Riello Vokera Vision 20 S User Instructions
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Riello Vokera Vision 20 S User Instructions

High efficiency system boiler
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Vision S
High efficiency system boiler
Users Instructions
Installation &
Servicing
Instructions
Vision 20 S G.C. N° 41-094-79
Vision 25 S G.C. N° 41-094-80
Vision 25 S G.C. N° 41-094-86
THESE INSTRUCTIONS
TO BE RETAINED
BY USER
Vokèra is a licensed member of the Benchmark scheme
which aims to improve the standards of installation and
commissioning of domestic hot water systems in the UK.

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  • Page 1 Vision S High efficiency system boiler Users Instructions Installation & Servicing Instructions Vision 20 S G.C. N° 41-094-79 Vision 25 S G.C. N° 41-094-80 Vision 25 S G.C. N° 41-094-86 THESE INSTRUCTIONS TO BE RETAINED BY USER Vokèra is a licensed member of the Benchmark scheme which aims to improve the standards of installation and commissioning of domestic hot water systems in the UK.

  • Page 2: Table Of Contents

    1. THINGS YOU SHOULD KNOW ........... 1 SECTION 5 - COMMISSIONING ........... 19 GAS APPLIANCES ..............1 GAS SUPPLY INSTALLATION ..........19 ELECTRICAL SUPPLY ............1 THE HEATING SYSTEM ............19 GUARANTEE REGISTRATION CARD ........1 INITIAL FILLING OF THE SYSTEM ........19 APPLIANCE COMMISSIONING CHECKLIST (UK only) ..

  • Page 3: Things You Should Know

    USERS INSTRUCTIONS INTRODUCTION Dear Customer Your Vokèra Vision boiler has been designed to meet and exceed the very latest standards in gas central heating technology, and if cared for, will give years of reliable use and efficiency. Please therefore take some time to read these instructions carefully. Do’s and Don’t’s - Do ensure that the system pressure is periodically checked - Do ensure that the boiler should not be used by children or unassisted disabled people...
  • Page 4 Fig. 1 MODE SELECTOR SWITCH HEATING TEMPERATURE SELECTOR DISPLAY PRESSURE GAUGE PRESSURE GAUGE Ensure the system pressure is set correctly (minimum 0.5-bar) MODE SELECTOR SWITCH/HEATING TEMPERATURE SELECTOR Mode selector switch: Heating & hot water - Select this position when you want the boiler to re- spond to a heating and hot water request from the time-clock programmer SARA function...

  • Page 5: Getting Started

    DIGITAL DISPLAY Symbol/Icon Description Displayed when heating mode is active Displayed when frost protection function is ac- tive Displayed if an alarm or fault has been detected Displayed when low system pressure has been detected Displayed when an external sensor is connected to the boiler Displayed if an ignition fault has been detected 2.

  • Page 6: How To

    3. HOW TO... 4. WHAT IF... 3.1 HOW TO TOP-UP THE SYSTEM PRESSURE 4.1 WHAT IF I SUSPECT A GAS LEAK (fig. 1-2) If you suspect a gas leak, turn off the gas supply at the gas meter and contact your installer or local gas supplier. If you The system pressure must be checked periodically to ensure the require further advice please contact your nearest Vokèra office.
  • Page 7 FAULT CODES ALARM CODE CAUSE ALARM TYPE ACTION AUTOSTOP Final Call engineer CALL FOR SERVICE Temporary then final Call engineer Ignition failure, flame not sensed, Final Reset, check appliance operation internal fault Limit thermostat fault Final Reset, check appliance operation Fan tacho signal fault Final Reset check appliance operation, check fan...
  • Page 8 INSTALLATION AND SERVICING INSTRUCTIONS INTRODUCTION All installers are asked to follow the Benchmark Scheme by responsible for the property in which the appliance is located/ adhering to the Code of Practise, which can be obtained from installed. A replacement copy can be obtained from Vokèra customer services.

  • Page 9: Section 1 - Design Principles And Operating Sequence

    SECTION 1 - DESIGN PRINCIPLES AND OPERATING SEQUENCE 1.1 PRINCIPLE COMPONENTS • A fully integrated electronic control board featuring electronic temperature control, anti-cycle control, pump over-run, self- diagnostic fault indicator, full air/gas modulation • Aluminium heat exchanger • Electronic ignition with flame supervision •...

  • Page 10: Section 2 - Technical Data

    SECTION 2 - TECHNICAL DATA 2.1 Central Heating Vision 20S Vision 25S Heat input (kW) 20.00 25.00 Maximum heat output (kW) 60/80°C 19.50 24.45 Minimum heat output (kW) 60/80°C 4.91 5.90 Maximum heat output (kW) 30/50°C 20.84 26.23 Minimum heat output (kW) 30/50°C 5.36 6.40 Minimum working pressure...
  • Page 11 Vision 20S Seasonal space heating energy efficiency class Water heating energy efficiency class Parameter Symbol Value Unit Parameter Symbol Value Unit Seasonal space heating Rated heat output Prated ηs energy efficiency For boiler space heaters and boiler combination For boiler space heaters and boiler combination heaters: useful heat output heaters: useful efficiency At rated heat output and high-...

  • Page 12: Pump Duty

    2.11 PUMP DUTY Fig. 6 shows the flow-rate available – after allowing for pressure loss through the appliance – for system requirements. When using this graph, apply only the pressure loss of the system. 1000 1100 Flow rate (l/h) Fig. 5 Fig.

  • Page 13: Section 3 - General Requirements (Uk)

    SECTION 3 - GENERAL REQUIREMENTS (UK) 3.5 AIR SUPPLY This appliance must be installed by a competent person in ac- cordance with the Gas Safety (Installation & Use) Regulations. The following notes are intended for general guidance only. This appliance is a room-sealed, fan-flued boiler, consequently 3.1 RELATED DOCUMENTS it does not require a permanent air vent for combustion air sup- ply.

  • Page 14: Electrical Supply

    3.7 ELECTRICAL SUPPLY The appliance is supplied for operation on 230V @ 50Hz electri- cal supply; it must be protected with a 3-amp fuse. The method control valve of connection to the mains electricity supply must allow for control complete isolation from the supply. The preferred method is by temporary valve connection...

  • Page 15: Air Supply

    3A.7 ELECTRICAL SUPPLY If installed less than 2m above a pavement or platform to which people have access (including balconies or flat roofs) The appliance is supplied for operation on 230V @ 50Hz electri- the terminal must be protected by a guard of durable material. cal supply;...

  • Page 16: Section 4 - Installation

    SECTION 4 - INSTALLATION 4.1 DELIVERY 29450126 1000mm extension 1000mm Due to the weight of the appliance it may be necessary for 29450127 2000m extension 2000mm two people to lift and attach the appliance to its mounting. The 29450128 Telescopic extension 372/519mm appliance is contained within a heavy-duty cardboard carton.
  • Page 17 4.5.1.2 FITTING THE REAR FLUE (fig. 14) (rear flue outlet only) Using the template provided, mark and drill a 125mm hole for the passage of the flue pipe. The hole should be drilled LEVEL to ensure any condense fluid that forms, is allowed to drain back to the appliance.
  • Page 18 4.5.2 CONCENTRIC VERTICAL FLUE IMPORTANT The vertical flue terminal is 1.0 metre in length and cannot be The appliance can be used with either the Vokèra condensing cut; therefore it may be necessary to adjust the height of the 60/100mm concentric flue system or the optional 80/125mm appliance to suit or use a suitable extension.
  • Page 19 INSTALLATION OF TWIN ADAPTOR KIT (fig. 18 & 19) • A 130mm hole is required for the passage of the concentric • Insert the exhaust connection manifold (A) onto the appliance terminal through the ceiling and/or roof. flue outlet. Depending on site conditions it may be preferable to install the •...

  • Page 20: Connecting The Gas And Water

    4.6 CONNECTING THE GAS AND WATER 4.7 ELECTRICAL CONNECTIONS The appliance is supplied with an accessory pack that includes The boiler is supplied with a 2-metre fly-lead. This lead can service valves. be used for connection to the electrical supply. Connect the The service valves are for welding.

  • Page 21: Section 5 - Commissioning

    SECTION 5 - COMMISSIONING 5.1 GAS SUPPLY INSTALLATION • ensure the 3 AMP fuse – supplied with the appliance – has been fitted; Inspect the entire installation including the gas meter, test for • ensure the system has been filled, vented and the pressure tightness and purge.

  • Page 22: Regulating The Central Heating System

    5.11 REGULATING THE CENTRAL HEATING 5.13 INSTRUCTING THE USER SYSTEM Hand over all documentation supplied with this appliance – including these instructions – and explain the importance of Fully open all radiator and circuit valves and run the appliance keeping them in a safe place. for both heating and hot water until heated water is circulating.

  • Page 23: Pump Assembly (Fig. 27)

    6.4.1 AIR BOX FRONT COVER REMOVAL (fig. 26) Locate the 4 screws and remove air box front cover. 6.5 PUMP ASSEMBLY (fig. 27) Carry out component removal procedure as described in 6.4. Disconnect and remove the pump outlet pipe (A) from the pump assembly/combustion chamber connection.

  • Page 24: Gas Valve (Fig. 32)

    6.12 GAS VALVE (fig. 32) Carry out component removal procedure as described in 6.4. The gas valve must be changed as complete unit. Disconnect the electrical plug and leads from the gas valve, slacken and unscrew gas valve inlet and outlet connections. Please note, the sealing washers (Q) must be discarded and replaced with new sealing washers.

  • Page 25: Main Heat Exchanger (Fig. 35)

    6.16 MAIN HEAT EXCHANGER (fig. 35) Carry out component removal procedure as described in 6.4. Remove the air chamber front cover. Locate and remove the gas pipe locking pin (A1) and swing/rotate the gas pipe away from the fan assembly (B1), (if necessary unscrew the gas pipe from the gas valve G1).

  • Page 26: Flue Collector Removal (Fig. 39)

    6.20 FLUE COLLECTOR REMOVAL (fig. 39) Carry out component removal procedure as described in 6.4. Remove the air chamber front cover. Remove the heat exchang- er as per 6.16. Locate and remove the screw (Y1) that secures the flue gas analysis test point cover (Z1). Disconnect the flues thermistor wiring connections.

  • Page 27: Checking The Co2 And Adjusting The Gas Valve

    7.3 CHECKING THE CO2 AND ADJUSTING THE GAS VALVE THE GAS VALVE MUST BE SET-UP OR ADJUSTED WITH THE AID OF A PROPERLY CALIBRATED FLUE GAS ANALYSER. Isolate the appliance from the electrical supply and remove the appliance casing as described in 4.7.1, to gain access to the printed circuit board, locate and open the closing plug on the dash board (L2), Restore the electrical supply to the boiler and switch the boiler to the OFF mode.

  • Page 28: External Faults

    7.6 EXTERNAL FAULTS 7.8 FAULT FINDING Before carrying out any faultfinding or component replacement, Before attempting any faultfinding, the electrical checks as ensure the fault is not attributable to any aspect of the installation. detailed in 7.7 must be carried out. Isolate the appliance from 7.6.1 INSTALLATION FAULTS the electrical supply.

  • Page 29: Adjustments

    7.10 ADJUSTMENTS - Check the CO value: (table 4) if the value does not match The boiler has already been adjusted by the manufacturer the value given in the table, use the gas valve maximum during production. If the adjustments need to be made again, adjustment screw for example after extraordinary maintenance, replacement of - Press the “combustion analysis”...
  • Page 30 7.10.1 CHECKING THE FAN SPEED REFERENCE REFERENCE TEMPERATURE 20 °C Locate the CO button (see Fig 40 pos SW1). TEMPERATURE 15 °C Select the main selector switch to the ON position, press the CO button once, the display will then scroll through the fan speeds along with the relevant icon.
  • Page 31 CLIMATIC CURVES CURVE DI TERMOREGOLAZIONE Temperatura esterna (˚C) EXTERNAL TEMPERATURE (°C) T80 Maximum set point for standard T range (JP7 removed) T45 Maximum set point for low T range (JP7 inserted) JP7 REMOVED JP7 INSERTED CN12 CN12 CN13 CN13 CN14 CN14 3.15A T 3.15A T...

  • Page 32: Section 8 - Wiring Diagrams

    SECTION 8 - WIRING DIAGRAMS 8.1 EXTERNAL WIRING External controls must to be added to the system and they must be connected to the appliance as shown in the following diagrams. For advice on controls that are not featured in this book, please contact Vokera technical on 0844 3910999 8.1.1 EXTERNAL WIRING LIMITATIONS Low voltage and High voltage cables must be run separately.
  • Page 33 FUNCTIONAL DIAGRAM Fig. 45...

  • Page 34: Section 9 - Lpg Instructions

    SECTION 9 - LPG INSTRUCTIONS 9.1 RELATED DOCUMENTS PARTS 1 & 2 FLUES & VENTILATION REQUIREMENTS BS 5440 BS 5449 PART 1 FORCED CIRCULATION OF HOT WATER SYSTEMS BS 5482 PART 1 DOMESTIC BUTANE & PROPANE GAS BURNERS IN PERMAMENT DWELLINGS BS 5546 INSTALLATION OF GAS HOT WATER SUPPLIES FOR DOMESTIC PURPOSES BS 6798...
  • Page 35 9.6.2 GAS VALVE MAXIMUM SETTING Set the CO button at maximum (see 9.6.1), once the maximum is obtained check that it corresponds with the appropriate CO value (Maximum) for the respective appliance. If the CO read- ing is correct, proceed to gas valve minimum setting (9.6.3). However, if the CO reading is incorrect, the maximum gas pressure must be adjusted as follows:...

  • Page 36: Commissioning Checklist

    COMMISSIONING: CO AND COMBUSTION RATIO CHECK BEFORE CO AND COMBUSTION RATIO CHECK NOTE The installation instructions should have been followed, gas type verified and gas supply pressure/rate checked as required The air/gas ratio valve is factory-set and must not be prior to commissioning.

  • Page 37: Benchmark

    Benchmark Commissioning and Servicing Section It is a requirement that the boiler is installed and commissioned to the manufacturers instructions and the data fields on the commissioning checklist completed in full. To instigate the boiler guarantee the boiler needs to be registered with the manufacturer within one month of the installation.
  • Page 38 GAS BOILER SYSTEM COMMISSIONING CHECKLIST This Commissioning Checklist is to be completed in full by the competent person who commissioned the boiler as a means of demonstrating compliance with the appropriate Building Regulations and then handed to the customer to keep for future reference. Failuretoinstallandcommissionaccordingtothemanufacturer’sinstructionsandcompletethisBenchmarkCommissioningChecklistwillinvalidatethe warranty.Thisdoesnotaffectthecustomer’sstatutoryrights.
  • Page 39 SERVICE RECORD It is recommended that your heating system is serviced regularly and that the appropriate Service Interval Record is completed. Service Provider BeforecompletingtheappropriateServiceRecordbelow,pleaseensureyouhavecarriedouttheserviceasdescribedinthemanufacturer’sinstructions. Alwaysusethemanufacturer’sspecifiedsparepartwhenreplacingcontrols. SERVICE 01 SERVICE 02 Date: Date: Engineername: Engineername: Companyname: Companyname: TelephoneNo: TelephoneNo: GassaferegisterNo: GassaferegisterNo: Atmax.rate: COppm AND CO ²...
  • Page 40 F 0344 391 0998 Vokèra Ireland West Court, Callan Co Kilkenny T 056 7755057 F 056 7755060 Vokèra Limited reserve the right to change specification without prior notice Consumers statutory rights are not affected. A Riello Group Company. Company Reg No: 1047779...

This manual is also suitable for:

Vokera vision 25 s41-094-7941-094-8041-094-86

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