Mynute 35HE installation and servicing manual
Installation
& Servicing
Instructions
0694
0694BQ0479
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)
Safety devices
Technical data
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.8A
2.9
2.10
2.11
Central heating
Gas pressure
Expansion vessel
Dimensions
Clearances
Connections
Electrical
Flue details (concentric)
Flue details (twin pipes)
Efficiency
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
Related documents
Location of appliance
Gas supply
Flue system
Air supply
Water circulation
Electrical supply
Mounting on a combustible surface
Timber framed buildings
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 Inhibitors
3A.11 Declaration of conformity
Installation
4.1
4.2
4.3
4.4
4.5
4.6
4.7
Delivery
Contents
Unpacking
Preparation for mounting the appliance
Fitting the flue
Connecting the gas & water
Electrical connections
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
Page
2
2
2
2
Page
3
3
3
3
3
3
3
3
3
3
3
4
Page
4
4
5
5
5
5
6
6
6
6
Page
7
7
7
8
8
8
8
8
8
8
8
Page
9
9
9
9
9
13
14
Page
Gas supply installation
15
The heating system
15
Initial filling of the system
15
Initial flushing of the system
15
Pre-operation checks
15
Initial lighting
15
Checking the gas pressure & combustion analysis 15
Final flushing of the heating system
15
Setting the boiler operating temperature
15
Setting the system design pressure
16
Regulating the central heating system
16
Final checks
16
Instructing the user
16
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 assembly
Safety valve
Bottom automatic air release valves
Water pressure sensor/gauge
Primary thermistors
Return thermistors
Printed circuit board
Gas valve
Electrode and condense sensor
Flue fan & mixer
Burner
Main heat exchanger
Automatic by-pass & DHW non-return valve
Expansion vessel
Fan transformer removal
Condense trap removal
Flue collector removal
Checks, adjustments and fault finding
7.1
7.2
7.3
7.4
7.5
7.6
7.7
7.8
7.9
7.10
7.11
Checking appliance operation
Appliance mode of operation
Service mode & parameters
Adjusting mode & the gas valve
Combustion analysis test
Checking the expansion vessel
External faults
Electrical checks
Fault finding
Temporary fault codes
Final fault codes
Wiring diagrams
8.1
8.2
8.3
External wiring
Typical control applications
Other devices
Exploded diagrams
9.1
9.2
9.3
9.4
9.5
Table
Table
Table
Table
Table
1
2
3
4
5
L.P.G. instructions
9.1
9.2
9.3
9.4
9.5
9.6
Related documents
Technical data
Converting the appliance gas type
Gas supply
Gas supply installation
Adjusting the gas valve
Benchmark
17
17
17
17
17
17
18
18
18
18
18
18
18
19
19
19
19
20
20
20
20
Page
21
21
22
22
23
23
23
23
24
24
24
Page
27
27
27
Page
30
31
32
33
34
Page
35
35
35
35
35
35
36-37
INTRODUCTION
The Mynute 35HE is a high-efficiency system boiler with
an output of 34kW. The appliance - by design - incorporates electronic ignition, circulating pump, expansion vessel, safety valve, pressure gauge and automatic by-pass.
The 35HE is produced as a room sealed, category II2H3P
appliance, suitable for internal wall mounting applications
only. It 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. The 35HE can also be used with
the Vokera twin flue system.
The Mynute 35HE is approved for use with C12 & C32 type
flue applications.
This appliance is designed for use with a sealed system
only; consequently it is not intended for use on open
vented systems.
General layout (fig. 1)
1
Water pressure sensor/Transducer
2
Drain valve
3
Safety valve
4
Hydraulic manifold
5
Pump
6
Bottom auto air vent (AAV)
7
Injector
8
Transformer
9
Condense trap
10 Return sensor
11 Flue gas analysis test point
12 Flue outlet & air intake
13 Ignition transformer
14 Top AAv
15 Flow sensor
16 Spark/Sensing Electrode
17 Cylindric Burner
18 Condensate level sensor
19 Main Heat Exchanger
20 Fan Assembly
21 Mixer
22 Expansion Vessel
23 Hydrometer
24 Gas valve
25 Condensing drain
R
F
G
Heating return connection
Heating flow connection
Gas connection
fig. 1A:
1=
heating temperature control
2=
ON/OFF/RESET button
3=
MODE button
4=
INFO button
R
Fig. 1
F
G
Symbols description
Economy
Comfort
Heating temperature bar
Temporary fault indicator
Reset
Current water pressure
Outside sensor
Current appliance temperature
Error code
Current mode of operation
Fig. 1A
1
2
3
4
Burner on
Frost protection on
1
SECTION 1
1.1
1.2
1.3
1.4
2
DESIGN PRINCIPLES AND OPERATING SEQUENCE
• fan speed sensor and pressure differential mechanism to ensure safe operation of the burner
• a high limit thermostat that over-rides the temperature control circuit to prevent or interrupt the
operation of the burner
• a sensor that interrupts the operation of the
appliance if the condense pipe becomes blocked
• a safety valve which releases excess pressure
from the primary circuit.
PRINCIPLE COMPONENTS
• A fully integrated electronic control board featuring electronic temperature control, anti-cycle
control, pump over-run, self-diagnostic fault indicator, full air/gas modulation.
• Radial aluminium heat exchanger.
• Electronic ignition with flame supervision.
• Integral high-head pump.
• Fan.
• Expansion vessel.
• Water pressure switch.
• Condensate level sensor.
• Pressure gauge.
• Safety valve.
ECONOMY/COMFORT MODES
The boiler can be used in either comfort or
economy mode. When the economy mode has
been selected, the automatic temperature control
(SARA) functions over a reduced temperature
range. When the comfort mode is selected, the
SARA function is active throughout the entire temperature range.
MODE OF OPERATION (at rest)
When the appliance is at rest and there are no
requests for heating or hot water, the following
functions are active:
• 2-stage frost-protection system: the frost-protection system protects the appliance against
the risk of frost damage. The first stage enables
activation of the pump should the temperature of
the appliance fall to 7°C. The second stage
becomes active when the temperature has
dropped to 3°C. Should the second stage become active, the appliance will function on
minimum power until it reaches 30°C.
• Anti-block function: the anti-block function enables the pump to be energised for short periods,
when the appliance has been inactive for more
than 19-hours.
MODE OF OPERATION
When there is a request for heat and/or hot water,
via the programmer/time clock and/or any external
control, the pump and fan are started, the fan
speed will modulate until the correct signal voltage
is received at the control PCB. At this point an
ignition sequence is enabled.
Ignition is sensed by the electronic circuitry to
ensure flame stability at the burner. Once successful ignition has been achieved, the electronic
circuitry increases the gas rate to 75% for a period
of 15 minutes. Thereafter, the boiler’s output will
either be increase to maximum or modulate to suit
the set requirement.
When the appliance reaches the desired temperature the burner will shut down and the boiler will
perform a three-minute anti-cycle (timer delay).
When the request for heat has been satisfied the
appliance pump and fan may continue to operate
to dissipate any residual heat within the appliance.
SAFETY DEVICES
When the appliance is in use, safe operation is
ensured by:
• a water pressure switch that monitors system
water pressure and will de-activate the pump,
fan and burner should the system water pressure drop below the rated tolerance.
top AAV
flow
temperature
sensor
return
temperature
sensor
main heat
exchanger
expansion
vessel
bottom
AAV
pump
water
pressure sensor
& gauge
transducer
automatic
by-pass
safety
valve
CH
return
Fig. 2
CH
flow
SECTION 2
TECHNICAL DATA
2.1 Central Heating
Heat input (kW)
Maximum heat output @ 60/80 °C (kW)
Maximum heat output @ 30/50 °C (kW)
Minimum heat output @ 60/80 °C (kW)
Minimum heat output @ 30/50 °C (kW)
Minimum working pressure
Maximum working pressure
Minimum flow rate
2.2 Gas Pressures
Inlet pressure (G20)
Maximum gas rate (m3/hr)
Minimum gas rate (m3/hr)
Injector size
Fan speed @ max output (rpm)
Fan speed @ min output (rpm)
2.3 Expansion Vessel
Capacity
Maximum system volume
Pre-charge pressure
2.4 Dimensions
Height
Width
Depth
Dry weight (Kg)
2.5 Clearances
Sides
Top
Bottom
Front
2.6 Connections
Flow & return
Gas
Safety valve
Condense
2.7 Electrical
Voltage (V/Hz)
Power consumption (W)
Internal fuse
External fuse
2.8 Flue details (concentric)
Maximum horizontal flue length (60/100mm)
Maximum vertical flue length (60/100mm)
Maximum horizontal flue length (80/125mm)
Maximum vertical flue length (80/125mm)
2.8A Flue details (twin pipes)
Maximum horizontal flue length (80mm+80mm)
Maximum vertical flue length (80mm+80mm)
2.9 Efficiency
SEDBUK (%)
NOx class
2.10 Emissions
NOx (max-min)
CO (max-min)
CO2 (max-min)
CO/CO2 ratio (max)
CO/CO2 ratio (min)
Mynute 35HE
34.60
33.74
36.75
6.88
7.55
0.5 bar
3 bar
350 l/h
20.0 mbar
3.66
0.74
7.0mm
6.000
1.400
10 litres
91 litres
1.0 bar
845 mm
453 mm
359 mm
43.0
12 mm
150 mm from casing or 25 mm above flue elbow (whichever is applicable)
150 mm
600 mm
22
15
15
21
mm
mm
mm
mm
230/50hz
175
2A
3A
7.80m
8.80m
28.0m
28.0m
50m+50m
50m+50m
90.03 (A)
5
123.5/105.9 mg/kWh
193.5/43 mg/kWh
9.0 - 9.0 %
0.002 to 1
0.0004 to 1
Ref. Condition 15 °C, 1013,25 mbar, dry gas
NOTE: L.P.G. data refer to section 10
3
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 °C temperature differential.
3rd
Residual head (mbar)
2.11
2n
1st
Fig. 3
SECTION 3
spe
ds
pe
spe
ed
ed
ed
Flow rate (l/h)
GENERAL REQUIREMENTS (UK)
Fig. 4
Key
A
B
C
D
E
F
G
H
I
J
K
L
M
N
P
Q
Location
Minimum distance
Below an opening (window, air-brick, etc.)
Above an opening (window, air-brick, etc.)
To the side of an opening (window, air-brick, 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
This appliance must be installed by a competent
person in accordance with the Gas Safety (Installation & Use) Regulations.
3.1
4
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.
300 mm
300 mm
500 mm
75 mm
200 mm
1200 mm
150 mm
300 mm
300 mm
1200 mm
1200 mm
1200 mm
1500 mm
300 mm
500 mm
As determined by the fixed collar
of the vertical terminal
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.
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.
3.3
3.4
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 BS6891.
If the gas supply serves more than one appliance,
it must be ensured that an adequate supply is
maintained to each appliance when they are in use
at the same time.
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 fig. 4).
In cold and/or humid weather, water vapour will
condense on leaving the terminal; the effect of
such pluming must be considered.
If installed less than 2m above a pavement or
platform to which people have access (including
balconies or 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, fanflued 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.
3.6.1
PIPEWORK
It is recommended that copper tubing to BS 2871
Part 1 is used in conjunction with soldered capillary joints.
Where possible pipes should have a gradient to
ensure air is carried naturally to air release points
and that water 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
AUTOMATIC BY-PASS
The appliance has a built-in automatic by-pass,
consequently there is no requirement for an external by-pass, however the design of the system
should be such that it prevents boiler ‘cycling’.
3.6.3
DRAIN COCKS
These must be located in accessible positions to
facilitate draining of the appliance and all water
pipes connected to the appliance. The drain cocks
must be manufactured in 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 (see
6.19).
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
5
3.6.6
FILLING POINT
A method for initial filling of the system and replacing water lost during servicing etc. is required (see
fig. 5). This method of filling must comply with the
current Water Supply (Water Fittings) Regulations
1999 and Water Bylaws 2000 (Scotland).
3.8
3.9
control
valve
control
valve
temporary
connection
3.10
flow/return
pipe
double
check valve
Fig. 5
3.6.7
supply
pipe
Stopcock
5.0 metres minimum
Make-up vessel
or tank
Non-return
valve
Heating
return
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.
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 3mm. 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.
6
INHIBITORS
Vokera recommend that an inhibitor - suitable for
use with copper and aluminium heat exchangers is used to protect the boiler and system from the
effects of corrosion and/or electrolytic action. The
inhibitor must be administered in strict accordance with the manufacturers instructions*.
*Water treatment of the complete heating system
- including the boiler - should be carried out in
accordance with BS 7593 and the Domestic Water
Treatment Association’s (DWTA) code of practice.
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 (see fig. 5A).
Automatic
air-vent
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.
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 Timber Frame
Buildings’.
Fig. 6
Fig. 6A
Fig. 6B
C/H flow
valve
Safety
valve outlet
Gas
cock
C/H return
valve
SECTION 3A
GENERAL REQUIREMENTS (EIRE)
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.
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
3A.2
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.
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
3A.3
GAS SUPPLY
The gas meter - as supplied by the gas supplier must be checked to ensure that it is of adequate
size to deal with the maximum rated input of all the
appliances that it serves. 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.
7
3A.4
FLUE SYSTEM
The terminal should be located where the dispersal of combustion products is not impeded and
with due regard for the damage and discoloration
that may occur to building products located nearby.
The terminal must not be located in a place where
it is likely to cause a nuisance (see I.S. 813). In
cold and/or humid weather, water vapour will
condense on leaving the terminal; the effect of
such pluming must be considered. If installed less
than 2m above a pavement or platform to which
people have access (including balconies or 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, fanflued 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 (see 6.19).
3A.6.6 FILLING POINT
A method for initial filling of the system and replacing
water lost during servicing etc. is required (see fig.
14). You should ensure this method of filling complies with the local water authority regulations.
8
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 (see 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.
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 3mm. 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
Buildings’ gives specific advice on this type of
installation.
3A.10 INHIBITORS use new text here!!!
Vokera recommend that an inhibitor - suitable for
use with copper and aluminium heat exchangers is used to protect the boiler and system from the
effects of corrosion and/or electrolytic action. The
inhibitor must be administered in strict accordance with the manufacturers instructions*.
*Water treatment of the complete heating system
- including the boiler - should be carried out in
accordance with I.S. 813 and the Domestic Water
Treatment Association’s (DWTA) code of practice.
3A.11 DECLARATION OF CONFORMITY
A Declaration of Conformity (as 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.
SECTION 4
4.1
4.2
4.3
4.4
4.5
4.5.1
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, guarantee registration card, and a 3-amp fuse.
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 sidee. Protective gloves
should be used to lift the appliance, the appliance
back-frame should be used for lifting points.
be made to the maximum length (see table below)
when additional bends are used.
Reduction for additional bends
Bend
Reduction in maximum flue length for each
bend
45° bend
0.5 metre
90° bend
1.0 metre
Horizontal flue terminals and accessories
Part No.
0225720
Description
Min-Max length
Horizontal flue kit for use with
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
Using the template provided, mark and drill a
125mm hole for the passage of the flue pipe. The
hole should be drilled level to ensure any condense fluid that forms, is allowed to drain back to
the appliance.
The fixing holes for the wall-mounting bracket
should now be drilled and plugged, an appropriate
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.
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
(see fig. 6) and flue-hole (if applicable).
Push-fit
connection
Horizontal
terminal or
extension
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 4.5.2).
(For twin flue applications, see 4.5.3).
The appliance can be used with either the Vokera
condensing 60/100mm concentric flue system or
the optional 80/125mm concentric flue system.
NOTE
These instructions relate only to the Vokera
condensing 60/100mm concentric flue system.
For specific details on the installation of the 80/
125mm concentric flue system please refer to the
instructions supplied.
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 2.9). A reduction must also
1000 mm
add. bends & extensions
Outer
clamp
Boiler
Fig. 7
FITTING THE HORIZONTAL FLUE KIT
Carefully measure the distance from the centre
of the appliance flue outlet to the edge of the finished outside wall (dimension X). Add 45mm to
dimension X to give you dimension Y (see fig 7A).
Measure dimension Y from the terminal end of
the concentric flue pipe and cut off the excess
ensuring any burrs are removed. Pass the concentric flue pipe through the previously drilled hole.
Fit the flue bend to the boiler flue outlet and insert
the concentric flue pipe into the flue bend ensuring the correct seal is made.
9
Using the clamp, gasket and screws supplied, secure the flue bend to the appliance flue spigot.
The 60mm M & F adaptor (supplied with the flue
kit) should be discarded.
NOTE
Fit the internal trim to the flue assembly prior to
connecting the flue pipe to the bend.
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 exterior trim can now be fitted.
plain end of the extension (see fig. 7 & 8). Remove
any burrs, and check that all seals are located
properly.
You must ensure that the entire flue system is
properly supported and connected.
eal 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.
4.5.2
CONCENTRIC VERTICAL FLUE
The appliance can be used with either the Vokera
condensing 60/100mm concentric flue system or
the optional 80/125mm concentric flue system.
NOTE
These instructions relate only to the Vokera
condensing 60/100mm concentric flue system.
For specific details on the installation of the 80/
125mm concentric flue system please refer to the
instructions supplied.
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 4.4.2), however if
additional bends are fitted, a reduction must be
made to the maximum flue length (see table below).
Reduction for bends
Fig. 7A
“Y” = “X” + 45 mm
Bend
45° bend
4.5.1.1 EXTENDING THE FLUE
Connect the bend - supplied with the terminal kit to the top of the boiler using clamp (supplied) see
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 (see fig.
7 & 8).
The flue system should have a 1º rise from the
boiler to outside, to ensure any condense fluid that
forms, is allowed to drain back to the appliance.
NOTE
When cutting an extension to the required length,
you must ensure that the excess is cut from the
Fig. 8
10
90° bend
Reduction in maximum flue length for each
bend
0.5 metre
1.0 metre
Vertical flue terminal and accessories
Part No.
Description
0225725
Vertical flue terminal
1.0 metre
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
Min-Max length
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 may
form in the flue system to drain via the condensate drain. Consideration must also be given to
the fact that there is the possibility of a small
amount of condensate dripping from the terminal.
• Ensure that the entire flue system is adequately
supported, use at least one bracket for each
extension.
• The entire flue system must be adequately
insulated to maintain heat within the flue system
thereby reducing the possibility of condensate
production.
• As the exhaust outlet pipe can reach very high
temperatures it must be protected to prevent
persons touching the hot surface.
• The condensate drain pipe must be connected in
accordance with building regulations.
Using the dimensions given in fig. 9 as a reference, mark and cut a 115mm hole in the ceiling
and/or roof.
300 mm minimum
520 mm
Fig. 9
218 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.
IMPORTANT
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.
Connect the vertical flue assembly to the boiler
flue spigot using the 60mm & 100mm clips,
gaskets & screws (supplied), ensuring the correct
seal is made. The flue support bracket (supplied
with the vertical flue kit) can now be fitted.
If the vertical flue requires extension/s or additional bend/s, connect the required number of flue
extensions or bends (up to the maximum equivalent flue length) between the boiler and vertical flue
assembly (see fig. 8).
Ensure that any horizontal sections of the flue
system have a 1º fall back to the boiler (17mm per
1000mm).
NOTE
When cutting an extension to the required length,
you must ensure that the excess is cut from the
plain end of the extension (see fig. 8). Remove
any burrs, and check that any seals are located
properly.
You must ensure that the entire flue system is
properly supported and connected.
4.5.3
TWIN FLUE SYSTEM
The Vokera twin flue system enables greater flue
distances to be achieved (see 4.4.2) than that of
a concentric flue system. It can be used for
Reduction for bends
Bend
Reduction in maximum flue length for each
bend
45° bend
90° bend
1.0 metre
1.0 metre
Twin flue accessories
Part No.
Description
Length
0225805
Horizontal flue terminal
1.0 metre
0225810
Vertical flue terminal
1.0 metre
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. 10
& 11)
• Insert the exhaust connection manifold (A) onto
the appliance flue outlet.
11
• Remove the blanking plate (located to the right
of the appliance flue outlet) and - using the same
screws - install the air inlet plate (B).
• Using the hole in the exhaust connection manifold as a guide, drill a 3mm hole in the appliance
flue spigot and secure the exhaust manifold
connection to the flue spigot using the screw
provided (C).
• Using the two holes in the air inlet plate as a
guide, drill a 3mm hole in each and secure the air
inlet pipe/bend using the screws provided.
• The twin flue pipes extensions and accessories
can now be installed by pushing together (the
plain end of each extension or bend should be
pushed approximately 50mm into the female
socket of the previous piece).
Fig. 10
C
A
Fig. 11
B
4.5.3.2 HORIZONTAL TERMINATION (see fig. 12)
The twin flue system must be converted to the
dedicated concentric flue kit for termination.
• The horizontal terminal is supplied with a built-in
converter box and cannot be shortened.
• A 130mm hole is required for the passage of the
concentric terminal through the wall.
• The air inlet pipe must always be level with or
below, that of the exhaust pipe.
Depending on site conditions it may be preferable
to install the terminal assembly prior to fitting the
twin flue pipes.
Mark and drill a level 130mm hole for the passage
of the horizontal flue terminal. 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 50mm
onto the male spigots of the concentric to twin
converter.
NOTE
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 (see fig. 13)
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 130mm hole is required for the passage of the
concentric terminal through the ceiling and/or
roof.
Fig. 12
12
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
50mm onto the male spigots of the concentric to
twin converter.
Fig. 13
• You must ensure that the entire flue system is
properly supported and connected.
• Ensure that any horizontal sections of pipe have
a 1º fall towards the appliance (17mm per
1000mm).
4.6
CONNECTING THE GAS AND WATER
The appliance is supplied with service valves. The
service valves are of the compression type. The
accessories pack contains sealing washers etc,
for use with the service valves. 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)
The appliance is supplied with a 15mm service
valve, connect a 15mm pipe to the inlet of the
valve and tighten both nuts.
NOTE
It will be necessary to calculate the diameter of the
gas supply pipe to ensure the appliance has an
adequate supply of gas.
4.6.2
FLOW & RETURN (fig. 6)
The appliance is supplied with 22mm service
valves for the flow and return connections, connect a 22mm pipe to the inlet of each valve and
tighten both nuts.
NOTE
Depending on system requirements, it may necessary to increase the size of the flow & return
pipe work after the service valve connections.
4.6.3
SAFETY VALVE (fig. 6)
Connect the safety valve connection pipe to the
safety valve outlet. Connect a discharge pipe to
the other end of the safety valve connection pipe
and tighten. The discharge pipe must have a
continuous fall away from the appliance to outside
and allow any water to drain away thereby eliminating the 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.
4.6.4
CONDENSE PIPE
During normal operation the boiler produces condense which is collected in a trap located in the
lower part of the boiler. A flexible pipe (condense
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 condense outlet pipe down from its
location inside the boiler until approximately 200mm
protrudes from the underside of the boiler. Connect a suitable plastic (not copper) pipe (no less
than 20mm diameter) to the outlet pipe and ensure
it discharges in accordance with building regulations or other rules in force.
13
4.7
4.7.1
ELECTRICAL CONNECTIONS
The electrical supply must be as specified in section 3/3A. 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 0.75mm
to BS 6500 or equivalent. Wiring to the appliance
must be rated for operation in contact with surfaces up to 90ºC.
CASING REMOVAL
To gain internal access to the appliance you must
first remove the casing, proceed as outlined below:
• locate and remove the 2 transit screws (C)
• remove the 2 screws (B) located at the Left &
Right of the underside of the casing
• lift the casing upward to disengage it from the top
locating hooks and then remove
• store the casing and screws (B) safely until
required. Re-fit in the reverse order
• use on of the discarded transit screws to secure
the cover to the boiler.
C
B
Fig. 14
B
cover
A
Mains (230V)
terminal block
Optional devices
(24V) terminal block
Fig. 15
14
link wire
ME3
ME6
Fig. 16
4.7.2
APPLIANCE TERMINAL BLOCK
The appliance terminal block is located on the rear
of the control fascia. Remove the casing as
described in 4.7.1. Lift the control fascia upward
and lower it. Locate the terminal block covers (see
fig. 15).
NOTE
The appliance comes with a factory fitted link to
allow basic operation of the boiler via the mode
selector switch. If it is anticipated that external
controls will be required please refer to the wiring
diagrams in section 8 for more detailed information.
4.7.3
CONNECTING THE MAINS (230V) INPUT (see
fig. 16)
Locate and remove the screw securing the right
terminal block cover (230V). Pass the cable through
the cable anchorage point.
Connect the supply cable wires (LIVE, and NEUTRAL) to their corresponding terminals on the
appliance terminal block. Connect the EARTH
wire to the EARTH block (see fig. 16) ensuring that
it’s 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 unless additional
external controls are to be fitted (see section 8).
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.
The appliance casing, screws and lower cover can
now be re-fitted.
SECTION 5
COMMISSIONING
5.1
GAS SUPPLY INSTALLATION
Inspect the entire installation including the gas
meter, test for soundness and purge. Refer to BS
6891 for specific instruction.
5.2
THE HEATING SYSTEM
The appliance contains components that may
become damaged or rendered inoperable by oils
and/or debris that are residual from the installation
of the system, consequently it is essential that the
system be flushed in accordance with the following instructions.
5.3
INITIAL FILLING OF THE SYSTEM
Ensure both flow and return service valves are
open, remove appliance casing as described in
4.7.1, identify the automatic air release valves
(AAV) and loosen the dust cap/s by turning the cap
anti-clockwise one full turn.
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.
Connect the filling loop as shown in fig. 5, slowly
proceed to fill the system by firstly opening the
inlet valve connected to the flow pipe, and then
turning the lever on the fill valve, to the open
position. As water enters the system the pressure
gauge will begin to rise. Once the gauge has
reached 1 BAR close both valves and begin
venting all manual air release valves, starting at
the lowest 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
INITIAL FLUSHING OF THE SYSTEM
The whole of the heating system must be flushed
both cold and hot as detailed in 5.8. Open all
radiator or heating valves and the appliance flow &
return service valve. Drain the boiler and system
from the lowest points Open the drain valve full
bore to remove any installation debris from the
boiler prior to lighting. Refill the boiler and heating
system as described in 5.3.
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 7.8) 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.
5.6
INITIAL LIGHTING
Ensure the electrical supply to the appliance is
switched on. Press the ON/OFF switch to switch
the appliance ON (indicated by active display),
ensure any external controls are switched to an
‘ON’ position and are calling for hea.
Press the function button and select “Winter mode”,
the appliance will now operate in the “Winter mode”
as described in 1.2. Should the appliance fail to
ignite, refer to 5.6 and/or section 7 (mode of
operation, parameter setting, & faultfinding).
5.7
CHECKING GAS PRESSURE AND COMBUSTION ANALYSIS
The appliance is factory set and should require no
additional adjustment once installed. However, if
the gas valve has been adjusted, or the appliance
has been converted for use with another gas type,
then it’s necessary to carry out a combustion
analysis/check to ensure that correct combustion
is occurring. Details on how to carry out the
combustion analysis can be found in section 7.
IMPORTANT
It’s imperative that a sufficient dynamic - gas pressure is maintained at all times. Should the
dynamic gas pressure fall below an acceptable
level, the appliance may malfunction or sustain
damage.
5.8
FINAL FLUSHING OF THE HEATING SYSTEM
The system shall be flushed in accordance with
BS 7593. Should a cleanser be used, it must be
suitable for Copper and Aluminium heat exchangers. It shall be from a reputable manufacturer and
shall be administered in strict accordance with the
manufacturers’ instructions and the DWTA code
of practice.
5.8.1
INHIBITORS
See Section 3 “General Requirements”.
5.9
SETTING THE BOILER OPERATING TEMPERATURE
The flow outlet temperature can be adjusted between 20 °C - 80 °C via the Heating thermostat
knob (see fig.1).
Fig. 17
5.9.1
INFORMATION MODE
The appliance keypad can be used to display
certain information on the working status of the
boiler. Push the Info button ( ) to enter the info
menu (fig. 17).
15
To lower the system pressure to the required
value, drain off some water from the appliance
drain valve until the required figure registers on the
pressure gauge (see fig. 1).
The following information are shown pushing subsequently the button:
Info 1 N/A
Info 2 water pressure (fig. 18)
5.11
REGULATING THE CENTRAL HEATING SYSTEM
Fully open all radiator and circuit valves and run
the appliance for both heating and hot water until
heated water is circulating. If conditions are warm
remove any thermostatic head. Adjust radiator
return valves and any branch circuit return valves
until the individual return temperatures are correct
and are approximately equal.
5.12
FINAL CHECKS
● ENSURE ALL TEST NIPPLES ON THE APPLIANCE GAS VALVE ARE TIGHT AND CHECKED
FOR 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 BENCHMARK CHECKLIST.
Fig. 18
Info 3 CH temperature set (fig. 19)
FOR UK ONLY
Complete details of the boiler, controls, installation and commissioning in the Benchmark checklist at the back of this book. It is important that the
Benchmark checklist is correctly completed and
handed to the user. Failure to install and commission the appliance to the manufacturers instructions may invalidate the warranty.
Fig. 19
Info 4 N/A.
5.9.3
INFORMATION MODE SERVICE
Push and hold for 10 seconds the Info button ( )
to enter the info menu service (INF2 is shown on
the display). The following information are shown
pushing subsequently the button:
Step number
01
02
03
04
05
06
07
FAN
09
10
5.9.4
5.10
16
Information displayed
Temperature at flow sensor °C
Temperature at return sensor °C
Unused
Unused
Unused
Unused
Unused
Fan speed RPM/100
Unused
Unused
ADJUSTING APPLIANCE PARAMETERS
The appliance is delivered with pre-set parameters. Some parameters can be changed or adjusted if required. For further details, please refer
to section 7.
SETTING THE SYSTEM DESIGN PRESSURE
The design pressure should be a minimum of 0.5
BAR and a maximum of 1.5 BAR.
The actual reading should ideally be 1 BAR plus
the equivalent height in metres (0.1 BAR = 1
metre) to the highest point in the system above the
base of the 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.
5.13
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 any 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.
Explain to the user that for continued safe and
efficient operation, the appliance must be serviced annually by a competent person.
IMPORTANT
To validate the appliance warranty, it’s necessary
to register the appliance details with us.
The warranty can be registered in several ways:
● by completing the warranty registration card and
posting to us using the pre-paid envelope supplied
● online at: vokera.co.uk
● for UK residents by calling: 0870 607 0281
● for ROI residents by calling: 1850 221121.
SECTION 6
6.1
6.2
6.3
6.4
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.
To ensure correct and safe operation of the appliance, it is essential that any worn or failed component be replaced only with a genuine Vokera
spare part. It should be remembered that although
certain generic components may look similar,
they will be specific to an individual appliance or
product range. Use of non-genuine Vokera spare
parts could invalidate your warranty and may pose
a potential safety hazard. The frequency of servicing will depend upon the particular installation
conditions, but in general, once per year should be
sufficient. 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,
CORGI registered personnel or other suitably
qualified personnel.
The following instructions apply to the appliance
and its controls, but it should be remembered that
the central heating and the domestic hot water systems would also require attention from time to time.
ROUTINE ANNUAL SERVICING
● Check the operation of the appliance and ensurit
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 - all burner
pressure settings (see 7.4).
● Check and adjust - if necessary - the system
design pressure (see 5.10).
● Carry out an analysis of the flue gases (see 7.5)
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.
● Check that the burner and main heat exchanger
are clean and free from any debris or obstruction.
complete commissioning check as detailed in
section 5, after replacing any component. ALWAYS TEST FOR GAS SOUNDNESS IF ANY
GAS CARRYING COMPONENTS HAVE BEEN
REMOVED OR DISTURBED.
6.4.1
clips
Fig. 20
6.5
PUMP ASSEMBLY (fig. 21)
Carry out component removal procedure as described in 6.4. Locate and remove the 2 securing
screws (A) at the rear of the pump assembly.
Disconnect the flow pipe (B) from the combustion
chamber connection, slacken the pipe at the
hydraulic assembly and swing/rotate clear of the
pump assembly. Disconnect and remove the pump
outlet pipe (C) from the pump assembly/combustion chamber connection. Remove the expansion
pipe locking pin (D) from the top of the pump
assembly and withdraw the flexible pipe. Disconnect the electrical wiring from the pump’s electrical connection point (E). Remove locking pin (F)
from pump base and lift pump assembly clear of
the hydraulic manifold. The pump assembly can
now be removed from the appliance. Replace
carefully in the reverse order.
H
I
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.
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 4.7.1 and drain the water
content from the appliance via the drain valve.
Ensure some water absorbent cloths are available
to catch any residual water that may drip from the
appliance or removed component. Undertake a
AIR BOX FRONT COVER REMOVAL (fig. 20)
Locate the two clips and remove air box front
cover. If necessary to remove the air box side
cover, locate and remove the 4 screws.
G
D
A
C
E
B
Fig. 21
6.6
F
SAFETY VALVE (fig. 23)
Carry out component removal procedure as described in 6.4. Disconnect the outlet pipe (A) from
the safety valve, remove safety valve locking pin
(B) from the hydraulic manifold. Replace in the
reverse order.
17
6.7
BOTTOM AUTOMATIC AIR RELEASE VALVES
(fig. 21)
Carry out component removal procedure as described in 6.4. Remove the expansion pipe locking
pin (D) from the pump assembly and remove the
expansion pipe. Locate and remove the AAV locking pin (G) from the pump assembly and remove the
AAV assembly (H). Replace in the reverse order.
6.7.1
TOP AAV (fig. 22)
Carry out component removal procedure as described in 6.4.
Remove the drain pipe (A). Unscrew the top AAV.
Replace in the reverse order. Loctite or similar
should be used as a thread sealant for the AAV.
A
B
A
Fig. 24
6.12
Fig. 22
6.8
WATER PRESSURE SENSOR/GAUGE (fig. 23)
Carry out component removal procedure as described in 6.4. Locate and remove the locking pin
(C) from the water pressure sensor/gauge assembly. Remove the wiring. Carefully withdraw the
assembly. Replace in the reverse order.
B
A
GAS VALVE (fig. 25)
Carry out component removal procedure as described in 6.4. The gas valve must be changed as
complete unit. Disconnect the electrical plug and
leads from the gas valve, slacken and unscrew
gas valve inlet and outlet connections. Please
note, the sealing washers (B) must be discarded
and replaced with new sealing washers. Disconnect the compensation pipe (C). Locate and remove gas valve retaining screws (D) on the underside of the boiler if required, the gas valve can now
be removed. Replace in the reverse order. Check
and adjust burner pressure settings.
WARNING, A GAS SOUNDNESS CHECK MUST
BE CARRIED OUT.
6.12.1 INJECTOR (fig. 25)
Carry out component removal procedure as described in 6.4. Unscrew and remove gas pipe
connections (A & E). Locate and remove the
injector (F) inside the pipe. Replace in the reverse
order. Check and adjust burner pressure settings.
WARNING, A GAS SOUNDNESS CHECK MUST
BE CARRIED OUT.
C
Fig. 23
6.9
6.10
6.11
18
A
PRIMARY THERMISTOR (fig. 1)
Carry out component removal procedure as described in 6.4. Unclip and remove the air chamber
front cover. Unclip the primary thermistor from the
flow outlet pipe. Disconnect thermistor electrical
plug. Replace in the reverse order.
RETURN THERMISTOR (fig. 1)
Carry out component removal procedure as described in 6.4. Unclip and remove the air chamber
front cover. Unclip the return thermistor from the
return inlet pipe. Disconnect thermistor electrical
plug. Replace in the reverse order.
PRINTED CIRCUIT BOARD (fig. 24)
Carry out component removal procedure as described in 6.4. Lift the control fascia upward and rotate
it. Locate and remove the screws (A) which secure the
PCB cover, push the clips (B) and remove cover, after
carefully taking note of all wiring connections, disconnect all wiring from the PCB, locate and remove the
PCB securing screws, remove the required PCB.
Replace in the reverse order.
F
E
B
D
C
Fig. 25
6.13
B
ELECTRODE & CONDENSE SENSOR (fig. 26)
Carry out component removal procedure as described in 6.4.
Unclip and remove the air chamber front and RH
side covers. Disconnect the electrode lead and
ancillary wiring from their respective connectors.
Remove the 2 retaining screws (A) for electrode
(B) and remove. Remove the retaining nut (C) for
condense sensor (D) and remove.
connections on the heat exchanger. Locate and
remove the 4-screws that secure the heat exchanger to the combustion chamber (D). Move the
heat exchanger to the right and disconnect it from
the flue collector (E). The heat exchanger can now
be lifted up and withdrawn from the appliance.
Fig. 30: To remove the fan burner assembly (A)
locate and remove the 3 external nuts (B).
Replace in the reverse order. Ensure all seals are
in good condition, taking care to ensure they are
replaced correctly.
B
A
D
C
Fig. 28
Fig. 26
6.14
FLUE FAN & MIXER (fig. 27)
Carry out component removal procedure as described in 6.4.
Unclip and remove the air chamber front and the
RH side covers. Slacken the gas pipe (A) at the air
box connection and swing/rotate of the fan assembly. To remove the mixer (B) locate and remove
the three screws (C). To remove the fan (D),
disconnect the electrical connections attached to
the fan, locate and remove the four screws (E).
Gently ease the fan from its location.
Replace in the reverse order. Ensure all seals are
in good condition, taking care to ensure they are
replaced correctly.
E
D
F
C
B
A
Fig. 29
B
B
C
A
A
E
D
D
C
Fig. 27
6.15
6.16
E
BURNER (fig. 28)
Carry out component removal procedure as described in 6.4.
Unclip and remove the air chamber front and the
RH side covers. Slacken the gas pipe (A) at the air
box connection and swing/rotate of the fan assembly. Locate and remove the 3 internal nuts (B)
which secure the fan assembly in position (C) to
the heat exchanger (D). Gently ease the fan
assembly out of its location. Once the assembly
has been removed, the burner (E) can be withdrawn from the heat engine. Ensure the seal (F) is
in good condition, taking care to ensure it is
replaced correctly. Replace in the reverse order.
MAIN HEAT EXCHANGER (fig. 29 & 30)
Carry out component removal procedure as described in 6.4. Unclip and remove the three air
chamber covers (front, LH, RH sides). Disconnect
all the wiring connections.
Fig. 29: Slacken the gas pipe (A) at the air box
connection and swing/rotate of the fan assembly.
Disconnect the flow (B), return (C) and condense
A
B
Fig. 30
6.17
AUTOMATIC BY-PASS & DHW NON-RETURN
VALVE (fig. 31)
Carry out component removal procedure as described in 6.4.
Remove the locking pin (A) that secures the cover
(B) to the hydraulic manifold. Using a hooked
piece of wire, carefully withdraw the by-pass
cartridge (C) and/or DHW non-return cartridge (D).
Ensure all seals are in good condition, taking care
19
6.18
to ensure they are replaced correctly. Replace in
the reverse order ensuring the cartridge is facing
the correct way.
EXPANSION VESSEL (fig. 1)
Should the removal and replacement of the expansion vessel be deemed impractical, an external
expansion vessel may be fitted to the return pipe
as close to the appliance as possible.
A
D
Fig. 33
6.20
D
C
B
Fig. 31
6.18.1 EXPANSION VESSEL REMOVAL (with sufficient clearance above, fig. 32)
Carry out component removal procedure as described in 6.4.
Disconnect the flue from the appliance. Disconnect the expansion vessel from the flexible expansion pipe. Disconnect the flexible expansion pipe
from the vessel. Unscrew the nut that secures the
vessel to the frame. Locate and remove the 6
screws (A) that secure the vessel top holding plate
(B), remove the plate. The expansion vessel can
now be removed. Replace in the reverse order.
Ensure all seals are in good condition, taking care
to ensure they are replaced correctly.
CONDENSE TRAP REMOVAL (fig. 34)
Carry out component removal procedure as described
in 6.4. Disconnect the 2 upper rubbers condense pipe
(A). Remove the pin (B) that secures the trap to the air
box plate. Disconnect the lower rubber condense pipe
(C) from the condense trap. Carefully remove the
condense trap. Replace in the reverse order.
A
A
B
C
Fig. 34
B
6.21
Fig. 32
6.19
20
FAN TRANSFORMER REMOVAL (fig. 33)
Carry out component removal procedure as described
in 6.4. Unclip and remove the air chamber front and left
side covers. Disconnect the fan transformer wiring.
Locate and remove the 2 screws (D) that secure the fan
transformer to the air box plate, cut the two cable ties
previewed on heat-shrinkable insulators that protect the
transformer connectors. Unthread the heat- shrinkable
insulators. Carefully remove the fan transformer. Replace in the reverse order.
ATTENTION
The transformer connected, put the heat-shrinkable insulators and fix it thorugh two new calbe
ties. The heat-shrinkable insulators assure the
correct protection from liquid penetration of transformer connector.
Fig. 35
FLUE COLLECTOR REMOVAL (fig. 35)
Carry out component removal procedure as described in 6.4. Unclip and remove the air chamber
front and left side covers. Locate and remove the
screw (A) that secures the flue gas analysis test
point cover (B). Gently pull down and to the left and
ease the flue collector from its location. Replace
in the reverse order.
B
A
SECTION 7
7.1
7.2
CHECKS, ADJUSTMENTS AND FAULT FINDING
CHECKING APPLIANCE OPERATION
When carrying out any repairs or servicing to the
appliance, the relevant commissioning procedure
must be undertaken to ensure the continued safe
operation of the appliance. Particular attention
should be made to ensure gas soundness, water
soundness, and the electrical integrity of the
appliance.
APPLIANCE MODES OF OPERATION
NOTE
There must be sufficient system water pressure
(min. 0.5 bar) to ensure the water pressure switch
is activated. If there is insufficient system pressure the pump and fan will be prevented from
operating and the low-pressure fault indicator will
be displayed.
7.2.1
SELECTOR SWITCH IN THE STANDBY POSITION
When the selector switch is in the STANDBY
position, the following functions are active.
Active functions:
● frost-protection system
● pump anti-block.
7.2.2
BOILER “ON” IN COMFORT MODE
When the function switch is in the Comfort position, the relevant status indicators (see fig. 1A) are
displayed and the appliance is active for heating
and/or hot water requests.
Active functions:
● frost-protection system
● pump anti-block
● SARA booster function.
7.2.3
BOILER “ON” IN ECONOMY MODE
When the function switch is in the Economy
position, the relevant status indicators (see fig.
1A) are displayed and the appliance is active for
heating and/or hot water requests.
Active functions:
● frost-protection system
● pump anti-block
● SARA function.
7.2.4
APPLIANCE FUNCTIONS
● SARA: this function will automatically raise the
outlet flow temperature when the heating temperature selector is in the 55-65°C range, if the
appliance is unable to reach the room temperature set with room thermostat.
● SARA Booster function: this function will automatically raise the flow outlet temperature if/
when the appliance is unable to reach or maintain the desired flow outlet temperature.
● Frost-protection: this function is only active
when there are no requests for heating or HW.
Should the temperature of the primary thermistor drop below 7°C, the valve actuator will motor to the heating position. Should the temperature of the primary thermistor exceed 10°C during this period, the cycle will be aborted. If the
●
7.2.5
temperature drops below 4°C, the boiler will operate on minimum power until the temperature
of the primary thermistor reaches 30°C. Thereafter the pump & fan will over-run for 30-seconds.
Pump anti-block cycle: when there has been
no heating or HW request for 24-hours, the antiblock cycle is activated. The pump will be
activated for a period of 1- minute. If the selector
switch is in the Comfort or Economy position,
the fan will also be active for 1- minute.
HEATING MODE
With the selector switch in the Comfort or Economy
position and any additional controls (time clock,
room thermostat, etc,) calling for heat, the appliance will operate in the heating mode.
The pump and fan will be activated via the flow
temperature sensor. When the fan is sensed to be
operating correctly, the ignition sequence commences. Ignition is sensed by the electronic
circuitry to ensure flame stability at the burner.
Once successful ignition has been achieved, the
electronic circuitry allows 75% 0f the full gas rate
through the appliance. After 15 minutes (adjustable, see parameter 28, cap. 7.3.1) the gas rate is
increased to maximum (100%). The speed of the
fan and therefore the output of the boiler is determined by the temperature of the water sensed by
the flow temperature sensor, 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 pipe
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 5 minutes). When the temperature of the
flow sensor falls below the setpoint,the burner will
re-light.
NOTE
If the spark/sensing electrode does not sense
ignition the appliance will re-attempt ignition a
further 4-times then go to lockout.
When the set-point has been reached (the position
of the heating temperature selector) as measured
at the primary thermistor, the appliance will begin
the modulation phase whereby the fan and gas
valve will continuously modulate to maintain the
set-point.
If the temperature continues to rise and exceeds
the set-point by 6°C, the burner will shut down. A
new ignition sequence will be enabled when the 5minute anti-cycle has been performed and the
temperature at the primary thermistor has dropped
6°C below the set-point.
21
NOTES
When the request for heating and/or hot water has
been satisfied, the appliance pump and fan may
continue to circulate to dissipate any residual heat
within the appliance.
Fig. 36
7.3
MODE
INFO
SERVICE MODE & PARAMETERS
To check or adjust the service parameters you
must first access the service mode. This mode is
only accessible in OFF mode. To access the
service mode: push INFO and MODE buttons at
the same time for 10 seconds to enter the adjusting menu. The display shows “CodE” (see fig. 36).
Push MODE button and select the service parameters code by turning the RH (right-hand) encoder
and confirm it by pushing MODE button.
Parameter value
Isolate the appliance from the electrical supply
and remove the appliance casing as described in
4.7.1. Set the flue gas analyser to read CO2 and
insert the probe into the flue analysis test point (A,
B fig. 35). Restore the electrical supply to the
boiler and switch on the boiler. To adjust the gas
valve you must first access the adjusting mode.
This mode is only accessible in STANDBY mode.
To access the adjusting mode: push INFO and
MODE buttons at the same time for 10 seconds to
enter the adjusting menu. The display shows
“CodE” (see fig. 36). Push MODE button and
select the adjust parameters password by turning
the RH (right-hand) encoder and confirm it by
pushing MODE button. The following functions are
available in this mode.
Parameter number
7.4.1
GAS TYPE SETTING - 1
Select the parameter 1 by turning the RH (righthand) encoder; push MODE button, it is possible
to set gas type: 1(natural gas) - 2 (LPG), by turning the RH (right-hand) encoder. Push MODE button to store the gas type selected.
ATTENTION
Gas type and boiler output must be according to
the boiler design specification. Vokera accepts no
responsibility if the gas type and boiler output are
set not according to the appliance specification.
7.4.3
ABSOLUTE MAX FAN SPEED - HP
Select the parameter HP by turning the RH (righthand) encoder; push MODE button, it is possible
to set the absolute max fan speed that is related
to gas type and boiler output. Modify this parameter only if strictly necessary. The value is shown
on the display as rpm/100 (i.e. 3600/100 = 36). The
set value automatically modifies the max value of
parameter 23.
7.4.4
ABSOLUTE MIN FAN SPEED - LP
Select the parameter LP by turning the RH (righthand) encoder; push MODE button, it is possible
to set the absolute min fan speed that is related to
gas type and boiler output. Modify this parameter
only if strictly necessary. The value is shown on
the display as rpm/100 (i.e. 3600/100 = 36). The
set value automatically modifies the min value of
parameter 24.
7.4.5
START-UP FAN SPEED - SP
Select the parameter SP by turning the RH (righthand) encoder; push MODE button, it is possible
to set the start-up fan speed. Modify this parameter only if strictly necessary. The value is shown
on the display as rpm/100 (i.e. 3600/100 = 36).
7.4.6
GAS VALVE MAXIMUM SETTING - HH
Select the HH parameter by turning the RH (righthand) encoder; the boiler starts at the maximum
power, the CO2 reading should be as shown in the
table below (for LPG see 9.2).
Fig. 37
7.3.1
Par.
01
HP
LP
SP
HH
LL
MM
7.4
22
PARAMETERS SETTING
Turn the RH (right-hand) encoder to display all
parameters and their values (see fig. 37). When
the required parameter is displayed, push the
MODE button, the current (parameter) value will
flash. To change the parameter value, rotate the
RH (right-hand) encoder until the required value is
displayed, push the MODE button to store the new
value. To exit the service mode push INFO button.
Action
set gas type
max fan speed
min fan speed
start-up fan speed
force burner to max power
force burner to min power
force burner to medium power
ADJUSTING MODE & ADJUSTING THE GAS
VALVE
THE GAS VALVE MUST BE SET-UP OR ADJUSTED WITH THE AID OF A PROPERLY CALIBRATED FLUE GAS ANALYSER.
If the CO2 reading is correct, pass to gas valve
minimum setting (7.4.7). 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 (see fig. 38) - clockwise to decrease, counter clockwise to increase
- until the correct value is displayed on the CO2
analyser (allow time for the analyser to stabilise).
7.6
CHECKING THE EXPANSION VESSEL
Carry out the component removal procedure as
described in 6.4. You must ensure that the boiler
is completely drained of water.
Using a 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.
NOTE
You must ensure the drain valve is in the open
position whilst re-charging takes place. Replace
the dust cap and carry out the relevant commissioning procedure (section 5).
7.7
EXTERNAL FAULTS
Before carrying out any faultfinding or component
replacement, ensure the fault is not attributable to
any aspect of the installation.
7.7.1
INSTALLATION FAULTS
IMPORTANT
A GAS SOUNDNESS CHECK MUST BE CARRIED OUT.
Maximum
screw
Compensation
pipe connection
Minimum
screw
Fig. 38
7.4.7
GAS VALVE MINIMUM SETTING - LL
Select the LL parameter by turning the RH (righthand) encoder. The boiler starts at the minimum
power, the CO2 reading should be as shown in the
table above.
If the CO2 reading is correct, pass to gas valve
final setting (7.4.8). 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 (see fig. 38) - clockwise to increase, counter clockwise to decrease
- until the correct value is displayed on the CO2
analyser (allow time for the analyser to stabilise).
7.4.8
GAS VALVE FINAL SETTING - MM
Select the MM parameter by turning the RH (righthand) encoder, the boiler starts at the medium
power and it is possible to change the power of the
boiler turning the CH temperature control in order
to check the CO2 in the overall range of the boiler.
7.4.9
MINIMUM OUTPUT CH (FAN SPEED) - 24
Select the parameter 24 by turning the RH (righthand) encoder. Push MODE button, it is possible
to modify the minimum fan speed by turning the
RH (right-hand) encoder. Push MODE button to
store the value.
7.5
COMBUSTION ANALYSIS TEST
A combustion analysis check can easily be carried out on the appliance via the test points located
on the top of the appliance, however you must
check that the CO2 values are set correctly (see 7.4).
● Insert the flue gas analyser probe into the flue
gas test point (see fig. 35).
● Operate the boiler in HH - LL and compare the
values with those shown in 7.4.6. If different
adjust the gas valve according to 7.4.6. and
7.4.7.
Symptom
No display/
ignition
No hot water
No heating
Possible causes
Check wiring.
Check electrical supply
Check external controls
Check external controls
Fault code
10
Possible causes
Check gas supply, check flue system,
check polarity.
Debris in flue system.
Check system pressure, check for air in boiler/
system.
Check service valves, check pump, check
external zone valves.
30
40
70/72/74
7.8
ELECTRICAL CHECKS
Any electrical checks must be carried out by a
suitably qualified person.
7.8.1
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.
7.8.2
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 terminal strip (fig.17).
Repeat above test on the Live & Earth connections at the appliance terminal strip (fig.17).
NOTE
Should it be found that the 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.
23
7.8.3
7.8.4
Code
11
12
13
23
25
27
31
35
36
41
60
71
77
78
93
95
7.8.5
7.9
24
POLARITY CHECK
With the appliance connected to the electrical
supply and using a suitable multimeter, carry out
the following voltage tests:
● connect test leads between the Live & Neutral
connections at the appliance terminal strip (fig.17).
The meter should read approximately 230V ac.
If so proceed to next stage. If not, see 7.8.4.
● connect test leads between the Live & Earth
connections at the appliance terminal strip (fig.17).
The meter should read approximately 230V ac.
If so proceed to next stage. If not, see 7.8.4.
● connect test leads between the Neutral & Earth
connections at the appliance terminal strip (fig.17).
The meter should read approximately 0 - 15Vac.
If so polarity is correct. If not, see 7.8.4.
REVERSED POLARITY OR SUPPLY FAULT
Repeat the above tests at the appliance isolator,
if testing reveals correct polarity and/or supply at
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.
Reason
false flame
restart ignition
check the wiring harness
check the wiring harness
high limit flow temperature probe
high limit return temperature probe
internal fault
fan error
internal fault
low water pressure
DHW NTC error
flow NTC error (2nd CH)
over heat underfloor thermostat (2nd CH)
flow/return ∆T error (2nd CH)
condensate level high
condensate sensor error
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 terminal
strip (fig. 17). 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.
These series of checks must be carried out before
attempting any faultfinding 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.
FAULT FINDING
Before attempting any faultfinding, the electrical
checks as detailed in 7.8 must be carried out.
Isolate the appliance from the electrical supply.
Disconnect any external controls from terminal
plug M6 (fig. 39) and insert a link-wire between the
two Black wires at terminal plug M6 (fig. 39).
NOTE
Restore the electrical supply to the boiler and turn
the selector switch to the on position. The boiler
should now function as described in section 7.2.
Should the boiler fail to respond, the internal fuses
and connectors should be checked to ensure integrity and continuity. If the boiler still fails to
respond, refer to the detailed faultfinding flowcharts
overleaf.
7.10
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. When the boiler displays a temporary fault
code, the appropriate code is shown flashing on
the display, accompanied by the symbol
.
7.11
FINAL FAULT CODES
When the boiler displays a final fault code, the
appropriate code is shown flashing on the display,
(RESET).
accompanied by the symbol
Code
Reason
10
14
15
20
21
22
24
26
28
29
30
33
34
37
38
40
42
50-59
70
72
74
79
80-83
92
94
no flame detected
check the wiring harness
false flame
high limit thermostat/burner
check the wiring harness
check the wiring harness
high limit flow temperature probe
high limit return temperature probe
flow/return ∆T error
check the wiring harness
wrong parameter from the factory
fan error (low rpm)
fan error (start-up)
fan error (high rpm)
wrong parameter from the factory
low water pressure
pressure transducer fault
internal PCB failure
flow NTC error (2nd CH)
return NTC error (2nd CH)
flow temperature too high /flow sensor error (2nd CH)
flow/return ∆T error (2nd CH)
internal fault
condensate level high
condensate sensor error
7.11.1 CODE ERROR +
(RESET) ONLY
To reset the boiler, push
button. If the boiler
starts without any problems, the lock-out is probably due to an accidental situation.
(RESET) +
7.11.2 CODE ERROR +
Refer to the following section and the detailed fault
finding flowcharts overleaf.
FAULT CODES 1x
Fault codes 1x appear when the burner has failed to ignite or the
flame supervisione system has failed to detect a flame.
● Check incoming gas supply
● Check spark electrode
● Check polarity
● Check integrity of flue system
● Check gas valve
● Check ignition control PCB
FAULT CODES 2x
●
Check wirings
FAULT CODES 3x
Fault codes 3x appear if the boiler or flue system has developed
a fault.
● Check operation of fan
● Check flue system
FAULT CODES 4x
Fault codes 4x appear if the pressure in the boiler is low.
● Check water pressure
● Check water pressure sensor
FAULT CODES 5x
Fault codes 5x appear if a problem with the main board exists.
● Check parameters
● Check gas valve
● Check PCB
FAULT CODES 6x
Fault codes 6x appear if a problem exists with the secondary
(DHW) thermistor.
● Check thermistor
● Check wiring continuity
FAULT CODE 7x
Fault codes 7x appear if a problem exists with the flow temperature
(2nd CH).
● Check thermistor
● Check wiring continuity
FAULT CODE 8x
PCB fault
FAULT CODE 9x
Fault codes 9x appear if the condense trap/pipe has become
blocked.
● Ensure the condense trap is clear
● Ensure the condense pipe is clear
25
PLANT
PARAMETER
1
2
3
Gas type
Boiler output
Building structure
(adjust only if external sensor is fitted)
UNIT
Min.
MIN
MAX
STEP
1 (Natural gas)
2 (LPG)
34 (35 kW)
5 (light type
20 (heavy type
of construction)
of construction)
DEF.
1
34-50
34 (35 kW)
1
5
STEP
DEF.
INSTALLAT.
SETTING
DOMESTIC HOT WATER PARAMETERS
PARAMETER
UNIT
MIN
MAX
10 This parameter is not used on this model. Do not modify
11
12
13
14
0 = OFF
1 = N/A
2 = N/A
3 = N/A
4 = N/A
5 = N/A
40
This parameter is not used on this model. Do not modify °C
This parameter is not used on this model. Do not modify
This parameter is not used on this model. Do not modify
This parameter is not used on this model. Do not modify
1
1
60
INSTALLAT.
SETTING
0
60
60
80
5
CENTRAL HEATING PARAMETERS
PARAMETER
UNIT
MIN
MAX
20 Central heating type
0 = OFF
1 = ON
2 = Unused
3 = 2nd PUMP
4 = Unused
5 = Unused
6 = Unused
21 Max flow temperature 1st CH
22 Min flow temperature 1st CH
23 Max output CH (fan speed)
°C
°C
rpm
24 Min output CH (fan speed)
rpm
25
26
28
29
30
31
32
°C
°C
Min
Min
Differential heating positive
Differential heating negative
CH timer: force burner 75% after CH-start
CH timer: blocking time CH
CH timer on/off selection
Max flow temperature 2nd CH
Min flow temperature 2nd CH
FUNCTIONS
PARAMETER
40
20
37 (3700*)
NG
35 kW 14
2
2
0
0
0 (OFF)
40
20
°C
°C
UNIT
LPG
14
MIN
40 This parameter is not used on this model. Do not modify
41 This parameter is not used on this model. Do not modify
42
43
44
45
46
47
48
50
51
52
S.A.R.A. Function
S.A.R.A. Booster Function
1st CH circuit climatic Thermo-regulation 2
Climatic curve selection on 1st CH circuit 2
2nd CH circuit climatic Thermo-regulation 1 - 2
Climatic curve selection on 2nd CH circuit 1 - 2
Unused
Unused
Unused
Unused
GENERAL
PARAMETER
61
62
63
65
85
86
1
This parameter is not used on this model. Do not modify
CH frost protection temperature
N/A
Unused
Unused
Unused
0 (OFF)
0 (OFF)
0 (OFF)
2,5
0 (OFF)
2,5
0 (OFF)
0 (OFF)
0 (OFF)
0 (OFF)
UNIT
°C
°C
°C
Only with 2nd CH circuit
Working only if an external sensor is fitted
* The value is shown on the display as rpm/100 (i.e. 3700/100 = 37)
2
26
STEP
MIN
80
39
NG
35 kW 60
LPG
60
1
1
1
1
DEF.
1 (ON)
80
39
NG
35 kW 60
LPG
60
NG
35 kW 14
LPG
14
36 (3600*)
1
10
10
20
20
1 (ON)
80
39
1
1
1
1
1
1
1
MAX
STEP
DEF.
1
0 (OFF)
1
1
1
1
2,5
1
2,5
1
1
1
1
0 (OFF)
1 (AUTO)
1 (AUTO)
1 (AUTO)
20
1 (AUTO)
20
0 (OFF)
1 (ON)
0 (OFF)
0 (OFF)
0 (OFF)
1 (AUTO)
2 (ON)
0 (OFF)
1 (AUTO)
2 (ON)
1(AUTO)
1 (AUTO)
1 (AUTO)
40
1 (AUTO)
40
1 (AUTO)
1 (ON)
1 (ON)
1 (ON)
MAX
6
6
15
5
0 (OFF)
80
39
STEP
DEF.
4
6
6
255
0 (OFF)
0.6
0
0
0
10
10
10
1
1
1
0 (OFF)
1 (ON)
1
INSTALLAT.
SETTING
INSTALLAT.
SETTING
INSTALLAT.
SETTING
SECTION 8
8.1
WIRING DIAGRAMS
EXTERNAL WIRING
The appliance comes with a factory fitted link to
allow basic operation of the boiler via the mode
selector switch. If external controls are to be added
to the system, they must be connected to the
appliance as shown in the following diagrams. For
advice on controls that are not featured in this
book, please contact Vokera technical on 0870
333 0520.
Fig. 39
8.2
TYPICAL CONTROL APPLICATIONS
The appliance can be used with the following
controls:
● single-channel, voltage-free time clocks (fig. 39)
● programmable room thermostats (fig. 39)
● twin-channel programmers (figs 40 & 41). The
appliance can be used in conjunction with typical ‘S’-Plan/’Y’-Plan systems (see 8.4.1 & 8.4.2),
please contact Vokera technical should you
require further detailed instruction.
8.3
OTHER DEVICES
P2: external pump, a supplementary pump that
can be managed directly from the boiler in order
to satisfy larger systems with high flow rate or
high pressure drop (i.e. underfloor heating).
Contact the controls manufacturer and/or Vokera
technical department should you require more
specific information on the suitability of a particular control. Further guidance on the recommended
practice for the installation of external controls,
can be found in CHeSS – HC5/HC6
(www.energyefficiency. gov.uk).
27
8.4.1
“Y”-PLAN WITH EXTERNAL TWIN CHANNEL PROGRAMMER (fig. 40)
Fig. 40
8.4.2
“S”-PLAN WITH EXTERNAL TWIN CHANNEL PROGRAMMER (fig. 41)
Fig. 41
28
FUNCTIONAL DIAGRAM
NOTE. L-N-E CONNECTION MUST NOT BE INTERCHANGED
CONTROL SWITCHING OF TIME CLOCK AND ROOM THERMOSTAT RATED IS 230 V.a.c.
Fig. 42
Key
TRX
F
P
P2
F1
F2
OPE
S.S.E
MOD
C.S.
G.V.
TSC1
TR1
O.S
WPS
FS
RS
Fan transformer
Fan
Pump
Supplementary external pump
Fuse 4A F
Fuse 2A F
Gas valve solenoids
Spark/Sense electrode
Modulator
Condensate sensor
Gas valve
Sparking transformer
Main transformer
Outside sensor
Water pressure sensor
Flow termoster
Return termoster
AE01A-P1
AE01A-P2
M0T2B
AC0X
K9
K13
K14
K1
K7
K6
K12
K2
F.O.H.T
H.E.T
M3-M6
M10
M2
Master board
Ausiliary board controll
Motor control board
Display board
Pump relay
3 V1 relay
3 V2 relay
Not used
Not used
Flame sensing relay
Power supply for brushless motor relay
Power supply for discharge TSC1 trasformer
Flow over heat thermostat
Heat exchanger thermostat
Terminal strip for electrical connection hight power
Terminal strip for electrical connection low power
Terminal strip connection secondary pump
29
SECTION 9
EXPLODED DIAGRAMS
1
31
226
25
20
18
300
38
90
301
302
226
26
304
303
305
POS.
1
18
20
25
26
31
38
90
226
300
301
302
303
304
305
30
DESCRIPTION
Frame assembly
Cover assembly
Printed Circuit Board
Front cover assembly
Instrumental panel
Case
Driver PCB
Fuse
Edge clip
Wiring harness
Wiring harness
Wiring harness
Wiring harness
Wiring harness
Wiring harness
35 HE
01005367
10026239
10026240
10025842
10027949
10026241
10027200
3478
5128
10026341
10027953
10027360
10026333
10026337
10026330
63
9
201
13
10
436
22
288
440
441
12
351
432
265
6
442
28
290
7
288
432
105
288
432
432 47
435
444
443
48
288
435
266
432
353
27
50
266
353
109
27
108
600
POS.
6
7
9
10
12
22
27
28
47
48
50
63
105
201
265
266
288
290
351
353
432
435
436
440
441
442
443
444
600
DESCRIPTION
By-pass casing
Heating by-pass valve
Heating manifold and cartridge
3 way valve cartridge
Fixing fork wrench
Safety valve
Heating cock
Connection
By-pass casing cover
Discharge cock
Connections cover
Pipe
Pressure transductor
Washer
Washer
Washer
Washer
Clip
Nut
Nut
Clip
Connection
Clip
Hole cap
Clip
O-ring
O-ring
Washer
Wiring harness
35 HE
10024641
2047
10027768
10025305
10025450
10025055
1789
1790
10024643
10024646
10027685
10026228
10027132
5026
5236
5237
6898
2165
1823
1824
10024958
10025059
10025062
10024645
10025063
10025065
10025064
10025066
10027952
31
478
17
476
287
477
1
9
200
7
476
343
477
48
478
201
10
200
69
2
200
290
290
247
200
2
26
27
6
290
3
25
512
4
372
66
POS.
1
2
3
4
6
7
9
10
17
25
26
27
48
66
69
200
201
247
287
290
343
372
476
477
478
512
32
DESCRIPTION
Expansion vessel
Flexible pipe
Circulation pump
Pump cable
Pipe
Pipe
Pipe
Pipe
Air vent bottle
Siphon
Flexible pipe
Flexible pipe
Pipe
Flexible pipe
Pressure gauge
Washer
Washer
Washer
Limit thermostat
Clip
Nut
Clip
O-ring
Clip
NTC sensor
Washer
35 HE
2573
10025188
10027258
10026338
10026264
10027317
10027318
10027146
10026275
10027190
10027191
10027192
10027321
10026272
10027135
5023
5026
5203
2258
2165
2216
2588
10026324
10026269
10026273
10027193
27
16
2
1
218
27
479
480
1
5
19
35
A
486
6
67
12
23
500
497
2
200
4
69
13
72
3
501
328
200
15
39
600
502
503
POS.
1
2
3
4
5
6
12
13
15
16
19
27
35
39
46
46
67
69
72
200
479
480
486
497
500
501
502
503
504
600
DESCRIPTION
Air box bottom
Ambidx air box side
Fan
Burner assembly
Spark electrode
Detection electrode
Gas pipe
Gas valve
Gas cock
Air box cover
Glass assembly
Hole cap
Air/gas conveyor
Gas pipe
Gas diaphragm
Gas diaphragm
Washer
Tryton
Mixer
Washer
Transformer
Transformer
O-ring
Fan washer
Wiring harness
Wiring harness
Wiring harness
Wiring harness
Wiring harness
LPG conversion kit
504
35 HE
10027175
10026231
10027051
10026548
10027864
10026316
10026318
10027187
10020897
10026230
10026328
10023805
10026309
10027196
10027162
2111
10026322
10027089
10024295
5023
10026237
10026236
10026325
10026796
10026558
10026332
10026336
10026339
10024121
01005390
33
27
487
12
509
487
7
1
475
POS.
1
7
12
27
475
482
487
509
34
DESCRIPTION
Condensing exchanger assembly
Conveyor assembly
Flue drain connection
Fumes testing connection screw
Washer
Washer
Washer
Limit thermostat
35 HE
01005369
10026310
10026311
10020625
10026323
10026366
10026345
10026982
482
SECTION 10
10.1
BS
BS
BS
BS
BS
10.2
L.P.G. INSTRUCTIONS
RELATED DOCUMENTS
6798
5449
5446
5440
5482
PART 1
PART 1
PART 1
INSTALLATION OF BOILERS OF RATED INPUT NOT EXCEEDING 60 kW
FORCED CIRCULATION HOT WATER SYSTEMS
INSTALLATION OF GAS HOT WATER SUPPLIES FOR DOMESTIC PURPOSES
FLUES
DOMESTIC BUTANE & PROPANE GAS BURNERS IN PERMAMENT DWELLINGS
TECHNICAL DATA
Gas Pressures
Mynute 35HE
Inlet pressure
Maximum gas rate
Minimum gas rate
Injector size (quantity)
Flue details (coaxial)
Maximum horizontal flue length (60/100mm)
Maximum vertical flue length (60/100mm)
Flue details (twin pipes)
Maximum horizontal flue length (80mm + 80mm)
Maximum vertical flue length (80mm + 80mm)
Efficiency
SEDBUK (%)
Emissions
NOx (max-min)
CO (max-min)
CO2 (max-min)
CO/CO2 ratio (max)
CO/CO2 ratio (min)
10.3 CONVERTING THE APPLIANCE GAS TYPE
To convert the appliance to another gas type it is
necessary to change the burner injector and adjust
the gas valve. It is also necessary to enter the
appliance engineer mode and change the fan speed
at the maximum output.
● To change the injector see 6.12.1
● To change parameters see 7.3.1
● To adjust CO value see 7.4.1-2
2
10.4 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.
10.5 GAS SUPPLY INSTALLATION
The entire installation including the meter must be
purged and checked for gas soundness.
10.6 ADJUSTING THE GAS VALVE
THE GAS VALVE MUST BE SET-UP OR ADJUSTED WITH THE AID OF A PROPERLY CALIBRATED FLUE GAS ANALYSER.
Isolate the appliance from the electrical supply and
remove the appliance casing as described in 4.7.1.
Set the flue gas analyser to read CO2 and insert the
probe into the flue analysis test point (seee fig. 1).
Restore the electrical supply to the boiler and switch
off the boiler. Push INFO and MODE buttons at the
same time for 10 seconds to enter the adjusting
menu. The display shows “CodE” (see fig. 43).
Select the adjusting password by turning the RH
(right-hand) encoder and confirm it by pushing
MODE button.
37.0 mbar
2.69 kg/h
0.54 kg/h
1 x Ø 5.0 mm
Mynute 35HE
7.80
8.80
Mynute 35HE
50 + 50
50 + 50
Mynute 35HE
90.55 (A)
Mynute 35HE
123.2 - 105.6 mg/kWh
280.8 - 43.20 mg/kWh
10.0 - 10.0 %
0.002 to 1
0.0004 to 1
Fig. 43
MODE
INFO
10.6.1 MAXIMUM SETTING
Select the HH parameter by turning the RH (righthand) encoder and confirm it by pushing MODE
button.The boiler starts at the maximum power, the
CO2 reading should be as shown in the table above.
If the CO2 reading is correct, press the MODE
button to exit the maximum setting. 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 (see fig. 38) - clockwise to decrease, counter clockwise to increase until the correct value is displayed on the CO2
analyser (allow time for the analyser to stabilise).
IMPORTANT
A GAS SOUNDNESS CHECK MUST BE CARRIED OUT.
10.6.2 MINIMUM SETTING
Select the LL parameter by turning the RH (righthand) encoder and confirm it by pushing MODE
button. The boiler starts at the minimum power, the
CO2 reading should be as shown in the table above.
If the CO2 reading is correct, press the MODE
button to exit the minimum setting. If the CO2
35
reading is incorrect, the minimum gas pressure
must be adjusted as follows:
● using a suitable screwdriver, very slowly turn the
minimum adjustment screw (see fig. 38) - 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 9.6.1, check that
the maximum setting correct value is still being
obtained. If not, repeat the above procedure.
BENCHMARK No.
GAS BOILER COMMISSIONING CHECKLIST
COLLECTIVE MARK
BOILER SERIAL No.
NOTIFICATION No.
CONTROLS To comply with the Building Regulations, each section must have a tick in one or other of the boxes
TIME & TEMPERATURE CONTROL TO HEATING
ROOM T/STAT & PROGRAMMER/TIMER
PROGRAMMABLE ROOMSTAT
CYLINDER T/STAT & PROGRAMMER/TIMER
COMBI BOILER
HEATING ZONE VALVES
FITTED
NOT REQUIRED
HOT WATER ZONE VALVES
FITTED
NOT REQUIRED
THERMOSTATIC RADIATOR VALVES
FITTED
AUTOMATIC BYPASS TO SYSTEM
FITTED
TIME & TEMPERATURE CONTROL TO HOT WATER
NOT REQUIRED
FOR ALL BOILERS CONFIRM THE FOLLOWING
THE SYSTEM HAS BEEN FLUSHED IN ACCORDANCE WITH THE BOILER MANUFACTURER’S INSTRUCTIONS?
THE SYSTEM CLEANER USED
THE INHIBITOR USED
FOR THE CENTRAL HEATING MODE, MEASURE & RECORD
GAS RATE
3/hr
3/hr
BURNER OPERATING PRESSURE (IF APPLICABLE)
N/A
CENTRAL HEATING FLOW TEMPERATURE
°C
CENTRAL HEATING RETURN TEMPERATURE
°C
FOR COMBINATION BOILERS ONLY
HAS A WATER SCALE REDUCER BEEN FITTED?
YES
NO
WHAT TYPE OF SCALE REDUCER HAS BEEN FITTED?
FOR THE DOMESTIC HOT WATER MODE, MEASURE & RECORD
GAS RATE
3/hr
MAXIMUM BURNER OPERATING PRESSURE (IF APPLICABLE)
N/A
COLD WATER INLET TEMPERATURE
3/hr
mbar
°C
HOT WATER OUTLET TEMPERATURE
°C
WATER FLOW RATE
lts/min
FOR CONDENSING BOILERS ONLY CONFIRM THE FOLLOWING
THE CONDENSATE DRAIN HAS BEEN INSTALLED IN ACCORDANCE WITH
THE MANUFACTURER’S INSTRUCTIONS?
YES
FOR ALL INSTALLATIONS CONFIRM THE FOLLOWING
THE HEATING AND HOT WATER SYSTEM COMPLIES
WITH CURRENT BUILDING REGULATIONS
THE APPLIANCE AND ASSOCIATED EQUIPMENT HAS BEEN INSTALLED AND COMMISSIONED
IN ACCORDANCE WITH THE MANUFACTURER’S INSTRUCTIONS
IF REQUIRED BY THE MANUFACTURER, HAVE YOU RECORDED A CO/CO2 RATIO READING?
N/A
THE OPERATION OF THE APPLIANCE AND SYSTEM
CONTROLS HAVE BEEN DEMONSTRATED TO THE CUSTOMER
THE MANUFACTURER’S LITERATURE HAS BEEN LEFT WITH THE CUSTOMER
COMMISSIONING ENG’S NAME PRINT
SIGN
36
CORGI ID No.
DATE
YES
CO/CO2 RATIO
SERVICE INTERVAL RECORD
It is recommended that your heating system is serviced regularly
and that you complete the appropriate Service Interval Record Below.
Service Provider. Before completing the appropriate Service Interval Record below, please ensure you have carried out the service
as described in the boiler manufacturer’s instructions. Always use the manufacturer’s specified spare part when replacing all controls
SERVICE 1 DATE
SERVICE 2 DATE
ENGINEER NAME
COMPANY NAME
TEL No.
ENGINEER NAME
COMPANY NAME
CORGI ID CARD SERIAL No.
TEL No.
CORGI ID CARD SERIAL No.
COMMENTS
COMMENTS
SIGNATURE
SIGNATURE
SERVICE 3 DATE
SERVICE 4 DATE
ENGINEER NAME
COMPANY NAME
ENGINEER NAME
TEL No.
CORGI ID CARD SERIAL No.
TEL No.
CORGI ID CARD SERIAL No.
COMMENTS
COMMENTS
SIGNATURE
SIGNATURE
SERVICE 5 DATE
SERVICE 6 DATE
ENGINEER NAME
ENGINEER NAME
COMPANY NAME
TEL No.
COMPANY NAME
CORGI ID CARD SERIAL No.
COMMENTS
CORGI ID CARD SERIAL No.
COMMENTS
SIGNATURE
SIGNATURE
SERVICE 7 DATE
SERVICE 8 DATE
ENGINEER NAME
COMPANY NAME
ENGINEER NAME
TEL No.
COMMENTS
TEL No.
CORGI ID CARD SERIAL No.
COMMENTS
SIGNATURE
SIGNATURE
SERVICE 9 DATE
SERVICE 10 DATE
ENGINEER NAME
ENGINEER NAME
COMPANY NAME
COMPANY NAME
TEL No.
CORGI ID CARD SERIAL No.
TEL No.
CORGI ID CARD SERIAL No.
COMPANY NAME
TEL No.
COMPANY NAME
COMMENTS
CORGI ID CARD SERIAL No.
COMMENTS
SIGNATURE
SIGNATURE
37
Cod. 10027954 - 09/06 - Ed. 2
energizing home heating
Vokèra Ltd.
4th Floor, Catherine House, Boundary Way, Hemel Hempstead, Herts, HP2 7RP
Email: [email protected] 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”
supports Benchmark
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