Riello 854T4 Quick start guide

Installation, use and maintenance instructions
20152192 (5) - 11/2021
Premix gas burners
Modulating operation with pilot flame ignition
CODE MODEL
20148874 RX 700 S/PV 854T4
20148875 RX 850 S/PV 926T4
20148877 RX 1000 S/PV 891T4
GB

Translation of the original instructions

1 20152192
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Contents
1 Declarations................................................................................................................................................................................ 3
2 Information and general warnings............................................................................................................................................ 5
2.1 Information about the instruction manual........................................................................................................................ 5
2.1.1 Introduction..................................................................................................................................................................... 5
2.1.2 General dangers............................................................................................................................................................. 5
2.1.3 Other symbols................................................................................................................................................................. 5
2.1.4 Delivery of the system and the instruction manual ......................................................................................................... 6
2.2 Guarantee and responsibility .......................................................................................................................................... 6
3 Safety and prevention................................................................................................................................................................ 7
3.1 Introduction..................................................................................................................................................................... 7
3.2 Personnel training........................................................................................................................................................... 7
4 Technical description of the burner ......................................................................................................................................... 8
4.1 Models available............................................................................................................................................................. 8
4.2 Burner categories - Countries of destination .................................................................................................................. 8
4.3 Technical data ................................................................................................................................................................ 8
4.4 Electrical data ................................................................................................................................................................. 9
4.5 Maximum dimensions..................................................................................................................................................... 9
4.6 Burner equipment ........................................................................................................................................................... 9
4.7 Burner description......................................................................................................................................................... 10
4.8 Firing rates.................................................................................................................................................................... 11
4.9 Test boiler..................................................................................................................................................................... 12
4.10 Output supplied............................................................................................................................................................. 13
4.11 Adjustment pilot ............................................................................................................................................................ 14
4.12 Burner controls (LME71... with PME71.901...) ............................................................................................................. 18
4.12.1 Indication of the diagnostic mode ................................................................................................................................. 23
5 Installation ................................................................................................................................................................................ 24
5.1 Notes on safety for the installation................................................................................................................................ 24
5.2 Handling........................................................................................................................................................................ 24
5.3 Preliminary checks........................................................................................................................................................ 24
5.4 Operating position......................................................................................................................................................... 25
5.5 Preparing the boiler ...................................................................................................................................................... 25
5.5.1 Boring the boiler plate................................................................................................................................................... 25
5.5.2 Head length .................................................................................................................................................................. 25
5.6 Securing the burner to the boiler .................................................................................................................................. 26
5.6.1 Standard head version.................................................................................................................................................. 26
5.7 Fuel supply ................................................................................................................................................................... 27
5.7.1 Gas train ....................................................................................................................................................................... 28
5.8 Electrical wiring............................................................................................................................................................. 29
5.8.1 Supply cables and external connections passage........................................................................................................ 30
5.8.2 Opening sequence of the fuse-holder........................................................................................................................... 31
6 Calibration and operation........................................................................................................................................................ 32
6.1 Operator panel with LCD AZL 21... display for control box LME 71... with PME 71.901.............................................. 32
6.2 Operator panel with LCD display.................................................................................................................................. 33
6.3 Visualisation and programming modes......................................................................................................................... 34
6.3.1 Operation...................................................................................................................................................................... 34
6.3.2 Displaying the operating position.................................................................................................................................. 35
6.3.3 Fault messages, display errors and information ........................................................................................................... 35
6.4 Info level ....................................................................................................................................................................... 36
6.4.1 Displaying the Info level................................................................................................................................................ 36
6.5 Displaying the Info values............................................................................................................................................. 37
6.5.1 Identification date.......................................................................................................................................................... 37
6.5.2 Identification number .................................................................................................................................................... 37
6.5.3 Burner identification...................................................................................................................................................... 38

20152192 2
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Contents
6.5.4 Number of resettable start-ups......................................................................................................................................38
6.5.5 Total number of start-ups ..............................................................................................................................................39
6.5.6 End of the Info level.......................................................................................................................................................39
6.6 Service level ..................................................................................................................................................................40
6.6.1 Displaying the Service values .......................................................................................................................................41
6.7 Parameters level ...........................................................................................................................................................42
6.7.1 Entering the password...................................................................................................................................................43
6.7.2 Backup ..........................................................................................................................................................................44
6.7.3 Restore..........................................................................................................................................................................45
6.8 Parameter modes of operation......................................................................................................................................47
6.8.1 Parameters without index, with direct display ...............................................................................................................47
6.8.2 Parameters without index, without direct display ..........................................................................................................48
6.8.3 Parameters with index, with or without direct display....................................................................................................50
7 Start-up, calibration and operation of the burner ..................................................................................................................52
7.1 Notes on safety for the first start-up ..............................................................................................................................52
7.2 Adjustments prior to ignition ..........................................................................................................................................52
7.3 Fan adjustment..............................................................................................................................................................52
7.4 Pre-setting of the points P0 (ignition), P1 (minimum) and P2 (maximum).....................................................................53
7.5 Burner start-up ..............................................................................................................................................................54
7.5.1 First burner start-up (manual operation)........................................................................................................................54
7.5.2 Checking the modulating operation (automatic operation)............................................................................................55
7.6 Combustion head ..........................................................................................................................................................56
7.7 Burner adjustment .........................................................................................................................................................57
7.7.1 Indicative calibration values ..........................................................................................................................................57
7.8 Switching off the burner.................................................................................................................................................57
7.9 Load controller inputs ....................................................................................................................................................57
7.10 Final checks (with burner operating) .............................................................................................................................58
8 Maintenance ..............................................................................................................................................................................59
8.1 Notes on safety for the maintenance.............................................................................................................................59
8.2 Maintenance programme ..............................................................................................................................................59
8.2.1 Maintenance frequency .................................................................................................................................................59
8.2.2 Safety test - with gas ball valve closed..........................................................................................................................59
8.2.3 Checking and cleaning ..................................................................................................................................................59
8.2.4 Safety components........................................................................................................................................................60
8.3 Opening and closing the burner ....................................................................................................................................60
8.4 Recommended preventive maintenance programme ...................................................................................................61
9 Operation, indications, diagnostic ..........................................................................................................................................62
9.1 Control sequence in the event of a fault........................................................................................................................62
9.2 List of error codes with operation using AZL21... Display .............................................................................................63
9.3 Resetting of burner control ............................................................................................................................................64
9.3.1 Diagnostics of the cause of the fault .............................................................................................................................64
9.3.2 Before starting with a new program module or when the program module is replaced.................................................65
9.4 Manual reset..................................................................................................................................................................66
9.4.1 Error during the reset process.......................................................................................................................................67
9.4.2 Reset .............................................................................................................................................................................67
10 List of parameters PME71.901... ..............................................................................................................................................68
A Appendix - Accessories ...........................................................................................................................................................71
B Appendix - Electrical panel layout...........................................................................................................................................72

3 20152192
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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 and type:
RX 700 S/PV
RX 850 S/PV
RX 1000 S/PV
854T4
926T4
891T4
These products are in compliance with the following Technical Standards:
EN 676
EN 12100
and according to the European Directives:
GAR 2016/426/EU Gas Appliances Regulation
MD 2006/42/EC Machine Directive
LVD 2014/35/EU Low Voltage Directive
EMC 2014/30/EU Electromagnetic Compatibility
The products are marked as follows:
The quality is guaranteed by a quality and management system certified in accordance with ISO 9001:2015.
Legnago, 03.05.2021 Research & Development Director
RIELLO S.p.A. - Burner Department
Mr. F. Maltempi
CE-0123CT1618
Manufacturer's Declaration
RIELLO S.p.A. declares that the following products comply with the NOx emission limits specified by German standard “1. BIm-
SchV revision 26.01.2010”.
Product Type Model Output
Pre-mixed gas burner 854T4 RX 700 S/PV 140 - 700 kW
926T4 RX 850 S/PV 170 - 880 kW
891T4 RX 1000 S/PV 180 - 1080 kW

20152192 4
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Declarations
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
VAN MARCKE HQ
LAR Blok Z 5,
B-8511 Kortrijk (Aalbeke) BE
Tel. [phone]
e-mail: [email protected]
URL. www.vanmarcke.com
This document certifies that the series of devices specified below is in compliance with the model described in the EC Declaration of
Conformity and has been manufactured and distributed in compliance with the requirements defined in the Legislative Decree of January
8th 2004 and July 17th 2009.
Type of product: 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
RX 850 S/PV CO max: 2 mg/kWh
RX 1000 S/PV CO max: 13 mg/kWh
NOx max: 61 mg/kWh
NOx max: 67 mg/kWh
NOx max: 66 mg/kWh

5 20152192
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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 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.

20152192 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 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.

7 20152192
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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.

20152192 8
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Technical description of the burner
4.1 Models available
Tab. A
4.2 Burner categories - Countries of destination
Tab. B
4.3 Technical data
Tab. C
(1) Reference conditions: Ambient temperature 20°C - Gas temperature 15°C - Barometric pressure 1013 mbar - Altitude 0 m a.s.l.
(2) 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 1N/230/50-60 20148874
RX 850 S/PV 1N/230/50-60 20148875
RX 1000 S/PV 3/400/50-60 20148877
Country of destination Gas category
AT - CH - CZ - ES - FR - GB - GR - HR - IE - IS - IT - LT - PT - RO - SI - SK II2H3P
DE - PL I2E, I3P
NL II2EK3P
HU I2H, I3P
BE I2E(R), I3P
LU I2E
BG - DK - EE - FI - LV - NO - SE I2H
CY - MT I3P
Model RX 700 S/PV RX 850 S/PV RX 1000 S/PV
Type 854T4 926T4 891T4
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-G25 (methane) - LPG: (G31)
Supply pressure (2) - mbar 17 - 65 (G20-G31) 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 - 50
Combustion air temperature °C max 60
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

9 20152192
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Technical description of the burner
4.4 Electrical data
Tab. D
4.5 Maximum dimensions
The maximum dimensions of the burner are given in Fig. 1.
Tab. E
4.6 Burner equipment
Pilot gas train . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
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
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
Model RX 700 S/PV RX 850 S/PV RX 1000 S/PV
Auxiliary circuit electrical supply - - 1N ~ 230V +/-10% 50/60Hz
Electrical supply 1N ~ 230V +/-10% 50/60Hz 3 ~ 400V +/-10% 50/60Hz
Fan motor
rpm
V
kW
A
4500
230
0.86
4.8
6100
400
2.4
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 1.2 1.2 2.8
Protection level IP 2XD
A
B
C
E
I
H
G
FL
Fig. 1
20127945
mm ABCEFGH I L
RX 700 S/PV P 660 490 910 535 540 367 204 375 135
RX 850 S/PV P 660 490 910 535 660 490 204 375 135
RX 1000 S/PV P 660 490 910 535 660 490 204 375 135

20152192 10
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Technical description of the burner
4.7 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
24 Pilot gas train
19
4
8
7
16
17
17
21
20
23 13 10
22
15
6
12
3
914 12
5
11
24
18
20127948
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.

11 20152192
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Technical description of the burner
4.8 Firing rates
The maximum output must not be greater than the maximum
limit of the diagram (Fig. 3).
RX 700 S/PV = 700 kW
RX 850 S/PV = 880 kW
RX 1000 S/PV = 1080 kW
The minimum output should not be lower than the minimum limit
of the diagram (Fig. 3).
RX 700 S/PV = 140 kW
RX 850 S/PV = 170 kW
RX 1000 S/PV = 180 kW
Ignition is achieved by means of pilot light. The ignition output,
is chosen from within the A area (Fig. 3). Pilot system operates
correctly with specific pressure, see Tab. F.
Tab. F
Such value can be varied by means of pressure regulator
3)(Fig. 166 on page 52).
Fuel Operating pressure of pilot
G20 5 - 20
G25 5 - 26
GPL 5 - 10
WARNING
The firing rate (Fig. 3) has been obtained at an
ambient temperature of 20°C, at a barometric
pressure of 1013 mbar (about 0 m a.s.l.).
Fig. 3
RX 700 S/PV 20128691
RX 850 S/PV
RX 1000 S/PV
20128696
20128698
Pressure in combustion
chamber - mbar
Pressure in combustion
chamber - mbar
Pressure in combustion
chamber - mbar
Thermal power - kW
Thermal power - kW
Thermal power - kW

20152192 12
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Technical description of the burner
4.9 Test boiler
The firing rates were set in relation to special test boilers, accord-
ing to EN 676 regulations.
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.

13 20152192
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Technical description of the burner
4.10 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. 25 on page 27).
Example RX 700 S/PV:
– natural gas G20 PCI 9.45 kWh/Sm3
– pressure on point 1 = - 12 mbar (2nd chart)
– 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 ap-
plied as shown in Fig. 12 on page 17.
*FortheRX 850 S/PV version, add the mixer ring to the one al-
ready installed on the burner as standard.
Tab. G
Model Ring (mm)
RX 700 S/PV 5
RX 850 S/PV 7 *
RX 1000 S/PV 17
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

             

             






























Fig. 4
DOC-0078539
No. of motor turns/min.
Pressure outlet gas valve - mbar
Thermal power – kW
G25
G20
LPG
RX 700 S/PV










                

                



























Fig. 5
DOC-0078538
No. of motor turns/min.
Pressure outlet gas valve - mbar
Thermal power – kW
G25
G20
LPG
RX 850 S/PV













        
  

           




























Fig. 6
DOC-0078537
No. of motor turns/min.
Pressure outlet gas valve - mbar
Thermal power – kW
G25
G20
LPG
RX 1000 S/PV

20152192 14
GB
Technical description of the burner
4.11 Adjustment pilot
The diagrams allow to choose the optimal gas pressure at the pi-
lot according to the revolutions at the ignition (PO) and the CO2
to which you want to calibrate it.
The pressure test point to be used is shown in Fig. 7.
Pilot
pressure
test point
Pressure
adjuster
Fig. 7
S9796
27.0
25.0
23.0
21.0
19.0
17.0
15.0
13.0
11.0
9.0
7.0
5.0
3.0
700
900
1100
1300
1500
1700
1900
2100
2300
2500
2700
3300
2900
3100
700
900
1100
1300
1500
1700
1900
2100
2300
2500
2700
3300
2900
3100
700
900
1100
1300
1500
1700
1900
2100
2300
2500
2700
3300
2900
3100
29.0
27.0
25.0
23.0
21.0
19.0
17.0
15.0
13.0
11.0
9.0
7.0
5.0
3.0
29.0
27.0
25.0
23.0
21.0
19.0
17.0
15.0
13.0
11.0
9.0
7.0
5.0
3.0
29.0
RX 700 S/PV G20
No. of motor turns/min.
Pressure outlet gas pilot - mbar
No. of motor turns/min.
RX 700 S/PV LPG
RX 700 S/PV G25
20177452 Fig. 8
Pressure outlet gas pilot - mbar Pressure outlet gas pilot - mbar
No. of motor turns/min.

15 20152192
GB
Technical description of the burner
RX 850 S/PV G20
Pressure outlet gas pilot - mbarPressure outlet gas pilot - mbarPressure outlet gas pilot - mbar
20177456
700
900
1100
1300
1500
1700
1900
2100
2300
2500
2700
3300
2900
3100
700
900
1100
1300
1500
1700
1900
2100
2300
2500
2700
3300
2900
3100
700
900
1100
1300
1500
1700
1900
2100
2300
2500
2700
3300
2900
3100
27.0
25.0
23.0
21.0
19.0
17.0
15.0
13.0
11.0
9.0
7.0
5.0
3.0
29.0
29.0
27.0
25.0
23.0
21.0
19.0
17.0
15.0
13.0
11.0
9.0
7.0
5.0
3.0
29.0
27.0
25.0
23.0
21.0
19.0
17.0
15.0
13.0
11.0
9.0
7.0
5.0
3.0
Fig. 9
No. of motor turns/min.
No. of motor turns/min.
No. of motor turns/min.
RX 850 S/PV G25
RX 850 S/PV GPL

20152192 16
GB
Technical description of the burner
RX 1000 S/PV G20
Pressure outlet gas pilot - mbarPressure outlet gas pilot - mbarPressure outlet gas pilot - mbar
20177461
700
900
1100
1300
1500
1700
1900
2100
2300
2500
2700
3300
2900
3100
700
900
1100
1300
1500
1700
1900
2100
2300
2500
2700
3300
2900
3100
700
900
1100
1300
1500
1700
1900
2100
2300
2500
2700
3300
2900
3100
27.0
25.0
23.0
21.0
19.0
17.0
15.0
13.0
11.0
9.0
7.0
5.0
3.0
29.0
29.0
27.0
25.0
23.0
21.0
19.0
17.0
15.0
13.0
11.0
9.0
7.0
5.0
3.0
29.0
27.0
25.0
23.0
21.0
19.0
17.0
15.0
13.0
11.0
9.0
7.0
5.0
3.0
Fig. 10
No. of motor turns/min.
No. of motor turns/min.
No. of motor turns/min.
RX 1000 S/PV GPL
RX 1000 S/PV G25

17 20152192
GB
Technical description of the burner
Valve pre-calibration
Tab. H
* Tighten screw 1)(Fig. 11) fully home towards “-” mark, then
open it towards “+” mark, following the indications provided
in Tab. H.
** Install mixer ring for G25 fuel.
Key (Fig. 11)
1 Maximum gas flow adjustment (V1)
2 Pressure point downstream
3 Minimum gas flow adjustment (V2)
Model Fuel V1 - gas max* V2 - gas min
RX 700
G20 5.5 revs
Middle positionG25 8.5 revs **
G31 2.75 revs
RX 850
G20 8.5 revs
Middle positionG25 13.5 revs **
G31 5.5 revs
RX 1000
G20 9 revs
Middle positionG25 8 revs **
G31 4.5 revs
Fig. 11
20076453
13
2
20115628
Fig. 12

20152192 18
GB
Technical description of the burner
4.12 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. 14) 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. 13
S8673
Fig. 14