Vokera Vision Plus 20S/25S/30S INSTALLATION AND SERVICING INSTRUCTIONS (Cod. 20174791 - 07/20 - Ed. 2)

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Page 1

VISION PLUS

High efciency system boiler

Users Instructions

Installation & Servicing Instructions

VISION PLUS 20 S G.C. N° 41-364-06 VISION PLUS 25 S G.C. N° 41-364-07

VISION PLUS 30 S G.C. N° 41-364-08

THESE INSTRUCTIONS TO BE RETAINED BY USER

Vokèra is a licensed member of the Benchmark scheme which aims to improve the standards of installation and commissioning of domestic hot water systems in the UK.

Page 2

1.1A

GAS APPLIANCES 3

1.2A ELECTRICAL SUPPLY 3

1.3A WARRANTY REGISTRATION 3

1.4A APPLIANCE COMMISSIONING CHECKLIST (UK ONLY) 3

1.5A HOW DOES IT WORK? 3

1.6A DIMENSION 3

1.7A CLEARANCES REQUIRED 3

1.8A FROST PROTECTION SYSTEM 3

1.9A CONTROL PANEL 4

2a GETTING STARTED 5

2.1A PARAMETERS ACCESS 5

2.2A PROGRAMMING THE BOILER 5

2.3A OPERATING MODE 6

2.4A BOILER FAULT CODES 8

2.5A INFO MENU 8

3a HOW TO... 9

3.1A HOW TO TOP-UP THE SYSTEM PRESSURE 9

3.2A HOW TO

3.3A HOW TO SHUT DOWN THE SYSTEM FOR SHORT PERIODS 9

3.4A HOW TO SHUT DOWN THE SYSTEM FOR LONG PERIODS

3.5A HOW TO CARE FOR THE APPLIANCE 9

3.6A KEYBOARD LOCKOUT FUNCTION 9

3.7A INTERFACE STAND BY 9

4a WHAT IF... 10

4.1A WHAT IF I SUSPECT A GAS LEAK 10

4.2A WHAT IF I HAVE FREQUENTLY TO TOP-UP THE SYSTEM 10

4.3A WHAT IF THE APPLIANCE IS DUE ITS ANNUAL SERVICE 10

4.4A WHAT IF I NEED TO CALL AN ENGINEER 10

1 INTRODUCTION 11 2 DESIGN PRINCIPLES AND OPERATING SEQUENCE 12

2.1 PRINCIPLE COMPONENTS 12

2.2 MODE OF OPERATION (AT REST) 12

2.3 MODE OF OPERATION (HEATING) 12

2.4 MODE OF OPERATION (HOT WATER) 12

2.5 SAFETY DEVICES 12

2.6 TECHNICAL DATA 13

2.7 PUMP DUTY 15

2.8 HOW TO FREE THE PUMP 15

3 GENERAL REQUIREMENTS (UK) 16

3.1 RELATED DOCUMENTS 16

3.2 LOCATION OF APPLIANCE 16

3.3 GAS SUPPLY 16

3.4 FLUE SYSTEM 16

3.5 AIR SUPPLY 16

3.6 WATER CIRCULATION 16

3.7 ELECTRICAL SUPPLY 17

3.8 MOUNTING ON A COMBUSTIBLE SURFA

3.9 TIMBER FRAMED BUILDINGS 17

3.10 WATER TREATMENT 17

3.11 SHOWERS 17

3E GENERAL REQUIREMENTS (EIRE) 17

3.1E RELATED DOCUMENTS 17

3.2E LOCATION OF APPLIANCE 17

3.3E GAS SUPPLY 18

3.4E FLUE SYSTEM 18

3.5E AIR SUPPLY 18

3.6E WATER CIRCULATION 18

3.7E ELECTRICAL SUPPLY 18

3.8E MOUNTING ON A COMBUSTIBLE SURFACE 18

3.9E TIMBER FRAMED BUILDINGS 18

3.10E WATER TREATMENT 18

3.11E SHOWERS 18

3.12E DECLARATION OF CONFORMITY 18

4 INSTALLATION 19

4.1 PREPARATION FOR MOUNTING THE APPLIANCE 19

4.2 FITTING THE FLUE 19

4.3 CONNEC

4.4 INSTALLATION OF CONDENSATE DRAIN PIPE 21

4.5

INSTRUCTION FOR CONDENSATION EXHAUST CONNECTION

4.6 ELECTRICAL CONNECTIONS 22

4.7 CASING REMOVAL 22

4.8 CONNECTING THE MAINS (230V) INPUT 22

5 OPERATION 23

5.1 ACCESS TO THE PARAMETERS 23

5.2 CONTROL PANEL 23

5.3 SETTINGS MENU TREE STRUCTURE 24

5.4 STARTING THE BOILER 25 2

RESET THE APPLIANCE 9

CE 17

TING THE GAS AND

TER (“FIG. 17”) 21

5.5 BOILER CONFIGURATION 26

5.6 FIRST COMMISSIONING 28

5.7 VENT CYCLE 28

5.8 OPERATING STATUS 28

6 COMMISSIONING 30

6.1 GAS SUPPLY INSTALLATION 30

6.2 THE HEATING SYSTEM 30

6.3 INITIAL FILLING OF THE SYSTEM 30

6.4 PRE-OPERATION CHECKS 30

6.5 INITIAL LIGHTING 30

6.6

CHECKING GAS PRESSURE AND COMBUSTION ANALYSIS

6.7 FINAL FLUSHING OF THE HEATING SYSTEM 30

6.8 SETTING THE FLOW OUTLET TEMPERATURE 30

6.9 SETTING THE SYSTEM DESIGN PRESSURE 30

6.10 REGULATING THE CENTRAL HEATING SYSTEM 31

6.11 FINAL CHECKS 31

6.12 INSTRUCTING THE USER 31

7 SERVICING INSTRUCTIONS 31

7.1 GENERAL 31

7.2 ROUTINE ANNUAL SERVICING 31

7.3 CLEANING THE PRIMARY HEAT EXCHANGER 32

7.4 CLEANING THE BURNER 32

7.5 CLEANING THE SIPHON 32

7.6 MAINTENANCE OF THE IONISATION ELECTRODE 32

7.7 CLAPET 32

7.8 REPLACEMENT OF COMPONENTS 33

7.9 COMPONENT REMOVAL PROCEDURE 33

7.10 CASING REMOVAL (“FIG. 25”) 33

7.11 PUMP ASSEMBLY (“FIG. 26”) 33

7.12 SAFETY VALVE (“FIG. 27”) 33

7.13 LOWER ATOMATIC AIR RELEASE VALVE (“FIG. 26”) 33

7.14 WATER PRESSURE TRANSDUCER

7.15 FLOW THERMISTOR

7.16 RETURN THERMISTOR

7.17 PRINTED CIRCUIT BOARD

7.18 GAS VALVE

7.19 ELECTRODES

7.20 EXPANSION VESSEL (FIG. 32) 34

7.21 HEAT EXCHANGER (FIG. 33) 34

7.22 COMBUSTION UNIT 35

7.23 FAN AND MIXER 35

7.24 REMOVING THE SIPHON FIG. 37) 35

7.25 REPLACING INTERFACE 35

7.26 REPLACING PCB OR INTERFACE 35

8 CHECKS, ADJUSTMENTS AND FAULT FINDING 36

8.1 CHECKING APPLIANCE OPERATION 36

8.2 APPLIANCE MODES OF OPERATION 36

8.3 HEATING MODE 36

8.4 CHECKING THE CO2 AND ADJUSTING THE GAS VALVE 36

8.5 CHECKING THE EXPANSION VESSEL 37

8.6 EXTERNAL FAULTS 37

8.7 ELECTRICAL CHECKS 38

8.8 FAULT FINDING 38

8.9 COMPONENT VALUES & CHARACTERISTICS 38

8.10 ADJUSTMENTS 38

8.11 GAS VALVE CALIBRATION 39

8.12 RANGE RATED 39

8.13 SETTING THE THERMOREGULATION 39

8.14 LIGHTS AND FAULTS 40

8.15 BOILER FAULT CODES 42

8.16 INFO MENU 42

8.17 EMBEDDED CLOCK 43

8.18 CLOCK FUNCTIONALITY 43

8.19 PROGRAMMING THE EMBEDDED CLOCK 43

9 WIRING DIAGRAMS 44

9.1 EXTERNAL WIRING 44

9.2 OTHER DEVICES 44

9.3 OTBUS CONNECTION 44

9.4 RELATED DOCUMENTS 46

10 LPG INSTRUCTIONS 46

10.1 TECHNICAL DATA 46

10.2 GAS CONVERSION 46

10.3 COMPLETION 46

(FIG. 30) 34

(FIG. 3 - POS. 7) 33

(FIG. 3 - POS. 21) 33

(FIG. 31) 34

(FIG. 28) 33

(FIG. 29) 33

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USERS INSTRUCTIONS

INTRODUCTION

Dear Customer Your Vokèra VISION PLUS boiler has been designed to meet and exceed the very latest standards in gas central heating tech-

nology, and if cared for, will give years of reliable use and efciency.

Please therefore take some time to read these instructions carefully.

Do’s and Don’t’s

- Do ensure that the system pressure is periodically checked

- Do ensure that the boiler should not be used by children or unassisted disabled people

- Do ensure that you know how to isolate the appliance in an emergency

- Do ensure that you are familiar with the appliance controls

- Do ensure that your installer has completed the appliance log book section

- Do not attempt to remove the appliance casing or gain internal access

- Do not hang clothes etc. over the appliance

- Do not forget to have the appliance serviced annually.

This booklet is an integral part of the appliance. It is therefore necessary to ensure that the booklet is handed to the person responsible for the property in which the appliance is located/installed. A replacement copy can be obtained from the Vokera website.

At the end of its life, the product should be not be disposed of as solid urban waste, but rather it should be handed over to a differentiated waste collection centre

1A THINGS YOU SHOULD KNOW

1.1A GAS APPLIANCES

Gas Safety (Installation and Use) Regulation (UK).

In the interests of your safety and that of others it is a legal requirement that all gas appliances are installed and correctly maintained by a competent person and in accordance with the latest regulations.

1.2A ELECTRICAL SUPPLY

Please ensure that this appliance has been properly connected to the electrical supply by means of a double pole isolator or un-switched socket, and that the correct size of fuse (3 AMP)

has been tted.

Warning: this appliance must be earthed!

1.3A WARRANTY REGISTRATION

The appliance warranty can be registered online or by contacting our warranty registration helpline using the contact number displayed

on the registration label on the front of your appliance.

1.4A APPLIANCE COMMISSIONING CHECKLIST (UK ONLY)

A checklist section can be found at the rear of the appliance installation booklet. This important document must be completed during the installation/commissioning of your boiler. All GAS SAFE registered installers carry a GAS SAFE ID card, and have a registration number. These details should be recorded in the Benchmark commissioning checklist section within the installation booklet. You can check your installers details by calling GAS SAFE direct on 08004085500. Failure to install and commission the appliance in accordance with the manufacturers instructions will invalidate the warranty. This does not affect your statutory rights.

1.5A HOW DOES IT WORK?

Your VISION PLUS boiler supplies heated water to your radiators and hot water to your hot water taps. The central heating and hot water are controlled via a time clock and any thermostats

that your installer may have tted. The boiler will light when it

receives a request from the time clock via any thermostat that may be installed. Your VISION PLUS boiler lights electronically and does not have a pilot light. In the unlikely event of a fault developing with your boiler, the supply of gas to the burner will be terminated automatically.

1.6A DIMENSION

VISION PLUS (dimesions mm) 20S 25S 30S

HEIGHT 740 740 740

WIDTH 420 420 420

DEPTH 275 350 350

1.7A CLEARANCES REQUIRED

ABOVE 100mm*

BELOW 200mm^

LEFT SIDE 2mm

RIGHT SIDE 2mm**

FRONT 4mm***

* 100mm if rear-ue outlet is used or 25mm above ue bend if top

ue outlet is used. Consideration should be given to providing reasonable clearance for the insertion of a FGA probe.

** Disconnection of adjacent components may be required in order to

facilitate syphon removal.

*** Provided that a door or removal panel enables 450mm access for

maintenance.

^ Can be reduced to 5mm if a removal panel enables 200mm for

maintenance.

100

1.8A

FROST PROTECTION SYSTEM

The VISION PLUS is equipped with a built-in frost protection system, this enables the boiler to over-ride the time controls

– even if switched off – and operate the burner and/or pump, should the temperature drop below 50C. In particular the burner will be in ON status until the main temperature reaches 35°C for CH appliance. Please note that the frost protection system is designed to protect the appliance only, should frost protection be required for the heating system, additional controls may be required.

NOTE

The frost protection system is reliant on the appliance having a permanent electrical supply, and being in a non-fault condition.

200

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Reset

1.9A CONTROL PANEL

Your boiler is equipped with a large LCD display that indicates the appliance operating status.

Indicates the connection to a remote device (OT or RS485)

Indicates the connection to a WIFI device

Indicates the presence of an outdoor temperature sensor

Indicates the connection to a heat pump (not used on this model)

Displayed when a fault occurs and/or when there is an alarm

Fig. 1

A+C

1+3

2+3

RESET

1 2 31 2 3

When the arrow is highlighted it has the conrm function

CONFIGURATION/STEP-BACK/RETURN

It is normally used to raise the heating water temperature, when the arrow is highlighted you can move inside the P1 menu

It is normally used to lower the heating water temperature, when the arrow is highlighted you can move inside the P1 menu

Access to the menu for setting the clock (see paragraph ““2.2a PROGRAMMING THE BOILER””)

Used to change the operating status of the boiler (OFF, and WINTER)

Used to reset the alarm status or to interrupt the vent cycle

Used to access the INFO and P1 menus. When the icon

ENTER function and is used to conrm the value set

during the programming of a technical parameter

Lock and unlock keys

When the boiler is set to OFF it is used to start the combustion analysis function (CO)

is shown on the display, the key has the

Fault and/or service indicator

Indicates the presence of a ame, in the event of a ame lockout the icon looks like

It comes on when there are alarms that require a manual reset by the user

It comes on when there is an operation conrmation

request

When the icon is active, it indicates that the "conrm”

function of button A is active

When the icon is active, it indicates that the "back/ cancel” function of button B is active

When the icon is active, it is possible to navigate the menu or raise the value of the selected parameter

When the icon is active, it is possible to navigate the menu or lower the value of the selected parameter

The icon comes on if central heating is active, it blinks if a heating request is in progress

They indicate the set point level set (1 bar minimum value, 4 bars maximum value)

1 2 3 4 5 6 7

AUTO

MAN ON Only if clock is enabled

MAN OFF Only if clock is enabled

Indicates the days of the week

Only if clock is enabled

The user interface has the function of a machine interface, displaying the system settings and providing access to the parameters. The display normally shows the temperature of the ow sensor; if no key is touched within 10 sec the current time is displayed (backlight unlit).

The conguration MENU is organised with a multi-level tree structure. An access level has been xed for each sub-menu: USER level

always available; TECHNICAL level password protected.

Some of the information might not be available depending on the access level, the status of the machine or the system conguration.

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2A GETTING STARTED

2.1A PARAMETERS ACCESS

Pressing the MENU key for at least 2 sec provides access to the P1 menu, allowing the parameters to be programmed. If the case the menu is empty, P8.04 is displayed, otherwise the

rst item in the menu appears.

 With power on the backlight comes on, then all the icons and

the segments come on for 1sec and in sequence the rmware revision is displayed for 3sec:

 Then the interface displays the status active at that moment.

IMPORTANT

The parameters dedicated to the user are the following:

Scrolling message

Menu Parameters

only if parameter

Value

P1.05 = 1

P1.01 LANGUAGES

P1.02 TIME USER

P1.03 TIME PROGRAM

P1.05 SCROLLING 0 / 1 USER

SETTINGS

0 IT 1 RO 2 FR 3 EN 4 SR 5 HR 6 ES 7 EL 8 BG 9 PL 10 SL

Only if clock is

enabled - see 8.16

Password

level

USER

If necessary, the interface automatically goes to the clock menu. On the main screen the icons , , and and ENTER

come on while 00:00 is displayed with the rst two digits blinking

with a frequency of 0.5 sec ON, 0.5 sec OFF.

To set the time and day proceed as follows:

 set the hour with the and arrows, then conrm with A  set the minutes with the and arrows, then conrm with A  set the day of the week with the and arrows. The

segment of the day selected blinks, press MENU at the icon

per to conrm the time and day setting. The clock blinks

for 4sec and then returns to the main screen

 to exit the time programming without saving the modied values,

just press .

NOTE: It is possible to change the TIME and DAY settings also

later by accessing the P1.02 parameter in the P1 menu, or by pressing the A+C keys for at least 2sec.

P1 (SETTINGS menu)

P1.01

Select the parameter to set the desired language (see above table).

P1.02

From this menu the time and the number of the day of the week can be adjusted.

P1.03

Available only if embedded clock has been enabled.

P1.05

This parameter allows you to enable scrolling text after the parameter

code itself:

0= OFF 1= ON

2.2A PROGRAMMING THE BOILER

Ensure the gas and electrical supplies to the appliance are switched on.

RESET

 If you need to set the language, select the menu P1 and conrm

your choice using .

 Use the arrows to display parameter P1.01, then enter the submenu

by pressing .

 Use the and buttons to set the desired language – see

“

“2.1a PARAMETERS ACCESS””

. To conrm your choice, press

Page 6

Vent cycle

Whenever the electrical supply to the appliance has been disrupted (OFF) and then restored (ON), it will enter a 4-min vent cycle.

When the air purging cycle is in progress, all heat requests are inhibited when the boiler is not set to OFF and -AIR is displayed on the interface screen.

The display shows the message -AIR lighting up the icon RESET.

2.3.3A ADJUSTING THE HEATING WATER TEMPERATURE WITHOUT AN OUTDOOR TEMPERATURE SENSOR CONNECTED

If there is no outdoor temperature sensor the boiler operates

at a xed point, the HEATING setpoint in this case can be set

on the main page of the screen. The successive pressing of the key C or D on the main screen displays the current value of the heating setpoint; the value blinks with a frequency of 0.5 sec ON, 0.5 sec OFF and the icons and come on.

The purge cycle can be interrupted early by keeping key 2 (the icon RESET comes on).

 Adjust the ambient temperature thermostat to the desired

temperature (~20°C) or, if the system is equipped with a programmable thermostat or timer, ensure that the thermo-

stat or timer is “active” and set correctly (~20°C).  Then set the boiler on WINTER.  The boiler will start up and continue working until the set

temperatures are reached, after which it will then go back

to standby.

2.3A OPERATING MODE

For changing the operating status from WINTER to OFF press key 1 until the icon for the desired function is displayed.

2.3.1A WINTER MODE

 Set the boiler to the WINTER status by pressing key 1 until

the heating icon is displayed.

The interface normally displays the delivery temperature.

 When there is a heat request and the burner is lit, the icon

appears on the display.

Heating REQUEST, the radiator icon blinks:

Bar

RESET

The succes

value of the heating setpoint within the preset range:

[40°C - 80.5°C] for high temperature systems [20°C - 45 °C] for low temperature systems with steps of 0.5°C. The level bars beside the heating icon

show the setpoint value set with respect to the operating range:

- four bars on = m

- one bar on = min setpoint

Keeping one of the two keys C or D pressed for longer, the meter increases the speed of advancement modifying the set value. If no key is pressed for 5sec, the value set is taken as the new heating setpoint and the display returns to the main page.

2.3.4A ADJUSTING THE HEATING WATER

If an outdoor temperature sensor is installed and thermoregulation is enabled (parameter P4.18=1), the delivery temperature is automatically selected by the system, which quickly adjusts the ambient temperature according to the variations in the outdoor temperature. If you want to change the temperature, raising it or lowering it with respect to that automatically calculated by the electronic board, it is possible to change the HEATING setpoint selecting the desired comfort level within the range (-5 - +5).

sive pressing of the key C or D allows you to set the

ax setpoint

TEMPERATURE WITH AN OUTDOOR TEMPERATURE SENSOR CONNECTED

2.3.2A OFF

 Set the boiler to the OFF status by pressing key 1 until the

central segments are displayed.

Note: if an outdoor temperature sensor is connected it is in any event possible to have the boiler operate at a xed point

by setting the parameter P4.18 = 0 (menu P4).

2.3.5A SAFETY STOP

If there are ignition faults or boiler operation malfunctions, carry out a “SAFETY STOP”. On the display, in addition to the fault code, the icon is also displayed, which blinks with a frequency of 0.5sec ON and 0.5sec OFF. The backlight blinks for 1min after which it switches off, while the icon continues blinking. On the 4 digits a message scrolls containing the error code and its description.

Page 7

DAY

2.3.6A RESET FUNCTION

The “RESET” icon comes on when there is an alarm that

requires a manual reset by the user (for example ame

lockout). To reset the lockout press key 2 RESET.

DAY

RESET

If the reset attempts do not restart the boiler, contact you engineer or Vokera Ltd. for help or advice.

2.3.7A OTBus REMOTE CONTROL

CONNECTION

When an OTBus remote control is connected to the system,

the boiler display shows the following screen:

In particular on the boiler display:

 it is no longer possible to set the boiler OFF/WINTER sta-

tus (it is set by the OTBus remote control)

 it is no longer possible to set the heating setpoint unless

there is a request from TA and zone valve management is enabled (as in par. 9.3).

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2.4A BOILER FAULT CODES

Parameter

Scrolling message

ERROR

CODE

E010

E011 extraneous ame transitional E020 limit thermostat denitive E030 fan fault denitive E040 pressure transducer – load system denitive E041 water transducer – load system transitional E042 water transducer fault denitive E060 conguration fault (see parameter P3.01) transitional

E070

E077 water thermostat main zone or zone 1 (when enabled) transitional

E080

E084 delivery line probe fault - zone 1 transitional E086 delivery line probe fault - main zone transitional

E090

E091 clean primary heat exchanger transitional E099 reset attempts exhausted, boiler blocked denitive, not resettable

<0,6 bar >3,0 bar

COM Lost comunication between user interface and boiler board transitional COMP lost communication with main zone transitional COM1 lost communication with zone 1 transitional FWER FW version not compatible denitive OBCD damaged clock signalisation OTER OTBus conguration fault

For reset faults, except for E40-E041, call engineer

condensate discharge blockage

fumes discharge alarm/air intake obstructed

ow sensor overtemperature

ow/return sensor differential alarm

return line probe overtemperature

outlet/return line probe differential alarm

ue gas probe overtemperature

Low water pressure check the HTG system

High water pressure check the HTG system

FAULT

ame lockout/

ow sensor fault

return line probe fault

ue gas probe fault

DESCRIPTION OF ALARM

TYPE

denitive

transitional

denitive denitive

transitional

denitive denitive

transitional

denitive

2.5A INFO MENU

Pressing key 3 on the display screen displays a list of information regarding the operation of the boiler listed by parameter name and value. Passing from the display of one parameter to the next takes place by pressing respectively the keys and

displayed; pressing the key returns you to the main screen:

name

I0.01 SCREED HEATING HOURS Number of hours passed with screed heater function I0.02 CH PROBE Boiler delivery sensor value I0.03 RETURN PROBE Boiler return sensor value I0.04 DHW PROBE not available I0.08 EXHAUST PROBE Flue gas probe value I0.09 OUTDOOR TEMP PROBE Outdoor temperature sensor instantaneous value I0.10 FILTERED OUTDOOR TEMP Outdoor temperature ﬁ ltered value

I0.11

I0.12 FAN SPEED Number of turns of the fan (rpm) I0.13 MAIN ZONE OUTLET Main zone ﬂ ow sensor value (when P4.12 = 1) I0.14 ZONE 1 OUTLET Zone 1 ﬂ ow sensor value (when P4.13 = 1) I0.15 EXHAUST PROBE HOURS Number of hours the heat exchanger has been operating in “condensing mode” I0.16 MAIN ZONE SET Main zone delivery setpoint I0.17 ZONE 1 SET Zone 1 delivery setpoint (when P4.23 = 1) I0.18 WATER PRESSURE System pressure I0.30 COMFORT not available I0.31 SUN ON not available I0.33 PCB ID Electronic board card identiﬁ cation I0.34 PCB FW Electronic board card fmw revision I0.35 INTERFACE FW Interface fmw

. Pressing the key allows the selected parameter to be

only if parameter P1.05 = 1

Description

DHW FLOW RATE not available DHW SETPOINT not available

Page 9

3A HOW TO...

3.1A HOW TO TOP-UP THE SYSTEM PRESSURE

The system pressure must be checked periodically to ensure the correct operation of the boiler. Scroll the INFO menu to

10.18, the displayed pressure should be reading between 1 and

1.5 BAR when the boiler is in an off position and has cooled

to room temperature. If the pressure requires ‘topping-up’ use the following instructions as a guide.

- Locate the lling valve connections (usually beneath the

boiler, see “Fig. 2”).

- Attach the lling loop to both connections.

- Open the lling valve slowly until you hear water entering the

system.

- Close the lling valve when the pressure (on the boiler) reads

between 1 and 1.5 bar.

- Remove the lling loop from the connections.

Fig. 2

control

valve

control valve

temporary connection

ow pipe

double

check- valve

supply

pipe

3.2A HOW TO RESET THE APPLIANCE

When the fault code is displayed, the appliance will require to be reset manually. Before resetting the boiler, check what action is required to be taken, using the information on the fault code table.

RESET FUNCTION

Press the RESET button. At this point, if the correct operating conditions have been restored, the boiler will restart automatically. There are a maximum of 3 consecutive attempts.

In case of all the attempts are exhausted the denitive fault

E099 occurs on the display. To restore from an ‘E099’ fault code, it is necessary to momentarily switch off the electrical supply to the appliance and then restore the electrical supply to the appliance.

While the electrical supply and the fuel supply remain active,

the boiler is protected by the systems:

- heating anti-freeze: this function is activated if the temperature

measured by the flow sensor drops below 5°C. A heat request is generated in this phase with the ignition of the burner at minimum output, which is maintained until the outlet water temperature reaches 35° C.

The operation of the ANTI-FREEZE function is indicated by a scrolling message on the interface display: AF2 (CH antifreeze in progress).

- circulator anti-locking: the circulator activates every 24

hours of stoppage for 30 seconds.

3.4A HOW TO SHUT DOWN THE SYSTEM FOR LONG PERIODS

If the house is to be left unoccupied for any length of time – especially during the winter – the system should be thoroughly

drained of all water. The gas, water, and electricity supply to the house should also be turned off. For more detailed advice contact your installer.

3.5A HOW TO CARE FOR THE APPLIANCE

To clean the outer casing use only a clean damp cloth. Do not use any scourers or abrasive cleaners.

3.6A KEYBOARD LOCKOUT FUNCTION

Pressing buttons 1+3 for at least 2sec activates the key lockout; pressing buttons 1+3 again for at least 2sec reactivates the key. The display will show LOCK.

RESET

DAY

IMPORTANT

If the appliance requires to be reset frequently, it may be indicative of a fault, please contact your installer or Vokèra Customer Services for further advice.

3.3A HOW TO SHUT DOWN THE SYSTEM FOR SHORT PERIODS

The system and boiler can be shut down,in the event of temporary absences (weekends, short breaks, etc.) setting the boiler status to OFF .

Button ‘2’ (reset) remains active if there is a fault to allow the alarm to be reset.

3.7A INTERFACE STAND BY

Usually, when there are no faults or heat requests, the display always shows the temperature measured by the ow sensor. If within 10 seconds there is no heat request without any key being pressed the interface goes into stand by. The display shows the current time, the two points separating the time from the minutes blink with a frequency of 0.5sec ON and

0.5sec OFF, while the status icons will be active if necessary:

Page 10

In the case of stand by press any button to return to normal operating conditions.

4A WHAT IF...

4.1A WHAT IF I SUSPECT A GAS LEAK

If you suspect a gas leak, turn off the gas supply at the gas meter and contact your installer or local gas supplier. If you

require further advice please contact your nearest Vokèra ofce.

4.2A WHAT IF I HAVE FREQUENTLY TO TOPUP THE SYSTEM

If the system regularly requires topping-up, it may be indicative of a leak. Please contact your installer and ask him to inspect the system.

4.3A WHAT IF THE APPLIANCE IS DUE ITS ANNUAL SERVICE

Advice for tenants only

Your landlord should arrange for servicing.

Advice for homeowners Please contact Vokèra Customer Service (0844 3910999 (UK) or 056 7755057 (ROI) if you would prefer a Vokèra service

engineer or agent to service your appliance. Alternatively your local GAS SAFE registered engineer may be able to service the appliance for you.

4.4A WHAT IF I NEED TO CALL AN ENGINEER

If you think your boiler may have developed a fault, please contact your installer or Vokèra Customer Services (0844 3910999 (UK) or 056 7755057 (ROI) have all your details to hand including full address and postcode, relevant contact numbers, and your completed appliance log book

Page 11

INSTALLATION AND SERVICING INSTRUCTIONS

1 INTRODUCTION

All installers are asked to follow the Benchmark Scheme by adhering to the Code of Practise, which can be obtained from www.centralheating.co.uk. The VISION PLUS is comprised of a 7-model range of high

efciency appliances, with outputs ranging from 20kW to 40kW.

These appliances – by design – incorporate electronic ignition, circulating pump, expansion vessel, safety valve, pressure transducer and automatic by-pass. The VISION PLUS S is a range of system boilers. The VISION PLUS range is produced as room sealed, category II2H3P appliances, suitable for internal wall mounting applica-

tions only. Each appliance is provided with a fan powered ue

outlet with an annular co-axial combustion air intake that can be rotated – ho rizontally – through 360 degrees for various horizontal or vertical applications. The VISION PLUS is approved for use with C13 & C33 type

ue applications.

These appliances are designed for use with a sealed system only; consequently they are not intended for use on open vented systems.

This booklet is an integral part of the appliance. It is therefore necessary to ensure that the booklet is handed to the person responsible for the property in which the appliance is located/ installed. A replacement copy can be obtained from Vokèra customer services. VISION PLUS boiler complies with basic requirements of the

following Directives:

- Regulation (EU) 2016/426;

- Yield directive: Article 7(2) and Annex III of directive 92/42/

EEC;

- Electromagnetic compatibility directive 2014/30/EU;

- Low-voltage directive 2014/35/EU;

- Directive 2009/125/EC Ecodesign for energy-using appliances;

- Regulation (EU) No. 2017/1369 Energy Labelling;

- Delegated Regulation (EU) No. 811/2013;

- Delegated Regulation (EU) No. 813/2013.

At the end of its life, the product should be not be disposed of as solid urban waste, but rather it should be handed over to a differentiated waste collection centre

General layout

1 Safety valve 2 Drain valve 3 Pressure transducer 4 Pump 5 Lower auto air vent 6 De-aeration valve 7 Flow thermistor (NTC) 8 Limit thermostat 9 Main heat exchanger 10 Detection electrode 11 Burner 12 Ignition electrode 13 Ignition transformer 14 Fume analysis cap 15 Top ue outlet 16 Flue sensor 17 Expansion vessel 18 Clapet 19 Fan 20 Mixer 21 Return thermistor 22 Siphon 23 Injector 24 Gas valve 25 Analogue pressure gauge

R Heating return connection F Heating ow connection G Gas connection

Fig. 3

R F G

Page 12

2 DESIGN PRINCIPLES AND OPERATING SEQUENCE

2.1 PRINCIPLE COMPONENTS

• A fully integrated electronic control board featuring electronic temperature control, anti-cycle control, pump over-run, selfdiagnostic fault indicator, full air/gas modulation

• Stainless-steel heat exchanger

• Electronic ignition with ame supervision

• Integral high-head pump

• Fan

• Expansion vessel

• Water pressure transducer

• Flue sensor

• Safety valve

2.2 MODE OF OPERATION (AT REST)

When the appliance is at rest and there are no requests for

heating or hot water, the following functions are active:

• frost-protection system – the frost-protection system protects the appliance against the risk of frost damage for CH. For CH line, if the main temperature falls to 5°C, the appliance will function on minimum power until the temperature on main reaches 35°C.

• anti-block function – the anti-block function enables the pump to be energised for short periods, when the appliance has been inactive for more than 24-hours.

2.3 MODE OF OPERATION

When there is a request for heat and/or hot water via the time clock and/or any external control, the pump and fan are started,

the fan speed will modulate until the correct signal voltage is received at the control PCB. At this point an ignition sequence is enabled. Ignition is sensed by the electronic circuit to ensure ame stability at the burner. Once successful ignition has been achieved, the electronic circuitry increases the gas rate to 75% for a period of 15 minutes. Thereafter, the boiler’s output will either be increase to maximum or modulate to suit the set requirement. When the appliance reaches the desired temperature the burner will shut down and the boiler will perform a three-minute anti-cycle (timer delay).

When the request for heat has been satised the appliance

pump and fan may continue to operate to dissipate any residual heat within the appliance.

2.4 SAFETY DEVICES

When the appliance is in use, safe operation is ensured by:

• a water pressure transducer that monitors system water pressure and will de-activate the pump, fan, and burner should the system water pressure drop below the rated tolerance;

• fan speed sensor to ensure safe operation of the burner;

• a high limit thermostat that over-rides the temperature control circuit to prevent or interrupt the operation of the burner;

• ame sensor that will shut down the burner when no ame

signal is detected;

• ue sensor;

• a safety valve which releases excess pressure from the primary circuit.

Flow temperature

sensor

Expansion

vessel

Safety

valve

Top AAV

Bottom

High limit

thermostat

AAV

Pump

Automatic

by-pass

Drain valve

Main heat

exchanger

Return temperature

sensor

Water transducer

Fig. 4

return

ow

Page 13

2.5 TECHNICAL DATA

Central Heating VISION PLUS 20S VISION PLUS 25S VISION PLUS 30S

Heat input (kW) 20.00 25.00 30.00

Maximum heat output (kW) 60/80°C 19.46 24.38 29.25

Minimum heat output (kW) 60/80°C 3.41 4.65 4.65

Maximum heat output (kW) 30/50°C 21.30 26.95 32.25

Minimum heat output (kW) 30/50°C 3.71 5.08 5.08

Minimum working pressure 0.25-0.45 bar

Maximum working pressure 3.0 bar

Minimum ow rate 350 l/h

Gas Pressures VISION PLUS 20S VISION PLUS 25S VISION PLUS 30S

Inlet pressure (G20) 20.0 mbar 20.0 mbar 20.0 mbar

Heating maximum gas rate (m3/hr) 2.12 2.64 3.17

Minimum gas rate (m3/hr) 0.38 0.52 0.52

Injector size (mm) 4.9 5.7 5.7

Fan speed (G20) VISION PLUS 20S VISION PLUS 25S VISION PLUS 30S

Slow ignition (rpm) 5.500 5.500 5.500

CH maximum number of fan rotation (rpm) 6.200 5.800 6.900

Mimum number of fan rotation (rpm) 1.600 1.700 1.700

Expansion Vessel VISION PLUS 20S VISION PLUS 25S VISION PLUS 30S

Capacity 9 litres

Maximum system volume 74 litres

Pre-charge pressure 1 bar

Dimensions VISION PLUS 20S VISION PLUS 25S VISION PLUS 30S

Height (mm) 740

Width (mm) 420

Depth (mm) 275 350

Dry weight (kg) 37 36 36

Clearances VISION PLUS 20S VISION PLUS 25S VISION PLUS 30S

Sides 2mm*

Top 100mm** from casing or 25mm above ue elbow (whichever is applicable)**

Bottom ^200mm

Front ^^450mm

* It may be necessary to remove adjacent components if component removal/replacement is required ** Consideration should be given to providing reasonable clearance for the insertion

^ This can be reduced to 5mm if a removal panel enables the required 200mm

^^ When installed in a cupboard, this dimension can be reduced to 4mm provided that the

required 450mm is available when the door is opened/removed.

Connections VISION PLUS 20S VISION PLUS 25S VISION PLUS 30S

Flow & return 22mm

Gas 15mm

Safety valve 15mm

Condense 21mm

Electrical VISION PLUS 20S VISION PLUS 25S VISION PLUS 30S

Power consumption (Watts) CH 62 68 79

Voltage (V/Hz) 230/50

Internal fuse 3.15A T (for PCB) - 3.15A F (for connections block)

External fuse 3A

Flue Details (concentric 60-100) VISION PLUS 20S VISION PLUS 25S VISION PLUS 30S

Maximum horizontal ue length (60/100mm) 10.0m 6.0m 6.0m

Maximum vertical ue length (60/100mm) 11.0m 7.0m 7.0m

Flue Details (concentric 80-125) VISION PLUS 20S VISION PLUS 25S VISION PLUS 30S

Maximum horizontal ue length (80/125mm) 25.0m 15.0m 15.0m

Maximum vertical ue length (80/125mm) 26.0m 16.0m 16.0m

Efciency VISION PLUS 20S VISION PLUS 25S VISION PLUS 30S

SEDBUK 2005 (%) 90.04 90.13 90.13

Emissions VISION PLUS 20S VISION PLUS 25S VISION PLUS 30S

CO2 @ maximum output (%) 9.1 9.0 9.1

CO2 @ minimum output (%) 9.0 9.0 9.0

CO @ maximum output (ppm) 130 120 150

CO @ minimum output (ppm) 10 10 10

NOx rating class 6 class 6 class 6

of a FGA probe.

Page 14

Parameter Symbol VISION PLUS

20S

Seasonal space heating energy efficiency class - A A A Water heating energy efficiency class - - - - Rated heat output Pnominal 19 24 29 kW Seasonal space heating energy efficiency ηs 92 92 92 %

Useful heat output

At rated heat output and high-temperature regime (*) P4 19,5 24,4 29,3 kW At 30% of rated heat output and low-temperature

regime (**) P1 6,5 8,1 9,7 kW

Useful efficiency

At rated heat output and high-temperature regime (*) η4 87,1 87,6 87,6 % At 30% of rated heat output and low-temperature

regime (**) η1 96,7 96,5 96,5 %

Auxiliary electricity consumption

At full load elmax 28,0 30,0 41,0 W At part load elmin 14,0 14,0 14,0 W In Stand-by mode PSB 3,0 3,0 3,0 W

Other parameters

Stand-by heat loss Pstby 35,1 38,0 38,0 W Pilot flame energy consumption Pign - - - W Annual energy consumption QHE 53 58 65 GJ Sound power level, indoors LWA 50 50 52 dB Emissions of nitrogen oxides NOx 25 25 43 mg/kWh

For combination heaters

Declared load profile - - -

Water heating energy efficiency ηwh - - - % Daily electricity consumption Qelec - - - kWh Daily fuel consumption Qfuel - - - kWh Annual electricity consumption AEC - - - kWh Annual fuel consumption AFC - - - GJ

(*) High-temperature regime means 60 °C return temperature at heater inlet and 80 °C feed temperature at heater outlet. (**) Low temperature means for condensing boilers 30 °C, for low-temperature boilers 37 °C and for other heaters 50 °C return

temperature (at heater inlet).

VISION PLUS

25S

VISION PLUS

30S

Unit

NOTE (if the outdoor temperature sensor or the control panel, or even both devices, are present in the boiler)

With reference to the Delegated Regulation (EU) No. 811/2013, the information in the table can be used for completing the product data sheet and the labelling for room heating appliances, for mixed heating appliances, for all those appliances for enclosed space

heating, for temperature control devices and solar devices:

ADDED DEVICES CLASS BONUS

OUTDOOR TEMPERATURE SENSOR II 2% CONTROL PANEL* V 3% OUTDOOR TEMPERATURE SENSOR + CONTROL PANEL* VI 4%

(*) Set as ambient regulator

Page 15

2.6 PUMP DUTY

100

150

200

250

300

350

400

450

500

550

600

0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300

Fig. 4 shows the ow-rate available – after allowing for pressure loss through the appliance – for system requirements. When

using this graph, apply only the pressure loss of the system.

Residual head (mbar)

Fig. 4

Flow rate (l/h)

2.7 HOW TO FREE THE PUMP

To “ release” the seized rotator shaft:

- set boiler status to OFF by pressing button 1

- remove the casing as detailed in paragraph “4.7”

- Remove the circulator cap

- With a slotted screwdriver, rotate the shaft being careful not to strain the seat (Fig. 5)

To extract the connector holder, lever with a screwdriver as shown in Fig. 6

- Ret the cap and press key 1 to select the type of operation

desired.

Carry out the operation with extreme caution so as not to damage the components themselves.

Key Location Minimum distance A Below an opening (window, air-brick, etc.) 300 mm

B Above an opening (window, air-brick, etc.) 300 mm C To the side of an opening (window, air-brick, etc.) 300 mm D Below gutter, drain-pipe, etc. 25 mm E Below eaves 25 mm F Below balcony, car-port roof, etc. 25 mm

G To the side of a soil/drain-pipe, etc. 25 mm (60mm for 80/125 - 5” ue) H From internal/external corner 25 mm (60mm for 80/125 - 5” ue)

I Above ground, roof, or balcony level 300 mm J From a surface or boundary facing the terminal 600 mm K From a terminal facing a terminal 1200 mm L From an opening in the car-port into the building 1200 mm M Vertically from a terminal on the same wall 1500 mm N Horizontally from a terminal on the same wall 300 mm P From a structure to the side of the vertical terminal 300 mm

Q From the top of the vertical terminal to the roof ashing As determined by the xed collar

of the vertical terminal R To the side of a boundary 300 mm S To the side of an opening or window on a pitched roof 600 mm T Below an opening or window on a pitched roof 2000 mm V From a vertical terminal to an adjacent opening (window, air-brick, etc.) (call Vokera technical for advice) W From a vertical terminal to an adjacent vertical terminal 300 mm (only if both terminals are the same height)

Fig. 5

Fig. 6

Fig. 7

Page 16

3 GENERAL REQUIREMENTS (UK)

This appliance must be installed by a competent person in accordance with the Gas Safety (Installation & Use) Regulations.

3.1 RELATED DOCUMENTS

The installation of this boiler must be in accordance with the relevant requirements of the Gas Safety (Installation & Use) Regulations, the local building regulations, the current I.E.E. wiring regulations, the bylaws of the local water authority, the Building Standards (Scotland) Regulation and Building Standards (Northern Ireland) Regulations. It should be in accordance also with any relevant requirements of the local authority and the relevant recommendations of the following British Standard Codes of Practice.

ATTENTION

The use of PPE (Personal Protective Equipment) such as but not limited to gloves, mask, safety glasses, etc. is strongly recommended whenever carrying out the installation, repair, or maintenance of this appliance – please pay particular at-

tention to:

• Sharp edges that may be encountered when:- handling or

lifting the appliance, removing parts, etc. during installation and maintenance

• Airborne particles that may be released and/or disturbed when cleaning or removing components during maintenance

• Water treatment chemicals that could have been added to the system water may spill from the appliance and or components during maintenance

Please refer to an appropriate Health and Safety document such as HSE L23 (UK) or S.I. 299 (Ireland), for more detailed advice on safe working practices and procedures.

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.

NOTE

It is recognised that ‘pressure loss’ through the gas cock and gas valve may result in a pressure drop of approximately 2mbar between the gas meter and gas valve inlet test point; this will not impair the performance of the appliance, provided that a dynamic pressure of 18mbar is available at the appliance inlet.

3.4 FLUE SYSTEM

The terminal should be located where the dispersal of combustion products is not impeded and with due regard for the damage and discoloration that may occur to building products located nearby. The terminal must not be located in a place where it is likely to cause a nuisance (see “Fig. 7”). 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 at roofs)

the terminal must be protected by a guard of durable material.

The guard must be tted centrally over the terminal. Refer to

BS 5440 Part 1, when the terminal is 0.5 metres (or less) below plastic guttering or 1 metre (or less) below painted eaves.

3.5 AIR SUPPLY

The following notes are intended for general guidance only.

This appliance is a room-sealed, fan-ued boiler, consequently

it does not require a permanent air vent for combustion air supply. When installed in a cupboard or compartment, ventilation for cooling purposes is also not required.

BS 5440 PART 1 FLUES BS 5440 PART 2 FLUES & VENTILATION BS 5449 PART 1 FORCED CIRCULATION HOT WATER SYSTEMS

BS 5546 INSTALLATION OF GAS HOT WATER SUPPLIES FOR DOMESTIC PURPOSES BS 6798 INSTALLATION OF BOILERS OF RATED INPUT NOT EXCEEDING 60kW BS 6891 LOW PRESSURE INSTALLATION PIPES

BS 7074 PART 1

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 ue and termination.

The location must also permit an adequate air supply for combustion purposes and an adequate space for servicing and air circulation around the appliance. Where the installation of the appliance will be in an unusual location special procedures may be necessary, BS 6798 gives detailed guidance on this aspect. A compartment used to enclose the appliance must be designed

and constructed specically for this purpose. An existing compartment/cupboard may be utilised provided that it is modied

to suit. Details of essential features of compartment/cupboard design including airing cupboard installations are given in BS

6798. This appliance is not suitable for external installation.

3.3 GAS SUPPLY

The gas meter – as supplied by the gas supplier – must be checked to ensure that it is of adequate size to deal with the maximum rated input of all the appliances that it serves. Instal-

lation pipes must be tted in accordance with BS 6891.

APPLICATION, SELECTION, AND INSTALLTION OF EXPANSION VESSELS AND ANCILLARY EQUIPMENT FOR SEALED WATER SYSTEMS

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 ows naturally to drain cocks.

Except where providing useful heat, pipes should be insulated to avoid heat loss and in particular to avoid the possibility of freezing. Particular attention should be paid to pipes passing

through ventilated areas such as under oors, loft space and

void areas.

3.6.2 AUTOMATIC BY-PASS

The appliance has a built-in automatic by-pass, consequently there is no requirement for an external by-pass, however the design of the system should be such that it prevents boiler ‘cycling’.

3.6.3 DRAIN COCKS

These must be located in accessible positions to facilitate draining of the appliance and all water pipes connected to the appliance. The drain cocks must be manufactured in 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 lling of the system.

Page 17

3.6.5 EXPANSION VESSEL

control

pipe

The appliance has an integral expansion vessel to accommodate the increased volume of water when the system is heated. It can accept up to 9 litres of expansion from within

the system, generally this is sufcient, however if the system

has an unusually high water content, it may be necessary to provide additional expansion capacity (see 7.20).

3.6.6 FILLING POINT

A method for initial lling of the system and replacing water lost

during servicing etc. directly from the mains supply, is required (see “Fig. 17”). This method of lling should comply with the current Water Supply (Water Fittings) Regulations 1999 and Water Bylaws 2000 (Scotland). If an alternative location is preferred, it should be connected as detailed in Fig. 8.

3.6.7 LOW PRESSURE SEALED SYSTEM

An alternative method of lling the system would be from an independent make-up vessel or tank mounted in a position at least 1 metre above the highest point in the system and at least 5 metres above the boiler (see “Fig. 9”).

The cold feed from the make-up vessel or tank must be tted

with an approved non-return valve and stopcock for isolation purposes. The feed pipe should be connected to the return pipe as close to the boiler as possible.

3.6.8 FREQUENT FILLING

Frequent lling or venting of the system may be indicative

of a leak. Care should be taken during the installation of the appliance to ensure all aspects of the system are capable of withstanding pressures up to at least 3 bar.

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 fused spur with a contact separation of at least 3,5mm (3° high-voltage category). The switch must only supply the appliance and its corresponding controls, i.e. time clock, room thermostat, etc. Alternatively an un-switched shuttered socket with a fused 3-pin plug both complying with BS 1363 is acceptable.

NOTE

Vokera Ltd. cannot guarantee the performance or reliability of the appliance if/when it is supplied via an invertor or generator;

in particular those that incorporate a ‘oating’ earth or ‘modied’

sine wave.

Warning!

This appliance must be earthed.

3.8 MOUNTING ON A COMBUSTIBLE SURFA

The appliance can be mounted on a wall of combustible ma-

terial without any requirement to t any additional protective (re-resistant) material.

3.9 TIMBER FRAMED BUILDINGS

If the appliance is to be tted in a timber framed building, it should be tted in accordance with the Institute of Gas Engineers

publication (IGE/UP/7) ‘Guide for Gas Installations in Timber Frame Buildings’.

3.10 WATER TREATMENT

Vokèra recommend that an inhibitor - suitable for use with stainless-steel 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. Vokera recommend that water treatment be carried out in accordance with the Benchmark Guidance on water treatment in central heating systems. If water treatment products are to be used, then they must be entirely suitable for use with an stainless steel heat exchanger. Any water treatment product, must be administered in strict accordance with the manufacturer’s instructions.

If the appliance is to be installed to an existing system; water

treatment and ushing of the complete heating system should

be carried out in accordance with BS 7593 and the Benchmark Guidance on water treatment in central heating systems.

valve

double

check- valve

supply

Stopcock

5.0 metres minimum

Heating return

ow pipe

Fig. 8

Automatic air-vent

Fig. 9

control valve

temporary connection

Make-up vessel or tank

Non-return

valve

3E GENERAL REQUIREMENTS (EIRE)

This appliance must be installed by a competent person in

accordance with and dened by, the Standard Specication

(Domestic Gas Installations) Declaration (I.S. 813).

3.1E 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.

ATTENTION

to:

• Sharp edges that may be encountered when:- handling or

lifting the appliance, removing parts, etc. during installation and maintenance

•

Airborne particles that may be released and/or disturbed when cleaning or removing components during maintenance

• Water treatment chemicals that could have been added to the system water may spill from the appliance and or components during maintenance

Please refer to an appropriate Health and Safety document such as HSE L23 (UK) or S.I. 299 (Ireland), for more detailed advice on safe working practices and procedures.

3.2E LOCATION OF APPLIANCE

The appliance may be installed in any room or internal space, although particular attention is drawn to the requirements of 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

the

Page 18

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 ue and termination. The location must

also permit an adequate air supply for combustion purposes and an adequate space for servicing and air circulation around the appliance. Where the installation of the appliance will be in an unusual location special procedures may be necessary, refer to I.S. 813 for detailed guidance on this aspect. A compartment used to enclose the appliance must be designed and constructed specically for this purpose. An existing compart-

ment/cupboard may be utilised provided that it is modied to suit. This appliance is not suitable for external installation.

3.3E 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 tted in accordance with I.S. 813.

Pipe work from the meter to the appliance must be of adequate size. Pipes of a smaller size than the appliance gas inlet connection must not be used. The installation must be tested for tightness in accordance with I.S. 813. If the gas supply serves more than one appliance, it must be ensured that an adequate supply is maintained to each appliance when they are in use at the same time.

NOTE

3.4E 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 at roofs) the terminal

must be protected by a guard of durable material. The guard must

be tted centrally over the terminal. Refer to I.S. 813, when the

terminal is 0.5 metres (or less) below plastic guttering or 1 metre (or less) below painted eaves.

3.5E AIR SUPPLY

The following notes are intended for general guidance only.

This appliance is a room-sealed, fan-ued boiler, consequently it

does not require a permanent air vent for combustion air supply. When installed in a cupboard or compartment, ventilation for cooling purposes is also not required.

3.6E WATER CIRCULATION

Specic recommendations are given in I.S. 813. The following notes

are for general guidance only.

3.6.1E 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 car-

ried naturally to air release points and that water ows naturally to

drain cocks. Except where providing useful heat, pipes should be insulated to avoid heat loss and in particular to avoid the possibility of freezing. Particular attention should be paid to pipes passing through ventilated

areas such as under oors, loft space and void areas.

3.6.2E 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’.

3.6.3E DRAIN COCKS

These must be located in accessible positions to facilitate draining of the appliance and all water pipes connected to the appliance.

3.6.4E 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 lling of the system.

3.6.5E EXPANSION VESSEL

The appliance has an integral expansion vessel to accommodate the increased volume of water when the system is heated. Refer to

the specication table for more detailed information.

3.6.6E FILLING POINT

A method for initial lling of the system and replacing water lost during servicing etc. directly from the mains supply, should be provided (see

Fig. 8

). This method of lling complies with the current Water Supply (Water Fittings) Regulations 1999 and Water Bylaws 2000 (Scotland).

3.6.7E LOW PRESSURE SEALED SYSTEM

tank must be tted with an approved non-return valve and stopcock

for isolation purposes. The feed pipe should be connected to the return pipe as close to the boiler as possible.

3.6.8E FREQUENT FILLING

Frequent lling or venting of the system may be indicative of a

leak. Care should be taken during the installation of the appliance to ensure all aspects of the system are capable of withstanding pressures up to at least 3 bar.

3.7E 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 doublepole switch fuse spur with a contact separation of at least 3,5 mm (3° high-voltage category). The switch must only supply the appliance and its corresponding controls, i.e. time clock, room thermostat, etc.

NOTE

Vok

era Ltd. cannot guarantee the performance or reliability of the appliance if/when it is supplied via an invertor or generator; in particular those that incorporate a ‘oating’ earth or ‘modied’ sine wave.

3.8E MOUNTING ON A COMBUSTIBLE SURFACE

The appliance can be mounted on a wall of combustible material

without any requirement to t any additional protective (re-resistant)

material.

3.9E TIMBER FRAMED BUILDINGS

If the appliance is to be tted in a timber framed building, it should be tted in accordance with I.S. 813 and local Building Regulations.

The Institute of Gas Engineers publication (IGE/UP/7) ‘Guide for

Gas Installations in Timber Frame Buildings’ gives specic advice

on this type of installation.

3.10E WATER TREATMENT

Vokèra recommend that an inhibitor - suitable for use with stainlesssteel 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. Vokera recommend that water treatment be carried out in accordance with the Benchmark Guidance on water treatment in central heating systems. If water treatment products are to be used, then they must be entirely suitable for use with an stainless-steel heat exchanger. Any water treatment product, must be administered in strict accordance with the manufacturer’s instructions.

If the appliance is to be installed to an existing system; water treat-

ment and ushing of the complete heating system should be carried

out in accordance with BS 7593 and the Benchmark Guidance on water treatment in central heating systems.

3.11E DECLARATION OF CONFORMITY

A Declaration of Conformity (as dened in I.S. 813) must be provided on completion of the installation. A copy of the declaration must be given to the responsible person and also to the gas supplier if required.

Page 19

4 INSTALLATION

NOTE

Please refer to 3 - 3E and use the appropriate PPE when carrying out any of the actions or procedures contained within this section.

4.1 PREPARATION FOR MOUNTING THE APPLIANCE

The appliance should be mounted on a smooth, vertical 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. 10”) and ue-hole (if applicable).

Fig. 10

Horizontal ue terminals and accessories

Part No. Description Length

20122759 Standard horizontal ue Kit 900mm 20122761 Telescopic ue kit 700mm 20132059 90-degree bend N/A 20132058 45-degree bend (2) N/A

20132060 500mm extension 500mm 20132061 1000mm extension 1000mm 20132062 2000mm extension 2000mm 20131979 telescopic extension 372/519mm 522 plume management kit 1370mm 20135587 100mm ue brackets (5) N/A

Fig. 10: Using the template provided (A), mark and drill a 125mm hole for the passage of the  ue pipe. The hole should be drilled to ensure any condense  uid that forms, is allowed to drain back to the appliance. The xing holes for the wall-mounting

bracket should now be drilled and plugged, an appropriate type

and quantity of  xing 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.

4.2.2 FITTING THE TELESCOPIC HORIZONTAL FLUE KIT

In some instances it may necessary to cut the inner 60mm pipe

of the ue bend at the point indicated (Fig. 12 - pos. A) to allow for easier insertion to the boiler ue spigot.

4.2 FITTING THE FLUE

This appliance incorporates a ‘click-t’ ue connection at the top of the appliance.

4.2.1 CONCENTRIC HORIZONTAL FLUE

These instructions relate specically to the installation of this appliance with the Vokera 60/100mm ‘X-type’ (click-t) ue terminals accessories. For specic instructions on installing this appliance with an alternative Vokera ue system, e.g. 80/125mm; please refer to the instructions supplied with the specic ue

system, or download the instructions from the Vokera website.

The appliance ue outlet elbow can be rotated through 360º on its vertical axis. In addition the ue may be extended from the

outlet elbow in the horizontal plane. A reduction must also be made to the maximum length (see table below) when

additional bends are used.

Fig. 11

4.2.3 FITTING THE HORIZONTAL FLUE KIT

Carefully measure the distance from the centre of the appliance

ue outlet to the edge of the nished outside wall (dimension

X). Add 65mm to dimension X to give you Dimension Y (see Fig. 13). Measure dimension Y from the terminal end of the

concentric ue pipe and cut off the excess ensuring any burrs are removed. Pass the concentric ue pipe through the previously drilled hole. Fit the ue bend to the boiler ue outlet and insert the concentric ue pipe into the ue bend ensuring the correct

seal is made.

NOTE (Fig. 15): The appliance incorporates a ‘click-t’ ue

connection. Ensure that both screws ‘C’ on the ‘click-t’ have been slackened off. Ensure that the connector is correctly aligned

with the ‘click-t’ and insert it into the ‘click-t’ until it clicks into

position (this is when the tabs at points ‘A’ are located in the groove of the ue bend connector). Both screws (C) should now be tightened.

Reduction for additional bends

Bend Reduction in maximum ue length for each bend

45º bend 1.0 metre 90º bend 1.0 metre

Page 20

Fig. 12

Fig. 13

4.2.4 EXTENDING THE FLUE

Connect the bend – supplied with the terminal kit – to the top of the boiler using clamp (supplied). The additional bends &

extensions have push-t connections, care should be taken

to ensure that the correct seal is made when assembling the

ue system. Connect the required number of ue extensions or bends (up to the maximum equivalent ue length) to the ue

terminal (Fig. 14). The ue system should have a 3º rise from the boiler to outside, to ensure any condense uid that forms,

is allowed to drain back to the appliance.

NOTE

When cutting an extension to the required length, you must ensure that the excess is cut from the plain end of the extension (Fig. 15). Remove any burrs, and check that all seals are

located properly. You must ensure that the entire ue system is properly supported and connected. Seal the ue assembly to

the wall using cement or a suitable alternative that will provide

satisfactory weatherproong. The interior and exterior trim can now be tted.

4.5.2 CONCENTRIC VERTICAL FLUE

Using Fig. 15 as a reference, cut a 110mm diameter hole in

the roof and/or ceiling to facilitate the route of the vertical ue

system. NOTE: ensure that the top of the appliance - if already in position - is covered and protected from the possibility of any

dust or debris falling or entering the appliance via the ue outlet. Fit the appropriate ashing to the roof and insert the vertical ue

terminal through the ashing from outside, ensuring that the collar of the terminal is located over the outlet of the ashing.

The xing holes for the appliance wall mounting bracket should

now be drilled and plugged. An appropriate type and quantity

of xing 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.

If the vertical ue system requires additional extensions or bends, connect these to the vertical terminal, ensuring the following:

- the maximum permitted ue length is not exceeded

- reductions to the maximum ue length have been made for any bends that are used on the vertical ue system

- any horizontal sections of the ue system, incorporate a

3-degree fallback to the appliance

- the entire ue system is fully supported and secured using

the appropriate brackets

- if/when an extension is cut to a shorter length, ensure that the excess length is cut from the plain end of the extension, and that any burrs or rough edges are removed

- all seals are properly located before assembling or connecting

the ue system.

IMPORTANT: The VX ue terminal is supplied with a sachet of

silicone lubricant; smear a small amount of the lubricant around both inner and outer connections, at both ends of the vertical

ue connector (supplied with the VX terminal).

NOTE (Fig. 15): The appliance incorporates a ‘click-t’ ue

connection. Ensure that both screws ‘C’ on the ‘click-t’ have been slackened off. Ensure that the connector is correctly aligned

with the ‘click-t’ and insert it into the ‘click-t’ until it clicks into

position (this is when the tabs at points ‘A’ are located in the groove of the vertical ue connector). Both screws (C) should now be tightened.

NOTE: If more convenient, the vertical ue connector can be attached to the vertical ue terminal/extension before connecting

it to the appliance.

NOTE: If more convenient, the vertical ue connector can be attached to the vertical ue terminal/extension before connecting

it to the appliance.

NOTE

Additional bends and/or extensions can be connected to the terminal connector if desired, however if additional bends are

tted, a reduction must be made to the maximum ue length

(see table below).

vertical

connection

Fig. 14

ange installed

as standard

Fig. 15

Reduction for bends

Bend Reduction in maximum ue length for each bend

45º bend 1.0 metre 90º bend 1.0 metre

Page 21

Vertical Flue Terminals & Accessories

Code Description Length

20122763 Vertical Flue Kit 1000mm 20132059 90-degree bend N/A 20132058 45-degree bend (2) N/A 20132060 500mm extension 500mm 20132061 1000mm extension 1000mm 20132062 2000mm extension 2000mm 20131979 telescopic extension 372/519mm 20135587 100mm ue brackets (5) N/A 20132050 pitched roof ashing N/A 20135582 at roof ashing N/A

IMPORTANT

The vertical ue terminal is 1.0 metre in length and cannot be

cut; therefore it may be necessary to adjust the height of the appliance to suit or use a suitable extension.

Fig. 16

4.3

CONNEC

The appliance is s service valves. The service valves are of the compression type.

The accessory pack contains sealing washers’ etc, for use with the service valves. When connecting pipe work to the valves, tighten the

compression end rst 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.

4.3.1 GAS

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.

4.3.2 FLOW & RETURN

The appliance is supplied with 22mm service valves for the ow and

return connections, connect a 22mm pipe to the inlet of each valve and tighten both nuts.

NOTE

Depending on system requirements, it may necessary to increase the

size of the ow & return pipe work after the service valve connections.

TING THE GAS AND

upplied with an accessory

TER (“FIG. 17”)

pack that includes

4.3.3 SAFETY VALVE

Connect the safety valve connection pipe to the safety valve outlet and tighten. The discharge pipe must have a continuous fall away from the appliance to outside and allow any water to drain away thereby eliminating the possibility of freezing. The discharge pipe must terminate in a position where any water - possibly boiling - discharges safely without causing damage or injury, ut is still visible.

Safety valve

outlet

C/H ow

valve

C/H return valve

Fig. 17

4.3.4 CONDENSE PIPE

This appliance will - under normal operating conditions - produce con-

densate uid that will require to be disposed of via the dwelling’s waste

water drainage system. Vokera strongly recommends that the condensate pipe is connected to the internal waste water pipework in accordance with BS6798. BS6798 provides comprehensive instruction and advice on all permissible condensate disposal methods; notwithstanding this, it is essential that the

following is strictly adhered to:

Use only plastic drainage pipe (minimum OD of 21.5mm) Horizontal runs must incorporate a minimum 45mm fall per metre, away from the appliance External pipework and/or pipework in unheated areas, must have a minimum OD of 32mm and be insulated with Class-O pipe insulation The route, type, and termination of the condensate disposal method,

must not permit any spillage of condensate uid, into the dwelling in the

event of a blockage or freezing of the condensate pipework. Should it not be possible to route and terminate the condensate pipework internally using ‘gravity discharge’; Vokera recommends that the Vokera condensate pump (code 404) be considered as an alternative solution. Ensure that the end-user is aware of the effect/consequences of the condensate pipework becoming blocked or frozen.

Gas

cock

4.4 INSTALLATION OF CONDENSATE DRAIN PIPE

Before starting the boiler, even just temporarily, the SRD device supplied must be installed. The manufacturer does NOT accept liability for damage to persons or objects caused by the boiler operating without the SRD device being installed correctly.

For the installation proceed as follows:

- remove the plug (T) from the siphon

- x the SRD device to the siphon, placing the gasket in-between, screwing it on all the way and checking its seal

- -connect the condensate discharge pipe supplied as standard with the product, then drain the

- condensate into a suitable drainage system in compliance with current norms.

If it is not possible to t the SRD device due to the interference with other objects under the boiler, it is possible to t it in a different posi-

tion by inserting a connecting pipe the siphon in order to provide a fully airtight seal. The SRD device should always be positioned VERTICALLY in order to ensure it functions correctly.

between the SRD device and

Page 22

Fig. 18

4.5

INSTRUCTION FOR CONDENSATION EXHAUST CONNECTION

This product is designed to prevent the escape of gaseous products of combustion through the condensation drain pipe with which it is equipped, this is obtained by using a special

siphon placed inside the appliance.

All components of the product condensation drain system must be properly maintained in accordance with

the manufacturer instructions and cannot be modied

in any way.

The

condensation exhaust system downstream of the appliance (1) must comply with the relevant legislation and standards. The construction of the condensation exhaust system downstream of the appliance is the responsibility of the installer. The condensation exhaust system must be dimensioned and installed in such a way as to guarantee the correct evacuation of the condensation produced by the appliance and/or collected by the evacuation systems of combustion products. All the components of the condensation exhaust system must be made in a workmanlike manner using materials that are suitable for withstanding the mechanical, thermal and chemical stresses of the condensation produced by the appliance over time.

Note: If the condensation exhaust system is exposed to the

risk of frost, always provide an adequate level of insulation of the pipe and consider any increase in the diameter of the pipe itself. The condensation exhaust pipe must always have an adequate slope level to prevent the condensation from stagnating and its proper drainage. The condensation exhaust system must have an inspectable disconnection (2) between the condensation exhaust pipe of the appliance and the condensation exhaust system. The disconnection must be such as to ensure an atmospheric connection between the inside of the condensation exhaust system pipe and the environment in order to avoid that the downstream exhaust pipe of the product can take on positive or negative pressure with respect to the environment itself. “Fig. 19”: example of a connection between the condensation exhaust pipe (3) and the exhaust system (4).

4.6 ELECTRICAL CONNECTIONS

The boler is supplied with a short y-lead. This lead can be used for connection to the electrical supply. Connect the y-lead to a fused plug or fused isolator in the following way:

• brown wire to LIVE supply

• blue wire to NEUTRAL supply

• green/yellow to EARTH connection. Insert the supplied 3-AMP fuse into the fused isolator or fused plug.

Should the y-lead be unsuitable, refer to 4.8 for details on how to

connect the electrical supply directly to the boiler.

The electrical supply must be as specied in section ed electrician should connect the appliance to the electrical supply.

If controls - external to the appliance - are required, a competent person must undertake the design of any external electrical circuits, please refer to section 8 for detailed 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 exible seized 0.75mm

to BS 6500 or equivalent. Wiring to the appliance must be rated

for operation in contact with surfaces up to 90 ºC.

3 - 3E.

A quali-

4.7 CASING REMOVAL

To gain internal access to the appliance you must rst remove the casing, proceed as outlined below:

• locate and unscrew the 2-screws (A) that secure the outer casing to the appliance

• lift the casing upward to disengage it from the top locating hooks and then remove

• store the casing and screws safely until required. Re-t in the reverse order

• remove the screw below the control fascia and gently lower it until it rests.

Fig. 20

4.8 CONNECTING THE MAINS (230V) INPUT

Unhook and remove the terminal block cover (230V). Pass the cable through the cable anchorage point. Connect the supply cable wires (LIVE, NEUTRAL, & EARTH) to their corresponding terminals (L, N, & E) on the appliance – high voltage – terminal block. When connecting the EARTH wire, ensure that it’s left slightly longer that the others, this will prevent strain on the EARTH wire should the cable become taut. Do not remove the link wire

unless additional external controls are to be tted (see section

“8 CHECKS, ADJUSTMENTS AND FAULT FINDING”

electrical supply via the cable entry/exit point and secure using the cable anchorage grip and screws.

)route the

Fig. 19

NOTE

It is the installer’s responsibility to ensure that the appliance is properly Earthed. Vokèra Ltd. cannot be held responsible for any

damages or injuries caused as a result of incorrect Earth wiring

Page 23

5 OPERATION

Reset

NOTE

Please refer to 3 - 3E and use the appropriate PPE when carrying out any of the actions or procedures contained within this section. Ensure that steps 6.1 through to 6.6 have been completed before supplying the gas and electrical supply to the appliance.

5.1 ACCESS TO THE PARAMETERS

Pressing the MENU key for at least 2 sec provides access to the P1 menu, allowing the parameters to be programmed. If

the menu is empty, P8.04 is displayed, otherwise the rst item

in the menu appears.

Access to the TECHNICAL parameters programming menu is password protected; pressing MENU a second time for at least 2sec, PWD is displayed blinking with a frequency of

0.5sec ON and 0.5sec OFF for 2sec.

Then <<0000>> is displayed blinking with a frequency of

0.5sec ON and 0.5sec OFF; the icons , , and come on to allow the password to be entered.

5.2 CONTROL PANEL

Your boiler is equipped with a large LCD display that indicates the appliance operating status.

RESET

1 2 31 2 3

A+C

1 2

1+3 2+3

hen the arrow is highlighted it has the conrm function

CONFIGURATION/STEP-BACK/RETURN

It is normally used to raise the heating water temperature, when the arrow is highlighted you can move inside the P1 menu

It is normally used to lower the heating water temperature, when the arrow is highlighted you can move inside the P1 menu

Access to the menu for setting the clock (see paragraph ““5.4

STARTING THE BOILER””) Used to change the operating status of the boiler (OFF and

WINTER)

Used to reset the alarm status or to interrupt the vent cycle

Used to access the INFO and P1 menus. When the icon

is shown on the display, the key has the ENTER func-

tion and is used to conrm the value set during the programming of a technical parameter

Lock and unlock keys

When the boiler is set to OFF it is used to start the combustion analysis function (CO)

There are two levels of access to the parameters:

- INSTALLER

- SERVICE (the user level does not require a password).

Set the password supplied by the manufacturer for the desired access level using the button at the , arrows to enter the value. Press the key A at the arrow to conrm.

Pressing key B at the arrow returns you to the previous level, exiting the P1 menu.

It is now possible to navigate the menu using the C and D

arrow keys, conrming access to the sub-menu with arrow key

A or else returning to the previous level using arrow key B. Prolonged pressure at any point of the menu (>2sec) of the key returns you to the main page. The interface also reverts automatically to the main screen if no key is pressed within 60sec.

Indicates the connection to a remote device (OT or RS485)

Indicates the connection to a WIFI device

Indicates the presence of an outdoor temperature sensor

Indicates the connection to a heat pump (not used on this model)

Icon that lights up when there is an alarm

It comes on when there is a fault together with the icon , except for ame and water alarms

Indicates the presence of a ame, in the event of a ame lockout the icon looks like It comes on when there are alarms that require a manual

reset by the operator It comes on when there is an operation conrmation

request When the icon is active, it indicates that the "conrm”

function of button A is active When the icon is active, it indicates that the "back/cancel”

function of button B is active

When the icon is active, it is possible to navigate the menu or raise the value of the selected parameter

Page 24

When the icon is active, it is possible to navigate the menu or lower the value of the selected parameter

The icon comes on if central heating is active, it blinks if a heating request is in progress

They indicate the set point level set (1 notch minimum value, 4 notches maximum value)

1 2 3 4 5 6 7

AUTO

Indicates the days of the week

Only if clock has been enabled

MAN ON Only if clock has been enabled

MAN OFF Only if clock has been enabled

5.3 SETTINGS MENU TREE STRUCTURE

Below is a list of the parameters that can be programmed; if the adjustment board does not support the relative function, the interface returns an error message. Some of the information might not be available depending on the access level, the status of

the machine or the system conguration.

Menu Parameters

P1.01 LANGUAGES

P1.02 TIME USER

P1.03 TIME PROGRAMM NOT AVAILABLE ON THIS MODEL

P1.05 SCROLLING 0 / 1 USER

P3 CONFIGURATION

P3.01

P3.02

P3.03 AUTO FILL ENABLE 0 / 1 SERVICE 0

P3.04 BEGIN SYSTEM FILLING NOT AVAILABLE ON THIS MODEL

P3.05 AIR PURGING CYCLE 0 / 1 SERVICE 1

P3.06 MIN FAN SPEED 1.200-3.600 INSTALLER

P3.07 MAX FAN SPEED 3.700-9.999 INSTALLER

P3.08 SOFT IGNITION MIN - MAX INSTALLER

P3.09 MAX FAN SPEED HTG MIN - MAX INSTALLER

P3.10 RANGE RATED MIN - MAX_CH INSTALLER

P3.11 CONFIG AUX 1 0 / 1 / 2 INSTALLER 0

P3.12 EXHAUST PROBE RESET 0 / 1 INSTALLER 0

P4 HEATING

P4.01

P4.02

P4.03

P4.04

P4.05 PUMP CONTROL TYPE 41-100 INSTALLER 85

P4.08 OT CASCADE CONTROL

P4.09 SCREED FUNCTION 0 / 1 INSTALLER 0

P4.10 ANTI CYCLE FUNCTION 0 - 20min INSTALLER 3min

P4.11 RESET CH TIMERS 0 / 1 INSTALLER 0

P4.12

P4.13 MAIN ZONE ADDRESS 1 - 6 INSTALLER 3

P4.14

P4.15 MAIN ZONE TYPE 0 / 1 INSTALLER 0

Scrolling message

only if parameter P1.05 = 1

SETTINGS

HYDRAULIC CONFIGURATION

WATER PRESSURE TRANSDUCER

HYST OFF HIGH TEMP

HYST ON HIGH TEMP

HYST OFF LOW TEMP

HYST ON LOW TEMP

MAIN ZONE ACTUATION TYPE

MAIN ZONE HYDRAULIC CONF

Value

0 IT 1 RO 2 FR 3 EN 4 SR 5 HR

0 / 1 / 2 / 3 / 4 INSTALLER 0

0 / 1 SERVICE 1

2 - 10 SERVICE 5

2 - 10 SERVICE 3

NOT AVAILABLE ON THIS

0 / 1 INSTALLER 0

6 ES 7 EL 8 BG 9 PL 10 SL

MODEL

Password

level

USER

Value set

in the factory

see technical data

table

see technical data

table

see technical data

table

see technical data

table

see technical data

table

Personalised

values

Page 25

Menu Parameters

Scrolling message

only if parameter P1.05 = 1

Value

Password

level

Value set

in the factory

Personalised

values

P4.16 MAX CH SET

P4.17 MIN CH SET

P4.18 WEATHER COMP ENABLE 0 / 1 INSTALLER 0

P4.19 WEATHER COMP CURVE

P4.20 NIGHT COMPENSATION 0 / 1 INSTALLER 0

P4.21 CH CLOCK ENABLE DON’T MODIFY INSTALLER 0

P4.22 MODE SELECTION DON’T MODIFY INSTALLER 0

P4.23 ZONE1 ENABLE 0 / 1 INSTALLER 0

P4.24 ZONE1 ADDRESS 1 - 6 INSTALLER 1

P4.25

P4.26 ZONE1 TYPE 0 / 1 INSTALLER 0

P4.27 ZONE1 SET

P4.28 ZONE1 MAX CH SET

P4.29 ZONE1 MIN CH SET

P4.30 ZONE1 OTR 0 / 1 INSTALLER 0

P4.31 ZONE1 OTD CURVES

P4.32 ZONE1 NIGHT COMP 0 / 1 INSTALLER 0

P5 DHW

P5.11

P7 SERVICE

P7.06

P7.07

P8 CONNECTIVITY

P8.01 BUS 485 CONFIG 0 / 1 / 2 SERVICE 0

P8.03 OT CONFIG 0 / 1 SERVICE 1

ZONE1 HYDRAULIC CONFIG

DHW ENHANCED FUNCTION

AUTOSTOP FUNCTION

SERVICE EXPIRY

AT: MIN CH SET - 80.5 BT: MIN CH SET - 45.0

AT: 40 - MAX CH SET BT: 20 - MAX CH SET INSTALLER

1.0-3.0

0.2-0,8

0 / 1 INSTALLER 0

ZONE1 MIN CH SET ZONE1 MAX CH SET

AT: ZONE1 MIN CH SET - 80,5 BT: ZONE1 MIN CH SET - 45,0

AT: 40 - ZONE1 MAX CH SET BT: 20 - ZONE1 MAX CH SET

1.0-3.0

0.2-0.8

0 - 255 (

AT BT

NOT AVAILABLE ON THIS

refer to AUTOSTOP funcition

Contact Vokera Technical for further advice

INSTALLER

INSTALLER 2.0

USER 40 - 80.5

INSTALLER 80.5

INSTALLER 40

INSTALLER 2.0

MODEL 0

)

80.5

5.4 STARTING THE BOILER

Ensure that steps 6.1 through to 6.6 have been completed before supplying the gas and electrical supply to the appliance.

- Position the system’s master switch to the “on” position.

If necessary, the interface automatically goes to the clock menu. On the main screen the icons , , and and

ENTER come on while 00:00 is displayed with the rst two

digits blinking with a frequency of 0.5 sec ON, 0.5 sec OFF.

To set the tim

 set the hour with the and arrows, then conrm with A  set the minutes with the and arrows, then conrm

with B

 set the day of the w

segment in line with the day selected blinks, press the MENU key at the icon setting. The clock blinks for 4sec and then returns to the main screen

e and day follow the following instructions:

eek with the and arrows. The

to conrm the time and day

 to exit the time programming without saving the modied

values just press .

NOTE: It is possible to change the TIME and DAY settings

also later by accessing the P1.02 parameter in the P1 menu, or by pressing the A+C keys for at least 2sec.

RESET

 If you need to set the language, select the menu P1 and con-

rm your choice using .

 Use the arrows to display parameter P1.01, then enter the

submenu by pressing .

 Use the and buttons to set the desired language

– see “

“5.3 SETTINGS MENU TREE STRUCTURE””

conrm your choice, press

. To

Page 26

Each time that the boiler is powered a vent cycle is carried out lasting 4 min. The display shows the message -AIR lighting up the icon RESET.

P3.06

This parameter allows you to change the minimum number of the fan's rpm.

P3.07

This parameter allows you to change the maximum number of the fan's rpm.

P3.08

This parameter allows you to change the soft ignition value.

P3.09

To interrupt the vent cycle press RESET. Set the boiler to OFF by pressing .

This parameter allows you to change the maximum number of the fan's rpm in heating mode.

Do not change!

P3.10

This parameter allows you to change the heat output in heating mode, the factory setting for this parameter is P3.09 and can be programmed within the P3.06 - P3.09 range. For more information about the use of this parameter see the paragraph “8.12 Range rated”.

P3.11

This parameter allows you to congure the operation of an additional relay (only if the relay board is installed (not supplied as standard)) to bring a phase (230Vac) to a second heating pump (additional pump) or a zone valve. The factory setting for this parameter is 0 and can be set within the 0 - 2 range with the following meaning:

5.5 BOILER CONFIGURATION

To access the boiler conguration menu, access the technical parameters menu, as indicated in the paragraph Use the and arrows to scroll through the parameters of the preselected sub-menu, conrming the selection with A; change the value of the pre-selected parameter with C and D conrming the selection with the key indicated by the icon

Description of the settings menu

Some of the following functions might not be available depending on the access level and the type of machine.

P1 (SETTINGS menu)

P1.01

Select the parameter to set the desired language (see the tree-view menu in paragraph

“5.3 SETTINGS MENU TREE STRUCTURE”

P1.02

From this menu the time and the number of the day of the week can be adjusted.

P1.03

P1.05

This parameter allows you to enable scrolling text after the parameter

code itself:

0= OFF 1= ON

P3 (CONFIGURATION menu)

P3.01

This parameter allows you to set the type of hydraulic conguration of the boiler:

0 = ONLY HEATING 1 = INSTANTANEOUS FLOWSWITCH 2 = INSTANTANEOUS FLOWMETER 3 = STORAGE CYLINDER WITH PROBE 4 = STORAGE CYLINDER WITH THERMOSTAT The factory setting for this parameter is 0. When replacing the electronic board make sure that this parameter is set to 0.

P3.02

This parameter allows you to set the type of water pressure transducer:

0 = water pressure switch 1 = pressure transducer The factory setting for this parameter is 1 do not change! When replacing the electronic board make sure that this parameter is set to 1.

P3.03

This parameter allows you to enable the “semi-automatic lling” function since the boilers have a pressure transducer and a lling solenoid valve

installed. The factory setting for this parameter is 0, do not change! When replacing the electronic board make sure that this parameter is set to 0.

P3.04

This only appears if P3.03=1. NOT AVAILABLE ON THIS MODEL

P3.05

This parameter allows you to disable the vent cycle function; the factory setting is 1, set the parameter to 0 to disable the function.

“5.1 Access to the parameters”

P3.12

This parameter allows operating hours meter to be reset in certain conditions (see “8.14 Lights and faults” for more information, E091 faults). The factory setting for this parameter is 0, set to 1 to reset the ue gas probe hours meter after the primary heat exchanger has been cleaned. Once the reset procedure is nished, the parameter returns automatically to 0.

P4 (HEATING menu)

P4.01

For high temperature systems, this parameter allows you to set the hysteresis value used by the adjustment board for calculating the switching off delivery temperature of the burner: SWITCHING OFF TEMPERATURE = HEATING SETPOINT + P4.01.

The factory setting for this parameter is 5°C, it can be changed within the 2 - 10°C range.

P4.02

For high temperature systems, this parameter allows you to set the hysteresis value used by the adjustment board for calculating the ignition delivery temperature of the burner: IGNITION TEMPERATURE = HEATING SETPOINT - P4.02. The factory setting for this parameter is 5°C, it can be changed within the 2 - 10°C range.

P4.03

For low temperature systems, this parameter allows you to set the hysteresis value used by the adjustment board for calculating the switching off delivery temperature of the burner: SWITCHING OFF TEMPERATURE = HEATING SETPOINT + P4.03. The factory setting for this parameter is 3°C, it can be changed within the 2 - 10°C range.

P4.04

For low temperature systems, this parameter allows you to set the hysteresis value used by the adjustment board for calculating the ignition delivery temperature of the burner: IGNITION TEMPERATURE = HEATING SETPOINT - P4.04. The factory setting for this parameter is 3°C, it can be changed within the 2 - 10°C range.

P4.05

Not used on this model.

P4.08

This parameter allows you to set the boiler for cascade applications via an OTBus signal. Not applicable to this model of boiler.

P4.09

Not available on this model.

P4.10

This parameter allows you to change the FORCED HEATING TIMING OFF, regarding the delay time introduced for re-igniting the burner in the face of an off due to the heating temperature being reached. The factory setting for this parameter is 3 minutes and can be set to a value between 0 min and 20 min.

P4.11

This parameter allows you to cancel the ANTI CYCLE and REDUCED HEATING MAXIMUM OUTPUT TIMING, lasting 15 min during which the speed of the fan is limited to 75% of the maximum heating output that has been set. The factory setting for this parameter is 0, set 1 to reset the timings.

P4.12

This parameter allows you to congure the system to manage a mixing valve and an additional pump on the main heating system (the use of the BE16 accessory board is required, not supplied as standard). The factory setting for this parameter is 0, set to 1 for the connection of a BE16 board. Note: this parameter cannot be changed when an OTBus chronothermostat is connected.

Pin 1 and 2 of X21 Not present Jumpered

P3.11 = 0 additional pump management zone valve management P3.11 = 1 zone valve management zone valve management P3.11 = 2 additional pump management additional pump management

Page 27

P4.13

When P4.12 = 1, this parameter allows you to set the address of the BE16 board. The factory setting for this parameter is 3 and can be set within the 1 - 6 range. Note: see the instruction sheet of the BE16 accessory board for more information about the use of this parameter.

P4.14

When P4.12 = 1, this parameter allows you to set the hydraulic conguration of the main heating zone. The factory setting for this parameter is 0 and allows a direct zone to be managed, set the parameter to 1 for the management of a mixed zone. Note: see the instruction sheet of the BE16 accessory board for more information about the use of this parameter.

P4.15

This parameter allows you to specify the type of zone to be heated, it is possible to choose from the following options: 0 = HIGH TEMPERATURE (factory setting) 1 = LOW TEMPERATURE

P4.16

This parameter allows you to specify the maximum heating setpoint that can be set:

- range 20°C - 80.5°C, default 80.5°C for high temperature systems

- range 20°C - 45°C, default 45°C for low temperature systems. Note: the P4.16 value cannot be less than P4.17.

P4.17

This parameter allows you to specify the minimum heating setpoint that can be set:

- range 20°C - 80.5°C, default 40°C for high temperature systems

- range 20°C - 45°C, default 20°C for low temperature systems. Note: the P4.17 value cannot be greater than P4.16.

P4.18

This parameter allows you to activate the thermoregulation when the system has an outdoor temperature probe connected. The factory setting is 0, the boiler always operates at a xed point. With the parameter on 1 and an outdoor temperature probe connected, the boiler operates in thermoregulation. With an outdoor temperature probe disconnected the boiler always operates at a xed point. See paragraph “8.13 Setting the thermoregulation” for more details about this function.

P4.19

This parameter allows you to set the number of the compensation curve used by the boiler when in thermoregulation. The factory setting for this parameter is 2.0 for high temperature systems and 0.5 for low temperature ones. The parameter can be set with the range 1.0 - 3.0 for high temperature systems, 0.2 - 0.8 for low temperature ones. See paragraph “8.13 Setting the thermoregulation” for more details about this function.

P4.20

With this parameter you activate the “night compensation” function. The default value is 0, set to 1 to activate the function. See paragraph “8.13 Setting the thermoregulation” for more details about this function.

P4.21

Set to 1 to enable or 0 to disable (factory default setting is 0

P4.22

Set to 1 to enable or 0 to disable (factory default setting is 0

P4.23

This parameter allows you to activate the management of an additional heating zone (the use of the BE16 accessory board is required, not supplied as standard). The default value is 0, set to 1 to activate the function. Note: this parameter cannot be changed when an OTBus chronothermostat is connected.

P4.24

When P4.23 = 1, this parameter allows you to set the address of the BE16 board of zone 1. The factory setting is 1 and can be set within the 1 - 6 range. Note: see the instruction sheet of the BE16 accessory board for more information about the use of this parameter.

P4.25

When P4.12 = 1, this parameter allows you to set the hydraulic conguration of heating zone

1. The factory setting for this parameter is 0 and allows you to manage a direct zone, set to 1 to manage a mixed zone. Note: see the instruction sheet of the BE16 accessory board for more information about the use of this parameter.

P4.26

When P4.12 = 1 this parameter allows you to specify the type of zone to be heated. It is possible to choose from the following options: 0 = HIGH TEMPERATURE (factory setting) 1 = LOW TEMPERATURE

P4.27

When P4.12 = 1, this parameter allows you to the setpoint value of heating zone 1. The factory setting for this parameter is P4.28 and can be programmed within the P4.29 and P4.28 range.

P4.28

This parameter allows you to specify the maximum heating setpoint that can be set for zone 1:

- range 20°C - 80.5°C, default 80.5°C for high temperature systems

- range 20°C - 45°C, default 45°C for low temperature systems. Note: the P4.28 value cannot be less than P4.29.

P4.29

This parameter allows you to specify the minimum heating setpoint that can be set for zone 1:

- range 20°C - 80.5°C, default 40°C for high temperature systems

- range 20°C - 45°C, default 20°C for low temperature systems Note: the P4.29 value cannot be greater than P4.28.

P4.30

This parameter allows you to activate thermoregulation mode for zone 1 when the system has an outdoor temperature sensor connected. The factory setting is 0, the boiler always operates for zone 1 at a xed point; to have the boiler work in climate mode connect an outdoor temperature sensor and set the parameter to 1, connect an outdoor temperature sensor. With an outdoor temperature probe disconnected the boiler always operates at a xed point. See paragraph “8.13 Setting the thermoregulation” for more details about this function.

P4.31

This parameter allows you to set the number of the compensation curve for zone 1 used by the boiler when in climatic mode. The factory setting for this parameter is 2.0 for high temperature systems and 0.5 for low temperature ones. The parameter can be set with the range 1.0 - 3.0 for high temperature systems, 0.2 - 0.8 for low temperature ones. See paragraph “8.13 Setting the thermoregulation” for more details about this function.

P4.32

This parameter allows you to activate "night compensation" for zone 1. The default value is 0, set to 1 to activate the function. See paragraph “8.13 Setting the thermoregulation” for more details about this function.

P5 (DHW menu)

P5.11

Not available on this model

P7 (SERVICE MENU)

P7.06

This parameter is factory set to 0. Contact Vokera Technical for further advice.

P7.07

Contact Vokera Technical for further advice.

P8 (CONNECTIVITY menu)

P8.01

This parameter is used to manage the boiler remotely. Three values are available for this parameter: 0 = FACTORY SET VALUE. The boiler interface is in function, the

ModBus is enabled 1 = The boiler interface is in function, the 2 = The boiler interface isn't in function, the

via

REC10H. Only the MENU button is enable to modify P8.01 parameter.

remote control via ModBus is disabled

remote control via ModBus is enabled

P8.03

This parameter is used to enable remote boiler management using an OpenTerm device: 0 = With the OT+ function disabled, you cannot control the boiler remotely using an

OT+ device. If this parameter is set to 0, any OT+ connection is instantly interrupted, and the icon and “OTB” message on the display are switched off

1 = FACTORY-SET VALUE. With the OT+ function enabled, you can connect an OT+

device to control the boiler remotely. When you connect an OT+ device to the boiler, the icon lights up on the display and “OTB” appears.

remote control via

Page 28

5.6 FIRST COMMISSIONING

Ensure that steps 6.1 through to 6.6 have been completed before supplying the gas and electrical supply to the appliance.

 Position the system’s master switch to the “on” position.  Open the gas tap to allow fuel to ow.

 With power on the backlight comes on, then all the icons

and the segments come on for 1sec and in sequence the

rmware revision is displayed for 3sec:

 Then the interface displays the status active at that moment.

5.7 VENT CYCLE

Each time that the boiler is powered, an automatic vent cycle is carried out lasting 4 min. When the air purging cycle is in progress all heat requests are inhibited and

-AIR is displayed on the interface screen.

Heating REQUEST, the radiator icon blinks:

Bar

5.8.2 OFF

 Set the boiler to the OFF status by pressing key 1 until the

central segments are displayed.

5.8.3 ADJUSTING THE HEATING WATER TEMPERATURE WITHOUT AN OUTDOOR TEMPERATURE SENSOR CONNECTED

If there is no outdoor temperature sensor the boiler operates

at a xed point, the HEATING setpoint in this case can be

set on the main page of the screen. Pressing the key C or D displays the current heating setpoint; the value blinks with a frequency of 0.5 sec ON, 0.5 sec OFF and the icons and

come on.

The purge cycle can be interrupted early by keeping key 2 (the icon RESET comes on).

 Adjust the ambient temperature thermostat to the desired

temperature (~20°C) or, if the system is equipped with a programmable thermostat or timer, ensure that the thermostat or timer is “active” and set correctly (~20°C).

 Then set the boiler on WINTER or SUMMER depending on

the type of operation desired.

 The boiler will start up and continue working until the set

temperatures are reached, after which it will then go back to standby.

5.8 OPERATING STATUS

For changing the operating status from WINTER to OFF press key 1 until the icon for the desired function is displayed.

5.8.1 WINTER MODE

 Set the boiler to the WINTER status by pressing key 1 until

the heating icon are displayed.

RESET

The successive pressing of the key C or D allows you to set

the value of the heating setpoint within the preset range:

[40°C - 80.5°C] for high temperature systems [20°C - 45 °C] for low temperature systems with steps of 0.5°C. The level bars beside the heating icon show the setpoint value

set with respect to the operating range:

- four bars on = max setpoint

- one bar on = min setpoint

Keeping one of the two keys C or B pressed for longer, the meter increases the speed of advancement modifying the set value. If no key is pressed for 5sec, the value set is taken as the new heating setpoint and the display returns to the main page.

The interface normally displays the delivery temperature.

 When there is a heat request and the boiler is igniting, the

icon appears on the display.

5.8.4 ADJUSTING THE HEATING WATER TEMPERATURE WITH AN OUTDOOR TEMPERATURE SENSOR CONNECTED

If an outdoor temperature sensor is installed and thermoregulation is enabled (parameter P4.18 = 1), the delivery temperature is automatically selected by the system, which quickly adjusts the ambient temperature according to the variations in the outdoor temperature. If you want to change the temperature, raising it or lowering it with respect to the temperature automatically calculated by the electronic

Page 29

board, it is possible to change the HEATING setpoint as follows: press the keys C or D and select the desired level of comfort within the range (-5 - +5).

Note: if an outdoor temperature sensor is connected it is in any event possible to have the boiler operate at a xed point

by setting the parameter P4.18 = 0 (menu P4).

5.8.5 SAFETY STOP

The backlight blinks for 1min after which it switches off, while the icon continues blinking.

On the 4 digits a message scrolls containing the error code and its description.

DAY

5.8.6 RESET FUNCTION

The RESET icon comes on when there is an alarm that

requires a manual reset by the user (for example ame

lockout). To reset press key 2 RESET.

DAY

RESET

If the release attempts do not restart the boiler, contact your local Technical Assistance Centre.

Page 30

6 COMMISSIONING

NOTE

Please refer to 3 - 3E and use the appropriate PPE when carrying out any of the actions or procedures contained within this section.

6.1 GAS SUPPLY INSTALLATION

Inspect the entire installation including the gas meter, test for tightness and purge. Refer to BS 6891 (I.S. 813 in ROI) for

specic instruction.

6.2 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 ushed in accordance with the following

instructions.

6.3 INITIAL FILLING OF THE SYSTEM

Ensure both ow and return service valves are open, remove

appliance casing as described in 4.7, identify the automatic air release valve (AAV), and loosen the dust cap by turning the cap anti-clockwise one full turn. Ensure all manual air release valves located on the heating system are closed. Connect the

lling loop as shown in “Fig. 8”, slowly proceed to ll the system by rstly opening the inlet valve connected to the ow pipe, and then turning the lever on the ll valve, to the open position. As

water enters the system the pressure gauge will begin to rise. Once the gauge has reached 1 bar close both valves and begin

venting all manual air release valves, starting at the lowest rst.

It may be necessary to go back and top-up the pressure until

the entire system has been lled. Inspect the system for water

tightness, rectifying any leaks.

6.3.1 AUTO AIR VENT AAV

When the boiler has been lled for the rst time or the system has been drained and relled, it will be necessary to release

any air that may have become trapped within the appliance heat exchanger. Slacken the lower air vent valve, Connect the supplied silicone pipe to the de-aeration valve and take a bucket to collect any water that may come out after bleeding

- Open the de-aeration valve, Turn the lever on the ll valve and Wait until the water is released and then close it

AIR VENT VALV E

Fig. 21

De-aeration valve

6.4 PRE-OPERATION CHECKS

Before attempting the initial lighting of the appliance, the following checks must b

• 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

8.7) particularly continuity, polarity and resistance to earth;

• ensure the 3 AMP fuse – supplied with the appliance – has

been tted;

• ensure the system has been lled, vented and the pressure

set to 1 bar;

• ensure the ue system has been tted properly and in accordance with the instructions;

• ensure all appliance service valves are open.

e carried out:

6.5 INITIAL LIGHTING

Ensure the electrical supply to the appliance is switched on. Ensure any external controls are switched to an ‘ON’ position and are calling for heat. Pressing button 1 the appliance will now operate as described in 2.2. . Should the appliance fail to ignite,

refer to 6.5 and/or section 8 (mode of operation & fault nding).

6.6 CHECKING GAS PRESSURE AND

COMBUSTION ANALYSIS

The appliance is factory set so should require no additional adjustment once installed. However to satisfy the requirements of GSIUR 26/9 (I.S. 813 ROI), it will be necessary to gas rate the appliance using the gas meter that serves the appliance and carry out a combustion analysis check in accordance with BS 7967 (UK) to ensure that correct combustion is

occurring, see ow chart on page 49.

Additionally, if the gas valve has been adjusted, replaced, or the appliance has been converted for use with another gas type, then it becomes necessary to carry out a combustion analysis check to ensure that correct combustion is occurring. If there are no means to carry out a combustion analysis check, then it will not be possible to complete the commissioning procedure. Details on how to carry out the combustion analysis can be found in

IMPORTANT

It’s imperative that a sufcient dynamic – gas – pressure is

maintained at all times. Should the dynamic gas pressure fall below an acceptable level, the appliance may malfunction or sustain damage.

section 8

6.7 FINAL FLUSHING OF THE HEATING

SYSTEM

The system shall be ushed in accordance with BS 7593 (I.S.

813 ROI). Should a cleanser be used, it must be suitable for stainless-steel 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.

NOTE

Chemicals used to cleanse the system and/or inhibit corrosion must be pH neutral, i.e. they should ensure that the level of the pH in the system water remains neutral. Premature failure of certain components can occur if the level of pH in the system water is out-with normal levels.

Fig. 22

INITIAL FLUSHING OF THE SYSTEM

The whole of the heating system must be ushed both cold

and hot as detailed in 6.7. Open all radiator or heating valves

and the appliance ow & return service valve. Drain the boiler

and system from the lowest points. Open the drain valve full bore to remove any installation debris from the boiler prior to

lighting. Rell the boiler and heating system as described in 6.3.

6.7.1 INHIBITORS

See Section “3 GENERAL REQUIREMENTS (UK)”.

6.8 SETTING THE FLOW OUTLET TEMPERATURE

The ow outlet temperature can be adjusted between 40 °C - 80

°C for standard CH system by using the buttons C & D (Fig. 1).

6.9 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 1bar plus the equivalent height in metres (0.1 bar = 1 metre) to the highest point in the system above the base of the appliance (up to the maximum of 1.5 bar total). N.B. The safety valve is set to lift at 3 bar/30 metres/45 psig. To lower the system pressure to the required value, drain off some water from the appliance drain valve until the pressure is correct .

Page 31

6.10 REGULATING THE CENTRAL HEATING SYSTEM

Fully open all radiator and circuit valves and run the appliance for both heating and hot water until h If conditions are warm remove any thermostatic heads. Adjust radiator return valves and any branch circuit return valves until the individual return temperatures are correct and are approximately equal.

eated water is circulating.

6.11 FINAL CHECKS

• ENSURE ALL TEST NIPPLES ON THE APPLIANCE GAS

VALVE ARE TIGHT AND CHECKED FOR TIGHTNESS.

• ENSURE THE APPLIANCE FLUE SYSTEM IS FITTED

CORRECTLY AND IS PROPERLY SECURED.

• ENSURE ALL PIPE WORK IS RE-CHECKED FOR TIGHT-

NESS.

• RE-FIT APPLIANCE CASING.

• COMPLETE BENCHMARK CHECKLIST.

FOR UK ONLY

Complete details of the boiler, controls, installation and 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 will invalidate the warranty.

6.12 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 lling 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 efcient 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:

• online at: www.vokera.co.uk (UK) or www.vokera.ie (Ireland)

• for UK residents by calling: 0800 479 0754

• for ROI residents by calling: 056 7755 055

7 SERVICING INSTRUCTIONS

NOTE

Please refer to 3 - 3E and use the appropriate PPE when carrying out any of the actions or procedures contained within this section.

7.1 GENERAL

Once the appliance has been serviced, the benchmark Service Record must be completed.

For UK only: It is important that the Benchmark Service Record

is correctly completed and handed to the user. Failure to install and commission the appliance to the manufacturers instructions will invalidate the warranty.

To ensure the continued safe and efcient 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 Vokèra spare part. It should be remembered that although certain generic components may

look similar, they will be specic to an individual appliance or

product range. Use of non-genuine Vokèra 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

sufcient. It is the law that any servicing work is carried out by

competent person such as a Vokèra engineer, an approved service agent, British Gas, GAS SAFE registered personnel or other suitably qualied 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.

7.2 ROUTINE ANNUAL SERVICING

• Check the operation of the appliance and ensure it functions as described in

• Compare the performance of the appliance with its design

specication. The cause of any noticeable deterioration should be identied and rectied without delay.

• Thoroughly inspect the appliance for signs of damage or

deterioration especially the ue system and the electrical

apparatus.

• Check and adjust – if necessary – all burner pressure settings (see 8.4).

• Check and adjust – if necessary – the system design pressure (see 6.9).

• Carry out an analysis of the ue gases (see 8.4), and visually check the condition of the entire ue assembly.

• Compare the results with the appliance design specication. Any deterioration in performance must be identied and rectied without delay.

• Check that the main heat exchanger is clean and free from any debris or obstruction.

• Check and clean – if necessary – the condense trap to ensure correct operation.

The ame side of the burner is made of state-of-the-art material. Being fragile:

- be particularly careful when handling, mounting or dismantling the burner and adjacent components (e.g. electrodes, insulation panelling etc.)

- avoid direct contact with any cleaning appliance (e.g. brushes, aspirators, blowers, etc.).

This component does not need any maintenance, please do not remove it from its housing, except where the O-ring may have to be replaced. The manufacturer declines all responsibility in cases of damages due to failing to observe the above.

section 8

Page 32

7.3 CLEANING THE PRIMARY HEAT

8.6 ±1.5

6 ±1

EXCHANGER

- Refer to 7.9 and carry out the component removal procedure

- Remove the casing as indicated in the paragraph

SING REMOVAL (“Fig. 25”)”

- Disconnect the connecting cables of the electrodes.

- Disconnect the power cables of the fan.

- Remove the combustion unit as described in “7.22 combustion unit”

- Take out the air/gas conveyor assembly including the fan and mixer, being careful not to damage the insulating panel and the electrodes.

- Remove the siphon connecting pipe from the condensate drain

tting of the heat exchanger and connect a temporary collecting

pipe. At this point proceed with the heat exchanger cleaning operations.

- Vacuum out any dirt residues inside the heat exchanger, being careful NOT to damage the retarder in

- Clean the coils of the heat exchanger with a soft bristled brush.

DO NOT USE METAL BRUSHES THAT COULD DAMAGE THE COMPONENTS.

- Clean the spaces between the coils using 0.4 mm thick blade, also available in a kit.

- Vacuum away any residues produced by the cleaning

- Rinse with water, being careful NOT to damage the retarder insulating panel

- Make sure the retarder insulation panel is undamaged and

replace it if necessary following the relative procedure.

- Once

the cleaning operations are nished, carefully reassemble all the components, following the above instructions in the reverse order.

- To close the xing nuts of the air/gas conveyor assembly, use a tightening torque of 8 Nm.

- Turn the power and gas feeding to the boiler back on.

If there are obstinate combustion products on the surface of the heat exchanger, clean by spraying natural white vinegar, being careful NOT to damage the retarder insulating panel.

- Leave it to work for a few minutes

- Clean the coils of the heat exchanger with a soft bristled brush.

DO NOT USE METAL BRUSHES THAT COULD DAMAGE THE COMPONENTS.

- Rinse with water, being careful NOT to damage the retarder insulating panel

- Turn the power and gas feeding to the boiler back on.

sulating panel.

“7.10 CA-

7.4 CLEANING THE BURNER

Refer to 7.9 and carry out the component removal procedure

- Remove the casing as indicated in the paragraph

SING REMOVAL (“Fig. 25”)”

- Disconnect the connecting cables of the electrodes.

- Disconnect the power cables of the fan.

- Remove the combustion unit as described in “7.22 combustion unit”

- Take out the air/g mixer, being careful not to damage the ceramic panel and the electrodes. At this point proceed with the burner cleaning operations.

- Clean the burner with a soft bristled brush, being careful not to damage the insulating panel and the electrodes.

- DO NOT USE METAL BRUSHES THAT COULD DAMAGE THE COMPONENTS.

- Check that the burner insulating panel and the sealing gasket are undamaged and replace them if necessary, following the relative procedure.

- Once the cleaning operations are nished, carefully reassemble all the components, following the above instructions in the reverse order.

- To close the xing nuts of the air/gas tightening torque of 8 Nm.

- Turn the power and gas feeding to the boiler back on.

7.5 CLEANING THE SIPHON

Remove the syphon as indicated in the section “Removing the siphon”.

- Clean the siphon, it can be washed with detergent water.

- Wash the SRD device making water circulate from the discharge attachment. Never use metal or pointed tools to remove

as conveyor assembly including the fan and

conveyor assembly, use a

“7.10 CA-

deposits or residues inside the device, which could damage it.

- After the cleaning operations, reassemble the siphon and the

SRD device, taking care to t the components with due care.

Having cleaned the siphon and the SRD device, the siphon

must be lled with water before starting the boiler again.

At the end of the maintenance operations on the siphon and the SRD device we recommend run the boiler in condensate regime for a few minutes and check there are no leaks from the entire condensate evacuation line.

7.6 ELECTRODES VERIFICATION

The electrodes play an important role in the boiler ignition phase; in this regard, if they are replaced, they must always be positio-

ned correctly and the reference position indicated in the gure

must be complied with.

ame ignition

electrode

detector electrode/

ionisation sensor

Fig. 23

Do not sandpaper the electrodes.

During the annual maintenance, check the state of wear of the electrodes and replace them if have badly deteriorated.

The removal and eventual replacement of the electrodes involves also the replacement of the sealing gaskets.

7.7 CLAPET

Refer to 7.9 and carry out the component removal procedure. The boiler has a check valve.(clapet)

To access the check valve:

- remove the fan by unscrewing the 4 screws (D) xing it to the conveyor

- make sure there are no foreign material deposits on the membrane of the check valve and if any remove them and checking for damage

- check the valve opens and closes correctly

- re-assemble the components in reverse order, making sure the check valve is put back in the correct direction.

When there is maintenance work on the check valve make sure that it is positioned correctly to ensure the system operates correctly and safely.

Fig. 24

Page 33

7.8 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 nding section

will assist in determining which component is malfunctioning.

7.9 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 CASING REMOVAL” 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 complete commissioning check as detailed in section

COMMISSIONING”

TEST FOR GAS TIGHTNESS IF ANY GAS CARRYING COMPONENTS HAVE BEEN REMOVED OR DISTURBED.

, after replacing any component. ALWAYS

“6

7.10 CASING REMOVAL (“FIG. 25”)

To remove the casing locate and unscrew the 2-screws (A) that secure the outer casing to the appliance, lift the casing

upward to disengage it from the top locating hooks and then remove.

7.11 PUMP ASSEMBLY (“FIG. 26”)

Carry out component removal procedure as described in 7.9. Disconnect and remove the pump outlet pipe (A) from the pump assembly/combustion chamber connection. Remove the expansion pipe locking pin (B) from the top of the

pump assembly and withdraw the exible pipe.. Disconnect the

electrical wiring from the pump’s electrical connection point (D). Locate and remove the 2 securing screws (E) at the rear of the pump assembly. 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.

Fig. 25

Fig. 26

7.12 SAFETY VALVE (“FIG. 27”)

Carry out component removal procedure as described in 7.9. Disconnect the outlet pipe (G) from the safety valve, remove safety valve locking pin (H) from the hydraulic manifold. Replace in the reverse order.

7.13 LOWER ATOMATIC AIR RELEASE VALVE (“FIG. 26”)

Carry out component removal procedure as described in 7.9. Remove the expansion pipe locking pin (B) from the pump assembly and remove the expansion pipe. Locate and remove the AAV locking pin (I) from the pump assembly and remove the AAV assembly (J). Replace in the reverse order.

7.14 WATER PRESSURE TRANSDUCER

Carry out component removal procedure as described in 7.9. Locate and remove the locking pin (M) from the water pressure transducer (N). Remove the wiring. Carefully withdraw the transducer. Replace in the reverse order.

7.15 FLOW THERMISTOR

Carry out component removal procedure as described in 7.9.

Unclip and remove the air chamber front cover. Unclip the ow thermistor from the ow outlet pipe. Disconnect thermistor

electrical plug. Replace in the reverse order.

7.16 RETURN THERMISTOR

Carry out component removal procedure as described in 7.9. Unclip the return thermistor from the return inlet pipe. Disconnect thermistor electrical plug. Replace in the reverse order.

(FIG. 3 - POS. 7)

(FIG. 3 - POS. 21)

7.17 PRINTED CIRCUIT BOARD

Carry out component removal procedure as described in 7.9. Pull the control fascia forward and lower it. Push the clips (O) which secure the PCB cover, remove cover, after carefully tak-

ing note of all wiring connections and jumper tag conguration.

Unhook and remove connection block (P). Disconnect all wiring from the PCB, locate and remove the PCB securing screws, remove the required PCB. Replace in the reverse order ensuring that the position of the 2 control knobs are correctly aligned with the respective potentiometers on the PCB. Ensure that the correct jumper tag conguration has been respected. It will be necessary to check the functioning of the PCB

is set for the correct boiler type/application. Also refer to 7.23.

(FIG. 28)

(FIG. 29)

Fig. 27

Fig. 28

Fig. 29

Page 34

7.18 GAS VALVE

Carry out component removal procedure as described in 7.9. 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 (Q) must be discarded and replaced with new sealing washers. Disconnect the compensation pipe (R). Unscrew gas pipe connections (S-T), the gas valve can now be removed. Replace in the reverse order. Check and adjust burner pressure settings.

WARNING, A GAS TIGHTNESS CHECK MUST BE CARRIED OUT.

7.18.1 INJECTOR (FIG. 30)

Carry out component removal procedure as described in 7.9. Unscrew and remove gas pipe connections (S-T). Locate and remove the injector (U) inside the valve. Replace in the reverse order. Check and adjust burner pressure settings.

WARNING, A GAS TIGHTNESS CHECK MUST BE CARRIED OUT.

7.19 ELECTRODES

Carry out component removal procedure as described in 7.9. Remove the air chamber front cover. Disconnect the electrode leads and ancillary wiring from their respective connectors. Remove the retaining screws (V) for electrode. Remove the spark ignition electrode (W). Remove the ame sensor electrod (Y).

(FIG. 30)

(FIG. 31)

7.20 EXPANSION VESSEL (FIG. 32)

Carry out component removal procedure as described in 7.9. Disconnect the exible expansion pipe from the vessel. Unscrew the nut that secures the vessel to the lower frame. Locate and remove the screw (Z) that secures the vessel to the top. Disconnect the connection pipe (Z1). 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.

7.21 HEAT EXCHANGER (FIG. 33)

Refer to 7.9 and carry out the component removal procedure.

Loosen the nuts on the 2 ramps (A and B).

- Remove the clips (C) to remove the 2 ramps (A and B).

- Remove the 2 ramps (A and B) from the exchanger.

- Remove the condensate drain pipe (D).

- Withdraw the rain protection drain pipe (H).

- Disconnect the ue gas probe connector.

- Remove the screw (F) of the ue gas analysis socket and

remove the cap.

- Remove the screw (G) that xes the rain cover.

- Unscrew the 4 screws (E) that secure the exchanger to the seat

- Remove the exchanger.

Once all the operations have been completed, reassemble all the components operating in the opposite direction to that described. Pay particular attention to the insertion of ramps A and B, use tongs at the base of the signposting to avoid the overshoot at the inlet of the exchanger connections Restore voltage and gas supply to the boiler.

7.21.1 REMOVING THE RETARDER INSULATION PANEL

Removing the retarder insulation panel

- Carry out the component removal procedure as described

in the chapter “7.22 combustion unit”

- Protect the lower part of the internal coils of the exchanger

to prevent dust and parts of the insulating panel from falling

into them during subsequent operations. THE CHARACTERISTICS OF THE MATERIAL MAKE THE INDIVIDUAL PROTECTION DEVICES NOT NECESSARY BUT, FOR SAFETY, WE RECOMMEND THE USE OF A MASK, GLOVES AND PROTECTIVE GLASSES.

- With the aid of a blade, cut the insulating panel to be replaced

approximately 60 mm from the circumference.

- Lift and remove the 2 pieces of panel from the seat.

- The panel is xed with a clip; if, during the removal opera-

tions, the clip should remain xed to the relative pin, remove

it by unscrewing it or, if damaged, with the aid of a pliers.

- Vacuum any residual material present on the exchanger

coils and retarder support.

- Position the new retarder insulation panel near the seat and

insert it fully by pressing on the central part.

- Once all the operations have been completed, reassemble

all the components operating in the opposite direction to that

described.

- Restore voltage and gas supply to the boiler

Fig. 30

Fig. 31

Fig. 32

tongs

position

Fig. 33

tongs

position

Page 35

7.21.2 TRANSFORMER

Carry out component removal procedure as described in 7.9.

Unscrew the screw that xs the transformer and remove it.

7.22 COMBUSTION UNIT

Refer to 7.9 and carry out the component removal procedure.

- Remove the casing as indicated in paragraph “7.10 CASING REMOVAL (“Fig. 25”)”

- Disconnect the electrode connection cables.

- Disconnect the fan power cables.

- Remove the mixer clip (A).

- Loosen the gas ramp nut (B).

- Remove and rotate the gas train.

Remove the 4 nuts (C) together with the gasket (E) and extract the air / gas conveyor assembly including fan and mixer taking care not to damage the insulating panel and the electrodes. Check the integrity of the burner insulation panel and the sealing gasket and replace it if necessary, following the appropriate procedure.

Fig. 34

7.23 FAN AND MIXER

Refer to 7.9 and carry out the component removal procedure. Completely unscrew the 2 screws (B) and loosen the 2 screws (C) to extract the fan. Unscrew the 3 screws (A) that x the mixer to the fan and remove it. To disassemble the non-return valve (clapet - D) completely unscrew the 2 screws (C). Once all the operations have been completed, reassemble all the components operating in the opposite direction to that described.

Restore voltage and gas supply to the boile

7.24 REMOVING THE SIPHON FIG. 37)

Refer to 7.9 and carry out the component removal procedure.

- Take out the condensate collection pipe

- Unscrew the SRD device

- Unscrew the screw (A) and remove the plate (B)

- Take out the inside part (C) of the siphon .

Once the operations are nished, put back the components in

the reverse order to that described, checking the gasket and sealing OR are correctly positioned.

7.25 REPLACING INTERFACE

Refer to 7.9 and carry out the component removal procedure. Remove the appliance PCB as detailed in 7.12. Locate and remove the securing screws that hold the interface to the control panel, and gently lift the interface away from the panel. Disconnect the 4-wire plug from the interface, noting it’s position. Replace in the reverse order, ensuring that the interface is correctly located and engaged with the corresponding interface buttons (also refer to 7.23).

7.26 REPLACING PCB OR INTERFACE

hen either the PCB or interface has been replaced, it may be

necessary to re-programme the parameters of the appliance to suit the personalised settings, e.g. enable clock, appliance, type, etc. Check that the following parameters are matched to suit the needs of the specific installation/application. P3.01 P3.02 P3.03 P3.06 P3.07 P3.08 P3.09 P3.10

Fig. 35

Fig. 36

Fig. 37

Page 36

8 CHECKS, ADJUSTMENTS AND FAULT FINDING

OTE

Please refer to 3 - 3E and use the appropriate PPE when carrying out any of the actions or procedures contained within this section.

8.1 CHECKING APPLIANCE OPERATION

When carrying out any repairs or servicing to the appliance, the relevant commissioning procedure must be undertaken to ensure the continued safe operation of the appliance. Particular attention should be made to ensure gas tightness, water tightness and the electrical integrity of the appliance.

8.2 APPLIANCE MODES OF OPERATION

NOTE

There must be sufcient system water pressure (min. 0.5 bar)

to ensure the water pressure switch is activated. If there is in-

sufcient system pressure the pump and fan will be prevented

from operating and the low-pressure fault code will be indicated.

8.2.1 MODE SELECTION IN THE OFF/RESET POSITION

When the mode selection is in the OFF/RESET position, the following functions are active.

Active functions:

• frost-protection system

• pump anti-block.

8.2.2 ON-BOARD FUNCTIONS

• CO FUNCTION: the CO function when activated, will allow the appliance to run at CH maximum, whilst a combustion analysis check or a mechanical gas valve calibration is being carried out. Whilst the CO function is active, all other functions are disabled (minimum power operating period, anti-cycle, set-point, etc). Once enabled, the CO function will remain active for a 15-minute period, or until the function is manually deactivated

• FROST-PROTECTION: this function is only active when there are no requests for heating or HW. If the temperature drops below 5°C, the boiler will operate on minimum power until the temperature of the thermistors reaches 35°C. Thereafter the pump & fan will over-run for 30-seconds.

• ANTI-CYCLE FUNCTION: the anti-cycle function ensures the burner remains switched off for at least 3-minutes after the set-point hysterisis (set-point + 5-deg) for CH heat request.

• PUMP ANTI-BLOCK FUNCTION: when there has been no heating or HW request for 24-hours, the anti-block cycle is activated. The pump will be activated for a period of 30-seconds.

8.3 HEATING MODE

With the mode selection in the heating & hot water position and any additional controls (time clock, programmer, room thermostat, etc.) calling for heat, the appliance will operate in the heating mode. The pump and fan will be activated via the

ow temperature sensor. When the fan is sensed to be operating

correctly (tacho signal), the ignition sequence commences. Igni-

tion is sensed by the electronic circuit to ensure ame stability

at the burner. Once successful ignition has been achieved, the electronic circuitry increases the gas rate to 75% for a period of 15 minutes. The speed of the fan and therefore the output of the boiler is

determined by the temperature of the water sensed by the ow temperature sensor, consequently a high temperature at the ow

sensor results in a lower fan speed. As the water temperature

increases, the temperature sensors – located on the ow 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 (+ hysterisis), the burner will switch off. The built-in anti-cycle device prevents the burner from re-lighting for approximately 3-minutes. When

the temperature of the ow sensor falls below the set point (-

hysterisis), 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 5°C (hysterisis), the burner will shut down. A new ignition sequence will be enabled when the 3- minute anti-cycle has been performed and the temperature at the primary thermistor has dropped 5°C (hysterisis) below the set-point.

8.4 CHECKING THE CO2 AND ADJUSTING THE GAS VALVE

THE GAS VALVE MUST BE SET-UP OR ADJUSTED WITH THE AID OF A PROPERLY CALIBRATED FLUE GAS ANALYSER. Isolate the appliance from the electrical supply and remove the appliance casing as described in 4.7.

Set the ue gas analyser to read CO2 and insert the probe into the ue analysis test point.

8.4.1 COMBUSTION CHECK

To carry out the combustion analysis, proceed as follows:

 set the boiler to the OFF status by pressing button 1

 Remove the screw and the cover on the air distribution box

(A-B).

 Insert the analysis probe adapter (D) located in the

documentation envelope, into the hole for the combustion analysis.

 Insert the ue gases analysis pro

be into the adaptor.

Fig. 38

Page 37

 activate the combustion control function by pressing

buttons 2+3 for at least 2sec

RESET

2 3

Fig. 39

 the display shows the scrolling text CO and the icons ,

, and come on:

screw

 replace and store the analysis probe adapter supplied with

the boiler, in the documentation envelope

 set the boiler in the desired operating mode according to

the season

 adjust the required temperature values according to custo-

mer requirements.

When the combustion analysis is in progress all heat requests are inhibited and a message is shown on the display.

IMPORTANT

The combustion analysis function is active for a maximum time of 15 minutes; the burner shuts down if an outlet temperature of 95° C is reached. It will ignite again when the temperature falls below 75° C.

With OTBus device connected it is not possible to

activate the combustion control function. To perform ue

gas analysis, disconnect the OTBus connection wires and wait 4 minutes, or disconnect the power supply and re-power the boiler.

The combustion analysis function is normally performed with the three-way valve positioned in heating mode.

 using the , keys it is possible to change the fan

speed

 set the max value (rpm) and conrm the choise with .

The display shows for 10 sec. the number of revs set, together with the rpm icon.

 The boiler will function at max power.  Check on the analyser that the max CO2 complies with

what indicated in the table, if data are different proceed with the calibration of the gas valve - see paragraph ““8.11 Gas valve calibration””

CO2 max

20 S 9,1 10,0 %

25 S 9,0 10,0 %

30 S 9,1 10,0 %

NATURAL GAS

(G20)

LPG

(G31)

 Set the min value (rpm) and conrm the choise with .

8.5 CHECKING THE EXPANSION VESSEL

Carry out the component removal procedure as described in

7.9. 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 6).

8.6 EXTERNAL FAULTS

Before carrying out any faultnding or component replacement,

ensure the fault is not attributable to any aspect of the installation.

8.6.1 INSTALLATION FAULTS

Symptom Possible cause

No ignition Check wiring/check electrical

supply No hot water Check external controls No heating Check external controls

Fault Possible cause Fault code Check gas supply, check ue

system, check polarity

 The display shows for 10 sec. the number of revs set,

together with the rpm icon.  The boiler will function at min power.  Check on the analyser that the min CO2 complies with

what indicated in the table, if data are different proceed

with the calibration of the gas valve - see paragraph ““8.11

Gas valve calibration””

CO2 min

20 S 9,0 10,0 %

25 S 9,0 10,0 %

30 S 9,0 10,0 %

NATURAL GAS

(G20)

LPG

(G31)

 by pressing button it is possible to stop function in

advance

When the checks are completed:

 exit the function by pressing the button  remove the analyzer probe and close the combustion

analysis sockets with the appropriate plugs and relative

Page 38

8.7 ELECTRICAL CHECKS

Any electrical checks must be carried out by a suitably quali-

ed person.

8.7.1 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.

8.7.2 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. Repeat above test on the Live & Earth connections at the appliance terminal strip.

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.

8.7.3 POLARITY CHECK

With the appliance connected to the electrical supply and using a suitable m

•

connect test leads between the Live & Neutral connections at the appliance terminal strip. The meter should read approximately 230V ac. If so proceed to next stage. If not, see 8.7.4.

• connect test leads between the Live & Earth connections at the appliance terminal strip. The meter should read approximately 230V ac. If so proceed to next stage. If not, see 8.7.4.

• connect test leads between the Neutral & Earth connections at the appliance terminal strip. The meter should read approximately 0 – 15Vac. If so polarity is

8.7.4 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.

ultimeter, carry out the following voltage tests:

correct. If not, see

8.7.4

8.9 COMPONENT VALUES & CHARACTERISTICS

COMPONENT VALUE

Fan 230Vac Pump 230Vac Ignition transformer 230Vac Gas valve 230Vac Room thermostat connection 24Vdc NTC thermistor (dry contact) 10Kohm NTC thermistor (wet contact) 10Kohm

FUNCTION VALUE

Standard Heating temperature range (min – max °C)

40 - 80

75% maximum CH time 15 min Heating OFF hysterisis (°C) SP + 5 Heating ON hysterisis (°C) SP – 5 Anti-cycle delay 3-min Pump over-run 30-sec Low output (min. output + %) Min+25 CO function max temp. (°C) 90 CO re-light temp. (°C) 78 CO function time 15-min Flow NTC max temp. (°C) 90 High limit thermostat (°C) 105 Flue NTC max temp. (°C) 125 Maximum differential (°C) 35

IGNITION CONTROL VALUE

Ignition attempts before L/O (lockout) 5

Re-ignition attempts after loss of ame

signal

APPLIANCE STATUS AND FAULT CODES

When the boiler detects a temporary fault condition, the appro-

priate code is shown. If/when the fault is nal a fault code will

be displayed. See ““8.14 Lights and faults””.

8.10 ADJUSTMENTS

The boiler has already been adjusted by the manufacturer, if, however, adjustments have to be made again, for example

after extraordinary maintenance, after the gas valve has been replaced or after a gas conversion from natural gas to LPG, or vice versa, follow the procedures described in following.

8.7.5 RESISTANCE TO EARTH CHECK

Isolate the appliance from the electrical supply, and using a suitable multi-meter carry out a resistance test. Connect test leads between the Live & Earth connections at the appliance

terminal strip. If the meter reads other than innity 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 faultnding 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.

8.8 FAULT FINDING

Before attempting any fault nding, the electrical checks as

detailed in 8.7 must be carried out. Isolate the appliance from the electrical supply.

Disconnect any external controls from terminal plug (CN5 g.

41), and insert a link-wire between the two wires at the ‘TA’ connections.

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 8. Should the boiler fail to respond, the internal fuses and connectors should be checked to ensure integrity and continuity.

The maximum and minimum power settings, maximum heating and slow ignition must be performed strictly in the se-

quence indicated and only by qualied personnel:

 power the boiler  carry out the access procedure to the parameters as indica-

ted in paragraph ““5.1 Access to the parameters””

 select menu P3 and confirm the selection with  display the desired parameter using the arrows - see table -

P3.06 min fan speed

P3.07 max fan speed

P3.08 soft ignition

P3.09 max CH fan speed

 then enter the sub-menu by pressing  set the desired values with and , referring to the

following tables

table 1

MAX CH RPM FAN

SPEED

20 S 6.200 6.000 rpm

25 S 5.800 5.700 rpm

30 S 6.900 6.800 rpm

NATURAL GAS

(G20)

LPG

(G31)

Page 39

table 2

800

1200

1600

2000

2400

2800

3200

3600

4000

4400

4800

5200

5600

6000

6400

6800

7200

7600

8000

2 4 6 8 10 12 14 16 18 20 22 24 26 28 30

7600

8400

MIN CH RPM FAN

SPEED

NATURAL GAS

(G20)

LPG

(G31)

20 S 1.600 2.000 rpm

25 S 1.700 2.000 rpm

30 S 1.700 2.000 rpm

table 3

SOFT IGNITION

20 S - 25 S - 30 S

NATURAL GAS

(G20)

5.500 5.500 rpm

LPG

(G31)

The boiler is delivered with the adjustments shown in the technical data table. Depending on plant engineering requirements or regional

ue gas emission limits it is, however, possible to modify this

value, referring to the following graphs.

HTG curve -

VISION PLUS

20S

 confirm values with

Enter

8.11 GAS VALVE CALIBRATION

Perform the CO2 verification procedure as indicated in paragraph “8.4.1 Combustion check”, if it is necessary to modify

the values, proceed as follows:

 turn clockwise on the maximum power adjustment screw to

decrease the value

 turn the minimum power adjustment screw clockwise to in-

crease the value.

CO2 +

Min power

adjustment screw

Fig. 40

8.12 RANGE RATED

This boiler can be adapted to the heating requirements of the system, in fact it is possible to set the maximum delivery for

heating operation of the boiler itself:

 power up the boiler  access the technical parameters menu, as indicated in the

paragraph “  select the P3 menu and conrm the selection with  the display shows P3.10, enter the sub-menu by pressing

 set the maximum desired heating value (rpm) with the

and keys, conrming the selection with

 Once the required output has been set (maximum heating),

put the value on the self-adhesive label on the back cover

of this manual. For subsequent controls and adjustments,

refer to the set value.

The calibration does not entail the ignition of the boiler.

“5.1 Access to the parameters””

CO2 -

Max power

adjustment screw

fan rotations (r.p.m.)

heat output (kW)

HTG curve -

7200

6800

6400

6000

5600

5200

4800

4400

4000

3600

3200

2800

2400

2000

fan rotations (r.p.m.)

1600

1200

800

2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32

VISION PLUS

25 S

heat output (kW)

HTG curve -

8000

7600

7200

6800

6400

6000

5600

5200

4800

4400

4000

3600

3200

fan rotations (r.p.m.)

2800

2400

2000

1600

1200

800

2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38

VISION PLUS

30 S

heat output (kW)

8.13 SETTING THE THERMOREGULATION

Enabling THERMOREGULATION occurs in the following way:

 access the technical parameters menu, as indicated in the

paragraph “

 select the menu P4 and then P4.18 = 1.

“5.1 Access to the parameters””

Page 40

Thermoregulation only works with the outdoor temperature

3,0

100

15 10 50-5 -10-15 -20

2,52,0

1,5

T80

1,0

0,8 0,6 0,4

0,2

T45

CURVE DI TERMOREGOLAZIONE

25 20 15

10 50-5 -10-15 -20

CORREZIONE CURVA CLIMATICA

20 15 10 50-5 -10-15 -20

RIDUZIONE NOTTURNA PARALLELA

sensor connected and active only for the HEATING function. If P4.18 = 0 or outdoor temperature probe disconnected the

boiler operates at a xed point. The temperature measured by

the outdoor temperature sensor is displayed in “8.12 Range rated” under I0.09. The thermoregulation algorithm will not directly use the outdoor temperature, but rather a calculated outdoor temperature that takes into account the building’s

insulation: in buildings that are well insulated, the outdoor

temperature variations will have less impact than those that are poorly insulated by comparison.

REQUEST FROM OT CHRONOTHERMOSTAT

In this case the delivery setpoint is calculated by the chronothermostat according to the outdoor temperature value and the difference between the ambient temperature and the desired ambient temperature.

REQUEST FROM ROOM THERMOSTAT

In this case the delivery setpoint is calculated by the adjustment board according to the outdoor temperature value so as to obtain an estimated outdoor temperature of 20° (reference ambient temperature). There are 2 parameters that compete to calculate the output

setpoint:

 slope of the compensation curve (KT)  offset on the reference ambient temperature.

OFFSET ON THE REFERENCE AMBIENT TEMPERATURE

The user can, in any event, indirectly intervene on the value of the HEATING setpoint setting, with reference to the reference temperature (20°C), an offset within the range -5 - +5 (offset 0 = 20°C). For correcting the offset see the paragraph ““5.8.4 Adjusting the heating water temperature with an outdoor temperature sensor connected””.

CLIMATE CURVE CORRECTION

+5°C

DELIVERY TEMPERATURE (°C)

0°C

-5°C

EXTERNAL TEMPERATURE (°C)

SELECTING THE THERMOREGULATION CURVE (PARAMETER P4.19)

The thermoregulation curve for heating maintains a theoretical temperature of 20°C indoors, when the outdoor temperature is between +20°C and -20°C. The choice of the curve depends on the minimum outdoor temperature envisaged (and therefore on the geographical location), and on the delivery temperature envisaged (and therefore on the type of system). It is carefully calculated by the installer on the basis of the

following formula:

KT = T. outlet envisaged - Tshift 20- min. design external T

Tshift = 30°C standard system

25°C oor installations

If the calculation produces an intermediate value between two curves, you are advised to choose the thermoregulation curve nearest the value obtained.

Example:

if the value obtained from the calculation is 1.3, this is between curve 1 and curve 1.5. Choose the nearest curve, i.e. 1.5.

The settable KT values are as follows:

 standard system: 1.0-3.0  oor system 0.2-0.8.

Through the interface it is possible to access the menu P4 and the parameter P4.19 to set the pre-selected thermoregulation

curve:

 access the technical parameters menu, as indicated in the

paragraph “

“5.1 Access to the parameters””

 select the menu P4 and then P4.19  press the key to conrm  set the desired climatic curve with the and arrow

keys

 conrm with

THERMOREGULATION CURVES

DELIVERY TEMPERATURE (°C)

T80 Maximum temperature heating setpoint for std systems

T45 Maximum temperature heating setpoint for oor systems

EXTERNAL TEMPERATURE (°C)

NIGHT COMPENSATION (PARAMETER P4.20)

If a ROOM THERMOSTAT is connected to a programming timer, from the menu P4 parameter P4.20 the night compensation can be enabled.

To set the night compensation:

 access the technical parameters menu, as indicated in the

paragraph “

“5.1 Access to the parameters””

 select the menu P4 and then P4.20  press the key to conrm  set the parameter to 1  conrm with

In this case, when the CONTACT is CLOSED, the heat

request is made by the ow sensor, on the basis of the outdoor

temperature, to obtain a nominal ambient temperature on DAY level (20°C). The opening of the contact does not produce a switch-off, but a reduction (parallel translation) of the climatic curve on NIGHT level (16°C). Also in this case, the user can indirectly modify the value of the HEATING setpoint inserting once again an offset on the reference DAY temperature (20°C) rather than NIGHT (16°C) that can vary within the range [-5 - +5]. For correcting the offset see the paragraph “5.8.4 Adjusting the heating water temperature with an outdoor temperature sensor connected”.

DELIVERY TEMPERATURE (°C)

PARALLEL NIGHT TIME REDUCTION

DAY TEMPERATURE

Curva climatica GIORNO

CURVE

NIGHT TEMPERATURE

Curva climatica NOTTE

CURVE

EXTERNAL TEMPERATURE (°C)

8.14 LIGHTS AND FAULTS

Page 41

When there is a fault the icon blinks with a frequency of

0.5sec ON and 0.5sec OFF, the backlight blinks for 1min with a frequency of 1sec ON and 1sec OFF after which it switches

off; while the bell continues to ash.

On the 4 digits of the display a scrolling message that describes the error code is shown.

DAY

When a fault occurs the following icons can appear:

- it comes on when there is a ame alarm (E010)

- RESET comes on when there is an alarm that requires the

manual reset by the user (ame lockout for example)

- comes on together with the icon , except for ame and water alarms.

RESET FUNCTION

In order to reset the boiler’s operation in the event of a fault, it is necessary to press the RESET button. At this point, if the correct operating conditions have been restored, the boiler will restart automatically. There are a maximum of 3 consecutive attempts.

 select the P3 menu and then P3.12 with the keys and

 set the parameter to 1 conrming the selection with

NOTE: The meter resetting procedure should be carried out

after each in-depth cleaning of the primary exchanger or if this latter is replaced.

The total hours can be veried in the follow

ing way:

 access the INFO menus as indicated in the paragraph

““8.12 Range rated”” at I0.15 to display the value of the ue

gases probe meter.

DAY

If the reset attempts do not activate the boiler, contact

DAY

your installer or Vokera Ltd.

FOR FAULT E041

If the pressure drops below the safety threshold of 0.3 bar the boiler displays the fault code E041 for a transitional time of 30sec.

DAY

When the transitional time has nished, if the fault persists the

fault code E040 is displayed.

When the boiler has fault E040 manual loading should be car

ried out following procedure indicated in section ““4.2a WHAT IF I HAVE FREQUENTLY TO TOP-UP THE SYSTEM””. If the drop in pressure is very frequent, contact your installer or Vokera Ltd.

FOR FAULT E091

The boiler has an auto-diagnostic system which, based on the total number of hours in certain operating conditions, can signal the need to clean the primary exchanger (alarm code E091). Once the cleaning operation (made with special kit supplied as an accessory) it is necessary to reset to zero the total hour

meter following procedure indicated below:

 access the technical parameters as explained in the section

“

“5.1 Access to the parameters””

Page 42

8.15 BOILER FAULT CODES

ERROR

CODE

E010

E011 extraneous ame transitional E020 limit thermostat denitive E030 fan fault denitive E040 pressure transducer – load system denitive E041 water transducer – load system transitional E042 wqater transducer fault denitive E060 Conguration fault (see P3.01) transitional

E070

E077 water thermostat main zone or zone 1 (when enabled) transitional

E080

E084 delivery line probe fault - zone 1 transitional E086 delivery line probe fault - main zone transitional

E090

E091 clean primary heat exchanger transitional E099 reset attempts exhausted, boiler blocked denitive, not resettable

<0,6 bar >3,0 bar

COM lost communication with boiler board transitional

COMP lost communication with main zone transitional COM1 lost communication with zone 1 transitional FWER FW version not compatible denitive OBCD damaged clock signalisation OTER OTBus conguration fault

For reset faults, except for E40-E041, call engineer

condensate discharge blockage

fumes discharge alarm/air intake obstructed

ow sensor overtemperature

ow/return sensor differential alarm

return line probe overtemperature

outlet/return line probe differential alarm

ue gas probe overtemperature

Low water pressure check the HTG system

High water pressure check the HTG system

FAULT

ame lockout/

ow sensor fault

return line probe fault

ue gas probe fault

DESCRIPTION OF ALARM

TYPE

denitive

transitional

denitive denitive

transitional

denitive denitive

transitional

denitive

8.16 INFO MENU

Pressing the key allows the selected parameter to be displayed; pressing the key returns you to the main screen:

Parameter

name

I0.11

Scrolling message

only if parameter P1.05 = 1

DHW FLOW RATE not available DHW SETPOINT not available

Description

Page 43

8.17 EMBEDDED CLOCK

The appliance incorporates an embedded clock that can be enabled and used to insert ON/OFF time periods for boiler operation; and this can be used in series with additional external controls if necessary. NOTES

• It is necessary to insert the correct day and time before enabling/setting the embedded clock

• It is necessary enter parameter P4.21 in order to enable or disable the embedded clock (factory default is disabled).

• It is necessary to enter parameter P4.22 in order to enable or disable mode selection (factory default is disabled).

• Use pass-code ‘18’ in order to access the above parameters

Time ON is displayed again, then the programming of the time bands is resumed up to the maximum of the programmable bands (four), or else and you move on to the programming of the next day. For each day of the week it is possible to program up to a maximum of 4 bads, each characterized by a start time and an end time. Outside these time bands, heat requests from the room thermostat are ignored..

The central heating time bands enabled by default are: 07:30 ÷ 08:30/12:00 ÷ 13:30/18:00 ÷ 22:30 from MON to FRI 08:00 ÷ 22:30 from SAT to SUN.

is pressed to conrm the bands set

8.18 CLOCK FUNCTIONALITY

The embedded clock has the following functionality:

• Up to 4 different ON/OFF periods (time bands) can be programmed independently for each day

• Weekdays (Mon-Fri) can be grouped

• Weekend (Sat & Sun) can be grouped

• Manual OFF (heating programme is suspended and boiler operates only for hot water

• Manual ON (heating programme is suspended and boiler operates continuously for heating)*

• AUTO (boiler operates heating according to the set schedule)*

*a room thermostat – if tted – will over-ride the operation of

the heating

8.19 PROGRAMMING THE EMBEDDED

CLOCK

To access the programming timing menu press the keys B+D for at least 2 sec.

When heating programming time is enabled, pressing the C + D keys allows you to switch from AUTO time programming to

MAN ON or MAN OFF.

RESET

The display appears as in the following gure:

Using the , arrows select the day or the pre-selected

group of days:

1-2-3-4-5-6-7 programming of the individual days 1-5 programming from Monday to Friday

6-7 programming from Saturday to Sunday 1-7 programming the whole week

With the key you conrm the selection made and you pass to the programming of the time bands.

With the

and you conrm the changes made

With the key you exit without saving the selections.

key you exit the programming timing menu

Setting the time bands

The display shows TIME ON, press to set the ignition time, with , change the time and conrm with . The display shows TIME OFF, press to set the switching OFF time, with , change the time and conrm with .

Page 44

9 WIRING DIAGRAMS

NOTE

Please refer to 3 - 3E and use the appropriate PPE when carrying out any of the actions or procedures contained within this section.

9.1 EXTERNAL WIRING

TExternal controls must to be added to the system and they must be connected to the appliance as shown in the following diagrams. For advice on controls that are not featured in this book, please contact Vokera technical on 0844 3910999

8.2 TYPICAL CONTROL APPLICATIONS

The appliance can be used with the following controls:

● twin-channel programmers.

The appliance can be used in conjunction with typical ‘S’-Plan systems and ’Y’-Plan systems. Please contact Vokera technical should you require further detailed instruction.

9.1.1 EXTERNAL WIRING LIMITATIONS

Low voltage and High voltage cables must be run separately.

Any external wiring must remain within the limits as detailed:

room thermostat = 30-metres

9.1.2 OUTSIDE SENSOR

The outside sensor can be connected via a controls interface which enables a connection to be made directly on the PCB at plug CN6 (see “Fig. 43”).

9.2 OTHER DEVICES

Contact the controls manufacturer and/or Vokèra technical

department should you require more specic 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.energyefciency.gov.uk).

Fig. 41

BE11

NCNO

CN2

BE11

NCNO

CN2

CN1

IMPORTANT

• The boiler must always be supplied with a permanent 230V electrical supply.

• The room thermostat connection is low voltage (24 Vdc)

• Do not connect any controls or auxiliary equipment to the low-voltage terminal strip, other than that approved/supplied by Vokèra Ltd.

9.3 OTBUS CONNECTION

When an OTBus remote control is connected to the system, the boiler display shows the following screen:

In particular on the boiler display:

 it is no longer possible to set the boiler OFF/WINTER/sta-

tus (it is set by the OTBus remote control)

 the heating setpoint set on the boiler display is used only if

there are heat requests from the TA and the OTBus remote

control does not have a request if the parameter:

 P3.11 = 1

 P3.11 = 0 and the jumper on 1-2pin of X 21 is closed.

 to activate the COMBUSTION CHECK function with an

OTBus remote control connected, you must temporarily disable the connection by setting the parameter P8.03 = 0. Remember to reset this parameter once the function has nished.

We can see that it is not possible, with the OTBus remote control connected, to change the values of the parameter P4.12 and P4.23 from 0 to 1.

Fig. 42

Page 45

FUNCTIONAL DIAGRAM

brown

CN3

blue

F Hv

NOTE: L-N-E connection is advisable

TSC2

blue

S.E

brown

yellow/green

red (+)

blue (HS) pink (PWM)

grey (-)

CN10

F Lv

CN11

red

grey grey black

blue blue white

white white

R.S

F.T

F.S

F.O.H.T

-t°

CN13

CN8

CN7

CN11

CN10

CN9

CN6

CN5

CN12

CN4

CN3

CN2

AKL07N1 GAR

CN1

FA1

FA2

CN15

CN13

CN14

SW1

3.15A T

CN16

CN17

orange

F.S.(1)

red (+)

black (-)

yellow (B)

orange (A)

CN8

red (+) yellow (B) orange (A) black (-)

black (-)

orange (A)

yellow (B)

red (+)

SC0x

CE4 (removable connector

positioned under shelf)

-t°

Open

therm

OT+

External

sensor

CN1

CN2

black

BE11

blue

brown

2 1

5 4

1 2 43

OPEOPE

brown

blue

brown

pink

blue

CN2

GAS VALVE

Fuse 3.15A F

P.T

3 2 1

blue (sign.) brown (-)

black (alim.)

CN17

Fig. 43

P Pump

OPE Gas valve solenoids

F Hv Fan power supply 230 V

F Lv Fan signal control

S.E. Spark electrode

TSC2 Ignition transformer

P.T. Pressure transducer

F.O.H.T Flow over heat thermostat

F.S. Flue sensor

F.T. Flow thermistor (NTC)

R.S. Return thermistor (NTC)

AKL07N1 GAR Main PCB

SC0xx Digital display

BE11 On board relè PCB

P1 Reset selection potentiometer

P3 CO2 function fan speed regulation

CN1-CN17 Connectors

S.W.1 CO2 function button

F.S. (1) Flame sensor

F1 Fuse 3.15A T

F External fuse 3.15A F

M3 Terminal strip for electrical connection hight power

CE4 External link connector: (- A B +) Bus 485

Page 46

10 LPG INSTRUCTIONS

9.4 RELATED DOCUMENTS

BS 5440 PARTS 1 & 2 FLUES & VENTILATION REQUIREMENTS BS 5449 PART 1 FORCED CIRCULATION OF HOT WATER SYSTEMS BS 5482 PART 1 DOMESTIC BUTANE & PROPANE GAS BURNERS IN PERMAMENT DWELLINGS

BS 5546 INSTALLATION OF GAS HOT WATER SUPPLIES FOR DOMESTIC PURPOSES

BS 6798 INSTALLATION OF BOILERS OF RATED NOT EXCEEDING 60kW

10.1 TECHNICAL DATA

Gas Pressures VISION PLUS 20S VISION PLUS 25S VISION PLUS 30S

Inlet pressure 37.0 mbar 37.0 mbar 37.0 mbar

Heating maximum gas rate (kg/hr) 1.55 1.94 2.33

Minimum gas rate (kg/hr) 0.39 0.54 0.54

Injector size 3.8 mm 4.5 mm 4.5 mm

CO2 @ maximum output (%) 10.0 10.0 10.0

CO2 @ minimum output (%) 10.0 10.0 10.0

CO @ maximum output (ppm) 160 140 160

CO @ minimum output (ppm) 10 20 20

Slow ignition (rpm) CH maximum number of fan rotation (rpm)

Mimum number of fan rotation (rpm)

5.500 5.500 5.500

6.000 5.700 6.800

2.000 2.000 2.000

NOTE

Please refer to 3 - 3E and use the appropriate PPE when carrying out any of the actions or procedures contained within this section.

10.2 GAS CONVERSION

Conversion from a family gas to other family gas can be performed easily also when the boiler is installed.

This operation must be carried out by professionally qualied

personnel. The boiler is delivered to operate with methane gas (G20). To convert the boiler to propane gas (G31) use the specic accessory kits.

For disassembly, refer to the instructions below:

- remove the power supply to the boiler and close the gas tap

- remove the casing as indicated in paragraph ““4.7 CASING REMOVAL””

- unhook and rotate the dashboard forward

- remove the gas valve (A)

- remove the nozzle (B) contained in the gas valve and replace it with the one contained in the kit

After the conversion has been carried out, apply the

new identication label contained in the documentation

envelope.

10.3 COMPLETION

On completion of the combustion analysis check and/or any

gas valve adjustment, ret the plug (see paragraph ““8.4.1

Combustion check””). Remove the test probe from the test

point and ret the sealing screw/s and/or cap.

IMPORTANT A GAS TIGHTNESS CHECK MUST BE CARRIED OUT IF ANY GAS CARRYING COMPONENTS HAVE BEEN REMOVED, REPLACED OR DISTURBED.

ATTENTION Gas type and appliance output must be set according to the

specic appliance specication. Vokèra accepts no responsibility if the gas type is not correctly adjusted according to the

respective appliance specication as detailed on the appliance

data badge.

Fig. 44

- ret the gas valve

- reassemble the previously removed components

- power the boiler and open the gas tap.

Adjust the boiler as described in the paragraph ““8.10 Adjustments””.

The conversion must be carried out by qualied

personnel.

Page 47

COMMISSIONING: CO AND COMBUSTION RATIO CHECK

SET BOILER TO MAXIMUM RATE

stabilise. , insert analyser probe into air inlet sampling point.

Is O2 ≥20.6%

CHECK CO AND

YES

CHECK CO AND COMBUSTION

recording.

Turn off appliance and

and resolved.

Turn off appliance and call

YES

BEFORE CO AND COMBUSTION RATIO CHECK

The installation instructions should have been followed, gas type verified and gas supply pressure/rate checked as required prior to commissioning. As part of the installation process, ESPECIALLY WHERE A

FLUE HAS BEEN FITTED BY PERSONS OTHER THAN THE BOILER INSTALLER, visually check the integrity of the whole

flue system to confirm that all components are correctly assembled, fixed and supported. Check that the maximum flue lengths have not been exceeded and all guidance has been followed (e.g. Technical Bulletin 008). The flue gas analyser should be of the correct type, as specified by BS 7967. Before use, the flue gas analyser should have been maintained and calibrated as specified by the manufacturer. The installer must have the relevant competence for use of the analyser. Check and zero the analyser IN FRESH AIR, as per analyser

NOTE

The air/gas ratio valve is factory-set and must not be adjusted during commissioning unless this action is recommended, following contact with the Vokera technical help line. If any such adjustment is recommended and further checking of the boiler is required, the engineer must be competent to carry out this work and to use the flue gas analyser accordingly. If the boiler requires conversion to operate with a different gas family (e.g., conversion from natural gas to LPG) separate guidance will be provided by the Vokera technical help line and must be followed.

manufacturer’s instructions.

In accordance with, section 7.3, set boiler to operate at maximum rate (full load condition). Allow sufficient time for combustion to

Verify flue integrity

Analyser readings indicate that combustion products and inlet air are mixing. Further investigation of the flue is therefore required. Check that flue components are correctly assembled, fixed and supported as per boiler/flue instructions.

and CO2 < 0.2%?

COMBUSTION RATIO AT MAXIMUM RATE

With boiler still set at maximum rate, insert analyser probe into flue gas sampling point. Allow readings to stabilise before

Check that flue and flue terminal are not obstructed.

Vokera’s technical helpline

call Vokera’s technical helpline for advice. The appliance must not be commissioned until problems are identified

Check all seals around the appliance burner, internal flue seals, door and case seals. Rectify where necessary.

Is CO less than 350ppm AND CO/CO

2 ratio less

than 0.004?

for advice. The appliance must not be commissioned until problems are identified and resolved. If commissioning cannot be fully completed, the appliance must be disconnected from the gas supply in accordance with the GSIUR.

NOTE: Check and record CO and

combustion ratio at both maximum AND minimum rate before contacting the Vokera

Is CO less than 350ppm AND CO/CO

2 ratio

less than

0.004?

IIss CCOO << 335500ppppmm aanndd CCOO//CCO lleesss

tthhaann 00..000044 ?

rraattiioo

RATIO AT MINIMUM RATE

With boiler set at minimum rate, insert analyser probe into flue gas sampling point. Allow readings to stabilise before

SET BOILER TO MINIMUM RATE

In accordance with section 7.3, set boiler to operate at minimum rate (to minimum load condition). Allow sufficient time for combustion to stabilise.

Boiler is operating satisfactorily No further actions required.

Ensure test points are capped, boiler case is correctly replaced and all other commissioning procedures are completed. Complete Benchmark Checklist, recording CO and combustion ratio readings as required.

Page 48

Benchmark Commissioning &

Warranty Validation Service Record

It is a requirement that the boiler is installed and commissioned to the manufacturers’

To instigate the boiler warranty the boiler needs to be registered with the manufacturer within one month of the installation. The warranty rests with the end-user (consumer), and they should be made aware it is ultimately their responsibility to register with the manufacturer, within the allotted time period.

It is essential that the boiler is serviced in line with the manufacturers’ recommendations, at least annually. This must be carried out by a competent Gas Safe registered engineer. The service details should be recorded on the Benchmark Service and Interim Boiler Work Record and left with the householder. Failure to comply with the manufacturers’ servicing instructions and requirements will invalidate the warranty.

www.hhic.co.uk

This Commissioning Checklist is to be completed in full by the competent person who commissioned the boiler as a means of demonstrating compliance with the appropriate Building Regulations and then handed to the customer to keep for future reference.

Failure to install and commission according to the manufacturers’ instructions and complete this Benchmark Commissioning Checklist will invalidate the warranty. This does not affect the customer’s statutory rights.

www.centralheating.co.uk

Page 49

GAS BOILER SYSTEM COMMISSIONING CHECKLIST & WARRANTY VALIDATION RECORD

Address:

Boiler make and model:

Boiler serial number:

Commissioned by (PRINT NAME): Gas Safe registration number:

Company name: Telephone number:

Company email: Company address:

Commissioning date:

Heating and hot water system complies with the appropriate Building Regulations? Yes

Time, temperature control and boiler interlock provided for central heating and hot water Yes

Boiler Plus requirements (tick the appropriate box(s))

Boiler Plus option chosen for combination boiler in ENGLAND

Time and temperature control to hot water Cylinder thermostat and programmer/timer Combination boiler

Zone valves pre-existing Fitted Not required

Thermostatic radiator valves pre-existing Fitted Not required

Automatic bypass to system pre-existing Fitted Not required

pre-existing Fitted Not required

Water quality

What system cleaner was used? Brand: Product:

What inhibitor was used? Brand: Product:

pre-existing Fitted Not required

CENTRAL HEATING MODE measure and record (as appropriate)

Gas rate (for combination boilers complete DHW mode gas rate) m3/hr or ft3/hr

Central heating output left at factory settings? Yes No

If no, what is the maximum central heating output selected? kW

Dynamic gas inlet pressure mbar

Central heating return temperature °C

System correctly balanced/rebalanced? Yes

COMBINATION BOILERS ONLY

Is the installation in a hard water area (above 200ppm)? Yes No

Water scale reducer/softener pre-existing Fitted Not required

Brand: Product:

If yes- DHW expansion vessel pre-existing Fitted Not required

Pressure reducing valve pre-existing Fitted Not required

DOMESTIC HOT WATER MODE Measure and record

Gas rate m3/hr or ft3/hr

Dynamic gas inlet pressure at maximum rate mbar

Cold water inlet temperature °C

Hot water has been checked at all outlets Yes Temperature °C

CONDENSATE DISPOSAL

The condensate drain has been installed in accordance with the manufacturers’ instructions and/or BS5546/BS6798 Yes

Point of termination Internal External (only where internal termination impractical)

Method of disposal Gravity Pumped

ALL INSTALLATIONS

Record the following

At max rate: CO ppm CO

At min rate (where possible) CO ppm CO

The operation of the boiler and system controls have been demonstrated to and understood by the customer Yes

The manufacturers’ literature, including Benchmark Checklist and Service Record, has been explained and left with the customer Yes

Commissioning Engineer’s signature

Customer’s signature

Weather compensation Smart thermostat with automisation and optimisation

Load compensation Flue Gas Heat Recovery

instructions Yes

Yes No

% CO/CO

instructions, and readings are correct? Yes

Ratio

°C

www.centralheating.co.uk

Page 50

SERVICE & INTERIM BOILER WORK RECORD

It is recommended that your boiler and heating system are regularly serviced and maintained, in line with manufacturers’ instructions, and that the appropriate service / interim work record is completed.

Service provider

When completing a service record (as below), please ensure you have carried out the service as described in the manufacturers’ instructions. Always use the

SERVICE/INTERIM WORK ON BOILER delete as appropriate

Engineer name: Company name:

Telephone N

Max rate CO ppm CO

Min rate CO ppm CO

undertaken in accordance with manufacturers’ instructions, and readings are correct?”

Gas rate: m

System inhibitor concentration has been checked and appropriate action taken, in accordance with BS 7593 and boiler manufacturers’ instructions. *

: Gas Safe registration No:

/h OR ft3/h

delete as appropriate Yes No

% CO/CO

Date:

yes

yes n/a

Comments:

Signature:

instructions and BS 7593. It is only acceptable to not have undertaken this if the service engineers attendance visit was in between annual services to attend a non-water facing component.

SERVICE/INTERIM WORK ON BOILER delete as appropriate

Engineer name: Company name:

Telephone N

Max rate CO ppm CO

Min rate CO ppm CO

undertaken in accordance with manufacturers’ instructions, and readings are correct?”

Gas rate: m

: Gas Safe registration No:

/h OR ft3/h

delete as appropriate Yes No

% CO/CO

Date:

yes

SERVICE/INTERIM WORK ON BOILER delete as appropriate

Engineer name: Company name:

Telephone N

Max rate CO ppm CO

Min rate CO ppm CO

undertaken in accordance with manufacturers’ instructions, and readings are correct?”

Gas rate: m

System inhibitor concentration has been checked and appropriate action taken, in accordance with BS 7593 and boiler manufacturers’ instructions. *

: Gas Safe registration No:

/h OR ft3/h

delete as appropriate Yes No

% CO/CO

Date:

yes

yes n/a

Comments:

Signature:

instructions and BS 7593. It is only acceptable to not have undertaken this if the service engineers attendance visit was in between annual services to attend a non-water facing component.

SERVICE/INTERIM WORK ON BOILER delete as appropriate

Engineer name: Company name:

Telephone N

Max rate CO ppm CO

Min rate CO ppm CO

undertaken in accordance with manufacturers’ instructions, and readings are correct?”

Gas rate: m

: Gas Safe registration No:

/h OR ft3/h

delete as appropriate Yes No

% CO/CO

Date:

yes

System inhibitor concentration has been checked and appropriate action taken, in accordance with BS 7593 and boiler manufacturers’ instructions. *

yes n/a

Comments:

Signature:

instructions and BS 7593. It is only acceptable to not have undertaken this if the service engineers attendance visit was in between annual services to attend a non-water facing component.

SERVICE/INTERIM WORK ON BOILER delete as appropriate

Engineer name: Company name:

Telephone N

Max rate CO ppm CO

Min rate CO ppm CO

undertaken in accordance with manufacturers’ instructions, and readings are correct?”

Gas rate: m

System inhibitor concentration has been checked and appropriate action taken, in accordance with BS 7593 and boiler manufacturers’ instructions. *

: Gas Safe registration No:

/h OR ft3/h

delete as appropriate Yes No

% CO/CO

Date:

yes

yes n/a

Comments:

Signature:

instructions and BS 7593. It is only acceptable to not have undertaken this if the service engineers attendance visit was in between annual services to attend a non-water facing component.

System inhibitor concentration has been checked and appropriate action taken, in accordance with BS 7593 and boiler manufacturers’ instructions. *

yes n/a

Comments:

Signature:

instructions and BS 7593. It is only acceptable to not have undertaken this if the service engineers attendance visit was in between annual services to attend a non-water facing component.

SERVICE/INTERIM WORK ON BOILER delete as appropriate

Engineer name: Company name:

Telephone N

Max rate CO ppm CO

Min rate CO ppm CO

undertaken in accordance with manufacturers’ instructions, and readings are correct?”

Gas rate: m

System inhibitor concentration has been checked and appropriate action taken, in accordance with BS 7593 and boiler manufacturers’ instructions. *

: Gas Safe registration No:

/h OR ft3/h

delete as appropriate Yes No

% CO/CO

Date:

yes

yes n/a

Comments:

Signature:

instructions and BS 7593. It is only acceptable to not have undertaken this if the service engineers attendance visit was in between annual services to attend a non-water facing component.

www.centralheating.co.uk

Page 51

SERVICE & INTERIM BOILER WORK RECORD

Service provider

When completing a service record (as below), please ensure you have carried out the service as described in the manufacturers’ instructions. Always use the

SERVICE/INTERIM WORK ON BOILER delete as appropriate

Engineer name: Company name:

Telephone N

Max rate CO ppm CO

Min rate CO ppm CO

undertaken in accordance with manufacturers’ instructions, and readings are correct?”

Gas rate: m

System inhibitor concentration has been checked and appropriate action taken, in accordance with BS 7593 and boiler manufacturers’ instructions. *

: Gas Safe registration No:

/h OR ft3/h

delete as appropriate Yes No

% CO/CO

Date:

yes

yes n/a

Comments:

Signature:

instructions and BS 7593. It is only acceptable to not have undertaken this if the service engineers attendance visit was in between annual services to attend a non-water facing component.

SERVICE/INTERIM WORK ON BOILER delete as appropriate

Engineer name: Company name:

Telephone N

Max rate CO ppm CO

Min rate CO ppm CO

undertaken in accordance with manufacturers’ instructions, and readings are correct?”

Gas rate: m

: Gas Safe registration No:

/h OR ft3/h

delete as appropriate Yes No

% CO/CO

Date:

yes

SERVICE/INTERIM WORK ON BOILER delete as appropriate

Engineer name: Company name:

Telephone N

Max rate CO ppm CO

Min rate CO ppm CO

undertaken in accordance with manufacturers’ instructions, and readings are correct?”

Gas rate: m

System inhibitor concentration has been checked and appropriate action taken, in accordance with BS 7593 and boiler manufacturers’ instructions. *

: Gas Safe registration No:

/h OR ft3/h

delete as appropriate Yes No

% CO/CO

Date:

yes

yes n/a

Comments:

Signature:

instructions and BS 7593. It is only acceptable to not have undertaken this if the service engineers attendance visit was in between annual services to attend a non-water facing component.

SERVICE/INTERIM WORK ON BOILER delete as appropriate

Engineer name: Company name:

Telephone N

Max rate CO ppm CO

Min rate CO ppm CO

undertaken in accordance with manufacturers’ instructions, and readings are correct?”

Gas rate: m

: Gas Safe registration No:

/h OR ft3/h

delete as appropriate Yes No

% CO/CO

Date:

yes

System inhibitor concentration has been checked and appropriate action taken, in accordance with BS 7593 and boiler manufacturers’ instructions. *

yes n/a

Comments:

Signature:

instructions and BS 7593. It is only acceptable to not have undertaken this if the service engineers attendance visit was in between annual services to attend a non-water facing component.

SERVICE/INTERIM WORK ON BOILER delete as appropriate

Engineer name: Company name:

Telephone N

Max rate CO ppm CO

Min rate CO ppm CO

undertaken in accordance with manufacturers’ instructions, and readings are correct?”

Gas rate: m

System inhibitor concentration has been checked and appropriate action taken, in accordance with BS 7593 and boiler manufacturers’ instructions. *

: Gas Safe registration No:

/h OR ft3/h

delete as appropriate Yes No

% CO/CO

Date:

yes

yes n/a

Comments:

Signature:

instructions and BS 7593. It is only acceptable to not have undertaken this if the service engineers attendance visit was in between annual services to attend a non-water facing component.

System inhibitor concentration has been checked and appropriate action taken, in accordance with BS 7593 and boiler manufacturers’ instructions. *

yes n/a

Comments:

Signature:

instructions and BS 7593. It is only acceptable to not have undertaken this if the service engineers attendance visit was in between annual services to attend a non-water facing component.

SERVICE/INTERIM WORK ON BOILER delete as appropriate

Engineer name: Company name:

Telephone N

Max rate CO ppm CO

Min rate CO ppm CO

undertaken in accordance with manufacturers’ instructions, and readings are correct?”

Gas rate: m

System inhibitor concentration has been checked and appropriate action taken, in accordance with BS 7593 and boiler manufacturers’ instructions. *

: Gas Safe registration No:

/h OR ft3/h

delete as appropriate Yes No

% CO/CO

Date:

yes

yes n/a

Comments:

Signature:

instructions and BS 7593. It is only acceptable to not have undertaken this if the service engineers attendance visit was in between annual services to attend a non-water facing component.

www.centralheating.co.uk

Page 52

Vokèra Warranty Terms and Conditions

Vokèra Ltd offer customers the comfort of a parts and labour warranty repair service subject to the following terms and conditions.

Vokèra Ltd only obligation under the guarantee shall be to repair or replace the faulty appliance at Vokèra Ltd discretion. This will be carried out where a fault arises from defects within the appliance, caused by either material or workmanship of the manufacturer.

1. The boiler must have been installed and commissioned within 12 months of manufacture by a registered Gas

Safe (RGII ROI) installer in accordance with the guidelines in the installation and servicing booklet provided with the boiler.

2. This guarantee does not protect malfunction or damage arising from incorrect installation, commissioning or

maintenance procedures, as laid out in the installation handbook, inefficient flue system, poor or incorrect electricity, wrong gas supply or pressure, tampering by inexperienced persons and any other cause not directly due to manufacture.

3. Vokèra Ltd cannot accept responsibility for any costs arising from repair or maintenance carried out by any third

party.

4. The “Benchmark” commissioning sheet must be completed by the installer and left with the boiler for reference

purpose.

5. The warranty will commence from the date of installation. Without proof of purchase ie an invoice or completed

“Benchmark” commissioning sheet, the warranty will commence from the date of manufacture as detailed on the appliance data plate.

6. To qualify for the full term of warranty, the boiler must be serviced once annually by a Gas Safe Registered

Engineer (RGII ROI). Proof of annual service in accordance with the manufacturer’s instructions must be provided (e.g. Benchmark Service Record). If this condition is not met the period of warranty will extend to only 12 months from date of installation.

By registering your appliance, you will be helping us provide you with the best after sales service in the unlikely event that your boiler requires attention during the guarantee period.

If the boiler suffers a mechanical or an electrical breakdown or you require an annual service, please contact our Customer Care Centre on:

UK: 01274 866100

ROI: 056 7755057

Our normal working hours, excluding Bank holidays are:

8.15am - 5.00pm Monday to Friday

8.00am - 12.00pm Saturday (UK only)

We will arrange for an engineer or appointed agent, to inspect and repair, or where in our sole opinion repair is not economic, arrange to replace the boiler.

7. Health & Safety:

a. Engineers will only attend to boiler products where it is considered by the engineer that the installation does not

pose a risk to health and safety.

b. A permanently fixed access ladder must service installations in lofts or attics. Adequate lighting and permanently

fixed flooring must also be available.

c. Cupboard installations must provide minimum working clearances as detailed in the installation instructions.

Vokèra will not accept responsibility for the removal of cupboards, kitchen units or trims in order to gain access for repairs.

8. Warranty does not apply:

a. If the boiler is removed from its place of installation without our prior consent. b. To any defect, damage or breakdown caused by inadequate servicing of the boiler or by deliberate action,

accident, misuse or third party interference including modification or an attempted repair which does not fully comply with industry standards.

c. To any defect, damage or breakdown caused by the design, installation and maintenance of the central heating

system.

Page 53

d. To de-scaling or other work required as a result of hard water scale deposits or from damage caused by

aggressive water or sludge resulting from corrosion. Indications that such work may be required include a noisy

boiler, cold spots on radiators, sludge in pipes and poor circulation of the central heating system. e. If the claim/contact procedure set out in section 6 is not adhered to. f. To any other costs or expenses caused by or arising as a result of the breakdown of a Vokèra Boiler. g. To any costs incurred during delays in fixing reported faults.

9. We reserve the right to a charge a callout fee where:

a. There is no completed “Benchmark” commissioning sheet or equivalent control document present. b. There is incomplete or no service record(s) for each and every year the boiler has been installed. c. A fault cannot be found. d. The breakdown or fault has been caused by an event, which is excluded from the warranty – see section 8. e. Failure to cancel an agreed appointment prior to our engineers visit. f. The boiler is outside the period of warranty or the conditions of the warranty have not been met.

10. If we fit replacement parts or replace a boiler it will not extend the period of the warranty. All replaced parts or

boilers will become the property of Vokèra Ltd.

11. The warranty applies only where a Vokèra boiler has been installed in a domestic dwelling in the United Kingdom,

Northern Ireland or Republic of Ireland, to provide heat and/or hot water to the central heating system.

12. Vokèra Ltd warranty is offered in addition to the rights provided to a consumer by law. Details of these rights

can be obtained from a Trading Standards Authority or a Citizen Advice Bureaux.

Your Personal Details

Vokèra takes care of your personal details in order to protect your privacy. Below we detail how we use any data you provide us with and how we manage that data to protect it.

Personal data is collected by us confidentially and in accordance with data protection law regulations. Vokèra is registered as a data controller with the Information Commissioner’s Office.

Your personal data is only stored if you volunteer to provide it, for example, to request information, submit a service visit, or to register a product for purposes of warranties and surveys etc. Vokèra will only use your personal data to satisfy the request you have made, and will not disclose information to third parties without your prior consent.

Any personal data stored by Vokèra is protected to ensure unauthorised persons cannot access or disclose the data. Vokèra uses security measures to protect the data we collect, in order to prevent manipulation, loss and destruction. No user information provided is stored anywhere on the internet that can be accessed by the public.

Vokèra may like to inform you of products and services that you could be interested in, and request your opinion of our services. Participation is voluntary and you can request not to receive such communications at any time or request your details to be updated by emailing: marketing@vokera.co.uk.

Tel: 01274 866100 (UK), 056 7755057 (ROI)

UK:

Vokèra Ltd, Customer Care, Stubs Beck Lane, West 26 Business Park, Whitehall Road, Cleckheaton, BD19 4TT

ROI:

Vokèra Ltd, Customer Care, West Court, Callen, Co Kilkenny, Ireland , R95 PW40

Email: service@vokera.co.uk (UK), eire-service@vokera.co.uk (ROI)

Guarantor – Vokèra Ltd, Borderlake House, Unit 7 Riverside Ind Est, London Colney, Herts AL2 1HG

Page 54

Page 55

RANGE RATED - EN 15502

The max CH input of this boiler has been adjusted to_____ kW, equivalent to _____ rpm max CH fan speed.

Date___/____/____

Signature _____________________

Boiler serial number

_____________________

Cod. 20174791 - 07/20 - Ed. 2

Registered address:

Unit 7 Riverside Industrial Estate

www.vokera.co.uk

Sales, General Enquires

Vokèra Limited reserve the right to change

specication without prior notice

Consumers statutory rights are not affected.

Company Reg No: 1047779

Vokèra Ltd

Borderlake House

London Colney Herts AL2 1HG

www.vokera.ie

T 0844 391 0999 F 0844 391 0998

Vokèra Ireland

West Court, Callan

Co Kilkenny

T 056 7755057 F 056 7755060

Vokera Vision Plus 20S/25S/30S INSTALLATION AND SERVICING INSTRUCTIONS (Cod. 20174791 - 07/20 - Ed. 2)

Specifications and Main Features

Frequently Asked Questions

User Manual