The quality is guaranteed by a quality and management system certified in accordance with UNI EN ISO 9001. Manufacturer's Declaration RIELLO S.p.A. declares that the following products comply with the NOx emission limits specified by German standard “1. BImSchV release 26.01.2010”.
During operation, burner output varies between: • a MAXIMUM OUTPUT, selected within area A, • and a MINIMUM OUTPUT, which must not be lower than the minimum limit in the diagram. RLS 190/M MZ = 550 kW Important: The FIRING RATE area values have been obtained considering a surrounding temperature of 20 °C, and an atmospheric pressure of 1000...
In order to guarantee that emissions do not vary, 21.5 82.7 91.2 99.1 1081.7 recommended and/or alternative nozzles speci- 22.0 84.6 93.3 101.4 1106.6 fied by Riello in the Instruction and warning 24.0 92.2 101.8 110.6 1207.3 booklet should be used. 26.0 99.9 110.3 119.9 1308.2 28.0...
The deliveries of the 1st and 2nd stages must be contained within the value range indicated on page 3. Use nozzles with a 60° spray angle at the rec- ommended pressure of 12 bar. As a rule the two nozzles have equal deliveries but the 1st stage nozzle may have a delivery less than 50% of the total delivery when a reduction of the counter-pressure peak is...
ADJUSTMENTS BEFORE FIRST FIRING SETTING THE COMBUSTION HEAD (light oil operation) • Combustion head setting The setting of the combustion head depends exclusively on the maximum burner output. Turn screw 5)(A) until the notch shown in dia- gram (B) is level with the front surface of flange 6)(B).
LIGHT OIL SUPPLY (A) The burner is equipped with a self-priming pump which is capable of feeding itself within the limits listed in the table at the side. The tank higher than the burner A The distance "P" must not exceed 10 meters in order to avoid subjecting the pump's seal to excessive strain;...
BURNER CALIBRATION (light-oil operation) SERVOMOTOR N.B. It is advisable to first set the burner for operating on oil and then for gas. WARNING Execute the fuel exchange when the burner is off. FIRING Set switch 1)(C)p.10 to "MAN". During the first firing, during the passage from the 1st to the 2nd stage, there is a momentary lowering of the fuel pressure caused by the fill- ing of the 2nd stage nozzle tubing.
GAS FEEDING Explosion danger due to fuel leaks in the presence of a flammable source. Precautions: avoid knocking, attri- tion, sparks and heat. Make sure that the fuel interception tap 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.
GAS PRESSURE 1 p (mbar) 2 p (mbar) The adjacent table shows minimum pressure losses along the gas supply line depending on 1100 the maximum burner output operation. 1200 The values shown in the table refer to: 1300 Natural gas G20 PCI 9.45 kWh/Sm 1400 10.8 (8.2 Mcal/Sm...
ADJUSTMENTS BEFORE FIRST FIRING (gas MIN GAS PRESSURE SWITCH MAX GAS PRESSURE SWITCH AIR PRESSURE SWITCH operation) Adjustment of the combustion head has been illustrated on page 8. In addition, the following adjustments must also be made: Open manual valves up-line from the gas train.
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1 - FIRING OUTPUT According to EN 676 Regulations: Burners with MAX output up to 120 kW Firing can be performed at the maximum opera- tion output level. Example: • Max. operation output : 120 kW • Max. firing output : 120 kW Burners with MAX output above 120 kW D791...
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3 - MIN OUTPUT Min output must be selected within the firing rate range shown on page 5. Press button 2)(A)p.15 “output reduction” until the servomotor has closed the air gate valve and the gas butterflu valve to 30° (factory set adjustment).
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5 - AIR PRESSURE SWITCH (A) AIR PRESSURE SWITCH Adjust the air pressure switch after having per- formed all other burner adjustments with the air pressure switch set to the start of the scale (A). With the burner operating at min. output, increase adjustment pressure by slowly turning the relative knob clockwise until the burner locks out.
MAINTENANCE FLAME INSPECTION WINDOW NOTES ON SAFETY FOR THE MAINTE- NANCE The periodic maintenance is essential for the good operation, safety, yield and duration of the burner. It allows you to reduce consumption and pollut- ing emissions and to keep the product in a relia- ble state over time.
Gas leaks Make sure that there are no gas leaks on the pipework between the gas meter and the burner. Gas filter Change the gas filter when it is dirty. Servomotor Disengage the cam 4)(B)p.15 from the servo- motor, by pressing and moving button 3)(A)p.16 towards the right, and turn it backwards and for- wards by hand to make sure it moves freely.
FAULTS - POSSIBLE CAUSES - SOLU- TIONS The control box is equipped with a lockout indi- Lockout indicator cator (A) that turns during the start-up pro- Start-up sequence gramme, and is visible from the small lockout b-b’ Idle stages (without contact con- window.
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SYMBOL PROBLEM POSSIBLE CAUSE RECOMMENDED REMEDY No electrical power supply Close all switches and check connections A limit or safety thermostat/pressure switch open Adjust or replace Control box lockout Release the control box Control box fuse interrupted Replace it Incorrect electrical wiring Check Defective control box Replace...
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SYMBOL PROBLEM POSSIBLE CAUSE RECOMMENDED REMEDY Faulty flame sensor Replace worn parts Burner goes into lockout dur- Air pressure switch faulty Replace ing operation Maximum gas pressure switch intervention Adjust or replace Lockout when the burner Permanent flame in the combustion head or flame Eliminate permanency of flame stops simulation...
APPENDIX Layout of electric panel board CONTENTS References layout LFL1... operational lay-out LFL1... operational lay-out LFL1... operational lay-out Electrical connections set by installer RWF40... operational lay-out References layout /1 .A 1 No. page Coordinates...
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Key to layouts Burner components Boiler components External burner components Control box Protection against radio interference Internal output power regulator RWF40 Probe with current output Device with current output for editing remote setpoint Pressure probe Pressure probe Remote setpoint voltage divider Thermocouple probe Probe Pt100 with 2 wires Probe Pt100 with 3 wires...
Riello S.p.a. declines all responsibility for changes or wiring performed in any way other than that illustrated in these diagrams. Do not invert the neutral with the phase wire in the electricity sup- ply line.