Riello RX 700 S/PV Quick start guide

Installation, use and maintenance instructions
20079424 (8) - 04/2016
Premix gas burners
Progressive two-stage or modulating operation
CODE MODEL TYPE
20074586 RX 700 S/PV 854T3
20074219 RX 850 S/PV 926T1
20050087 RX 1000 S/PV 891T3
GB

Translation of the original instructions

1
20079424
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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 Models available............................................................................................................................................................. 7
4.2 Burner categories - Countries of destination .................................................................................................................. 7
4.3 Technical data ................................................................................................................................................................ 7
4.4 Maximum dimensions..................................................................................................................................................... 8
4.5 Burner description........................................................................................................................................................... 9
4.6 Burner equipment........................................................................................................................................................... 9
4.7 Firing rates.................................................................................................................................................................... 10
4.7.1 Test boiler..................................................................................................................................................................... 11
4.7.2 Commercial boilers....................................................................................................................................................... 11
4.8 Output supplied............................................................................................................................................................. 12
4.9 Burner controls (LME71... with PME71.901...) ............................................................................................................. 13
4.9.1 Indication of the diagnostic mode................................................................................................................................. 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 Preparing the boiler ...................................................................................................................................................... 20
5.5.1 Boring the boiler plate................................................................................................................................................... 20
5.5.2 Head length .................................................................................................................................................................. 20
5.6 Securing the burner to the boiler .................................................................................................................................. 21
5.7 Fuel supply ................................................................................................................................................................... 22
5.7.1 Gas train ....................................................................................................................................................................... 22
5.8 Electrical wiring............................................................................................................................................................. 23
5.8.1 Supply cables and external connections passage........................................................................................................ 24
5.8.2 Opening sequence of the fuse-holder........................................................................................................................... 25
6 Calibration and operation........................................................................................................................................................ 26
6.1 Operator panel with LCD AZL 21... display for control box LME 71... with PME 71.901.............................................. 26
6.2 Operator panel with LCD display.................................................................................................................................. 27
6.3 Visualisation and programming modes......................................................................................................................... 28
6.3.1 Operation...................................................................................................................................................................... 28
6.3.2 Displaying the operating position.................................................................................................................................. 29
6.3.3 Fault messages, display errors and information........................................................................................................... 29
6.4 Info level ....................................................................................................................................................................... 30
6.4.1 Displaying the Info level................................................................................................................................................ 30
6.5 Displaying the Info values............................................................................................................................................. 31
6.5.1 Identification date.......................................................................................................................................................... 31
6.5.2 Identification number .................................................................................................................................................... 31
6.5.3 Burner identification...................................................................................................................................................... 32
6.5.4 Number of resettable start-ups ..................................................................................................................................... 32
6.5.5 Total number of start-ups.............................................................................................................................................. 33
6.5.6 End of the Info level...................................................................................................................................................... 33

20079424
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Contents
6.6 Service level..................................................................................................................................................................34
6.6.1 Displaying the Service values .......................................................................................................................................35
6.7 Parameters level ...........................................................................................................................................................36
6.7.1 Entering the password...................................................................................................................................................37
6.7.2 Backup ..........................................................................................................................................................................38
6.7.3 Restore..........................................................................................................................................................................39
6.8 Parameter modes of operation......................................................................................................................................41
6.8.1 Parameters without index, with direct display ...............................................................................................................41
6.8.2 Parameters without index, without direct display ..........................................................................................................42
6.8.3 Parameters with index, with or without direct display....................................................................................................44
7 Start-up, calibration and operation of the burner..................................................................................................................46
7.1 Notes on safety for the first start-up ..............................................................................................................................46
7.2 Adjustments prior to ignition..........................................................................................................................................46
7.3 Fan adjustment..............................................................................................................................................................46
7.3.1 Pre-setting of the points P0 (ignition), P1 (minimum) and P2 (maximum).....................................................................47
7.4 Burner start-up ..............................................................................................................................................................47
7.4.1 First burner start-up (manual operation)........................................................................................................................47
7.4.2 Checking the modulating operation (automatic operation)............................................................................................48
7.5 Burner adjustment.........................................................................................................................................................49
7.5.1 Optimum calibration values...........................................................................................................................................49
7.6 Switching off the burner.................................................................................................................................................50
7.7 Load controller inputs....................................................................................................................................................50
7.8 Combustion head..........................................................................................................................................................50
8 Maintenance ..............................................................................................................................................................................51
8.1 Notes on safety for the maintenance.............................................................................................................................51
8.2 Maintenance programme ..............................................................................................................................................51
8.2.1 Maintenance frequency.................................................................................................................................................51
8.2.2 Checking and cleaning..................................................................................................................................................51
8.3 Opening and closing the burner ....................................................................................................................................52
8.4 Recommended preventive maintenance programme ...................................................................................................53
9 Operation, indications, diagnostic..........................................................................................................................................54
9.1 Control sequence in the event of a fault........................................................................................................................54
9.2 List of error codes with operation using AZL21 Display ... ............................................................................................55
9.3 Resetting of burner control............................................................................................................................................56
9.3.1 Diagnostics of the cause of the fault .............................................................................................................................56
9.3.2 Before starting with a new program module or when the program module is replaced.................................................57
9.4 Manual reset..................................................................................................................................................................58
9.4.1 Error during the reset process.......................................................................................................................................59
9.4.2 Reset.............................................................................................................................................................................59
A List of parameters PME71.901 ...)............................................................................................................................................60
A Appendix - Accessories ...........................................................................................................................................................66
B Appendix - Electrical panel layout...........................................................................................................................................67

3
20079424
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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 burner
Model: RX 700 S/PV RX 850 S/PV
RX 1000 S/PV
These products are in compliance with the following Technical Standards:
EN 676
EN 12100
and according to the European Directives:
GAD 2009/142/EC Gas Devices Directive
MD 2006/42/EC Machine Directive
LVD 2014/35/UE Low Voltage Directive
EMC 2014/30/UE Electromagnetic Compatibility
The products are marked as follows:
The quality is guaranteed by a quality and management system certified in accordance with UNI EN ISO 9001.
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. [e-mail]
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 manufacturedand distributed in compliance with the requirements definedin the Legislative Decree ofJanuary 8th 2004 and July 17th 2009.
Type of product: Pre-mixed gas burner
Model: RX 700 S/PV RX 850 S/PV
RX 1000 S/PV
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:
RX 700 S/PV CO max: 17 mg/kWh
Max. NOx: 61 mg/kWh
RX 850 S/PV CO max: 2 mg/kWh
Max. NOx: 67 mg/kWh
RX 1000 S/PV CO max: 13 mg/kWh
Max. NOx: 66 mg/kWh
CE-0085 BT 0516 - RX 700 S/PV
CE-0085 CQ0376 - RX 850 S/PV
CE-0085 CQ0375 - RX 1000 S/PV
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 854T3 RX 700 S/PV 140 - 700 kW
926T1 RX 850 S/PV 170 - 880 kW
891T3 RX 1000 S/PV 180 - 1080 kW
Legnago, 01.12.2015 General Manager
RIELLO S.p.A. - Burners Department
Research and Development Director
RIELLO S.p.A. - Burners Department
Ing. U. Ferretti
Ing. F. Comencini

20079424
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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 DEVICES
This symbol signals the obligation to reassemble
the cover and allthe 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
20079424
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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.

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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, 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 manufacturing company
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.
➤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
20079424
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Technical description of the burner
4.1 Models available
4.2 Burner categories - Countries of destination
4.3 Technical data
Tab. A
(1)
Reference conditions: Ambient temperature 20°C - Gas temperature 15°C - Barometric pressure 1013 mbar - Altitude 0 m a.s.l.
(2)
Input gas pressure 8)(Fig. 2) with zero pressure in combustion chamber and at maximum burner output.
(3)
Sound pressure measured in manufacturer's combustion lab, with burner operating on test boiler, at maximum, average and minimum modulation
output. The sound power is measured with the “Free Field” method, as per EN 15036, and according to an accurate “Accuracy: Category 3” meas-
urement, as described in EN ISO 3746.
4 Technical description of the burner
Designation Voltage Code
RX 700 S/PV 230V - 50-60 Hz 20074586
RX 850 S/PV 230V - 50-60 Hz 20074219
RX 1000 S/PV 3N - 400V - 50-60 Hz 20050087
Country of destination Gas category
BE I2E(R)
BG, DK,EE, FI, LV, NL, NO, SE, HU I2H
DE, LU, PL I2E
BE, CY, DE, HU, MT, NL, PL I3P
AT, CH, CZ, ES, FR, GB, GR, IE, IS, IT, LT, PT, RO, SI, SK, HR II2H3P
Model RX 700 S/PV RX 850 S/PV RX 1000 S/PV
Type 854T3 926T1 891T3
Power
(1)
Delivery
(1)
min - max
min - max kW Mcal/h 140 - 700 120 - 602 170 - 880 147 - 757 180 - 1080 155 - 929
Fuels Natural gas: G20 (methane) - LPG: (G31)
Supply pressure
(2)
- mbar 17 - 65 (G20) 25 - 65 (G25)
Gas valve input diameter 1
1
/
2
”
Operation – Intermittent (min. 1 stop in 24 hours)
– Modulating
Standard applications Boilers: water, steam, diathermic oil
Ambient temperature °C 0 - 60
Auxiliary circuit electrical supply - - 1N ~ 230V 50/60 Hz
Electrical supply 1N ~ 230V +/-10% 50/60 Hz 3 ~ 400V +/-10% 50/60 Hz
Fan motor
rpm
V
kW
A
4500
230 V 50/60 Hz
0.860
4.8
6100
3 ~ 400V +/-10% 50/60 Hz
2.5
4
Ignition transformer V1 - V2
I1 - I2 230 V - 2 x 10 kV 0.3 A - 50/60 Hz 0.4 A
Absorbed electrical power kW max 1.1 1.1 3
Protection level IP 2XD
Burner weight
(without packaging)
kg
48 48 58
Noise level
(3)
dB(A)
Min. Aver-
age Max. Min. Aver- age Max. Min. Aver- age Max.
Sound pressure 50.8 62.0 70.3 50.5 59.9 68.5 50.7 65.8 74.9
Sound power 63.6 74.8 83.0 63.3 72.7 81.2 63.4 78.6 87.7

20079424
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Technical description of the burner
4.4 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 pulled back.
Tab. B
Fig. 1
20075691
mm A B C E F G H I L
RX 700 S/PV 660 490 910 520 540 367 200 370 135RX 850 S/PV 660 460
RX 1000 S/PV

9
20079424
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Technical description of the burner
4.5 Burner description
1 Combustion head
2 Ignition electrode
3 Flame sensor probe
4 Gas valve
5 Air/gas mixer in the suction line circuit
6 Gas pressure test point
7 Gas valve pipe
8 Gas input
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 Terminal board for electrical wiring
16 Transformer
17 Plate with 4 holes, useful for passing electric cables
18 Fuses
19 Programming card
20 ON/OFF selector
21 Light signalling of mains live state
22 Three-phase contactor fan/output relay
23 Display
4.6 Burner equipment
Flange for gas train . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
Screws to fix the flange . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 4
Insulating gasket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
Gas valve with flange and gas pipe . . . . . . . . . . . . . . . . . . No. 1
Mixer ring for G25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
Spare parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
Hardware for burner assembly:
M10 x 50 Stainless steel nuts (with or without tip) . . . . . . . No. 4
Zinc plated washers M10 x 16 . . . . . . . . . . . . . . . . . . . . . . No. 4
Toothed washers M10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 4
M10 Zinc-plated nuts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 4
Compensation pipe. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
13
19
15
8
7
16
17
10
21
20
23 22
46
17
12
3
9
14 12
5
11
18
20075698
Fig. 2
WARNING
Burner lockout may occur.
CONTROL BOX LOCKOUT:
if the button 13) lights up (Fig. 2) it signals that the
burner is in lockout.
Press the push button to reset.

20079424
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Technical description of the burner
4.7 Firing rates
The maximum output must not be greater than the maximum
limit of the diagram (Fig. 3 - Fig. 4 - Fig. 5).
RX 700 S/PV = 700 kW
RX 850 S/PV = 880 kW
RX 1000 S/PV = 1080 kW
The minimum output should not belower than the minimum limit
of the diagram (Fig. 3 - Fig. 4 - Fig. 5).
RX 700 S/PV = 140 kW
RX 850 S/PV = 170 kW
RX 1000 S/PV = 180 kW
The ignition output must be selected from within area A for gas
G20 - LPG.
WARNING
The firing rate (Fig. 3 - Fig. 4 - Fig. 5) has been
obtained at an ambient temperature of 20°C, at a
barometric pressure of 1013 mbar (about 0 m
a.s.l.).
Pressure in
combustion head - mbar
Thermal power – kW
RX 700 S/PV
Fig. 3
20076449
A
20075302
Thermal power – kW
RX 850 S/PV
Fig. 4
A
Pressure in
combustion head - mbar

11
20079424
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Technical description of the burner
4.7.1 Test boiler
The firing rates were set in relation to special test boilers, accord-
ing to EN 676 regulations.
4.7.2 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.
20075304
Pressure in
combustion head - mbar
Thermal power – kW
RX 1000 S/PV
Fig. 5
A
20115628
Fig. 6

20079424
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Technical description of the burner
4.8 Output supplied
The diagrams allow you to set the power output either using the
number of fan revs or using the pressure downstream of the gas
valve (Fig. 22 on page 22).
Example:
operation with Premix RX 700 S/PV
natural gas G20 PCI 9.45 kWh/Sm
3
;
pressure on point 1 = - 12 mbar (2nd chart).
The burnt output corresponds to 600 kW.
Going vertically up the 1st 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 3800 rpm
For an exact reading of the number of revs there is a kit for inter-
facing with the control box.
NOTE:
The burner can operate with LPG without any additional kit, how-
ever a different regulation of the gas valve is required. For the
G25 the supplied mixer ring for the G25 needs to be applied as
shown in Fig. 6 on page 11. Also for the RX 850 version, add the
mixer ring to the one already installed on the burner as standard.
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

             






























Fig. 7
DOC-0078539
No. of motor turns/min.
Pressure outlet gas valve - mbar
Thermal power – kW
G25
G20
LPG
RX 700 S/PV










                

                



























Fig. 8
DOC-0078538
No. of motor turns/min.
Pressure outlet gas valve - mbar
Thermal power – kW
G25
G20
LPG
RX 850 S/PV













        
  



           




























Fig. 9
DOC-0078537
No. of motor turns/min.
Pressure outlet gas valve - mbar
Thermal power – kW
G25
G20
LPG
RX 1000 S/PV

13
20079424
GB
Technical description of the burner
4.9 Burner controls (LME71... with PME71.901...)
Warnings
➤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. 11) 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. 10
S8673
Fig. 11

20079424
14
GB
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. C
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. 12
A
nfo
-
+
- +
and

15
20079424
GB
Technical description of the burner
Technical data
Tab. D
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. 5 A
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)
Cosϕ≥ 0.4
Alarm output X2-03/3
– Nominal voltage
– Nominal current
– Power factor
AC 230 V 50/60 Hz
1A
Cosϕ> 0.6
Ignition transformer X4-02 foot 3
– Nominal voltage
– Nominal current
– Power factor
AC 230 V 50/60 Hz
2A
Cosϕ> 0.4
Auxiliary output
– Nominal voltage
– Nominal current
– Power factor
AC 230 V 50/60 Hz
1A
Cosϕ> 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
Cosϕ> 0.4
Fuel valve/pilot valve X7-01 foot 3
– Nominal voltage
– Nominal current
– Power factor
AC 230 V 50/60 Hz
1A
Cosϕ> 0.4
Safety valve X6-03 foot 3
– Nominal voltage
– Nominal current
– Power factor
AC 230 V 50/60 Hz
1.5 A
Cosϕ> 0.6
Cable length Power supply line from the mains Max. 100 m (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 besized based on the fuse of theinternal unit (max. 6.3 AT).
Environmental
conditions Operation Climatic conditions
Mechanical conditions
Temperature range
Humidity
DIN EN 60721-3-3
Class 3K3
Class 3M2
-40...+60°C
< 95% RH

20079424
16
GB
Technical description of the burner
Program sequence
M
Z
V1
V2
AL
K1X2-02 Pin 3
Speed points
P2 (high-re)
P0 (ignition load)
P1 (low-re)
0 (no-load speed)
R
LR-OPEN
LR-CLOSE
Optional (LP)
if P235=1
Pmin
PLT
ION / QRA
Not active
X3-04 Pin 5
Relay
contact Function/inputs
Operating unit parameter number
LED permanent
LED ashing
tw t11 t10 t12 t3 t3n t4
Standby Startup Operation Shutdown Valve proving
if parameter
P241 =1 (ON)
Can be
parameterized
t1 TSA
432752622062522952
Relay
contact 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
Phase number
382818080147274424048363030322422212 oP: xx (act ual load in %) 74
224
t11 t8
POC
POC
Standby
speed
Prepurge speed
Ignition load speed
High-re speed
Modulation range
Low-re speed
Postpurge speed Purge speed
242 243 244 245240240240240240240
*1
*2
td4 td1 td3 td2
S8594
Fig. 13

17
20079424
GB
Technical description of the burner
Key Fig. 13:
Tab. E
Times
Tab. F
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 lamp with 3 colours
LP
Air pressure switch
LR
Load controller
LR-OPEN
Load controller OPEN
LR-CLOSE
Load controller CLOSED
M
Fan 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
R
Control 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
W
Limit pressure switch or thermostat
Z
Ignition transformer
µC µC controller
Input/output 1 signal (ON)
Input/output 2 signal (ON)
Input 1 permitted signal (ON) or 0 (OFF)
/reset
(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 ñ fuel valve 1 ON
Interval: end of safety time ñ fuel valve 2 ON
Interval: end of safety time ñ 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

20079424
18
GB
Technical description of the burner
Phases key (Fig. 13 on page 16):
Tab. G
4.9.1 Indication of the diagnostic mode
Both the reset button and the indicator lamp are on the control
panel.
There are 2 diagnostic options:
1 Visual diagnostics: Indication of the operating status or diag-
nostics of the cause of the fault
2 Diagnostics: From BCI to AZL2... operating and display unit
Visual diagnostics:
During normal operation, the various operating conditions are
shown in the form of colour codes based on the table shown be-
low (Tab. H).
Indication of the operating status
During start-up, the status indication is based on Tab. H:
Tab. H
Key (Tab. H)
Phase
number Function
LOC Switching off phase lockout
OFF Standby, awaiting heat request
oP Part 1: Load controller request OPEN
Part 2: fan motor modulation speed towards high
flame
Part 3: high flame reached
Part 4: load controller request CLOSED
Part 5: fan motor modulation speed towards low
flame
Part 6: low flame reached
10 Settling time, fan motor standby speed
21 Safety valve ON, air pressure switch in load absence
position
Check that the POC is closed and that the fan motor
speed has been reduced to 0
22 Part 1: fan motor ON
Part 2: specified time air pressure switch
Message (timeout), air pressure switch stabilisation
24 Settling time, fan motor pre-purging speed
30 Part 1: pre-purging time without flame simulation test
Part 2: pre-purging time with flame simulation test
(2.1 seconds)
36 Stabilisation time at ignition speed
38 Spark pre-ignition time
40 Post-ignition time, parameter 257 + 0.3 seconds
42 Flame detection
44 Interval: end of time for safety ignition and load con-
troller reset (modulation start)
72 Settling time speed, fan motor pre-purging speed
74 Part 1: the operation is finished, check that the post-
purging has been programmed
Part 2: post-purging time
Only with leak detection control
80 The test space is empty
81 Air pressure test
82 The test space is full
83 Gas pressure test
90 Min pressure switch open--> switching off safely
*1 Test valve, if P241 = 1 after each ON, lockout or
P234 (post-purging time) = 0 seconds
*2 Test valve, if P241 = 1 and P234 (post-purging time)
>0 seconds
The reset button (info button) is the key element
for resetting the burner control and activating/de-
activating the diagnostic functions.
The multi-colour indicator lamp is the key indica-
tor of the visual diagnostics.
Table of colour codes for multi-colour indicator lamp
Status Colour code Colour
Standby time,
other waiting modes OFF
Ignition phase,
controlled ignition blink yellow
Operation,
flame o.k. Green
Operation,
flame not o.k. Green blink
Burner start-up
extraneous light Green- Red
Undervoltage Yellow -
Red
Fault, alarm Red
Output error code
(see error code
Tab. Q on page 56) Red blinking
Diagnostics interface Redblinking
light
Heat request Yellow
New program
board Yellow Yellow - Red
nfo
Red
Yellow
Green
LED
...............................
...............................
...............................
...............................
Red
Yellow
Green
........ OFF Always on