Riello Vokera Compact A Series User, Installation And Servicing Instructions
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Riello Vokera Compact A Series User, Installation And Servicing Instructions

High efficiency combi boiler
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Compact A
High efficiency combi boiler
Users Instructions
Installation &
Servicing
Instructions
Compact 25 A G.C. N° 47-364-44
Compact 29 A G.C. N° 47-364-19
Compact 32 A G.C. N° 47-364-51
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 Compact A High efficiency combi boiler Users Instructions Installation & Servicing Instructions Compact 25 A G.C. N° 47-364-44 Compact 29 A G.C. N° 47-364-19 Compact 32 A G.C. N° 47-364-51 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 SECTION 4 - INSTALLATION ............14 ..............14 DELIVERY 1. THINGS YOU SHOULD KNOW ........... 1 CONTENTS ................14 GAS APPLIANCES ..............1 UNPACKING ................ 14 ELECTRICAL SUPPLY ............1 PREPARATION FOR MOUNTING THE APPLIANCE ..14 GUARANTEE REGISTRATION CARD ........1 FITTING THE FLUE .............

  • Page 3: Users Instructions

    USERS INSTRUCTIONS INTRODUCTION Dear Customer Your Vokèra Compact A boiler has been designed to meet and exceed the very latest standards in gas central heating technol- ogy, 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 HOT WATER SELECTOR SWITCH TEMPERATURE HEATING SELECTOR DISPLAY TEMPERATURE PRESSURE GAUGE SELECTOR HOT WATER TEMPERATURE SELECTOR Move the selector clockwise to increase the hot water outlet temperature, or counter-clockwise to reduce the temperature PRESSURE GAUGE Ensure the system pressure is set correctly (minimum 0.5-bar) MODE SELECTOR SWITCH/HEATING TEMPERATURE SELECTOR Mode selector switch: Hot water only - Select this position if you want the boiler to supply hot...

  • Page 5: Getting Started

    DIGITAL DISPLAY Fig. 2 Symbol/Icon Description Displayed when heating mode is active Displayed when hot water mode is active Displayed when frost protection function is active Displayed when hot-water pre-heat function is enabled. Flashes when functioning Displayed if an alarm or fault has been detected Displayed when low system pressure has been detected Displayed when an external sensor is connected...

  • Page 6: How To

    3. HOW TO... 3.1 HOW TO TOP-UP THE SYSTEM PRESSURE 3.3 HOW TO RESET THE APPLIANCE (fig. 1-2) When the fault code is displayed, the appliance will require to be reset manually. Before resetting the boiler, check what action The system pressure must be checked periodically to ensure the is required to be taken, using the information on the fault code correct operation of the boiler.

  • Page 7: What If

    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, internal fault, fumes exhaust - air intake Final Reset, check appliance operation obstruction Limit thermostat fault Final Reset, check appliance operation Fan tacho signal fault...
  • Page 8 INSTALLATION AND SERVICING INSTRUCTIONS INTRODUCTION All installers are asked to follow the Benchmark Scheme by Compact A boiler complies with basic requirements of the adhering to the Code of Practise, which can be obtained from following Regulation (EU) 2016/426; Yield directive: Article www.centralheating.co.uk.

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

    SECTION 1 - DESIGN PRINCIPLES AND OPERATING SEQUENCE 1.1 PRINCIPLE COMPONENTS 1.5 SAFETY DEVICES • A fully integrated electronic control board featuring electronic When the appliance is in use, safe operation is ensured by: temperature control, anti-cycle control, pump over-run, self- •...

  • Page 10: Section 2 - Technical Data

    SECTION 2 - TECHNICAL DATA 2.1 Central Heating Compact 25A Compact 29A Compact 32A Heat input (kW) 20.00 25.00 25.00 Maximum heat output (kW) 60/80°C 19.50 24.45 24.45 Minimum heat output (kW) 60/80°C 4.91 5.90 5.90 Maximum heat output (kW) 30/50°C 20.84 26.23 26.23...
  • Page 11 Parameter Symbol Compact Compact Compact Unit 25 A DIN 29 A DIN 32 A DIN Seasonal space heating energy efficiency class Water heating energy efficiency class Rated heat output Pnominal Seasonal space heating energy efficiency ηs Useful heat output At rated heat output and high-temperature regime (*) 19,5 24,5 24,5...

  • Page 12: Pump Duty

    2.13 PUMP DUTY Fig. 6 shows the flow-rate available – after allowing for pressure loss through the ap- pliance – for system requirements. When using this graph, apply only the pressure loss of the system. The graph is based on a 20 C temperature differential.

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

    SECTION 3 - GENERAL REQUIREMENTS (UK) This appliance must be installed by a competent person in ac- If installed less than 2m above a pavement or platform to cordance with the Gas Safety (Installation & Use) Regulations. which people have access (including balconies or flat roofs) the terminal must be protected by a guard of durable material.

  • Page 14: Electrical Supply

    3.11 SHOWERS 3.6.8 FREQUENT FILLING Frequent filling or venting of the system may be indicative If the appliance is intended for use with a shower, the shower of a leak. Care should be taken during the installation of the must be thermostatically controlled and be suitable for use with appliance to ensure all aspects of the system are capable of a combination boiler.

  • Page 15: Flue System

    3A.4 FLUE SYSTEM 3A.7 ELECTRICAL SUPPLY The terminal should be located where the dispersal of combustion The appliance is supplied for operation on 230V @ 50Hz products is not impeded and with due regard for the damage electrical supply; it must be protected with a 3-amp fuse. The and discoloration that may occur to building products located method of connection to the mains electricity supply must allow nearby.

  • Page 16: Section 4 - Installation

    SECTION 4 - INSTALLATION 4.1 DELIVERY 4.5.1 CONCENTRIC HORIZONTAL FLUE These instructions relate specifically to the installation of this Due to the weight of the appliance it may be necessary for appliance with the Vokera 60/100mm ‘X-type’ (click-fit) flue two people to lift and attach the appliance to its mounting. The terminals and accessories.
  • Page 17 NOTE: The appliance incorporates a ‘click-fit’ flue connection the flue system. Connect the required number of flue extensions (see fig. 12). Ensure that both screws ‘C’ (fig. 12) on the ‘click- or bends (up to the maximum equivalent flue length) to the flue fit’...
  • Page 18 When removing the rear outlet cap; retain the 4-screws as NOTE: The appliance incorporates a ‘click-fit’ flue connection these are required to attach the rear-flue terminal to the (see fig. 19). Ensure that both screws ‘C’ (fig. 12) on the ‘click-fit’ have been slackened off.

  • Page 19: Connecting The Gas And Water

    IMPORTANT NOTE The vertical flue terminal is 1.0 metre in length and cannot be Depending on system requirements, it may necessary to in- cut; therefore it may be necessary to adjust the height of the crease the size of the flow & return pipe work after the service appliance to suit or use a suitable extension.

  • Page 20: Section 5 - Commissioning

    4.7.1 CASING REMOVAL (fig. 25) To gain internal access to the appliance you must first remove the casing, proceed as outlined below: • locate and unscrew the 2-screws (A) that secure the outer casing to the appliance • lift the casing upward to disengage it from the top locating hooks and then remove •...

  • Page 21: Final Flushing Of The Heating System

    5.12 FINAL CHECKS Additionally, if the gas valve has been adjusted, replaced, or the appliance has been converted for use with another gas type, • ENSURE ALL TEST NIPPLES ON THE APPLIANCE GAS then it becomes necessary to carry out a combustion analysis VALVE ARE TIGHT AND CHECKED FOR TIGHTNESS.

  • Page 22: Section 6 - Servicing Instructions

    SECTION 6 - SERVICING INSTRUCTIONS 6.1 GENERAL 6.4.1 AIR BOX FRONT COVER REMOVAL (fig. 28) Locate the 4 screws and remove air box front cover. Once the appliance has been serviced, the benchmark Service Record must be completed. For UK only: It is important that the Benchmark Service Record is correctly completed and handed to the user.

  • Page 23: Lower Automatic Air Release Valve

    6.8 LOWER AUTOMATIC AIR RELEASE VALVE Please note, the sealing washers (Q) must be discarded and replaced with new sealing washers. (fig. 29) Unscrew gas pipe connections (S-T), the gas valve can now Carry out component removal procedure as described in 6.4. be removed.

  • Page 24: Main Heat Exchanger

    6.18 AUTOMATIC BY-PASS & DHW NON-RETURN VALVE (fig. 38) Carry out component removal procedure as described in 6.4. Remove the locking pin (Q1) that secures the cover (R1) to the hydraulic manifold. Using a hooked piece of wire, carefully withdraw the by-pass cartridge (S1) and/or DHW non-return cartridge (T1).

  • Page 25: Flue Collector Removal

    6.21 FLUE COLLECTOR REMOVAL (fig. 41) Ensure all seals are in good condition, taking care to ensure they are replaced correctly. 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).

  • Page 26: Section 7 - Checks, Adjustments And Fault Finding

    SECTION 7 - CHECKS, ADJUSTMENTS AND FAULT FINDING 7.1 CHECKING APPLIANCE OPERATION The built-in anti-cycle device prevents the burner from re- lighting for approximately 3-minutes. When the temperature When carrying out any repairs or servicing to the appliance, of the flow sensor falls below the set point (- hysterisis), the the relevant commissioning procedure must be undertaken to burner will re-light.

  • Page 27: Combustion Analysis Test

    7.3.1 CO FUNCTION SETTINGS Locate the CO button (see 7.3). Select the main selector switch in position FUNCTIONS ACTION ON THE BUTTON LED STATUS combustion analysis mode press once = burner running at maximum heating gas valve maximun setting press twice = burner running at maximum DHW gas valve minimum setting press three time = burner running at minimum NOTE...

  • Page 28: Fault Finding

    7.7.3 POLARITY CHECK Maximum differential (°C) With the appliance connected to the electrical supply and us- IGNITION CONTROL VALUE ing a suitable multimeter, carry out the following voltage tests: Ignition attempts before L/O (lockout) • connect test leads between the Live & Neutral connections at the appliance terminal strip.
  • Page 29 The “combustion analysis” function remains active for a limited time (15 min); if a delivery temperature of 90°C is reached, the REFERENCE burner is switched off. It will be switched back on when this TEMPERATURE 15 °C REFERENCE temperature drops below 78°C. TEMPERATURE 20 °C - Insert the analyser probe in the ports provided in the air distri- bution box, after removing the screws from the cover.
  • 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) Fig. 47 JP7 REMOVED JP7 INSERTED CN12 CN12 CN13 CN13 CN14 CN14...

  • Page 31: Section 8 - Wiring Diagrams

    SECTION 8 - WIRING DIAGRAMS 8.1 EXTERNAL WIRING The appliance is supplied with a ‘plug & play’ connector that MECHANICAL CLOCK - enables a quick and easy connection to various Vokèra con- RADIO FREQUENCY RECEIVER trols (see Fig. 49 & 50). For advice on controls that are not featured in this booklet, please contact the Vokèra technical help-line.
  • Page 32 FUNCTIONAL DIAGRAM Fig. 51 NOTE: L-N-E connection is advisable...

  • Page 33: Section 9 - Lpg Instructions

    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 BS 6798...

  • Page 34: 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 35: 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 36 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 37 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 38 Vokèra Warranty Terms and Conditions Vokèra Ltd offer customers the comfort of a parts and labour warranty repair service subject to the following terms and conditions. Vokèra Ltd only obligation under the guarantee shall be to repair or replace the faulty appliance at Vokèra Ltd discretion.
  • Page 39 d. To de-scaling or other work required as a result of hard water scale deposits or from damage caused by aggressive water or sludge resulting from corrosion. Indications that such work may be required include a noisy boiler, cold spots on radiators, sludge in pipes and poor circulation of the central heating system. e.
  • 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 0344 391 0999 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...

This manual is also suitable for:

Vokera compact 25aVokera compact 29aVokera compact 32a

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