Contents Information and general warnings............................3 Information about the instruction manual ........................3 1.1.1 Introduction.................................. 3 1.1.2 General dangers................................3 1.1.3 Other symbols ................................3 1.1.4 Delivery of the system and the instruction manual ...................... 4 Guarantee and responsibility............................4 Safety and prevention................................
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Contents 5.4.1 Air adjustment for maximum output ...........................35 5.4.2 Air/fuel adjustment and output modulation system ....................35 5.4.3 Burner adjustment..............................35 5.4.4 Output upon ignition ..............................35 5.4.5 Maximum output ................................35 5.4.6 Minimum output .................................36 Final calibration of the pressure switches ........................36 5.5.1 Air pressure switch..............................36 5.5.2 Maximum gas pressure switch...........................37...
Information and general warnings Information and general warnings Information about the instruction manual 1.1.1 Introduction WARNING: MOVING PARTS The instruction manual supplied with the burner: This symbol indicates that you must keep limbs is an integral and essential part of the product and must not away from moving mechanical parts;...
Information and general warnings 1.1.4 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;...
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 rules of safety and envisaging all the potential danger situations.
Technical description of the burner Technical description of the burner Burner designation Range: R Fuel: Natural gas Light Oil LS Light Oil/Natural gas Heavy Oil Size: Adjustment: Two stage (light oil / proportional valve (gas) Mechanical cam Electronic Cam Electronic cam and variable speed (with Inverter) Electronic cam with integrated Inverter Electronic cam and suitable for Oxygen Control (O EV O...
Technical description of the burner Maximum dimensions The dimensions of the burner are shown in Fig. 1. The dimensions of the open burner are indicated by position U. Bear in mind that inspection of the combustion head requires the burner to be opened and the rear part drawn back on the guides. 20209033 Fig.
The maximum output must be higher than the following values If the chosen maximum output is higher than the following va- (Tab. F): lues (Tab. G): Model Model RS 68/EV O2 ULX RS 68/EV O2 ULX RS 120/EV O2 ULX RS 120/EV O2 ULX 1175 RS 160/EV O2 ULX...
Technical description of the burner Test boiler The firing rates were obtained in special test boilers, according to Although combination is guaranteed when boiler has a CE type- EN 676 standard. In Fig. 6 you can see the diameter and length approval, preliminary tests are recommended for boilers or of the test combustion chamber.
Technical description of the burner 3.10 Burner description 20209069 Fig. 7 Lifting rings Wait for the components in contact with heat sources to cool down completely. Fan motor Air damper servomotor Combustion head gas pressure test point Combustion head Ignition electrodes Ionisation probe Electrical panel cover 10 Gas butterfly valve servomotor...
Technical description of the burner 3.11 Electrical panel description 20209092 Fig. 8 Flame control Ignition transformer Suppressor Operation switch “ON/OFF” Air pressure switch (differential type) Cable grommets for electrical connections to be carried out by the installer Terminal board for electrical connections Operator panel with LCD display Relay with clean contacts 10 Button “EMERGENCY STOP”...
The LMV52... flame control is a safety device! WARNING Avoid opening or modifying it, or forcing its opera- tion. Riello S.p.A. cannot assume any responsibil- ity for damage resulting from unauthorised interventions! Risk of explosion!
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Technical description of the burner Electrical connection of flame sensor It is important for signal transmission to be almost totally free – Line capacitance reduces the magnitude of the flame signal. of any disturbances or loss: – Use a separate cable. •...
Technical description of the burner 3.13 Actuator Warning notes To avoid injury to persons, damage to prop- erty or the environment, the following warn- ing notes should be observed! WARNING Do not open, interfere with or modify the ac- tuators! ...
Technical description of the burner 3.14 PLL52... module (optional) Warnings To avoid accidents, material or environmen- tal damage, observe the following instruc- tions! WARNING Avoid opening, modifying or forcing the de- vice. All interventions (assembly and installation operations, assistance, etc.) must be carried out by qualified personnel. ...
Technical description of the burner 3.15 Oxygen sensor QGO20 ... (optional) Warnings To avoid accidents, material or environmen- S9895 tal damage, observe the following instruc- tions! WARNING Avoid opening, modifying or forcing the oxy- gen sensor. All interventions (assembly and installation operations, assistance, etc.) must be carried out by qualified personnel.
Technical description of the burner 3.15.1 Technical data QGO20 Operating voltage of measuring cell’s: – QGO20.000D27 AC 230 V ±15 % – QGO20.000D17 AC 120 V °15 % (only with LMV52 ... with PLL52...) Mains frequency: 50...60 Hz ±6 % Power consumption: Max.
Installation Installation Notes on safety for the installation After carefully cleaning all around the area where the burner will The installation of the burner must be carried out be installed, and arranging the correct lighting of the environ- by qualified personnel, as indicated in this manual ment, proceed with the installation operations.
This protective fettling must not compromise the extraction of the Ø blast tube. RS 68/EV O2 ULX M 16 For boilers with a water-cooled front piece, a refractory lining 11)- 12)(Fig. 16) is not necessary, unless expressly requested by the...
Installation Securing the burner to the boiler 20209164 Provide an adequate lifting system of the burner. Divide the combustion head from the rest of the burner, as shown in Fig. 16; you have to: loosen the 4 screws 3) and remove the cover 1); ...
4.9.1 Central gas setting The factory setting for the central gas is with the following passa- ge holes of the disc 1) in Fig. 20. RS 68/EV O2 ULX 7 mm RS 120/EV O2 ULX 10.5 mm RS 160/EV O2 ULX...
4.10 Combustion head adjustment At this point of the installation, the combustion head is fixed to the RS 68/EV O2 ULX boiler as shown in Fig. 17 on page 22. It is therefore especially S10260 easy to adjust, and this adjustment depends only on the maxi- mum output of the burner.
Installation 4.11 Closing the burner Once the combustion head adjustment is completed: 20209347 reassemble the burner on the slide bars 3) at about 100 mm from the pipe coupling 4) burner in the position shown in Fig. 16 on page 22; ...
Installation 4.12 Gas feeding Explosion danger due to fuel leaks in the pres- The fuel supply line must be installed by qualified ence of a flammable source. personnel, in compliance with current standards and laws. Precautions: avoid knocking, attrition, sparks and WARNING heat.
Installation 4.12.4 Gas pressure Example RS 200/EV O2 ULX with G20 natural gas: Fixed Output operation Each diagram indicate the minimum pressure drops depending on the maximum burner output. Gas pressure at test point P1 108 mbar The values shown, refer to: Pressure in combustion chamber 8 mbar –...
Installation 4.13 Electrical wiring 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.
Installation 4.13.1 Supply cables and external connections 20099843 passage All the cables to be connected to the burner must be threaded through cable grommets. The use of the cable grommets can take various forms; by way of example see Fig. 29. Key (Fig.
Installation 4.14 Adjustment fan motor covering with external rpm To calibrate the rpm sensor 6)(Fig. 31), proceed as follows: remove the cover 1) unscrewing the screws 2); unscrew or screw the nuts 3) - 5) and the rpm detection disc 4) so that its distance from the rpm sensor 6) is about 2 mm.;...
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, com- by qualified personnel, as indicated in this manual mand and safety devices.
Start-up, calibration and operation of the burner Burner start-up Feed electricity to the burner via the disconnecting switch on the boiler panel. 20209364 Close thermostats/pressure switches turn switch 4)(Fig. 8 on page 13) to position “(1) - ON”. Check that the lamps or testers connected to the solenoid valves, or the pilot lights on the solenoid valves, indicate that no voltage is present.
Start-up, calibration and operation of the burner Air / fuel adjustment 5.4.4 Output upon ignition Air/fuel synchronisation is carried out with the relevant air and gas servomotors by logging a calibration curve by using the elec- Ignition must occur at a lower output than the max. operation out- tronic cam.
Start-up, calibration and operation of the burner Indication for the burner ignition To determine the calibrations to use at the first start, proceed as follows: In Tab. N the calibrations of the air and gas servomotors at the Determine the maximum power required by the burner. ignition point for each model are summarized according to the Open the combustion head as indicated in Fig.
Start-up, calibration and operation of the burner 5.5.2 Maximum gas pressure switch Adjust the maximum gas pressure switch (Fig. 35) after making all other burner adjustments with the maximum gas pressure switch set to the end of the scale. To calibrate the maximum gas pressure switch, open the tap and then connect a pressure gauge to its pressure test point.
Start-up, calibration and operation of the burner 5.5.3 Minimum gas pressure switch Adjust the minimum gas pressure switch (Fig. 36) after having adjusted the burner, the gas valves and the gas train stabiliser. With the burner operating at maximum output: –...
Start-up, calibration and operation of the burner Operation Once the start-up cycle is completed, the servomotor command The burner stops when the heat request is less than the heat moves on to the thermostat/pressure switch TR that controls the supplied by the burner at MIN output.
Start-up, calibration and operation of the burner 5.11 Description of O trim control (optional) A special feature of the LMV52… is control of the residual O content to increase the boiler’s efficiency. The LMV52… uses a QGO20…, an external PLL52…, and the standard components of the LMV51…...
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 oper- safety, yield and duration of the burner. ations: It allows you to reduce consumption and polluting emissions and to keep the product in a reliable state over time.
Maintenance 6.2.5 Checking the air and gas pressure on the Gas leaks Make sure that there are no gas leaks on the pipes between the combustion head gas meter and the burner. To carry out this operation a pressure gauge must be used to measure the air and gas pressure at the combustion head, as Gas filter shown in Fig.
Maintenance Opening the burner Loosen the 4 screws 1)(Fig. 41) and remove the cover 2); assemble the two extensions supplied on the slide bars 4) Disconnect the electrical supply from the burner and tighten the screws 7); by means of the main system switch. ...
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Appendix - Electrical panel layout Wiring layout key Flame control O2 module PLL.. type Display and calibration unit Output probe in current Device with output undercurrent, for modifying re- mote setpoint Load indicator Input in current DC 4...20 mA Pressure probe Pressure probe Probe Pt100, 3 wires Probe Pt100, 3 wires...