VOKERA Vision S User Instructions
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VOKERA Vision S User Instructions

High efficiency system boiler
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Vision S
High efficiency system boiler
38
Users Instructions
Installation &
Servicing
Instructions
Vision 20 S G.C. N° 41-094-79
Vision 25 S G.C. N° 41-094-80
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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Summary of Contents for VOKERA Vision S

  • 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 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

    Users instructions Installation Page Things you should know Page Delivery Gas appliances Contents Electrical supply Unpacking Guarantee registration card Preparation for mounting the appliance Appliance Log Book (UK only) 4.5 Fitting the flue How does it work? Connecting the gas & water Dimensions Electrical connections Clearances required...

  • Page 3: Users Instructions

    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: Pressure Gauge

    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 Page

    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 The system pressure must be checked periodically to ensure the meter and contact your installer or local gas supplier.
  • 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

    INSTALLATION AND SERVICING INSTRUCTIONS INTRODUCTION or vertical applications. The Vision can also be used with the All installers are asked to follow the Benchmark Scheme by Vokèra twin flue system. adhering to the Code of Practise, which can be obtained from The Vision is approved for use with C13 &...

  • Page 9: Principle Components

    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: Central Heating

    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: Pump Duty

    Below an opening or window on a pitched roof 2000 mm From a vertical terminal to an adjacent opening (window, air-brick, etc.) (call Vokera technical for advice) From a vertical terminal to an adjacent vertical terminal 300 mm (only if both terminals are the same hight)

  • Page 12: Related Documents

    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 13: 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 14: Air Supply

    of connection to the mains electricity supply must allow for the terminal must be protected by a guard of durable material. complete isolation from the supply. The preferred method is by The guard must be fitted centrally over the terminal. Refer to using a double-pole switch fuse spur with a contact separation I.S.

  • Page 15: Delivery

    SECTION 4 - INSTALLATION 29450125 500mm extension 500mm 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 appliance is contained within a heavy-duty cardboard carton.
  • Page 16 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 17 IMPORTANT 4.5.2 CONCENTRIC VERTICAL FLUE 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 18 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 • Remove the blanking plate (located to the left of the appliance terminal assembly prior to fitting the twin flue pipes.

  • Page 19: Connecting The Gas & 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 be service valves. used for connection to the electrical supply. Connect the fly-lead The service valves are for welding.

  • Page 20: Gas Supply Installation

    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 21: Regulating The Central Heating System

    • by completing the warranty registration card and posting to • COMPLETE BENCHMARK CHECKLIST. us using the envelope supplied • online at: vokera.co.uk FOR UK ONLY • for UK residents by calling: 0870 607 0281 Complete details of the boiler, controls, installation and com- • for ROI residents by calling: 056 6655057.

  • Page 22: Pump Assembly

    appliance or removed component. Undertake a complete com- missioning check as detailed in section 5, after replacing any component. ALWAYS TEST FOR GAS TIGHTNESS IF ANY GAS CARRYING COMPONENTS HAVE BEEN REMOVED OR DISTURBED. 6.4.1 AIR BOX FRONT COVER REMOVAL (fig. 26) Locate the 4 screws and remove air box front cover.

  • Page 23: Gas Valve

    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 24: Main Heat Exchanger

    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 25: Flue Collector Removal

    6.20 FLUE COLLECTOR REMOVAL (fig. 39) Carry out component removal procedure as described in 6.4. Re- move the air chamber front cover. Remove the heat exchanger 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 26: Checking The Co

    Note: If a measured CO/CO2 ratio of 0.004/1 or less AND a on the CO2 analyser (allow time for the analyser to stabilise). CO reading of less than 350ppm cannot be achieved, please contact Vokera technical for advice. 7.3.4 COMPLETION On completion of the combustion analysis check and/or any gas valve adjustment, refit the plug (fig.

  • Page 27: External Faults

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

  • Page 28: Adjustments

    7.10 ADJUSTMENTS The boiler has already been adjusted by the manufacturer adjustment screw during production. If the adjustments need to be made again, - Press the “combustion analysis” button a third time to reach for example after extraordinary maintenance, replacement of the number of rotations corresponding to the minimum out- the gas valve, or conversion from methane gas to LPG, ob- put (table 2)
  • Page 29 Vision 20S The boiler is supplied with the adjustments shown in the table. Depending on plant engineering requirements or regional flue gas emission limits it is, however, possible to modify this value, referring to the graphs below. HTG curve (Qnheating) COs.a.
  • Page 30 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 31: External Wiring

    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 32: Functional Diagram

    FUNCTIONAL DIAGRAM Fig. 45...

  • Page 33: Related Documents

    SECTION 9 - LPG INSTRUCTIONS 9.1 RELATED DOCUMENTS BS 5440 PARTS 1 & 2 FLUES & VENTILATION REQUIREMENTS 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...
  • Page 34 9.6.2 GAS VALVE MAXIMUM SETTING Set the CO button at maximum (see 10.3.1), 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 (10.7.2). However, if the CO reading is incorrect, the maximum gas pressure must be adjusted as follows:...

  • Page 37: Benchmark

    As part of the installation process, ESPECIALLY WHERE A FLUE HAS BEEN FITTED BY PERSONS OTHER THAN THE BOILER contact with Vokera technical. If any such INSTALLER, visually check the integrity of the whole flue adjustment is recommended and further...
  • Page 40 Registered address: Vokèra Ltd Borderlake House Unit 7 Riverside Industrial Estate London Colney Herts AL2 1HG enquiries@vokera.co.uk www.vokera.co.uk www.vokera.ie Sales, General Enquires T 0844 391 0999 F 0844 391 0998 Vokèra Ireland West Court, Callan Co Kilkenny T 056 7755057 F 056 7755060 Vokèra Limited reserve the right to change...

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