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Installation, use and maintenance instructions
Dual fuel light oil/gas burners
GB
Two stage operation
CODE
20159362
20159364
MODEL
RLS 28
RLS 50
TYPE
684 T80
686 T80
20165123 (1) - 07/2019

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Summary of Contents for Riello RLS 28

  • Page 1 Installation, use and maintenance instructions Dual fuel light oil/gas burners Two stage operation CODE MODEL TYPE 20159362 RLS 28 684 T80 20159364 RLS 50 686 T80 20165123 (1) - 07/2019...
  • Page 2 Translation of the original instructions...
  • Page 3: Table Of Contents

    Contents Declarations....................................3 Information and general warnings............................4 Information about the instruction manual ........................4 Guarantee and responsibility............................5 Safety and prevention................................6 Introduction.................................. 6 Personnel training ............................... 6 Technical description of the burner ............................7 Burner designation ..............................7 Models available................................
  • Page 4 Contents Maintenance ....................................37 Notes on safety for the maintenance .........................37 Maintenance programme ............................37 Opening the burner ..............................40 Closing the burner..............................40 LED indicator and special function ............................41 Description of LED lamps ............................41 Check mode function ..............................41 Flame control lock-out or emergency stop condition ....................41 LED lamps: burner operating status ..........................42 Problems - Causes - Remedies signalled by LED indicators ....................43 Appendix - Accessories ................................48...
  • Page 5: Declarations

    The quality is guaranteed by a quality and management system certified in accordance with ISO 9001:2015. Legnago, 21.04.2018 General Manager Research and Development Director RIELLO S.p.A. - Burners Department RIELLO S.p.A. - Burners Department Eng. U. Ferretti Eng. F. Comencini...
  • Page 6: Information And General Warnings

    Information and general warnings Information and general warnings Information about the instruction manual 2.1.1 Introduction DANGER: EXPLOSION The instruction manual supplied with the burner: This symbol signals places where an explosive  is an integral and essential part of the product and must not atmosphere may be present.
  • Page 7: Guarantee And Responsibility

    Information and general warnings 2.1.4 Delivery of the system and the instruction  The system supplier must carefully inform the user about: – the use of the system; manual – any further tests that may be required before activating the When the system is delivered, it is important that: system;...
  • Page 8: Safety And Prevention

    Safety and prevention Safety and prevention Introduction The burners have been designed and built in compliance with the type and pressure of the fuel, the voltage and frequency of the current regulations and directives, applying the known technical electrical power supply, the minimum and maximum deliveries for safety rules and envisaging all the potential danger situations.
  • Page 9: Technical Description Of The Burner

    110/50/60 110V / 50-60Hz 3/400/50 230/50/60 BASIC DESIGNATION EXTENDED DESIGNATION Models available Designation Voltage Start-up Code RLS 28 1/220/60 Direct 20159362 RLS 50 3/220-380/60 Direct 20159364 Burner categories - Countries of destination Country of destination Gas category SE - FI - AT - GR - DK - ES - GB - IT - IE - PT - IS - CH - NO 2ELL (43.46 ÷...
  • Page 10: Technical Data

    Technical description of the burner Technical data Model RLS 28 RLS 50 Type 684 T80 686 T80 Output 163 ÷ 325 290 ÷ 581 2nd Stage Delivery kg/h 13.7 ÷ 27.4 24.5 ÷ 49 Min. 1st Stage kg/h 12.3 Fuels –...
  • Page 11: Maximum Dimensions

    Cable grommets for electrical connection (RLS 28 single-phase) ......No. 5 Cable grommets for electrical wiring (RLS 50 three-phase) .
  • Page 12: Firing Rates

    Technical description of the burner Firing rates The burners RLS 28 - 50 can work in two ways: one-stage or two- The firing rate value (Fig. 2) has been obtained stage. considering an ambient temperature of 20 °C, an The MAXIMUM OUTPUT is chosen within area A (and B for RLS atmospheric pressure of 1013 mbar (approx.
  • Page 13: Test Boiler

    Technical description of the burner Test boiler The burner/boiler combination does not pose any problems if the The firing rates were set in relation to special test boilers, boiler is EC approved and its combustion chamber dimensions according to EN 676 and EN 267 regulations. are similar to those indicated in the diagram (Fig.
  • Page 14: Burner Description

    Technical description of the burner 4.10 Burner description 23 20 10 20166791 D1118 20166770 Fig. 4 Combustion head 13 Servomotor. When the burner is not operating the air Ignition electrodes damper is fully closed in order to reduce heat dispersion Screw for combustion head adjustment from the boiler due to the flue draught which draws air from Pipe coupling...
  • Page 15 Fig. 5 One switch for "burner on - off” one switch for “1st - 2nd stage" Fan motor contactor and thermal relay with reset button (RLS 50) Motor capacitor (RLS 28) Flame sensor LED panel Control box base 4-pole socket...
  • Page 16: 4.11 Control Box Rfgo-A22

    Technical description of the burner 4.11 Control box RFGO-A22 Important notes To avoid accidents, material or environmental damage, observe the following instructions! The control box is a safety device! Avoid opening ATTENTION or modifying it, or forcing its operation. The Manufacturer cannot assume any responsibility for damage resulting from unauthorised work! ...
  • Page 17: Servomotor (Lks 210

    Technical description of the burner 4.12 Servomotor (LKS 210 ...) Important notes Technical data To avoid accidents, material or environmental MODEL LKS 210 - 10 damage, observe the following instructions! Operating voltage 200-240V - 50/60 Hz Avoid opening, modifying forcing Switching capacity ATTENTION actuators.
  • Page 18: Installation

    Installation Installation Notes on safety for the installation After carefully cleaning all around the area where the burner is to The installation of the burner must be carried out be installed, and arranging for the environment to be illuminated by qualified personnel, as indicated in this manual correctly, proceed with the installation operations.
  • Page 19: Operating Position

    Provide an adequate lifting system. thermal insulation screen supplied with the burner.  Separate the combustion head from the rest of the burner RLS 28 (Fig. 11): RLS 50  disconnect the light oil pipes unscrewing the two unions 4).
  • Page 20: Access To Head Internal Part

    Installation Access to head internal part In order to reach inside the combustion head (Fig. 12) proceed as D1122 follows:  remove the screw 1) and the internal part 2). Be careful as some drops of fuel may leak out during this phase.
  • Page 21: Nozzle Installation

    The burner complies with the emission requirements of the EN D1122 267 standard. In order to guarantee that emissions do not vary, recommended and/or alternative nozzles specified by Riello in the Instruction and warning booklet should be used. It is advisable to replace the nozzle once a year during periodical maintenance.
  • Page 22: Combustion Head Adjustment

    Installation Combustion head adjustment 5.9.1 Adjustments prior to ignition (with light oil) The adjustment of the combustion head depends only on the maximum output of the burner in the 2nd stage.  Turn the screw 5)(Fig. 18) until the notch indicated by the diagram (Fig.
  • Page 23: Light Oil Supply

    Installation 5.10 Light oil supply Explosion danger due to fuel leaks in the presence of a flammable source. Precautions: avoid knocking, attrition, sparks and heat. Make sure the fuel shut-off valve is closed before performing any operation on the burner. The fuel supply line must be installed by qualified personnel, in compliance with current standards and laws.
  • Page 24 Installation 5.10.2 Hydraulic connections 5.10.3 Hydraulic circuit diagram  Make sure that the hoses to the pump supply and return line are installed correctly. CAUTION The pumps are equipped with a by-pass that connects return line with suction line. They are installed on the burner with the by- pass closed by screw 6)(Fig.
  • Page 25: Pump

    Installation 5.11 Pump 5.11.1 Technical data Pump SUNTEC AN 65 B Min. delivery rate at 12 bar pressure 67 kg/h Delivery pressure range 4 - 18 bar Max. suction depression 0.45 bar Viscosity range 2 - 12 cSt. Max. light oil temperature 60°C Max.
  • Page 26: Gas Supply

    Installation 5.12 Gas supply Explosion danger due to fuel leaks in the MBC “threaded” presence of a flammable source. Precautions: avoid knocking, attrition, sparks and heat. Make sure the fuel shut-off valve is closed before performing any operation on the burner. The fuel supply line must be installed by qualified personnel, in compliance with current standards and laws.
  • Page 27 Installation 5.12.2 Gas train 5.12.4 Gas pressure Type-approved in accordance with EN 676 and supplied Tab. K indicates the pressure drops of the combustion head and separately from the burner. gas butterfly valve depending on the burner operating output. To select the correct gas train model, refer to the manual "Burner- 1 p (mbar) gas train combination"...
  • Page 28 Installation Example RLS 28 with natural gas G20: 2nd stage operation Gas pressure at test point 1) (Fig. 29) 9.3 mbar Pressure in combustion chamber 2 mbar 9.3 - 2 7.3 mbar S9689 A pressure of 7.3 mbar, column 1, corresponds in the table Tab.
  • Page 29: Electrical Connections

    Installation 5.13 Electrical connections Notes on safety for the electrical wiring  The electrical wiring must be carried out with the electrical supply disconnected.  Electrical wiring must be made in accordance with the regulations currently in force in the country of destination and by qualified personnel.
  • Page 30 8), 20166769 Fig. 30 Key (Fig. 30) RLS 28 1 Pg 11 single-phase power supply 2 Pg 11 gas valves...
  • Page 31: Calibration Of The Thermal Relay

    Installation 5.14 Calibration of the thermal relay The thermal relay (Fig. 31) serves to avoid damage to the motor due to an excessive absorption increase or if a phase is missing. D8685 For calibration 2), refer to the table indicated in the electrical layout (electrical wiring by the installer).
  • Page 32: Start-Up, Calibration And Operation Of The Burner

    Start-up, calibration and operation of the burner Start-up, calibration and operation of the burner Notes on safety for the first start-up The first start-up of the burner must be carried out Check the correct working of the adjustment, by qualified personnel, as indicated in this manual command and safety devices.
  • Page 33: Adjustments Prior To Ignition (Gas)

    Start-up, calibration and operation of the burner Adjustments prior to ignition (gas) Combustion head adjustment is already described on page 20. Before starting up the burner, it is good practice to In addition, the following adjustments must also be made: adjust the gas train so that ignition takes place in ...
  • Page 34: Burner Adjustment (Gas)

    6.7.4 Operation with LPG - Propane - Butane indicated in page 10. The RLS 28 - 50 burners can operate also with LPG -Propane- Turn switch 2)(Fig. 33) to the 1st stage position: the servomotor Butane. will close the air damper on the value previously set for the light oil and will control the opening of the 1st stage VR1 gas valve.
  • Page 35: Servomotor Adjustment

    Start-up, calibration and operation of the burner Servomotor adjustment The servomotor (Fig. 38) adjusts the air damper. Do not alter (for the moment) the factory setting for the 4 levers. A graduated label with 4 coloured sectors shows the intervention point of the levers.
  • Page 36: Pressure Switch Adjustment

    Start-up, calibration and operation of the burner Pressure switch adjustment 6.9.1 Air pressure switch - check CO Adjust the air pressure switch after performing all other burner adjustments with the air pressure switch set to the start of the scale (Fig. 39). With the burner operating in 1st stage, increase adjustment pressure by slowly turning the relevant knob clockwise until the burner locks out.
  • Page 37: Operation Sequence Of The Burner

    Start-up, calibration and operation of the burner 6.10 Operation sequence of the burner 6.10.1 Burner start-up BURNER START-UP TL closes, fan motor starts, (in case of oil operation, 20141127 pump motor starts) servomotor starts, maximum opening. 11 s air damper is at its maximum opening 42 s servomotor closing phase starts at the minimum output.
  • Page 38: Final Checks (With Burner Operating)

    Start-up, calibration and operation of the burner 6.11 Final checks (with burner operating)   Open the thermostat/pressure switch TL The burner must stop  Open the thermostat/pressure switch TS  Turn the knob of the gas maximum pressure switch to the ...
  • Page 39: Maintenance

    Maintenance Maintenance Notes on safety for the maintenance The periodic maintenance is essential for the good operation, Before carrying out any maintenance, cleaning or checking safety, yield and duration of the burner. operations: It allows you to reduce consumption and polluting emissions and to keep the product in a reliable state over time.
  • Page 40 Maintenance Check to make sure that no dust has accumulated inside the fan or on its impellers, as this condition will cause a reduction in the air flow rate and provoke polluting combustion. Boiler Clean the boiler as indicated in its accompanying instructions in order to maintain all the original combustion characteristics intact, especially: the flue gas temperature and combustion chamber pressure.
  • Page 41 Maintenance LIGHT OIL OPERATION GAS OPERATION Pump Gas leaks The delivery pressure must comply with the table on page 23. Make sure that there are no gas leaks on the pipe between the The depression must be less than 0.45 bar. gas meter and the burner.
  • Page 42: Opening The Burner

    Maintenance Opening the burner Disconnect the electrical supply from the burner by means of the system main switch. D1141 DANGER Close the fuel shut-off valve. DANGER Wait for the components in contact with heat sources to cool down completely.  Remove screw 1) and extract the cover 2). ...
  • Page 43: Led Indicator And Special Function

    LED indicator and special function LED indicator and special function Description of LED lamps It turns on when the fan motor is powered (T6) and blinks when RUN/CHECK switch is set to “CHECK” during damper movement phases, PTFI AND MTFI. S9740 It blinks when the air damper is moving towards the maximum opening position until the Damper...
  • Page 44: Led Lamps: Burner Operating Status

    LED indicator and special function LED lamps: burner operating status OPERATING STATUSES INDICATED BY LEDS DURING NORMAL OPERATION AND CHECK MODE Operation Damper Damper Modulation Ignition Flame Status LED ● = ON open closed Icon S9740 S9741 S9742 S9743 S9744 S9745 S9746 Power OFF/ON...
  • Page 45: Problems - Causes - Remedies Signalled By Led Indicators

    Problems - Causes - Remedies signalled by LED indicators Problems - Causes - Remedies signalled by LED indicators When an emergency stop occurs, the control device LEDs The regulation prohibits the system from allowing indicate the cause of the stop. more than 5 remote reset attempts within a 15 The terminal T3 is not powered.
  • Page 46 Problems - Causes - Remedies signalled by LED indicators Error / RFGO LED lock-out codes Faults LED 1 LED 2 LED 3 LED 4 LED 5 LED 6 LED 7 Operation Open Closed Auto Ignition Flame Status LED ● = ON damper damper Icon...
  • Page 47 Problems - Causes - Remedies signalled by LED indicators Faults LED 1 LED 2 LED 3 LED 4 LED 5 LED 6 LED 7 Off-specification mains voltage ● ● ● ● ● UV: Internal fault ● ● Supervisor processor fault ●...
  • Page 48 Problems - Causes - Remedies signalled by LED indicators Fault explanation Faults Cause Solution Post-diagnostics fault Initial power diagnostics fault Check T12, T13 and T14 Make sure that the status of inlets and outlets is correct upon ignition Local reset The user started the manual reset or the Check T21 inlet or reset for normal reset switch is faulty...
  • Page 49 Problems - Causes - Remedies signalled by LED indicators Faults Cause Solution Internal processor timeout Internal fault Replace the control device Internal processor timeout Internal fault Replace the control device Combustion air check timeout The system could not perform verification Check the wiring or the air pressure switch tests of the combustion air during the burner sequence...
  • Page 50: A Appendix - Accessories

    Appendix - Accessories Appendix - Accessories Extended head Kit (for short head versions only) L (mm) L (mm) Burner Code Standard head Head obtainable with the kit RLS 28 20097840 RLS 50 20097869 Soundproofing box kit Burner Type dB(A) Code...
  • Page 51: B Appendix - Electrical Panel Layout

    Functional layout RFGO-A22 RLS 28 Functional layout RFGO-A22 RLS 50 Electrical wiring to be carried out by the installer RLS 28 Electrical wiring to be carried out by the installer RLS 50 Electrical wiring to be carried out by the installer RLS 50 Indication of references / 1 .
  • Page 52 Appendix - Electrical panel layout 20165123...
  • Page 53 Appendix - Electrical panel layout 20165123...
  • Page 54 Appendix - Electrical panel layout 20165123...
  • Page 55 Appendix - Electrical panel layout 20165123...
  • Page 56 Appendix - Electrical panel layout 20165123...
  • Page 57 Appendix - Electrical panel layout 20165123...
  • Page 58 Appendix - Electrical panel layout 20165123...
  • Page 59 Appendix - Electrical panel layout 20165123...
  • Page 60 Appendix - Electrical panel layout Wiring layout key Control box Pump motor capacitor Fan motor capacitor Protection fuses for three-phase line Fan motor thermal relay Remote lockout signalling Lockout signal for leak detection control 1st stage hour counter 2nd stage hour counter Fan motor contactor Relay Burner ON/OFF external switch...
  • Page 64 RIELLO S.p.A. I-37045 Legnago (VR) Tel.: +39.0442.630111 http:// www.riello.it http:// www.riello.com Subject to modifications...

This manual is also suitable for:

Rls 502015936220159364

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