VOKERA AquaNova Installation & Servicing Instructions Manual
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VOKERA AquaNova Installation & Servicing Instructions Manual

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AquaNova
Water heater
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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Sara lavender
February 7, 2025

What does it mean if green and red lights flashing and no hot water?

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1 comments:
Mr. Anderson
February 11, 2025

If the green light is flashing every 5 seconds, it indicates there is no demand for hot water. If the red light is flashing, refer to section 3.2 of the manual for troubleshooting. Ensure the gas and electrical supply are on, and check if the taps are fully open.

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Summary of Contents for VOKERA AquaNova

  • Page 1 AquaNova Water heater 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

    Contents Design principles & operating sequence Page Servicing Page Principle components General Mode of operation Routine annual servicing Safety devices Replacement of components Component removal procedure Technical data Page NTC thermistors removal Performance High limit thermostat removal Gas pressure Flow switch removal Dimensions Gas valve removal Clearances...
  • Page 3 360 degrees for various horizontal or vertical status/fault indicators. applications. It is produced as a room sealed, category II2H3+ appliance, The AquaNova can also be used with the Vokera twin flue suitable for wall mounting applications only. It is provided system. General layout...

  • Page 4: Principle Components

    SECTION 1 DESIGN PRINCIPLE AND OPERATING SEQUENCE When the appliance reaches the desired PRINCIPLE COMPONENTS temperature the burner will modulate to maintain A fully integrated electronic control board the desired temperature. Should the temperature featuring electronic temperature control, self- continue to increase, the burner will shut off when diagnostic fault indicator, continuous gas the maximum operating temperature is attained.

  • Page 5: Technical Data Page

    SECTION 2 TECHNICAL DATA 2.1 Performance Heat input 32,0 kW Heat output (max) 28,8 kW Heat output (min) 10,0 kW Minimum working pressure 0,15 kW Maximum working pressure 10,0 bar Minimum flow rate 2 litres per minute Hot water - 35°C temperature rise 11,8 litres per minute 2.2 Gas pressure Inlet pressure (G20)

  • Page 6: General Requirements Page

    SECTION 3 GENERAL REQUIREMENTS BS 5440 PART 1 FLUES BS 5440 PART 2 FLUES AND VENTILATION BS 5546 INSTALLATION OF HOT WATER SUPPLIES FOR DOMESTIC PURPOSES BS 6891 LOW PRESSURE INSTALLATION PIPES BS 6700 DESIGN, INSTALLATION, TESTING AND MAINTAINENCE OF SERVICES SUPPLYING WATER FOR DOMESTIC USE must be fitted in accordance with BS 6891.

  • Page 7: Electrical Supply

    Pipes should be insulated to avoid heat loss and in particular to avoid the possibility of freezing. Particular attention should be paid to pipes passing through ventilated areas such as under floors, loft space, and void areas. 3.6.2 DRAIN COCKS These must be located in accessible positions to facilitate draining of the appliance and all water pipes connected to the appliance.

  • Page 8: Fitting The Flue

    The top flue outlet permits both horizontal and vertical flue applications to be considered, Insert the flue assembly into the previously drilled alternatively, the Vokera twin flue system can be flue hole and locate the flue bend over the utilised if longer flue runs are required.
  • Page 9 If the horizontal flue kit (2359029) requires to be IMPORTANT cut to the correct size (dimension Y), you must The flue restrictor ring must be removed or ensure that the inner (60mm) pipe stands proud discarded if the total flue length - including bends- of the outer (100mm) pipe by 7,5 mm (see fig.
  • Page 10 1,0 metre 90° bend 4.5.3 TWIN FLUE SYSTEM The Vokera twin flue system enables greater flue 4.5.3.1 INSTALLATION OF CONCENTRIC TO TWIN distances to be achieved (see 4.4.2) than that of ADAPTOR KIT (see fig. 10) the standard concentric flue system.
  • Page 11 Mark and drill a 130mm hole for the passage of the horizontal flue terminal, ensuring that there is a 1° fall back to the water heater (17mm per 1000mm). Insert the terminal assembly into the flue hole. Push-fit the twin flue pipes onto the concentric to twin converter box ensuring that the exhaust pipe connects to the exhaust connection on the concentric to twin converter.

  • Page 12: Connecting The Gas & Water

    4.6.3 HOT WATER OUTLET (see fig. 4) The appliance is supplied with 15mm connector for the hot water outlet connection, connect a 15mm pipe to the outlet of the connector and tighten the nut. ELECTRICAL CONNECTIONS The electrical supply must be as specified in 3.7. The appliance is supplied, pre-wired with a 0,9 metre length of flex, connect the wires as follows: connect the Brown wire to the L (Live) terminal...

  • Page 13: Gas Supply Installation

    SECTION 5 COMMISSIONING GAS SUPPLY INSTALLATION TIGHTENED CHECKED SOUNDNESS. Inspect the entire installation including the gas meter, test for soundness and purge. Refer to BS ENSURE THE APPLIANCE FLUE SYSTEM IS 6891 for specific instruction. FITTED CORRECTLY AND IS PROPERLY SECURED.

  • Page 14: Servicing

    COMPONENTS HAVE BEEN REMOVED OR It is the law that any servicing work is carried out DISTURBED. by competent person such as a Vokera engineer, an approved service agent, British Gas, or other NTC THERMISTORS (see fig. 1) CORGI registered personnel.

  • Page 15: Gas Valve Removal

    6.7.1 PRINTED CIRCUIT BOARD (PCB) (see fig. 17) Disconnect the electrode lead from its connector. Disconnect the gas valve outlet pipe from its Carry out component removal procedure as de- connection to the burner. Slacken and remove scribed in 6.4. the lock-nut that secures the burner assembly to Remove the appliance casing as described in the air chamber base.

  • Page 16: Heat Exchanger Removal

    to flue elbow. Replace in the reverse order. Ensure all seals are in good condition, taking care to ensure they are replaced correctly. Fig. 19 Fig. 20 6.11 HEAT EXCHANGER (see fig. 20) 6.12 AIR PRESSURE SWITCH (see fig. 1) Carry out component removal procedure as Carry out component removal procedure as described in 6.4.

  • Page 17: External Faults

    NOTE Repeat above test on the Live & Earth connections at the appliance term. You should ensure that one or two hot water outlets are fully open during the above procedure. NOTE This will ensure that the output of the appliance Should it be found that the fuse has failed but no (burner pressure) is not compromised due to a fault is indicated, a detailed continuity.

  • Page 18: Fault Codes

    integrity and continuity. If the appliance still fails to respond, refer to the detailed fault-finding flowcharts overleaf. FAULT CODES Red LED Status Action required Green LED Switched off or at stand-by NONE On for 1 second, off for 5 seconds DHW request NONE Flame lockout...
  • Page 19 FAULT FINDING TEST ‘1’ START SWITCH ON WATER HEATER AND SELECT WATER TEMPERATURE AT MAX. MAINS TURN ON TAP WITH PRESENT BETWEEN A FLOW RATE > TERMINALS 8 & 9 THAN 2.5 LIT/MIN ON ACF MAINS ON FAN REPLACE FAN RUNNING MAINS PRESENT BETWEEN...
  • Page 20 FAULT FINDING TEST ‘2’ SPARK AT ELECTRODE MAINS PRESENT BETWEEN TERMINALS 6 & 11 ON ACF IGNITION THERE VOLTAGE AT SPARK ELECTRODE PIN? LOCKOUT ATTENTION !! AFTER IGNITION VOLTAGE > 10 kV MODULATION REPLACE A.C.F. TEST BOARD CHEK SENSING ELECTRODE AND LEAD CHECK SPARK ELECTRODE AND...
  • Page 21 FAULT FINDING TEST ‘3’ MODULATION TEST VOLTAGE ACROSS TERMINALS OF MODULATOR COIL > 10 Vdc THERE A WAIT TILL THE VOLTAGE VOLTAGE >10 Vdc BETWEEN TERMINALS BETWEEN TERMINALS X3.3 & X3.4 X3.3 & X3.4 ON PCB IS < 1.2 Vdc ON PCB IS THE WATER FLOW...
  • Page 22 FAULT FINDING TEST ‘4’ MAINS PRESENT BETWEEN TERMINALS 5 & 11 ON ACF MAINS REPLACE ACF PRESENT BETWEEN BOARD WHITE WIRE ON AIR FLOW SWITCH AND PIN 11 ON ACF CHECK &/OR MAINS REPLACE PRESENT BETWEEN WIRING AND RED WIRE ON AIR FLOW CONNECTIONS SWITCH AND PIN 11 ON ACF...

  • Page 23: Wiring Diagrams

    For further advice on the electrical connection, please contact Vokera technical on 0870 333 0520. FUNCTIONAL DIAGRAM NOTE: L-N connection is advisable...
  • Page 24 FUNCTIONAL DIAGRAM...

  • Page 25: Exploded Diagrams

    SECTION 9 EXPLODED DIAGRAMS Pos Description Code PCB cover 10021120 Cable 10020688 Control panel 10021127 Wall bracket W7060407 Led lens 10020676 Air chamber top 10021131 Selector/thermostat knob 10020674 Back panel W7050355 Adhesive logo 1471 Silicone tube 1457 Air chamber seal W140 Pressure differential switch 10020890...
  • Page 26 Pos Description Code Exhaust restrictor ring W7060504 60mm pipe W7050062 Gasket 5917 Clip 5916 Tav. 1 Negative venturi W7050163 Positive venturi W7050164 Fan to flue connector 6228 Fan to flue connector W7080191 Fan gasket W92A Flue hood W7040039 Flange W7040056 Heat exchanger 10021367 Washer...

  • Page 27: Instructions

    SECTION 10 L.P.G. INSTRUCTIONS For details of converting an appliance to LPG please refer to the instructions supplied with the relevant conversion kit. 10.1 TECHNICAL DATA Inlet pressure (LPG) 37 mbar Maximum burner pressure 36 mbar Minimum burner pressure 3,0 mbar Gas rate 1,33m Injector size...
  • Page 28 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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