VOKERA MYNUTE 35HE Installation & Servicing Instructions Manual
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VOKERA MYNUTE 35HE Installation & Servicing Instructions Manual

VOKERA MYNUTE 35HE Installation & Servicing Instructions Manual

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See also: Instructions for Installation and Servicing
Installation
& Servicing
Instructions
0694
0694BQ0479
THESE INSTRUCTIONS
TO BE RETAINED
BY USER

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Summary of Contents for VOKERA MYNUTE 35HE

  • Page 1 Installation & Servicing Instructions 0694 0694BQ0479 THESE INSTRUCTIONS TO BE RETAINED BY USER...

  • Page 2: Table Of Contents

    Contents Servicing Page Design principles & operating sequence Page Principle components General Mode of operation (at rest) Routine annual servicing Replacement of components Mode of operation (Heating) Safety devices Component removal procedure Pump assembly Safety valve Technical data Page Bottom automatic air release valves Central heating Water pressure sensor/gauge Gas pressure...
  • Page 3 Vokera twin flue system. sel, safety valve, pressure gauge and automatic by-pass. The Mynute 35HE is approved for use with C12 & C32 type flue applications. The 35HE is produced as a room sealed, category II2H3P...

  • Page 4: Design Principles & Operating Sequence

    SECTION 1 DESIGN PRINCIPLES AND OPERATING SEQUENCE • fan speed sensor and pressure differential mecha- PRINCIPLE COMPONENTS • A fully integrated electronic control board featur- nism to ensure safe operation of the burner • a high limit thermostat that over-rides the tem- ing electronic temperature control, anti-cycle control, pump over-run, self-diagnostic fault in- perature control circuit to prevent or interrupt the...

  • Page 5: Technical Data

    SECTION 2 TECHNICAL DATA 2.1 Central Heating Mynute 35HE Heat input (kW) 34.60 Maximum heat output @ 60/80 °C (kW) 33.74 Maximum heat output @ 30/50 °C (kW) 36.75 Minimum heat output @ 60/80 °C (kW) 6.88 Minimum heat output @ 30/50 °C (kW) 7.55...

  • Page 6: Pump Duty

    2.11 PUMP DUTY Fig. 3 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. The graph is based on 20 °C temperature differential.

  • Page 7: Gas Supply

    or internal space containing a bath or shower. AIR SUPPLY When an appliance is installed in a room or internal The following notes are intended for general guid- space containing a bath or shower, the appliance ance only. This appliance is a room-sealed, fan- or any control pertaining to it must not be within flued boiler, consequently it does not require a reach of a person using the bath or shower.

  • Page 8: Electrical Supply

    Buildings’. valve connection 3.10 INHIBITORS Vokera recommend that an inhibitor - suitable for use with copper and aluminium heat exchangers - is used to protect the boiler and system from the effects of corrosion and/or electrolytic action. The flow/return double...

  • Page 9: Related Documents

    Fig. 6A Fig. 6B Safety valve outlet cock C/H flow valve C/H return valve SECTION 3A GENERAL REQUIREMENTS (EIRE) This appliance must be installed by a competent an adequate space for servicing and air circulation person in accordance with and defined by, the around the appliance.

  • Page 10: Flue System

    3A.6.2 AUTOMATIC BY-PASS 3A.10 INHIBITORS use new text here!!! The appliance has a built-in automatic by-pass, Vokera recommend that an inhibitor - suitable for consequently there is no requirement for an exter- use with copper and aluminium heat exchangers -...

  • Page 11: Installation

    FITTING THE FLUE The top flue outlet permits both horizontal and vertical flue applications to be considered, alterna- tively, the Vokera twin flue system can be utilised if longer flue runs are required. Outer clamp 4.5.1 CONCENTRIC HORIZONTAL FLUE (For concentric vertical flue, see 4.5.2).
  • Page 12 CONCENTRIC VERTICAL FLUE Seal the flue assembly to the wall using cement or a suitable alternative that will provide satisfactory The appliance can be used with either the Vokera weatherproofing. condensing 60/100mm concentric flue system or The exterior trim can now be fitted.
  • Page 13 4.5.3.1 INSTALLATION OF TWIN ADAPTOR KIT (fig. 10 4.5.3 TWIN FLUE SYSTEM & 11) The Vokera twin flue system enables greater flue • • • • • Insert the exhaust connection manifold (A) onto distances to be achieved (see 4.4.2) than that of the appliance flue outlet.
  • Page 14 • • • • • Remove the blanking plate (located to the right 4.5.3.2 HORIZONTAL TERMINATION (see fig. 12) of the appliance flue outlet) and - using the same The twin flue system must be converted to the screws - install the air inlet plate (B). dedicated concentric flue kit for termination.

  • Page 15: Connecting The Gas & Water

    • • • • • You must ensure that the entire flue system is Depending on site conditions it may be preferable to install the terminal assembly prior to fitting the properly supported and connected. • • • • • Ensure that any horizontal sections of pipe have twin flue pipes.

  • Page 16: Electrical Connections

    ELECTRICAL CONNECTIONS The electrical supply must be as specified in sec- link wire tion 3/3A. A qualified electrician should connect the electrical supply to the appliance. If controls - external to the appliance - are required, a compe- tent person must undertake the design of any external electrical circuits, please refer to section 8 for detailed instructions.

  • Page 17: Commissioning

    SECTION 5 COMMISSIONING GAS SUPPLY INSTALLATION INITIAL LIGHTING Inspect the entire installation including the gas Ensure the electrical supply to the appliance is meter, test for soundness and purge. Refer to BS switched on. Press the ON/OFF switch to switch 6891 for specific instruction.

  • Page 18: Setting The System Design Pressure

    SETTING THE SYSTEM DESIGN PRESSURE posting to us using the pre-paid envelope supplied The design pressure should be a minimum of 0.5 online at: vokera.co.uk ● BAR and a maximum of 1.5 BAR. for UK residents by calling: 0870 607 0281 ●...

  • Page 19: General

    It is the law that any servicing work is carried out by competent person such as a Vokera engineer, an approved service agent, British Gas, CORGI registered personnel or other suitably qualified personnel.

  • Page 20: Bottom Automatic Air Release Valves

    BOTTOM AUTOMATIC AIR RELEASE VALVES (fig. 21) Carry out component removal procedure as de- scribed in 6.4. Remove the expansion pipe locking pin (D) from the pump assembly and remove the expansion pipe. Locate and remove the AAV lock- ing pin (G) from the pump assembly and remove the AAV assembly (H).

  • Page 21: Flue Fan & Mixer

    connections on the heat exchanger. Locate and remove the 4-screws that secure the heat ex- changer to the combustion chamber (D). Move the heat exchanger to the right and disconnect it from the flue collector (E). The heat exchanger can now be lifted up and withdrawn from the appliance.

  • Page 22: Expansion Vessel

    to ensure they are replaced correctly. Replace in the reverse order ensuring the cartridge is facing the correct way. 6.18 EXPANSION VESSEL (fig. 1) Should the removal and replacement of the expan- sion vessel be deemed impractical, an external expansion vessel may be fitted to the return pipe as close to the appliance as possible.

  • Page 23: Checks, Adjustments And Fault Finding

    SECTION 7 CHECKS, ADJUSTMENTS AND FAULT FINDING CHECKING APPLIANCE OPERATION temperature drops below 4°C, the boiler will op- When carrying out any repairs or servicing to the erate on minimum power until the temperature of the primary thermistor reaches 30°C. There- appliance, the relevant commissioning procedure must be undertaken to ensure the continued safe after the pump &...

  • Page 24: Service Mode & Parameters

    Gas type and boiler output must be according to eters code by turning the RH (right-hand) encoder the boiler design specification. Vokera accepts no and confirm it by pushing MODE button. responsibility if the gas type and boiler output are set not according to the appliance specification.

  • Page 25: Combustion Analysis Test

    using a suitable screwdriver, very slowly turn the CHECKING THE EXPANSION VESSEL ● maximum adjustment screw (see fig. 38) - clock- Carry out the component removal procedure as wise to decrease, counter clockwise to increase described in 6.4. You must ensure that the boiler - until the correct value is displayed on the CO is completely drained of water.

  • Page 26: Fault Finding

    7.8.3 POLARITY CHECK NOTE Restore the electrical supply to the boiler and turn With the appliance connected to the electrical the selector switch to the on position. The boiler supply and using a suitable multimeter, carry out should now function as described in section 7.2. the following voltage tests: Should the boiler fail to respond, the internal fuses connect test leads between the Live &...
  • Page 27 FAULT CODES 1x Fault codes 1x appear when the burner has failed to ignite or the flame supervisione system has failed to detect a flame. Check incoming gas supply ● Check spark electrode ● Check polarity ● Check integrity of flue system ●...
  • Page 28 PLANT PARAMETER UNIT STEP DEF. INSTALLAT. SETTING Gas type 1 (Natural gas) 2 (LPG) Boiler output 34 (35 kW) 34-50 34 (35 kW) Building structure Min. 5 (light type 20 (heavy type (adjust only if external sensor is fitted) of construction) of construction) DOMESTIC HOT WATER PARAMETERS PARAMETER...

  • Page 29: Wiring Diagrams

    For advice on controls that are not featured in this book, please contact Vokera technical on 0870 333 0520. Fig. 39 TYPICAL CONTROL APPLICATIONS...
  • Page 30 8.4.1 “Y”-PLAN WITH EXTERNAL TWIN CHANNEL PROGRAMMER (fig. 40) Fig. 40 8.4.2 “S”-PLAN WITH EXTERNAL TWIN CHANNEL PROGRAMMER (fig. 41) Fig. 41...
  • Page 31 FUNCTIONAL DIAGRAM NOTE. L-N-E CONNECTION MUST NOT BE INTERCHANGED CONTROL SWITCHING OF TIME CLOCK AND ROOM THERMOSTAT RATED IS 230 V.a.c. Fig. 42 Fan transformer AE01A-P1 Master board AE01A-P2 Ausiliary board controll Pump M0T2B Motor control board Supplementary external pump AC0X Display board Fuse 4A F...

  • Page 32: Exploded Diagrams

    SECTION 9 EXPLODED DIAGRAMS POS. DESCRIPTION 35 HE Frame assembly 01005367 Cover assembly 10026239 Printed Circuit Board 10026240 Front cover assembly 10025842 Instrumental panel 10027949 Case 10026241 Driver PCB 10027200 Fuse 3478 Edge clip 5128 Wiring harness 10026341 Wiring harness 10027953 Wiring harness 10027360...
  • Page 33 POS. DESCRIPTION 35 HE By-pass casing 10024641 Heating by-pass valve 2047 Heating manifold and cartridge 10027768 3 way valve cartridge 10025305 Fixing fork wrench 10025450 Safety valve 10025055 Heating cock 1789 Connection 1790 By-pass casing cover 10024643 Discharge cock 10024646 Connections cover 10027685 Pipe...
  • Page 34 POS. DESCRIPTION 35 HE Expansion vessel 2573 Flexible pipe 10025188 Circulation pump 10027258 Pump cable 10026338 Pipe 10026264 Pipe 10027317 Pipe 10027318 Pipe 10027146 Air vent bottle 10026275 Siphon 10027190 Flexible pipe 10027191 Flexible pipe 10027192 Pipe 10027321 Flexible pipe 10026272 Pressure gauge 10027135...
  • Page 35 POS. DESCRIPTION 35 HE Air box bottom 10027175 Ambidx air box side 10026231 10027051 Burner assembly 10026548 Spark electrode 10027864 Detection electrode 10026316 Gas pipe 10026318 Gas valve 10027187 Gas cock 10020897 Air box cover 10026230 Glass assembly 10026328 Hole cap 10023805 Air/gas conveyor 10026309...
  • Page 36 POS. DESCRIPTION 35 HE Condensing exchanger assembly 01005369 Conveyor assembly 10026310 Flue drain connection 10026311 Fumes testing connection screw 10020625 Washer 10026323 Washer 10026366 Washer 10026345 Limit thermostat 10026982...

  • Page 37: Instructions

    PART 1 FLUES BS 5482 PART 1 DOMESTIC BUTANE & PROPANE GAS BURNERS IN PERMAMENT DWELLINGS 10.2 TECHNICAL DATA Gas Pressures Mynute 35HE Inlet pressure 37.0 mbar Maximum gas rate 2.69 kg/h Minimum gas rate 0.54 kg/h Injector size (quantity) 1 x Ø...
  • Page 38 reading is incorrect, the minimum gas pressure until the correct value is displayed on the CO must be adjusted as follows: analyser (allow time for the analyser to stabilise). using a suitable screwdriver, very slowly turn the ● using the procedure detailed in 9.6.1, check that ●...

  • Page 39: Service Interval Record

    SERVICE INTERVAL RECORD It is recommended that your heating system is serviced regularly and that you complete the appropriate Service Interval Record Below. Service Provider. Before completing the appropriate Service Interval Record below, please ensure you have carried out the service as described in the boiler manufacturer’s instructions.

  • Page 40: Benchmark

    Vokèra Ltd. Floor, Catherine House, Boundary Way, Hemel Hempstead, Herts, HP2 7RP Email: enquiries@vokera.co.uk Web: www.vokera.co.uk Sales, Technical Advice, General Enquiries - Tel: 0870 333 0520 Fax: 01442 281403 After Sales Service - Tel: 0870 333 0220 Vokèra Ireland...

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