Riello 851T3 Quick start guide

Installation, use and maintenance instructions
20138017 (3) - 01/2019
Premix gas burners
Modulating operation
CODE MODEL TYPE
20078853 RX 360 S/PV 851T3
20137485 RX 360 S/PV GPL 851T3
GB

Translation of the original instructions

1 20138017
GB
Contents
1 Declarations................................................................................................................................................................................ 3
2 Information and general warnings............................................................................................................................................ 5
2.1 Information about the instruction manual .................................................................................................................... 5
2.1.1 Introduction.................................................................................................................................................................. 5
2.1.2 General dangers.......................................................................................................................................................... 5
2.1.3 Other symbols ............................................................................................................................................................. 5
2.1.4 Delivery of the system and the instruction manual...................................................................................................... 6
2.2 Guarantee and responsibility....................................................................................................................................... 6
3 Safety and prevention................................................................................................................................................................ 7
3.1 Background ................................................................................................................................................................. 7
3.2 Personnel training ....................................................................................................................................................... 7
4 Technical description of the burner ......................................................................................................................................... 8
4.1 Models available.......................................................................................................................................................... 8
4.2 Burner categories - Countries of destination ............................................................................................................... 8
4.3 Burner equipment........................................................................................................................................................ 8
4.4 Technical data............................................................................................................................................................. 9
4.5 Electrical data.............................................................................................................................................................. 9
4.6 Maximum dimensions................................................................................................................................................ 10
4.7 Burner description ..................................................................................................................................................... 11
4.8 Firing rate .................................................................................................................................................................. 12
4.8.1 Test boiler.................................................................................................................................................................. 12
4.8.2 Commercial boilers.................................................................................................................................................... 12
4.9 Output supplied ......................................................................................................................................................... 13
4.10 Burner controls (LME71... with PME71.901...).......................................................................................................... 14
4.10.1 Indication of the diagnostic mode.............................................................................................................................. 19
5 Installation ................................................................................................................................................................................ 20
5.1 Notes on safety for the installation ............................................................................................................................ 20
5.2 Handling .................................................................................................................................................................... 20
5.3 Preliminary checks .................................................................................................................................................... 20
5.4 Operating position ..................................................................................................................................................... 21
5.5 Preparing the boiler................................................................................................................................................... 21
5.5.1 Boring the boiler plate ............................................................................................................................................... 21
5.5.2 Head length............................................................................................................................................................... 21
5.6 Positioning probe - electrodes................................................................................................................................... 22
5.7 Fixing the air intake and gas valve ............................................................................................................................ 22
5.8 Securing the burner to the boiler............................................................................................................................... 23
5.9 Fuel supply................................................................................................................................................................ 24
5.9.1 Gas train.................................................................................................................................................................... 25
5.10 Gas valve adjustment................................................................................................................................................ 25
5.11 Electrical connections................................................................................................................................................ 26
5.11.1 Supply cables and external connections passage .................................................................................................... 26
5.11.2 Opening sequence of the fuse-holder ....................................................................................................................... 27
6 Start-up, calibration and operation of the burner ................................................................................................................. 28
6.1 Notes on safety for the first start-up .......................................................................................................................... 28
6.2 Adjustments prior to ignition...................................................................................................................................... 28
6.3 Fan adjustment.......................................................................................................................................................... 28
6.4 Burner start-up .......................................................................................................................................................... 29
6.4.1 First burner start-up (manual operation)................................................................................................................... 29
6.5 Manual Backup.......................................................................................................................................................... 32
6.5.1 Error during the backup procedure............................................................................................................................ 32
6.6 Burner adjustment..................................................................................................................................................... 33
6.6.1 Optimum calibration values ....................................................................................................................................... 33
6.7 Switching off the burner............................................................................................................................................. 34

20138017 2
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Contents
6.8 Setting and safety parameters (programmed control box).........................................................................................34
6.9 Combustion head.......................................................................................................................................................35
6.10 Final checks (with burner operating)..........................................................................................................................35
7 Maintenance ..............................................................................................................................................................................36
7.1 Notes on safety for the maintenance .........................................................................................................................36
7.2 Maintenance programme ...........................................................................................................................................36
7.2.1 Maintenance frequency..............................................................................................................................................36
7.2.2 Safety test - with gas feeding closed .........................................................................................................................36
7.2.3 Checking and cleaning...............................................................................................................................................36
7.2.4 Safety components ....................................................................................................................................................38
7.3 Opening and closing the burner.................................................................................................................................38
7.4 Recommended preventive maintenance programme ................................................................................................39
8 Operation, indications, diagnostic ..........................................................................................................................................40
8.1 Control sequence in the event of a fault ....................................................................................................................40
8.2 Error code list with operation via the control box control panel..................................................................................41
8.3 Resetting of burner control.........................................................................................................................................42
8.3.1 Diagnostics of the cause of the fault ..........................................................................................................................42
8.3.2 Before starting with a new program module or when the program module is replaced .............................................43
8.4 Manual reset ..............................................................................................................................................................44
8.4.1 Error during the reset process ...................................................................................................................................45
8.4.2 Reset..........................................................................................................................................................................45
A List of parameters PME71.901...).............................................................................................................................................46
B Appendix - Accessories ...........................................................................................................................................................49
C Appendix - Electrical panel layout...........................................................................................................................................50

3 20138017
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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: Pre-mixed gas burners
Model and type: RX 360 S/PV
RX 360 S/PV GPL
851T3
851T3
These products are in compliance with the following Technical Standards:
EN 12100
EN 676
and according to the European Directives:
GAR 2016/426/UE Gas Devices Regulations
MD 2006/42/EC Machine Directive
LVD 2014/35/UE Low Voltage Directive
EMC 2014/30/UE Electromagnetic Compatibility
Such products are marked as follows:
Quality is ensured by means of an ISO 9001:2015 certified quality and management system.
Declaration of Conformity A.R. 8/1/2004 & 17/7/2009 – Belgium
Manufacturer:
RIELLO S.p.A.
37045 Legnago (VR) Italy
Tel. ++39.0442630111
www.riello.com
Distributed by:
RIELLO NV
Ninovesteenweg 198
9320 Erembodegem
Tel. [phone]
Fax. [phone]
e-mail. [email protected]e
URL. www.riello.be
This document certifies that the series of devices specified below is in compliance with the model described in the EC Declaration of
Conformity and has been manufactured and distributed in compliance with the requirements defined in the Legislative Decree of
January 8th 2004 and July 17th 2009.
Type of product: Pre-mixed gas burner
Model: RX 360 S/PV
RX 360 S/PV GPL
Regulation applied: EN 676 and A.R. of January 8th 2004 - July 17th 2009
Controlling organisation:
TÜV Industrie Service GmbH
TÜV SÜD Gruppe
Ridlerstrase, 65
80339 München DEUTSCHLAND
Values measured: Max. CO: 13 mg/kWh
Max. NOx: 70 mg/kWh
Legnago, 21.04.2018 General Manager
RIELLO S.p.A. - Burners Department
Research and Development Director
RIELLO S.p.A. - Burners Department
Eng. U. Ferretti Eng. F. Comencini
EC-0085BR0225 Class 3 (EN 676)

20138017 4
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Declarations
Manufacturer's Declaration
RIELLO S.p.A. declares that the following products comply with the NOx emission limits specified by German standard
“1. BImSchV revision 26.01.2010”.
Product Type Model Output
Pre-mixed gas burner 851T3 RX 360 S/PV 60 - 360 kW
851T3 RX 360 S/PV LPG 60 - 360 kW
Legnago, 21.04.2018 General Manager
RIELLO S.p.A. - Burners Department
Research and Development Director
RIELLO S.p.A. - Burners Department
Eng. U. Ferretti Eng. F. Comencini

5 20138017
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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 Cen-
tre 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
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.

20138017 6
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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 appliance;
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;
use of non-original components, including spare parts, kits,
accessories and optionals;
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.

7 20138017
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Safety and prevention
3.1 Background
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.
Namely:
it can be applied to boilers operating with water, steam, diather-
mic oil, and to other uses expressly named by the manufacturer;
the type and pressure of the fuel, the voltage and frequency of the
electrical power supply, the minimum and maximum deliveries for
which the burner has been regulated, the pressurisation of the
combustion chamber, the dimensions of the combustion cham-
ber and the ambient temperature must all be within the values in-
dicated in the instruction manual.
Modification of the burner to alter its performance and desti-
nations is not allowed.
The burner must be used in exemplary technical safety con-
ditions. Any disturbances that could compromise safety must
be quickly eliminated.
Opening or tampering with the burner components is not
allowed, apart from the parts requiring maintenance.
Only those parts envisaged by the manufacturer can be
replaced.
3.2 Personnel training
The user is the person, body or company that has acquired the
machine and intends to use it for the specific purpose. He is re-
sponsible for the machine and for the training of the people work-
ing around it.
The user:
undertakes to entrust the machine exclusively to suitably
trained and qualified personnel;
undertakes to inform his personnel in a suitable way about
the application and observance of the safety instructions.
With that aim, the user undertakes to ensure that everyone
knows the use and safety instructions for his own duties;
Personnel must follow all the danger and caution indications
shown on the machine.
Personnel must not carry out, on their own initiative, opera-
tions or interventions that are not within their province.
Personnel are obliged to inform their superiors of every
problem or dangerous situation that may arise.
The assembly of parts of other makes, or any modifications,
can alter the characteristics of the machine and hence com-
promise operating safety. The manufacturer therefore
accepts no responsibility whatsoever for any which may
result from the use of non-original parts.
In addition:
3 Safety and prevention
WARNING
The manufacturer guarantees safety and proper
functioning only if all burner components are intact
and positioned correctly.
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.

20138017 8
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Technical description of the burner
4.1 Models available
(*) FACTORY SETTING. To change the external modulation parameter it is necessary to access the password-protected list of parameters using the
AZL 21... display kit (page 49).
4.2 Burner categories - Countries of destination
Tab. A
4.3 Burner equipment
Flange for gas valve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
Air intake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
Gas pipe. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
Screws M 5 x 16 to fix the valve. . . . . . . . . . . . . . . . . . . . . No. 4
Insulating screen and gasket . . . . . . . . . . . . . . . . . . . . . . . No. 1
Gas valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
2-pin plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
4-pin plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
7-pin plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
Small parts unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
Instruction booklet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
Spare parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
Hardware for burner assembly:
nuts 8 x 50 galvanised (with or without point) . . . . . . . . . . No. 4
galvanised washers Ø 8. . . . . . . . . . . . . . . . . . . . . . . . . . . No. 4
galvanised toothed washers Ø 8 . . . . . . . . . . . . . . . . . . . . No. 4
M8 galvanised nuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 4
4 Technical description of the burner
Designation Voltage Code External modulation (*)
RX 360 S/PV 230V - 50-60 Hz 20078853 3 points
RX 360 S/PV GPL 230V - 50-60 Hz 20137485 3 points
Country of destination Gas category
DE, LU, PL I2E
BE I2E(R)
BG, DK, EE, FI, HU, LV, NL, NO, SE I2H
BE, CY, DE, HU, MT, NL, PL I3P
AT, CH, CZ, ES, FR, GB, GR, IE, IS, IT, LT, PT, RO, SI, SK II2H3P
WARNING
The burner is supplied with the combustion head
and electrodes assembled.

9 20138017
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Technical description of the burner
4.4 Technical data
Tab. B
(1) Reference conditions: Ambient temperature 20°C - Gas temperature 15°C - Barometric pressure 1,013 mbar - Altitude 0 m a.s.l.
(2) Pressure at the socket P1) (Fig. 20 on page 25) with zero pressure in the combustion chamber and at maximum burner output.
(3) Sound pressure measured in manufacturer's combustion lab, with burner operating on test boiler, at maximum output. The sound power is meas-
ured with the “Free Field” method, as per EN 15036, and according to an accurate “Accuracy: Category 3” measurement, as described in EN ISO
3746.
4.5 Electrical data
Tab. C
Model RX 360 S/PV RX 360 S/PV GPL
Output (1) Max. kW
Mcal/h
360
310
60
52
Min. kW
Mcal/h
Fuel Natural gas: G20-G25 (methane) - LPG: (G31)
Supply pressure (2) mbar 17 - 100 25 - 100
Gas valve input diameter 1”
Operation – Intermittent (min. 1 stop in 24 hours).
– Modulating with kit (see ACCESSORIES)
Standard applications Boilers: water, steam, diathermic oil
Room temperature °C 0 - 40
Combustion air temperature °C max 60
Weight kg 25
Min. Average Max.
Noise levels (3) Sound pressure
Sound power dB(A) 39.7 51.6
54.7
66.6
72.8
84.7
Model RX 360 S/PV RX 360 S/PV GPL
Electrical power 1N~ 230V~ +/-10% 50/60 Hz
Fan motor rpm
W
V
A
5830
360
230 V 50/60 Hz
2.7
Ignition transformer V1 - V2
I1 - I2
230 V - 2 x 10 kV
0.3 A - 50/60 Hz - 40 mA
Absorbed electrical power kW max 0.51
Protection level IP40

20138017 10
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Technical description of the burner
4.6 Maximum dimensions
The maximum dimensions of the burner are given in Fig. 1.
Bear in mind that, in order to inspect the combustion head, the
burner must be removed from the boiler door.
Tab. D
Tab. E
L
H
T
TX
H
E
P
Fig. 1
20145532
mm H L P T TX D E
RX 360 S/PV 390 675 503 635 442 144 306
mm A B C
RX 360 S/PV 1218 564 485
Fig. 2
D88

11 20138017
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Technical description of the burner
4.7 Burner description
1 Combustion head
2 Ignition electrode
3 Flame sensor probe
4Gas valve
5 Air/gas mixer in the suction line circuit
6 Gas pressure test point
7 Gas valve conduit - Venturi
8 Gas inlet
9 Boiler fixing flange
10 Fan
11 Air passage in fan
12 Electrical control box
13 Luminous push-button for reset
14 Plug-socket on ionisation probe cable
15 Sockets for electrical connection
16 Transformer
17 Plate with four hole knock-outs for electrical cable routing
18 Programming card
19 Fuses
20 Relay
21 Switch 0-1
1
3
2910 14
12
5
15
20
19
8
46
716 17
13
18
21
11
20143825
Fig. 3
WARNING
Burner lockout may occur.
CONTROL BOX LOCKOUT:
if the button 13) lights up (Fig. 3) it signals that the
burner is in lockout.
Press the push button to reset.

20138017 12
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Technical description of the burner
4.8 Firing rate
The maximum output must not be greater than the maximum
limit of the diagram (Fig. 4).
The minimum output must not be lower than the minimum limit
of the diagram.
The ignition output must be selected from within area A for gas
G20 - G31.
The ignition output must be selected from within area B for gas
G25.
4.8.1 Test boiler
The firing rates were set in relation to special test boilers, accord-
ing to EN 676 regulations.
4.8.2 Commercial boilers
The burner-boiler combination does not pose any problems if the
boiler is EC type-approved.
If, however, the burner is to be used with a commercial boiler that
has not been EC approved and/or its combustion chamber di-
mensions are distinctly smaller, consult the manufacturer.
You are advised to use this burner for boilers with a frontal circu-
lation of the flue gases.
WARNING
The firing rate (Fig. 4) has been obtained at an
ambient temperature of 20°C, at a barometric
pressure of 1013 mbar (about 0 m a.s.l.).
50 70 90 110 130 150 370
170 190 210 390
230 250 270 290 310 330 350 410
-2
-1
0
1
2
3
4
5
6
7
8
9
10
11
20069649
A
B
Pressure in
combustion chamber - mbar
Heat output - kW Fig. 4

13 20138017
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Technical description of the burner
4.9 Output supplied
The diagrams (Fig. 5) allow you to set the power output either us-
ing the number of fan revs or using the pressure downstream of
the gas valve (P2) Fig. 19 on page 24.
Example:
Natural gas G20 operation NCV 9.45 kWh/Sm3
pressure on point 1 = - 12 mbar (see dashed straight line).
The burnt output corresponds to 300 kW.
Going vertically up the diagram, to intersect the dotted line, you
can estimate the value of the number of revs on the left hand y-
axis: in this case 4800 rpm
WARNING
For an exact reading of the number of revs there
is a kit for interfacing with the control box.
No. of motor turns/min.No. of motor turns/min.
Heat output – kW
Outlet pressure
Pressure
No. revs
gas valve - mbar
Outlet pressure
gas valve - mbar
Heat output – kW
Pressure
No. revs
G20 - G25
G31
Fig. 5

20138017 14
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Technical description of the burner
4.10 Burner controls (LME71... with PME71.901...)
Warning
All the operations (assembly, installation, maintenance, etc.)
should be carried out by qualified personnel.
Before modifying the wiring in the connection area, fully dis-
connect the system from the power supply (omnipolar sepa-
ration). Check the system is not powered and cannot be
inadvertently restarted. Failure to do this will lead to the risk
of electrocution.
Ensure protection against the risks of electrocution by pro-
viding adequate protection at the terminal connection of the
burner (for example, using blind terminals for the inputs and
the unused outputs). Failure to do this will lead to the risk of
electrocution.
The space where the program module is placed (Fig. 7) is
defined as a connection area and is therefore protected
against accidental contact when the module is not present.
If the housing or the area next to the operator panel is dam-
aged, the unit should be immediately switched off. Failure to
do this will lead to the risk of electrocution.
Press the operator panel buttons only with your hands, with-
out using any equipment or pointed objects. Damage to the
operator panel fill leads to the risk of electrocution.
To ensure the safety and reliability of the LME71... system, the
following instructions must also be followed:
– Avoid conditions which may promote condensation and hu-
midity.
Otherwise, before switching on again, make sure that the en-
tire control box is perfectly dry! Failure to do this will lead to
the risk of electrocution.
– Static charges must be avoided since they can damage the
control box’s electronic components when touched.
Program module
Assembly notes
Make sure that the relevant national safety standards are
respected
The standard LME7 unit should be fixed with M4 (UNC32) or
M5 (UNC24) fixing screws, respecting a maximum tightening
torque of 1.8 Nm and using all 3 fixing points.
The additional assembly surfaces of the housing have the
purpose of improving the mechanical stability.
The should rest on the assembly surface to which the unit is
fixed.
The planarity of the assembly surface should be within a tol-
erance range of 0.3 mm.
WARNING
To avoid accidents, material or environmental
damage, observe the following instructions!
The LME71... are safety devices! Avoid opening
or modifying it, or forcing its operation.
Riello S.p.A. cannot assume any responsibility for
damage resulting from unauthorised interven-
tions! Also the safety notes contained in other
chapters of this document must be respected!
WARNING
The installation and operation of the machine
should be carried out only by qualified personnel.
For the purposes of the safety notes in this docu-
ment, by qualified personnel is meant people au-
thorised to commission, ground and identify
electric devices, systems circuits conforming to
safety practices and norms.
WARNING
The formation of condensation, ice and the infiltra-
tion of water must absolutely be avoided!
Otherwise, the safety functions could be compro-
mise leading to a risk of electrocution.
S8593
Fig. 6
S8673
Fig. 7

15 20138017
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Technical description of the burner
Installation notes
Arrange the high voltage ignition cables separately, as far as
possible from the control box and the other cables.
Do not confuse the powered conductors with the neutral
ones.
Install the switches, fuses and grounding in compliance with
local regulations.
The connection diagrams show the burner controls with
grounded neutral conductor.
Make sure that the maximum admissible current of the termi-
nal connections is not exceeded.
Make sure the cable grommets of the connected cables
comply with the relevant standards.
Do not supply mains voltage to the control box outputs. Dur-
ing the testing of the devices controlled from the burner con-
trol (fuel valve, etc.), the LME71… should not be connected
to the units.
The mechanical connection between the actuators and the
fuel and air control elements, or any other type, should be
rigid.
Make sure there are no short-circuits on the air pressure
switch connection lines.
Electrical wiring to the flame detectors
It is important for signal transmission to be practically free of any
disturbances or loss:
Always separate the detector cables from the other cables:
– the capacitive reactance of the line reduces the magnitude
of the flame signal;
– use a separate cable.
Respect the permitted lengths for the cables of the detectors
(see Technical Data).
The ionisation probe powered from the mains is not pro-
tected from the risk of electric shocks.
Position the ignition electrode and the ionisation probe so
that the ignition spark cannot form an arc on the probe (risk
of electric overload) and that it cannot negatively effect the
supervision of the ionisation.
Description of displays and buttons
Tab. F
Button Function
Button A
– Displaying default output
– In lockout position: output value at the time of
the fault
Enter and Info button
The reset button (info button) is the key element
for resetting the burner control and activating/de-
activating the diagnostic functions.
Button -
– Displaying flame 2 signal current or display-
ing phases
– In lockout position: MMI phase at the time of
the fault
Button +
– Displaying flame 1 signal current or display-
ing phases
– In lockout position: MMI phase at the time of
the fault
Warning light with 3 colours
The warning light with three colours (red - yellow
- green) is the key indicator of the visual diagnos-
tics.
Button + and -: escape function
Press the + and - buttons at the same time!
– No adoption of value
– Access to a higher menu level
– Keep pressed for >1 second for the backup/
reset function
nfo
+
-
A
S8595 Fig. 8
A
nfo
-
+
- +
and

20138017 16
GB
Technical description of the burner
Technical data
Tab. G
Burner controls
LME71...
Mains voltage AC 230 V
Mains frequency 50 / 60 Hz +- 6%
Power absorption <10 W, normally
Primary external fuse Max. 6.3 A (slow)
Safety class I, with components in compliance with II and III, ac-
cording to DIN EN 60730-1
"Input" terminals
values
Voltage UMains 230 V
• If the mains voltage drops, the is a safety shut-
down from the operating position
• Restarting occurs when the mains voltage exceeds
< AC 165 V
> AC 195 V
Input currents and voltages
–UeMax
–UeMin
– IeMax
–IeMin
UN +10%
UN -15%
peak 1 mA (peak value)
peak 0.5 mA (peak value)
Voltage detection
–ON
–OFF
> AC 120 V
< AC 80 V
"Output" terminals
Values
Total load on the contacts:
Nominal voltage
Input current X3-04 unit (safety loop) from:
– fan motor contact maker
– ignition transformer
– fuel valves
AC 230 V - 50/60 Hz
Max. 5A
Individual contact rating:
Fan motor contact maker X2-01 foot 3
– Nominal voltage
– Nominal current
– Power factor
AC 230 V 50/60 Hz
2 A (15A max. 0.5 s)
Cos 0.4
Alarm output X2-03/3
– Nominal voltage
– Nominal current
– Power factor
AC 230 V 50/60 Hz
1A
Cos > 0.6
Ignition transformer X4-02 foot 3
– Nominal voltage
– Nominal current
– Power factor
AC 230 V 50/60 Hz
2A
Cos > 0.4
Auxiliary output
– Nominal voltage
– Nominal current
– Power factor
AC 230 V 50/60 Hz
1A
Cos > 0.6
Output relay contact 2 foot 2 X2-09 foot 7
– Nominal voltage
– Nominal current
– Power factor
AC 230 V 50/60 Hz
1A
Cos > 0.4
Fuel valve/pilot valve X7-01 foot 3
– Nominal voltage
– Nominal current
– Power factor
AC 230 V 50/60 Hz
1A
Cos > 0.4
Safety valve X6-03 foot 3
– Nominal voltage
– Nominal current
– Power factor
AC 230 V 50/60 Hz
1.5 A
Cos > 0.6
Cable length Power supply line from the mains Max. 100m (100 pF/m)
Sections The sections of the mains power supply lines (L, N, and PE) and, if necessary, the safety loop (safety limit
thermostat, lack of water, etc.) should be sized for the nominal currents according to the external primary fuse
selected. The sections of the other cables should be sized based on the fuse of the internal unit (max. 6.3 AT).
Environmental condi-
tions
Operation
Climatic conditions
Mechanical conditions
Temperature range
Humidity
DIN EN 60721-3-3
Class 3K3
Class 3M2
-40...+60°C
< 95% RH

17 20138017
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Technical description of the burner
Program sequence
M
Z
V1
V2
AL
K1X2-02 Pin 3
Sp e e d p o i n t s
P2 ( h i g h -re)
P0 (ignition load)
P1 ( l o w -r e)
0 (no-load speed)
R
LR-OPEN
LR-CLOSE
Op t i o nal ( LP)
if P235=1
Pm i n
P LT
ION / QRA
Not act ive
X3-04 Pin 5
Re l a y
con tact Function/inputs
Operating unit parameter number
LED permanent
LED ashi ng
t w t 11 t 10 t 12 t 3 t 3n t 4
St andb y St art u p Operat io n Shu t do wn Valve proving
if parameter
P241 =1 (ON)
Can b e
parameterized
t 1 TSA
432752622062522952
Re l a y
con tact Function/outputs
SK
X3-04 Pin 1
X5-03 Pin 1
X5-03 Pin 3
X65 Pin 1
X5-03 Pin 2
X65 Pin 1
X3-02 Pin 1
X5-01 Pin 2
X2-02 Pin 4
X9-04 Pin 2
PWM
K1X6-03 Pin 3
K4X2-01 Pin 3
K5X4-02 Pin 3
K7X7-04 Pin 4
X7-01 Pin 3
K2/ 1X2-03 Pin 3
Ph ase n u m b e r
382818080147274424048363030322422212 oP: xx (act ual load in %) 74
224
t11 t8
POC
POC
St an d b y
speed
Prepurge speed
Ignition load speed
High-re speed
Modulation range
Low-re speed
Po st p u r ge sp e ed Purge speed
242 243 244 245240240240240240240
*1
*2
td4 td1 td3 td2
S8594
Fig. 9

20138017 18
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Technical description of the burner
Key Fig. 9:
Tab. H
Times
Tab. I
AL Alarm device
AUX Auxiliary output
Dbr Lead connection
Reset button (info button)
EK2 Remote reset button
FSV Flame signal amplifier
ION Ionisation probe
K... Relay contact
LED Warning light with 3 colours
LP Air pressure switch
LR Load controller
LR-OPEN Load controller OPEN
LR-CLOSE Load controller CLOSED
MFan motor
NT Power supply unit
P LT Pressure switch valve test
Pmax Max. pressure switch
Pmin Min. pressure switch
POC Closure test
PV Pilot valve
QRA... UV flame detector
RControl thermostat or pressure switch
SA Actuator
SA-KL Low flame actuator
SA-NL High flame actuator
SA-R Feedback actuator
SA-Z Actuator CLOSED
SA-ZL Ignition load actuator
SL Safety loop
STB Safety limit thermostat
SV Safety valve
V1 Fuel valve
V2 Fuel valve
V2a Fuel valve
WLimit pressure switch or thermostat
ZIgnition transformer
µC µC controller
Input/output 1 signal (ON)
Input/output 2 signal (ON)
Input 1 permitted signal (ON) or 0 (OFF)
/re set
(EK1)
TSA Safety time
tw Standby time
t1 Pre-purging time
t3 Spark pre-ignition time
t3n Post-ignition time (P257 +0.3 seconds)
t4
(depending on
the application)
Interval: end of safety time - fuel valve 1 ON
Interval: end of safety time - fuel valve 2 ON
Interval: end of safety time - load controller
reset
t5 Interval: Pilot valve OFF - load controller
reset
t8 Post-purging time
t9
(depending on
the application)
Interval: Fuel valve 1 ON - pilot valve OFF
Interval: Fuel valve 2 ON - pilot valve OFF
t10 Time specified for air pressure switch status
message (timeout)
t11 Actuator opening time (timeout)
t12 Actuator closing time (timeout)
t22 2nd safety time
td1 Air pressure test
td2 Gas pressure test
td3 Gas valve filling test
td4 Gas valve bleed test