1. DL manuals
  2. VOKERA
  3. Boiler
  4. Mynute i20
  5. User Instructions

VOKERA Mynute i20 User Instructions

Summary of Mynute i20

  • Page 1

    40 users instructions installation & servicing instructions these instructions to be retained by user vokèra is a licensed member of the benchmark scheme vokèra is a licensed member of the benchmark scheme which aims to improve the standards of installation and which aims to improve the standards of...

  • Page 2

    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 getti...

  • Page 3: Users Instructions

    1 users instructions 1.1 gas appliances gas safety (installations and use) regulations (uk). In the interests of your safety and that of others it is a legal requirement that all gas appliances are installed and correctly maintained by a competent person and in accordance with the latest regulations...

  • Page 4

    2 fig. 1 pressure gauge ensure the system pressure is set correctly (minimum 0.5-bar) mode selector switch/heating temperature selector mode selector switch: boiler at off/standby - select this position when you want the boiler to be switched off for short periods (days). Heating & hot water - selec...

  • Page 5

    3 digital display symbol/icon description displayed when heating mode is active displayed when frost protection function is ac- tive displayed if an alarm or fault has been detected displayed when low system pressure has been detected displayed when an external sensor is connected to the boiler flam...

  • Page 6

    4 3.1 how to top-up the system pressure (fi g. 1-2) the system pressure must be checked periodically to ensure the correct operation of the boiler. The needle on the gauge should be reading between 1 and 1.5 bar when the boiler is in an off position and has cooled to room temperature. If the pressur...

  • Page 7

    5 fault codes alarm code cause alarm type action _st autostop final call engineer _cl call for service temporary then fi nal call engineer a01 ignition failure, fl ame not sensed, internal fault final reset, check appliance operation a02 limit thermostat fault final reset, check appliance operation ...

  • Page 8

    6 all installers are asked to follow the benchmark scheme by adhering to the code of practise, which can be obtained from www.Centralheating.Co.Uk. The mynute i are high-effi ciency system boilers with outputs of 20kw and 30kw. These appliances – by design – incorporate electronic ignition, circulat...

  • Page 9

    7 1.1 principle components  a fully integrated electronic control board featuring electronic temperature control, anti-cycle control, pump over-run, self- diagnostic fault indicator, full air/gas modulation  aluminium heat exchanger  electronic ignition with fl ame supervision  integral high-hea...

  • Page 10

    8 section 2 - technical data 2.1 central heating mynute i20 mynute i30 heat input (kw) 20.00 30.00 maximum heat output (kw) 60/80°c 19.62 29.25 g20 g31 g20 g31 minimum heat output (kw) 60/80°c 2.76 3.95 3.50 4.87 maximum heat output (kw) 30/50°c 21.44 31.77 minimum heat output (kw) 30/50°c 3.00 4.20...

  • Page 11

    9 0,0 1,0 2,0 3,0 4,0 5,0 6,0 0 100 200 300 400 500 600 700 800 900 1000 key location minimum distance a below an opening (window, air-brick, etc.) 300 mm b above an opening (window, air-brick, etc.) 300 mm c to the side of an opening (window, air-brick, etc.) 300 mm d below gutter, drain-pipe, etc....

  • Page 12

    10 section 3 - general requirements (uk) this appliance must be installed by a competent person in ac- cordance with the gas safety (installation & use) regulations. 3.1 related documents the installation of this boiler must be in accordance with the relevant requirements of the gas safety (installa...

  • Page 13

    11 this appliance must be installed by a competent person in accordance with and defi ned by, the standard specifi cation (domestic gas installations) declaration (i.S. 813). 3a.1 related documents the installation of this boiler must be in accordance with the relevant requirements of the local buil...

  • Page 14

    12 the terminal must be protected by a guard of durable material. The guard must be fi tted centrally over the terminal. Refer to i.S. 813, when the terminal is 0.5 metres (or less) below plastic guttering or 1 metre (or less) below painted eaves. 3a.5 air supply the following notes are intended for...

  • Page 15

    13 fig. 10 4.1 delivery due to the weight of the appliance it may be necessary for two people to lift and attach the appliance to its mounting. The appliance is contained within a heavy-duty cardboard carton. Lay the carton on the fl oor with the writing the correct way up. 4.2 contents contained wi...

  • Page 16

    14 extending the flue connect the bend – supplied with the terminal kit – to the top of the boiler using clamp (supplied) see fi g. 10. The additional bends & extensions have push-fi t connections, care should be taken to ensure that the correct seal is made when assembling the fl ue system. Connect...

  • Page 17

    15 4.5.2 concentric vertical flue the appliance can be used with either the vokèra condensing 60/100mm concentric fl ue system or the optional 80/125mm concentric fl ue system. Note these instructions relate only to the vokèra condensing 60/100mm concentric fl ue system. For specifi c details on the...

  • Page 18

    16 note seal the fl ue terminal assembly to the wall using cement or a suitable alternative that will provide satisfactory weatherproof- ing. The interior and exterior trim can now be fi tted. Vertical termination (fi g. 21) the twin fl ue system must be converted to the dedicated con- centric fl ue...

  • Page 19

    17 4.6 connecting the gas and water the appliance is supplied with an accessory pack that includes service valves, sealing washers’ etc, for use with the service valves. 4.6.1 gas (fi g. 22) the appliance is supplied with a 15mm service valve, connect a 15mm pipe to the inlet of the valve and tighte...

  • Page 20

    18 5.1 gas supply installation inspect the entire installation including the gas meter, test for tightness and purge. Refer to bs 6891 (i.S. 813 in roi) for specifi c instruction. 5.2 the heating system the appliance contains components that may become damaged or rendered inoperable by oils and/or d...

  • Page 21

    19 keeping them in a safe place. Explain to the user how to isolate the appliance from the gas, water and electricity supplies and the locations of all drain points. Show the user how to operate the appliance and any associated controls correctly. Show the user the location of the fi lling valve and...

  • Page 22

    20 fig. 26 fig. 27 6.5 pump assembly (fi g. 26) carry out component removal procedure as described in 6.4. Disconnect the fl ow pipe (b) from the combustion chamber connection, slacken the pipe (c) at the hydraulic assembly and swing/rotate clear of the pump assembly. Remove the expansion pipe locki...

  • Page 23

    21 6.14 flue fan & mixer (fi g. 34) carry out component removal procedure as described in 6.4. Unclip and remove the air chamber front and the rh side cov- ers. Slacken the gas pipe (a1) at the air box connection and swing/rotate away from the fan assembly. Locate and remove the sense electrode. To ...

  • Page 24

    22 fig. 35 fig. 37 6.16 main heat exchanger (fi g. 35) carry out component removal procedure as described in 6.4. Unclip and remove the three air chamber covers (front, lh, rh sides). Disconnect all the wiring connections. Fig. 36: slacken the gas pipe ( l1) at the air box connection and swing/rotat...

  • Page 25

    23 fig. 39 a2 b2 c2 d2 6.20 flue collector removal (fi g. 39) carry out component removal procedure as described in 6.16. Locate and remove the screw ( a2) that secures the fl ue gas analysis test point cover ( b2). Remove the clip and the fumes thermostat ( c2). Locate and remove the screws (d2) th...

  • Page 26

    24 7.1 checking appliance operation when carrying out any repairs or servicing to the appliance, the relevant commissioning procedure must be undertaken to ensure the continued safe operation of the appliance. Particular attention should be made to ensure gas tightness, water tight- ness and the ele...

  • Page 27

    25 7.3 checking the co 2 and adjusting the gas valve the gas valve must be set-up or adjusted with the aid of a properly calibrated flue gas analyser. Isolate the appliance from the electrical supply and remove the appliance casing as described in 4.7.1, to gain access to the printed circuit board, ...

  • Page 28

    26 7.9 component values & characteris- tics appliance status led and fault codes when the boiler detects a temporary fault condition, the ap- propriate code is shown. If/when the fault is fi nal, the pump will perform a 60-second post circulation and fault code will be displayed. See table on page. ...

  • Page 29

    27 7.10 adjustments the boiler has already been adjusted by the manufacturer during production. If the adjustments need to be made again, for example after extraordinary maintenance, replacement of the gas valve, or conversion from methane gas to lpg, ob- serve the following procedures. The adjustme...

  • Page 30

    28 7.10.1 checking the fan speed locate the co button (see fig 40 pos sw1). Select the main selector switch to the on position, press the co button once, the display will then scroll through the fan speeds along with the relevant icon. 7.10.2 thermoregulation to set the temperature regulation curve,...

  • Page 31

    29 20 30 40 50 60 70 80 90 100 -20 0,2 0,4 0,6 0,8 1,0 1,5 2,0 2,5 3,0 t80 t45 -15 -10 -5 0 5 10 15 20 climatic curves external temperature (°c) flow outlet tempera ture (°c) t80 maximum set point for standard t range (jp7 removed) t45 maximum set point for low t range (jp7 inserted) fig. 43 cn8 cn7...

  • Page 32

    30 section 8 - wiring diagrams 8.1 external wiring external controls must to be added to the system and they must be connected to the appliance as shown in the following diagrams. For advice on controls that are not featured in this book, please contact vokera technical on 0844 3910999 8.1.1 externa...

  • Page 33

    31 brown cn3 blue f hv 1 2 6 1 cn2 brown blue 2 1 3 5 4 gas valve 12 4 3 ope ope pink blue p brown n l fuse 3.15a f 230 v m3 f blue blue brown brown brown blue 7 1 cn9 w.P.S. 2 3 1 white white tsc2 blue spark electrode brown yellow/green n f cn1 3 1 2 red (+) blue (hs) pink (pwm) grey (-) cn10 f lv ...

  • Page 34

    32 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 purposes bs 6798 installation ...

  • Page 35: Www.Centralheating.Co.Uk

    33 © heating and hotwater industry council (hhic) www.Centralheating.Co.Uk benchmark commissioning and servicing section it is a requirement that the boiler is installed and commissioned to the pdqxidfwxuhuvlqvwuxfwlrqvdqgwkhgdwd¿hogvrqwkhfrpplvvlrqlqjfkhfnolvw completed in full. 7rlqvwljdwhwkherloh...

  • Page 36

    34 $oolqvwdoodwlrqvlq(qjodqgdqg:dohvpxvwehqrwl¿hgwr/rfdo$xwkrulw\%xloglqj&rqwuro/$%&hlwkhugluhfwo\ruwkurxjkd &rpshwhqw3huvrqv6fkhph$%xloglqj5hjxodwlrqv&rpsoldqfh&huwl¿fdwhzloowkhqehlvvxhgwrwkhfxvwrphu zzzfhqwudokhdwlqjfrxn ‹+hdwlqjdqg+rwzdwhu,qgxvwu\&rxqflo++,& this commissioning checklist is to be ...

  • Page 37

    35 $oolqvwdoodwlrqvlq(qjodqgdqg:dohvpxvwehqrwl¿hgwr/rfdo$xwkrulw\%xloglqj&rqwuro/$%&hlwkhugluhfwo\ruwkurxjkd &rpshwhqw3huvrqv6fkhph$%xloglqj5hjxodwlrqv&rpsoldqfh&huwl¿fdwhzloowkhqehlvvxhgwrwkhfxvwrphu ‹+hdwlqjdqg+rwzdwhu,qgxvwu\&rxqflo++,& zzzfhqwudokhdwlqjfrxn it is recommended that your heating sy...

  • Page 38

    36 commissioning: co and combustion ratio check set boiler to maximum rate in accordance with, section 7.3, set boiler to operate at maximum rate (full load condition). Allow sufficient time for combustion to stabilise. , insert analyser probe into air inlet sampling point. Is o2 ш20.6% and co2 veri...

  • Page 39

    39.

  • Page 40

    38 cod. 20073574 - 1 1/13 - ed. 1 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...