Vokèra Mynute i20 Manual
Vokèra
Centralvarmekedel
Mynute i20
Læs gratis den danske manual til Vokèra Mynute i20 (40 sider) i kategorien Centralvarmekedel. Denne vejledning er vurderet som hjælpsom af 65 personer og har en gennemsnitlig bedømmelse på 4.5 stjerner ud af 33 anmeldelser. Har du et spørgsmål om Vokèra Mynute i20, eller vil du spørge andre brugere om produktet?
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40
Users Instructions
Installation &
Servicing
Instructions
THESE INSTRUCTIONS
TO BE RETAINED
BY USER
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commissioning of domestic hot water systems in the UK.
commissioning of domestic hot water systems in the UK.
commissioning of domestic hot water systems in the UK.commissioning of domestic hot water systems in the UK.commissioning of domestic hot water systems in the UK.
Mynute i
High effi ciency system boiler
Mynute G.C. N. 41 094 81 i20
Mynute G.C. N. 41 094 82i30
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 3
2.2 Appliance controls 3
2.3 Lighting the boiler 3
2.4 Adjusting the heating temperature 3
2.5 Explanation of features 3
2.6 Automatic temperature control 3
How to... Page
3.1 How to top-up the system pressure 4
3.2 How to reset the appliance 4
3.3 How to shut down the system for short periods 4
3.4 How to shut down the system for long periods 4
3.5 How to care for the appliance 4
What if... Page
4.1 What if I suspect a gas leak 4
4.2 What if I have frequently top-up the system 4
4.3 What if the appliance is due its annual service 4
4.4 What if I need to call an engineer 4
Installation and Servicing instructions
Design principles & operating sequence Page
1.1 Principle components 7
1.2 Mode of operation (at rest) 7
1.3 Mode of operation (heating) 7
1.4 Safety devices 7
Technical data Page
2.1 Central heating 8
2.2 Gas pressures 8
2.3 Expansion vessel 8
2.4 Dimensions 8
2.5 Clearances 8
2.6 Connections 8
2.7 Electrical 8
2.8 Flue details (concentric) 8
2.8A Flue details (twin pipes) 8
2.9 Effi ciency 8
2.10 Emissions 8
2.11 Pump duty 9
General requirements (UK) Page
3.1 Related documents 10
3.2 Location of appliance 10
3.3 Gas supply 10
3.4 Flue system 10
3.5 Air supply 10
3.6 Water circulation 10
3.7 Electrical supply 11
3.8 Mounting on a combustible surface 11
3.9 Timber framed buildings 11
3.10 Inhibitors 11
General requirements (EIRE) Page
3A.1 Related documents 11
3A.2 Location of appliance 11
3A.3 Gas supply 11
3A.4 Flue system 11
3A.5 Air supply 12
3A.6 Water circulation 12
3A.7 Electrical supply 12
3A.8 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 Preparation for mounting the appliance 13
4.5 Fitting the fl ue 13
4.6 Connecting the gas & water 17
4.7 Electrical connections 17
Commissioning Page
5.1 Gas supply installation 18
5.2 The heating system 18
5.3 Initial fi lling of the system 18
5.4 Initial fl ushing of the system 18
5.5 Pre-operation checks 18
5.6 Initial lighting 18
5.7 Checking gas pressure & combustion analysis 18
5.8 Final fl ushing of the heating system 18
5.9 Setting the boiler operating temperature 18
5.10 Setting the system design pressure 18
5.11 Regulating the central heating system 19
5.12 Final checks 19
5.13 Instructing the user 19
Servicing Page
6.1 General 19
6.2 Routine annual servicing 19
6.3 Replacement of components 19
6.4 Component removal procedure 19
6.5 Pump assembly 20
6.6 Safety valve 20
6.7 Lower automatic air release valves 20
6.8 Water pressure switch 20
6.9 Flow thermistor 20
6.10 Return thermistor 20
6.11 Printed circuit board 20
6.12 Gas valve 21
6.13 Electrodes 21
6.14 Flue fan & mixer 21
6.15 Burner 21
6.16 Main heat exchanger 22
6.17 Automatic by-pass 22
6.18 Expansion vessel removal 22
6.19 Condense trap removal 22
6.20 Flue collector removal 23
Checks, adjustments and fault fi nding Page
7.1 Checking appliance operation 23
7.2 Appliance modes of operation 23
7.3 Checking the CO2 & adjusting the valve 24
7.4 Combustion analysis test 24
7.5 Checking the expansion vessel 24
7.6 External faults 25
7.7 Electrical checks 25
7.8 Fault fi nding 25
7.9 Component values & characteristics 25
7.10 Adjustments 26
Wiring diagrams Page
8.1 External wiring 29
8.2 Typical control applications 29
8.3 Other devices 29
L.P.G. instructions Page
9.1 Related documents 31
9.2 Technical data 31
9.3 Converting the appliance gas type 31
9.4 Gas supply 31
9.5 Gas supply installation 31
9.6 Checking the CO2 and adjusting the gas valve 31
Benchmark 34-35
Commissioning 36
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.
1.2 ELECTRICAL SUPPLY
Please ensure that this appliance has been properly connected
to the electrical supply by means of a double pole isolator or
un-switched socket, and that the correct size of fuse (3 AMP)
has been fi tted.
Warning: this appliance must be earthed!
1.3 GUARANTEE REGISTRATION CARD
Please take the time to fi ll out your guarantee registration card.
The completed warranty card should be posted within 30 days
of installation.
1.4 APPLIANCE COMMISSIONING CHECKLIST
(UK only)
A checklist section can be found at the rear of the appliance
installation booklet. This important document must be com-
pleted during the installation/commissioning of your boiler. All
GAS SAFE registered installers carry a GAS SAFE ID card,
and have a registration number. These details should be re-
corded in the Benchmark commissioning checklist section
within the installation booklet. You can check your installers
details by calling GAS SAFE direct on 08004085500. Failure
to install and commission the appliance in accordance with
the manufacturers instructions will invalidate the warranty.
This does not affect your statutory rights.
1.5 HOW DOES IT WORK?
Your Mynute i boiler supplies heated water to your radiators
and hot water to your hot water tank. The central heating is
controlled via a time clock and any thermostats that your installer
may have fi tted. The boiler will light when it receives a request
from the time clock via any thermostat that may be installed.
Your Mynute i boiler lights electronically and does not have a pilot
light. In the unlikely event of a fault developing with your boiler,
the supply of gas to the burner will be terminated automatically.
Dear Customer
Your Vokèra Mynute boiler has been designed to meet and exceed the very latest standards in gas central heating technology, i
and if cared for, will give years of reliable use and effi ciency.
Please therefore take some time to read these instructions carefully.
Do’s and Don’t’s
- ensure that the system pressure is periodically checkedDo
- ensure that the boiler should not be used by children or unassisted disabled peopleDo
- ensure that you know how to isolate the appliance in an emergencyDo
- ensure that you are familiar with the appliance controlsDo
- ensure that your installer has completed the appliance log book sectionDo
- attempt to remove the appliance casing or gain internal accessDo not
- hang clothes etc. over the applianceDo not
- forget to have the appliance serviced annually.Do not
This booklet is an integral part of the appliance. It is therefore necessary to ensure that the booklet is handed to the person re-
sponsible for the property in which the appliance is located/installed. A replacement copy can be obtained from Vokèra customer
services.
INTRODUCTION
1.6 DIMENSIONS
1.7 CLEARANCES REQUIRED
1.8 FROST PROTECTION SYSTEM
The Mynute i is equipped with a built-in frost protection system,
this enables the boiler to over-ride the time controls – even if
switched off – and operate the burner and/or pump, should
the temperature drop below 50C for the main. In particular the
burner will be in ON status until the main temperature reaches
35°C for CH appliance.
Please note that the frost protection system is designed to
protect the appliance only, should frost protection be required
for the heating system, additional controls may be required.
NOTE
The frost protection system is reliant on the appliance having a
permanent electrical supply, and being in a non-fault condition.
1.9 APPLIANCE STATUS INDICATORS
Your boiler is equipped with a large LCD display that indicates
the appliance operating status.
1. THINGS YOU SHOULD KNOW
Mynute Mynute i20 i30
HEIGHT 780 mm 780 mm
WIDTH 400 mm 400 mm
DEPTH 338 mm 388 mm
ABOVE 150 mm
BELOW 150 mm
LEFT SIDE 12 mm
RIGHT SIDE 12 mm
FRONT 600 mm
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 - Select this position when you want the boiler to re-
spond to a heating and hot water request from the time-clock programmer
Heating temperature selector: move the selector clockwise to increase
the heating outlet temperature, or counter-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
HEATING TEMPERATURE SELECTOR
PRESSURE GAUGE
Boiler reset - Select this position if the boiler requires to be reset.
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 slightly, this is quite normal. The minimum
permissible level for the safe and effi cient operation of the appliance is
0.5 BAR. Should the pressure fall below 0.5 BAR, the boiler may lockout.
correct
pressure
value
DISPLAY
SARA
function
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
Flame on
Displayed if an ignition fault has been detected
2.1 BEFORE SWITCHING ON
Before switching the appliance on, please familiarise yourself
with:
- how to isolate the appliance from the gas, water, and electricity
supplies;
- how to check and top-up – if necessary – the system water
pressure;
- the time clock or programmer (if fi tted);
- any external thermostats and their functions;
- the appliance controls.
2.2 APPLIANCE CONTROLS (see fi g. 1)
The appliance controls are situated on the lower front of the
appliance. The appliance controls include:
- pressure gauge;
- appliance mode selector;
- temperature selector
NOTE
The appliance frost protection is active in all the boiler modes.
The temperature selector can be used to vary the temperature
of the water that circulates around your radiators.
The temperature range is adjustable between 40°C and 80°C.
Refer to the main appliance 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 position. When there ON
is a request for heating or hot water via the time clock or pro-
grammer, the boiler will begin an ignition sequence. When the
appliance reaches the CH set temperature, the burner will go
off for a minimum period of approximately 3 minutes.
When the programmer/time clock or external thermostats
heating request has been satisfi ed, the appliance will switch
off automatically.
2.4 ADJUSTING THE HEATING TEMPERATURE
Rotate the temperature selector – clockwise to increase, counter-
clockwise to decrease – to the desired temperature setting. The
temperature can be set from a minimum of 40°C to a maximum
of 80°C (if standard CH mode is selected).
2.5 EXPLANATION OF FEATURES
Although the Vokèra Mynute i has been designed for simplicity
of use, it utilises the latest in boiler technology, enabling a host
of functions to be carried out simultaneously.
2.6 AUTOMATIC TEMPERATURE CONTROL
The automatic temperature control function (SARA), permits the
boiler (when the heating temperature selector is set within the
blank bullet points) to automatically adjust (raise) the heating.
The activation and the disable of the function is visualized on
the display.
2. GETTING STARTED
65
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
A03 Fan tacho signal fault Final Reset check appliance operation, check fan
A04 Insuffi cient system water pressure Final Check/refi ll system pressure, reset, check
appliance operation
A06 Jumper tag confi guration Temporary Check jumper tag confi guration
A07
Primary (fl ow) thermistor fault Temporary Check primary thermistor, check wiring
Primary (fl ow) thermistor over temperature
Temporary then fi nal Reset, check appliance operation
Temperature differential Final Reset, check appliance operation, check
thermistors
A08
Return thermistor fault Temporary Check return thermistor, check wiring
Return thermistor over temperature Temporary then fi nal Reset, check appliance operation
Temperature differential inverted Final Reset, check pump, ensure there is suf-
fi cient circulation around heating circuit/s
A09
Flue thermistor or fl ue thermistor
counter fault Temporary Check fl ue thermistor counter at power
on, check fl ue thermistor, check wiring
Flue thermistor over temperature Final Reset, check appliance operation
A11 False fl ame Temporary None
A77 Low temperature thermostat fault Temporary Check low temperature thermostat
Adj Calibration Na None
ACO Service operation Na None
Purge cycle mode active Na None
Flame ON Na None
Hours Stand-by Na None
- - OFF Na None
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-head pump
Fan
Expansion vessel
Water pressure switch
Flue sensor
Pressure gauge
Safety valve
1.2 MODE OF OPERATION (at rest)
When the appliance is at rest and there are no requests for
heating or hot water, the following functions are active:
frost-protection system – the frost-protection system protects
the appliance against the risk of frost damage. For CH line, if
the main temperature falls to 5°C, the appliance will function
on minimum power until the temperature on main reaches
35°C.
anti-block function – the anti-block function enables the pump
to be energised for short periods, when the appliance has
been inactive for more than 24-hours.
1.3 MODE OF OPERATION (Heating)
When there is a request for heat via the time clock and/or any
external control, the pump and fan are started, the fan speed
will modulate until the correct signal voltage is received at the
control PCB. At this point an ignition sequence is enabled.
Ignition is sensed by the electronic circuit to ensure fl ame stability
at the burner. Once successful ignition has been achieved, the
electronic circuitry increases the gas rate to 75% for a period of
15 minutes. Thereafter, the boiler’s output will either be increase
to maximum or modulate to suit the set requirement. When
the appliance reaches the desired temperature the burner will
shut down and the boiler will perform a three-minute anti-cycle
(timer delay).
When the request for heat has been satisfi ed the appliance
pump and fan may continue to operate to dissipate any residual
heat within the appliance.
1.4 SAFETY DEVICES
When the appliance is in use, safe operation is ensured by:
a water pressure switch that monitors system water pressure
and will de-activate the pump, fan, and burner should the
system water pressure drop below the rated tolerance;
fan speed sensor to ensure safe operation of the burner;
a high limit thermostat that over-rides the temperature control
circuit to prevent or interrupt the operation of the burner;
fl ame sensor that will shut down the burner when no fl ame
signal is detected;
fl ue sensor;
a safety valve which releases excess pressure from the
primary circuit.
Fig. 4
Safety
valve
Pump
Main heat
exchanger
Bottom
AAV
Drain
valve
Flow temperature
sensor
Top AAV
Automatic
by-pass
CH
return
CH
fl ow
SECTION 1 - DESIGN PRINCIPLES AND OPERATING SEQUENCE
Pressure
switch
Return
temperature
sensor
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 3.80 5.29
Minimum working pressure 0.25-0.45 bar
Maximum working pressure 2.5 bar
Minimum fl
ow rate
300 l/h 2.3 Gas Pressures Mynute i20 Mynute i30
Inlet pressure (G20) 20.0 mbar
Heating maximum gas rate (m3 /hr) 2.12 3.17
Minimum gas rate (m3 /hr) 0.30 0.38
Injector size (mm) 4.70 fl ap side - 4.20 free side 5.10 fl ap side - 4.70 free side
2.4 Expansion Vessel Mynute i20 Mynute i30
Capacity 8 litres
Maximum system volume 76 litres
Pre-charge pressure 1 bar
2.5 Dimensions Mynute i20 Mynute i30
Height (mm) 780
Width (mm) 400
Depth (mm) 338 388
Dry weight (kg) 40 38
2.6 Clearances Mynute i20 Mynute i30
Sides 12mm
Top 150mm from casing or 25mm above fl ue elbow (whichever is applicable)
Bottom 150mm
Front 600mm
2.7 Connections Mynute i20 Mynute i30
Flow & return 22mm
Gas 15mm
Safety valve 15mm
Condense 21mm
2.8 Electrical Mynute i20 Mynute i30
Power consumption (Watts) 102 118
Voltage (V/Hz) 230/50
Internal fuse 3.15A T (for PCB) - 3.15A F (for connections block)
External fuse 3A
2.9 Flue Details (concentric 60-100) Mynute i20 Mynute i30
Maximum horizontal fl ue length (60/100mm) 7.80m 7.85m
Maximum vertical fl ue length (60/100mm) 8.80m 8.85m
2.9A Flue Details (concentric 80-125) Mynute i20 Mynute i30
Maximum horizontal fl ue length (80/125mm) 20m 14.85m
Maximum vertical fl ue length (80/125mm) 21m 15.85m
2.9B Flue Details (twin pipes) Mynute i20 Mynute i30
Maximum horizontal fl ue length (80mm/80mm) 50m/50m 38m/38m
Maximum vertical fl ue length (80mm/80mm) 50m/50m 38m/38m
2.10 Effi ciency Mynute i20 Mynute i30
UK (%) 2005 90.30 90.03
2.11 Emissions Mynute i20 Mynute i30
CO2 @ maximum output (%) 9.0
CO2 @ minimum output (%) 9.0
CO @ maximum output (ppm) 150
CO @ minimum output (ppm) 10 5
Nox rating class 5
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. 25 mm
E Below eaves 25 mm
F Below balcony, car-port roof, etc. 25 mm
G To the side of a soil/drain-pipe, etc. 25 mm (60mm for 80/125 - 5” fl ue)
H From internal/external corner 25 mm (60mm for 80/125 - 5” fl ue)
I Above ground, roof, or balcony level 300 mm
J From a surface or boundary facing the terminal 600 mm
K From a terminal facing a terminal 1200 mm
L From an opening in the car-port into the building 1200 mm
M Vertically from a terminal on the same wall 1500 mm
N Horizontally from a terminal on the same wall 300 mm
P From a structure to the side of the vertical terminal 300 mm
Q From the top of the vertical terminal to the roof fl ashing As determined by the fi xed 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 window on a pitched roof 2000 mm
V From a vertical terminal to an adjacent opening (window, air-brick, etc.) (call Vokera technical for advice)
W From a vertical terminal to an adjacent vertical terminal
300 mm (only if both terminals are the same hight)
Fig. 5
2.11 PUMP DUTY
Fig. 6 shows the fl ow-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.
Fig. 6
1st speed
2nd speed
3rd speed
Flow rate (l/h)
Residual head (x 100 mbar)
Mynute i20 Mynute i30
0,0
0,2
0,4
0,6
0,8
1,0
1,2
1,4
1,6
1,8
2,0
2,2
2,4
2,6
2,8
3,0
3,2
3,4
3,6
3,8
4,0
4,2
4,4
4,6
4,8
5,0
5,2
5,4
0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600
Flow rate (l/h)
Residual head (x 100 mbar)
1st speed
2nd speed
3rd speed
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 (Installation & Use)
Regulations, the local building regulations, the current I.E.E.
wiring regulations, the bylaws of the local water undertaking,
the Building Standards (Scotland) Regulation and Building
Standards (Northern Ireland) Regulations.
It should be in accordance also with any relevant requirements
of the local authority and the relevant recommendations of the
following British Standard Codes of Practice.
3.2 LOCATION OF APPLIANCE
The appliance may be installed in any room or internal space,
although particular attention is drawn to the requirements
of the current I.E.E. wiring regulations, and in Scotland, the
electrical provisions of the Building Regulations, with respect
to the installation of the appliance in a room or internal space
containing a bath or shower.
BS 5440 PART 1 FLUES
BS 5440 PART 2 FLUES & VENTILATION
BS 5449 PART 1 FORCED CIRCULATION HOT WATER SYSTEMS
BS 5546 INSTALLATION OF GAS HOT WATER SUPPLIES FOR DOMESTIC PURPOSES
BS 6798 INSTALLATION OF BOILERS OF RATED INPUT NOT EXCEEDING 60kW
BS 6891 LOW PRESSURE INSTALLATION PIPES
BS 7074 PART 1 APPLICATION, SELECTION, AND INSTALLTION OF EXPANSION VESSELS
AND ANCILLARY EQUIPMENT FOR SEALED WATER SYSTEMS
3.5 AIR SUPPLY
The following notes are intended for general guidance only.
This appliance is a room-sealed, fan-fl ued boiler, consequently
it does not require a permanent air vent for combustion air sup-
ply. When installed in a cupboard or compartment, ventilation
for cooling purposes is also not required.
3.6 WATER CIRCULATION
Detailed recommendations are given in BS 5449 Part 1 and
BS 6798. The following notes are for general guidance only.
3.6.1 PIPEWORK
It is recommended that copper tubing to BS 2871 Part 1 is used
in conjunction with soldered capillary joints. Where possible
pipes should have a gradient to ensure air is carried naturally to
air release points and that water fl ows naturally to drain cocks.
Except where providing useful heat, 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 fl oors, loft space and
void areas.
3.6.2 AUTOMATIC BY-PASS
The appliance has a built-in automatic by-pass, consequently
there is no requirement for an external by-pass, however the
design of the system should be such that it prevents boiler
‘cycling’.
3.6.3 DRAIN COCKS
These must be located in accessible positions to facilitate
draining of the appliance and all water pipes connected to the
appliance. The drain cocks must be manufactured in accord-
ance with BS 2879.
3.6.4 AIR RELEASE POINTS
These must be positioned at the highest points in the system
where air is likely to be trapped. They should be used to expel
trapped air and allow complete fi lling of the system.
3.6.5 EXPANSION VESSEL
The appliance has an integral expansion 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 suffi cient, however if the system
has an unusually high water content, it may be necessary to
provide additional expansion capacity (see 6.18).
3.6.6 FILLING POINT
A method for initial fi lling of the system and replacing water lost
during servicing etc. directly from the mains supply, should be
provided (see fi g. 8). This method of fi lling complies with the
current Water Supply (Water Fittings) Regulations 1999 and
Water Bylaws 2000 (Scotland). If an alternative location.
3.6.7 LOW PRESSURE SEALED SYSTEM
An alternative method of fi lling 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 above the boiler (see fi g. 8).
The cold feed from the make-up vessel or tank must be fi tted
with an approved non-return valve and stopcock for isolation
purposes. The feed pipe should be connected to the return pipe
as close to the boiler as possible.
3.6.8 FREQUENT FILLING
Frequent fi lling or venting of the system may be indicative
of a leak. Care should be taken during the installation of the
appliance to ensure all aspects of the system are capable of
withstanding pressures up to at least 3 bar.
When an appliance is installed in a room or internal space
containing a bath or shower, the appliance or any control per-
taining to it must not be within reach of a person using the bath
or shower. The location chosen for the appliance must permit
the provisions of a safe and satisfactory fl ue and termination.
The location must also permit an adequate air supply for com-
bustion purposes and an adequate space for servicing and air
circulation around the appliance. Where the installation of the
appliance will be in an unusual location special procedures may
be necessary, BS 6798 gives detailed guidance on this aspect.
A compartment used to enclose the appliance must be designed
and constructed specifi cally for this purpose. An existing com-
partment/cupboard may be utilised provided that it is modifi ed
to suit. Details of essential features of compartment/cupboard
design including airing cupboard installations are given in BS
6798. This appliance is not suitable for external installation.
3.3 GAS SUPPLY
The gas meter – as supplied by the gas supplier – must be
checked to ensure that it is of adequate size to deal with the
maximum rated input of all the appliances that it serves. Instal-
lation pipes must be fi tted in accordance with BS 6891.
Pipe work from the meter to the appliance must be of adequate
size. Pipes of a smaller size than the appliance gas inlet con-
nection must not be used. The installation must be tested for
tightness in accordance with BS6891. If the gas supply serves
more than one appliance, it must be ensured that an adequate
supply is maintained to each appliance when they are in use
at the same time.
3.4 FLUE SYSTEM
The terminal should be located where the dispersal of combustion
products is not impeded and with due regard for the damage
and discoloration that may occur to building products located
nearby. The terminal must not be located in a place where it
is likely to cause a nuisance (see fi g. 6). In cold and/or humid
weather, water vapour will condense on leaving the terminal;
the effect of such pluming must be considered.
If installed less than 2m above a pavement or platform to
which people have access (including balconies or fl at roofs)
the terminal must be protected by a guard of durable material.
The guard must be fi tted centrally over the terminal. Refer to
BS 5440 Part 1, when the terminal is 0.5 metres (or less) below
plastic guttering or 1 metre (or less) below painted eaves.
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 building regulations, the
current ETCI National Rules for Electrical Installations and the
bylaws of the local water undertaking.
It should be in accordance also with any relevant requirements
of the local and/or district authority.
3A.2 LOCATION OF APPLIANCE
The appliance may be installed in any room or internal space,
although particular attention is drawn to the requirements of
the current ETCI National Rules for Electrical Installations, and
I.S. 813, Annex K.
When an appliance is installed in a room or internal space
containing a bath or shower, the appliance or any control
pertaining to it must not be within reach of a person using the
bath or shower.
The location chosen for the appliance must permit the pro Mynute
i of a safe and satisfactory fl ue and termination. The location
must also permit an adequate air supply for combustion purposes
and an adequate space for servicing and air circulation around
the appliance. Where the installation of the appliance will be
in an unusual location special procedures may be necessary,
refer to I.S. 813 for detailed guidance on this aspect.
A compartment used to enclose the appliance must be de-
SECTION 3A - GENERAL REQUIREMENTS (EIRE)
3.7 ELECTRICAL SUPPLY
The appliance is supplied for operation on 230V @ 50Hz electri-
cal supply; it must be protected with a 3-amp fuse. The method
of connection to the mains electricity supply must allow for
complete isolation from the supply. The preferred method is by
using a double-pole switch fused spur with a contact separation
of at least 3,5mm (3° high-voltage category). The switch must
only supply the appliance and its corresponding controls, i.e.
time clock, room thermostat, etc. Alternatively an un-switched
shuttered socket with a fused 3-pin plug both complying with
BS 1363 is acceptable.
3.8 MOUNTING ON A COMBUSTIBLE SURFACE
If the appliance is to be fi tted on a wall of combustible mate-
rial, there is no requirement for a sheet of fi reproof material to
protect the wall.
3.9 TIMBER FRAMED BUILDINGS
If the appliance is to be fi tted in a timber framed building, it
should be fi tted in accordance with the Institute of Gas Engineers
publication (IGE/UP/7) ‘Guide for Gas Installations in Timber
Frame Buildings’.
3.10 INHIBITORS
Vokèra recommend that an inhibitor - suitable for use with
aluminium heat exchangers - is used to protect the boiler and
system from the effects of corrosion and/or electrolytic action.
The inhibitor must be administered in strict accordance with
the manufacturers instructions*.
*Water treatment of the complete heating system - including
the boiler - should be carried out in accordance with BS 7593
and the Domestic Water Treatment Association’s (DWTA) code
of practice.
fl ow/return
pipe
control
valve
temporary
connection
control
valve
supply
pipe
double
check valve
Fig. 7
Fig. 8
Make-up vessel
or tank
Automatic
air-vent
Non-return
valve
Stopcock
5.0 metres minimum
Heating
return
signed and constructed specifi cally for this purpose. An exist-
ing compartment/cupboard may be utilised provided that it is
modifi ed to suit.
This appliance is not suitable for external installation.
3A.3 GAS SUPPLY
The gas meter – as supplied by the gas supplier – must be
checked to ensure that it is of adequate size to deal with the
maximum rated input of all the appliances that it serves. Instal-
lation pipes must be fi tted in accordance with I.S. 813.
Pipe work from the meter to the appliance must be of adequate
size. Pipes of a smaller size than the appliance gas inlet con-
nection must not be used. The installation must be tested for
tightness in accordance with I.S. 813.
If the gas supply serves more than one appliance, it must be
ensured that an adequate supply is maintained to each appli-
ance when they are in use at the same time.
3A.4 FLUE SYSTEM
The terminal should be located where the dispersal of combustion
products is not impeded and with due regard for the damage
and discoloration that may occur to building products located
nearby. The terminal must not be located in a place where it
is likely to cause a nuisance (see I.S. 813).
In cold and/or humid weather, water vapour will condense
on leaving the terminal; the effect of such pluming must be
considered.
If installed less than 2m above a pavement or platform to
which people have access (including balconies or fl at roofs)
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 general guidance only.
This appliance is a room-sealed, fan-fl ued boiler, consequently it
does not require a permanent air vent for combustion air supply.
When installed in a cupboard or compartment, ventilation for
cooling purposes is also not required.
3A.6 WATER CIRCULATION
Specifi c recommendations are given in I.S. 813. The following
notes are for general guidance only.
3A.6.1 PIPEWORK
It is recommended that copper tubing be used in conjunction
with soldered capillary joints.
Where possible pipes should have a gradient to ensure air
is carried naturally to air release points and that water fl ows
naturally to drain cocks.
Except where providing useful heat, 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 fl oors, loft space and
void areas.
3A.6.2 AUTOMATIC BY-PASS
The appliance has a built-in automatic by-pass, consequently
there is no requirement for an external by-pass, however the
design of the system should be such that it prevents boiler
‘cycling’.
3A.6.3 DRAIN COCKS
These must be located in accessible positions to facilitate
draining of the appliance and all water pipes connected to the
appliance.
3A.6.4 AIR RELEASE POINTS
These must be positioned at the highest points in the system
where air is likely to be trapped. They should be used to expel
trapped air and allow complete fi lling of the system.
3A.6.5 EXPANSION VESSEL
The appliance has an integral expansion 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 suffi cient, however if the system
has an unusually high water content, it may be necessary to
provide additional expansion capacity (see 6.18).
3A.6.6 FILLING POINT
A method for initial fi lling of the system and replacing water lost
during servicing etc. is provided (see fi g. 7). You should ensure
this method of fi lling complies with the local water authority
regulations.
3A.6.7 LOW PRESSURE SEALED SYSTEM
An alternative method of fi lling 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 above the boiler (see fi g. 8). The cold feed from
the make-up vessel or tank must be fi tted with an approved
non-return valve and stopcock for isolation purposes. The feed
pipe should be connected to the return pipe as close to the
boiler as possible.
3A.6.8 FREQUENT FILLING
Frequent fi lling or venting of the system may be indicative
of a leak. Care should be taken during the installation of the
appliance to ensure all aspects of the system are capable of
withstanding pressures up to at least 3 bar.
3A.7 ELECTRICAL SUPPLY
The appliance is supplied for operation on 230V @ 50Hz electri-
cal supply; it must be protected with a 3-amp fuse. The method
of connection to the mains electricity supply must allow for
complete isolation from the supply. The preferred method is by
using a double-pole switch fuse spur with a contact separation
of at least 3,5 mm (3° high-voltage category). The switch must
only supply the appliance and its corresponding controls, i.e.
time clock, room thermostat, etc.
3A.8 MOUNTING ON A COMBUSTIBLE SURFACE
If the appliance is to be fi tted on a wall of combustible mate-
rial, there is no requirement for a sheet of fi reproof material to
protect the wall.
3A.9 TIMBER FRAMED BUILDINGS
If the appliance is to be fi tted in a timber framed building, it
should be fi tted in accordance with I.S. 813 and local Building
Regulations.
The Institute of Gas Engineers publication (IGE/UP/7) ‘Guide
for Gas Installations in Timber Frame Buildings’ gives specifi c
advice on this type of installation.
3A.10 INHIBITORS
Vokèra recommend that an inhibitor - suitable for use with
aluminium heat exchangers - is used to protect the boiler and
system from the effects of corrosion and/or electrolytic action.
The inhibitor must be administered in strict accordance with
the manufacturers instructions*.
*Water treatment of the complete heating system - including
the boiler - should be carried out in accordance with I.S. 813
and the Domestic Water Treatment Association’s (DWTA) code
of practice.
3A.11 DECLARATION OF CONFORMITY
A Declaration of Conformity (as defi ned in I.S. 813) must be
provided on completion of the installation.
A copy of the declaration must be given to the responsible
person and also to the gas supplier if required.
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 within the carton is:
the boiler
the wall bracket
carton template
an accessories pack containing appliance service connections
and washers
the instruction pack containing the installation, servicing & user
instructions, guarantee registration card and a 3-amp fuse.
4.3 UNPACKING
At the top of the carton pull both sides open – do not use a
knife – unfold the rest of the carton from around the appliance,
carefully remove all protective packaging from the appliance and
lay the accessories etc. to one side. Protective gloves should
be used to lift the appliance, the appliance back-frame should
be used for lifting points.
4.4 PREPARATION FOR MOUNTING THE AP-
PLIANCE
The appliance should be mounted on a smooth, vertical surfa-
ce, which must be capable of supporting the full weight of the
appliance. Care should be exercised when determining the
position of the appliance with respect to hidden obstructions
such as pipes, cables, etc.
When the position of the appliance has been decided – using
the template supplied – carefully mark the position of the wall
mounting bracket (see fi g. 11) and fl ue-hole (if applicable).
4.5 FITTING THE FLUE
The top fl
ue outlet permits both horizontal and vertical
fl ue ap-
plications to be considered, alternatively, the Vokèra twin fl ue
system can be utilised if longer fl ue runs are required.
4.5.1 CONCENTRIC HORIZONTAL FLUE
(For concentric vertical fl ue, see 4.5.2).
(For twin fl ue applications, see 4.5.3).
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 to the Vokèra condensing only
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 appliance fl ue outlet elbow can
be rotated through 360º on its vertical axis. In addition the fl ue
may be extended from the outlet elbow in the horizontal plane
(see 2.9). A reduction must also be made to the maximum length
(see table below) when additional bends are used.
Reduction for additional 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)
Horizontal fl ue terminals and accessories
Part No. Description Length
29450120 Horizontal fl ue kit 900 mm
29450121 Telescopic fl ue kit 455/630 mm
522 Plume management kit 1370 mm
29450123 90-degree bend N/A
29450124 45-degree bends (pair) N/A
29450125 500mm extension 500 mm
29450126 1000mm extension 1000 mm
29450127 2000m extension 2000 mm
29450128 Telescopic extension 372/519 mm
529 Wall bracket pack (5) 208mm
Using the template provided, mark and drill a 125mm hole for
the passage of the fl ue pipe. The hole should be drilled to ensure
any condense fl uid that forms, is allowed to drain back to the
appliance (see fi g. 12-14). 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 A
appliance onto the bracket.
FITTING THE HORIZONTAL FLUE KIT
Carefully measure the distance from the centre of the appliance
fl
ue outlet to the edge of the
fi nished outside wall (dimension
X). Add 65mm to dimension X to give you Dimension Y (see
fi g 16). Measure dimension Y from the terminal end of the con-
centric fl ue pipe and cut off the excess ensuring any burrs are
removed. Pass the concentric fl ue pipe through the previously
drilled hole. Fit the fl
ue bend to the boiler
fl ue outlet and insert
the concentric fl
ue pipe into the
fl ue bend ensuring the correct
seal is made. Using the clamp, gasket, and screws supplied,
secure the fl ue bend to the appliance fl ue spigot.
NOTE
Fit the internal (white) trim to the fl ue assembly prior to con-
necting the fl ue pipe to the bend.
You must ensure that the entire fl ue system is properly sup-
ported and connected. Seal the fl ue assembly to the wall using
cement or a suitable alternative that will provide satisfactory
weatherproofi ng. The exterior trim can now be fi tted.
SECTION 4 - INSTALLATION
Fig. 9
A
Terminal or
extension
Outer clamps
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 the required number of fl ue exten-
sions or bends (up to the maximum equivalent fl ue length) to
the fl ue terminal (see fi
g. 10-12).
The fl ue system should have
a minimum of 1º; maximum of 3º rise from the boiler to outside,
to ensure any condense fl uid that forms, is allowed to drain
back to the appliance.
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 all seals are located
properly. You must ensure that the entire fl ue system is properly
supported and connected. Seal the fl ue assembly to the wall us-
ing cement or a suitable alternative that will provide satisfactory
weatherproofi
ng. The interior and exterior trim can now be
fi tted.
Fig. 12
4.5.1.2 FITTING THE REAR FLUE (fi
g. 13) (rear
fl ue outlet
only)
Using the template provided, mark and drill a 125mm hole
for the passage of the fl ue pipe, see fi g 9. The hole should
be drilled LEVEL to ensure any condense fl uid that forms, is
allowed to drain back to the appliance. 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 bra-
cket has been secured to the wall, remove the blanking plate
from the rear of the boiler (Fig. 15).
NOTE The inner 60mm pipe of the rear fl
ue terminal mu
st be
cut by 12mm at the point indicated (fi g.13 pos. A).
Fig.13
Fig.15
Using the screws and washers provided, secure the appliance
onto the wall bracket and tighten with a suitable spanner.
Seal the fl ue assembly to the wall using cement or a suitable
alternative that will provide satisfactory weatherproofi ng. The
exterior wall trim can now be fi tted.
Fig.14
Fig. 11
Part No. Description Length
29450133 Rear fl ue terminal 825mm
Attach the rear fl ue terminal to the appliance (using the pre-
viously retained screws) and fi x the telescopic terminal to the
correct length (wall thickness) ensuring that the terminal will
protrude through the wall by the correct distance. At this point,
lift the appliance and carefully insert the terminal into and
through the wall, ensuring that the holes in the appliance back
frame are aligned with the studs on the wall bracket.
Seal the top fl ue outlet of the boiler with the blanking plate
provided with the rear fl ue kit (Fig. 14).
218
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 to the Vokèra condensing only
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.
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 kit for termination.
The vertical 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 ceiling and/or roof.
Depending on site conditions it may be preferable to install the
terminal assembly prior to fi tting the twin fl ue pipes.
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.
Push-fi
t the twin
fl ue pipes onto the concentric to twin converter
ensuring that the exhaust pipe connects to the exhaust con-
nection on the concentric to twin converter.
If necessary cut the plain ends (male) of the twin fl ue pipes to
allow connection to the concentric to twin converter.
NOTE
Before cutting twin fl ue pipes ensure allowances have been
made for connection onto the previous piece and onto the
concentric to twin converter. The last twin fl ue pipes must
be pushed 50mm onto the male spigots of the concentric to
twin converter.
You must ensure that the entire fl ue system is properly sup-
ported and connected.
Ensure that any horizontal sections of pipe have a fall
of between 1 & 3º towards the appliance (1º =17mm per
1000mm).
Fig. 20
Fig. 21
Fig.18
HORIZONTAL TERMINATION (fi g. 20)
The twin fl ue system must be converted to the dedicated con-
centric fl ue 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.
The air inlet pipe must always be level with or below, that of
the exhaust pipe.
Depending on site conditions it may be preferable to install the
terminal assembly prior to fi tting the twin fl ue pipes.
Mark and drill a level 130mm hole for the passage of the horizontal
fl ue terminal. Insert the terminal assembly into the fl ue hole.
Push-fi
t the twin
fl ue pipes onto the concentric to twin converter
box ensuring that the exhaust pipe connects to the exhaust
connection on the concentric to twin converter.
If necessary cut the plain ends (male) of the twin fl ue pipes to
allow connection to the concentric to twin converter.
NOTE
Before cutting twin fl ue pipes ensure allowances have been
made for connection onto the previous piece and onto the
concentric to twin converter. The last twin fl ue pipes must be
pushed 50mm onto the male spigots of the concentric to twin
converter.
INSTALLATION OF TWIN ADAPTOR KIT (fi g. 18 & 19)
Insert the exhaust connection manifold (A) onto the appliance
fl ue outlet.
Remove the blanking plate (located to the left of the appliance
fl ue outlet) and – using the same screws – install the air inlet
plate (B).
Using the hole in the exhaust connection manifold as a guide,
drill a 3mm hole in the appliance fl ue spigot and secure the
exhaust manifold connection to the fl ue spigot using the screw
provided (C).
Using the two holes in the air inlet plate as a guide, drill a
3mm hole in each and secure the air inlet pipe/bend using
the screws provided.
The twin fl ue pipes extensions and accessories can now be
installed by pushing together (the plain end of each extension
or bend should be pushed approximately 50mm into the female
socket of the previous piece).
BA
C
Fig. 19
1-deg = 17mm
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 tighten both nuts.
NOTE
It will be necessary to calculate the diameter of the gas supply
pipe to ensure the appliance has an adequate supply of gas.
4.6.2 FLOW & RETURN (fi g. 22)
The appliance is supplied with 22mm service valves for the
fl ow and return connections, connect a 22mm pipe to the inlet
of each valve and tighten both nuts.
NOTE
Depending on system requirements, it may necessary to in-
crease the size of the fl ow & return pipe work after the service
valve connections.
4.6.3 SAFETY VALVE (fi g. 22)
Connect the safety valve connection pipe to the safety valve
outlet. Connect a discharge pipe to the other end of the safety
valve connection pipe and tighten. The discharge pipe must
have a continuous fall away from the appliance to outside and
allow any water to drain away thereby eliminating the possibil-
ity of freezing. The discharge pipe must terminate in a position
where any water – possibly boiling – discharges safely without
causing damage or injury, but is still visible.
4.6.4 CONDENSE PIPE
During normal operation the boiler produces condense which
is collected in a trap located in the lower part of the boiler. A
fl exible pipe (condense outlet pipe) is connected to the outlet
of the trap. The fl exible pipe must be connected to a plastic
waste pipe only. The plastic waste pipe must have a minimum
of a 3º fall towards the drain. Any external run of pipe should
be insulated to prevent the risk of freezing.
4.6.5 CONNECTING THE CONDENSATE OUTLET
Gently pull the condense outlet pipe down from its location
inside the boiler until approximately 100mm protrudes from the
underside of the boiler, care should be taken to ensure that the
pipe connection to the trap remains secure. Connect a suitable
plastic (not copper) pipe (no less than 21mm diameter) to the
outlet pipe and ensure it discharges in accordance with local
building regulations or other rules in force.
Fig. 22
4.7 ELECTRICAL CONNECTIONS
The boiler is supplied with a 2-metre fl y-lead. This lead can be
used for connection to the electrical supply. Connect the fl y-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 EARTH connection.
Insert the supplied 3-AMP fuse into the fused isolator or fused plug.
Should the fl y-lead be unsuitable, refer to 4.7.3 for details on
how to connect the electrical supply directly to the boiler.
The electrical supply must be as specifi ed in section 3/3A. A
qualifi ed electrician should connect the appliance to the electrical
supply. If controls - external to the appliance - are required, a
competent person must undertake the design of any external
electrical circuits, please refer to section 8 for detailed instruc-
tions. ANY EXTERNAL CONTROL OR WIRING MUST BE
SERVED FROM THE SAME ISOLATOR AS THAT OF THE
APPLIANCE. The supply cable from the isolator to the appliance
must be 3-core fl exible sized 0.75mm to BS 6500 or equivalent.
Wiring to the appliance must be rated for operation in contact
with surfaces up to 90 ºC.
4.7.1 CASING REMOVAL (fi g. 23)
To gain internal access to the appliance you must fi rst remove
the casing, proceed as outlined below:
• locate and unscrew the 2-screws (A) that secure the outer
casing to the appliance
• lift the casing upward to disengage it from the top locating
hooks and then remove
• store the casing and screws safely until required. Re-fi t in
the reverse order
• remove the retaining screw below the control fascia and
gently lower it until it rests.
4.7.2 APPLIANCE TERMINAL BLOCK
The appliance terminal block is located on the rear of the control
fascia. Remove the casing as described in 4.7.1. Gently pull
the control panel forwards and down. Locate the terminal block
cover (fi g. 24).
NOTE
The appliance comes with a factory fi tted link (‘TA’) to allow
basic operation of the boiler via the mode selector switch. If it is
anticipated that external controls will be required please refer to
the wiring diagrams in section 8 for more detailed information.
4.7.3 CONNECTING THE MAINS (230V) INPUT
Unhook and remove the terminal block cover (230V). Pass the
cable through the cable anchorage point. Connect the supply
cable wires (LIVE, NEUTRAL, & EARTH) to their corresponding
terminals (L, N, & E) on the appliance – high voltage – terminal
block. When connecting the EARTH wire, ensure that it’s left
slightly longer that the others, this will prevent strain on the
EARTH wire should the cable become taut.
The securing screw on the cable anchorage should now be
tightened. This must be done before the terminal block cover
is re-fi tted in its position.
NOTE
It is the installer’s responsibility to ensure that the appliance is
properly Earthed. Vokèra Ltd. cannot be held responsible for any
damages or injuries caused as a result of incorrect Earth wiring.
Fig. 23
A
Fig. 24
Gas
cock
C/H fl ow
valve
C/H return
valve
Safety valve outlet
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 debris that are residual
from the installation of the system, consequently it is essential
that the system be fl ushed in accordance with the following
instructions.
5.3 INITIAL FILLING OF THE SYSTEM
Ensure both fl ow and return service valves are open, remove
appliance casing as described in 4.7.1, identify the automatic air
release valves (AAV) and loosen the dust cap/s by turning the
cap anti-clockwise one full turn. Ensure all manual air release
valves located on the heating system are closed. Connect the
fi
lling loop as shown in
fi g. 4, slowly proceed to fi ll the system
by fi
rstly opening the inlet valve connected to the
fl ow pipe, and
then turning the lever on the fi ll valve, to the open position. As
water enters the system the pressure gauge will begin to rise.
Once the gauge has reached 1 BAR close both valves and begin
venting all manual air release valves, starting at the lowest fi rst.
It may be necessary to go back and top-up the pressure until
the entire system has been fi lled. Inspect the system for water
tightness, rectifying any leaks.
5.4 INITIAL FLUSHING OF THE SYSTEM
The whole of the heating system must be fl ushed both cold
and hot as detailed in 5.8. Open all radiator or heating valves
and the appliance fl ow & return service valve. Drain the boiler
and system from the lowest points. Open the drain valve full
bore to remove any installation debris from the boiler prior to
lighting. Refi ll the boiler and heating system as described in 5.3.
5.5 PRE-OPERATION CHECKS
Before attempting the initial lighting of the appliance, the fol-
lowing checks must be carried out:
ensure all gas service valves from the meter to the appliance
are open and the supply pipe has been properly purged;
ensure the proper electrical checks have been carried out, (see
7.8) particularly continuity, polarity and resistance to earth;
ensure the 3 AMP fuse – supplied with the appliance – has
been fi tted;
ensure the system has been fi lled, vented and the pressure
set to 1 BAR;
ensure the
fl ue system has been fi tted properly and in ac-
cordance with the instructions;
ensure all appliance service valves are open.
5.6 INITIAL LIGHTING
Ensure 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 will now operate as described in 1.2.
Should the appliance fail to ignite, refer to 5.6 and/or section 7
(mode of operation, parameter setting & faultfi nding).
5.7 CHECKING GAS PRESSURE AND COMBUSTION
ANALYSIS
The appliance is factory set so should require no additional
adjustment once installed. However to satisfy the require-
ments of GSIUR 26/9 (I.S. 813 ROI), it will be necessary to
gas rate the appliance using the gas meter that serves the
appliance and carry out a combustion analysis check in accor-
dance with BS 7967 (UK) to ensure that correct combustion is
occurring, see fl ow 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, then it becomes necessary to carry out a combustion
analysis check to ensure that correct combustion is occurring.
If there are no means to carry out a combustion analysis
check, then it will not be possible to complete the commissio-
ning procedure.
Details on how to carry out the combustion analysis can be
found in section 7.
IMPORTANT
It’s imperative that a suffi cient dynamic – gas – pressure is
maintained at all times. Should the dynamic gas pressure fall
below an acceptable level, the appliance may malfunction or
sustain damage.
5.8 FINAL FLUSHING OF THE HEATING SYSTEM
The system shall be fl ushed in accordance with BS 7593 (I.S.
813 ROI). Should a cleanser be used, it must be suitable for
Aluminium heat exchangers. It shall be from a reputable manu-
facturer and shall be administered in strict accordance with the
manufacturers’ instructions and the DWTA code of practice.
NOTE
Chemicals used to cleanse the system and/or inhibit corrosion
must be pH neutral, i.e. they should ensure that the level of the
pH in the system water remains neutral. Premature failure of
certain components can occur if the level of pH in the system
water is out-with normal levels.
5.8.1 INHIBITORS
See Section 3 “General Requirements”.
5.9 SETTING THE FLOW OUTLET TEMPERATURE
The fl ow outlet temperature can be adjusted between 40 °C -
80 °C for standard CH system by using the Heating thermostat
knob (see fi g.1).
5.10 SETTING THE SYSTEM DESIGN PRESSURE
The design pressure should be a minimum of 0.5 BAR and a
maximum of 1.5 BAR. The actual reading should ideally be 1
BAR plus the equivalent height in metres (0.1 BAR = 1 metre)
to the highest point in the system above the base of the appli-
ance (up to the maximum of 1.5 BAR total).
N.B. The safety valve is set to lift at 3 BAR/30 metres/45 psig.
To lower the system pressure to the required value, drain off
some water from the appliance drain valve until the required
fi gure registers on the pressure gauge (see fi g. 1).
5.11 REGULATING THE CENTRAL HEATING SYSTEM
Fully open all radiator and circuit valves and run the appliance
for both heating and hot water until heated water is circulating.
If conditions are warm remove any thermostatic heads. Adjust
radiator return valves and any branch circuit return valves
until the individual return temperatures are correct and are
approximately equal.
5.12 FINAL CHECKS
• ENSURE ALL TEST NIPPLES ON THE APPLIANCE GAS
VALVE ARE TIGHT AND CHECKED FOR TIGHTNESS.
• ENSURE THE APPLIANCE FLUE SYSTEM IS FITTED
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, installation and com-
missioning in the Benchmark checklist at the back of this
book. It is important that the Benchmark checklist is correctly
completed and handed to the user. Failure to install and com-
mission the appliance to the manufacturers instructions will
invalidate the warranty.
5.13 INSTRUCTING THE USER
Hand over all documentation supplied with this appliance –
including these instructions – and explain the importance of
SECTION 5 - COMMISSIONING
Produkt Specifikationer
| Mærke: | Vokèra |
| Kategori: | Centralvarmekedel |
| Model: | Mynute i20 |
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