Installation
& Servicing
Instructions
THESE INSTRUCTIONS
TO BE RETAINED
BY USER
Contents
Design principles & operating sequence
1.1
1.2
1.3
1.4
Principle components
Mode of operation (at rest)
Mode of operation (heating or hot water request)
Safety devices
Technical data
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
2.10
2.11
2.12
Central heating
Gas pressure
Expansion vessel
Dimensions
Clearances
Connections
Electrical
Flue details
Efficiency
Adjusting operating parameters
Emissions
Pump duty
General requirements (UK)
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
3.10
3.11
Related documents
Location of appliance
Gas supply
Flue system
Air supply
Water circulation
Electrical supply
Mounting on a combustible surface
Timber framed buildings
Condensate disposal
Inhibitors
General requirements (EIRE)
3A.1 Related documents
3A.2 Location of appliance
3A.3 Gas supply
3A.4 Flue system
3A.5 Air supply
3A.6 Water circulation
3A.7 Electrical supply
3A.8 Mounting on a combustible surface
3A.9 Timber framed buildings
3A.10 Condensate disposal
3A.11 Inhibitors
3A.12 Declaration of conformity
Installation
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
4.10
Delivery
Contents
Unpacking
Preparation for mounting the appliance
Fitting the flue
Connecting the gas & water
Condensate outlet
Automatic air release valve
Electrical connections
Casing removal
Commissioning
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9
5.10
5.11
5.12
5.13
5.14
5.15
5.16
Gas supply installation
The heating system
Initial filling of the system
Initial flushing of the system
Pre-operation checks
Initial lighting
Final flushing of the heating system
Inhibitors
Appliance operating parameters
Parameters 3 & 4
Information mode
Setting the system design pressure
Regulating the central heating system
Checking dynamic gas pressure
Final checks
Instructing the user
Page
2
2
2
2
Page
3
3
3
3
3
3
3
3
3
3
3
4
Page
5
5
5
5
5
5
6
6
6
6
6
Page
8
8
8
8
8
8
9
9
9
9
9
9
Servicing
6.1
6.2
6.3
6.4
6.5
6.6
6.7
6.8
6.9
6.10
6.11
6.12
6.13
6.14
6.15
6.16
6.17
6.18
6.19
6.20
6.21
Page
General
Routine annual servicing
Replacement of components
Component removal procedure
Pump head
Safety valve
Automatic air release valve
Pressure gauge
NTC thermistors (temperature sensors)
Printed circuit board (PCB)
Gas valve
Fan
Burner
Electrode
Injector
Automatic by-pass assembly
Condense trap
Condense pressure switch
Combustion cover
Expansion vessel
Input & status PCB
18
18
18
18
18
18
18
18
19
19
19
19
19
20
20
20
20
20
20
21
21
Checks, adjustments and fault finding
Page
7.1
7.2
7.3
7.4
7.5
7.6
7.7
7.8
7.9
7.10
7.11
7.12
Checking appliance operation
Appliance mode of operation
Service paameters (5-42)
Adjusting the gas valve
1st digit status code
Temporary fault codes
Final fault codes
Diagnostic recall
Checking the expansion vessel
External faults (installation)
Electrical checks
Fault finding
Wiring diagrams
8.1
8.2
Installation of Vokera time clock
External controls important
Exploded diagrams
9.1
9.2
9.3
9.4
9.5
Table 1
Table 2
Table 3
Table 4
Table 5
22
22
22
22
24
24
24
24
24
25
25
25
Page
31
31
Page
36
37
38
39
40
Page
10
10
10
10
10
13
13
14
14
15
Page
16
16
16
16
16
16
16
16
16
16
16
17
17
17
17
17
L.P.G. instructions
10.1
10.2
10.3
10.4
10.5
Technical data
Related documents
Gas supply
Gas supply installation
Adjusting the gas valve
Page
41
41
41
41
41
INTRODUCTION
The Pinnacle range of boilers are central heating
condensing boiler, which – by design – incorporates full
sequence electronic ignition, circulating pump, expansion
vessel, safety valve, pressure gauge and automatic bypass.
Pinnacle is produced as a room sealed, category C1, C3,
C6 appliance, suitable for wall mounting applications
only. Pinnacle is provided with a fan powered flue outlet
with an annular co-axial combustion air intake that can be
rotated – horizontally – through 360 degrees for various
horizontal or vertical applications. Pinnacle can also be
used with the Vokera twin flue system.
This appliance is designed primarily for use with sealed
systems; however it can also be used on an open vented
system, provided that the necessary installation
requirements are met.
10
9
11
8
12
13
14
15
7
16
17
6
5
18
4
3
General layout (fig. 1A)
1
Auto by-pass
2
Safety valve
3
Condense trap
4
Pump
5
Return sensor (NTC2)
6
Gas valve
7
Silicone pressure tube
8
Flow sensor (NTC1)
9
Auto air vent (AAV)
10 Flue outlet & air intake
11 Flue gas analysis test point
12 Burner plate
13 Expansion vessel
14 Spark/Sensing Electrode
15 Heat exchanger
16 Pressure switch
17 Fan assembly
18 Electronic Control Board (PCB)
R
Heating return connection
F
Heating flow connection
G Gas connection
2
1
Fig. 1A
R
F
G
5
4
3
2
6
7
1
8
9
Control board (fig. 1B)
1
STEP button
2
PLUS button
3
MODE button
4
4 digits display
5
Status LED
6
RESET button
7
MINUS button
8
CH button/MEMO button
9
Time clock aperture
10 Pressure gauge
10
Fig. 1B
1
SECTION 1
1.1
DESIGN PRINCIPLES AND OPERATING SEQUENCE
PRINCIPLE COMPONENTS
A fully integrated electronic control board
featuring differential temperature control,
continuous air/gas modulation, anti-cycle
control, pump over-run, self-diagnostic fault
indicator, electronic ignition with flame
supervision & appliance frost protection
● Cast aluminium mono-block heat exchanger
● Low Nox burner with pre-mix
● Two-stage gas valve
● Pump
● Expansion vessel
● Pressure gauge
● Safety valve
●
●
1.2
1.3
1.4
2
MODE OF OPERATION (at rest)
When there is no demand for heating or hot water
and the appliance remains inactive for a period of
24 hours, the pump will be energised for a few
moments to prevent it from seizing. Should the
flow temperature sensor fall below 7 ºC the pump
will be energised. If the flow sensor temperature
falls to below 3 ºC the burner will be lit and the
appliance will operate at the minimum output until
the temperature of the flow sensor reaches 10 ºC,
whereupon the pump will continue to run in pump
over-run mode.
MODE OF OPERATON (heating or hot water
request)
When there is a request for heat via the time clock
and/or external controls, the pump will start and
the fan will be activated via the flow temperature
sensor. When the fan is sensed to be operating
correctly, the ignition sequence commences. The
speed of the fan and therefore the output of the
boiler is determined by the temperature of the
water sensed by the flow & return temperature
sensors, consequently a high temperature at the
flow sensor results in a lower fan speed. As the
water temperature increases, the temperature
sensors – located on the flow and return pipes of
the boiler – reduce the fan speed via the electronic
circuitry. Depending on the load, either the water
temperature will continue to rise until the set point
is achieved or the water temperature will fall
whereby fan speed will increase relative to the
output required. When the boiler has reached the
set point, the burner will switch off. The built-in
anti-cycle device prevents the burner from relighting for an adjustable period of time (factory
default is 3 minutes). When the temperature of
the flow sensor falls below the set-point, the
burner will re-light.
SAFETY DEVICES
When the appliance is in use, safe operation is
ensured by:
● a high limit thermostat that interrupts the
operation of the burner;
● a differential temperature protection circuit which
interrupts the burner if the temperature
●
●
differential is inverted;
a fan speed sensor that checks the correct
operation of the fan, thereby allowing safe
operation of the burner;
a condense pressure switch that will stop the
burner from operating should the condense
trap become blocked;
a safety valve which releases excess pressure
from the primary circuit.
1
NTC1
(flow
sensor)
4
Heat
exchanger
Expansion
vessel
NTC2
(return
sensor)
gas
Fig. 2
return
flow
SECTION 2
TECHNICAL DATA
2.1 Central heating
Heat input (gross)
Maximum heat output 60/80°C (return & flow temperature)
Maximum heat output 30/50°C (return & flow temperature)
Minimum heat output 60/80°C (return & flow temperature)
Minimum heat output 30/50°C (return & flow temperature)
Minimum working pressure
Maximum working pressure
Minimum flow rate
2.2 Gas pressure
Inlet pressure (G20)
Maximum gas rate
Minimum gas rate
Injector size
2.3 Expansion vessel
Capacity
Maximum system volume
Pre-charge pressure
2.4 Dimensions
Height
Width
Depth
Dry weight
2.5 Clearances
Sides
Top
Bottom
Front
2.6 Connections
Flow & return
Gas
Safety valve
2.7 Electrical
Voltage
Power consumption
Internal fuse
External fuse
2.8 Flue details
Maximum horizontal flue length (concentric)
Maximum vertical flue length (concentric)
Maximum twin flue length (horizontal or vertical)
2.9 Efficiency
SEDBUK rating
2.10 Adjustable operating parameters
PARAMETER
P. 4
Central heating flow temperature
P. 20
Pump over-run
P. 28
Anti-cycle delay
2.11 Emissions
NOx Min. output
NOx Max. output
CO Min. output
CO Max. output
CO2 Min. output
CO2 Max. output
CO/CO2 ratio
16
17.7 kW
15.4 kW
16.8 kW
4.4 kW
4.9 kW
0.5 bar
3 bar
350 litres per hour
26
29 kW
25.3 kW
26.8 kW
7.3 kW
8.1 kW
0.5 bar
3 bar
350 litres per hour
20.0 mbar
1.69 m3/h
0.49 m3/h
single injector with six 3.1 mm holes
20.0 mbar
2.76 m3/h
0.80 m3/h
single injector with six 3.8 mm holes
10 litres
91 litres (approx.)
1.0 bar
10 litres
91 litres (approx.)
1.0 bar
820 mm
450 mm
355 mm
53 kg
820 mm
450 mm
355 mm
53 kg
12 mm
12 mm
150 mm from casing or 25 mm above flue elbow (whichever is applicable)
150 mm
150 mm
600 mm
600 mm
22 mm compression
15 mm compression
15 mm compression
22 mm compression
15 mm compression
15 mm compression
230V/~ 50hz
130 W
F2A
3A
230V/~ 50hz
130 W
F2A
3A
10.0 metres
11.0 metres
39 m/39 m + terminal
6.45metres
7.45 metres
29 m/29 m + terminal
90.3% (Band “A”)
90.3% (Band “A”)
MINIMUM
20 °C
10 seconds
0 seconds
16
20 ppm
40 ppm
50 ppm
50 ppm
9.8%
9.8%
0.0005 to 1
MAXIMUM
90 °C
99 m
306 seconds
FACTORY SETTING
75 °C
10 m
91.8 seconds
26
15 ppm
30 ppm
50 ppm
50 ppm
9.8%
9.8%
0.0005 to 1
Ref. Condition 15 °C, 1013,25 mbar, dry gas
NOTE: L.P.G. data refer to section 10
3
7
6,5
6
)
5,5
5
4,5
(
PUMP DUTY
Fig. 3 shows the flow rate available – after allowing
for pressure loss through the appliance – for
system requirements. When using this graph
apply only the pressure loss of the system. The
graph is based on 20 ºC temperature differential.
Water pressure (mH20)
2.12
4
3,5
3
2,5
2
1,5
1
0,5
0
0
100
200
Fig. 3
SECTION 3
Key
A
B
C
D
E
F
G
H
I
J
K
L
M
N
P
Q
Fig. 4
4
300
400
500
600
700
800
900
1000
1100
1200
Litres Per Hour
GENERAL REQUIREMENTS (UK)
Location
Below an opening (window, air-brik, etc.)
Above an opening (window, air-brik, etc.)
To the side of an opening (window, air-brik, etc.)
Below gutter, drain-pipe, etc.
Below eaves
Below balcony, car-port roof, etc.
To the side of a soil/drain-pipe, etc.
From internal/external corner or boundary
Above ground, roof, or balcony level
From a surface or boundary facing the terminal
From a terminal facing a terminal
From an opening in the car-port into the building
Vertically from a terminal on the same wall
Horizontally from a terminal on the same wall
From a structure to the side of the vertical terminal
From the top of the vertical terminal to the roof flashing
Minimum distance
300 mm
300 mm
300 mm
75 mm
200 mm
200 mm
150 mm
300 mm
300 mm
600 mm
1200 mm
1200 mm
1500 mm
300 mm
300 mm
As determined by the fixed collar
of the vertical terminal
This appliance must be installed by a competent
person in accordance 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.
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. Installation pipes
must be fitted 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 connection must not be
used.
The installation must be tested for soundness in
accordance with BS 6891.
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 (fig. 4).
BS 5440 PART 1
FLUES
BS 5440 PART 2
FLUES & VENTILATION
BS 5449 PART 1
FORCED CIRCULATION HOT WATER SYSTEMS
BS 6798
INSTALLATION OF BOILERS OF RATED INPUT NOT EXCEEDING 60kW
BS 6891
LOW PRESSURE INSTALLATION PIPES
BS 7074 PART 1
APPLICATION, SELECTION AND INSTALLATION OF EXPANSION VESSELS AND
ANCILLARY EQUIPMENT FOR SEALED WATER SYSTEMS
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 provision of a safe and satisfactory flue 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, BS 6798 gives detailed guidance on
this aspect.
A compartment used to enclose the appliance
must be designed and constructed specifically
for this purpose. An existing compartment/cupboard may be utilised provided that it is modified
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.
In a cold and/or humid water, water vapour may
condense on leaving the terminal; the effect of
such pluming must be considered.
If installed less than 2 metres above a pavement
or platform to which people have access (including
balconies or flat roofs) the terminal must be
protected by a guard of durable material. The
guard must be fitted 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.
3.5
AIR SUPPLY
The following notes are intended for general
guidance only.
This appliance is a room sealed, fan-flued 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.
3.6
WATER CIRCULATION
Detailed recommendations are given in BS 5449
Part 1 and BS 6798. The following notes are for
general guidance only.
5
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 flows 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 floors, loft-space
and void areas.
3.6.2
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 accordance 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 filling of the system.
3.6.5
EXPANSION VESSEL
The appliance has an integral expansion vessel to
accommodate the increased volume of water when
the system is heated. It can accept up to 10 litres of
expansion from within the system, generally this is
sufficient, however if the system has an unusually
high water content, it may be necessary to provide
additional expansion capacity.
3.6.6
FILLING POINT (fig. 5)
A method for initial filling of the system and
replacing water lost during servicing etc. has
been provided. This method of filling must comply
with the current Water Supply (Water Fittings)
Regulations 1999 and Water Bylaws 2000
(Scotland). Fig. 5 shows a widely accepted method.
control valve
temporary
connection
flow/return
pipe
Fig. 5
6
Automatic
air-vent
Non-return
valve
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
3.6.7
Make-up vessel
or tank
double check
valve
Fig. 5A
Heating
return
3.6.8
FREQUENT FILLING
Frequent filling 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.
3.7
ELECTRICAL SUPPLY
The appliance is supplied for operation on 230V
@ 50Hz electrical 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 with a
contact separation of at least 3 mm. 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 fitted on a wall of combustible material, a sheet of fireproof material must
protect the wall.
3.9
TIMBER FRAMED BUILDINGS
If the appliance is to be fitted in a timber framed
building, it should be fitted in accordance with the
Institute of Gas Engineers publication (IGE/UP/
7) “Guide for Gas Installations in aTimber Frame
Buildings”.
3.10
CONDENSATE DISPOSAL
When choosing a location for the boiler,
consideration should be given to the disposal of
the condensate discharge into a suitable drain or
soil pipe. The condensate outlet pipe must be
connected to the drain in accordance with building
regulations or other rules in force.
3.11
INHIBITORS
Vokera recommend that a 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.
control valve
supply pipe
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 least 1 metre above the
highest point in the system and at least 5 metres
above the boiler (fig. 5A). The cold feed from the
make-up vessel or tank must be fitted 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.
Stopcock
5.0 metres minimum
3.6.1
*Fernox and Sentinel manufacture products that
have proved suitable for use with Vokera
appliances. Vokera Ltd. cannot comment on the
suitability of any other such product with our
appliances.
CH return
valve
Gas cock
CH flow
valve
Fig. 6
CONDENSATE
TRAP
RETURN
FLOW
GAS
Fig. 6A
7
SECTION 3A
GENERAL REQUIREMENTS (EIRE)
This appliance must be installed by a competent
person in accordance with and defined by, the
Standard Specification (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 provision of a safe and satisfactory flue 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 designed and constructed specifically
for this purpose. An existing compartment/
cupboard may be utilised provided that it is
modified to suit.
This appliance is not suitable for external
installation.
3A.3
8
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. Installation pipes
must be fitted 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 connection must not be
used. The installation must be tested for
soundness 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 appliance 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 may
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 flat roofs) the terminal must be
protected by a guard of durable material. The
guard must be fitted 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-flued 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
Specific 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 flows 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 floors, 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 filling of the system.
3A.6.5 EXPANSION VESSEL
The appliance has an integral expansion vessel
to accommodate the increased volume of water
when the system is heated. It can accept up to 10
litres of expansion from within the system,
generally this is sufficient, however if the system
has an unusually high water content, it may be
necessary to provide additional expansion
capacity.
3A.6.6 FILLING POINT
A method for initial filling of the system and
replacing water lost during servicing etc. must be
provided. A typical arrangement is shown in
figure 5. You should ensure this method of filling
complies 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 least 1 metre above the
highest point in the system and at least 5 metres
above the boiler (fig. 5).
The cold feed from the make-up vessel or tank
must be fitted 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.
Buildings’ gives specific advice on this type of
installation.
3A.10 CONDENSATE DISPOSAL
When choosing a location for the boiler,
consideration should be given to the disposal of
the condensate discharge into a suitable drain
or soil pipe. The condensate outlet pipe must be
connected to the drain in accordance with
building regulations or other rules in force.
3A.11 INHIBITORS
Vokera recommend that a 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.
*Fernox and Sentinel manufacture products that
have proved suitable for use with Vokera
appliances. Vokera Ltd. cannot comment on the
suitability of any other such product with our
appliances.
3A.12 DECLARATION OF CONFORMITY
A Declaration of Conformity (as defined 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.
3A.6.8 FREQUENT FILLING
Frequent filling 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 electrical 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 with a
contact separation of at least 3 mm. 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 fitted on a wall of
combustible material, a sheet of fireproof material
must protect the wall.
3A.9
TIMBER FRAMED BUILDINGS
If the appliance is to be fitted in a timber framed
building, it should be fitted 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
9
SECTION 4
4.1
4.2
4.3
4.4
4.5
4.5.1
10
INSTALLATION
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 floor with the writing the
correct way up.
CONTENTS
Contained within the carton is:
● the boiler;
● the wall bracket;
● template;
● an accessories pack containing appliance
service connections and washers;
● the instruction pack containing the installation
& servicing instructions, user instructions,
Benchmark logbook, guarantee registration
card and a 3-amp fuse.
Reduction for additional bends
Bend
45° bend
Reduction in maximum flue length for each bend
0.5 metre
90° bend
1.0 metre
Horizontal flue terminals and accessories
Part No.
Description
0225720 Horizontal flue kit for use with 1000 mm
add. bends & extensions
0225755 Telescopic extension
350 mm-500 mm
0225740 0.5 m extension
500 mm
0225745 1.0 m extension
1000 mm
0225750 2.0 m extension
2000 mm
0225730 45° bend (pair)
N/A
0225735 90° bend
N/A
0225760 Wall bracket (5)
N/A
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.
PREPARATION FOR MOUNTING THE
APPLIANCE
The appliance should be mounted on a smooth,
vertical, non-combustible surface, 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
(fig. 6A) and flue-hole (if applicable).
FITTING THE FLUE
The top flue outlet permits both horizontal and
vertical flue applications to be considered,
alternatively, the Vokera twin flue system can be
utilised if longer flue runs are required.
CONCENTRIC HORIZONTAL FLUE
(For concentric vertical flue, see section 4.5.2).
(For twin flue applications, see section 4.5.3).
The appliance flue outlet elbow can be rotated
through 360º on its vertical axis. In addition the
flue may be extended from the outlet elbow in the
horizontal plane (see section 2.9). A reduction
must also be made to the maximum length (see
table below) when additional bends are used.
Min-Max length
Push-fit
connection
Horizontal
terminal or
extension
Boiler top
adaptor
Boiler
Fig. 7
Using the template provided (fig. 6A), mark and
drill a 125 mm hole for the passage of the flue
pipe. The hole should have a 1º rise from the
boiler to outside.
The fixing holes for the wall-mounting bracket
should now be drilled and plugged, an appropriate
type and quantity of fixing should be used to
ensure that the bracket is mounted securely.
Once the bracket has been secured to the wall,
mount the appliance onto the bracket.
FITTING THE HORIZONTAL FLUE KIT
Using a twisting motion, connect the boiler top
adaptor – supplied with the flue terminal kit – to
the appliance flue outlet ensuring the male spigot
of the adaptor is pushed fully into the flue outlet
spigot of the boiler (fig. 7). Carefully measure the
distance from the centre of the appliance flue
outlet to the edge of the finished outside wall
(dimension X). Add 45 mm to dimension X to
give you Dimension Y (fig 7A). Measure
dimension Y from the terminal end of the
concentric flue pipe and cut off the excess. Pass
the concentric flue pipe through the previously
drilled hole. Fit the flue bend to the boiler top
NOTE
When cutting an extension to the required length,
you must ensure that the excess is cut from the
plain end of the extension (fig. 7 & 7B). Remove
any burrs, and check that all seals are located
properly.
You must ensure that the entire flue system is
properly supported and connected.
Seal the flue assembly to the wall using cement
or a suitable alternative that will provide
satisfactory weatherproofing. The interior and
exterior trim can now be fitted.
adaptor and insert the concentric flue pipe into
the flue bend ensuring the correct seal is made.
4.5.2
Fig. 7A
“Y” = “X” + 45 mm
Using the clamp, gasket and screws supplied,
secure the flue bend to the appliance flue spigot.
NOTE
You must ensure that the entire flue system is
properly supported and connected.
Seal the flue assembly to the wall using cement
or a suitable alternative that will provide
satisfactory weatherproofing. The interior and
exterior trim can now be fitted.
4.5.1.1 EXTENDING THE FLUE
Connect the bend – supplied with the terminal kit
– to the top of the boiler using the boiler top
adapter and clamp (supplied, fig. 7). The additional
bends & extensions have push-fit connections,
care should be taken to ensure that the correct
seal is made when assembling the flue system.
Connect the required number of flue extensions
or bends (up to the maximum equivalent flue
length) to the flue terminal (fig. 7 & 7B).
CONCENTRIC VERTICAL FLUE
The vertical flue terminal can be connected directly
to the appliance flue outlet. Alternatively, an
extension or bend can be connected to the
appliance flue outlet if desired (see section 2.9),
however if additional bends are fitted, a reduction
must be made to the maximum flue length (see
table below).
Reduction for bends
Bend
Reduction in maximum flue length for each bend
45° bend
0.5 metre
90° bend
1.0 metre
Vertical flue terminal and accessories
Part No.
Description
Min-Max length
0225725
Vertical flue terminal
1000 mm
0225770
Pitched roof flashing plate
N/A
0225765
Flat roof flashing plate
N/A
0225755
350-500 telescopic extension
350 mm-500 mm
0225740
500 mm extension
500 mm
0225745
1000 mm extension
1000 mm
0225750
2000 mm extension
2000 mm
0225730
45° bend (pair)
N/A
0225735
90° bend
N/A
0225760
Wall bracket (4)
N/A
300 mm minimum
Push-fit connection
520 mm
Extension pipe
Plain end
Boiler top adaptor
Fig. 7B
Boiler
Fig. 8
170mm
11
Using the dimensions given in fig. 8 as a reference,
mark and cut a 105 mm hole in the ceiling and/or
roof.
IMPORTANT
You must ensure that the terminal is at least 300
mm from any structure or surface (fig. 8).
The vertical flue 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. Ensure that any horizontal
sections of the flue system have a 1º fall back to
the boiler (17 mm per 1000 mm).
Fit the appropriate flashing plate to the roof and
insert the vertical flue terminal through the flashing
plate from the outside, ensuring that the collar on
the flue terminal fits over the flashing.
The fixing holes for the wall-mounting bracket
should now be drilled and plugged, an appropriate
type and quantity of fixing should be used to
ensure that the bracket is mounted securely.
Once the bracket has been secured to the wall,
mount the appliance onto the bracket.
Secure the vertical flue terminal or intermediate
flue component, to the appliance using the boiler
top adaptor and 100 mm clamp supplied.
NOTE
When cutting an extension to the required length,
you must ensure that the excess is cut from the
plain end of the extension. Remove any burrs,
and check that any seals are located properly.
4.5.3
TWIN FLUE SYSTEM
The Vokera twin flue system enables greater flue
distances to be achieved (see section 2.9) than
that of the standard concentric flue system. It can
be used for horizontal or vertical applications,
however the twin flue system must be converted
to the dedicated concentric flue kit for termination.
It is essential that the installation of the twin flue
system be carried out in strict accordance with
these instructions.
GUIDANCE NOTES ON TWIN FLUE
INSTALLATION
● The flue must have a fall back of 1º back to the
appliance to allow any condensate that forms
in the flue system to drain. Consideration must
also be given to the fact that there is the
possibility of a small amount of condensate
dripping from the terminal.
● Ensure that the entire flue system is adequately
supported, use at least one bracket for each
extension.
● Extreme care must be taken to ensure that no
debris is allowed to enter the flue system at
any time.
● As the exhaust outlet pipe can reach very high
temperatures it must be protected to prevent
persons touching the hot surface.
Reduction for bends
Bend
Reduction in maximum flue length for each bend
45° bend
1.0 metre
90° bend
1.0 metre
12
Twin flue accessories
Part No.
Description
Length
0225805
Horizontal flue terminal
1000 mm
0225810
Vertical flue terminal
1000 mm
359
Twin adapter kit
N/A
0225770
Pitched roof flashing plate
N/A
0225765
Flat roof flashing plate
N/A
0225815
Condensate drain kit
N/A
0225820
0.25 m extension (pair)
250 mm
0225825
0.5 m extension (pair)
500 mm
0225830
1.0 m extension (pair)
1000 mm
0225835
2.0 m extension (pair)
2000 mm
0225840
45° bend (pair)
N/A
0225845
90° bend (pair)
N/A
0225850
Twin bracket (5)
N/A
0225855
Single bracket (5)
N/A
MOUNTING THE BOILER
The fixing holes for the wall-mounting bracket
should now be drilled and plugged, an
appropriate type and quantity of fixing should be
used to ensure that the bracket is mounted
securely. Once the bracket has been secured to
the wall, mount the appliance onto the bracket.
4.5.3.1 INSTALLATION OF TWIN ADAPTOR KIT (fig. 9)
● Insert the exhaust connection manifold (B) onto
the appliance flue outlet and secure to the flue
spigot using the screws provided.
● Remove the blanking plates (located to the left
of the appliance flue outlet) and – using the
same screws – install the air baffle (A).
B
A
Fig. 9
4.5.3.2 HORIZONTAL TERMINATION (fig. 10)
The twin flue system must be converted to the
dedicated concentric flue kit for termination.
● The horizontal terminal is supplied with a builtin converter box and cannot be shortened.
● A 130 mm hole is required for the passage of
the concentric terminal through the wall.
Depending on site conditions it may be preferable
to install the terminal assembly prior to fitting the
twin flue pipes.
Mark and drill a 130 mm hole for the passage of
the horizontal flue terminal, ensuring that there is
a 1° fall back to the boiler (17 mm per 1000 mm).
Insert the terminal assembly into the flue hole.
Push-fit the twin flue 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
flue pipes to allow connection to the concentric
to twin converter.
NOTE
Before cutting twin flue pipes ensure allowances
have been made for connection onto the previous
piece and onto the concentric to twin converter.
The last twin flue pipes must be pushed 50 mm
onto the male spigots of the concentric to twin
converter.
●
The convertor box on the vertical terminal will
have to be temporarily removed when inserting
the terminal through the flashing.
convertor box
convertor box
Fig. 10
NOTE
You must ensure that the entire flue system is
properly supported and connected.
When cutting an extension to the required length,
you should ensure that the excess is cut from
the plain end of the extension. Remove any burrs
and check that both seals are located properly.
Seal the flue terminal assembly to the wall using
cement or a suitable alternative that will provide
satisfactory weatherproofing. The interior and
exterior trim can now be fitted.
4.5.3.3 VERTICAL TERMINATION (fig. 11)
The twin flue system must be converted to the
dedicated concentric flue kit for termination.
● The vertical terminal is supplied with a built-in
converter box and cannot be shortened.
● A 130 mm 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 fitting the
twin flue pipes.
Fit the appropriate flashing plate to the roof and
insert the vertical flue terminal through the
flashing plate from the outside, ensuring that the
collar on the flue terminal fits over the flashing.
Push-fit the twin flue pipes onto the concentric to
twin converter 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
flue pipes to allow connection to the concentric
to twin converter.
NOTE
● Before cutting twin flue pipes ensure
allowances have been made for connection
onto the previous piece and onto the concentric
to twin converter. The last twin flue pipes must
be pushed 50 mm onto the male spigots of the
concentric to twin converter.
● You must ensure that the entire flue system is
properly supported and connected.
● Ensure that any horizontal sections of pipe
have a 1° fall towards the appliance (17 mm
per 1000mm).
Fig. 11
4.6
CONNECTING THE GAS AND WATER
Care must be taken to ensure that the appliance
and/or its ancillary components are protected
from the use of a blowtorch or similar soldering
equipment. The appliance is supplied with
accessories that include sealing washers and
service valves and connections.
When connecting pipe work to the valves, tighten
the compression end first then insert the sealing
washers before tightening the valve to the
appliance.
NOTE
It will be necessary to hold the valve with one
spanner whilst tightening with another.
4.6.1
GAS (fig. 6 & 6A)
The appliance is supplied with a 15 mm service
valve, connect the supply pipe to the inlet of the
valve and tighten the connecting nut.
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 (fig. 6 & 6A)
The appliance is supplied with 22 mm service
valves for the flow and return connections, connect
a 22 mm pipe to the inlet of each valve and tighten
both nuts.
4.6.3
SAFETY VALVE
Connect the safety valve discharge pipe to the
safety valve outlet 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 possibility 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.
4.7
CONDENSATE OUTLET (fig. 6A)
During normal operation the boiler produces
condensate which is collected in a trap located in
the lower part of the boiler. A flexible pipe
13
(condensate outlet pipe) is connected to the
outlet of the trap. The flexible 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.
CONNECTING THE CONDENSATE OUTLET
Gently pull the condensate outlet pipe down from
its location inside the boiler until approximately
250 mm protrudes from the underside of the
boiler. Connect a suitable plastic (not copper)
pipe (no less than 20 mm diameter) to the outlet
pipe and ensure it discharges in accordance with
building regulations or other rules in force.
4.8
screws
Fig. 13A
AUTOMATIC AIR RELEASE VALVE
Mount the AAV as shown in fig. 12.
Fig. 13B
Fig. 12
4.9
ELECTRICAL CONNECTIONS
The electrical supply must be as specified in
section 3. A qualified electrician should connect
the electrical supply to the appliance. 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 instructions.
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 flexible sized 0.75 mm to BS
6500. Wiring to the appliance must be rated for
operation in contact with surfaces up to 90 ºC.
4.9.1
ELECTRICAL INPUT BOARD
The appliance electrical input board is located
behind the control fascia.
To gain access to the appliance electrical
connections you must proceed as follows:
● push to release front door panel and lower to
reveal controls. Loosen the 2 captive screws
securing the front control panel to the lower part
of the casing and lower to reveal inside of the
boiler (fig. 13A);
● remove the 4 screws securing the input board
cover (fig. 13B).
NOTE
The appliance comes with a factory fitted link to
allow basic operation of the boiler via the keypad.
If it is anticipated that external controls will be
required please refer to the wiring diagrams in
section 8 for more detailed information.
14
4.9.2 CONNECTING THE MAINS (230V) INPUT
(fig. 14)
Remove the electrical input board cover as
described in section 4.9.1. Pass the cable through
the cable anchorage. Connect the supply cable
wires (earth, live and neutral) to their
corresponding terminals on the electrical input
board. Ensure that the EARTH wire is left slightly
longer that the others, this will prevent strain on
the EARTH wire should the cable become taut.
Do not remove the link wire (between terminals 2
& 3 on plug M7) unless additional external controls
are to be fitted (see section 8). Re-fit the electrical
input board cover.
The securing screw on the cable anchorage
should now be tightened. This must be done
before the control fascia is re-fitted in the upright
position.
Fig. 14
4.10
CASING REMOVAL
Lower the front control panel as described in
section 4.9.1.
● Locate and remove the 2 screws that secure
the controls fascia to the appliance casing (fig.
13A)
● locate and remove the 2 screws that secure the
casing to the back frame of the boiler (fig. 15)
● gently pull one side of the casing then the other
to disengage it from the retaining clips
● lift the casing upward to disengage it from the
top locating hooks and then remove
● store the casing and screws safely until required.
Re-fit in the reverse order.
screw
screw
Fig. 15
15
SECTION 5
COMMISSIONING
5.1
GAS SUPPLY INSTALLATION
Inspect the entire installation including the gas
meter, test for soundness and purge.
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 flushed in accordance with the following
instructions.
5.3
INITIAL FILLING OF THE SYSTEM
5.3.1. Ensure both flow and return service valves are
open, identify the automatic air release valve (fig.
12) and loosen the dust cap by turning the cap
anti-clockwise one full turn.
5.7
FINAL FLUSHING OF THE HEATING SYSTEM
The system shall be flushed in accordance with
BS 7593. If a cleanser is to be used, it shall be
from a reputable manufacturer* and shall be
administered in strict accordance with the
manufacturers instructions.
*Both Sentinel and Fernox manufacture products
that have proved suitable for use with Vokera
appliances. Vokera Ltd. cannot comment on the
suitability of any other such product with our
appliances.
5.8
INHIBITORS
See Section 3 “General Requirements”.
5.9
APPLIANCE OPERATING PARAMETERS
The appliance is supplied with pre-set operating
parameters. Parameters 3 & 4 can be adjusted at
any time, however the remaining parameters (5 –
42) can only be accessed after entering the
relevant service code, and should only be adjusted
by qualified service personnel.
5.10
PARAMETERS 3 & 4
Parameters 3 & 4, are used to alter or adjust the
operating mode and flow temperature. Use the
following table and procedure to check or adjust
the relevant parameters:
5.3.2. IMPORTANT, THERE ARE NO MANUAL AIR
RELEASE VALVES LOCATED ON THE
APPLIANCE. Ensure all manual air release valves
located on the heating system are closed.
5.3.3. Using the method of filling as described in fig. 5,
slowly proceed to fill the system. As water enters
the system the pressure gauge will begin to rise.
Once the gauge has reached 1 bar close the
filling valve and begin venting all manual air
release valves, starting at the lowest first. It may
be necessary to go back and top-up the pressure
until the entire system has been filled. Inspect the
system for water soundness, rectifying any leaks.
5.4
5.5
5.6
16
Parameter
Description
Range
1
N/A
N/A
INITIAL FLUSHING OF THE SYSTEM
The whole of the heating system must be flushed
both cold and hot as detailed in section 5.8. Open
all radiator or heating valves and the appliance
flow & return service valves. 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. Refill the boiler
and heating system as described in section 5.3.
N/A
N/A
3
Heating mode
00 = off
01 = on
03 = off
(pump on continuously)
04 = on
(pump on continuously)
4
Heating outlet temperature
20 °C - 90 °C
●
PRE-OPERATION CHECKS
Before attempting the initial lighting of the appliance,
the following 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 section 7.7) particularly
continuity, polarity, and resistance to earth;
● ensure the 3 amp fuse – supplied with the
appliance – has been fitted;
● ensure the system has been filled, vented, and
the pressure set to 1 bar;
● ensure the flue system has been fitted properly
and in accordance with the instructions;
● ensure all appliance service valves are open.
INITIAL LIGHTING
Ensure the electrical supply to the appliance is
switched on. Switch the time clock or programmer
to an ‘on’ position and ensure all external controls
are also calling for heat.
The appliance will operate in the central heating
mode as described in section 1.3. Should the
appliance fail to ignite, refer to section 5.6 and/or
section 7 (faultfinding).
2
Press the mode
in the display.
button until “PARA” appears
S button until the appropriate
parameter is shown in the left side of the
display.
●
Press the
●
Use the + or
-
buttons to adjust the value
of the paramater as shown in the right side of
the display.
●
●
Press the M button to store the new setting.
reset
Press the
stand-by mode.
button to return to the
IMPORTANT
Under no circumstances should any parameters
- other than those shown above - be changed or
adjusted by non competent personnel.
5.11
INFORMATION MODE
The appliance keypad can be used to display
certain information on the working status of the
boiler. Information such as flow & return
temperature, and temperature rise can be viewed
using the following table and procedure:
Step number
1
2
3
4
5
6
7
Information displayed
Temperature at flow sensor
Temperature at return sensor
Unused
Unused
Unused
Required temperature (as set at parameter 4)
Temperature rise of flow sensor (measured in °C per
second)
Temperature rise of return sensor (measured in °C
per second)
Unused
Unused
8
9
A
●
Press the mode
in the display.
Press the +
Press the S button until the appropriate step
●
number is shown in the left side of the display.
The measured value of each step is shown on
the right side of the display.
Press the mode
button until “Stby” appears
in the display to return to the stand-by mode.
SETTING THE SYSTEM DESIGN PRESSURE
The design pressure should be a minimum of 1
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 appliance (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, pull lever on head of safety valve to release
water until the required figure registers on the
pressure gauge (fig. 1).
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.
5.15
5.13
5.14
CHECKING DYNAMIC GAS PRESSURE
Isolate the appliance from the electrical supply
and remove the appliance casing as described in
section 4.10. Unclip and remove the front air
chamber cover.
Attach a suitable manometer to the inlet test
nipple of the gas valve.
Restore the electrical supply to the boiler and
generate a request for central heating via the
room thermostat and/or timer.
Press the
mode
and +
buttons at the same
FINAL CHECKS
ENSURE ALL TEST NIPPLES ON THE
APPLIANCE GAS VALVE ARE TIGHT AND
HAVE BEEN CHECKED FOR SOUNDNESS.
● ENSURE THE APPLIANCE FLUE SYSTEM IS
FITTED CORRECTLY AND IS PROPERLY
SECURED.
● ENSURE ALL PIPE WORK IS RE-CHECKED
FOR SOUNDNESS.
● RE-FIT APPLIANCE CASING.
● COMPLETE APPLIANCE LOGBOOK.
Complete details of the boiler, controls, installation
and commissioning in the logbook supplied with
the boiler. This is an important document, which
must be correctly completed and handed to the
user. Failure to install and commission the
appliance to the manufacturers instructions may
invalidate the warranty.
●
●
5.12
-
time to return to the normal operating mode.
Isolate the appliance from the electrical supply,
remove the manometer from the inlet test nipple,
tighten the test nipple screw, and check for
soundness.
Refit the air chamber cover and appliance casing
in the reverse order.
button until “INFO” appears
●
and
5.16
INSTRUCTING THE USER
Hand over all documentation supplied with this
appliance – including these instructions – and
explain the importance of 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
its associated controls correctly.
Show the user the location of the filling valve and
how to top-up the system pressure correctly and
show the location of all manual air release points.
Explain to the user how to turn off the appliance
for both long and short periods and advise on the
necessary precautions to prevent frost damage.
buttons at the same
time, the boiler will now run at full power for 15
minutes.
The dynamic gas pressure will now be shown on
the manometer, and should be 20 mbar +/- 1 mbar.
If the dynamic gas pressure is out-with the
tolerance range, you should contact the gas
supplier for advice.
17
SECTION 6
6.1
6.2
SERVICING INSTRUCTIONS
GENERAL
To ensure the continued safe and efficient
operation of the appliance, it is recommended
that it is checked and serviced at regular intervals.
The frequency of servicing will depend upon the
particular installation conditions, but in general,
once per year should be adequate.
It is the law that any servicing work is carried out
by competent person such as a Vokera engineer,
an approved service agent, British Gas or other
CORGI registered personnel.
The following instructions apply to the appliance
and its controls, but it should be remembered that
the central heating system will also require
attention from time to time.
ROUTINE ANNUAL 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 deterioration should be identified
and rectified without delay.
● Thoroughly inspect the appliance for signs of
damage or deterioration especially the flue
system and the electrical apparatus.
● Check and adjust – if necessary – the system
design pressure (see section 5.12).
● Ensure both the burner and heat exchanger are
clean and free from any debris or obstruction.
● Carry out an analysis of the flue gases (see
section 7.4), and visually check the condition of
the entire flue assembly.
● Compare the results with the appliance design
specification. Any deterioration in performance
must be identified and rectified without delay.
● Inspect all joints for signs of leakage and repair
if necessary.
● Refer to the commissioning section and/or
replacement of parts section for detailed
instruction if required.
ALWAYS TEST FOR GAS SOUNDNESS IF
ANY GAS CARRYING COMPONENTS HAVE
BEEN REMOVED OR DISTURBED.
6.5
PUMP HEAD (fig. 1)
Carry out component removal procedure as
described in section 6.4.
Using a 4 mm Allen key or ‘T’ bar, unscrew and
remove the four Allen screws that hold the pump
in position, pull firmly on the pump head to release
it from the base. Disconnect the electrical leads.
Replace in the reverse order.
6.6
SAFETY VALVE (fig. 16)
Carry out component removal procedure as
described in section 6.4.
Disconnect the outlet pipe from the safety valve.
Remove safety valve locking screw from the
underside of the appliance manifold. Pull safety
valve free from manifold.
Replace in the reverse order.
●
6.3
6.4
18
Safety valve
Fig. 16
6.7
AUTOMATIC AIR RELEASE VALVE (fig. 12)
Carry out component removal procedure as described in section 6.4. Using a suitable pair of
pump pliers, unscrew the AAV from its position.
Replace in the reverse order.
6.8
PRESSURE GAUGE (fig. 17)
Carry out component removal procedure as described in section 6.4.
Remove pressure gauge locking screw, located
on manifold, and withdraw the pressure gauge
pipe, locate the spring tabs on the pressure
gauge body, push and hold tabs in, to enable
extraction of the gauge from its location.
Replace in the reverse order.
REPLACEMENT OF COMPONENTS
Although it is anticipated that this appliance will
give years of reliable, trouble free service, the life
span of components will be determined by factors
such as operating conditions and usage. Should
the appliance develop a fault, the fault finding
section will assist in determining which component
is malfunctioning. Always use genuine Vokera
spare parts.
COMPONENT REMOVAL PROCEDURE
To remove a component, access to the interior of
the appliance is essential. Isolate the appliance
from the electrical supply and remove the fuse.
And when necessary, close all service valves on
the appliance, remove the appliance casing as
described in section 4.10. Drain the water content
from the appliance via the safety valve. Ensure
some water absorbent cloths are available to
catch any residual water that may drip from the
appliance or removed component. Undertake a
complete commissioning check as detailed in
section 5, after replacing any component.
Locking screw
Manifold
Pressure gauge
connection
Fig. 17
Locking screw
6.9
NTC THERMISTORS (temperature sensors)
Carry out component removal procedure as described in section 6.4.
Flow & return sensors (fig. 1 & 18)
Pull back protective boot and remove the 2 spade
connectors. Slacken and remove the 2 securing
screws.
Replace in the reverse order.
Screw
Fig. 20
6.12
Fig. 18
6.10
FAN (fig. 20A)
Carry out component removal procedure as
described in section 6.4.
Unclip and remove the air chamber cover.
Disconnect the electrical plug from the fan. Locate
and remove the 4 bolts that secure the fan to the
pre-mix manifold. Replace in the reverse order.
Screw
PRINTED CIRCUIT BOARD (PCB) (fig. 19)
Carry out component removal procedure as described in section 6.4.
● Locate and remove the 2 screws that secure
the PCB housing bracket to the underside of
the air chamber.
● Remove the 4 screws that secure the housing
cover to the housing.
● After carefully taking note of all wiring
connections, disconnect all wiring from the
PCB.
● Locate and remove the 3 screws that secure
the PCB to the housing.
Replace in the reverse order.
Fig. 20A
6.13
BURNER (fig. 21 & 23)
Carry out component removal procedure as described in section 6.4.
Unclip and remove the air chamber cover. Locate
and remove the 8 nuts (10 mm) securing the premix manifold/burner assembly.Disconnect the
gas valve outlet pipe at its connection to the premix manifold. Disconnect the silicone pipe from
the pre-mix manifold. Gently pull away the fan/
pre-mix manifold assembly from the heat
exchanger. Remove the earth wire from the burner
earth tab and gently lift the burner from its location.
Replace in the reverse order. Please note, ensure
all seals are in good condition, taking care to
ensure they are replaced correctly.
Fig. 19
6.11
GAS VALVE (fig. 20)
Carry out component removal procedure as
described in section 6.4.
The gas valve must be changed as complete unit.
Unclip and remove the air chamber cover.
Disconnect the electrical plug from the gas valve.
Disconnect silicone tube from gas valve regulator.
Slacken and unscrew gas valve inlet and outlet
connections. Please note, the sealing washers
must be discarded and replaced with new sealing
washers. The gas valve can now be removed.
Replace in the reverse order. Refer to section
seven for detailed instructions on how to set-up
the gas valve. WARNING, A GAS SOUNDNESS
CHECK MUST BE CARRIED OUT.
Securing nuts
Spark
electrode
Gas valve outlet
connection
Fig. 21
19
6.14
ELECTRODE (fig. 21 & 22)
Carry out component removal procedure as described in section 6.4.
Unclip and remove the air chamber cover.
Remove the electrode lead. Remove the 2 screws
that secure the electrode to the combustion cover,
and gently withdraw the electrode.
Replace in the reverse order ensuring that the
electrode seal is in good condition, and that the
combustion cover insulation board is undisturbed.
Inlet connection
Pressure
switch connection
Outlet connection
All dimensions in mm.
Fig. 24
6.18
CONDENSE PRESSURE SWITCH (fig. 25)
Carry out component removal procedure as
described in section 6.4.
Unclip and remove the air chamber cover.
Disconnect the electrical wiring and pressure
tube from the pressure switch. Remove the
retaining screws and/or clip.
Replace in the reverse order.
Fig. 22
6.15
INJECTOR (fig. 23)
Carry out component removal procedure as described in section 6.4.
Unclip and remove the air chamber cover.
Remove the fan as detailed in section 6.12 using
a 17 mm socket, locate and unscrew the injector.
Replace in the reverse order.
Burner plate
Condense
pressure switch
Fig. 25
6.19
Injector
Fan
Fig. 23
6.16
AUTOMATIC BY-PASS ASSEMBLY (fig. 27)
Carry out component removal procedure as described in 6.4.
Disconnect and remove the flow pipe and
expansion pipe from the manifold assembly. Using
a suitably shaped screwdriver, lever out the auto
6.17
CONDENSE TRAP (see fig. 24)
Carry out component removal procedure as
described in section 6.4. Disconnect the pressure
switch tube from the condense trap. Disconnect
both the inlet and outlet connections from the
trap. Carefully withdraw the trap, keeping it upright
to avoid spillage. Replace in the reverse order.
Fig. 26
20
COMBUSTION COVER (fig. 26)
Carry out component removal procedure as
described in section 6.4.
Unclip and remove the air chamber cover.
Remove the gas valve as described in section
6.11. Remove the condense pressure switch as
described in section 6.20. Disconnect the electrical
connection from the fan, disconnect the spark
electrode lead and earth wire from the spark
electrode. Locate and remove the twelve 10 mm
securing nuts. Carefully remove the combustion
cover from the locating studs. Remove the
combustion cover from the air chamber,
withdrawing it at a slight angle from the right hand
8
7
1
6
5
2
1
2
3
4
5
6
7
8
Hydraulic manifold
Safety valve locking screw
Pressure gauge locking screw
Safety valve
Expansion pipe
Bleed/drain nipple
Automatic bypass
Expansion pipe locking screw
3
4
Fig. 27
side. Replace in the reverse order, ensuring that
all seals and insulation panels are undamaged
and in good condition.
6.20
screws
EXPANSION VESSEL (fig. 1)
Due to the compact design of this appliance,
removal and/or replacement of the expansion
vessel may require the appliance to be removed
from the wall, if this is deemed impractical, an
external expansion vessel may be fitted to the
return pipe as close to the appliance as possible.
rear
frame
6.20.1 EXPANSION VESSEL (removal, fig. 28)
Carry out component removal procedure as
described in section 6.4.
Disconnect the flue from the appliance.
Disconnect the expansion vessel from the
expansion pipe.
Remove the flow sensor as shown in section 6.9.
Locate and remove the 4 screws.
Remove the rear frame.
Slacken the flow pipe nut: the expansion vessel
can now be removed shifting the flow pipe on the
left side.
Replace in the reverse order. Ensure all seals are
in good condition, taking care to ensure they are
replaced correctly.
6.21
INPUT PCB & STATUS PCB (fig. 29)
Carry out component removal procedure as
described in section 6.4.
Refer to section 4.10 for details on how to remove
casing.
Remove the 5 screws securing the control board
cover. Carefully note the positions of all
connections relative to the PCB that is to be
removed. Remove the wiring and plugs from the
PCB. Locate and remove the securing screws.
Remove PCB.
Replace in the reverse order, ensuring correct
configuration of wiring.
Fig. 28
input PCB
status PCB
Fig. 29
21
SECTION 7
7.1
CHECKS, ADJUSTMENTS AND FAULT FINDING
CHECKING APPLIANCE OPERATION
When carrying out any repairs or servicing to the
appliance, the relevant commissioning and/or
set-up procedure must be undertaken to ensure
the continued safe operation of the appliance.
Particular attention should be made to ensure
gas soundness, water soundness, and the
electrical integrity of the appliance.
7.2
APPLIANCE MODE OF OPERATION
7.2.1
START-UP
When power is first supplied to the appliance it
will go through a self-purge procedure whereby
the pump and fan will be momentarily energised.
The boiler will then operate in either one of the
following modes:
● Stand-by
● Heating mode
7.2.2
7.2.3
7.3
SERVICE PARAMETERS (5 – 42)
To check or adjust the service parameters, you
must first access the service mode.
To access the service mode:
press and hold the
●
simultaneously for 2 seconds;
when “COdE” appears in the display, press
mode
buttons
S again, “C” should now be shown on the left
side of the display, with a random number on
the right side of the display;
●
using the + or
-
buttons, scroll until “05”
is shown in the right side of the display;
7.4
STAND-BY
When there is no demand for heating or hot
water. And the appliance remains inactive for a
period of 24 hours, the pump will be energised for
a few moments to prevent it from seizing. Should
the flow temperature sensor fall below 7 °C the
pump will be energised. If the flow sensor
temperature falls to below 3 °C the burner will be
lit and the appliance will operate at the minimum
output until the temperature of the flow sensor
reaches 10 °C, whereupon the pump will continue
to run in pump over-run mode.
CENTRAL HEATING MODE
When there is a request for heat via the time clock
and/or external controls the motorised valve and
pump will go through a self-test function this is to
ensure correct operation and valve configuration.
Once the self-test function is complete, the pump
and fan will be activated via the flow temperature
sensor. When the fan is sensed to be operating
correctly, the ignition sequence commences. The
speed of the fan and therefore the output of the
boiler is determined by the temperature of the
water sensed by the flow & return temperature
sensors, consequently a high temperature at the
flow sensor results in a lower fan speed. As the
water temperature increases, the temperature
sensors – located on the flow and return pipes of
the boiler – reduce the fan speed via the electronic
circuitry. Depending on the load, either the water
temperature will continue to rise until the set point
is achieved or the water temperature will fall
whereby fan speed will increase relative to the
output required. When the boiler has reached the
set point, the burner will switch off. The built-in
anti-cycle device prevents the burner from relighting for an adjustable period of time (factory
default is 92 seconds). When the temperature of
the flow sensor falls below the set-point, the
burner will re-light.
and S
●
●
press M to store the code;
●
press
to exit the sevice mode.
ADJUSTING THE GAS VALVE
The gas valve must be set-up or adjusted with
the aid of o properly calibrated flue gas
analyser.
Isolate the appliance from the electrical supply and
remove the appliance casing as described in section
4.10. Unclip and remove the front air chamber cover.
Set the flue gas analyser to read CO2 and insert
the probe into the flue analysis test point (fig. 1).
Restore the electrical supply to the boiler and
generate a request for central heating via the
room thermostat and/or timer.
Press the
mode
and
-
buttons at the same
time, the boiler will now run at minimum power for
15 minutes.
Consequently, by pressing the
mode
and +
buttons at the same time, the boiler will run on
maximum power for 15 minutes.
7.4.1
MINIMUM SETTING
With the boiler operating at minimum output the
CO2 reading should be 9.8% (+/- 0.2%). If the CO2
reading is correct, proceed to section 7.4.2. If the
CO2 reading is incorrect, the minimum gas
pressure must be adjusted as follows:
● Using a suitable screwdriver, very slowly turn
the minimum adjustment screw (fig. 30) –
clockwise to increase, counter clockwise to
decrease – until the correct value is displayed
on the CO2 analyser (allow time for the analyser
to stabilise).
● Using the procedure detailed in section 7.4,
change the fan speed momentarily from
minimum to maximum, then back to minimum.
● Check that the correct value is still being
obtained. If not, repeat the above procedure.
7.4.2
MAXIMUM SETTING
The maximum setting must only be checked and/
or adjusted after the correct minimum setting has
been verified. Using the procedure detailed in
section 7.4, change the power from minimum to
maximum.
With the boiler operating at maximum output the
CO2 reading should be 9.8% (+/- 0.2%). If the
CO2 reading is correct, press the + and
-
buttons at the same time to return to the normal
22
Service parameters must only be changed or adjusted by qualified service personnel
Parameter
Description
Range
5
6
7
8
9
10
11
12
13
Minimum setting for flow sensor
Unused
Unused
Unused
Unused
Unused
Unused
Unused
Maximum fan speed for heating
(hundreds)
Maximum fan speed (units)
Unused
Unused
Minimum fan speed (hundreds)
Minimum fan speed (units)
Ignition fan speed
Pump over-run
Unused
Set point drop before re-lighting
(heating)
Set point overshoot before burner
off (heating)
Unused
Unused
Unused
Unused
Heating anti-cycle
Unused
Unused
Temperature differential required
for modulation
Unused
Unused
Unused
Unused
Temporary manual fan speed
setting (20 minutes)
Unused
Unused
Unused
Unused
Unused
Normal output/off/minimum output/
off cycle
5 °C - 60° C
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
Factory setting
Pinnacle 16
20 °C
-15
20
-1
0
25
00
20
40* (4000 RPM)
Factory setting New setting
Pinnacle 26
20° C
-15
20
-1
0
25
00
20
55 (5500 RPM)
0 °C - 20 °C
00
40
00
13* (1300 RPM)
00
55* (5500 RPM)
10 minutes
1
5 °C
00
55
00
17 (1700 RPM)
00
44* (4400 RPM)
10 minutes
1
5 °C
0 °C - 10 °C
2 °C
2 °C
5 °C - 40 °C
-3
5
15
-2
9 (91.8 secs.)
0
3
25 °C
-3
5
15
-2
9 (91.8 secs.)
0
3
25 °C
0% - 100%
-1
15
00
00
-1 (= OFF)
-1
15
00
00
-1 (= OFF)
00 = OFF, 01 = ON
24
00
35
10
20
00
24
00
35
10
20
00
10 - 55 (RPM x 100)
00 - 99 (RPM)
05 - 55 (RPM x 100)
00 - 99
05 - 55 (RPM x 100)
01 - 99 minutes
0 - 30 (1=10.2 secs.)
*This is the setting for Natural Gas. On LPG versions, the factory setting is:
Parameter
Description
Range
13
Maximum fan speed for heating
(hundreds)
Minimum fan speed (hundreds)
Ignition fan speed
17
19
10 - 55 (RPM x 100)
Factory setting
Pinnacle 16
41* (4100 RPM)
Factory setting New setting
Pinnacle 26
55 (5500 RPM)
05 - 55 (RPM x 100)
05 - 55 (RPM x 100)
14* (1400 RPM)
39* (3900 RPM)
17 (1700 RPM)
30* (4400 RPM)
operating mode . If the CO2 reading is incorrect,
the maximum gas pressure must be adjusted as
follows:
● Using a suitable screwdriver, very slowly turn
the maximum adjustment screw (fig. 30) –
clockwise to increase, counter clockwise to
decrease – until the correct value is displayed
on the CO2 analyser (allow time for the analyser
to stabilise).
● Using the procedure detailed in section 7.4,
change the power momentarily from maximum
to minimum, then back to maximum.
● Check that the correct value is still being
obtained. If not, repeat the above procedure.
●
Press the +
and
-
buttons at the same
time to return to the normal operating mode.
Isolate the appliance from the electrical supply
and remove the analyser test probe from the
analysis test point and refit cap. Refit the air
chamber cover. Refit appliance casing.
NOTE
You should ensure that all radiators or heat
emitters are fully open during the above
procedures. This will ensure that the fan speed
(output) of the boiler is not compromised due to a
high flow temperature.
23
Maximum
screw
Minimum
screw
Fig. 30
7.5
1ST DIGIT STATUS CODE
When the boiler is operating normally (without
fault), the first digit of the display shows the
current status of the boiler whilst the right side will
show the relevant temperature.
Status
Standby
Purge
Ignition
Burner on
Waiting for fan
Built-in delay
Pump over-run
Temporary fault
condition
Combustion test at
maximum output
Combustion test at
minimum output
Anti seizing cycle
Manual operation of
fan
7.6
7.7
24
1st digit
0
1
2
3
5
6
7
9/b
H
Right
Flow temperature
Flow temperature
Flow temperature
Flow temperature
Flow temperature
Flow temperature
Flow temperature
Flow temp./temporary fault
code
Flow temperature
L
Flow temperature
A
t
Flow temperature
Flow temperature
Reason
b 18
b 19
b 24
b 25
b 26
b 28
b 29
b 30
b 65
Flow sensor above 95 °C
Return sensor above 95 °C
Temperature differential inverted
Excessive temperature rise
Condensate trap blocked
No signal from fan
Incorrect signal from fan
Temperature differential exceeded
Insufficient fan speed for ignition
FINAL FAULT CODES
When a volatile lockout condition occurs, or a
temporary fault condition has not been corrected,
the appliance will be permanently locked out and
a manual reset will be required.
Reason
E 00
E 02
E 03
E 04
E 05
E 06
E 07
E 11
E 13
E 14
E 15
E 16
E 17
E 18
E 19
E 25
E 28
E 29
E 30
E 31
E 32
E 36
E 37
E 44
E 60
E 65
False flame
No flame detected
Internal fault (PCB)
Appliance lockout and power failure
Internal fault (PCB)
Internal fault (PCB)
Internal fault (PCB)
Internal fault (PCB)
Internal fault (PCB)
Internal fault (PCB)
Internal fault (PCB)
Internal fault (PCB)
Internal fault (PCB)
Flow sensor temperature exceeded
Return sensor temperature exceeded
Excessive temperature rise
No signal from fan
Incorrect signal from fan
Temperature differential exceeded
Short circuit on flow sensor
Short circuit on return sensor
Open circuit on flow sensor
Open circuit on return sensor
Internal fault (PCB)
Parameter anomaly
Not enough fan driving force
7.8
TEMPORARY FAULT CODES
The built-in fault diagnostic system automatically
displays a unique fault code that can be used to
determine why the boiler has temporarily locked
out.
Code
Code
DIAGNOSTIC RECALL
In addition to displaying a fault code, the appliance
memorises the operating conditions at the time of
lockout, this information can be recalled and
displayed using the following procedure:
1st digit
shows
Right display
shows
1
2
3
4
5
6
Most recent fault code
Appliance status at time of fault
Flow sensor temperature at time of fault
Return sensor temperature at time of fault
N/A
N/A
●
●
●
access the appliance service mode as detailed
in section 5.10
press the mode
in the display
press the S
button until “ERRO” appears
button to recall the information
as detailed below
●
7.9
reset
press the
service mode.
button to exit the appliance
CHECKING THE EXPANSION VESSEL
Carry out the component removal procedure as
described in section 6.4. You must ensure that
the boiler is completely drained of water.
Using a suitable pressure gauge, remove dust
cap on expansion vessel and check the charge
pressure. The correct charge pressure should be
1.0 bar ± 0.1 bar. If the charge pressure is less,
use a suitable pump to increase the charge.
Please note, you must ensure the safety valve is
in the open position whilst re-charging takes
place. Replace the dust cap and carry out the
relevant commissioning procedure.
7.10
EXTERNAL FAULTS
Before carrying out any fault-finding or component
replacement, ensure the fault is not attributable
to any aspect of the installation.
For example, external wiring fault, service valves
closed, gas supply turned off, etc. The table
below may assist in identifying some common
installation faults.
Fault code
displayed
E 02
b/E 18
E 36
7.11
Possible cause
Gas turned off
Air in gas pipe
Insufficient gas
Pump seized
Flow/return service valve closed
Flow sensor cable disconnected
ELECTRICAL CHECKS
Any electrical checks must be carried out by a
suitably qualified person.
7.11.1 EARTH CONTINUITY TEST
Isolate the appliance from the electrical supply,
and using a suitable multi-meter carry out a
resistance test. Connect test leads between an
appliance earth point and the earth wire of the
appliance supply cable. The resistance should
be less than 1 ohm. If the resistance is greater
than 1 ohm check all earth wires and connectors
for continuity and integrity.
7.11.2 SHORT CIRCUIT CHECK
Isolate the appliance from the electrical supply,
and using a suitable multi-meter, carry out a short
circuit test between the Live & Neutral connections
at the appliance input board (fig.14).
Repeat above test on the Live & Earth connections
at the appliance input board (fig.14).
NOTE
Should it be found that a fuse has failed but no
fault is indicated, a detailed continuity
Check will be required to trace the fault. A visual
inspection of components may also assist in
locating the fault.
7.11.3 POLARITY CHECK
With the appliance connected to the electrical
supply and using a suitable multi-meter, carry out
the following voltage tests:
● connect test leads between the Live & Neutral
connections at the appliance input board (fig.14).
The meter should read approximately 230V ac.
If so proceed to next stage. If not, see section
7.11.4.
● connect test leads between the Live & Earth
connections at the appliance input board (fig.14)
the meter should read approximately 230V ac.
If so proceed to next stage. If not, see section
7.11.4.
● connect test leads between the Neutral & Earth
connections at the appliance input board (fig.14)
the meter should read approximately 0 – 15Vac.
If so polarity is correct. If not, see section
7.11.4.
the isolator, re-check wiring and connections
between the isolator and the appliance.
If tests on the isolator also reveal reversed polarity
or a supply fault, consult the local electricity
supplier for advice.
7.11.5 RESISTANCE TO EARTH CHECK
Isolate the appliance from the electrical supply,
and using a suitable multi-meter carry out a
resistance test. Connect test leads between the
Live & Earth connections at the appliance input
board (fig.14). If the meter reads other than
infinity there is a fault that must be isolated, carry
out a detailed continuity check to identify the
location of the fault.
IMPORTANT
These series of checks must be carried out
before attempting any fault-finding procedures
on the appliance. On completion of any task that
required the disconnection and re-connection of
any electrical wiring or component, these checks
must be repeated.
7.11.6 FUSES
The appliance is equipped with spare fuses.
These fuses are located on the covers of the input
board and main PCB respectively. If a fuse has
blown it is usually indicative of an external wiring
fault or a faulty component such as the pump, fan,
valve actuator, etc. Under no circumstances
should a blown fuse be replaced with one of a
higher rating.
7.12
FAULT FINDING
BEFORE ATTEMPTING ANY FAULT
DIAGNOSIS OR REPAIR THE FOLLOWING
PROCEDURE SHOULD BE CARRIED OUT:
● carry out the relevant electrical checks as
detailed in section 7.11;
● disconnect any external wiring from plug M7
(terminals 2 & 3) and replace with a solid link
wire;
● ensure the appliance is protected – externally –
by a 3-amp fuse.
7.12.1 FAULT FINDING TESTS
If a lockout code is displayed on digits 3 & 4,
please refer to section 7.6 for the cause of the
lockout.
FAULT
No display, boiler inactive
No display, pump running
No display, pump running, fan speed alternating
No display, boiler working OK
Pump failure
Fan fault
Ignition fault
GO TO
Test 1
Test 1A
Test 1A
Test 1A
Test 2
Test 3
Test 4
7.12.2 WIRING DIAGRAMS
Figures 33 & 34 indicate the positions of all plugs,
fuses and internal wiring configuration.
7.11.4 REVERSED POLARITY OR SUPPLY FAULT
Repeat the above tests at the appliance isolator,
if testing reveals correct polarity and/or supply at
25
7.12.3 FAULT FINDING TEST ‘1’
M2
M3
26
7.12.4
FAULT FINDING TEST ‘1A’
27
7.12.5 FAULT FINDING TEST ‘2’
28
7.12.6 FAULT FINDING TEST ‘3’
29
7.12.7
30
FAULT FINDING TEST ‘4’
SECTION 8
8.1
8.2
WIRING DIAGRAMS
INSTALLATION OF VOKERA TIMECLOCK
(part n° 201 or 202)
The Vokera time clock (part no. 201 & 202) can be
installed using the following procedure:
• Isolate the appliance from the electrical supply
and remove the casing as described in 4.9.1.
• Gain access to the electrical input board as
detailed in 4.9.2.
• Remove the square blanking plate from the
clock aperture of the control panel.
• Connect the wires to the clock as shown in fig.
31.
• Mount the clock to the clock aperture using the
screws provided.
• Remove the factory fitted link between
terminals 2 & 3 on plug M7.
• Connect the clock wires to the electrical input
board as shown in fig. 31.
• Replace the input board cover and appliance
casing once the clock installation has been
completed.
Room thermostat contact rated at 230V
Fig. 31
EXTERNAL CONTROLS WIRING
If additional or alternative controls are required,
they must be connected to the boiler as shown in
the following diagrams.
NOTE
Guidance on the recommended practice for the
installation of external controls, can be found
in CHeSS – HC1/HC2 (www.energyefficiency.gov.uk).
“S” plan system
Room
thermostat
contact rated at
230V
Fig. 32
31
“Y” plan system
Room
thermostat
contact rated at
230V
Fig. 32A
32
NOTE. L-N-E CONNECTION MUST NOT BE INTERCHANGED
FUNCTIONAL DIAGRAM
Fig. 33
Key
R.T.
F
P
S1
S2
BE05
MCBA
L1
L2 (V)
Room thermostat
Fan
Pump
Flow thermistor (NTC)
Return thermistor (NTC)
Connection board
Control board
N/A
Led OK
L2 (R)
L3
F1
F3
S/S.E.
OPE
P.S.
Led alarm
N/A
Fuse 2 AF
Fuse 4 AT
Spark/sense electrode
Gas valve solenoids
Pressure switch (NC)
33
NOTE. L-N-E CONNECTION MUST NOT BE INTERCHANGED
CONTROL SWITCHING OF TIME CLOCK AND ROOM THERMOSTAT RATED AT 230V.a.c.
FUNCTIONAL DIAGRAM
Fig. 34
34
PCB
Input PCB
Input PCB
Input PCB
Input PCB
Input PCB
Input PCB
PLUG or CONNECTION
M2
M3
M4
M5
M7
F1
DESIGNATION
Incoming 230V supply
230V supply to main PCB
230V clock supply
Low voltage connector (to main PCB)
Low voltage connector (heat request)
2AF fuse
PCB
Main PCB
Main PCB
PLUG or CONNECTION
X1
X2
Main PCB
Main PCB
Main PCB
Main PCB
Main PCB
Main PCB
Main PCB
X3
X7
X8
X10
F1
F2
F3
DESIGNATION
Incoming 230V supply & pump connection
Fan connection, condense pressure switch
connection, gas valve connection
Sensor connections
Display board connection
Unused
External transformer connection
2AF fuse
2AF fuse
4AT fuse
PCB
Display PCB
Display PCB
Display PCB
PLUG or CONNECTION
X7A
X9
3-pins connector
DESIGNATION
Connection from main PCB
Unused
Status LED connection
PCB
Gas valve
Fan
Condense pressure switch
Flow sensor
Return sensor
Pump
External transformer
24V connection for time clock or
room thermostat
Relay for actuator
Status LED
PLUG or CONNECTION
OPE
F
P.S.
S1
S2
P
R.T.
DESIGNATION
Plug X2 on main PCB
Plug X2 on main PCB
Plug X2 on main PCB
Plug X3 on main PCB
Plug X3 on main PCB
Plug X1 on main PCB
Plug X10 on main PCB
Plug M4 on input PCB (terminals 2 & 3)
RL3V
L2
Input PCB
3-pins connector on display PCB
35
SECTION 9
EXPLODED DIAGRAMS
90
100
31
16
17
20
1
67
74
260
226
101
18
16
48
261
75
21
15
99
80
43
26
300
13
50
49
39
301
12
40
POS.
DESCRIPTION
16
26
1
12
13
15
16
17
18
20
21
26
31
39
40
43
48
49
Frame
Quick primer pressure gauge
Pin
Cover
2 A 5X20 inline fuse
3,15 A 5X20 inline fuse
Printed Circuit Board cover
Printed Circuit Board
Led Light Guide
Instrumental panel
Case
Spring
Door panel
Push-push cover
Green-red led
Plastic bezel
001005243
1857
10023044
10023681
8968
8969
10021849
10023549
10023892
10023346
10023589
1862
10023772
1864
1858
8654
001005243
1857
10023044
10023681
8968
8969
10021849
10023549
10023892
10023346
10023589
1862
10023772
1864
1858
8654
36
50
67
74
75
80
90
99
100
101
226
260
261
300
301
Pin
Printed circuit holding
Bracket
Display Printed Circuit Board
Printed Circuit Board
Fuse
Membrane keypad
Cover
Wired transformer
Edge clip
Nut
O-ring
Flat cable
Cable
1867
10023476
10023571
10023297
10023763
3478
10023891
10023477
10023478
5128
5230
1869
10023586
10024393
1867
10023476
10023571
10023297
10023763
3478
10023891
10023477
10023478
5128
5230
1869
10023586
10024393
3
7
52
9
31
277
22
23
353
27
27
353
POS.
DESCRIPTION
16
26
3
7
9
22
23
27
31
52
277
353
Pressure switch
Heating by-pass valve
Heating distributor manifold
Safety valve
Pipe
Heating cock
Venting plugs kit
Bracket
Screw
Ogive
10022556
1552
10021821
1806
10023065
1789
01005137
10022671
6903
1824
10022556
1552
10021821
1806
10023065
1789
01005137
10022671
6903
1824
37
16
310
34
8
9
200
12
338
1
200
10
201
2
200
2
316 253
338
369
200
200
27
6
291
310
370 36
371
3
398
25
26
291
5
288
POS.
DESCRIPTION
16
26
1
2
3
4
5
6
8
9
10
12
16
25
26
27
Expansion vessel
Flexible pipe
Pump
Pump cable
Brass nut
Pipe
Heat exchanger
Pipe
Pipe
Washer
Air vent bottle + cock assembly
Siphon
Pipe
Pipe
2573
2164
8876
10023573
10022444
10023574
8884
10023575
10023697
9287
9806
10024112
10023530
10023579
2573
2164
8876
10023573
10022444
10023574
8884
10023575
10023697
9287
9806
10024112
10023530
10023579
38
34
36
200
201
253
288
291
310
316
338
369
370
371
398
Connection for air vent bottle
Connection pipe
Washer
Washer
Headless screw
O-ring
Washer
NTC sensor
Washer
Connection for dom. exp. vessel
Connection
O-ring
Clip
Clip
8911
10023580
5023
5026
5216
6898
6897
1194
1022
8873
10023493
10023533
10023532
10024336
4
8911
10023580
5023
5026
5216
6898
6897
1194
1022
8873
10023493
10023533
10023532
10024336
40
4
40
35
17
3
5
200
24
12
23
256
2
200
13
27
21
200
295
41
39
14
200
351
15
16
1
1
POS.
DESCRIPTION
16
26
1
2
3
4
5
12
13
14
15
16
17
21
Roomsealed chamber
Upper panel for air box
Main burner jet support
Main burner
Spark electrode kit
Gas pipe
Gas valve
Pipe
Gas cock connection
Front panel for air box
Glass kit
Washer
10023486
8881
1195
1196
01005242
10022442
10022441
10023578
1787
1035
01005234
5905
10023486
8881
1195
1196
01005242
10022442
10022441
10023578
1787
1035
01005234
5905
23
23
24
27
35
39
40
41
200
256
295
351
Main burner jet NG
Main burner jet LPG
Washer
Air box hole cap
Air conveyor
Gas pipe
Washer
Spring
Washer
Screw
Silicone tube
Brass nut
8897
10022453
9299
8084
10022450
10022443
9285
9296
5023
5221
1457
1823
8970
9295
9299
8084
8886
10022443
9285
9296
5023
5221
1457
1823
39
23
20
22
2
6
5
4
14
11
13
341
321
10
40
POS.
DESCRIPTION
16
26
2
4
5
6
10
11
13
14
20
22
23
40
41
321
341
Exchanger lower insulation panel
Exchanger upper insulation panel
Clip
Cover for heat exchanger
Fan
Gas diaphragm
Pressure connection
Pressure connection
Connection
Washer
Plug
Screw
Screw
Fan gasket
Screw
1193
1016
10021115
1033
10024230
10022451
8915
8916
8908
8912
8909
1006
9292
8893
10021080
1193
1016
10021115
1033
10024230
8915
8916
8908
8912
8909
1006
9292
8893
-
40
41
SECTION 10
L.P.G. INSTRUCTIONS
For details of converting boilers to LPG please refer to the instructions supplied with the relevant conversion kit.
10.1 TECHNICAL DATA
16
Inlet pressure
37 mbar
Gas rate (max.)
2.49 l/per hr.
Gas rate (min.)
0.72 l/per hr.
Injector size
Single injector with six 1.6 mm holes
CO2 level (cover off)
9,80%
Maximum fan speed for heating
4.100RPM*
Minimum fan speed
1.400RPM*
Soft-light
3.900RPM*
NOx (max)
40 ppm
NOx (min)
20 ppm
CO (max)
50 ppm
CO (min)
50 ppm
26
37 mbar
4.08 l/per hr.
1.19 l/per hr.
Single injector with six 2.3 mm holes
9,80%
5.500RPM*
1.700RPM*
3.000RPM*
30 ppm
20 ppm
50 ppm
50 ppm
* set parameters: P. 13 (maximum), P. 17 (minimum), P. 19 (ignition) as shown in section 7.3.
10.2 RELATED DOCUMENTS
BS 6798
INSTALLATION OF BOILERS OF RATED INPUT NOT EXCEEDING 60 kW
BS 5449
PART 1
FORCED CIRCULATION HOT WATER SYSTEMS
BS 5440
PART 1
FLUES
BS 5482
PART 1
DOMESTIC BUTANE & PROPANE GAS BURNERS IN PERMAMENT DWELLINGS
10.3
10.4
10.5
GAS SUPPLY
The gas supply must be connected to the
appliance by a competent LPG installer and must
be of sufficient size to supply the appliance at its
maximum output.
An existing supply must be checked to ensure
that it is of adequate size to deal with the maximum
rated input of this and any other appliances that
it serves.
GAS SUPPLY INSTALLATION
The entire installation including the meter, must
be purged and checked for gas soundness.
ADJUSTING THE GAS VALVE
The gas valve must be set-up or adjusted with
the aid of a properly calibrated flue gas
analyser.
Remove the appliance casing as detailed in
section 4.10. Unclip and remove the air chamber
cover. Set the flue gas analyser to read CO2 and
insert the probe into the flue analysis test point
(see fig.1). Using the procedure as detailed in
section 7, enter the appliance service mode and
set the power to minimum.
10.5.1 MINIMUM SETTING
With the boiler operating at minimum output the
CO2 reading should be 9.8% (+/- 0.2%). If the CO2
reading is correct, proceed to 10.5.2. If the CO2
reading is incorrect, the minimum gas pressure
must be adjusted as follows:
● using a suitable screwdriver, very slowly turn the
minimum adjustment screw (fig. 30) – clockwise
to increase, counter clockwise to decrease – until
the correct value is displayed on the CO2 analyser
(allow time for the analyser to stabilise).
● using the procedure as detailed in section 7,
change the power momentarily from minimum
to maximum, then back to minimum.
●
check that the correct value is still being
obtained. If not, repeat the above procedure.
10.5.2 MAXIMUM SETTING
The maximum setting must only be checked and/
or adjusted after the correct minimum setting has
been verified. Using the procedure as detailed in
section 7, change the power from minimum to
maximum.
With the boiler operating at maximum output the
CO2 reading should be 9.8% (+/- 0.2%). If the CO2
reset
reading is correct, press the
button to
exit the appliance engineer mode. If the CO2
reading is incorrect, the maximum gas pressure
must be adjusted as follows:
● using a suitable screwdriver, very slowly turn
the maximum adjustment screw (fig. 33) –
clockwise to increase, counter clockwise to
decrease – until the correct value is displayed
on the CO2 analyser (allow time for the analyser
to stabilise).
● using the procedure as detailed in section 7,
change the power momentarily from maximum
to minimum, then back to maximum.
● check that the correct value is still being
obtained. If not, repeat the above procedure.
reset
press the
button to exit the appliance
service mode.
Remove the analyser test probe from the analysis
test point and refit cap. Refit the air chamber
cover. Refit appliance casing.
NOTE
You should ensure that all radiators or heat
emitters are fully open during the above
procedures. This will ensure that the power
(output) of the boiler is not compromised due to a
high flow temperature.
●
41
Cod. 10023766 - 39/03 - Ed. 2
energizing home heating
Vokèra Ltd.
4th Floor, Catherine House, Boundary Way, Hemel Hempstead, Herts, HP2 7RP
Email: enquiries@vokera.co.uk Web: www.vokera.co.uk
Sales, Technical Advice, General Enquiries - Tel: 0870 333 0520 Fax: 01442 281403
After Sales Service - Tel: 0870 333 0220
Vokèra Ireland
West Court, Callan, Co Kilkenny
Tel: 05677 55057 Fax: 05677 55060
Vokèra Ltd. reserve the right to change the specifications without prior notice. Consumers’ statutory rights are not affected.
A Riello Group Company
COLLECTIVE MARK
“Vokèra”
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