explosion!
An incorrect configuration can provoke fuel over-
charging, with the consequential risk of explosion!
The operators must be aware that the incorrect
setting of the visualisation and operation control
box, and of the positions of the fuel and/or air ac-
tuators, can cause dangerous conditions during
burner operation.
WARNING
For the safety and reliability of the control box,
comply with the following instructions:
Fig. 6
D8266

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Technical description of the burner
Technical data
Tab. F
Control box Mains voltage AC 230 V -15% / +10%
Mains frequency 50 / 60 Hz ±6%
Power absorption < 30 W
Safety class I, with components in compliance with II and III, ac-
cording to DIN EN 60730-1
Load on
‘input’ terminals
Fuse on the control box (can be inspected) 6.3 AT
Undervoltage
– Safety switch-off from operating position to mains
voltage
– Restart when mains voltage picks up
< AC 186V
> AC 195V
Cable length – Main line AC 230 V
– Control load (TL1-TL2)
– External reset button (RS)
– Load exit (DC 0/2...10V)
– Fuel valve
– Other lines
Max. 100 m (100 pF / m)
Max. 20 m (100 pF/m)
Max 20 m (100 pF/m)
Max. 10 m (100 pF/m)
Max. 3 m (100 pF/m)
Max. 3 m (100 pF/m)
Environmental
conditions
Storage
– Climatic conditions
– Mechanical conditions
– Temperature range
– Humidity
DIN EN 60721-3-1
Class 1K3
Class 1M2
-20 ... +60 °C
< 95% RH
Transport
– Climatic conditions
– Mechanical conditions
– Temperature range
– Humidity
DIN EN 60721-3-2
Class 2K2
Class 2M2
-30 ... +60 °C
< 95% RH
Operation
– Climatic conditions
– Mechanical conditions
– Temperature range
– Humidity
DIN EN 60721-3-3
Class 3K3
Class 3M3
-20 ... +60 °C
< 95% RH
WARNING
Condensation, the formation of ice and the entry
of water are prohibited!

15 20163082
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Technical description of the burner
4.13 Operation sequence of the burner
t1 TSA1
5) 6)
27s 5s
13)
30s 0.6s
Pa
P
P
P
P
Phase number
INPUT SIGNALS
Thermostat/pressure switch
OUTPUT SIGNALS
Thermostat/pressure switch
Ionisation probe ION
Air pressure switch PA
Min gas pressure switch
Min gas pressure switch
Gas pressure switch for
PGVP leak detection control
Alternative to the control
safety TS
Fan motor MV
Transformer of
Safety valve VS
Fuel valve V1
Fuel valve V2
Pilot valve VP
Lock-out signal
indicator TL
SERVOMOTORS
Air Fuel
90°
Nominal load
Pos. of post-purging
Ignition load
Low flame
Pos. without load
0°
S8870 Fig. 7
Checking of
sealSwitching off
Operation
Start-up
Timer - Resolution - Ratio
Timer 1 (parameters)
Timer 2 (parameters)
Timer 3 = max. phase time
Input signals
PGmin
PGMin
Max gas pressure switch
PGMax
CPI seal
TA ignition
90°
Nominal load
Pos. of post-purging
Ignition load
Low flame
Pos. without load
0°
RAST plug
X3-04 Pin 1/2
PIN number
X5-03 Pin 1/4
X10-05 Pin 2 Pin 3/4
X10-06 Pin 1/2
X3-02 Pin 1/2
X5-01 Pin 2/3
X5-01 Pin 2/3
X5-02 Pin 2/3
X9-04 Pin 2/3
X5-02 Pin 2/3
X3-05 Pin 1
X4-02 Pin 2/3
X6-03 Pin 2/3
X8-02 Pin 1/3
X7-01 Pin 2/3
X7-02 Pin 2/3
X3-05 Pin 2
RAST plug
PIN number
X54
X53
Signal ON
Signal OFF
Both states are allowed

20163082 16
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Technical description of the burner
4.13.1 List of phases
4.14 Operator panel operation
The control box REC37 ... is connected directly to the operator
panel (Fig. 8).
The buttons allow you to programme the operation and diagnos-
tics menus.
The burner management system is shown on the LCD display
(Fig. 9). To simplify the diagnostics, the display shows the oper-
ating status, type of problem, and when the problem arose.
4.14.1 Description of the symbols on the display
The brightness of the display can be adjusted from 0 ... 100%
with the parameter 126.
Phase Description
Ph00 Lockout phase
Ph02 Safety phase
Ph10 Closing paused
Ph12 Standby
Ph22 Fan motor (MV) = ON
Safety valve (VS) = ON
Ph24 The burner moves to the pre-purging position
Ph30 Pre-purging time
Ph36 The burner moves to the ignition position
Ph38 Ignition phase (TA) = ON
Ph39 Minimum gas pressure switch test (PGmin.)
Ph40 Fuel valve (V) = ON
Ph42 Ignition (TA) = OFF
Ph44 t44 = interval time 1
Ph60 Operation
Ph62 The burner moves to the switching off position
Ph70 t13 = post-combustion time
Ph72 The burner moves to the post-purging position
Ph74 t8 = post-purging time
Ph78 t3 = post-purging time
Ph80 Emptying time (valve leak detection)
Ph81 Atmospheric time test (valve leak control)
Ph82 Filling time (valve leak detection)
Ph83 Pressure test time (valve leak detection)
Ph90 Standby time due to lack of gas
Phase Description
WARNING
Observe the procedures and adjustments
shown below.
All interventions (assembly and installation
operations, assistance, etc.) must be carried
out by qualified personnel.
If the display and operator panel are dirty,
clean them with a dry cloth.
Protect the panel from excessive tempera-
tures and liquids.
D9001 Fig. 8
Lock-out lamp
Flame presence
Valve powered
Ignition transformer
Fan motor powered
Pre-heater active
Heat request
Info mode active
Service mode active
Closure of servomotors
Opening of servomotors
Units of measurement
Lockout
Parameter mode active
only for light oil burners
Vhmin s
D9000
powered
Fig. 9

17 20163082
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Technical description of the burner
4.14.2 Description of the buttons
Tab. G
Button Button Function
Button F
To adjust the fuel servomotor
(keep pressed and adjust the value by pressing or )
Button A
To adjust the air servomotor
(keep pressed and adjust the value by pressing or )
Buttons A and F
VSD function
To change the mode setting parameter P
(simultaneously press and plus or )
Button Info and
Enter
•Enter in Parameters Mode
•Reset in the event of a lockout
• Access to a lower level of the menu
• To navigate in Mode Info or Service and permits:
– the selection of the parameter (flashing symbol)(press for <1 s)
– access to a lower level of the menu (press from 1...3 s)
– access to a higher level of the menu (press from 3...8 s)
– access to another Mode (press for > 8 s)
Button -
Lowering the value
– Access to a lower point of the modulation curve
– Scrolling the parameter list
Button +
Increasing the value
– Access to a higher point of the modulation curve
– Scrolling the parameter list
Buttons - and +
Quit function (ESC)
(press and simultaneously)
– Does not confirm the value
– Access to a higher level of the menu
F
F
A
A
VSD
AF
F
A
/reset
ESC

20163082 18
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Technical description of the burner
4.15 Servomotor (SQM33....)
Warnings
Installation notes
The static torque is reduced when the electrical supply of the
actuator is switched off.
Technical data
Tab. H
WARNING
To avoid accidents, material or environmental
damage, observe the following instructions!
Do not open, modify or force the actuators.
All interventions (assembly and installation
operations, assistance, etc.) must be carried
out by qualified personnel.
Before modifying the wiring of the servomotor
in the connection area, 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.
After every intervention (assembly and instal-
lation operations, assistance, etc.), ensure
the wiring is in order, then make the safety
checks.
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.
WARNING
Assembly notes
The connection between the actuator command
shaft and the control element must be rigid, with-
out any mechanical play.
WARNING
During the maintenance or replacement of the
actuators, be careful not to invert the connec-
tors.
Model SQM33.5...
Operating voltage AC / DC 24V ± 20%
Safety class 2 according to EN 60 730
Power absorption Max. 10 W
Protection level IP54 in compliance with EN 60 529-1
Cable connection RAST2,5, connectors
Rotation direction - GAS servomotor: clockwise
- Air servomotor: anticlockwise
WARNING
The rotation direction is set in the
factory using the control box param-
eter REC ...
Rated torque (max.) 3 Nm
Static torque (max.) 3 Nm
Running time for 90° 5 s.
Weight approx. 1.4 kg
Environmental conditions:
Operation
Climatic conditions
Mechanical conditions
Temperature range
Humidity
DIN EN 60 721-3-3
Class 3K5
Class 3M4
-20...+60°C
< 95% rh
WARNING
Condensation, the formation of ice and the entry
of water are prohibited!
D8271 Fig. 10