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37

Users instructions

  Things you should know 

Page

 

1.1 

Gas appliances 

1

  1.2 

Electrical supply 

1

  1.3 

Guarantee registration card 

1

  1.4 

Appliance Log Book (UK only) 

1

  1.5 

How does it work? 

1

 1.6  Dimensions 

1

  1.7 

Clearances required 

1

  1.8 

Frost protection system 

1

  1.9 

Appliance status indicators 

1

  Getting started 

Page

 

2.1 

Before switching ON 

6

  2.2 

Appliance controls 

6

  2.3 

Lighting the boiler 

6

  2.4 

Adjusting the heating temperature 

6

  2.5 

Adjusting the hot water temperature 

6

  2.6 

Explanation of features 

6

  2.7 

Automatic temperature control 

6

 

How to... 

Page

 

3.1 

How to top-up the system pressure 

6

  3.2 

How to reset the appliance 

6

  3.3 

How to shut down the system for short periods 

6

  3.4 

How to shut down the system for long periods 

6

  3.5 

How to care for the appliance 

6

 

What if... 

Page

 

4.1 

What if I suspect a gas leak 

7

  4.2 

What if I have frequently top-up the system 

7

  4.3 

What if the appliance is due its annual service 

7

  4.4 

What if I need to call an engineer 

7

Installation and Servicing instructions

  Design principles & operating sequence 

Page 

  1.1 

Principle components 

9

  1.2   Mode of operation (at rest) 

   9

  1.3   Mode of operation (heating) 

9

  1.4 

Mode of operation (Hot water) 

9

  1.5   Safety devices 

9

 

Technical data 

Page

  2.1   Central heating 

10

  2.2 

Domestic hot water 

10

  2.3 

Gas pressures 

10

  2.4   Expansion vessel 

10

 2.5  Dimensions 

10

  2.6   Clearances 

10

 2.7  Connections 

10

  2.8   Electrical 

10

  2.9 

Flue details (concentric 60-100) 

10

  2.9A  Flue details (concentric 80-125) 

10

  2.9B  Flue details (twin pipes) 

10

  2.10  Efficiency 

11

 2.11  Emissions 

11

  2.12  Pump duty 

11

 

General requirements (UK) 

Page

 

  3.1   Related documents 

12

  3.2   Location of appliance 

12

  3.3   Gas supply 

12

  3.4   Flue system 

12

  3.5   Air supply 

12

  3.6   Water circulation 

12

  3.7   Electrical supply 

13

  3.8 

Mounting on a combustible surface 

13

  3.9   Timber framed buildings 

13

 3.10  Inhibitors 

13

 3.11  Showers 

13

 

General requirements (EIRE) 

Page

 

  3A.1   Related documents 

13

  3A.2   Location of appliance 

13

  3A.3   Gas supply 

13

  3A.4   Flue system 

13

  3A.5   Air supply 

14

  3A.6   Water circulation 

14

  3A.7   Electrical supply 

14

  3A.8  Mounting on a combustible surface 

14

  3A.9   Timber framed buildings 

14

  3A.10   Inhibitors 

14

  3A.11 Showers 

14

  3A.12 Declaration of conformity 

14

 

Installation Page

  4.1   Delivery 

15

  4.2   Contents 

15

  4.3   Unpacking 

15

  4.4   Preparation for mounting the appliance  

15

  4.5 

Fitting the flue 

15

  4.6   Connecting the gas & water 

19

  4.7 

Electrical connections 

19

 

  Commissioning 

   Page 

  5.1 

Gas supply installation 

20

  5.2   The heating system 

20

  5.3 

Initial filling of the system 

20

  5.4   Initial flushing of the system 

20

  5.5   Pre-operation checks  

20

  5.6   Initial lighting 

20

  5.7 

Checking gas pressure & combustion analysis 

20

  5.8   Final flushing of the heating system 

20

  5.9 

Setting the boiler operating temperature 

20

  5.10   Setting the system design pressure 

20

  5.11   Regulating the central heating system 

21

  5.12   Final checks 

21

  5.13   Instructing the user 

21

   

Servicing  

        Page

 6.1  General 

21

  6.2   Routine annual servicing 

21

  6.3 

Replacement of components 

21

  6.4 

Component removal procedure 

21

  6.5 

Pump assembly 

22

  6.6 

Safety valve 

22

  6.7 

Lower automatic air release valves 

22

  6.8   Water pressure switch 

22

  6.9   Flow thermistor 

22

  6.10  Return thermistor 

22

  6.11   Printed circuit board 

22

  6.12  Gas valve 

23

  6.13  Electrodes  

23

  6.14   Flue fan & mixer 

23

  6.15   Burner 

23

  6.16  Main heat exchanger 

24

  6.17  Automatic by-pass & DHW non-return valve 

24

  6.18   Expansion vessel removal 

24

  6.19   Condense trap removal 

24

  6.20  Flue collector removal 

25

 

  Checks, adjustments and fault finding  

Page

  7.1   Checking appliance operation 

26

  7.2   Appliance modes of operation 

26

  7.3   Checking the CO

2

 & adjusting the valve 

26

  7.4   Combustion analysis test 

27

  7.5   Checking the expansion vessel 

27

  7.6 

External faults  

27

  7.7   Electrical checks 

27

  7.8 

Fault finding 

28

  7.9 

Component values & characteristics 

28

 7.10  Adjustments 

29

 

 

Wiring diagrams 

Page

  8.1 

External wiring 

31

  8.2 

Other devices 

31

 

L.P.G. instructions 

Page

  10.1  Related documents  

33

  10.2   Technical data 

33

  10.3  Converting the appliance gas type 

33

  10.4  Gas supply 

33

  10.5  Gas supply installation 

33

  10.6  Checking the CO

2

 and adjusting the gas valve 

33

  

Benchmark

 35-36

Содержание Vision 25C

Страница 1: ...ctions THESE INSTRUCTIONS TO BE RETAINED BY USER Vok ra is a licensed member of the Benchmark scheme which aims to improve the standards of installation and commissioning of domestic hot water systems...

Страница 2: ...4 Flue system 13 3A 5 Air supply 14 3A 6 Water circulation 14 3A 7 Electrical supply 14 3A 8 Mounting on a combustible surface 14 3A 9 Timber framed buildings 14 3A 10 Inhibitors 14 3A 11 Showers 14...

Страница 3: ...atically Dear Customer Your Vok ra 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 e...

Страница 4: ...shows the temperature values Pressure gauge shows the current pressure of your heating system the gauge should be set between 1 and 1 5 BAR When the appliance is oper ating the gauge may rise or fall...

Страница 5: ...e ADVANCE ON fun ction is active Displayed when the ADVANCE OFF fun ction is active Displays current minutes past the hour Displays current hour of the day 24 hour clock in 30 minute segments lar ge s...

Страница 6: ...ay of week setting procedure NOTE the time of day is shown on the display and is also indicated on the 24 segmented display as a flashing segment 1 4 CHANGING THE HEATING PATTERN The built in clock is...

Страница 7: ...e programmed heating pattern AUTO ON Heating is in an ON period according to the programmed heating pattern MAN OFF Heating is being controlled manually and is switched constantly OFF MAN ON Heating i...

Страница 8: ...a period of at least two minutes before re setting the appliance 2 6 EXPLANATION OF FEATURES Although the Vok ra Vision has been designed for simplicity of use it utilises the latest in boiler techno...

Страница 9: ...1 Ignition failure flame not sensed internal fault Final Reset check appliance operation A02 Limit thermostat fault Final Reset check appliance operation A03 Fan tacho signal fault Final Reset check a...

Страница 10: ...on open vented systems This booklet is an integral part of the appliance It is therefore necessary to ensure that the booklet is handed to the person responsible for the property in which the applian...

Страница 11: ...the boiler will perform a three minute anti cycle timer delay When the request for heat has been satisfied the appliance pump and fan may continue to operate to dissipate any residual heat within the...

Страница 12: ...mum system volume 74 litres Pre charge pressure 1 bar 2 5 Dimensions Vision 25C Vision 30C Height mm 715 Width mm 405 Depth mm 248 Dry weight kg 27 28 2 6 Clearances Vision 25C Vision 30C Sides 12mm T...

Страница 13: ...to the roof flashing As determined by the fixed collar of the vertical terminal R To the side of a boundary 300 mm S To the side of an opening or window on a pitched roof 600 mm T Below an opening or...

Страница 14: ...n vessel to accom modate the increased volume of water when the system is heated It can accept up to 8 litres of expansion from within the system generally this is sufficient however if the system has...

Страница 15: ...ted on a wall of combustible mate rial there is no requirement for a sheet of fireproof material to protect the wall 3 9 TIMBER FRAMED BUILDINGS If the appliance is to be fitted in a timber framed bui...

Страница 16: ...An alternative method of filling the system would be from an independent make up vessel or tank mounted in a position at least 1 metre above the highest point in the system and at least 5 metres abov...

Страница 17: ...see2 9 Areductionmustalsobemadetothemaximumlength see table below when additional bends are used Reduction for additional bends Bend Reduction in maximum flue length for each bend 45 bend 1 3 metre 60...

Страница 18: ...REAR FLUE fig 15 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 form...

Страница 19: ...required number of flue extensions or bends up to the maximum equivalent flue length between the boiler and vertical flue assembly see fig 14 Ensure that any horizontal sections of the flue system hav...

Страница 20: ...flue kit for termination The horizontal terminal is supplied with a built in converter box and cannot be shortened A 130mm hole is required for the passage of the concentric terminal through the wall...

Страница 21: ...can be used for connection to the electrical supply Connect the fly lead to a fused plug or fused isolator in the following way brown wire to LIVE supply blue wire to NEUTRAL supply green yellow to E...

Страница 22: ...e the electrical supply to the appliance is switched on Ensure any external controls are switched to an ON position and are calling for heat Move the selector switch to the ON position the appliance w...

Страница 23: ...CORRECTLY AND IS PROPERLY SECURED ENSURE ALL PIPE WORK IS RE CHECKED FOR TIGHT NESS RE FIT APPLIANCE CASING COMPLETE BENCHMARK CHECKLIST FOR UK ONLY Complete details of the boiler controls installatio...

Страница 24: ...the reverse order 6 7 LOWER AUTOMATIC AIR RELEASE VALVE fig 28 Carry out component removal procedure as described in 6 4 Remove the expansion pipe locking pin B from the pump as sembly and remove the...

Страница 25: ...tion taking care to Fig 34 6 13 ELECTRODES fig 34 Carry out component removal procedure as described in 6 4 Remove the air chamber front cover Disconnect the electrode leads and ancillary wiring from...

Страница 26: ...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...

Страница 27: ...unscrew the inlet connection Unscrew the nut E2 Lift the DHW flow switch housing from its seating If necessary remove the locking pin F2 from the DHW flow switch taking care not to lose the float con...

Страница 28: ...5 C and 55 C respectively the boiler will fire on minimum 25 power until the primary thermistor exceeds 55 C Thereafter the pump will over run for a period of 30 seconds 7 2 3 HEATING MODE With the se...

Страница 29: ...deemed as immediately dangerous 7 5 CHECKING THE EXPANSION VESSEL Carry out the component removal procedure as described in 6 4 You must ensure that the boiler is completely drained of water Using a...

Страница 30: ...pletion of any task that required the disconnection and re connection of any electrical wiring or component these checks must be repeated 7 8 FAULT FINDING Before attempting any faultfinding the elect...

Страница 31: ...essed in hundreds e g 25 2 500 rpm GAS VALVE CALIBRATION Connect the boiler to the power supply Open the gas tap Set the function selector to OFF RESET monitor off Remove the screws E remove the casin...

Страница 32: ...ATION To set the temperature regulation curve locate potentiometer P3 By turning P3 the curve is shown on the LCD display The user can adjust the temperature of the heating system indirectly by changi...

Страница 33: ...e connected via a controls interface which enables a connection to be made directly on the PCB at plug CN6 see Fig 8 2 OTHER DEVICES Contact the controls manufacturer and or Vok ra technical departmen...

Страница 34: ...pressure switch S E Spark electrode TSC2 Ignition transformer 3W 3 way motor F O H T Flow over heat thermostat FS Flue sensor FT Flow thermistor NTC RS Return thermistor NTC brown CN3 blue F Hv 1 2 7...

Страница 35: ...THE APPLIANCE GAS TYPE To convert the appliance to another gas type it is necessary to change the injector and adjust the gas valve CO2 To change the injector see 6 12 1 Toreplacetheflangeonthesilence...

Страница 36: ...3 However if the CO2 reading is incorrect the minimum gas pressure must be adjusted as follows locate the minimum adjustment screw fig 44 using a suit able screwdriver remove the protection plug using...

Страница 37: ...ALL INSTALLATIONS If required by the manufacturer record the following CO2 OR CO ppm OR CO CO 2 Ratio The heating and hot water system complies with the appropriate Building Regulations Yes The boile...

Страница 38: ...Signature SERVICE 7 Date Energy Efficiency Checklist completed Yes No Engineer Name Company Name Telephone Number CORGI ID Number Comments Signature SERVICE 9 Date Energy Efficiency Checklist complet...

Страница 39: ......

Страница 40: ...s vokera co uk www vokera co uk www vokera ie Sales General Enquires T 0844 391 0999 F 0844 391 0998 Vok ra Ireland West Court Callan Co Kilkenny T 056 7755057 F 056 7755060 Vok ra Limited reserve the...

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