Riello RS 310/E BLU Quick start guide

Installation, use and maintenance instructions
20107195 (2) - 08/2021
Forced draught gas burners
Modulating operation
CODE MODEL
20106457 RS 310/E BLU
20106463 RS 410/E BLU
20106466 RS 510/E BLU
20106467 RS 610/E BLU
GB

Original instructions

1 20107195
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Contents
1 Declarations................................................................................................................................................................................ 3
2 Information and general warnings............................................................................................................................................ 4
2.1 Information about the instruction manual .................................................................................................................... 4
2.1.1 Introduction.................................................................................................................................................................. 4
2.1.2 General dangers.......................................................................................................................................................... 4
2.1.3 Other symbols ............................................................................................................................................................. 4
2.1.4 Delivery of the system and the instruction manual...................................................................................................... 5
2.2 Guarantee and responsibility....................................................................................................................................... 5
3 Safety and prevention................................................................................................................................................................ 6
3.1 Introduction.................................................................................................................................................................. 6
3.2 Personnel training ....................................................................................................................................................... 6
4 Technical description of the burner ......................................................................................................................................... 7
4.1 Burner designation ...................................................................................................................................................... 7
4.2 Models available.......................................................................................................................................................... 7
4.3 Technical data............................................................................................................................................................. 8
4.4 Electrical data.............................................................................................................................................................. 8
4.5 Maximum dimensions.................................................................................................................................................. 9
4.6 Firing rates ................................................................................................................................................................ 10
4.7 Test boiler.................................................................................................................................................................. 11
4.8 Burner equipment...................................................................................................................................................... 11
4.9 Burner description ..................................................................................................................................................... 12
4.10 Electrical panel description........................................................................................................................................ 13
4.11 Control box for the air/fuel ratio (REC 27 .../REC37 ...) ............................................................................................ 14
4.12 Operation sequence of the burner............................................................................................................................. 16
4.12.1 List of phases ............................................................................................................................................................ 17
4.13 Operator panel operation .......................................................................................................................................... 17
4.13.1 Description of the symbols on the display................................................................................................................. 17
4.13.2 Description of the buttons.......................................................................................................................................... 18
4.14 Servomotor (SQM33....) ............................................................................................................................................ 19
4.15 Calibration of the thermal relay ................................................................................................................................. 20
5 Installation ................................................................................................................................................................................ 21
5.1 Notes on safety for the installation ............................................................................................................................ 21
5.2 Handling .................................................................................................................................................................... 21
5.3 Preliminary checks .................................................................................................................................................... 21
5.4 Operating position ..................................................................................................................................................... 22
5.5 Preparing the boiler................................................................................................................................................... 22
5.5.1 Boring the boiler plate ............................................................................................................................................... 22
5.5.2 Blast tube length........................................................................................................................................................ 22
5.6 Securing the burner to the boiler............................................................................................................................... 22
5.7 Access to head internal part...................................................................................................................................... 23
5.8 Probe-electrode position ........................................................................................................................................... 24
5.9 Gas butterfly valve..................................................................................................................................................... 24
5.10 Combustion head adjustment.................................................................................................................................... 25
5.11 Gas pressures........................................................................................................................................................... 26
5.11.1 Gas feeding line ........................................................................................................................................................ 26
5.11.2 Gas train.................................................................................................................................................................... 27
5.11.3 Gas train installation.................................................................................................................................................. 27
5.11.4 Gas pressure............................................................................................................................................................. 28
5.12 Electrical wiring ......................................................................................................................................................... 29
5.12.1 Supply cables and external connections passage .................................................................................................... 30
6 Start-up, calibration and operation of the burner ................................................................................................................. 31

20107195 2
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Contents
6.1 Notes on safety for the first start-up...........................................................................................................................31
6.2 Adjustments prior to ignition.......................................................................................................................................31
6.3 Burner start-up ...........................................................................................................................................................31
6.4 Air / fuel adjustment ...................................................................................................................................................32
6.4.1 Air adjustment for maximum output ...........................................................................................................................32
6.4.2 Air/fuel adjustment and output modulation system ....................................................................................................32
6.4.3 Burner adjustment......................................................................................................................................................32
6.4.4 Output upon ignition...................................................................................................................................................32
6.4.5 Maximum output ........................................................................................................................................................32
6.4.6 Minimum output .........................................................................................................................................................32
6.5 Final adjustment of the pressure switches.................................................................................................................33
6.5.1 Air pressure switch.....................................................................................................................................................33
6.5.2 Maximum gas pressure switch...................................................................................................................................33
6.5.3 Minimum gas pressure switch....................................................................................................................................34
6.5.4 PVP pressure switch kit .............................................................................................................................................34
6.6 Visualisation and programming mode........................................................................................................................35
6.6.1 Normal mode .............................................................................................................................................................35
6.6.2 Info mode ...................................................................................................................................................................36
6.6.3 Service mode .............................................................................................................................................................37
6.6.4 Parameters Mode ......................................................................................................................................................37
6.7 Parameter modification procedure.............................................................................................................................38
6.8 Start-up procedure .....................................................................................................................................................40
6.9 Backup / Restore procedure ......................................................................................................................................42
6.9.1 Backup .......................................................................................................................................................................42
6.9.2 Restore ......................................................................................................................................................................43
6.9.3 List of parameters ......................................................................................................................................................45
6.10 Operation ...................................................................................................................................................................49
6.11 Ignition failure.............................................................................................................................................................49
6.12 Burner flame goes out during operation.....................................................................................................................49
6.13 Stopping of the burner ...............................................................................................................................................49
6.14 Final checks (with burner operating)..........................................................................................................................50
6.15 Motor lockout .............................................................................................................................................................50
7 Maintenance ..............................................................................................................................................................................51
7.1 Notes on safety for the maintenance .........................................................................................................................51
7.2 Maintenance programme ...........................................................................................................................................51
7.2.1 Maintenance frequency..............................................................................................................................................51
7.2.2 Safety test - with gas ball valve closed ......................................................................................................................51
7.2.3 Checking and cleaning...............................................................................................................................................51
7.2.4 Safety components ....................................................................................................................................................52
7.2.5 Measuring the ionisation current................................................................................................................................53
7.2.6 Checking the air and gas pressure on the combustion head.....................................................................................53
7.3 Opening the burner ....................................................................................................................................................54
7.4 Closing the burner......................................................................................................................................................54
8 Faults - Possible causes - Solutions.......................................................................................................................................55
8.1 Error codes list ...........................................................................................................................................................55
A Appendix - Accessories ...........................................................................................................................................................62
B Appendix - Electrical panel layout...........................................................................................................................................63

3 20107195
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Declarations
Declaration of Conformity in accordance with ISO / IEC 17050-1
These products are in compliance with the following Technical Standards:
• EN 12100
•EN676
According to the European Directives:
MD 2006/42/EC Machine Directive
LVD 2014/35/EU Low Voltage Directive
EMC 2014/30/EU Electromagnetic Compatibility
The quality is guaranteed by a quality and management system certified in accordance with ISO 9001:2015.
1 Declarations

20107195 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 may be present. An explosive atmos-
phere is defined as a mixture - under atmospheric
conditions - of air and flammable substances in
the form of gases, vapours, mist or dust in which,
after ignition has occurred, combustion spreads to
the entire unburned mixture.
PERSONAL PROTECTION EQUIPMENT
These symbols indicate the equipment that must
be worn and kept by the operator for protection
against threats against safety and/or health while
at work.
OBLIGATION TO ASSEMBLE THE COVER
AND ALL THE SAFETY AND PROTECTION DE-
VICES
This symbol signals the obligation to reassemble
the cover and all the safety and protection devices
of the burner after any maintenance, cleaning or
checking operations.
ENVIRONMENTAL PROTECTION
This symbol gives indications for the use of the
machine with respect for the environment.
IMPORTANT INFORMATION
This symbol indicates important information that
you must bear in mind.
This symbol indicates a list.

5 20107195
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Information and general warnings
2.1.4 Delivery of the system and the instruction
manual
When the system is delivered, it is important that:
the instruction manual is delivered to the user by the system
manufacturer, with the recommendation to keep it in the
room where the heat generator is to be installed.
The instruction manual shows:
– the serial number of the burner;
– the address and telephone number of the nearest Assis-
tance Centre;
The system supplier must carefully inform the user about:
– the use of the system;
– any further tests that may be required before activating the
system;
– maintenance, and the need to have the system checked at
least once a year by a representative of the manufacturer
or another specialised technician.
To ensure a periodic check, the manufacturer recom-
mends the drawing up of a Maintenance Contract.
2.2 Guarantee and responsibility
The manufacturer guarantees its new products from the date of
installation, in accordance with the regulations in force and/or the
sales contract. At the moment of the first start-up, check that the
burner is integral and complete.
In particular, the rights to the guarantee and the responsibility will
no longer be valid, in the event of damage to things or injury to
people, if such damage/injury was due to any of the following
causes:
incorrect installation, start-up, use and maintenance of the
burner;
improper, incorrect or unreasonable use of the burner;
intervention of unqualified personnel;
carrying out of unauthorised modifications on the equipment;
use of the burner with safety devices that are faulty, incor-
rectly applied and/or not working;
installation of untested supplementary components on the
burner;
powering of the burner with unsuitable fuels;
faults in the fuel supply system;
continuation of use of the burner when a fault has occurred;
repairs and/or overhauls incorrectly carried out;
modification of the combustion chamber with inserts that
prevent the regular development of the structurally estab-
lished flame;
insufficient and inappropriate surveillance and care of those
burner components most likely to be subject to wear and
tear;
use of non-original components, including spare parts, kits,
accessories and optional;
force majeure.
The manufacturer furthermore declines any and every re-
sponsibility for the failure to observe the contents of this
manual.
.........................................................................................
.........................................................................................
.........................................................................................
.........................................................................................
WARNING
Failure to observe the information given in this
manual, operating negligence, incorrect installa-
tion and carrying out of non authorised modifica-
tions will result in the annulment by the
manufacturer of the guarantee that it supplies with
the burner.

20107195 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 uses expressly foreseen by the manufactur-
er;
the type and pressure of the fuel, the voltage and frequency of the
electrical power supply, the minimum and maximum deliveries for
which the burner has been regulated, the pressurisation of the
combustion chamber, the dimensions of the combustion cham-
ber and the room temperature must all be within the values indi-
cated in the instruction manual.
Modification of the burner to alter its performance and desti-
nations is not allowed.
The burner must be used in exemplary technical safety con-
ditions. Any disturbances that could compromise safety must
be quickly eliminated.
Opening or tampering with the burner components is not
allowed, apart from the parts requiring maintenance.
Only those parts envisaged by the manufacturer can be
replaced.
3.2 Personnel training
The user is the person, body or company that has acquired the
machine and intends to use it for the specific purpose. He is re-
sponsible for the machine and for the training of the people work-
ing around it.
The user:
undertakes to entrust the machine exclusively to suitably
trained and qualified personnel;
undertakes to inform his personnel in a suitable way about
the application and observance of the safety instructions.
With that aim, 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.
must take all the measures necessary to pre-
vent unauthorised people gaining access to
the machine;
the user must inform the manufacturer if
faults or malfunctioning of the accident pre-
vention systems are noticed, along with any
presumed danger situation;
personnel must always use the personal pro-
tective equipment envisaged by legislation
and follow the indications given in this man-
ual.

7 20107195
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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
Version FS1
Designation Voltage Start-up Code
RS 310/E BLU FS1 3/400/50 Direct 20106457
RS 410/E BLU FS1 3/400/50 Direct 20106463
RS 510/E BLU FS1 3/400/50 Star/Triangle 20106466
RS 610/E BLU FS1 3/400/50 Star/Triangle 20106467
Range: R
Size
Fuel: Natural gas
Gas oil
Gas oil / Methane
Adjustment:
Flame control system:
FS1
FS2
Standard (1 stop every 24 h)
Continuous working (1 stop every 72 h)
Electrical supply of the system:
3/400/50
3/230/50
Voltage of auxiliaries:
230/50/60
110/50/60
R S 310 ETC FS1 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
Emission: C01 - ...
C02 - MZ
C03 - BLU
C03 - MX
Class 1 EN676
Class 2 EN676
Class 3 EN676
Class 3 EN676

20107195 8
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Technical description of the burner
4.3 Technical data
Tab. B
(1) Reference conditions: Room 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 5)(Fig. 4 on page 12) 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.
4.4 Electrical data
Tab. C
Model RS 310/E BLU RS 410/E BLU RS 510/E BLU RS 610/E BLU
Power(1)
Delivery (1) min - max kW 400/1200 ÷ 3630 500/1500 ÷ 4450 680/1800 ÷ 5250 1000/2200 ÷ 6250
Fuels Natural gas: G20 (methane gas) - G21 - G22 - G23 - G25
Gas pressure at max. output (2)
Gas: G20/G25 mbar 50.1/74.7 53.1/79.2 59.7/89.1 77.6/115.8
Operation FS1: Intermittent (min. 1 stop in 24 hours)
Standard applications Boilers: water, steam, diathermic oil
Ambient temperature °C 0 - 50
Combustion air temperature °C max 60
Noise levels (3) Sound pressure
Sound power dB(A) 78 89
80
91
82.5
93,5
85
96
Weight complete with its packaging kg 250 250 250 280
DIRECT START UP
Model RS 310/E BLU RS 410/E BLU
Main electrical supply 3 ~ 230/400V +/-10% 50 Hz
Fan motor IE3
rpm
V
kW
A
2920
220-240/380-415
7.5
25.2/14.5
2930
230/400
9.2
28.6/16.5
Ignition transformer V1 - V2
I1 - I2
230 V - 1 x 8 kV
1 A - 20 mA
Absorbed electrical power kW max 9.1 10.6
Protection level IP 54
STAR - TRIANGLE START UP
Model RS 510/E BLU RS 610/E BLU
Main electrical supply 3N ~ 400V +/-10% 50 Hz
Fan motor IE3
rpm
V
kW
A
2920
400/690
12
21/12.2
2915
400/690
15
26.8/15.5
Ignition transformer V1 - V2
I1 - I2
230 V - 1 x 8 kV
1 A - 20 mA
Absorbed electrical power kW max 13.9 16.9
Protection level IP 54

9 20107195
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Technical description of the burner
4.5 Maximum dimensions
The maximum dimensions of the burner are given in Fig. 1.
Bear in mind that inspection of the combustion head requires the
burner to be opened and the rear part turned on the hinge.
The maximum dimensions of the open burner are indicated by
the L and R positions.
The l position is reference for the refractory thickness of the boiler
door.
Tab. D
WARNING
*The gas adaptor is set also for DN 80 bore.
Fig. 1
F
A B
I
D
N
C
E
G
M
H
O O
200
R
L
20109729
mm A B C D E F* G H I L M N O R
RS 310/E BLU 1178 465 178 306 520 DN65 890 790 346 1015 400 528 290 890
RS 410/E BLU 1178 517 178 313 520 DN65 930 790 340 1015 400 528 290 890
RS 510/E BLU 1178 517 178 313 520 DN65 930 790 340 1015 400 528 290 890
RS 610/E BLU 1178 517 178 334 520 DN65 980 790 365 1015 400 528 290 890

20107195 10
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Technical description of the burner
4.6 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:
Tab. E
Model kW
RS 310/E BLU 400
RS 410/E BLU 500
RS 510/E BLU 680
RS 610/E BLU 1000
WARNING
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 25.
Fig. 2
Thermal power – kW
400 800 1200 1600 2000 2400 2800 3200 3600 4000 4400 4800
0
2
4
6
8
10
12
14
16
18
5200 5600 6000 6400 6800
-2
20
Pressure in
combustion chamber - mbar
20058566
RS 310/E
RS 410/E
RS 510/E
RS 610/E

11 20107195
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Technical description of the burner
4.7 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 set in relation to special test boilers, accord-
ing to EN 676 regulations.
In Fig. 3 you can see the diameter and length of the test combus-
tion chamber.
Example: RS 510/E BLU
Output 5000 kW - diameter 100 cm - length 5 m
4.8 Burner equipment
Gasket for gas train adaptor. . . . . . . . . . . . . . . . . . . . . . . . No. 1
Adaptor for gas train. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
Screws for fixing the gas train adaptor: M 16 x 70 . . . . . . . No. 4
Thermal insulation screen . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
M 18 x 60 screws to secure the burner flange
to the boiler. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 4
Cable grommets kit for optional electrical wiring input . . . . No. 1
M16 nuts to fix the gas elbow to the pipe coupling. . . . . . . No. 8
Stud bolts M16X60 to fix the gas elbow
to the pipe coupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
Spare parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
20057548 Fig. 3
Combustion chamber
m

20107195 12
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Technical description of the burner
4.9 Burner description
1 Lifting rings
2Fan
3Fanmotor
4 Air damper servomotor
5 Combustion head gas pressure test point
6 Combustion head
7 Ignition electrode
8 Flame stability disk
9 Electrical panel casing
10 Gas butterfly valve servomotor
11 Fan air inlet
12 Pipe coupling
13 Gasket for boiler fixing
14 Gas butterfly valve
15 Shutter
16 Combustion head movement screw
17 Lever for controlling the dampers with graduated scale
18 Air pressure switch
19 Combustion head air pressure test point
20 Maximum gas pressure switch with pressure test point
21 Flame sensor probe
22 Hinge for opening the burner
23 Pressure test point for air pressure switch “+”
24 Gas train adapter
25 Indication for checking the rotation direction of the purging
motor
26 Flame inspection window
27 Provision for flame sensor kit
28 Reset button
29 Transparent protection
ON
OFF
28
29
11
4
6 89
1011
1516
17
18
20
2226
721
2
3
51213
14
19 23
24 25
27
Fig. 4
20110527
ASSEMBLY VIEW
WARNING
To open the burner see section “Access to head
internal part” on page 23.

13 20107195
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Technical description of the burner
4.10 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 sec-
tion “Electrical wiring” on page 29
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 Direct start up line contactor
18 Star/triangle start-up line contactor
19 Thermal relay (with RESET button)
20 Triangle contactor (Star/triangle start up)
21 Star contactor (Star/triangle start up)
22 Auxiliary contacts
23 Timer for star/triangle start up
24 Control terminal board 4-20 mA (only FS2 models)
Fig. 5
20069487

20107195 14
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Technical description of the burner
4.11 Control box for the air/fuel ratio (REC 27 .../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

15 20107195
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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!

20107195 16
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Technical description of the burner
4.12 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

17 20107195
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Technical description of the burner
4.12.1 List of phases
4.13 Operator panel operation
The control box REC 27 .../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.
4.13.1 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

20107195 18
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Technical description of the burner
4.13.2 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