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Summary of Contents for Riello 908T4
- Page 1 Installation, use and maintenance instructions Premix gas burners Modulating operation with pilot flame ignition CODE MODEL TYPE 20160021 RX 180 S/PV 908T4 20160022 RX 250 S/PV 903T4 20160576 (2) - 02/2020...
- Page 2 Translation of the original instructions...
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Page 3: Table Of Contents
Contents Declarations....................................3 Information and general warnings............................4 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 Guarantee and responsibility ............................5 Safety and prevention................................ - Page 4 Contents 6.5.2 Identification number ..............................34 6.5.3 Burner identification...............................35 6.5.4 Number of resettable start-ups ............................35 6.5.5 Total number of start-ups ..............................36 6.5.6 End of the Info level...............................36 Service level ..................................37 6.6.1 Displaying the Service values ............................38 Parameters level ................................39 6.7.1 Entering the password..............................40 6.7.2 Backup ..................................41 6.7.3 Restore..................................42 Parameter modes of operation ............................44...
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Page 5: Declarations
The quality is guaranteed by a quality and management system certified in accordance with ISO 9001:2015. Legnago, 21.04.2018 Executive General Manager Research & Development Director RIELLO S.p.A. - Burner Department RIELLO S.p.A. - Burner Department Mr. U. Ferretti Mr. F. Comencini... -
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: Delivery Of The System And The Instruction Manual
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 When the system is delivered, it is important that: the system;... -
Page 8: 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 9: Technical Description Of The Burner
Technical description of the burner Technical description of the burner Models available Designation Voltage Code RX 180 S/PV 230V - 50-60 Hz 20160021 RX 250 S/PV 230V - 50-60 Hz 20160022 Burner categories - Countries of destination Country of destination Gas category AT - CH - CZ - ES - FR - GB - GR - HR - IE - IS - IT - LT - PT - RO - SI - SK II2H3P... -
Page 10: Technical Data
Technical description of the burner Technical data Model RX 180 S/PV RX 250 S/PV Type 908T4 903T4 Output Delivery min - max 30 ÷ 180 36 ÷ 180 42 ÷ 250 50 ÷ 250 min - max Mcal/h 26 ÷ 155 31 ÷... -
Page 11: Maximum Dimensions
Technical description of the burner Maximum dimensions The maximum dimensions of the burner and flange are shown in Fig. 1. 20160386 Fig. 1 RX 180-250 S/PV Tab. D Fig. 2 RX 180-250 S/PV 1218 Tab. E 20160576... -
Page 12: Burner Description
Technical description of the burner Burner description 20160380 Fig. 3 Combustion head Ignition electrode Burner lockout may occur. control box lockout: Flame sensor probe if the control box 13)(Fig. 3) push-button lights up, it indicates Gas valve that the burner is in lockout.to reset, press the push-button. Air/gas mixer in the suction line circuit Gas pressure test point Gas valve conduit - Venturi... -
Page 13: Firing Rates (Version Tc)
Technical description of the burner Firing rates (version TC) The MAXIMUM OUTPUT must not be greater than the maximum The IGNITION OUTPUT must be selected within: limit of the diagram. – area A for gas G20 - G25; – area B for gas G30 - G31. RX 180 S/PV = 180 KW G20 - G25 - G31 The firing rate (Fig. -
Page 14: Delivered Output (Version Tc)
Technical description of the burner 4.11 Delivered output (version TC) The diagrams opposite allow you to set the power output either Going vertically up the diagram, to intersect the dotted line, you using the number of fan revs or using the pressure downstream can estimate the value of the number of revs on the left hand y- of the gas valve (point 1). -
Page 15: Adjustment Pilot
Technical description of the burner 4.12 Adjustment pilot The diagrams allow to choose the optimal gas pressure at the pi- P i l o t lot according to the revolutions at the ignition (PO) and the CO pressure test point to which you want to calibrate it. - Page 16 Technical description of the burner RX 250/PV G20 20160394 No. of motor turns/min. RX 250/PV GPL No. of motor turns/min. RX 250/PV G25 No. of motor turns/min. Fig. 8 20160576...
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Page 17: Burner Controls (Lme71
The LME71... are safety devices! Avoid opening WARNING or modifying it, or forcing its operation. Riello S.p.A. cannot assume any responsibility for damage resulting from unauthorised interven- tions! Also the safety notes contained in other chapters of this document must be respected! The installation and operation of the machine should be carried out only by qualified personnel. - Page 18 Technical description of the burner Installation notes Description of displays and buttons Arrange the high voltage ignition cables separately, as far as possible from the control box and the other cables. Do not confuse the powered conductors with the neutral ones.
- Page 19 Technical description of the burner Technical data Burner controls Mains voltage AC 230 V Mains frequency 50 / 60 Hz +- 6% LME71... Power absorption <10 W, normally Primary external fuse Max. 6.3 A (slow) Safety class I, with components in compliance with II and III, ac- cording to DIN EN 60730-1 “Input”...
- Page 20 Technical description of the burner Program sequence Standby Startup Operation Shutdown t11 t10 t12 t3 t3n t11 t8 Phase number oP: xx (actual load in %) Operating unit parameter number LED permanent LED flashing Relay Function/inputs contact X3-04 Pin 5 X3-04 Pin 1 X5-03 Pin 1 LR-OPEN...
- Page 21 Technical description of the burner Key Fig. 12 Times Alarm device Safety time Waiting time Auxiliary output Pre-purge time Lead connection Pre-ignition time Post-ignition time (P257 +0.3 seconds) Reset button (info button) (EK1) Ignition time pilot valve ON - fuel valve OFF /reset 6÷12s pilot valve ON - fuel valve ON...
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Page 22: 4.13.1 Indication Of The Diagnostic Mode
Technical description of the burner Phases key (Fig. 12 on page 18): 4.13.1 Indication of the diagnostic mode Phase The reset button (info button) is the key element Function number for resetting the burner control and activating/de- activating the diagnostic functions. Switching off phase lockout Standby, awaiting heat request The multi-colour indicator lamp is the key indica-... -
Page 23: Installation
In the event of doubt, do not use the burner; contact the supplier. CAUTION ..RIELLO S.p.A. I-37045 Legnago(VR) The packaging elements (wooden cage or card- 20157194 board box, nails, clips, plastic bags, etc.) must not Fig. -
Page 24: Operating Position
Installation Operating position The burner is designed to operate only in Any other position could compromise the cor- positions 1, 2, 4 and 5 (Fig. 14). rect operation of the appliance. Installation 1 is preferable, as it is the only ... -
Page 25: Fixing Of The Combustion Head, Electrodes Assembly And The Gas Valve (Version Tc)
Installation Fixing of the combustion head, electrodes assembly and the gas valve (version TC) ELEC TR O D ES Provide an adequate lifting system. Respect the dimensions shown in Fig. 18. WARNING 20084006 The burner is supplied with combustion head and PR O BE electrodes assembled. -
Page 26: Securing The Burner To The Boiler
Installation Securing the burner to the boiler All the installation, maintenance and disassembly operations must be carried out with the electricity supply disconnected. DANGER Provide an adequate lifting system. The seal between burner and boiler must be air- tight. WARNING In order to fix the burner to the boiler, proceed as follows: ... -
Page 27: Fuel Supply
Installation Fuel supply 5.8.1 Air/gas mixer Explosion danger due to fuel leaks in the pres- Gas and combustive air are mixed inside the purging circuit (mix- ence of a flammable source. er), starting from the intake inlet. Precautions: avoid knocking, attrition, sparks and Through the gas train, fuel is introduced into the intake air current heat. -
Page 28: Gas Train
Installation 5.8.2 Gas train This has been type-approved together with the burner, in accord- Make sure that the gas train is properly installed ance with regulation EN 676, and is supplied as standard. by checking for any fuel leaks. Disconnect the electrical power using the main The operator must use the required equipment switch. -
Page 29: Electrical Wiring
Installation 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. -
Page 30: Opening Sequence Of The Fuse-Holder
Installation 5.9.2 Opening sequence of the fuse-holder In the event of a fault or control of the fuse-holder, proceed as fol- Close the component side (Fig. 27). lows to remove or change the fuse: Turn off the burner's power supply using the main system switch. -
Page 31: Calibration And Operation
Calibration and operation Calibration and operation Operator panel with LCD AZL 21... display for control box LME 71... with PME 71.901... Description of the symbols Lock-out lamp Lockout Flame presence Valve powered Ignition transformer powered Fan motor powered Pre-heater active only for fuel oil burners Fig. -
Page 32: Operator Panel With Lcd Display
Calibration and operation Technical data Operation and display unit Unit general information Operating voltage DC 5V Power absorption <50 mW (normally) Protection level - AZL21… IP40 according to IEC529 Safety class II according to DIN EN 60730-1 Housing - Material PC and PC / ABS - Colour RAL 7035 (light grey) -
Page 33: Visualisation And Programming Modes
Visualisation and programming modes The operator panel, and especially the display visualisation, has 4 working modes: Normal Mode Info Mode (InFo) Service Mode (Ser) Parameter Mode (PArA) The information for accessing and operating at the various levels is given below. -
Page 34: Displaying The Operating Position
6.3.2 Displaying the operating position 6.3.3 Fault messages, display errors and information Displaying errors (faults) with lockout h min s Fig. 33 h min s Displaying oP: P1 means the 1st stage. Fig. 36 The display after oP is specific to the unit. The display shows Loc. -
Page 35: Info Level
Calibration and operation From Normal mode, using the keys of the Operator Panel, it is possible to activate one of the three visualisation/programming modes: Info mode (InFo) Parameter mode Programming modes Display modes (Para) Service mode (Ser) Info mode Visualises the general system information. List of the parameters that can be visualised (in the sequence in which they are visualised) The list of the parameters that can be visualised is given in the... -
Page 36: Displaying The Info Values
Calibration and operation Displaying the Info values 6.5.1 Identification date 6.5.2 Identification number h min s h min s Fig. 42 Fig. 46 On the left, the parameter 102 is displayed: blinking. On the left, the parameter 103 is displayed: blinking. On the right, ._._ is displayed. -
Page 37: Burner Identification
Calibration and operation 6.5.3 Burner identification 6.5.4 Number of resettable start-ups Note: They can be cancelled for assistance (see Parameter list page)! min s Fig. 48 On the left, the parameter 113 is displayed: blinking. h min s On the right, ._._ is displayed Fig. -
Page 38: Total Number Of Start-Ups
Calibration and operation /reset /reset h min s h min s Fig. 61 Fig. 57 Press “i/reset” or to display the blinking parame- Press “i/reset” or to return to the display of the ter 164 again. parameters. On to next parameter On to next parameter Goes back to the previous Goes back to the previous... -
Page 39: Service Level
Calibration and operation /reset Fig. 67 min s Press “i/reset” to switch between the Service and Fig. 66 When this screen appears you return to the normal display and Parameter level. you can pass to the successive level mode. Service mode Visualises the log of errors and some technical information Parameter Parameter... -
Page 40: Displaying The Service Values
Calibration and operation 6.6.1 Displaying the Service values End of the Service level Error history See Parameter with index, with or without direct display/Example of parameter 701: Error history Note: They can be cancelled for assistance (see Parameter list page)! Mains voltage min s Fig. -
Page 41: Parameters Level
Calibration and operation Parameter mode (PArA) Displays the complete list of parameters and allows you to mod- To access this level, refer to “Access procedure with password”. ify/program it. Once the access procedure has been carried out, the display will The parameters level is subdivided into groups: show “PArA”... -
Page 42: Entering The Password
Calibration and operation 6.7.1 Entering the password The OEM password should be composed of 5 characters, the technical one 4 characters. h min s Fig. 85 > 1 s min s Press to select a number or a letter. Fig. 79 Press the combination of keys to display CodE. -
Page 43: Backup
Calibration and operation 6.7.2 Backup Fig. 95 Fig. 89 Press for the parameter bAC_UP. The parameter 000:blinks. Display: The parameter bAC_UP blinks. Display: Parameter 000: blinks, the display Int does not blink. /reset /reset Fig. 96 Fig. 90 Fig. 97 Fig. -
Page 44: Restore
Calibration and operation 6.7.3 Restore /reset Fig. 100 Fig. 105 The parameter 000: blinks. Display: Parameter 000: blinks, the display Int does not blink. Fig. 101 Press “i/reset” to start up the backup process. /reset The display shows run. Fig. 106 <3 s Fig. - Page 45 Calibration and operation /reset Fig. 111 Fig. 116 Press “i/reset” to activate the restore process. The display shows run. <3 s Fig. 112 Press “i/reset” to detect the restore process. Display: The value 0. Fig. 117 After about 3 seconds (depending on the duration of the program sequence), the display shows bAC End to indicate the end of the restore process.
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Page 46: Parameter Modes Of Operation
Calibration and operation Parameter modes of operation The parameters memorised in the LME7... burner control can be displayed and modified in the Parameters level. 6.8.1 Parameters without index, with direct display Example of parameter 225 (pre-purging time) on the Param- eters level min s Fig. -
Page 47: Parameters Without Index, Without Direct Display
Calibration and operation Alternative 2: 6.8.2 Parameters without index, without direct display Adopt the value! Example of parameter 224 (air pressure switch specified time) on the Parameters level /reset Fig. 127 min s Fig. 132 Press for the specified time for the air pressure signal. Display: Parameter 224: blinks, characters ._._ do not. - Page 48 Calibration and operation Alternative 2: Adopt the change! /reset h min s Fig. 136 Fig. 139 Press to set the specified time. Display: The specified time 53.361 blinks. Alternative 1: min s Delete the change! Fig. 140 Press “i/reset” to go back to the modification mode. Fig.
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Page 49: Parameters With Index, With Or Without Direct Display
Calibration and operation 6.8.3 Parameters with index, with or without direct display Example of parameter 701: Actual error at the Service level See chapter List of error codes! h min s Fig. 149 Press , to select the index. .00 = error code h min s .01 = start meter reading Fig. - Page 50 Calibration and operation h min s h min s Fig. 155 Fig. 161 Press to return to the index. The parameters cover the period up to the first error recorded starting from the deletion of the history (max. to parameter 711.). Display: The parameter 701.
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Page 51: 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 Before igniting the burner, see the paragraph by qualified personnel, as indicated in this manual Safety test - with gas feeding closed on and in compliance with the standards and regula- page 54. -
Page 52: Burner Start-Up
Start-up, calibration and operation of the burner Burner start-up The burner can operate in two different modes: Manual operation (to be used for the initial start-up): in this i/reset mode the indicators of the display are blinking; Automatic operation (for normal work operation): in this mode the indicators of the display are fixed. -
Page 53: Checking The Modulating Operation (Automatic Operation)
Start-up, calibration and operation of the burner NOTE: At the first start-up, or else after replacing the pro- To go back to manual mode it is necessary to press the gram module, it is necessary to check, immediate- switch “ON/OFF” selector to “OFF” and repeat the first start- ly after the reset process, the sequence of the up sequence with the technician programming mode. -
Page 54: Combustion Head
Start-up, calibration and operation of the burner Combustion head The combustion head comprises a highly heat resistant cylinder This allows modulating ratios as high as 6:1, avoiding the danger whose surface features numerous holes, encased in a metal of flashback when modulating is at its minimum. “mesh”. -
Page 55: Switching Off The Burner
Start-up, calibration and operation of the burner Switching off the burner Press the switch “ON/OFF” switch to “OFF” (Fig. 163 on Press the switch “ON/OFF” switch to “OFF” posi- page 50). tion during the burner post-ventilation phase, the Disable the electrical supply. If the burner is off for long periods, equipment shuts down after a few seconds (ER- close the manual gas gates. -
Page 56: Maintenance
Maintenance Maintenance Notes on safety for the maintenance The periodic maintenance is essential for the good operation, safety, yield and duration of the burner. Turn off the burner's power supply using the main It allows you to reduce consumption and polluting emissions and system switch. -
Page 57: Safety Components
Maintenance Gas leaks Combustion Make sure that there are no gas leaks on the pipe between the In case the combustion values found at the beginning of the inter- gas meter and the burner. vention do not respect the standards in force or, in any case, do not correspond to a proper combustion, contact the Technical As- Gas filter sistance Service in order to carry out the necessary adjustments. -
Page 58: Recommended Preventive Maintenance Programme
Maintenance Recommended preventive maintenance programme The use and maintenance instructions are meant for general ap- plications. For specific use and maintenance instructions, contact the manufacturer of the control box. Test/Inspection Frequency Checking components, monitor and indicators DAILY Checking adjustments of instruments and control boxes DAILY Checking burner flame DAILY... -
Page 59: Operation, Indications, Diagnostic
Operation, indications, diagnostic Operation, indications, diagnostic Control sequence in the event of a fault In the event of a lockout, the outlets for fuel valves, burner motor and ignition devices should be immediately deactivated (<1 sec- ond). Causes Answer Mains voltage interruption Restart Voltage below the undervoltage threshold Safety switch off... -
Page 60: List Of Error Codes With Operation Using Azl21 Display
Operation, indications, diagnostic List of error codes with operation using AZL21 Display ... Error Clear text Possible cause code bAC Er3 Programme module compatibility fault with the base unit dur- The program sequence of the program module is not com- ing the back-up process patible with the base unit Err PrC... -
Page 61: Resetting Of Burner Control
Operation, indications, diagnostic Resetting of burner control When a lockout occurs, the burner control can be immediately re- Press the reset button again (info button) for at least 3 seconds leased by pressing the “RESET” button (See Fig. 163 on to activate the diagnostics interface. -
Page 62: Before Starting With A New Program Module Or When The Program Module Is Replaced
Operation, indications, diagnostic 9.3.2 Before starting with a new program module or when the program module is replaced The display shows rSt and PrC alternately. The display shows the replacement of the program module. Alternatively The indicator light blinks alternately one red and two yellow. Press for >3 to start the download of the program module data. -
Page 63: Manual Reset
Operation, indications, diagnostic Manual reset Press contemporaneously for >1 second (Escape) to start the manual reset process. The parameter PrC appears. Display: PrC > 1s Press for the parameter rSt. Display: rSt 1..3 s run appears during the download (restore process) of the program sequence. At the end of the reset process, the unit is automatically in a lockout position (LOC 138) and Alternatively need to be released in order to work! -
Page 64: Error During The Reset Process
Operation, indications, diagnostic 9.4.1 Error during the reset process Alternatively with The display shows rSt and Er1, Er2 or Er3. For the meaning of the possible cause, see the chapter List of error codes with operation using AZL21 Display ... on page 58 Tab. -
Page 65: List Of Parameters Pme71.901
List of parameters PME71.901... List of parameters PME71.901... The following pages have the Menus and the list of parameters The values shown in the “Factory setting” column, in the table be- for setting up the LCD AZL 2... Display for the LME 71... control low, are only given as a guide (Control box not programmed). - Page 66 List of parameters PME71.901... Parameter Values interval Password Password Factory reading Modification Resolution writing level setting level to Description Min. Max. to level level Speed without PWM fan flame: Speed of impu- 503.01 Modification 800 rpm 9000 rpm 10 rpm 5700 rpm rity purge 516.00...
- Page 67 List of parameters PME71.901... Parameter Values interval Password Password Factory reading Modification Resolution writing level setting level to Description Min. Max. to level level 9000 rpm Speed interval for constant time PT1: Upper 680.00 Modification 800 rpm 10 rpm 4000 rpm speed interval threshold Speed interval for constant time PT1: Lower 680.01...
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Page 68: A Appendix - Accessories
Appendix - Accessories Output power regulator kit for modulating operation With the modulating operation, the burner continually adapts the power to the heat request, ensuring a high level of stability for the parameter controlled: temperature or pressure. Two components should be ordered: –... -
Page 69: B Appendix - Electrical Panel Layout
Appendix - Electrical panel layout Index of layouts Indication of references Operational layout Operational layout Operational layout Operational layout Electrical wiring set by installer RWF50... operational layout Indication of references / 1 . A 1 Sheet no. Co-ordinates 20160576... - Page 70 20160576...
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- Page 75 20160576...
- Page 76 Wiring layout key Components on burner Components on boiler Control box LME7... Display and operating unit Suppressor Input under current 4...20 mA DC Pressure probe Pressure probe Probe Pt100 with 2 wires Probe Pt100 with 3 wires Probe Pt100 with 3 wires Probe with voltage output Internal output power regulator RWF50.2 Ionisation probe connector...
- Page 80 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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