Riello RLS 500/M MX Quick start guide

20009655 (10) - 12/2014
Installation, use and maintenance instructions
Dual fuel light oil/gas burners
Progressive two-stage or modulating operation
CODE MODEL TYPE
3899602 - 3899612 RLS 500/M MX 1300 T
GB

Translation of the original instructions

1
20009655
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Contents
1 Declarations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Information and general instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4.4 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4.5 Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4.6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4.7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.8 Overall dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.9 Firing rates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.10 Test boiler. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.11 Burner description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.12 Description of panel board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.13 Burner equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.14 Control box (LFL1.333...) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.15 Servomotor (SQM10.1....). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5 Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.1 Notes on safety for the installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.2 Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.3 Preliminary checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.4 Operation position. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.5 Removal of the locking screws from the shutter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.6 Preparing the boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.6.1 Boring the boiler plate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.6.2 Blast tube length. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.7 Securing the burner to the boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.8 Accessibility to the interior of the combustion head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.9 Position of electrodes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.10 Nozzle installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.10.1 Recommended nozzle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.11 Combustion head setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.12 Light oil supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.12.1 Double-pipe circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.12.2 The loop circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.12.3 Hydraulic connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.12.4 Pressure regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.12.5 Hydraulic system layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.12.6 Pump priming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.12.7 Burner calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.13 Gas feeding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.13.1 Gas feeding line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.13.2 Gas train. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.13.3 Gas train installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.13.4 Gas pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

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5.14 Electrical wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
5.14.1 Supply cables and external connections passage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
5.15 Calibration of the thermal relay. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
6 Start-up, calibration and operation of the burner. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
6.1 Notes on safety for the first start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
6.2 Adjustments before first firing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
6.3 Burner starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
6.4 Burner firing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
6.5 Fuel change . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
6.6 Combustion air adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
6.6.1 Maximum output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
6.6.2 Minimum output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
6.6.3 Intermediate outputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
6.7 Air/fuel adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
6.8 Servomotor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
6.9 Adjustment pressure switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
6.9.1 Air pressure switch - CO check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
6.9.2 Max. gas pressure switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
6.9.3 Min. gas pressure switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
6.10 Operation sequence of the burner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
6.10.1 Burner starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
6.10.2 Steady state operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
6.10.3 Undesired shutdown during operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
6.10.4 Firing failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
6.11 Final checks (with the burner working). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
7 Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
7.1 Notes on safety for the maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
7.2 Maintenance programme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
7.2.1 Maintenance frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
7.2.2 Checking and cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
7.3 Opening the burner. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
7.4 Closing the burner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
8 Faults - Possible causes - Solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
A Appendix - Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
B Appendix - Electrical panel layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45

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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 burner
Model: RLS 500/M MX
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 2006/95/EC Low Voltage Directive
EMC 2004/108/EC 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.
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”.
Product Type Model Power
Dual fuel light oil/gas burner 1300 T RLS 500/M MX 1120 - 5050 kW
Legnago, 03.09.2014 Executive General Manager
RIELLO S.p.A. - Burner Department Research & Development Director RIELLO S.p.A. - Burner Department
Mr. U. Ferretti Mr. R. Cattaneo
CE-0085CL0207

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Information and general instructions
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 instructions
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 HOOD AND
ALL THE SAFETY AND PROTECTION DEVIC-
ES
This symbol signals the obligation to reassemble
the hood 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.

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Information and general instructions
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 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, 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
4.3 Burner categories - Countries of destination
4 Technical description of the burner
Designation Electrical supply Starting Code
RLS 500/M MX TC 3/400/50 Star/Delta 3899602 - 3899612
Series : R
Size
Fuel : Natural gas
Light oil
Light oil / Methane
Setting :
Flame control system :
FS1
FS2 Standard (1 stop every 24 h) Continuos working (1 stop every 72 h)
Electrical supply to the system :
3/400/50
3/230/50
Auxiliary voltage :
230/50/60
110/50/60
R LS 500 M TC
Emission :
... Class 1 EN267 - EN676
MY Class 1 EN267 - Class 3 EN676
BLU Class 3 EN267 - EN676
MX Class 2 EN267
Class 3 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
EV Variable speed (with Inverter)
P Air/gas proportioning valve
BP Two-stage (light oil) / Proportioning valve (gas)
M Mechanical cam
S
L
LS
N
Head :
TC Standard head
TL Extended head
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

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Technical description of the burner
4.4 Technical data
Tab. A
(1)
Reference conditions: Ambient temperature 20°C - Gas temperature 15°C - Barometric pressure 1013 mbar - Altitude 0 m a.s.l.
(2)
Pressure at test point 5) (Fig. 4) with zero pressure in the combustion chamber and maximum burner output.
(3) Noise emission tests carried out as specified in EN 15036-1 with measurement accuracy σ = ± 1.5 dB, in the manufacturer's combustion chamber
with burner operating on test boiler at maximum output.
4.5 Electrical data
Tab. B
Model RLS 500/M MX
Type 1300 T
Output
(1)
Delivery
(1)
MIN - MAX kW
kg/h 1120/2500 - 5050 95/211 - 425
Fuel LIGHT OIL, viscosity at 20 °C: 6 mm
2
/s (1.5 °E - 6 cSt)
NATURAL GAS: G20 (methane) - G21 - G22 - G23 - G25
Gas pressure at maximum delivery
(2)
-
Gas: G20/G25 mbar 35.4/52.6
Operation - Continuous / Intermittent (min. 1 stop in 24 hours)
- Progressive two-stage or modulating by kit (see accessoires)
Pump Delivery (at 16.5 bar)
Pressure range
fuel temperature
kg/h
bar
°C max
560
6 - 30
140
Nozzles number 1
Standard applications Boilers: water, steam, diathermic oil
Room temperature °C 0 - 50
Combustion air temperature °C max 60
Noise level
(3)
Sound pressure
Sound power dB(A) 86.5 100.5
Weight kg 280
Model RLS 500/M MX
Electrical supply 3N ~ 400 V +/-10% 50 Hz
Fan motor IE2
rpm
V
kW
A
2880
400/690
12
21.2/12.2
Pump motor
rpm
V
kW
A
2870
220-240/380-415
1.5
5.9/3.4
Ignition transformer V1 - V2
I1 - I2 230 V - 2 x 5 kV 1.9 A - 35 mA
Electrical power consumption Light oil
Gas kW max 15.8 14
Protection level IP 54

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Technical description of the burner
Tab. C
4.6 Overall 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 by rotating the rear part on the hinge.
The overall dimensions of the burner when open are indicated by
L and R.
Position I is a reference for the thickness of the boiler door refrac-
tory fettling.
Tab. D
Model RLS 500/M MX
Electrical supply 3N ~ 400 V +/-10% 50 Hz
Fan motor IE3
rpm
V
kW
A
2880
400/690
12
21,8/12,6
Pump motor
rpm
V
kW
A
2870
220-240/380-415
1,5
5,9/3,4
Ignition transformer V1 - V2
I1 - I2 230 V - 2 x 5 kV 1,9 A - 35 mA
Electrical power consumption Light oil
Gas kW max 13,9 15,7
Protection level IP 54
mm A B C D E F G H I L R S
RLS 500/M MX 1325 544 164 370 605 DN80 900 890 395 1175 1055 320
D
E
F
C
IBA G
H
R
LS S
Fig. 1
D8356

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Technical description of the burner
4.7 Firing rates
MAXIMUM OUTPUT must be selected in the hatched area of the
diagram. (Fig. 2)
MINIMUM OUTPUT must not be lower than the minimum limit
shown in the diagram:
RLS 500/M MX = 1120 kW
4.8 Test boiler
The burner/boiler matching does not pose any problems if the
boiler is CE type-approved and its combustion chamber dimen-
sions are similar to those indicated in diagram (Fig. 3).
If the burner must be combined with a boiler that has not been CE
type-approved and/or its combustion chamber dimensions are
clearly smaller than those indicated in diagram (Fig. 3), consult
the manufacturer.
The firing rates were set in relation to special test boilers, accord-
ing to EN 676 regulations.
Fig. 3 indicates the diameter and length of the test combustion
chamber.
Example:
Output 3000 kW
diameter 100 cm
length 4m
MODULATION RATIO
The modulation ratio, determined using test boilers according to
standard (EN 676 for gas, EN 267 for light oil), is 2.5 : 1.
WARNING
The firing rate area values (Fig. 2) have been ob-
tained considering a surrounding temperature of
20 °C, and an atmospheric pressure of 1013 mbar
(approx. 0 m above sea level) and with the com-
bustion head adjusted as shown on page 19.
Fig. 2
Pressure in combustion chamber
mbar
Thermal output - kW
D8899
Fig. 3
Combustion chamber
D1637
m

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Technical description of the burner
4.9 Burner description
1 Lifting eyebolts
2 Fan
3 Fan motor
4 Servomotor
5 Gas pressure test point
6 Combustion head
7 Ignition electrodes
8 Flame stability disk
9 Electric panel board - cover
10 Hinge for opening burner
11 Air inlet to fan
12 Manifold
13 Thermal insulation screen for securing burner to boiler
14 Gas train flange
15 Shutter
16 Lever for movement of combustion head
17 Gears for movement of air damper
18 Air pressure switch
(differential operating type)
19 Air pressure test point
20 Maximum gas pressure switch with pressure test point
21 QRI cell
22 Air pressure test point pressure test point “+”
23 Pump
24 Pump motor
25 Minimum oil pressure switch
26 Maximum oil pressure switch
27 Pressure gauge for pressure on nozzle return
28 Nozzle delivery pressure gauge
29 Oil modulator
30 Pressure gauge attachment
8
7
156
19
16
1
17
1
9
11 20 25 30 29 23 14
28
27 26
10
24
13 5 12 21 18 22
423
D8355
Fig. 4
CAUTION
The burner can be opened either on the right or
left sides, irrespective of the side from which fuel
is supplied.
When the burner is closed, the hinge can be re-
positioned on the opposite side.

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Technical description of the burner
4.10 Description of panel board
1 Terminal strip for kits
2 Relay outlet - clean contacts
3 Ignition transformer
4 Bracket for mounting the power regulator RWF40
5 Stop push-button
6 Dial for off - automatic - manual
7 Power dial for increase - decrease of power
8 Start enabled light
9 Motor thermal cutout tripped warning light
10 Signal light for burner failure and lock-out reset button
11 Control box
12 Star-powered/delta-powered starter
13 Timer
14 Air pressure switch
15 Main supply terminal strip
16 Entry for power cables and external leads
17 Fuel selector and remote fuel selector enabling
18 Auxiliary circuits fuse
19 Servomotor plug/socket
20 Plug-socket valve /Pump motor
21 Fan motor
22 Pump motor contactor and thermal cut-out
23 Oil/gas selection relay
24 Plug-socket maximum gas pressure switch
25 Plug-socket flame sensor
NOTE
Two types of burner failure may occur:
➤Control box lock-out: if the control box 11) (Fig. 5) push-
button (red led) and the reset button 10) (Fig. 5) light up, it
indicates that the burner is in lock-out.
To reset, press the pushbutton 10) (Fig. 5).
➤Motors trip: release by pressing the push button on ther-
mal.
4.11 Burner equipment
Flange gasket. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . N. 1
Flange fixing screws M 16 x 50 . . . . . . . . . . . . . . . . . . . . . . N. 8
Thermal screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . N. 1
Screws to secure the burner flange to the boiler:
M 18 x 70 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . N. 4
Spacers (see Fig. 17). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . N. 2
Instruction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . N. 1
Spare parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . N. 1
1
23
4
5
6717 8910 11
12
13
14
15
16
16 18
19
20
21
22
23
24
25
Fig. 5
D8787

13
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Technical description of the burner
4.12 Control box (LFL1.333...)
Warnings
➤All interventions (assembly and installation operations,
assistance, etc.) must be carried out by qualified personnel.
➤Before modifying the wiring in the LFL1.333... control box
connection area, fully disconnect the system from the power
supply (omnipolar separation).
➤Protection against electrocution from the control box and all
connected electric components is obtained with the correct
assembly.
➤Before any intervention (assembly and installation opera-
tions, assistance, etc.), ensure the wiring is in order and that
the parameters are correctly set, then make 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.
➤Do not press the reset button or the remote reset button of
the control box for more than 10 seconds because this will
damage the internal relay.
For safety and reliability, comply with the following instruc-
tions:
– avoid conditions that can favour the development of conden-
sate and 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.
Use
The control box LFL1.333... is a control and supervision system
of medium and large capacity forced draught burners for intermit-
tent operation (at least one controlled shut-down every 24 hours).
Installation notes
• Check the electric wiring inside the boiler complies with the
national and local safety regulations.
• Do not confuse the powered conductors with the neutral
ones.
• Ensure that spliced wires cannot get into contact with neigh-
bouring terminals. Use adequate ferrules.
• Arrange the H.V. ignition cables separately, as far as possi-
ble from the control box and the other cables.
• When wiring the unit,make sure that AC230 V mains voltage
cables are run strictly separate from extra low-voltage cables
to avoid risks of electrical shock hazard.
•
Electrical wiring of the flame detector
It is important for signal transmission to be almost totally free
of any disturbances or loss:
• Always separate the detector cables from the other cables:
– The capacitive reactance of the line reduces the size of the
flame signal.
– Use a separate cable.
• Respect the allowed cable lengths.
• The ionisation probe is not protected against the risk of elec-
trocution. When connected to the electricity supply, the ioni-
sation probe must be protected against any accidental
contact.
• Position the ignition electrode and the ionisation probe so
that the ignition spark cannot form an arc on the probe (risk
of electric overcharge).
Technical data
Tab. E
WARNING
To avoid accidents, material or environmental
damage, observe the following instructions!
The control box LFL1.333... is a safety device!
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!
Mains voltage AC 230V -15% / +10%
Mains frequency 50 / 60 Hz ±6 %
Fuse (Internal) T6.3H250V
Primary fuse
(external) max. 10 A
Weight approx. 1 kg
Power absorption approx. AC 3.5 VA
Protection level IP40
Safety class II
Input current at terminal 1 max. 5 A continuous (peaks of
20 A / 20 ms)
Load on the control
terminals max. 4 A continuous (peaks of 20 A / 20 ms)
Environmental conditions
Operation
Climatic conditions
Mechanical conditions
Temperature range
Humidity
DIN EN 60721-3-1
Class 1K3
Class 1M2
-20...+60°C
< 95% RH
Fig. 6
S8414

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Technical description of the burner
4.13 Servomotor (SQM10.1....)
Warnings
➤All interventions (assembly and installation operations,
assistance, etc.) must be carried out by qualified personnel.
➤Before modifying the wiring in the connection area of the
servomotor, fully disconnect the burner control device from
the power supply (omnipolar separation).
➤To avoid the risk of electrocution, protect the connection ter-
minals in a suitable manner and correctly fix the cover.
➤Check the wiring is in order.
➤Falls and collisions can negatively affect the safety func-
tions. In this case, the servomotor must not be operated,
even if it displays no evident damage.
Assembly notes
• Check the relevant national safety standards are respected.
• When assembling the servomotor and connecting the damp-
er, the gears can be disengaged by means of a lever, allow-
ing the drive shaft to be easily adjusted in both directions of
rotation.
Technical data
Tab. F
WARNING
To avoid accidents, material or environmental
damage, observe the following instructions!
Avoid opening, modifying or forcing the actua-
tors.
Operating voltage AC 220...240V, 50 Hz –15 % / +10 %
AC 220 V, 60 Hz –15 % / +10 %
Auxiliary and limit switch-
es switching capacity 10 (3) A, AC 24...250 V
Angular positioning up to 160 ° (base scale)
Assembly position optional
Electrical protection IP 54, DIN 40050
Safety class GB
Weight approx. 1.7 kg
Actuator motor synchronous motor
Power absorption 9 VA
Environmental conditions:
Operation
Climatic conditions
Mechanical conditions
Temperature range
Humidity
DIN EN 60 721-3-1
Class 1K3
Class 1M2
-20...+70°C
< 95% RH
Fig. 7
S8413

15
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Installation
5.1 Notes on safety for the installation
After carefully cleaning all around the area where the burner will
be installed, and arranging the correct lighting of the environ-
ment, proceed with the installation operations.
5.2 Handling
The burner packaging includes a wooden platform, it is therefore
possible to move the burner (still packaged) with a transpallet
truck or fork lift truck.
5.3 Preliminary checks
Checking the consignment
Checking the characteristics of the burner
Check the identification label of the burner, showing:
➤the model (A) (Fig. 8) and type of burner (B);
➤the year of manufacture, in cryptographic form (C);
➤the serial number (D);
➤the data for electrical supply and the protection level (E);
➤the electrical input power (F);
➤the types of gas used and the relative supply pressures (G);
➤the data of the burner’s minimum and maximum output pos-
sibilities (H) (see Firing rate)
Warning. The output of the burner must be within the
boiler’s firing rate;
➤the category of the device/countries of destination (I).
➤light oil (L) max. viscosity
5 Installation
DANGER
All the installation, maintenance and disassembly
operations must be carried out with the electricity
supply disconnected.
WARNING
The installation of the burner must be carried out
by qualified personnel, as indicated in this manual
and in compliance with the standards and regula-
tions of the laws in force.
DANGER
Combustion air inside the boiler must be free from
hazardous mixes (e.g.: chloride, fluoride, halo-
gen); if present, it is highly recommended to carry
out cleaning and maintenance more frequently.
WARNING
The handling operations for the burner can be
highly dangerous if not carried out with the great-
est attention: keep any unauthorised people at a
distance; check the integrity and suitableness of
the available means of handling.
Check also that the area in which you are working
is empty and that there is an adequate escape
area (i.e. a free, safe area to which you can quick-
ly move if the burner should fall).
When handling, keep the load at not more than
20-25cm from the ground.
After positioning the burner near the installation
point, correctly dispose of all residual packaging,
separating the various types of material.
CAUTION
Before proceeding with the installation operations,
carefully clean all around the area where the burn-
er will be installed.
CAUTION
After removing all the packaging, check the integ-
rity of the contents. In the event of doubt, do not
use the burner; contact the supplier.
The packaging elements (wooden cage or card-
board box, nails, clips, plastic bags, etc.) must not
be abandoned as they are potential sources of
danger and pollution; they should be collected and
disposed of in the appropriate places.
WARNING
A burner label that has been tampered with, re-
moved or is missing, along with anything else that
prevents the definite identification of the burner
makes any installation or maintenance work diffi-
cult.
R.B.L.
GAS-KAASU
GAZ-AEPIO
0085
RIELLOS.p.A.
I-37045Legnago(VR)
CE
HEIZÖLFUEL
Fig. 8
D9243
A B C
ED F
HG
G H
I
L

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Installation
5.4 Operation position
5.5 Removal of the locking screws from the shutter
5.6 Preparing the boiler
5.6.1 Boring the boiler plate
Drill the combustion chamberlocking plate as shown in(Fig. 11).
The position of the threaded holes can be marked using the ther-
mal screen supplied with the burner.
5.6.2 Blast tube length
The length of the blast tube must be selected according to the in-
dications provided by the manufacturer of the boiler, and in any
case it must be greater than the thickness of the boiler door com-
plete with its fettling.
For boilers with front flue passes 1) (Fig. 12) or flame inversion
chambers, protective fettling in refractory material 5) must be in-
serted between the boiler fettling 2) and the blast tube 4).
This protective fettling must not compromise the extraction of the
blast tube.
For boilers having a water-cooled front the refractory fettling 2)-
5)(Fig. 12) is not required unless it is expressly requested by the
boiler manufacturer.
Tab. G
WARNING
➤The burner is designed to operate only in
positions 1, 2, 3 and 4 (Fig. 9).
➤Installation 1is preferable, as it is the only
one that allows the maintenance operations
as described in this manual.
➤Installations 2, 3 and 4permit operation but
make maintenance and inspection of the
combustion head more difficult.
DANGER
➤Any other position could compromise the cor-
rect operation of the appliance.
➤Installation 5is prohibited for safety reasons.
Fig. 9
2 3 4 51
D7739
WARNING
Remove the screws and the nuts 1)-2)(Fig. 10),
before installing the burner on the boiler.
Replace them with the screws 3) M12 X 25 sup-
plied with the burner.
1
2
1
2
3
3
Fig. 10
D12015
mm A B C
RLS 500/M MX 390 452 M 18
Fig. 11
D455

17
20009655
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Installation
5.7 Securing the burner to the boiler
➤Slip the thermal protection (standard equipment) onto the
blast tube 4)(Fig. 12).
➤Place entire burner on the boiler hole arranged previously,
see (Fig. 11), and fasten with the screws given as standard
equipment.
5.8 Accessibility to the interior of the combustion head
➤Open burner at hinge (Fig. 13) after removing the 4
screws 1).
➤Disconnect the wires 2) from the electrodes.
➤Disconnect the oil pipes by unscrewing the two connectors
3).
➤Unscrew the under part of the elbow 4) until it comes free of
its slot.
➤Extract the internal part 5) of the combustion head.
Prepare an adequate system of hoisting by hook-
ing onto the rings 3)(Fig. 12).
WARNING
The burner-boiler seal must be airtight.
Fig. 12
5
2
1
1
33
87
4
D8364
WARNING
While unscrewing, some fuel may leak out.
Fig. 13
1
3
4
5
2
1
D8365

20009655
18
GB
Installation
5.9 Position of electrodes
5.10 Nozzle installation
The burner complies with the emission requirements of the EN
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.
Fit the nozzle with the box spanner (24 mm), fitting the spanner
through the central hole in the flame stability disk (Fig. 15).
Nozzles with no fuel shutoff needle must be fitted on the nozzle
holder.
To set the delivery range within which the nozzle must work, noz-
zle return line fuel pressure must be adjusted according to the ta-
ble.
5.10.1 Recommended nozzle
• Fluidics type N2 50°
Intermediate flow rates may be obtained by choosing the nozzle
with a nominal flow rate slightly higher than that actually required.
Complete range of nozzles:
250 - 275 - 300 - 330 - 360 - 400 - 450.
Tab. H
WARNING
Make sure that the electrodes are positioned as
shown in (Fig. 14).
Fig. 14
mm4- 4, 5
6- 10 mm
D3510
WARNING
It is advisable to replace the nozzle once a year
during periodical maintenance.
CAUTION
The use of nozzles other than those specified by
Riello S.p.A. and inadequate regular maintenance
may result into emission limits non-conforming to
the values set forth by the regulations in force, and
in extremely serious cases, into potential hazards
to people and objects.
The manufacturing company shall not be liable for
any such damage arising from non-observance of
the requirements contained in this manual.
2 mm
Fig. 15
D8833
WARNING
➤Do not use any sealing products such as gas-
kets, sealing compound, or tape.
➤Be careful to avoid damaging the nozzle seal-
ing seat.
➤The nozzles must be screwed into place
tightly but not to the maximum torque value
provided by the wrench.
kg/h Delivery pressure
bar
Return
pressure
bar kg/h kW
250 24 9 94 1120
25 15.5 210 2500
360 24 7.5 116 1380
25 14 260 3090
400 24 8.5 153 1820
25 15 355 4220
450 24 8 164 1950
25,5 16 425 5050