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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 
installation of the 80/125mm concentric fl ue system please refer 
to the instructions supplied.
The vertical fl ue terminal can be connected directly to the ap-
pliance fl ue outlet. Alternatively, an extension or bend can be 
connected to the appliance fl ue outlet if desired, however if 
additional bends are fi tted, a reduction must be made to the 
maximum fl ue length (see table below).

Reduction for bends

  Bend  

Reduction in maximum 

fl

 ue length for each bend

 45º bend 

1.0 metre (60/100) - 1.0 metre (80/125)  

 90º bend 

1.0 metre (60/100) - 1.5 metre (80/125) 

Vertical fl ue terminal and accessories

  

Part No. 

Description  

Length

 

 29450122  Vertical fl ue terminal  

1000 mm 

  531 

Pitched roof fl ashing plate 

N/A 

  532 

Flat roof fl ashing plate 

N/A 

  29450123 

90-degree bend 

N/A 

  29450124 

45-degree bends (pair) 

N/A 

  29450125 

500mm extension 

500 mm 

  29450126 

1000mm extension 

1000 mm 

  29450127 

2000mm extension 

2000 mm 

  29450128 

Telescopic extension 

372/519 mm

  529 

Wall bracket pack (5) 

208mm

Using the dimensions given in fi g.16 as a reference, mark and 
cut a 125mm hole in the ceiling and/or roof.

Fig. 16

“X”

12/15/20HE = 202mm
25/30/35HE = 218mm

130mm

Fit the appropriate fl ashing plate to the roof and insert the ver-
tical fl ue terminal through the fl ashing plate from the outside, 
ensuring that the collar on the fl ue terminal fi ts over the fl ashing.
The fi xing holes for the wall-mounting bracket should now be 
drilled and plugged, an ‘appropriate type and quantity of fi xing 
should be used to ensure that the bracket is mounted securely. 
Once the bracket has been secured to the wall, mount the ap-
pliance onto the bracket.

IMPORTANT

The vertical fl ue terminal is 1.0 metre in length and cannot be 
cut; therefore it may be necessary to adjust the height of the 
appliance to suit or use a suitable extension.
Connect the vertical fl ue assembly to the boiler fl ue spigot us-
ing the 100mm clip, gasket & screws (supplied), ensuring the 
correct seal is made. The fl ue support bracket (supplied with 
the vertical fl ue kit) can now be fi tted. 
If the vertical fl ue requires extension/s or additional bend/s, 
connect the required number of fl ue extensions or bends (up 
to the maximum equivalent fl ue length) between the boiler and 
vertical fl ue assembly.
Ensure that any horizontal sections of the fl ue system have a 
minimum 1º; maximum 3º fall back to the boiler (1º = 17mm 
per 1000mm).

NOTE

When cutting an extension to the required length, you must 
ensure that the excess is cut from the plain end of the exten-
sion. Remove any burrs, and check that any seals are located 
properly.
You must ensure that the entire fl ue system is properly sup-
ported and connected.

4.5.3 TWIN FLUE SYSTEM

The Vokèra twin fl ue system enables greater fl ue  distances 
to be achieved than that of a concentric fl ue system. It can be 
used for horizontal or vertical applications, however the twin 
fl ue system must be converted to the dedicated concentric 
fl ue kit for termination. It is essential that the installation of the 
twin fl ue system be carried out in strict accordance with these 
instructions.

GUIDANCE NOTES ON TWIN FLUE INSTALLATION 

• The fl ue must have a have a minimum 1º; maximum 3º (1º = 

17mm per 1000mm) fall back to the appliance to allow any 
condensate that may form in the fl ue system to drain via the 
condensate drain. Consideration must also be given to the 
fact that there is the possibility of a small amount of conden-
sate dripping from the terminal.

•  Ensure that the entire fl ue system is adequately supported, 

use at least one bracket for each extension.

•  As the exhaust outlet pipe can reach very high temperatu-

res it must be protected to prevent persons touching the hot 
surface.

•  The condensate drain pipe must be connected in accordan-

ce with building regulations

Reduction for bends

  Bend  

Reduction in maximum 

fl

 ue length for each bend

  45º bend 

1.0 metre 

  90º bend 

1.5 metre 

Twin fl ue accessories
  

Part No. 

Description 

Length 

  0225805 

Horizontal fl ue terminal 

1.0 metre

  0225810 

Vertical fl ue terminal 

1.0 metre

  359 

Twin adapter kit 

N/A 

  531 

Pitched roof fl ashing plate 

N/A 

  532 

Flat roof fl ashing plate 

N/A 

  0225815 

Condensate drain kit 

N/A 

  0225820 

0.25m extension  (pair) 

250mm 

  0225825 

0.5m extension (pair) 

500mm 

  0225830 

1.0m extension (pair) 

1000mm

  0225835 

2.0m extension (pair) 

2000mm

  0225840 

45º bend (pair) 

N/A 

  0225845 

90º bend (pair) 

N/A 

  0225850 

Twin bracket (5) 

N/A 

  0225855 

Single bracket (5) 

N/A 

MOUNTING THE BOILER

The fi xing holes for the wall-mounting bracket should now be 
drilled and plugged, an appropriate type and quantity of fi xing 
should be used to ensure that the bracket is mounted securely.  
Once the bracket has been secured to the wall, mount the ap-
pliance onto the bracket.

Содержание Mynute i20

Страница 1: ...is a licensed member of the Benchmark scheme which aims to improve the standards of installation and which aims to improve the standards of installation and commissioning of domestic hot water system...

Страница 2: ...Mounting on a combustible surface 12 3A 9 Timber framed buildings 12 3A 10 Inhibitors 12 3A 11 Declaration of conformity 12 Installation Page 4 1 Delivery 13 4 2 Contents 13 4 3 Unpacking 13 4 4 Prep...

Страница 3: ...tomatically Dear Customer Your Vok ra Mynute i 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...

Страница 4: ...unter clockwise to reduce the tem perature range 40 C 80 C for standard central heating The automatic temperature control function SARA is set within the blank bullet points MODE SELECTOR SWITCH HEATI...

Страница 5: ...ance status table for fault indicator and boiler status 2 3 LIGHTING THE BOILER Ensure the gas and electrical supply to the boiler are turned on Turn the mode selector switch to the ON position When t...

Страница 6: ...THE SYSTEM FOR LONG PERIODS If the house is to be left unoccupied for any length of time especially during the winter the system should be thoroughly drained of all water The gas water and electricit...

Страница 7: ...rary then final Reset check appliance operation Temperature differential Final Reset check appliance operation check thermistors A08 Return thermistor fault Temporary Check return thermistor check wir...

Страница 8: ...ons These appliances are designed for use with a sealed system only consequently they are not intended for use on open vented systems This booklet is an integral part of the appliance It is therefore...

Страница 9: ...nissensedbytheelectroniccircuittoensureflamestability at the burner Once successful ignition has been achieved the electronic circuitry increases the gas rate to 75 for a period of 15minutes Thereafte...

Страница 10: ...e i30 Sides 12mm Top 150mm from casing or 25mm above flue elbow whichever is applicable Bottom 150mm Front 600mm 2 7 Connections Mynute i20 Mynute i30 Flow return 22mm Gas 15mm Safety valve 15mm Conde...

Страница 11: ...300 mm Q From the top of the vertical terminal 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...

Страница 12: ...high water content it may be necessary to provide additional expansion capacity see 6 18 3 6 6 FILLING POINT A method for initial filling of the system and replacing water lost during servicing etc di...

Страница 13: ...s 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 building it shouldbefittedinaccordancewiththeInst...

Страница 14: ...es with the local water authority regulations 3A 6 7 LOW PRESSURE SEALED SYSTEM An alternative method of filling the system would be from an independent make up vessel or tank mounted in a position at...

Страница 15: ...on its vertical axis In addition the flue may be extended from the outlet elbow in the horizontal plane see2 9 Areductionmustalsobemadetothemaximumlength see table below when additional bends are use...

Страница 16: ...d be drilled LEVEL to ensure any condense fluid that forms is allowed to drain back to the appliance The fixing holes for the wall mounting bracket should now be drilled and plugged an appropriate typ...

Страница 17: ...ect the required number of flue extensions or bends up to the maximum equivalent flue length between the boiler and vertical flue assembly Ensure that any horizontal sections of the flue system have a...

Страница 18: ...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 19: ...reen yellow to EARTH connection Insertthesupplied3 AMPfuseintothefusedisolatororfusedplug Should the fly lead be unsuitable refer to 4 7 3 for details on how to connect the electrical supply directly...

Страница 20: ...UK to ensure that correct combustion is occurring see flow chart on page 36 Additionally if the gas valve has been adjusted replaced or the appliance has been converted for use with another gas type...

Страница 21: ...SERVICING Check the operation of the appliance and ensure it functions as described in section 7 Compare the performance of the appliance with its design specification The cause of any noticeable dete...

Страница 22: ...and remove the air chamber front cover Remove the AAV locking pin M from the deaerator assembly and remove the AAV assembly N Replace in the reverse order 6 8 WATER PRESSURE SWITCH fig 29 Carry out co...

Страница 23: ...electrode leads and ancillary wiring from their respective connectors Remove the retaining screws W for electrode and remove 6 12 GAS VALVE fig 31 Carry out component removal procedure as described in...

Страница 24: ...cal an external expansion vessel may be fitted to the return pipe as close to the appliance as possible 6 18 1 EXPANSION VESSELREMOVAL with sufficient clearance above fig 37 Carry out component remova...

Страница 25: ...Locate and remove the screw A2 that secures the flue gas analysis test point cover B2 Remove the clip and the fumes thermostat C2 Locate and remove the screws D2 that se cure the flue collector to th...

Страница 26: ...sition and any additional controls time clock programmer room thermostat etc calling for heat the appliance will operate in the heating mode The pump and fan will be activated via the flow temperature...

Страница 27: ...PLETION On completion of the combustion analysis check and or any gas valve adjustment refit the plug fig 40 L2 and move the mode selector through position Remove the test probe from the test point an...

Страница 28: ...at the fuse has failed but no fault is in dicated a detailed continuity check will be required to trace the fault A visual inspection of components may also assist in locating the fault 7 7 3 POLARITY...

Страница 29: ...pm 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 casing remove the re taining screw be...

Страница 30: ...0 15 20 25 30 ROOM TEMPERATURE CURVE OFFSET DELIVERY TEMPERATURE C EXTERNAL TEMPERATURE C Fig 42 The boiler is supplied with the adjustments shown in the table Depending on plant engineering requireme...

Страница 31: ...FLOW OUTLET TEMPERATURE 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 CN6 CN5 CN12 1 JP1 JP2 JP3 JP4 JP5 JP6 JP7 JP8 CN15...

Страница 32: ...appliance can be used with the following controls twin channel programmers The appliance can be used in conjunction with typical S Plan systems and Y Plan systems Please contact Vokera technical shou...

Страница 33: ...CN2 NO NC C black black BE11 FUNCTIONAL DIAGRAM Fig 45 S W CO2 function button F S 1 Flame sensor F1 Fuse 3 15A T F External fuse 3 15A F M3 Terminal strip for electrical connection hight power P Pum...

Страница 34: ...10 0 CO2 minimum output 10 0 10 0 CO maximum output ppm 190 160 CO minimum output ppm 20 15 CO2 FUNCTIONS ACTION ON THE BUTTON DISPLAY combustion analysis mode press once burner running at maximum hea...

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Страница 36: ...OHU LQWHUORFN 3URYLGHG ALL SYSTEMS 7KH V VWHP KDV EHHQ XVKHG DQG FOHDQHG LQ DFFRUGDQFH ZLWK 6 DQG ERLOHU PDQXIDFWXUHU V LQVWUXFWLRQV Yes KDW V VWHP FOHDQHU ZDV XVHG KDW LQKLELWRU ZDV XVHG 4XDQWLW OLWU...

Страница 37: ...HSKRQH 1R DV VDIH UHJLVWHU 1R 5HFRUG W PD UDWH 2 SSP AND 2 W PLQ UDWH KHUH 3RVVLEOH 2 SSP AND 2 RPPHQWV 6LJQDWXUH SERVICE 04 DWH QJLQHHU QDPH RPSDQ QDPH 7HOHSKRQH 1R DV VDIH UHJLVWHU 1R 5HFRUG W PD UD...

Страница 38: ...R TO MINIMUM RATE In accordance with section 7 3 set boiler to operate at minimum rate to minimum load condition Allow sufficient time for combustion to stabilise YES Is CO 350ppm and CO CO2 ratio les...

Страница 39: ...39...

Страница 40: ...ies 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 t...

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