Riello RL 44 MZ Installation, Use And Maintenance Instructions
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Riello RL 44 MZ Installation, Use And Maintenance Instructions

Riello RL 44 MZ Installation, Use And Maintenance Instructions

Light oil burner two-stage operation
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Installation, use and maintenance instructions
Light oil burners
GB
Two-stage operation
CODE
3470310
3470311
3470340
3470341
MODEL
RL 44 MZ
RL 44 MZ
RL 44 MZ
RL 44 MZ
20215913 (1) - 05/2024

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Summary of Contents for Riello RL 44 MZ

  • Page 1 Installation, use and maintenance instructions Light oil burners Two-stage operation CODE MODEL 3470310 RL 44 MZ 3470311 RL 44 MZ 3470340 RL 44 MZ 3470341 RL 44 MZ 20215913 (1) - 05/2024...
  • Page 2 Translation of the original instructions...

  • Page 3: Table Of Contents

    Notes on safety for the electrical wiring........................22 Electrical wiring ................................. 23 Thermal relay calibration (RL 44 MZ three phase) ....................23 Start-up, calibration and operation of the burner ......................... 24 Notes on safety for the first start-up .......................... 24 Burner calibration ..............................
  • Page 4 Contents Burner start-up cycle diagnostics ..........................31 Resetting the flame control and using diagnostics.....................31 Faults - Possible causes - Solutions............................32 Appendix - Accessories (optional) ............................34 Appendix - Electrical panel layout............................35 20215913...

  • Page 5: Declaration

    L.D. dated January 8, 2004 and July 17, 2009. Type of product: Light oil burner Model: RL 44 MZ Regulation applied: EN 267 and A.R. dated January 8, 2004 - July 17, 2009 Measured value: RL 44 MZ...

  • Page 6: Information And General Warnings

    Information and general warnings Information and general warnings Information about the instruction manual 2.1.1 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;...

  • 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 frequency of the electrical power supply, the minimum and current regulations and directives, applying the known technical maximum deliveries for which the burner has been regulated, the safety rules and envisaging all the potential danger situations.

  • Page 9: Technical Description Of The Burner

    110V / 50-60Hz 1/400/50 230/50/60 BASIC DESIGNATION EXTENDED DESIGNATION Models available Blast tube Designation Electrical supply Code length mm RL 44 MZ TC (220) 1/230/50-60 3470310 RL 44 MZ TL (355) 1/230/50-60 3470311 RL 44 MZ TC (220) 3/230-400/50-60 3470340...

  • Page 10: Technical Data

    Technical description of the burner Technical data MODEL RL 44 MZ Power 235 - 485 stage Mcal/h 204 - 418 Output kg/h 20 - 41 155 - 235 stage Mcal/h 133 - 204 kg/h 13 - 20 Fuel Light oil...

  • Page 11: Overall Dimensions

    4 - Screws to secure the burner flange to the boiler: M8 x 25 2 - Plugs for electrical connections (RL 44 MZ single-phase) 3 - Plugs for the electrical connection (RL 44 MZ three-phase) 1 - Instruction booklet 1 - Spare parts list...

  • Page 12: Firing Rates

    Technical description of the burner Firing rates The burners can work in two ways: one-stage and two-stage. S10568  1st stage output must be selected within area A of the adjacent diagrams.  2nd stage output must within area This are supplies the maximum output of the burner according to the pressure in the combustion chamber.

  • Page 13: Burner Description

    14 Flame stability disk 15 Flame inspection window 16 Extensions for slide bars 6) 17 Motor contactor and thermal RELAY reset button (RL 44 MZ three-phase) 18 Motor capacitor (RL 44 MZ single-phase) 19 Flame control with lockout pilot light and lockout reset button 20 Two switches: - one “burner off - on”...

  • Page 14: 4.10 Flame Control

    To avoid accidents, material or environmental damage, observe the following instructions! The flame control is a safety device! Avoid ATTENTION opening or modifying it, or forcing its operation. Riello S.p.A. cannot assume any responsibility for damage resulting from unauthorised interventions! ...

  • Page 15: 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 16: Operating Position

    Fig. 7 Boiler plate Drill the combustion chamber locking plate as shown in Fig. 8. The position of the threaded holes can be marked using the thermal screen supplied with the burner. RL 44 MZ Tab. D D455 Fig. 8 20215913...

  • Page 17: Blast Tube Length

    The range of lengths available, L, is as follows: blast tube. For boilers having a water-cooled front the refractory fettling 8)- Blast tube 7)(Fig. 9) RL 44 MZ 9)(Fig. 9) is not required unless it is expressly requested by the • short boiler manufacturer.

  • Page 18: Nozzle Installation

    267 standard. RL 44 MZ Delavan 45° A In order to guarantee that emissions do not vary, recommended and/or alternative nozzles specified by Riello in the Instruction Table nozzles - light oil and warning booklet should be used. kg/h 12 bar...

  • Page 19: Nozzle Assembly

    Installation 5.8.3 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. 10) (16 mm), after having removed the plastic plugs 2)(Fig. 10), fitting the spanner through the central hole in the flame stability disk.

  • Page 20: Combustion Head Adjustment

    Turn screw 1)(Fig. 14) until the notch on the sheet 2)(Fig. 14) is level with the plate 3)(Fig. 14). The RL 44 MZ Model with two 3.00 GPH nozzles and 12 bar pump pressure. Find the delivery of the two 3.00 GPH nozzles in Tab. E on page 16: 12.7 + 12.7 = 25.4 kg/h...

  • 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 D11076 tank (Fig. 16 - Fig. 17) and a secondary filter CAUTION Fig. 16 (100  for light oil) are used to protect the burner Key (Fig.

  • Page 22: Single-Pipe Circuit

    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. 28) and then screw the plug 7)(Fig. 28). The distance “P” must not exceed 10 meters in order to avoid subjecting the pump's seal to excessive strain;...

  • Page 23: Pump

    Hydraulic system Pump 6.3.2 Pump priming RL 44 MZ - PUMP SUNTEC ALV65 Before starting the burner, make sure that the tank return line is not clogged. Obstructions in the line could cause the ATTENTION sealing 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

    5 - 5AHousing for the nozzles (Drill if 5A nozzles are required) NOTE  The RL 44 MZ three-phase model leaves the factory with provision for a 400V power supply. If 230V power supply is used, change the motor connection from star to delta and change the setting of the thermal relay as well.

  • 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, by qualified personnel, as indicated in this manual command and safety devices.
  • Page 27 Start-up, calibration and operation of the burner Example: 20216693 RL 44 MZ - 1st stage nozzle 3.00 GPH: 9,2= 6,2+3 notch 22° aligned with index 7)(Fig. 24). When the adjustment is terminated lock the hex element 4) with +3 mbar the ring nut 3).

  • 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 seconds: • Control device TL closes. • After about 3s: 0 s : The flame control 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 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 31: Safety Components

    Maintenance 9.2.5 Safety components Filters (Fig. 29) The safety components must be replaced at the end of their life Check the following filter baskets: cycle indicated in Tab. J. The specified life cycles do not refer to • on line 1) • in the pump 2) • at the nozzle 3), and clean or replace the warranty terms indicated in the delivery or payment if necessary.

  • Page 32: Opening The Burner

    Maintenance Opening the burner Disconnect the electrical supply from the burner by means of the system main switch. DANGER Close the fuel shut-off valve. DANGER Wait for the components in contact with heat sources to cool down completely. – Remove screw 1)(Fig. 32) and withdraw the casing 2); –...

  • Page 33: Burner Start-Up Cycle Diagnostics

    Maintenance Burner start-up cycle diagnostics During start-up, indication is according to the Tab. K: Sequences Colour code Pre-purging  Ignition phase  Operation, flame ok  Operating with weak flame signal  Electrical supply lower than ~ 170V  Lock-out ...

  • Page 34: Faults - Possible Causes - Solutions

    Faults - Possible causes - Solutions Faults - Possible causes - Solutions Find a list of faults, causes and possible solutions for a set of fail- In the event of a burner lockout, more than two ures that may occur and result in irregular burner operation or no consecutive burner reset operations could cause functioning at all.
  • Page 35 Faults - Possible causes - Solutions SIGNAL FAULT POSSIBLE CAUSE SOLUTION 7 pulses Flame detachment Poorly adjusted head Adjust  Poorly adjusted or dirty firing electrodes Adjust Poorly adjusted fan air gate: too much air Adjust 1st nozzle is too big (pulsation) Reduce 1st nozzle delivery 1st nozzle is too small (flame detachment) Increase 1st nozzle delivery...

  • Page 36: 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 44 3010425 Average CLEAN CONTACT KIT Burner Box type noise Code [dB(A)](*) Burner Code...

  • Page 37: B Appendix - Electrical Panel Layout

    Appendix - Electrical panel layout Appendix - Electrical panel layout Contents Indication of references RL 44 - 1 phase functional diagram RL 44 - 3 phase functional diagram Electrical connections set by installer Indication of references / 1 . A1 Sheet no.

  • Page 38: Appendix - Electrical Panel Layout

    Appendix - Electrical panel layout 20215913...
  • Page 39 Appendix - Electrical panel layout 20215913...
  • Page 40 Appendix - Electrical panel layout 20215913...
  • Page 41 Appendix - Electrical panel layout WIRING DIAGRAM KEY - Flame control - Components on burners - Components on boiler - Capacitor - Fan motor thermal relay - Flame sensor - 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...

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