VOKERA Compact A User Instructions
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VOKERA Compact A User Instructions

High efficiency combi boiler
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Compact A
High efficiency combi boiler
Users Instructions
Installation &
Servicing
Instructions
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 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 Things you should know Page Installation Page Gas appliances Delivery Electrical supply Contents Guarantee registration card Unpacking Appliance Log Book (UK only) Preparation for mounting the appliance How does it work? Fitting the flue Dimensions Connecting the gas & water Clearances required Electrical connections Frost protection system...

  • Page 3: Users Instructions

    USERS INSTRUCTIONS INTRODUCTION Dear Customer Your Vokèra Compact 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 you know how to isolate the appliance in an emergency...
  • Page 4 Fig. 1 YELLOW LED TEMPERATURE RED LED SELECTOR HYDROMETRE GREEN LED MODE SELECTOR SWITCH HEATING TEMPERATURE SELECTOR BOILER STATUS LED Green LED Boiler is working/responding to a heating/hot water request Red LED Boiler has identified a fault and has failed-safe. Refer to instructions on how to reset Yellow LED Service operation DHW TEMPERATURE SELECTOR Move the selector clockwise to increase the hot water outlet temperature, or counter-clockwise to reduce the temperature...

  • Page 5: Getting Started

    2. GETTING STARTED 2.3 LIGHTING THE BOILER 2.1 BEFORE SWITCHING ON Ensure the gas and electrical supply to the boiler are turned on. Before switching the appliance on, please familiarise yourself with: Turn the mode selector switch to the ON position. When there - how to isolate the appliance from the gas, water, and elec- is a request for heating or hot water via the time clock or tricity supplies;...

  • Page 6: What If

    APPLIANCE STATUS LED AND FAULT CODES Alarm type Led RED Led YELLOW Led GREEN Action Purge cycle mode active BLINKING BLINKING BLINKING Alarm high limit thermostat Final BLINKING Reset appliance. Call engineer if fault re-occurs Alarm system water pressure Final Check/refill system pressure, reset, check.

  • Page 7: Installation And Servicing Instructions

    INSTALLATION AND SERVICING INSTRUCTIONS INTRODUCTION also be used with the Vokèra twin flue system. The Compact comprises a range of high-efficiency The Compact is approved for use with C13 & C33 type flue combination boilers with outputs to DHW of 25kW and 30kW applications.

  • Page 8: Principle Components

    SECTION 1 - DESIGN PRINCIPLES AND OPERATING SEQUENCE 1.5 SAFETY DEVICES 1.1 PRINCIPLE COMPONENTS • A fully integrated electronic control board featuring electronic When the appliance is in use, safe operation is ensured by: • a water pressure switch that monitors system water pressure temperature control, anti-cycle control, pump over-run, self- and will de-activate the pump, fan, and burner should the diagnostic fault indicator, full air/gas modulation...

  • Page 9: Technical Data

    SECTION 2 - TECHNICAL DATA 2.1 Central Heating Compact 25 Compact 29 Heat input (kW) 20.00 Maximum heat output (kW) 60/80°C 19.50 24.40 Minimum working pressure 0.5 bar Maximum working pressure 2.7 bar Minimum flow rate 350 l/h 2.2 Domestic Hot Water Compact 25 Compact 29 Heat input (kW)

  • Page 10: 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 11: General Requirements (Uk)

    SECTION 3 - GENERAL REQUIREMENTS (UK) This appliance must be installed by a competent person in people have access (including balconies or flat roofs) the accordance with the Gas Safety (Installation & Use) terminal must be protected by a guard of durable material. Regulations.

  • Page 12: Electrical Supply

    with an approved non-return valve and stopcock for isolation 3.11 SHOWERS purposes. The feed pipe should be connected to the return If the appliance is intended for use with a shower, the shower pipe as close to the boiler as possible. must be thermostatically controlled and be suitable for use 3.6.8 FREQUENT FILLING with a combination boiler.

  • Page 13: Air Supply

    3A.7 ELECTRICAL SUPPLY terminal must be protected by a guard of durable material. The guard must be fitted centrally over the terminal. Refer to I.S. 813, The appliance is supplied for operation on 230V @ 50Hz when the terminal is 0.5 metres (or less) below plastic guttering electrical supply;...

  • Page 14: Contents

    SECTION 4 - INSTALLATION 29450126 1000mm extension 1000mm 4.1 DELIVERY 29450127 2000m extension 2000mm Due to the weight of the appliance it may be necessary for two 29450128 Telescopic extension 350/730mm people to lift and attach the appliance to its mounting. The Wall bracket pack (5) 208mm appliance is contained within a heavy-duty cardboard carton.
  • Page 15 4.5.2 CONCENTRIC VERTICAL FLUE The appliance can be used with either the Vokèra condensing 60/100mm concentric flue system or the optional 80/125mm concentric flue system. NOTE These instructions relate only to the Vokèra condensing 60/ 100mm concentric flue system. For specific details on the installation of the 80/125mm concentric flue system please refer to the instructions supplied.
  • Page 16 IMPORTANT Once the bracket has been secured to the wall, mount the The vertical flue terminal is 1.0 metre in length and cannot be appliance onto the bracket. cut; therefore it may be necessary to adjust the height of the appliance to suit or use a suitable extension.

  • Page 17: Connecting The Gas & Water

    pushed 50mm onto the male spigots of the concentric to twin converter. NOTE Seal the flue terminal assembly to the wall using cement or a suitable alternative that will provide satisfactory weatherproofing. The interior and exterior trim can now be fitted.

  • Page 18: Electrical Connections

    • store the casing and screws safely until required. Re-fit in the reverse order Hot water • gently lower the control fascia until it rests. outlet 4.7.2 APPLIANCE TERMINAL BLOCK The appliance terminal block is located on the rear of the cock Cold water inlet control fascia.

  • Page 19: Gas Supply Installation

    SECTION 5 - COMMISSIONING (see 7.8) particularly continuity, polarity and resistance to 5.1 GAS SUPPLY INSTALLATION earth; Inspect the entire installation including the gas meter, test for • ensure the 3 AMP fuse – supplied with the appliance – has tightness and purge.

  • Page 20: Regulating The Central Heating System

    5.12 FINAL CHECKS us using the envelope supplied • ENSURE ALL TEST NIPPLES ON THE APPLIANCE GAS • online at: vokera.co.uk VALVE ARE TIGHT AND CHECKED FOR TIGHTNESS. • for UK residents by calling: 0870 607 0281 • ENSURE THE APPLIANCE FLUE SYSTEM IS FITTED •...

  • Page 21: Pump Assembly

    6.5 PUMP ASSEMBLY (fig. 21) 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. Remove the expansion pipe locking pin (B) from the top of the pump assembly and withdraw the flexible pipe.

  • Page 22: Gas Valve

    6.12 GAS VALVE (fig. 26) 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 23: Main Heat Exchanger

    6.16 MAIN HEAT EXCHANGER (fig. 29) 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 24: Flue Collector Removal

    6.20 FLUE COLLECTOR REMOVAL (fig. 33) Carry out component removal procedure as described in 6.4. Remove 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 25: Checks, Adjustments And Fault Finding

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

  • Page 26: 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 yellow led blinking gas valve maximun setting press twice = burner running at maximum DHW yellow led blinking + red led fixed gas valve minimum setting...

  • Page 27: Fault Finding

    NOTE COMPONENT VALUES & Should it be found that the fuse has failed but no fault is CHARACTERISTICS indicated, a detailed continuity check will be required to trace the fault. A visual inspection of components may also assist in COMPONENT VALUE locating the fault.

  • Page 28: Wiring Diagrams

    SECTION 8 - WIRING DIAGRAMS 8.1 EXTERNAL WIRING MECHANICAL CLOCK - The appliance comes with a factory fitted (TA) link to allow RADIO FREQUENCY RECEIVER basic operation of the boiler via the mode selector switch. If external controls are to be added to the system, they must be connected to the appliance as shown in the following dia- grams.

  • Page 29: Functional Diagram

    FUNCTIONAL DIAGRAM Fig. 41 NOTE: L-N-E connection is advisable...

  • Page 30: Exploded Diagrams

    SECTION 9 - EXPLODED DIAGRAMS Table 1 POS. DESCRIPTION Frame assembly 20011411 20011411 Quick primer pressure gauge 20005580 20005580 Control panel cover 20026055 20026055 Printed circuit board 20025735 20025735 Led light guide 20013352 20013352 Instrumental panel 20026048 20026080 Knob 20013055 20013055 Case Assembly 20026073...

  • Page 31: Table 2

    Table 2 POS. DESCRIPTION Exchanger R8036 R8037 Connection R10030114 R10030114 Non return valve R10025056 R10025056 By-pass casing R10024641 R10024641 Heating by-pass valve 20007783 20007783 3-way heating manifold and cartridge 20021496 20021496 Cartridge 20017597 20017597 Actuator 20017594 20017594 Clip 20017598 20017598 Safety valve R10025055 R10025055...

  • Page 32: Table 3

    Table 3 POS. DESCRIPTION Expansion vessel 20024419 20024419 Pipe R10028603 R10028603 Pump R10027571 R10027571 Pipe 20025763 20025763 Exchanger assembly 20025765 20026081 Pipe 20025764 20025764 Pipe 20025744 20025744 Air vent valve 20019768 20019768 Siphon 20025733 20025733 Pipe 20025743 20025743 Degasser kit 20019888 20019888 Racord...

  • Page 33: Table 4

    Table 4 POS. DESCRIPTION 20002995 20002995 Burner assembly 20026061 20026079 Ignition electrode 20025737 20025737 Pipe 20025745 20025745 Gas valve 20025752 20025752 Gas pipe 20005553 20005553 3/4" gas cock R2266 R2266 Combustion chamber cover 20005594 20005594 Plug 20005550 20005550 Hole cover 20005586 20005586 Seal ignition electrode...

  • Page 34: Table 5

    Table 5 POS. DESCRIPTION Conveyor 20026060 20026060 Flue drain connection R10028421 R10028421 Outlet nut 20026049 20026049 Plug 20026058 20026058 Flue cllector 20026056 20026056 O ring R10023533 R10023533 Washer Ø 60 R10026345 R10026345 Washer Ø 60 R10028426 R10028426 Flue sensor 20007050 20007050 Washer 20026059...

  • Page 35: Related Documents

    SECTION 10 - LPG INSTRUCTIONS 10.1 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...
  • Page 36 10.6.2 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 reading is correct, proceed to gas valve minimum setting (10.7.2).
  • 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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