Riello 976 T Installation, Use And Maintenance Instructions
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Riello 976 T Installation, Use And Maintenance Instructions

Gas oil/ kerosene burners
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Installation, use and maintenance instructions
Gas oil/ Kerosene burners
GB
Two stage operation
CODE
3470610 - 3470611
3470710 - 3470711
3470740 - 3470741
MODEL
RL 34 MZ
RL 44 MZ
RL 44 MZ
TYPE
976 T
977 T
978 T
2916420 (6) - 08/2014

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Summary of Contents for Riello 976 T

  • Page 1 Installation, use and maintenance instructions Gas oil/ Kerosene burners Two stage operation CODE MODEL TYPE 3470610 - 3470611 RL 34 MZ 976 T 3470710 - 3470711 RL 44 MZ 977 T 3470740 - 3470741 RL 44 MZ 978 T 2916420 (6) - 08/2014...

  • Page 3: Table Of Contents

    Contents Declaration....................................3 Information and general warnings............................4 Information about the instruction manual ........................4 Guarantee and responsibility............................5 Guidance for the use of bio fuel blends up to 10%...................... 5 Safety and prevention................................7 Introduction.................................. 7 Safety warnings................................7 Basic safety rules ................................
  • Page 4 Contents Maintenance programme ............................28 Opening the burner ..............................29 Closing the burner..............................29 Burner start-up cycle diagnostics ..........................30 Resetting the control box and using diagnostics......................30 Appendix - Accessories (optional) ............................33 Appendix - Electrical panel layout............................34 6420...

  • Page 5: Declaration

    CO max: 13 mg/kWh CO max: 11 mg/kWh NOx max: 158 mg/kWh NOx max: 173 mg/kWh Legnago, 10.10.2013 Executive Director Research & Development Director RIELLO S.p.A. - Burner Department RIELLO S.p.A. - Burner Department Mr. G. Conticini Mr. R. Cattaneo 6420...

  • Page 6: Information And General Warnings

    Information and general warnings Information and general warnings Information about the instruction manual 2.1.1 Introduction 2.1.3 Danger: live components The instruction manual supplied with the burner: This symbol indicates operations which, if not car-  is an integral and essential part of the product and must not ried out correctly, lead to electric shocks with le- be separated from it;...

  • Page 7: Guarantee And Responsibility

    All components within the hydraulic circuit suitable for manual, operating negligence, incorrect installa- bio fuel use and supplied by Riello will be identified as Bio com- tion and carrying out of non authorised modifica- patible. No warranty is given in relation to the use of components...
  • Page 8 If this is not completed then due to the hydro- In no event shall Riello (and its subsidiaries) be liable for any in- scopic nature of Bio fuel, it will effectively clean the tank,...

  • Page 9: 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 rules of safety and envisaging all the potential danger situations.

  • Page 10: Technical Description Of The Burner

    Technical description of the burner Technical description of the burner Burner designation Series : Fuel : Natural gas Gas oil Gas oil / Methane Heavy oil Size Setting : Single stage Two stage Modulating Emission : Class 1 EN267 - EN676 Class 2 EN267 - Class 2 EN676 Class 3 EN267 - EN676 Class 2 EN267...

  • Page 11: Technical Data

    Technical description of the burner Technical data MODEL RL 34 MZ RL 44 MZ RL 44 MZ Type 976 T 977 T 978 T Power 154 - 395 235 - 485 235 - 485 stage Mcal/h 132 - 340 204 - 418...

  • Page 12: Overall Dimensions

    Technical description of the burner Overall dimensions The maximum dimensions of the burner are given in Fig. 1. The maximum dimension of the burner, without casing, when open is given by measurement O. Bear in mind that inspection of the combustion head requires the burner to be opened and the rear part withdrawn on the slide bars.

  • Page 13: Test Boiler

    Technical description of the burner Test boiler The firing rate was set in relation to special test boilers in accord- Example Output 35 kg/hour: ance with the methods defined in EN 267 standards. diameter = 50 cm; length = 1.5 m. Fig.

  • Page 14: Packaging - Weight

    1 - Spare parts list In case of use with gas oil containing up to 10% Bio blend, it will be essential to use flexible oil lines suitable for bio fuel use. Please contact Riello for further information. WARNING 6420...

  • Page 15: Installation

     the absorbed electrical power (F);  the types of fuel used and the relative supply pressures (G);  the data of the burner's minimum and maximum output pos- sibilities (H) (see Firing rate) RIELLO S.p.A. I−37045 Legnago (VR) S8232 Fig. 6...

  • Page 16: Installer/Servicer Notes For The Use Of Gas Oil With Bio Blends Up To 10

     The burner hydraulic components and flexible oil lines must burner technical manual). be suitable for bio fuel use (check with Riello if in doubt).  If a Bio blend is in use the installer must seek information Riello have carefully chosen the specification of the bio...

  • Page 17: Blast Tube Length

    Installation Blast tube length The length of the blast tube must be selected according to the in- For boilers with front flue passes 10)(Fig. 9) or flame inversion dications provided by the manufacturer of the boiler, and in any chambers, protective fettling in refractory material 8) must be in- case it must be greater than the thickness of the boiler door com- serted between the boiler's fettling 9) and the blast tube 7).

  • Page 18: Nozzle Installation

    In order to guarantee that emissions do not vary, recommended RL 44 MZ Delavan 45° A Danfoss 60° S and/or alternative nozzles specified by Riello in the Instruction Delavan 45° A and warning booklet should be used. Table nozzles - gas oil...
  • Page 19 Installation 5.9.3 Nozzle assembly At this stage of installation the burner is still disassembled from the blast tube; it is therefore possible to fit two nozzles with the box spanner 1)(Fig. 11) (16 mm), after having removed the plas- tic plugs 2)(Fig. 11), fitting the spanner through the central hole in the flame stability disk.

  • Page 20: Combustion Head Adjustment

    Installation 5.10 Combustion head adjustment At this point of the installation, nozzle and pipe coupling are fixed Fix the burner to the pipe coupling with the screw 1) (Fig. 9 on to the boiler as in (Fig. 9 on page 15). The setting of the combus- page 15).

  • Page 21: Hydraulic System

    DANGER You are advised to use additional filters on the fuel supply line. Riello recommends a good quality fuel filter at the tank (Fig. 17 - Fig. 18) and a secondary filter CAUTION (100  for gas oil and 15  for kerosene) are used to protect the burner pump and nozzle from con- tamination.

  • Page 22: Hydraulic Connections

    Hydraulic system 6.1.3 Single-pipe circuit In order to obtain single-pipe working it is necessary to unscrew the return hose, remove the by-pass screw 6)(Fig. 29) and then screw the plug 7)(Fig. 29). The distance “P” must not exceed 10 meters in order to avoid subjecting the pump's seal to excessive strain;...

  • Page 23: Pump

    Bio blend, it will be essential to use flexible oil Before starting the burner, make sure that the lines suitable for bio fuel use. tank return line is not clogged. Please contact Riello for further information. WARNING Obstructions in the line could cause the seal- WARNING ing organ located on the pump shaft to break.

  • Page 24: Electrical System

    Electrical system Electrical system Notes on safety for the electrical wiring  The electrical wiring must be carried out with the electrical supply disconnected.  Electrical wiring must be carried out by qualified personnel and in compliance with the regulations currently in force in the country of destination.

  • Page 25: Electrical Wiring

    Electrical system Electrical wiring All the cables to be connected to the burner are fed through the Alternatively, if single stage operation is required, instead of grommets (Fig. 22). thermostat/pressure switch TR install a jumper lead between The use of the grommets can take various forms; by way of ex- terminals T6 and T7 of plug X4.

  • Page 26: 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, com- by qualified personnel, as indicated in this manual mand and safety devices.
  • Page 27 Start-up, calibration and operation of the burner Example: 2nd stage RL 44 MZ - 1st stage nozzle 3.00 GPH: Gas oil notch 22° aligned with index 7 (Fig. 25). RL 34 MZ RL 44 MZ When the adjustment is terminated lock the hex element 4) with kg/h mbar kg/h...

  • Page 28: Burner Operation

    Start-up, calibration and operation of the burner Burner operation 8.3.1 Burner starting Starting phases with progressive time intervals shown in sec- onds: • Control device TL closes. • After about 3s: • 0 s : The control box starting cycle begins. •...

  • Page 29: Steady State Operation

    Start-up, calibration and operation of the burner Steady state operation 8.4.1 System equipped with one control device TR Once the starting cycle has come to an end, the command of the 2nd stage solenoid valve passes on to the control device TR that controls boiler temperature or pressure.

  • Page 30: 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 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.

  • Page 31: Opening The Burner

    Maintenance Fuel tank If water or contamination is present within the fuel tank, it is es- sential that this is removed before the equipment is to be used. This is extremely important when gas oil containing Bio diesel is in use. If in doubt about how to achieve this then please contact the fuel or oil tank supplier.

  • Page 32: Burner Start-Up Cycle Diagnostics

    Maintenance Burner start-up cycle diagnostics During start-up, indication is according to the Tab. L: Sequences Colour code Pre-purging  Ignition phase  Operation, flame ok  Operating with weak flame signal  Electrical supply lower than ~ 170V  Lock-out ...
  • Page 33 Maintenance SIGNAL FAULT POSSIBLE CAUSE SOLUTION No blink The burner does 1 - No electrical power supply ... . . Close all switches - Check fuses not start 2 - A limit or safety control device is open ..Adjust or replace 3 - Control box lock-out .
  • Page 34 Maintenance SIGNAL FAULT POSSIBLE CAUSE SOLUTION The burner does 43 - Control device TR does not close ..Adjust or replace not pass to 2nd 44 - Defective control box ....Replace stage 45 - 2nd stage sol.

  • Page 35: A Appendix - Accessories (Optional)

    Appendix - Accessories (optional) Appendix - Accessories (optional) LONG COMBUSTION HEAD KIT SOUND PROOFING BOX If noise emission needs reducing even further, sound-proofing Burner Code boxes is available: RL 34 3010426 Average RL 44 3010425 Burner Box type noise Code [dB(A)](*) CLEAN CONTACT KIT RL 34 - 44...

  • Page 36: B Appendix - Electrical Panel Layout

    Appendix - Electrical panel layout Appendix - Electrical panel layout Contents Indication of references RL 34 functional diagram RL 44 - 1 phase functional diagram RL 44 - 3 phase functional diagram Electrical connections set by installer Indication of references / 1 .
  • Page 37 Appendix - Electrical panel layout 6420...
  • Page 38 Appendix - Electrical panel layout 6420...
  • Page 39 Appendix - Electrical panel layout 6420...
  • Page 40 Appendix - Electrical panel layout 6420...
  • Page 41 Appendix - Electrical panel layout WIRING DIAGRAM KEY - Electrical control box - Components on burners - Components on boiler - Capacitor - Fan motor thermal relay - Photocell - Remote lockout signalling - Manual burner arrest switch - Hour counter - Hour counter - Motor contact maker - Fan motor...
  • Page 44 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:

Rl 44 mzRl 34 mz977 t978 t34706103470611 ... Show all

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