Riello RLS 160/EVi MX FS1 Quick start guide

20109570 (3) -10/2016
Installation, use and maintenance instructions
Dual fuel gas oil/ gas burners
Progressive two-stage or modulating operation
CODE MODEL TYPE
20070482 - 20070483 RLS 160/EVi MX FS1 781T2
20081715 - 20081716 RLS 200/EVi MX FS1 LS002 T2
GB

Translation of the original instructions

1
20109570
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Contents
1 Declarations................................................................................................................................................................................ 3
2 Information and general warnings............................................................................................................................................ 4
2.1 Information about the instruction manual.................................................................................................................... 4
2.1.1 Introduction.................................................................................................................................................................. 4
2.1.2 General dangers.......................................................................................................................................................... 4
2.1.3 Other symbols............................................................................................................................................................. 4
2.1.4 Delivery of the system and the instruction manual...................................................................................................... 5
2.2 Guarantee and responsibility....................................................................................................................................... 5
3 Safety and prevention................................................................................................................................................................ 6
3.1 Introduction.................................................................................................................................................................. 6
3.2 Personnel training ....................................................................................................................................................... 6
4 Technical description of the burner......................................................................................................................................... 7
4.1 Burner designation...................................................................................................................................................... 7
4.2 Models available.......................................................................................................................................................... 7
4.3 Burner categories - Countries of destination............................................................................................................... 8
4.4 Technical data............................................................................................................................................................. 8
4.5 Electrical data.............................................................................................................................................................. 8
4.6 Maximum dimensions.................................................................................................................................................. 9
4.7 Firing rates ................................................................................................................................................................ 10
4.8 Test boiler.................................................................................................................................................................. 10
4.9 Commercial boilers.................................................................................................................................................... 11
4.10 Burner equipment...................................................................................................................................................... 11
4.11 Burner description..................................................................................................................................................... 12
4.12 Control box for the air/fuel ratio (LMV 26...).............................................................................................................. 13
4.12.1 Operation sequence of the burner (gas operation) ................................................................................................... 15
4.12.2 Operation sequence of the burner (light oil operation).............................................................................................. 16
4.12.3 List of the phases (gas operation)............................................................................................................................. 17
4.12.4 List of the phases (light oil operation)........................................................................................................................ 17
4.13 Operator panel operation .......................................................................................................................................... 17
4.13.1 Description of the symbols on the display................................................................................................................. 18
4.13.2 Description of the buttons.......................................................................................................................................... 18
4.14 Servomotors.............................................................................................................................................................. 19
5 Installation ................................................................................................................................................................................ 20
5.1 Notes on safety for the installation............................................................................................................................ 20
5.2 Handling.................................................................................................................................................................... 20
5.3 Preliminary checks.................................................................................................................................................... 20
5.4 Operating position ..................................................................................................................................................... 21
5.5 Preparing the boiler................................................................................................................................................... 21
5.5.1 Boring the boiler plate ............................................................................................................................................... 21
5.5.2 Blast tube length........................................................................................................................................................ 21
5.6 Securing the burner to the boiler............................................................................................................................... 22
5.7 Nozzle ....................................................................................................................................................................... 23
5.7.1 Recommended nozzles............................................................................................................................................. 23
5.7.2 Nozzle installation ..................................................................................................................................................... 23
5.7.3 Shutter movement..................................................................................................................................................... 24
5.8 Pressure variator....................................................................................................................................................... 24
5.9 Combustion head adjustment.................................................................................................................................... 25
5.10 Electrodes adjustment............................................................................................................................................... 25
5.11 Closing the burner..................................................................................................................................................... 26
5.12 Light oil supply........................................................................................................................................................... 27
5.12.1 Double-pipe circuit..................................................................................................................................................... 27
5.12.2 The loop circuit.......................................................................................................................................................... 27
5.12.3 Hydraulic connections............................................................................................................................................... 28
5.13 Burner start-up ......................................................................................................................................................... 28
5.13.1 Pump......................................................................................................................................................................... 29
5.13.2 Priming pump............................................................................................................................................................ 29
5.13.3 Pump motor rotation.................................................................................................................................................. 29
5.14 Gas feeding............................................................................................................................................................... 30
5.14.1 Gas feeding line ........................................................................................................................................................ 30
5.14.2 Gas pressure............................................................................................................................................................. 31
5.15 Electrical wiring ......................................................................................................................................................... 32

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Contents
5.15.1 Supply cables and external connections passage.....................................................................................................32
5.16 Inverter.......................................................................................................................................................................33
5.16.1 LED status display .....................................................................................................................................................34
6 Start-up, calibration and operation of the burner..................................................................................................................35
6.1 Notes on safety for the first start-up...........................................................................................................................35
6.2 Adjustments prior to ignition (light oil)........................................................................................................................35
6.2.1 Nozzle........................................................................................................................................................................35
6.2.2 Combustion head.......................................................................................................................................................35
6.2.3 Pump pressure...........................................................................................................................................................35
6.2.4 Fan damper................................................................................................................................................................35
6.3 Operations before start-up (gas)................................................................................................................................35
6.4 Burner start-up...........................................................................................................................................................36
6.5 Change of fuel............................................................................................................................................................36
6.6 Burner adjustment......................................................................................................................................................37
6.6.1 Gas/air delivery adjustment .......................................................................................................................................37
6.6.2 Light oil/air delivery adjustment..................................................................................................................................37
6.7 Final calibration of the pressure switches..................................................................................................................37
6.7.1 Air pressure switch.....................................................................................................................................................37
6.7.2 Maximum gas pressure switch...................................................................................................................................38
6.7.3 Minimum gas pressure switch....................................................................................................................................38
6.7.4 PVP pressure switch kit .............................................................................................................................................38
6.7.5 Minimum oil pressure switch......................................................................................................................................38
6.7.6 Maximum oil pressure switch.....................................................................................................................................38
6.8 Visualisation and programming mode........................................................................................................................39
6.8.1 Normal mode .............................................................................................................................................................39
6.8.2 Info mode...................................................................................................................................................................40
6.8.3 Service mode.............................................................................................................................................................41
6.8.4 Parameters Mode ......................................................................................................................................................41
6.9 Parameter modification procedure.............................................................................................................................43
6.10 Start-up procedure.....................................................................................................................................................45
6.11 Backup / Restore procedure......................................................................................................................................47
6.11.1 Backup.......................................................................................................................................................................47
6.11.2 Restore ......................................................................................................................................................................48
6.12 List of parameters......................................................................................................................................................49
6.13 Operation...................................................................................................................................................................54
6.14 Ignition failure.............................................................................................................................................................54
6.15 Burner flame goes out during operation.....................................................................................................................55
6.16 Stopping of the burner ...............................................................................................................................................55
6.17 Final checks (with burner operating)..........................................................................................................................55
7 Maintenance ..............................................................................................................................................................................56
7.1 Notes on safety for the maintenance.........................................................................................................................56
7.2 Maintenance programme...........................................................................................................................................56
7.2.1 Maintenance frequency..............................................................................................................................................56
7.2.2 Checking and cleaning...............................................................................................................................................56
7.2.3 Checking the air and gas pressure on the combustion head.....................................................................................57
7.2.4 Measuring the flame signal........................................................................................................................................58
7.2.5 Rpm sensor adjustment.............................................................................................................................................58
7.2.6 Inverter replacement/maintenance ............................................................................................................................58
7.3 Opening the burner....................................................................................................................................................59
7.4 Closing the burner......................................................................................................................................................59
8 Faults - Probable causes - Solutions......................................................................................................................................60
8.1 List of error codes......................................................................................................................................................60
A Appendix - Accessories ...........................................................................................................................................................67
B Appendix - Electrical panel layout...........................................................................................................................................68

3
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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: Dual fuel light oil/ gas burners
Model: RLS 160/EVi MX FS1
RLS 200/EVi MX FS1
These products are in compliance with the following Technical Standards:
EN 676
EN 267
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
Such products are marked as follows:
The quality is guaranteed by a quality and management system certified in accordance with UNI EN ISO 9001.
Legnago, 01.12.2015 General Manager
RIELLO S.p.A. - Burners Department Research and Development Director RIELLO S.p.A. - Burners Department
Eng. U. Ferretti Eng. F. Comencini
0085- in progress

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Information and general warnings
2.1 Information about the instruction manual
2.1.1 Introduction
The instruction manual supplied with the burner:
➤ is an integral and essential part of the product and must not
be separated from it; it must therefore be kept carefully for
any necessary consultation and must accompany the burner
even if it is transferred to another owner or user, or to
another system. If the manual is lost or damaged, another
copy must be requested from the Technical Assistance Ser-
vice of the area;
➤ is designed for use by qualified personnel;
➤ offers important indications and instructions relating to the
installation safety, start-up, use and maintenance of the
burner.
Symbols used in the manual
In some parts of the manual you will see triangular DANGER
signs. Pay great attention to these, as they indicate a situation of
potential danger.
2.1.2 General dangers
The dangers can be of 3 levels, as indicated below.
2.1.3 Other symbols
Abbreviations used
Ch. Chapter
Fig. Figure
Page Page
Sec. Section
Tab. Table
2 Information and general warnings
DANGER
Maximum danger level!
This symbol indicates operations which, if not car-
ried out correctly, cause serious injury, death or
long-term health risks.
WARNING
This symbol indicates operations which, if not car-
ried out correctly, may cause serious injury, death
or long-term health risks.
CAUTION
This symbol indicates operations which, if not car-
ried out correctly, may cause damage to the ma-
chine and/or injury to people.
DANGER
DANGER: LIVE COMPONENTS
This symbol indicates operations which, if not car-
ried out correctly, lead to electric shocks with le-
thal consequences.
DANGER: FLAMMABLE MATERIAL
This symbol indicates the presence of flammable
materials.
DANGER: BURNING
This symbol indicates the risks of burns due to
high temperatures.
DANGER: CRUSHING OF LIMBS
This symbol indicates the presence of moving
parts: danger of crushing of limbs.
WARNING: MOVING PARTS
This symbol indicates that you must keep limbs
away from moving mechanical parts; danger of
crushing.
DANGER: EXPLOSION
This symbol signals places where an explosive at-
mosphere may be present. An explosive atmos-
phere is defined as a mixture - under atmospheric
conditions - of air and flammable substances in
the form of gases, vapours, mist or dust in which,
after ignition has occurred, combustion spreads to
the entire unburned mixture.
PERSONAL PROTECTION EQUIPMENT
These symbols indicate the equipment that must
be worn and kept by the operator for protection
against threats against safety and/or health while
at work.
OBLIGATION TO ASSEMBLE THE COVER
AND ALL THE SAFETY AND PROTECTION DE-
VICES
This symbol signals the obligation to reassemble
the cover and all the safety and protectiondevices
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.

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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 pressureof the fuel, the voltage and frequency of the
electrical power supply, the minimum and maximum deliveries for
which the burner has been regulated, the pressurisation of the
combustion chamber, the dimensions of the combustion cham-
ber and the ambient temperature must all be within the values in-
dicated in the instruction manual.
➤ Modification of the burner to alter its performance and desti-
nations is not allowed.
➤ The burner must be used in exemplary technical safety con-
ditions. Any disturbances that could compromise safety must
be quickly eliminated.
➤ Opening or tampering with the burner components is not
allowed, apart from the parts requiring maintenance.
➤ Only those parts envisaged by the manufacturer can be
replaced.
3.2 Personnel training
The user is the person, body or company that has acquired the
machine and intends to use it for the specific purpose. He is re-
sponsible for the machine and for the training of the people work-
ing around it.
The user:
➤ undertakes to entrust the machine exclusively to suitably
trained and qualified personnel;
➤ undertakes to inform his personnel in a suitable way about
the application and observance of the safety instructions.
With that aim, he undertakes to ensure that everyone knows
the use and safety instructions for his own duties;
➤ Personnel must observe all the danger and caution indica-
tions shown on the machine.
➤ Personnel must not carry out, on their own initiative, opera-
tions or interventions that are not within their province.
➤ Personnel must inform their superiors of every problem or
dangerous situation that may arise.
➤ The assembly of parts of other makes, or any modifications,
can alter the characteristics of the machine and hence com-
promise operating safety. The manufacturer therefore
declines any and every responsibility for any damage that
may be caused by the use of non-original parts.
In addition:
3 Safety and prevention
WARNING
The manufacturer guarantees safety and proper
functioning only if all burner components are intact
and positioned correctly.
➤ must take all the measures necessary to pre-
vent unauthorised people gaining access to
the machine;
➤ the user must inform the manufacturer if
faults or malfunctioning of the accident pre-
vention systems are noticed, along with any
presumed danger situation;
➤ personnel must always use the personal pro-
tective equipment envisaged by legislation
and follow the indications given in this man-
ual.

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Technical description of the burner
4.1 Burner designation
4.2 Models available
Tab. A
4 Technical description of the burner
Designation Voltage Start-up Code
RLS 160/EVi MX FS1 TC 3/400/50 Inverter 20070482
RLS 160/EVi MX FS1 TL 3/400/50 Inverter 20070483
RLS 200/EVi MX FS1 TC 3/400/50 Inverter 20081715
RLS 200/EVi MX FS1 TL 3/400/50 Inverter 20081716
Class 2 EN267 - Class 3 EN676
Range: R
Size
Fuel : Natural gas
Light oil
Light oil / Methane
Adjustment :
Flame control system :
FS1
FS2 Standard (1 stop every 24 h) Continuous operation (1 stop every 72 h)
Electrical supply of the system :
3/400/50
3/230/50
Voltage of auxiliaries :
230/50/60
110/50/60
R LS 160 EVi TC
Emission : C11 or... Class 1 EN267 - EN676
C22 or MZ Class 2 EN267 - EN676
C33 or BLU Class 3 EN267 - EN676
FS1 3/400/50 230/50/60
BASIC DESIGNATION
EXTENDED DESIGNATION
MX
3N / 400V / 50Hz
3 / 230V / 50Hz
230V / 50-60Hz
110V / 50-60Hz
Heavy oil
E Electronic cam
SV Electronic cam with variable speed (with Inverter)
P Proportional air/gas valve
BP Two stage (light oil) / Proportional valve (gas)
M Mechanical cam
S
L
LS
N
Head: TC Standard head
TL Long head
C23 or MX
C13 Class 1 EN267 - Class 3 EN676
EVi Electronic cam with integrated Inverter

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Technical description of the burner
4.3 Burner categories - Countries of destination
Tab. B
4.4 Technical data
Tab. C
(1)
Reference conditions: Ambient temperature 20°C - Gas temperature 15°C - Barometric pressure 1,013 mbar - Altitude 0 m a.s.l.
(2)
Sound pressure measured in manufacturer's combustion laboratory, with burner operating on test boiler and at maximum output. The sound power
is measured with the “Free Field” method, as per EN 15036, and according to an accurate “Accuracy: Category 3” measurement, as described in
EN ISO 3746.
4.5 Electrical data
Country of destination Gas category
SE - FI - AT - GR - DK - ES - GB - IT - IE - PT - IS - CH - NO I
2H
DE I
2ELL
NL I
2L
FR I
2Er
BE I
2E(R)B
LU - PL I
2E
Model RLS 160/EVi MX FS1 RLS 200/EVi MX FS1
Power
(1)
Delivery
(1)
min - max kW
kg/h 421/947 - 1845 35/80 - 155 401/1400 - 2322 34/118 - 196
Fuels Light oil, max. viscosity at 20 °C: 6 mm
2
/s (1.5°E - 6 cSt)
Natural gas: G20 (methane gas) - G21 - G22 - G23 - G25
Operation - Intermittent (min. 1 stop in 24 hours)
- Oil / Gas: Progressive two-stage or modulating by kit (See ACCESSO-
RIES)
Nozzles number 1
Standard applications Boilers: water, steam, diathermic oil
Ambient temperature °C 0 - 40
Combustion air temperature °C max 60
Pump output (at 20 bar)
pressure range
fuel temperature
kg/h
bar
°C max
350
7 - 40
150
Noise levels
(2)
Sound pressure
Sound power dB(A) 80.5 91.5 85 96
Weight kg 135 140
Modello RLS 160/EVi MX FS1 RLS 200/EVi MX FS1
Main electrical supply 3 ~ 400V - 50Hz +/-10%
Auxiliary circuit electrical supply 1N ~230V - 50Hz
Fan motor rpm
V
Hz
W
A
2,800
400
50
4,500
8.7
2910
380/415
50
5500
10.5
Pump motor rpm
V
Hz
W
A
2790
220/380
50
1100
4.5/2.6
Ignition transformer V1 - V2
I1 - I2 230 V - 2 x 5 kV 1.9 A - 35 mA
Max. Absorbed electric power
main electrical supply
- light oil
- gas W6646 5249 7705 6638

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Technical description of the burner
Tab. D
4.6 Maximum dimensions
The maximum dimensions of the burner are given in Fig. 1.
Bear in mind that inspection of the combustion head requires the
burner to be opened and the rear part drawn back on the slide
bars.
The dimensions of the open burner are indicated by position I.
Tab. E
(*) Blast tube: short-long
Max. Absorbed electric power
auxiliary circuit electrical supply
- light oil
- gas W500 500 500 500
Protection level IP 44
Modello RLS 160/EVi MX FS1 RLS 200/EVi MX FS1
O
I
N
G
D
H
E
F 1M
L F
B
A
C
Fig. 1
20101785
mm A B C D E F* F1* G H I* L M N O
RLS 160/EVi 895 415 480 615 880 373-503 272-402 221 445 1440-1575 221 141 262 2”
RLS 200/EVi 935 455 480 615 880 373-503 272-402 221 445 1440-1575 221 141 262 2”

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Technical description of the burner
4.7 Firing rates
The maximum output should be chosen within area A)(Fig. 2) of
the diagram.
The minimum output must not be lower than the minimum limit
of the diagram.
4.8 Test boiler
The firing rates were established in special test boilers, according
to EN 676 regulations.
In Fig. 3 you can see the diameter and length of the test combus-
tion chamber.
Example:
Output 756 kW (650 Mcal/h): diameter 60cm, length 2m.
WARNING
For model RLS 200/EVi MX
For operation within area B)(Fig. 2) advance the
shutter as shown in paragraph “Shutter move-
ment” on page 24.
WARNING
The firing rate was obtained with an ambient tem-
perature of 20°C and a barometric pressure of
1013 mbar (approx. 0m above sea level), with the
combustion head adjusted as shown on page 25.
Pressure in
combustion chamber - mbar
Thermal power Fig. 2
20101957
Fig. 3
Combustion chamber
length - m
D715

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Technical description of the burner
4.9 Commercial boilers
The burner is suitable for operating on both flame inversion boil-
ers (*), as well as on boilers with a combustion chamber with run-
off from the bottom (three flue passes) on which the best results
for low NO
x
emissions are obtained.
The boiler front door maximum thickness must not exceed 250
mm (Fig. 4).
The coupling is ensured when the boiler is EC type-approved; for
boilers or ovens with combustion chambers of very different di-
mensions compared to those shown in the diagram of (Fig. 3)
preliminary checks are recommended.
(*) For flame inversion boilers, a kit is available to reduce the CO,
if necessary.
4.10 Burner equipment
1Flange for gas train . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
Extensions for slide bars (TC version) . . . . . . . . . . . . . . . . No. 2
Extensions for slide bars (TL version) . . . . . . . . . . . . . . . . No. 4
Gasket for flange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
M10x35 screws to fix the gas flange . . . . . . . . . . . . . . . . . No. 4
Thermal insulation screen . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
Screws M16x50 to fix the burner flange to the boiler . . . . . No.4
Flexible hoses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 2
Fittings for hoses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 2
Gaskets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 2
Instruction booklet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
Spare parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 1
Fig. 4
250 mm MAX
D1079

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Technical description of the burner
4.11 Burner description
1 Combustion head
2 Ignition electrodes
3 Screw for combustion head adjustment
4 Maximum gas pressure switch
5 Pipe coupling
6 Fuel servomotor
7 “K4” relay
8 Pump motor starter
9 OFF/ON selector (0-1)
10 Terminal board for electrical wiring
11 Operator panel with LCD display
12 Control box for checking flame and air/fuel ratio
13 “K3” relay
14 Filter to protect against radio disturbance
15 Flame inspection window
16 Ignition transformer
17 Cable grommets for electrical wiring (to be carried out by the
installer)
18 Air servomotor
19 Air pressure switch
20 Slide bars for opening the burner and inspecting the com-
bustion head
21 Gas pressure test point and head fixing screw
22 Air pressure test point
23 Cell UV
24 Air damper
25 Fan air inlet
26 Screws to secure fan to pipe coupling
27 Gas input pipe
28 Gas butterfly valve
29 Boiler fixing flange
30 Flame stability disc
31 Bracket for application of output power regulator RWF50
(optional)
32 Return line valve (VR-VR1)
33 Pump motor
34 Pump
35 Safety valve
36 Working valve
37 Fan motor
38 Rpm sensor
39 Inverter
40 Inverter status led
41 Terminal board for RPM sensor and inverter
42 “K1” relay
43 “K2” relay
44 “OIL-EXT-GAS” selector
45 Terminals for earthing
46 Relay with timer “KO”
47 Relay with timer “KG”
48 Minimum oil pressure switch
49 Maximum oil pressure switch
50 Nozzle delivery pressure gauge
51 Nozzle return pressure gauge
52 6-pin socket
53 4-pin socket
54 7 pole socket
55 Lifting rings
1232152019
9
31
10
11
12
17
25
24
26
29
22
30
15
33
34
35
36
41
44
42-43
45
8
32
48
49
51
50
45
17
14
52
53 54
55
55
18
23
28
4
27
38
37
39
40
6
16
13
47
46
7
Fig. 5
20102120
Seen from “A”
A

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Technical description of the burner
4.12 Control box for the air/fuel ratio (LMV 26...)
Important notes
The control box is a system to check the burners, based on a mi-
croprocessor and equipped with components to adjust and su-
pervise medium and large capacity forced draught burners.
The control box contains the following components:
- burner management system with valve leak detection control
device;
- electronic device to check the fuel/air ratio with a maximum
of 2 actuators;
- Modbus interface.
➤All interventions (assembly and installation operations,
assistance, etc.) must be carried out by qualified personnel.
➤Before carrying out any checks on the wiring, fully isolate the
system from the electric mains (omnipolar separation).
Check the system is not powered and cannot be accidentally
reconnected. Failure to do this will lead to the risk of electro-
cution.
➤Protection against electrocution from the control box and all
connected electric components is obtained with the correct
assembly.
➤After every intervention (assembly and installation opera-
tions, assistance, etc.), ensure the wiring is in order and that
the parameters are correctly set, then perform the safety
checks.
➤Falls and collisions can negatively affect the safety func-
tions. In this case, the control box must not be operated,
even if it displays no evident damage.
➤During the programming of the air-fuel ratio control curves,
the technician should constantly observe the quality of the
combustion process (for example using a gas analyser) and,
in the event of inadequate combustion values or dangerous
conditions, should take appropriate action, for example shut-
ting down the system manually.
➤The plugs of the connection cables or other accessories can
be disconnected when the system has been switched off.
➤The connections to the actuators do not provide a secure
separation from the mains voltage. Before connecting or
changing the actuators the system should be off to avoid any
conditions that could cause the formation of condensation or
humidity. Otherwise, before switching on again, make sure
that the entire control box is perfectly dry!
➤Static charges must be avoided since they can damage the
control box’s electronic components when touched.
➤Static charges must be avoided since they can damage the
control box’s electronic components when touched.
WARNING
To avoid accidents, material and/or environmental
damage, observe the following instructions!
The control box is a safety device! Avoid opening
or modifying it, or forcing its operation. Riello
S.p.A. cannot assume any responsibility for dam-
age resulting from unauthorised interventions!
Risk of explosion!
An incorrect configuration can provoke fuel over-
charging, with the consequential risk of explosion!
The operators must be aware that the incorrect
setting of the visualisation and operation control
box, and of the positions of the fuel and/or air ac-
tuators, can cause dangerous conditions during
burner operation.
WARNING
For the safety and reliability of the control box,
comply with the following instructions:
Fig. 6
S8163

20109570
14
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Technical description of the burner
Technical data
Tab. F
Control box Mains voltage AC 230 V -15% / +10%
Mains frequency 50 / 60 Hz ±6%
Power absorption < 30 W
Safety class I, with components in compliance with II and III, ac-
cording to DIN EN 60730-1
Load on
‘input’ terminals Fuse on the control box (can be inspected) 6.3 AT
Undervoltage
- Safety switch-off from operating position to mains
voltage
- Restart when mains voltage picks up
< AC 190 V
> AC 195 V
Cable lengths - Main line AC 230 V
- Control load (TL1-TL2)
- External reset button (RS)
- Load exit (DC 0/2...10V)
- Fuel valve
- Other lines
Max. 100m (100 pF/m)
Max. 20m (100 pF/m)
Max 20 m (100 pF/m)
Max. 10m (100 pF/m)
Max. 3m (100 pF/m)
Max. 3m (100 pF/m)
Environmental
conditions Storage - Climatic conditions
- Mechanical conditions
- Temperature range
- Humidity
DIN EN 60721-3-1
Class 1K3
Class 1M2
-20 ... +60 °C
< 95% RH
Transport
- Climatic conditions
- Mechanical conditions
- Temperature range
- Humidity
DIN EN 60721-3-2
Class 2K2
Class 2M2
-30 ... +60 °C
< 95% RH
Operation
- Climatic conditions
- Mechanical conditions
- Temperature range
- Humidity
DIN EN 60721-3-3
Class 3K3
Class 3M3
-20 ... +60 °C
< 95% RH
WARNING
Condensation, the formation of ice and the entry
of water are prohibited!

15
20109570
GB
Technical description of the burner
4.12.1 Operation sequence of the burner (gas
operation)
t1 TSA1
5) 6)
27s 5s
13)
30s 0.6s
Pa
P
P
P
P
Phase number
INPUT SIGNALS
Thermostat/pressure switch
OUTPUT SIGNALS
Thermostat/pressure switch
Flame sensor
Air pressure switch PA
Min. gas pressure switch
Min. gas pressure switch
Gas pressure switch for
PGVP leak detection control
Alternative to the control
safety TS
Fan motor MV
Transformer of
Safety valve VS
Fuel valve V1
Fuel valve V2
Pilot valve VP
Lock-out signal
indicator TL
SERVOMOTORS
Air Fuel
90°
Nominal load
Pos. of post-purging
Ignition load
Low flame
Pos. without load
0°
S8870
Fig. 7
Checking of
sealSwitching off
Operation
Start-up
Timer - Resolution - Ratio
Timer 1 (parameters)
Timer 2 (parameters)
Timer 3 = max. phase time
Input signals
PGmin
PGMin
Max gas pressure switch
PGMax
CPI seal
TA ignition
90°
Nominal load
Pos. of post-purging
Ignition load
Low flame
Pos. without load
0°
RAST plug
X3-04 Pin 1/2
PIN number
X5-03 Pin 1/4
X10-05 Pin 2 Pin 3/4
X10-06 Pin 1/2
X3-02 Pin 1/2
X5-01 Pin 2/3
X5-01 Pin 2/3
X5-02 Pin 2/3
X9-04 Pin 2/3
X5-02 Pin 2/3
X3-05 Pin 1
X4-02 Pin 2/3
X6-03 Pin 2/3
X8-02 Pin 1/3
X7-01 Pin 2/3
X7-02 Pin 2/3
X3-05 Pin 2
RAST plug
PIN number
X54
X53
Signal ON
Signal OFF
Both states are allowed

20109570
16
GB
Technical description of the burner
4.12.2 Operation sequence of the burner (light oil
operation)
t1
p
P
P
5 s5 s 30 s
X3-04 Pin 1/2
X5-03 Pin 1/4
X10-05
Pin 2 / Pin 3/4
X10-06 Pin 1/2
X3-02 Pin 1/2
X5-01 Pin 2/3
X5-02 Pin 2/3
X5-02 Pin 2/3
X3-05 Pin 1
X4-02 Pin 2/3
X6-03 Pin 2/3
X8-02 Pin 1/3
X7-01 Pin 2/3
X7-02 Pin 2/3
X3-05 Pin 2
X54
X53
Phase number
INPUT SIGNALS
Thermostat/pressure switch
OUTPUT SIGNALS
Thermostat/pressure switch
Flame sensor
Air pressure switch PA
Minimum oil pressure switch
Alternative to the control
safety TS
Fan motor MV
Transformer of
Safety valve SVOIL
Fuel valve V1
Lock-out signal
indicator TL
SERVOMOTORS
Air Fuel
90°
Nominal load
Pos. of post-purging
Ignition load
Low flame
Pos. without load
0°
S9230
Fig. 8
Switching off
Operation
Start-up
Timer - Resolution - Ratio
Timer 1 (parameters)
Timer 2 (parameters)
Timer 3 = max. phase time
Input signals
POil Min.
Maximum oil pressure switch
POil Max.
CPI seal
TA ignition
90°
Nominal load
Pos. of post-purging
Ignition load
Low flame
Pos. without load
0°
RAST plug
PIN number
RAST plug
PIN number
Signal ON
Signal OFF
Both states are allowed
Fuel valve V2
Fuel valve V3

17
20109570
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Technical description of the burner
4.12.3 List of the phases (gas operation)
Tab. G
4.12.4 List of the phases (light oil operation)
Tab. H
4.13 Operator panel operation
The control box LMV 26... is connected directly to the operator
panel (Fig. 9).
The buttons allow you to programme the operation and diagnos-
tics menus.
The burner management system is shown on the LCD display
(Fig. 10). To simplify the diagnostics, the display shows the oper-
ating status, type of problem, and when the problem arose.
Phase Description
Ph00 Lockout phase
Ph02 Safety phase
Ph10 Closing paused
Ph12 Standby
Ph22 Fan motor(MV) = ON
Safety valve (VS) = ON
Ph24 The burner moves to the pre-purging position
Ph30 Pre-purging time
Ph36 The burner moves to the ignition position
Ph38 Ignition phase (TA) = ON
Ph39 Minimum gas pressure switch test (PGmin.)
Ph40 Fuel valve (V) = ON
Ph42 Ignition (TA) = OFF
Ph44 t44 = interval time 1
Ph60 Operation
Ph62 The burner moves to the switching off position
Ph70 t13 = post-combustion time
Ph72 The burner moves to the post-purging position
Ph74 t8 = post-purging time
Ph78 t3 = post-purging time
Ph80 emptying time (valve leak detection)
Ph81 Atmospheric time test (valve leak control)
Ph82 filling time (valve leak detection)
Ph83 pressure test time (valve leak detection)
Ph90 Standby time due to lack of gas
Phase Description
Ph00 Lockout phase
Ph02 Safety phase
Ph10 Closing paused
Ph12 Standby
Ph22 Fan motor(MV) = ON
Pump motor (MP) = ON
Safety valve (SVOIL) = ON
Test maximum oil pressure switch (POilmax)
Ph24 The burner moves to the pre-purging position
Ph30 Pre-purging time
Ph36 The burner moves to the ignition position
Ph38 Ignition phase (TA) = ON
Test minimum oil pressure switch (POilmin)
Ph40 Fuel valve (V) = ON
Ph42 Ignition (TA) = OFF
Ph44 t44 = interval time 1
Ph60 Operation
Ph62 The burner moves to the switching off position
Ph70 t13 = post-combustion time
Ph72 The burner moves to the post-purging position
Ph74 t8 = post-purging time
Ph78 t3 = post-purging time
WARNING
➤Observe the procedures and adjustments
shown below.
➤All interventions (assembly and installation
operations, assistance, etc.) must be carried
out by qualified personnel.
➤If the display and operator panel are dirty,
clean them with a dry cloth.
➤Protect the panel from excessive tempera-
tures and liquids.
D9001
Fig. 9

20109570
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Technical description of the burner
4.13.1 Description of the symbols on the display
The brightness of the display can be adjusted from 0 ... 100%
with the parameter 126.
4.13.2 Description of the buttons
Tab. I
Lock-out lamp
Flame presence
Valve powered
Ignition transformer
Fan motor powered
Pre-heater active
Heat request
Info mode active
Service mode active
Closure of servomotors
Opening of servomotors
Unit of measurement
Lockout
Parameter mode active
only for light oil burners
Vhmin s
D9000
powered
Fig. 10
Button Button Function
Button F To adjust the fuel servomotor
(keep pressed and adjust the value by pressing or )
Button A To adjust the air servomotor
(keep pressed and adjust the value by pressing or )
Buttons A and F
VSD function
To change the mode setting parameter P
(simultaneously press and plus or
Button Info and
Enter
•Enter in Parameters Mode
•Reset in the event of a lockout
• Access to a lower level of the menu
• To navigate in Mode Info or Service and permits:
- the selection of the parameter (flashing symbol)(press for <1 s)
- access to a lower level of the menu (press from 1...3 s)
- access to a higher level of the menu (press from 3...8 s)
- access to another Mode (press for > 8 s)
Button - Lowering the value
- Access to a lower point of the modulation curve
- Scrolling the parameter list
Button + Increasing the value
- Access to a higher point of the modulation curve
- Scrolling the parameter list
Buttons - and +
Quit function (ESC)
(press and simultaneously)
- Does not confirm the value
- Access to a higher level of the menu
F
F
A
A
VSD
AF
F
A
/reset
ESC