Vokera VIBE MAX High Efficiency Combi Boiler Instruction Manual

VIBE MAX High Efficiency Combi Boiler

VIBE MAX
High efficiency combi boiler

Users Instructions
Installation & Servicing Instructions
VIBE MAX 26C G.C. N° 47-364-69 VIBE MAX 30C G.C. N° 47-364-70

THESE INSTRUCTIONS

°C

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.

1. THINGS YOU SHOULD KNOW…………………………………………… 2 2. GETTING STARTED………………………………………………………….. 5 3. WHAT IF…………………………………………………………………………… 8
SECTION 1 – DESIGN PRINCIPLES AND OPERATING SEQUENCE ……………………………………………………………………….. 10 SECTION 2 – TECHNICAL DATA ………………………………………….. 11 SECTION 3 – GENERAL REQUIREMENTS (UK) ……………………. 14 SECTION 3A – GENERAL REQUIREMENTS (EIRE)……………….. 15
SECTION 4 – INSTALLATION ………………………………………………. 17
SECTION 5 – COMMISSIONING & OPERATION…………………….. 21
SECTION 6 – SERVICING INSTRUCTIONS……………………………. 35

SECTION 7 – WIRING DIAGRAMS …………………………………………….. 36
SECTION 8 – LPG INSTRUCTIONS ………………………………………. 39
Commissioning checklist …………………………………………………… 40
Benchmark …………………………………………………………………….41-44
Vokèra Warranty Terms and Conditions…………………………..45-46
RANGE RATED This boiler can be adapted to the heat requirements of the system, and in fact it is possible to set the range rated parameter as shown in the specific paragraph. After setting the desired output report the value in the table on the back cover of this manual, for future references.

USERS INSTRUCTIONS
INTRODUCTION
Dear Customer Your Vokèra VIBE MAX boiler has been designed to meet and exceed the very latest standards in gas central heating technology, and if cared for, will give years of reliable use and efficiency. 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 and/or recycling centre.

1. THINGS YOU SHOULD KNOW

1.1 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.
1.2 ELECTRICAL SUPPLY
Please ensure that this appliance has been properly connected to the electrical supply by means of a double pole isolator or un-switched socket, and that the correct size of fuse (3 AMP) has been fitted. Warning: this appliance must be earthed!
1.3 WARRANTY REGISTRATION
Please take the time to register the appliance warranty using the documentation provided, call 0800 479 0751 (UK) or register online at www.vokera.ie to obtain your warranty confirmation code (please have your appliance warranty card to hand).
1.4 APPLIANCE COMMISSIONING
CHECKLIST (UK only)
The Benchmark 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.

1.5 HOW DOES IT WORK?
Your VIBE MAX boiler supplies heated water to your radiators and hot water to your hot water taps. The central heating is controlled via a time clock and any thermostats that your installer may have fitted. The boiler will light when it receives a request from the time clock via any thermostat that may be installed, or whenever a hot water outlet (tap) is opened. Your VIBE MAX 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.

1.6 DIMENSIONS
HEIGHT 26C-30C 700 mm

WIDTH 400 mm

DEPTH 275 mm

1.7 CLEARANCES REQUIRED

ABOVE BELOW LEFT SIDE RIGHT SIDE FRONT

165mm* 150mm^ 2mm 2mm 4mm***

• Consideration should be given to providing reasonable clearance for the insertion of a FGA probe.
  ** Disconnection of adjacent components may be required. Alternatively allow 25mm clearance for removal of side panels.
  *** Provided that a door or removal panel enables 450mm access for maintenance.
  ^ Can be reduced to 5mm if a removal panel enables 150mm for maintenance.

2

25

2

2

°C

165

1.8 FROST PROTECTION SYSTEM
The VIBE MAX 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 5°C for the main and for the DHW line. In particular the burner will be in ON status until the appliance temperature reaches 35°C for CH appliance and 55°C for DHW 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.

150

1.9 CONTROL PANEL
Your boiler is equipped with a large LCD display that indicates the appliance operating status.
Note: values in thousands are displayed/100, for example 6500 rpm = 65.0

A

C

°C

B

D

123

A and B

DHW setpoint adjustment Parameter selection

C and D

Heating setpoint adjustment Parameter setting

A+B

DHW Comfort menu (on the main page and with a status other than OFF)

B

Return to previous screen/cancel choice Press >2 sec to return to main page

1 Change operating status (OFF, SUMMER and WINTER)

2

Reset alarm (RESET) Interrupt venting cycle

Access to INFO menu

3

Access to parameter setting menu Access to password entry page

ENTER function

1+3 Key lock/unlock

2+3 When the boiler is OFF, activates combustion analysis (CO)

Connection to a WIFI device

Fault or deadline timer call for service

°C – °F rpm bar -psi

In the event of a fault together with the icon (apart from flame and water alarms Indicates presence of flame. In the event of a flame failure, the icon is Flashes with temporary water alarms, fixed with permanent alarm Present if heating mode is active; flashes with heating request in progress Present if DHW mode is active; flashes with DHW request in progress
Unit of measurement for temperature
Number of fan rotations
Pressure value

3

1.10 SETTING PASSWORD, ACCESS AND PARAMETER MODIFICATION
In the manual, whenever necessary
– enter the password to access the parameters
– choose, modify and/or confirm parameters follow the sequences involved – see table – for more immediate action

1888°C

.

rpm bar

or

or

Actions

Sequence

password entry

points 1 – 7

parameter choice modify and confirm parameter exit without saving return to the main screen

points 8-10 points 11-12a
point 12b point 13

Key pressure = – light: value progress of one unit at a time; – prolonged: fast forward.

1

1888°C

.

rpm bar

2 sec
2

1888°C

.

rpm bar

004 006

USER LEVEL

3

4

PAS 000

second long press
5

1888°C

.

rpm bar

password setting
8
301
parameter choice
11
002

6 or

INSTALLER (18) and SERVICE (53) LEVEL

1888°C

.

rpm bar

7
004

confirm password
9
301
or

first menu parameter
10
003

access to the chosen parameter

12a

12b

002
or

301

change range of the parameter

confirmation of the new value and return to the previous level

return to previous level without saving the value

13
301

14

°C

If the buttons are not pressed, after 60 seconds the interface will automatically return to the main screen.

pressure> 2 sec = exit from navigation

return to main screen

4

1.11 USER PROGRAMMABLE PARAMETERS

USER PARAMETERS

Value Password Value set in Personalised min max level the factory values

SETTINGS

004 MEASUREMENT UNIT 0 1 USER

0

1.12 INFO MENU
i0I02
access to info menu

i0I04
choise info

i0I05
or

b The

interface

automatically quits

3 01

the INFO menu if no key is pressed

for 60 sec

access to parameter value back to the previous level

PARAMETER NAME

I001

Screed heater hours

I002

Delivery probe

I003

Return probe

I004

Domestic hot water probe

I005

OT+ DHW setpoint

I008

Flue gas probe

I009

External probe

I010

External temperature for thermoregulation

I011

DHW flow rate

I012

Fan rotations

I015

Flue gas probe counter

I016

Delivery setpoint (main zone)

I017

OT+ CH setpoint

I018

System pressure

I028

Ionization current

I029

High efficiency mode

I032

DHW Comfort

I033

DHW special functions

I034

ID board

I035

FW board revision

I038

WIFI pendrive radio signal

I039

Alarm history 1 (the oldest)

I040

Alarm history 2

I041

Alarm history 3

I042

Alarm history 4

I043

Alarm history 5 (the latest)

I044

Reporting number of days for CFS

DESCRIPTION Number of hours of screed heater function activation Boiler delivery probe value Boiler return probe value DHW probe value with boiler in instantaneous mode DHW setpoint sent by OT+ remote control to the boiler Flue gas probe value Instantaneous external probe value
Filtered external probe value used in the temperature control algorithm to calculate the heating setpoint
DHW setpoint (only with OT+ connection) Number of fan rotations (rpm) Number of operating hours of the heat exchanger in “condensing mode” (values in thousands are displayed/100) Delivery setpoint for the main zone CH setpoint sent by OT+ remote control to the boiler The system pressure level Instantaneous ionization current detected by the detection electrode Indicates when the high efficiency mode is running DHW Comfort mode Special functions active for high DHW inlet temperatures Identification of the electronic board Firmware revision on the electronic board Not available
List of the last five alarms recorded
Number of days that have passed since the CFS signal appeared (707 = 0)

2. GETTING STARTED
2.1 BEFORE SWITCHING ON
Before switching the appliance on, please familiarise yourself with: how to isolate the appliance from the gas, water, and
electricity supplies; how to check and top-up ­ if necessary ­ the system water
pressure; any external thermostats and their functions; the appliance controls.
2.2 LIGHTING THE BOILER
Position the system’s main switch to the “on” position. Open the gas tap to allow the fuel to flow. When the power is enabled, all the icons and segments
will light up for 1 sec and the firmware revision will be visualised for 3 sec:

1888°C °F

.

rpm bar psi

The automatic venting cycle will then be launched (if it is
enabled) and will last 4 min (for the details, refer to the
paragraph “5.11 Venting cycle”). The interface will show the status active in that moment.

b Adjust the room thermostat to the required temperature
(~ 20°C) or, if the system is equipped with a timed thermostat or programmer, make sure it is “active” and adjusted (~20°C).
Bring the boiler to WINTER or SUMMER mode.

2.3 OPERATING STATUS
Pressing key 1, the operating type switches cyclically between OFF – SUMMER – WINTER and then OFF again.
In standby, the display shows the system pressure. It shows the delivery temperature if there is a heating request, or the DHW temperature if there is a DHW request.
CH delivery temperature

.15 850°C

.

bar

—

stand-by

DHW temperature

450°C

WINTER MODE The boiler activates the heating and DHW function. The presence of the ” ” icon indicates a heat request and burner switch-on.

5

SUMMER MODE The boiler activates the traditional DHW function.

WINTER

SUMMER

850 450 °C

°C

2.4 SETTING THE HEATING SETPOINT

2.8 TEMPORARY SWITCH-OFF
In the event of temporary absences (weekends, short breaks, etc.) set the status of the boiler to OFF.
AF1
—
AF2

600. °C

or

650. °C

or

first press

second press set CH setpoint value in steps of 0.5 °C

If no key is pressed for 5 sec, the set value is taken as the new heating setpoint.

2.5 SETTING THE HEATING SETPOINT WITH AN EXTERNAL PROBE
If an external probe is connected (optional) and temperature control is enabled (parameter 418=1), the delivery temperature value is selected automatically by the system, which quickly alters the ambient temperature on the basis of variations in the outdoor temperature.
Modifying the heating setpoint

-5°C or

5 °C or

The setpoint correction is in the range (-5 to +5°C). With parameter 418= 0, the boiler works with a fixed point.
2.6 SETTING THE DHW SETPOINT

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 burner ignition at the minimum output (then maintained until the delivery water temperature reaches 35°C); the display shows AF1 DHW anti-freeze: this function is activated if the temperature measured by the domestic hot water probe drops below 5°C. A heat request is generated in this phase, with burner ignition at the minimum output (then maintained until the delivery water temperature reaches 55°C); the display shows AF2 circulator anti-locking: The circulator activates every 24 hours of stop for 30 seconds.
2.9 SWITCHING OFF FOR LENGTHY PERIODS
If the boiler is not used for a long time, the following operations must be carried out: set the OFF status isolate the appliance from the electrical supply turn off the fuel and water taps of the heating and domestic
hot water system. In this case, the anti-freeze and anti-blocking systems are deactivated. Drain the heating and domestic water system if there is any risk of freezing.
2.10 KEYBOARD LOCK FUNCTION
To lock the keys:

705. °C

or

or

710. °C

805. °C

Loc

first press

second press set DHW setpoint value in steps of 0.5 °C

If no key is pressed for 5 sec, the displayed value is taken as the new DHW setpoint.

2.7 SAFETY STOP
If faults arise during ignition or operation, the boiler makes a “SAFETY STOP”. The display shows the error code in question. For the details, refer to “2.13 Faults and reporting”.

Reset function Contact the local Technical Assistance Centre if the reset attempts fail to reactivate normal operation.

A10 Res

• press again to unlock

2 sec

If there is a fault, key 2 remains active to allow the alarm to be reset.
2.11 ALARM HISTORY
The alarm history is active with parameter 701=1 (SERVICE). Alarms can be viewed: – info menu (from I039 to I043), in chronological order, from the oldest
to the most recent, up to a maximum of 5 – on OT+ remote control, if connected. When an alarm occurs several times in succession, it is stored only once. To reset the alarm, follow the instructions provided in paragraph “2.7 Safety stop”.

A10 Res

2 sec

2 sec

6

2.12 FEEDER BOTTLE FUNCTION
The Feeder Bottle function is used to block the value of the DHW setpoint, to prevent anyone from accidentally modifying it. To activate the function from the setpoint DHW screen:
1
275. °C
press
2

A41 A40
With fault A40 on the boiler it is necessary to top-up the system pressure in the following way: – open the filling valve slowly until you hear water entering the
system – close the filling valve, access the Info menu (“1.12 INFO
menu”, item I018) to check that the pressure value reaches 1-1.5 bar.

275. °C
and
press > 2 sec
3

control valve

double check- valve

flow pipe

temporary connection

control valve
supply pipe

Loc

to deactivate “Loc” press again

2.13 FAULTS AND REPORTING
If there is a fault, an error code “Axx” is shown on the display. In certain cases, the error code is accompanied by an icon:

FAULTS

ICONS DISPLAYED

flame failure A10

all faults except flame failure and water pressure

water pressure

Press to restore operation. After filling, run a venting cycle. If the pressure drop is very frequent, contact the Technical Assistance Centre.
Fault A60 Indicates a fault on the DHW probe; notwithstanding this, the appliance will continue to provide hot water at approximately 50°C. The intervention of the Technical Assistance Centre is required.
Fault A91 The boiler has a self-diagnosis system that signals the need to clean the primary heat exchanger on the basis of the total number of hours in certain operating conditions (alarm code A91). Fault A91 occurs when the counter exceeds the value of 2500 hours; this value can be checked in the “1.12 INFO menu”, item I015 (visualization/100, example 2500h = 25).

Reset function To reset boiler operation in the event of a fault, press:

A10 Res

2 sec
If the correct operating conditions have been restored, the boiler will start up again automatically. In the presence of a remote control, a maximum of 5 consecutive unlocking attempts are available. In this case, by pressing the boiler restores the initial attempts.
b If the attempts to reset the boiler do not work, contact
the Technical Assistance Centre.
FAULT A41 If the pressure value falls below the 0.3 bar safety value, the boiler shows the fault code A41 for a transitory time of 10 min. If the fault still persists after this time, fault code A40 will appear.

7

ERROR CODE
A10
A11 A20 A30 A40 A41 A42 A60
A70
A80
A90 A91 A58 A59 CFS SFS FIL >3.0 bar

ERROR MESSAGE Flame lockout
Condensate drain obstructed Flue gas exhaust/air suction obstructed
Extraneous flame Limit thermostat
Fan fault
Fill the system
Fill the system
Pressure transducer fault
DHW probe fault
Flow sensor fault Flow sensor overtemperature Flow/return sensor differential
Return probe fault Return probe overtemperature Return-flow sensor differential
Flue gas probe fault
Clean primary heat exchanger Low power supply voltage High power supply voltage Call Service Stop for Service
Low pressure – check system
High pressure – check system

3. WHAT IF…
3.1 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 office.
3.2 WHAT IF I HAVE FREQUENTLY TO TOP-UP 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.
3.3 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.
3.4 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.

DESCRIPTION OF TYPE OF ALARM
definitive
transitional definitive definitive definitive transitional definitive transitional transitional definitive definitive
transitional definitive definitive transitional transitional transitional transitional
signal definitive
signal signal

8

INSTALLATION AND SERVICING INSTRUCTIONS

INTRODUCTION
All installers are asked to follow the Benchmark Scheme by adhering to the Code of Practise, details of which can be obtained from www.benchmark.org.uk. The VIBE MAX boiler is an appliances that incorporates electronic ignition, circulating pump, expansion vessel, safety valve, pressure transducer and automatic by-pass. The VIBE MAX range is produced as room sealed, category II2HY203P appliances, suitable for internal wall mounting applications only. Each appliance is provided with a fan powered flue outlet with an annular co- axial combustion air intake that can be rotated ­ horizontally ­ through 360 degrees for various horizontal or vertical applications. The VIBE MAX is approved for use with C13 & C33 type flue 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 downloaded from the Vokera website (www.vokera.co.uk).

VIBE MAX 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 and/or recycling centre.

General layout
1 Domestic hot water NTC probe 2 Safety valve 3 Pressure transducer 4 Syphon 5 3-way valve 6 Fan 7 Mixer 8 Flow thermistor (NTC) 9 Limit thermostat 10 Electrode 11 Burner 12 Fume analysis cap 13 Top flue outlet 14 Flue sensor 15 Main heat exchanger 16 Expansion vessel 17 Return thermistor (NTC) 18 Degassing pipe 19 Injector 20 Gas valve 21 Air vent valve 22 Pump 23 Flowmeter 24 Drain valve 25 DHW exchanger

F O G

I

R

F Heating flow connection O Hot water outlet G Gas connection I Cold water inlet R Heating return connection

Fig. 1

9

1 DESIGN PRINCIPLES AND OPERATING SEQUENCE

1.1 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 flame supervision · Integral high-head pump · Fan · Expansion vessel · Water pressure transducer · Flue sensor · Safety valve.
1.2 MODE OF OPERATION (AT REST)
When the appliance is at rest and there are no requests for heating or hot water, the following functions are active: · frost-protection system: the frost-protection system protects
the appliance against the risk of frost damage both for CH and DHW. 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. Moreover if the DHW temperature falls to 5°C, the appliance will function on minimum power until the temperature on main reaches 55°C. · anti-block function: the anti-block function enables the pump and diverter valve actuator to be energised for short periods, when the appliance has been inactive for more than 24-hours.
1.3 MODE OF OPERATION (HEATING)
When there is a request for heat via the time clock and/or any external control, the pump and fan are started, the fan speed will modulate until the correct signal voltage is received at the control PCB. At this point an ignition sequence is enabled. Ignition is sensed by the electronic circuit to ensure flame stability at the burner. Once successful ignition has been achieved, the electronic circuitry starts from 60% of the maximum and every 15 minutes it increases by 10%.

Thereafter, the boiler’s output will either be increase to maximum or modulate to suit the set requirement. When the appliance reaches the desired temperature the burner will shut down and the boiler will perform a three- minute anti-cycle (timer delay). When the request for heat has been satisfied the appliance pump and fan may continue to operate to dissipate any residual heat within the appliance.
1.4 MODE OF OPERATION (HOT WATER)
When there is a request for DHW via a hot water outlet or tap, 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 flame stability at the burner. Once successful ignition has been achieved, the electronic circuitry increases the gas rate to maximum or will modulate output to stabilise the temperature. In the event of the appliance exceeding the desired temperature (set point) the burner will shut down until the temperature drops. When the request for DHW has been satisfied the appliance pump and fan may continue to operate to dissipate any residual heat within the appliance.
1.5 SAFETY DEVICES
When the appliance is in use, safe operation is ensured by: · a water pressure transducer that monitors system water pres-
sure 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; · flame sensor that will shut down the burner when no flame signal is detected; · flue sensor; · a safety valve which releases excess pressure from the primary circuit.

primary heat exchanger
limit thermostat
delivery sensor

return sensor

automatic by-pass
pressure transducer
three-way valve

safety valve

CH flow
Fig. 2
10

DWH sensor

button AAV

DHW outlet

flow regulator

flowmeter

DHW filter

DHW

CH

inlet

return

expension vessel
pump system drain tap

2 TECHNICAL DATA

Central Heating

VIBE MAX 26C

VIBE MAX 30C

Heat input (kW)

20.00***

25.00***

Maximum heat output (kW) 60/80°C

19.38

24.38

Minimum heat output (kW) 60/80°C

2.94

3.79

Maximum heat output (kW) 30/50°C

20.92

26.78

Minimum heat output (kW) 30/50°C

3.04

4.09

Heat input range rated (Qn) (kW)

20.00

25.00

Minimum heat input range rated (Qm) (kW)

8.20

12.00

Minimum working pressure

0.25÷0.45 bar

Maximum working pressure

2.5 bar

Minimum flow rate

350 l/h

Domestic Hot Water

VIBE MAX 26C

VIBE MAX 30C

Heat input (kW)

25.00***

30.00***

Flow Rate: T35°C

10.20

12.30

Maximum inlet pressure

8 bar

Minimum inlet pressure

0.5 bar

Minimum flow rate

2 l/min

(***) The rated heat input with gas G20.2 (I2Y20) undergoes a reduction:

– VIBE MAX 26C: Qn heating = 18kW; Qn DHW = 23kW

– VIBE MAX 30C: Qn heating = 23kW; Qn DHW = 27,5kW.

Gas Pressures

VIBE MAX 26C

VIBE MAX 30C

Nominal methane gas pressure (G20 – I2H)

20.0 mbar

20.0 mbar

Nominal methane-hydrogen gas pressure (G20.2 I2Y20)

20.0 mbar

20.0 mbar

Heating maximum gas rate (m3/hr)

2.12

2.64

DHW maximum gas rate (m3/hr)

2.64

3.17

Minimum gas rate (m3/hr)

0.33

0.42

Injector size (mm)

4.5

5.1

Fan speed (G20)

VIBE MAX 26C

VIBE MAX 30C

Slow ignition (rpm)

5.500

5.500

CH maximum number of fan rotation (rpm)

7.000

6.900

DHW maximum number of fan rotation (rpm)

8.700

8.300

Mimum number of fan rotation (rpm)

1.500

1.500

Expansion Vessel

VIBE MAX 26C

VIBE MAX 30C

Capacity

8 litres

Maximum system volume

74 litres

Pre-charge pressure

1 bar

Dimensions

VIBE MAX 26C

VIBE MAX 30C

Height (mm)

700

Width (mm)

400

Depth (mm)

275

Dry weight (kg)

28.5

30

Clearances

VIBE MAX 26C

VIBE MAX 30C

Sides

2mm*

Top

165mm from casing or 25mm above flue elbow (whichever is applicable)

Bottom

150mm^

Front

4mm^^

• Disconnection of adjacent components may be required. Alternatively allow 25mm clearance for removal of side panels.

** Consideration should be given to providing reasonable clearance for the insertion of a FGA probe.

^ This can be reduced to 5mm if a removal panel enables 150mm for maintenance

^^ Provided that a door or removal panel enables 450mm access for maintenance.

Connections

VIBE MAX 26C

VIBE MAX 30C

Flow & return

22mm

Gas

15mm

DHW hot & cold

15mm

Safety valve

15mm

Condense

21mm

Electrical

VIBE MAX 26C

VIBE MAX 30C

Power consumption (Watts) DHW

98

105

Power consumption (Watts) CH

65

88

Voltage (V/Hz)

230/50

Internal fuse

4A T (for PCB) – 3.15A F (for connections block)

External fuse

4A

11

Flue Details (concentric 60-100) Maximum horizontal flue length (60/100mm) Maximum vertical flue length (60/100mm) Efficiency SEDBUK 2005 (%) Emissions CO2 @ maximum output (%) CO2 @ minimum output (%) CO @ maximum output (ppm) CO @ minimum output (ppm) NOx rating

VIBE MAX 26C 5.85m 6.85m
VIBE MAX 26C
89.8 VIBE MAX 26C
9.0 9.0 140 10 class 6

VIBE MAX 30C 4.85m 5.85m
VIBE MAX 30C
90.0 VIBE MAX 30C
9.0 9.0 150 10 class 6

Parameter

Symbol VIBE MAX 26C VIBE MAX 30C Unit

Seasonal space heating energy efficiency class

–

A

A

–

Water heating energy efficiency class

–

A

A

–

Rated heat output

Pnominal

19

24

kW

Seasonal space heating energy efficiency

s

93

93

%

Useful heat output

At rated heat output and high-temperature regime (*)

P4

19,4

24,4

kW

At 30% of rated heat output and low-temperature regime (**)

P1

6,5

8,2

kW

Useful efficiency

At rated heat output and high-temperature regime (*)

4

87,3

87,6

%

At 30% of rated heat output and low-temperature regime (**)

1

98,5

98,2

%

Auxiliary electricity consumption

At full load

elmax

32,0

38,0

W

At part load

elmin

12,0

12,0

W

In Stand-by mode

PSB

3,0

3,0

W

Other parameters

Stand-by heat loss

Pstby

30,0

32,0

W

Pilot flame energy consumption

Pign

–

–

W

Annual energy consumption

QHE

42

56

GJ

Sound power level, indoors

LWA

50

53

dB

Emissions of nitrogen oxides

NOx

22

22

mg/kWh

For combination heaters

Declared load profile

XL

XL

Water heating energy efficiency

wh

84

84

%

Daily electricity consumption

Qelec

0,133

0,152

kWh

Daily fuel consumption

Qfuel

23,183

23,306

kWh

Annual electricity consumption

AEC

29

33

kWh

Annual fuel consumption

AFC

18

18

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).

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 OUTDOOR TEMPERATURE SENSOR CONTROL PANEL OUTDOOR TEMPERATURE SENSOR + CONTROL PANEL

CLASS II V VI

BONUS 2% 3% 4%

(*) Set as ambient regulator

12

2.1 PUMP DUTY
Fig. 4 shows the flow-rate available ­ after allowing for pressure loss through the appliance ­ for system requirements. When using this graph, apply only the pressure loss of the system.
Variable speed circulator The modulating circulator function is active only in the heating function. When switching the three-way to the domestic hot water, the circulator always works at maximum speed. The modulating circulator function is only applied to the boiler circulator and not to circulators of any connected external devices (e.g. booster circulator). In this mode the boiler card determines which flow rate value to adopt according to the instantaneous power delivered by the boiler. By entering parameter 405 it is possible to change the extent of the modulation: 100 = no modulation 60 = modulation max 85 = default value

residual head (mbar)

700 650 600 550 500 450 400 350 300 250 200 150 100
50 0 0

default 85

100

200

300

400

500

600

700

800

900

1000 1100 1200 1300 1400

flow rate (l/h)

Fig. 3

Fig. 4

Key Location
A Below an opening (window, air-brick, etc.) B Above an opening (window, air- brick, etc.) C To the side of an opening (window, air-brick, etc.) D Below gutter, drain-pipe, etc. E Below eaves F Below balcony, lowest point of carport roof, etc. G To the side of a soil/drain-pipe, etc. H From internal/external corner I Above ground, roof, or balcony level J From a surface or boundary facing the terminal K From a terminal facing a terminal L From an opening in the car-port into the building M Vertically from a terminal on the same wall N Horizontally from a terminal on the same wall P From a structure to the side of the vertical terminal Q From the top of the vertical terminal to the roof flashing
R To the side of a boundary S To the side of an opening or window on a pitched roof T Below an opening or window on a pitched roof V From a vertical terminal to an adjacent opening (window, air-brick, etc.) W From a vertical terminal to an adjacent vertical terminal

Minimum distance
300 mm 300 mm 300 mm 25 mm 25 mm 25 mm 25 mm (60mm for 80/125mm) 25 mm (60mm for 80/125mm) 300 mm 600 mm* 1200 mm 1200 mm 1500 mm 300 mm 300 mm As determined by the fixed collar of the vertical terminal 300 mm 600 mm 2000 mm 2000 mm 300 mm (only if both terminals are the same height)

*The possibility that this may be deemed as causing a nuisance, should be considered

13

3 GENERAL REQUIREMENTS (UK)

BS 5440 BS 5440 BS EN 12828 BS 5546 BS 6798 BS 6891
BS 7074

PART 1 PART 2
PART 1

FLUES FLUES & VENTILATION DESIGN FOR WATER-BASED HEATING SYSTEMS INSTALLATION OF GAS HOT WATER SUPPLIES FOR DOMESTIC PURPOSES
INSTALLATION OF BOILERS OF RATED INPUT NOT EXCEEDING 60kW
LOW PRESSURE INSTALLATION PIPES APPLICATION, SELECTION, AND INSTALLATION OF EXPANSION VESSELS AND ANCILLARY EQUIPMENT FOR SEALED WATER SYSTEMS

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 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.
3.2 LOCATION OF APPLIANCE
The appliance may be installed in any room or internal space, although particular attention is drawn to the requirements of the current I.E.E. wiring regulations, and in Scotland, the electrical provisions of the Building Regulations, with respect to the installation of the appliance in a room or internal space containing a bath or shower. When an appliance is installed in a room or internal space containing a bath or shower, the appliance or any control pertaining to it must not be within reach of a person using the bath or shower. The location chosen for the appliance must permit the provision of a safe and satisfactory flue and termination. The location must also permit an adequate air supply for combustion purposes and an adequate space for servicing and air circulation around the appliance. Where the installation of the appliance will be in an unusual location special procedures may be necessary, BS 6798 gives detailed guidance on this aspect. A compartment used to enclose the appliance must be designed and constructed specifically for this purpose. An existing compartment/cupboard may be utilised provided that it is modified to suit. Details of essential features of compartment/cupboard design including airing cupboard installations are given in BS 6798. This appliance is not suitable for external installation.
3.3 GAS SUPPLY
The gas meter ­ as supplied by the gas supplier ­ must be checked to ensure that it is of adequate size to deal with the maximum rated input of all the appliances that it serves. Installation pipes must be fitted in accordance with BS 6891. Pipe work from the meter to the appliance must be of adequate size. Pipes of a smaller size than the appliance gas inlet connection must not be used. The installation must be tested for tightness in accordance with BS6891. If the gas supply serves more than one appliance, it must be ensured that an adequate supply is maintained to each appliance when they are in use at the same time.
14

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. 4”). In cold and/or humid weather, water vapour will condense on leaving the terminal; the effect of such pluming must be considered. If installed less than 2m above a pavement or platform to which people have access (including balconies or flat roofs) the terminal must be protected by a guard of durable material. The guard must be fitted centrally over the terminal. Refer to BS 5440 Part 1, when the terminal is 0.5 metres (or less) below plastic guttering or 1 metre (or less) below painted eaves. 3.5 AIR SUPPLY The following notes are intended for general guidance only. This appliance is a room-sealed, fan-flued boiler, consequently it does not require a permanent air vent for combustion air supply. When installed in a cupboard or compartment, ventilation for cooling purposes is also not required. 3.6 WATER CIRCULATION Detailed recommendations are given in BS EN 12828 and BS 6798. The following notes are for general guidance only. 3.6.1 PIPEWORK It is recommended that copper tubing to BS 2871 Part 1 is used in conjunction with soldered capillary joints. Where possible pipes should have a gradient to ensure air is carried naturally to air release points and that water flows naturally to drain cocks. Except where providing useful heat, pipes should be insulated to avoid heat loss and in particular to avoid the possibility of freezing. Particular attention should be paid to pipes passing through ventilated areas such as under floors, loft space and void areas. 3.6.2 AUTOMATIC BY-PASS The appliance has a built-in automatic by-pass, consequently there is no requirement for an external by-pass, however the design of the system should be such that it prevents boilercycling’.
3.6.3 DRAIN COCKS These must be located in accessible positions to facilitate draining of the appliance and all water pipes connected to the appliance. The drain cocks must be manufactured in accordance with BS 2879.
3.6.4 AIR RELEASE POINTS These must be positioned at the highest points in the system where air is likely to be trapped. They should be used to expel trapped air and allow complete filling of the system.
3.6.5 EXPANSION VESSEL The appliance has an integral expansion vessel to accommodate the increased volume of water when the system is heated. It can accept up to 8 litres of expansion from within the system, generally this is sufficient, however if the system has an unusually high water content, it may be necessary to provide additional expansion capacity.

3.6.6 FILLING POINT A method for initial filling of the system and replacing water lost during servicing etc. directly from the mains supply, is provided (see Fig. 14). This method of filling 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. 5.
3.6.7 LOW PRESSURE SEALED SYSTEM An alternative method of filling the system would be from an independent make-up vessel or tank mounted in a position at least 1 metre above the highest point in the system and at least 5 metres above the boiler (see “Fig. 6”). The cold feed from the make-up vessel or tank must be fitted with an approved non-return valve and stopcock for isolation purposes. The feed pipe should be connected to the return pipe as close to the boiler as possible.
3.6.8 FREQUENT FILLING Frequent filling or venting of the system may be indicative of a leak. Care should be taken during the installation of the appliance to ensure all aspects of the system are capable of withstanding pressures up to at least 3 bar.
3.7 ELECTRICAL SUPPLY
The appliance is supplied for operation on 230V @ 50Hz electrical supply; it must be protected with a 3-amp fuse. The method of connection to the mains electricity supply must allow for complete isolation from the supply. The preferred method is by using a double-pole switch 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 floating’ earth ormodified’ sine wave.
Warning! This appliance must be earthed.
3.8 MOUNTING ON A COMBUSTIBLE SURFACE
The appliance can be mounted on a wall of combustible material without any requirement to fit any additional protective (fire-resistant) material.
3.9 TIMBER FRAMED BUILDINGS
If the appliance is to be fitted in a timber framed building, it should be fitted in accordance with the Institute of Gas Engineers publication (IGE/UP/7) `Guide for Gas Installations in 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 flushing 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.
3.11 SHOWERS
If the appliance is intended for use with a shower, the shower must be thermostatically controlled and be suitable for use with a combination boiler.

Fig. 5 control valve

double check- valve

control valve

flow pipe

temporary connection

supply pipe

5.0 metres minimum

Automatic air-vent

Make-up vessel or tank

Non-return valve

Stopcock

°C

Heating return

Fig. 6

3E GENERAL REQUIREMENTS (EIRE)

This appliance must be installed by a competent person in accordance with and defined by, the Standard Specification (Domestic Gas Installations) Declaration (I.S. 813).
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 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 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 the current ETCI National Rules for Electrical Installations, and I.S. 813, Annex K. When an appliance is installed in a room or internal space containing a bath or shower, the appliance or any control pertaining to it must not be within reach of a person using the bath or shower. The location chosen for the appliance must permit the provision of a safe and satisfactory flue and termination. The location must also permit an adequate air supply for combustion purposes and an adequate space for servicing and air circulation around the appliance.

15

Where the installation of the appliance will be in an unusual location special procedures may be necessary, refer to I.S. 813 for detailed guidance on this aspect. A compartment used to enclose the appliance must be designed and constructed specifically for this purpose. An existing compartment/cupboard may be utilised provided that it is modified to suit. This appliance is not suitable for external installation.
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 fitted in accordance with I.S. 813. Pipe work from the meter to the appliance must be of adequate size. Pipes of a smaller size than the appliance gas inlet connection must not be used. The installation must be tested for 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 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. 3.4E 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 flat roofs) the terminal must be protected by a guard of durable material. The guard must be fitted centrally over the terminal. Refer to I.S. 813, when the terminal is 0.5 metres (or less) below plastic guttering or 1 metre (or less) below painted eaves. 3.5E AIR SUPPLY The following notes are intended for general guidance only. This appliance is a room-sealed, fan-flued boiler, consequently it does not require a permanent air vent for combustion air supply. When installed in a cupboard or compartment, ventilation for cooling purposes is also not required. 3.6E WATER CIRCULATION Specific 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 carried naturally to air release points and that water flows naturally to drain cocks. Except where providing useful heat, pipes should be insulated to avoid heat loss and in particular to avoid the possibility of freezing. Particular attention should be paid to pipes passing through ventilated areas such as under floors, loft space and void areas. 3.6.2E 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 boilercycling’.
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 filling 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 specification table for more detailed information.
16

3.6.6E FILLING POINT
A method for initial filling of the system and replacing water lost during servicing etc. directly from the mains supply, is provided (see Fig. 14). This method of filling complies with the current Water Supply (Water Fittings) Regulations 1999 and Water Bylaws 2000 (Scotland).
3.6.7E LOW PRESSURE SEALED SYSTEM
An alternative method of filling the system would be from an independent make- up vessel or tank mounted in a position at least 1 metre above the highest point in the system and at least 5 metres above the boiler (see “Fig. 6”). The cold feed from the make-up vessel or tank must be fitted with an approved non- return valve and stopcock for isolation purposes. The feed pipe should be connected to the return pipe as close to the boiler as possible.
3.6.8E FREQUENT FILLING
Frequent filling or venting of the system may be indicative of a leak. Care should be taken during the installation of the appliance to ensure all aspects of the system are capable of withstanding pressures up to at least 3 bar.
3.7E 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 double-pole switch fuse spur with a contact separation of at least 3,5 mm (3° high-voltage category). The switch must only supply the appliance and its corresponding controls, i.e. time clock, room thermostat, etc.
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 floating’ earth ormodified’ sine wave.
3.8E MOUNTING ON A COMBUSTIBLE SURFACE
The appliance can be mounted on a wall of combustible material without any requirement to fit any additional protective (fire-resistant) material.
3.9E TIMBER FRAMED BUILDINGS
If the appliance is to be fitted in a timber framed building, it should be fitted in accordance with I.S. 813 and local Building Regulations. The Institute of Gas Engineers publication (IGE/UP/7) `Guide for Gas Installations in Timber Frame Buildings’ gives specific advice on this type of installation.
3.10E 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 flushing 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 SHOWERS
If the appliance is intended for use with a shower, the shower must be thermostatically controlled and be suitable for use with a combination boiler.
3.12E DECLARATION OF CONFORMITY
A Declaration of Conformity (as defined in I.S. 813) must be provided on completion of the installation. A copy of the declaration must be given to the responsible person and also to the gas supplier if required.

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 anchor holes (see Fig. 7) and flue-hole (if applicable). Ensure that the anchors are securely fixed to support the appliance weight.
Fig. 7
A

Reduction for additional bends

Bend
45º bend 90º bend

Reduction in maximum flue length for each bend 1.0 metre
1.0 metre

Horizontal/Vertical flue terminals and accessories

Part No. 20122759 20122761 20122763 20132060

Description XF Horizontal Click fit’ Flue Kit XT TelescopicClick fit’ Flue Kit XV Vertical `Click fit’ Flue Kit 0.5-Metre Extension

Length/Size 796mm C/E 400-575mm C/E 1000mm + VC 500mm

20132061 20132062 20132059 20132058 20131979 20142842 20142841 20132050 20135582 20135587 20121903

1.0-Metre Extension 2.0-Metre Extension 90-Degree Bend 45-Degree Bend x 2 Telescopic Extension PMK Plume Kit 45° Plume divertor Pitched Roof Flashing Flat Roof Flashing Wall Brackets Vert. Connector `Click Fit’ VC

1000mm 2000mm N/A N/A 372/519mm 1370mm N/A 500mm x 500mm 340mm Dia. 208mm C/E 131mm

Fig. 7: Using the template (A) mark and drill a 125mm hole for the passage of the flue pipe. Both horizontal terminals (fixed & telescopic) have an eccentric configuration, that enables condense fluid to drain back to the appliance; consequently the terminals should be installed level.
NOTE: any horizontal runs that incorporate extensions, must have a 3-degree fall-back to the appliance.

B A
C

A C

Fig. 8

4.2 FITTING THE FLUE
This appliance incorporates a click-fit’ flue connection at the top of the appliance. 4.2.1 CONCENTRIC HORIZONTAL FLUE These instructions relate specifically to the installation of this appliance with the Vokera 60/100mmX-type’ (click-fit) flue terminals accessories. For specific instructions on installing this appliance with an alternative Vokera flue system, e.g. 80/125mm; please refer to the instructions supplied with the specific flue system, or download the instructions from the Vokera website. The appliance flue outlet elbow can be rotated through 360º on its vertical axis. In addition the flue may be extended from the outlet elbow in the horizontal plane. A reduction must also be made to the maximum length (see table below) when additional bends are used.

4.2.2 FITTING THE HORIZONTAL FLUE KIT Carefully measure the distance from the centre of the appliance flue outlet to the edge of the finished outside wall (dimension X). Add 65mm to dimension X to give you Dimension Y (see Fig. 9). Measure dimension Y from the terminal end of the concentric flue pipe and cut off the excess ensuring any burrs are removed. Pass the concentric flue pipe through the previously drilled hole. Fit the flue bend to the boiler flue outlet and insert the concentric flue pipe into the flue bend ensuring the correct seal is made.
NOTE (Fig. 8): The appliance incorporates a click-fit’ flue connection. Ensure that both screwsC’ on the click-fit’ have been slackened off. Ensure that the connector is correctly aligned with theclick-fit’ and insert it into the click-fit’ until it clicks into position (this is when the tabs at pointsA’ are located in the groove of the flue bend connector). Both screws (C) should now be tightened.
NOTE Fit the internal (white) trim to the flue assembly prior to connecting the flue pipe to the bend. You must ensure that the entire flue system is properly supported and connected. Seal the flue assembly to the wall using cement or a suitable alternative that will provide satisfactory weatherproofing. The exterior trim can now be fitted.

17

Fig. 9
Fig. 10
A
4.2.3 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-fit connections, care should be taken to ensure that the correct seal is made when assembling the flue system. Connect the required number of flue extensions or bends (up to the maximum equivalent flue length) to the flue terminal (Fig. 11). The flue system should have a 3º rise from the boiler to outside, to ensure any condense fluid that forms, is allowed to drain back to the appliance. NOTE When cutting an extension to the required length, you must ensure that the excess is cut from the plain end of the extension (Fig. 11). Remove any burrs, and check that all seals are located properly. You must ensure that the entire flue system is properly supported and connected. Seal the flue assembly to the wall using cement or a suitable alternative that will provide satisfactory weatherproofing. The interior and exterior trim can now be fitted.

4.2.4 CONCENTRIC VERTICAL FLUE Using Fig. 13 as a reference, cut a 110mm diameter hole in the roof and/or ceiling to facilitate the route of the vertical flue 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 flue outlet.

Fit the appropriate flashing to the roof and insert the vertical flue terminal through the flashing from outside, ensuring that the collar of the terminal is located over the outlet of the flashing.

The fixing holes for the appliance wall mounting bracket should now be drilled and plugged. An appropriate type and quantity of fixing should be used to ensure that the bracket is mounted securely. Once the bracket has been secured to the wall, mount
the appliance onto the bracket.

If the vertical flue system requires additional extensions or bends, connect these to the vertical terminal, ensuring the following: – the maximum permitted flue length is not exceeded – reductions to the maximum flue length have been made for
any bends that are used on the vertical flue system – any horizontal sections of the flue system, incorporate a
3-degree fallback to the appliance – the entire flue 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 flue system.

IMPORTANT: The VX flue 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 flue connector (supplied with the VX terminal).

NOTE (Fig. 12): The appliance incorporates a click-fit’ flue connection. Ensure that both screwsC’ on the click-fit’ have been slackened off. Ensure that the connector is correctly aligned with theclick-fit’ and insert it into the click-fit’ until it clicks into position (this is when the tabs at pointsA’ are located in the
groove of the vertical flue connector). Both screws (C) should now be tightened.

NOTE: If more convenient, the vertical flue connector can be attached to the vertical flue 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 fitted, a reduction must be made to the maximum flue length (see table below).

Reduction for bends

Bend 45º bend 90º bend

Reduction in maximum flue length for each bend 1.0 metre 1.0 metre

vertical connection

Fig. 12

B A C

A C

Fig. 11 18

flange installed as standard

NOTE: depending on system requirements, it may necessary
to increase the size of the flow & return pipe work after the service valve connections.

4.3.3 COLD WATER INLET The appliance is supplied with a 15mm combined stopcock and filling valve, connect a 15mm pipe to the inlet of the stopcock and tighten both nuts.

4.3.4 HOT WATER OUTLET The appliance is supplied with a 15mm outlet connection, connect a 15mm pipe to the outlet connection and tighten both nuts.

4.3.5 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, but

is still visible.

safety valve

system drain tap

Fig. 13

IMPORTANT The vertical flue terminal is 1.0 metre in length and cannot be cut; therefore it may be necessary to adjust the height of the appliance to suit or use a suitable extension.

4.3 CONNECTING THE GAS & WATER (FIG. 14)
The appliance is supplied with an accessory pack that includes 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 first then insert the sealing washers before tightening the valve to the appliance. NOTE: it will be necessary to hold the valve with one spanner whilst tightening with another.
The valves must be fitted perpendicular with the rear of the appliance, in order to avoid obstruction and ensure that the filling loop attaches correctly.

Fig. 14

C/H return valve
Cold water inlet

Gas cock

Hot water outlet

C/H flow valve

Filling loop
Safety valve connection pipe
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 flow and return connections, connect a 22mm pipe to the inlet of each valve and tighten both nuts.

siphon drain

Fig. 15

4.3.6 CONDENSE PIPE
This appliance will – under normal operating conditions – produce condensate fluid 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 fluid, 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.
4.4 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.
b All components of the product condensation drain system must
be properly maintained in accordance with the manufacturer instructions and cannot be modified in any way.
The condensation exhaust system downstream of the appliance must comply with the relevant legislation and standards.
19

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 between the condensation exhaust pipe of the appliance and the condensation exhaust system.
4.5 ELECTRICAL CONNECTIONS
The boiler is supplied w ith a short fly-lead. This lead can be used for connection to the electrical supply. Connect the fly-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 fly-lead be unsuitable, refer to 4.7 for details on how to connect the electrical supply directly to the boiler.
The electrical supply must be as specified in section 3/3E. A qualified 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 7 for detailed instructions. ANY EXTERNAL CONTROL OR WIRING MUST BE SERVED FROM THE SAME ISOLATOR AS THAT OF THE APPLIANCE. The supply cable from the isolator to the appliance must be 3-core flexible 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.
Low voltage connections CE4 connector: use 4-poles connector, supplied as standard, for connections with ModBus 485 signal, see section 7 `WIRING DIAGRAMS’ for advice on configuring the 485 BUS signal.
b We recommend using conductors with a section no larger than
0,5 mm2.

– A B+

4-poles ModBus connector (CE4)

Connection on the main board: make the TA (ambient thermostat), OT+ and SE (external sensor) connections on X11 connector – see section “7 WIRING DIAGRAMS”.

NOTE: when an OT+ remote control is connected to the system, if parameter 803=1 (SERVICE), the boiler display shows the following screen:

In particular on the boiler display: – it is no longer possible to set the
boiler OFF/WINTER/SUMMER status (it is set by the OT+ remote control) – it is no longer possible to set the domestic hot water setpoint (it is set by the OT+ remote control)

ot

20

– the combination of the A+B keys remains active for the setting of the DOMESTIC HOT WATER COMFORT function
– the domestic hot water setpoint (I005) is displayed in the INFO menu
– the heating setpoint value calculated by the OT+ remote control (I017) is displayed in the INFO menu
– the heating setpoint set on the boiler display is used only if there are heat requests from the TA and the OT+ remote control does not have a request if the parameter: 311 = 1. This value is displayed in the INFO menu (I016).
– to activate the “Combustion analysis” function with an OT+ remote control connected, you must temporarily disable the connection by setting the parameter 803 = 0 (SERVICE); remember to reset this parameter once the function has finished.
Key 3 remains active for the visualisation of the INFO menu and the enabling of the SETTINGS menu.
4.6 CASING REMOVAL
To gain internal access to the appliance you must first remove the casing, proceed as outlined below: · locate and unscrew the 2-screws that secure the outer ca-
sing 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- fit in
the reverse order · press and hold the spring tabs on either side of the control
panel where it meets the appliance side panels and gently lower it until it rests.
3
1
2
4.7 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 fitted (see section 7) route the electrical supply via the cable entry/ exit point and secure to the sleeve using an appropriate cable tie, and/or silicone sealant. The appliance comes with a factory fitted link (`TA’) to allow basic operation of the boiler via the mode selector switch. If it is anticipated that external controls will be required please refer to the wiring diagrams in section 7 for more detailed information.
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.

5 COMMISSIONING & OPERATION

NOTE: please refer to 3 – 3E and use the appropriate PPE when carrying out any of the actions or procedures contained within this section.
5.1 GAS SUPPLY INSTALLATION
Inspect the entire installation including the gas meter, test for tightness and purge. Refer to BS 6891 (I.S. 813 in ROI) for specific instruction.
5.2 THE HEATING SYSTEM
The appliance contains components that may become damaged or rendered inoperable by oils and/or debris that are residual from the installation of the system, consequently it is essential that the system be flushed in accordance with the following instructions.
5.3 INITIAL FILLING OF THE SYSTEM
Ensure both flow and return service valves are open, remove appliance casing as described in 4.6, identify the automatic air release valves (AAV) and loosen the dust cap/s by turning the cap anti-clockwise one full turn. Ensure all manual air release valves located on the heating system are closed. Connect the filling loop (not supplied), slowly proceed to fill the system by firstly opening the inlet valve connected to the flow pipe, and then turning the lever on the fill valve, to the open position. As water enters the system the pressure gauge will begin to rise. Once the gauge has reached 1 BAR close both valves and begin venting all manual air release valves, starting at the lowest first. It may be necessary to go back and top-up the pressure until the entire system has been filled. Inspect the system for water tightness, rectifying any leaks.
5.4 INITIAL FLUSHING OF THE SYSTEM
The whole of the heating system must be flushed both cold and hot as detailed in 5.6. Open all radiator or heating valves and the appliance flow & return service valve. Drain the boiler and system from the lowest points. Open the drain valve full bore to remove any installation debris from the boiler prior to lighting. Refill the boiler and heating system as described in 5.3.
5.5 PRELIMINARY CHECKS
Before starting up the boiler, check: – confirm via the appliance data badge, that the appliance is
suitable/configured for the gas type and electrical supply that has been provided to the appliance – inspect the entire flue system and ensure that it has been installed in accordance with these instructions and the relevant standards that apply locally and/or nationally – that the required clearances have been met in respect of the requirements for maintenance – inspect the entire installation including the gas meter, test for tightness and purge. Refer to BS 6891 (I.S. 813 in ROI) for specific instruction – ensure that the rated delivery of the gas meter is adequate enough to serve this appliance and any other gas appliance connected to the same meter – ensure that the gas supply pipework is of adequate size to provide the maximum gas rate required by this appliance – check that the siphon is completely filled with water, otherwise fill it up (see chapter 5.7).

5.6 FINAL FLUSHING OF THE HEATING SYSTEM
The system shall be flushed 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.
5.6.1 INHIBITORS See Section 3 “General Requirements”.
5.7 FIRST COMMISSIONING
On first ignition after prolonged inactivity and after maintenance, before putting the appliance into operation it is essential to fill the condensate collection siphon by pouring about 1 litre of water into the boiler combustion analysis take-off and check: – that the float within the trap is free and moving – the correct flow of water from the boiler outlet discharge
pipe – there are no leaks of the condensate drain connection line. Correct operation of the condensate drain circuit (siphon and pipes) requires that the condensate level does not exceed the maximum level (max). Prior filling of the siphon and the presence of the safety float inside the siphon is designed to prevent the escape of combustion gases into the environment.
High efficiency mode The boiler is equipped with an automatic function that is activated at the first power supply or after 60 days of non-use (electrically powered boiler). In this mode the boiler, for 60 minutes, limits the heating power to a minimum and the maximum DHW temperature to 55°C. Activating the chimney sweep temporarily disables this function. During execution, the water pressure icon flashes and the display shows:
502A °C .

21

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

A

C

Note: values in thousands are displayed/100, for example 6500 rpm = 65.0

°C

B

D

123

A and B

DHW setpoint adjustment Parameter selection

C and D

Heating setpoint adjustment Parameter setting

A+B

DHW Comfort menu (on the main page and with a status other than OFF)

B

Return to previous screen/cancel choice Press >2 sec to return to main page

1 Change operating status (OFF, SUMMER and WINTER)

2

Reset alarm (RESET) Interrupt venting cycle

Access to INFO menu

3

Access to parameter setting menu Access to password entry page

ENTER function

1+3 Key lock/unlock

2+3 When the boiler is OFF, activates combustion analysis (CO)

Connection to a WIFI device

Fault or deadline timer call for service

°C – °F rpm bar -psi

In the event of a fault together with the icon (apart from flame and water alarms Indicates presence of flame. In the event of a flame failure, the icon is Flashes with temporary water alarms, fixed with permanent alarm Present if heating mode is active; flashes with heating request in progress Present if DHW mode is active; flashes with DHW request in progress
Unit of measurement for temperature
Number of fan rotations
Pressure value

5.9 SETTING PASSWORD, ACCESS AND PARAMETER MODIFICATION
In the manual, whenever necessary
– enter the password to access the parameters – choose, modify and/or confirm parameters follow the sequences involved – see table – for more immediate
action

1888°C

.

rpm bar

or

or

Actions password entry parameter choice modify and confirm parameter exit without saving return to the main screen

Sequence points 1 – 7 points 8-10 points 11-12a point 12b
point 13

Key pressure = – light: value progress of one unit at a time; – prolonged: fast forward.

22

1

1888°C

.

rpm bar

2 sec
2

1888°C

.

rpm bar

004 006

USER LEVEL

3

4

PAS 000

second long press
5

1888°C

.

rpm bar

password setting
8
301
parameter choice
11
002

6
or

INSTALLER (18) and SERVICE (53) LEVEL

1888°C

.

rpm bar

7
004

confirm password
9
301
or

first menu parameter
10
003

access to the chosen parameter

12a

12b

002
or

301

change range of the parameter

confirmation of the new value and return to the previous level

return to previous level without saving the value

13
301

14

°C

If the buttons are not pressed, after 60 seconds the interface will automatically return to the main screen.

pressure> 2 sec = exit from navigation

return to main screen

23

5.10 INITIAL LIGHTING
Position the system’s main switch to the “on” position. Open the gas tap to allow the fuel to flow. When the power is enabled, all the icons and segments will
light up for 1 sec and the firmware revision will be visual-
ised for 3 sec:

5.13 SETTING THE HEATING SETPOINT

600. °C

or

650. °C

or

1888°C °F

.

rpm bar psi

The automatic venting cycle will then be launched (if it is enabled) and will last 4 min (for the details, refer to the paragraph “5.11 Venting cycle”).
The interface will show the status active in that moment.
b Adjust the ambient thermostat to the required
temperature (~ 20°C) or, if the system is equipped with a timed thermostat or programmer, make sure it is “active” and adjusted (~20°C).
Bring the boiler to WINTER or SUMMER mode.
5.11 VENTING CYCLE
Position the system’s master switch to the “on” position. Every time the boiler is powered, a 4-minute venting cycle is run. The display shows . To interrupt the venting cycle, press the key shown in the figure below.

ooo

1888°C

.

rpm bar

first press

second press set CH setpoint value in steps of 0.5 °C

If no key is pressed for 5 sec, the set value is taken as the new heating setpoint.

5.14 SETTING THE HEATING SETPOINT WITH AN EXTERNAL PROBE
If an external probe is connected (optional) and temperature control is enabled (parameter 418=1), the delivery temperature value is selected automatically by the system, which quickly alters the ambient temperature on the basis of variations in the outdoor temperature.
Modifying the heating setpoint

-5°C or

5 °C or

The setpoint correction is in the range (-5 to +5°C). With parameter 418= 0, the boiler works with a fixed point.
5.15 SETTING THE DHW SETPOINT

b When the venting cycle is running, all heat requests are
inhibited apart from DHW unless the boiler is OFF.
The venting cycle can also be interrupted (if the boiler is not OFF) by a DHW request.
5.12 OPERATING STATUS
Pressing key 1, the operating type switches cyclically between OFF – SUMMER – WINTER and then OFF again.
In standby, the display shows the system pressure. It shows the delivery temperature if there is a heating request, or the DHW temperature if there is a DHW request.
CH delivery temperature

.15 850°C

.

bar

—

stand-by

DHW temperature

450°C

WINTER MODE The boiler activates the heating and DHW function. The presence of the ” ” icon indicates a heat request and burner switch-on.
SUMMER MODE The boiler activates the traditional DHW function.

WINTER

SUMMER

850 450 °C

°C

705. °C

or

or

710. °C

first press

second press set DHW setpoint value in steps of 0.5 °C

If no key is pressed for 5 sec, the displayed value is taken as the new DHW setpoint.

5.16 SETTING THE THERMOREGULATION
The thermoregulation is only available if an external probe is connected, and is only active for the HEATING function. THERMOREGULATION is enabled in the following way: set parameter 418 =1. With 418 = 0 or the external probe disconnected, the boiler works with a fixed point. The temperature value measured by the external probe is visualised in “5.34 INFO menu” under item I009. The thermoregulation algorithm will not use the measured external temperature value directly, but rather a calculated external 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. This value can be viewed in the INFO menu under item I010.
REQUEST FROM OT CONTROL In this case, the delivery setpoint is calculated by chronohermostat on the basis of the external temperature value and the difference between the real ambient temperature and the required ambient temperature.
REQUEST FROM ROOM THERMOSTAT In this case, the delivery setpoint is calculated by the adjustment board on the basis of the external temperature value, to obtain an estimated ambient temperature value of 20° (reference ambient temperature). There are 2 parameters that compete to calculate the output setpoint: slope of the compensation curve (KT) – editable by technical
staff offset on the reference ambient temperature – editable by
the user.

24

TYPE OF BUILDING (parameter 432) It is indicative of the frequency with which the value of the calculated outdoor temperature for thermoregulation is updated, a low value for this value will be used for buildings that have little insulation.

SENSOR REACTIVITY (parameter 433) It is an indication of the speed with which variations of the measured outdoor temperature affect the calculated outdoor temperature value for thermoregulation, low values indicate high speeds.

CHOICE OF THE THERMOREGULATION CURVE (parameter 419) 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. delivery envisaged – Tshift 20- T. min. design external

Tshift = 30°C standard system 25°C floor system

If the calculation produces an intermediate value between two curves, you are advised to choose the thermoregulation curve closest to 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 floor system: 0,2÷0,8.

Parameter 419 can be used to set the required thermoregulation curve:

100 90
T HT 80

3,0 2,5 2,0 1,5

Delivery temperature (°C)

70

1,0

60

0,8

50 T LT

0,6

40

0,4

30

0,2

20
20 15 10 5 0 -5 -10 -15 -20 External temperature (°C)
T HT maximum heating setpoint temperature (standard systems) T LT maximum heating setpoint temperature (free-standing systems)

Offset on the reference ambient temperature In any case, the user can indirectly modify the HEATING setpoint value by defining, for the reference temperature (20°C), an offset that can vary within the range -5 to +5 (offset 0 = 20°C). For the correction of the offset, refer to paragraph “5.14 Setting the heating setpoint with an external probe”.

Delivery temperature (°C)

CLIMATIC CURVE CORRECTION 90

80

70

60

50

40

30

+5°C

20

20°C

10

-5°C

30 25 20 15 10 5 0 -5 -10 -15 -20

External temperature (°C)

Delivery temperature (°C)

NIGHT-TIME COMPENSATION (parameter 420) If a timer is connected to the AMBIENT THERMOSTAT input, parameter 420 can be used to enable night-time compensation. Set parameter 420 = 1 In this case, when the CONTACT is CLOSED, the heat request is made by the flow 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).
PARALLEL NIGHT TIME REDUCTION 90
80
70
DAY TEMPERATURE CURVE
60
50
NIGHT TEMPERATURE CURVE
40
30
20
10 20 15 10 5 0 -5 -10 -15 -20 External temperature (°C)
In this case too, the user can indirectly modify the HEATING setpoint value by defining an offset on the reference DAY temperature (20°C) or the reference NIGHT temperature (16°C) that can vary within the range [-5 to +5]. NIGHT COMPENSATION is not available if OT+ chrono is connected. For the correction of the offset, refer to paragraph “5.13 Setting the heating setpoint”.
5.17 “DHW COMFORT” FUNCTION 1
PHO

• 2 sec
  2
  PHO
  PH1
  PH1

Function PH0 PH1

Scrolling message NO function active PRE-HEATING function active

PH1 PRE-HEATING function Set PH1 to activate the DHW pre-heating function on the boiler. This function keeps the water in the domestic hot water exchanger hot, to reduce standby times when a request is made. The function is not active when the boiler is OFF.

5.18 DHW SPECIAL FUNCTIONS
Parameter 511 is used to activate special functions during the modulation phase in DHW mode. These functions improve the boiler performance in particularly hard operating conditions (such as very high inlet water temperatures, very low flow rates, use in combination with solar storage tanks).

0 No special function active (default value) 3 Absolute DHW thermostats 4 Smart DHW anti-oscillation function 5 All previous functions active

ABSOLUTE THERMOSTATS function (3) If this function is activated, the DHW thermostats for burner ON/ OFF switch from the relative value to the absolute one.
ANTI-OSCILLATION function (4) If this function is activated, the boiler self- configures to ABSOLUTE THERMOSTATS if the burner is OFF due to DHW overtemperature (with a request in progress). When the burner is OFF, the fan is kept at the minimum speed. The thermostats go back to being “correlated” at the end of the request.

25

5.19 FEEDER BOTTLE FUNCTION
The Feeder Bottle function is used to block the value of the DHW setpoint, to prevent anyone from accidentally modifying it. To activate the function from the setpoint DHW screen:
1
275. °C
press
2

5.21 COMBUSTION ANALYSIS
b Checks to verify the adjustments of the CO2 values in
relation to the reference parameters (given in the tables below) must be carried out with the casing closed. If the casing is opened, the values will have to be reduced by about 0.2% depending on the installation configuration (the type and length of the discharge and suction pipes).
Combustion control sequence
1
3

—

2

275. °C
and
press > 2 sec

The probe for the fumes analysis must

4

be inserted until it reaches the stop

3
Loc

to deactivate “Loc” press again

5.20 SCREED HEATER FUNCTION
With the system at a low temperature, the “screed heater” function enables a heating request with a delivery setpoint of 20°C in the initial zone. This value is then gradually increased as shown in the table below.

DAY 1
2
3 4 5 6 7

TIME 0 6 12 18 0 12 0 0 0 0 0

TEMPERATURE 20°C 22°C 24°C 26°C 28°C 30°C 32°C 35°C 35°C 30°C 25°C

This function lasts 168 hours (7 days).

To activate the screed heater function: set the boiler to OFF (because this function is only availa-
ble in this mode) set 409 = 1, the display will show

Co —

• 2 sec

600. rpm

600. rpm

fan speed in CH MAX
or MIN

The displayed value refers to the number of revolutions divided by 100.
Set the maximum rpm value

MAX rpm

700. rpm

700. rpm

confirm

The boiler works at the maximum power level.
Check the analyser to ensure the max CO2 value complies with the indication given in the table. If the value is different, calibrate the gas valve – see paragraph “5.23 Gas valve calibration”.

table 1

CO2 max

METHANE GAS (G20)

LPG (G31)

26C

9,0

10,0

%

30C

9,0

10,0

%

Set the minimum rpm value

ScR —
Once activated, this function takes maximum priority. If there is a power failure and reset, the function will resume from the point where it was interrupted. The screed heater function can be disabled by bringing the boiler to a condition other than OFF, or by setting 409 = 0.
In item I001 of the INFO menu, you can see the number of hours that have elapsed since the function was activated.

610. rpm

610. rpm

MIN
rpm confirm

The boiler works at the minimum power level. Check the analyser to ensure the min CO2 value complies
with the indication given in the table. If the value is different, calibrate the gas valve – see paragraph “5.23 Gas valve calibration”.

table 2

CO2 min

METHANE GAS (G20)

LPG (G31)

26C

9,0

10,0

%

30C

9,0

10,0

%

26

Make sure the flue gas temperature value, read in info I008 (see “5.34 INFO menu”), is coherent (with a tolerance ± 5°C) with the value measured by the analyser.
After completing the check: quit the function by pressing

650. rpm

exit function
reposition the previously removed components set the boiler to the required operating mode, depending on
the season regulate the heat request temperature values according to the
customer’s needs.
b When the combustion analysis function is active, all
heat requests are inhibited and the message “CO” appears on the display.
IMPORTANT The combustion analysis function is active for max. 15 minutes; the burner shuts down if a delivery temperature of 95°C is reached. It will ignite again when the temperature falls below 75°C.
b The combustion analysis function is usually carried out
with the 3-way valve on heating. The 3-way valve can be switched to DHW by generating a DHW request at the maximum output while the function itself is still active. In this case, the DHW temperature will be limited to a maximum value of 65°C. Wait for the burner to fire.

5.22 ADJUSTMENTS
The boiler has already been adjusted by the manufacturer. If the adjustments need to be made again however e.g. following extraordinary maintenance, after the replacement of the gas valve, after conversion from methane gas to LPG or vice versa, follow the procedures described below. The adjustment of the maximum and minimum output, maximum heating and slow ignition must be made in the sequence indicated, and by qualified personnel only: power up the boiler set the parameters
306 minimum fan speed
307 maximum fan speed
308 slow ignition
309 maximum fan speed for heating
313 ignition speed in restart

table 3

MAX. FAN RPM

METHANE GAS (G20)

LPG (G31)

26C: CH – DHW

7.000 – 8.700

6.900 – 8.500 rpm

30C: CH – DHW

6.900 – 8.300

6.800 – 7.900 rpm

MIN. FAN RPM

METHANE GAS (G20)

LPG (G31)

26C

1.500

2.050

rpm

30C

1.500

1.700

rpm

table 4

table 5

FAN RPM SLOW IGNITION

METHANE GAS (G20)

LPG (G31)

26C – 30C

5.500

5.500

rpm

value to be set for CO2 with the casing open = 8,8% value to be set for CO2 with the casing closed = 9,0% to adjust the CO2 value: rotate the max. power adjustment screw clockwise to redu-
ce the value, or anti-clockwise to increase it rotate the min. power adjustment screw clockwise to incre-
ase the value, or anti-clockwise to reduce it with the casing open and after adjusting the CO2 value at the
minimum power, check the adjustment of the CO2 at the ma-
ximum power again after completing the adjustments, replace the casing and
check the CO2 corresponds to the value shown in the table
1 and 2.

CO2 +
Minimum output adjustment screw

CO2 –
Maximum output
adjustment screw

5.24 RANGE RATED
This boiler can be adapted to the heating requirements of the system: power up the boiler set the parameter
310 Range rated
Set the heating value required (see chart) (rpm) and confirm.

MAX rpm

700. rpm

700. rpm

confirm
Record the new set value in the table on the back cover of this manual. For subsequent controls and adjustments, refer to the set value.
b The calibration does not entail the ignition of the boiler.
The boiler is supplied with the adjustments shown in the technical data table. Depending on requirements however, this value can be modified by referring to the graph below.

Fan rotation (r.p.m.)

Heat input curve – fan rotation

9500

9000

8500

8000

7500

7000

6500

6000

5500 5000

25C

4500

4000

3500

3000

2500

2000

1500

1000

500

0

30C

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32

Heat input (kW)

5.23 GAS VALVE CALIBRATION
Run the CO2 check procedure as explained in paragraph
“5.21 Combustion analysis”. If the values need to be modified,
proceed as follows: check the CO2 adjustment values with the casing closed remove the casing as explained in paragraph “4.6 CASING
REMOVAL” check the CO2 adjustment values again, with the casing open on the basis of the difference in values with the casing
closed and open, if necessary bring the CO2 to the value
shown in the table (1 and 2) – (minus) the difference found.
Example: CO2 value measured with the casing closed = 8,5% CO2 value measured with the casing open = 8,3%

5.25 FAULTS AND REPORTING
If there is a fault, an error code “Axx” is shown on the display. In certain cases, the error code is accompanied by an icon:

FAULTS

ICONS DISPLAYED

flame failure A10

all faults except flame failure and water pressure

water pressure

27

Reset function To reset boiler operation in the event of a fault, press:
A10 Res

2 sec
If the correct operating conditions have been restored, the boiler will start up again automatically. In the presence of a remote control, a maximum of 5 consecutive unlocking attempts are available. In this case, by pressing the boiler restores the initial attempts.
b If the attempts to reset the boiler do not work, contact
the Technical Assistance Centre. FAULT A41: if the pressure value falls below the 0.3 bar safety value, the boiler shows the fault code A41 for a transitory time of 10 min. If the fault still persists after this time, fault code A40 will appear.
A41 A40

Press to restore operation. After filling, run a venting cycle. If the pressure drop is very frequent, contact the Technical Assistance Centre.
Fault A60: indicates a fault on the DHW probe; notwithstanding this, the appliance will continue to provide hot water at approximately 50°C. The intervention of the Technical Assistance Centre is required.
Fault A91: the boiler has a self-diagnosis system that signals the need to clean the primary heat exchanger on the basis of the total number of hours in certain operating conditions (alarm code A91). Fault A91 occurs when the counter exceeds the value of 2500 hours; this value can be checked in the “5.34 INFO menu”, item I015 (visualization/100, example 2500h = 25). After cleaning (using the special kit supplied as an accessory), reset the total hours counter by bringing parameter 312 = 1. NOTE: The meter resetting procedure should be carried out after
each in-depth cleaning of the primary exchanger.
5.26 SAFETY STOP
If faults arise during ignition or operation, the boiler makes a “SAFETY STOP”. The display shows the error code in question. For the details, refer to “5.25 Faults and reporting”.
Reset function Contact the local Technical Assistance Centre if the reset attempts fail to reactivate normal operation.

With fault A40 on the boiler it is necessary to top-up the sy-
stem pressure in the following way: – open the filling valve slowly until you hear water entering the
system – close the filling valve, access the Info menu (“5.34 INFO
menu”, item I018) to check that the pressure value reaches
1-1.5 bar.

control valve

double check- valve

control valve

flow pipe

temporary connection

supply pipe

A10

Res

2 sec

ERROR CODE
A10
A11 A20 A30 A40 A41 A42 A60
A70
A80
A90 A91 A58 A59 CFS SFS FIL >3.0 bar
28

ERROR MESSAGE Flame lockout
Condensate drain obstructed Flue gas exhaust/air suction obstructed
Extraneous flame Limit thermostat
Fan fault
Fill the system
Fill the system
Pressure transducer fault
DHW probe fault
Flow sensor fault Flow sensor overtemperature Flow/return sensor differential
Return probe fault Return probe overtemperature Return-flow sensor differential
Flue gas probe fault
Clean primary heat exchanger Low power supply voltage High power supply voltage Call Service Stop for Service
Low pressure – check system
High pressure – check system

DESCRIPTION OF TYPE OF ALARM
definitive
transitional definitive definitive definitive transitional definitive transitional transitional definitive definitive
transitional definitive definitive transitional transitional transitional transitional
signal definitive
signal signal

5.27 KEYBOARD LOCK FUNCTION
To lock the keys

5.30 TEMPORARY SWITCH-OFF
In the event of temporary absences (weekends, short breaks, etc.) set the status of the boiler to OFF.

805. °C

Loc

2 sec

press again to unlock

If there is a fault, key 2 remains active to allow the alarm to be reset.

5.28 ALARM HISTORY
The alarm history is active with parameter 701=1 (SERVICE). Alarms can be viewed: – info menu (from I039 to I043), in chronological order, from
the oldest to the most recent, up to a maximum of 5. – on OT+ remote control, if connected. When an alarm occurs several times in a row, it is stored only once. To reset the alarm, follow the instructions provided in paragraph “5.26 Safety stop”.

A10 Res

2 sec
5.29 REPLACING THE BOARD
If the main PCB is replaced, it may be necessary to reprogram the configuration parameters. In this case, refer to the parameters table to see the board default values, the factory set values, and the personalised values. The parameters that must be checked and reset if necessary after replacing the board are: 301 – 302 (SERVICE) – 306 – 307 – 308 – 309 – 310 – 708.
b 708 (remember to set the paramter to 0).

AF1
—
AF2
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 tem-
perature measured by the flow sensor drops below 5°C. A heat request is generated in this phase, with burner ignition at the minimum output (then maintained until the delivery water temperature reaches 35°C); the display shows AF1 DHW anti-freeze: this function is activated if the temperature measured by the domestic hot water probe drops below 5°C. A heat request is generated in this phase, with burner ignition at the minimum output (then maintained until the delivery water temperature reaches 55°C); the display shows AF2 circulator anti-locking: The circulator activates every 24 hours of stop for 30 seconds.
5.31 SWITCHING OFF FOR LENGTHY PERIODS
If the boiler is not used for a long time, the following operations must be carried out: set the OFF status isolate the appliance from the electrical supply turn off the fuel and water taps of the heating and domestic
hot water system. In this case, the anti-freeze and anti-blocking systems are deactivated. Drain the heating and domestic water system if there is any risk of freezing.

29

5.32 PROGRAMMABLE PARAMETERS
A list of the programmable parameters is given below: USER (level always available) and INSTALLER (access with password 18); for a detailed explanation of the parameters, refer to paragraph “5.33 Parameters description”.

b Some information might not be available depending on
the access level, machine status or system configuration.

USER PARAMETERS
SETTINGS 004 MEASUREMENT UNIT

min 0

Value max
1

Password level
USER

Value set in the factory
0

Personalised values

INSTALLER PARAMETERS

CONFIGURATION

301 HYDRAULIC CONFIG.

306 MIN FAN SPEED

307 MAX FAN SPEED

308 SLOW IGNITION ADJUSTMENT

309 MAX CH FAN SPEED

310 RANGE RATED

311 AUX OUTPUT

312 FLUE GAS COUNTER RESET

313

IGNITION SPEED IN RESTART AFTER SHUTDOWN DUE TO TEMPERATURE

HEATING

405 SET PUMP 408 OT+ CASCADE

409 SCREED HEATER

410 HEATING OFF 411 RESET HEATING TIMES 415 MAIN LT ZONE
416 MAX TEMP (MAIN ZONE)
417 MIN TEMP (MAIN ZONE)
418 THERMOREGULATION (MAIN ZONE)
419 CURVE SLOPE (MAIN ZONE) 420 NIGHT-TIME COMP. (MAIN ZONE) 432 BUILDING TYPE 433 EXTERNAL PROBE REACTIVITY
DHW 508 MIN DHW TEMP. 509 MAX DHW TEMP. 511 SPEC. DHW FUNCTIONS HT. high temperature – LT: low temperature

Value

min

max

Password level

Value set in the factory

Personalised values

0 1.200 3.700 MIN MIN MIN 0 0
MIN FAN SPEED

4 3.600 9.999 MAX MAX MAX_CH 2 1 SLOW IGNITION ADJUSTMENT

INSTALLER INSTALLER INSTALLER INSTALLER INSTALLER INSTALLER INSTALLER INSTALLER
INSTALLER

2 * see technical data table see technical data table see technical data table see technical data table see technical data table
0 0
3.600 rpm

60

100

INSTALLER

NOT APPLICABLE ON THIS MODEL

INSTALLER

0

1

if boiler in OFF and LT

systems

0 min

20 min

INSTALLER

0

1

INSTALLER

0

1

INSTALLER

MIN TEMP (MAIN ZONE)

HT: 80.5 – LT: 45.0

INSTALLER

20
0
HT: 1.0 – LT: 0.2 0 5 min 0

MAX TEMP (MAIN ZONE)
1
HT: 3.0 – LT: 0.8 1 20 min 255

INSTALLER INSTALLER if ext. probe present
INSTALLER
only if 418 = 1

85
0
3 min 0 0
HT: 80.5 – LT: 45.0 HT: 40 – LT: 20 0 HT 2.0 – LT 0.4 0 5 min 20

37,5 °C 49,0 °C 0

49,0 °C 60,0 °C 5

INSTALLER INSTALLER INSTALLER

37,5°C 60,0°C
0

SERVICE PARAMETERS
CONFIGURATION 302 PRESSURE TRANSD. TYPE 303 ENABLE FILLING 304 PRESSUREATSTARTOF FILLING 305 VENTING CYCLE
HEATING 401 HIGH TEMP HYSTERESIS OFF 402 HIGH TEMP HYSTERESIS ON 403 LOW TEMP HYSTERESIS OFF 404 LOW TEMP HYSTERESIS ON
DHW 510 DHW DELAY 512 DHW POST-CIRC. ON HEATING RETURN 513 RETURN POST-CIRC TIME
TECHNICAL
701 ALARM HISTORY ACTIVATION
706 SERVICE CALL FUNCTION 707 SERVICE DEADLINE 708 HIGH EFFICIENCY MODE
CONNECTIVITY 801 BUS 485 CONFIG. 803 OT+ CONFIG.

Value

min

max

0

1

0

1

NOT AVAILABLE ON THIS MODEL

0

1

2

10

2

10

2

10

2

10

0 sec

60 sec

0

1

1

255

0

1

0

2

0

255

0

1

NOT AVAILABLE ON THIS MODEL

0

1

Password level
SERVICE SERVICE
SERVICE
SERVICE SERVICE SERVICE SERVICE
SERVICE SERVICE SERVICE
SERVICE
SERVICE SERVICE SERVICE
SERVICE

Value set in the factory
1 0
1
5 5 3 3
0 sec 0 6
0 (the value automatically changes to 1 after 2 hours of
operation) 2 52 0
1

*301: 0 = HEATING ONLY – 1 = INSTANTANEOUS FLOW SWITCH – 2 = INSTANTANEOUS FLOW METER – 3 = STORAGE TANK WITH PROBE 4 = STORAGE TANK WITH THERMOSTAT

Personalised values

30

5.33 PARAMETERS DESCRIPTION
Some of the following functions may not be available depending on the machine type and access level.

PARAMETER DESCRIPTION

004

To alter the measurement unit: 0 = METRIC measurement units / 1 = IMPERIAL measurement units. The figures are expressed in decimal format (one figure) for values between -9°C and +99°C, and in whole number format for values -10°C and 100°C. The visualisation in °F (Fahrenheit) is always expressed in whole number format.

To set the type of hydraulic configuration for the boiler: 0 = HEATING ONLY – 1 = INSTANTANEOUS FLOW SWITCH – 2 = INSTANTANEOUS FLOW METER –

301 3 = STORAGE TANK WITH PROBE – 4 = STORAGE TANK WITH THERMOSTAT

Factory value = 2 (do not alter). If the electronic board is replaced, make sure this parameter is set at 2

302

To set the type of water pressure transducer: 0 = water pressure switch – 1 = pressure transducer Factory value = 1 (do not alter). If the electronic board is replaced, make sure this parameter is set at 1.

303

To enable the “semi-automatic filling” function when a pressure transducer and filling solenoid valve are installed in the boiler. Factory value = 0 (do not alter). If the electronic board is replaced, make sure this parameter is set at 0.

304 Only appears if 303 = 1 NOT AVAILABLE ON THIS MODEL.

305 To disable the vent cycle function. Factory value = 1. Set the parameter at 0 to disable the function.

306 To alter the minimum number of fan rotations.

307 To alter the maximum number of fan rotations.

308 To regulate slow ignition (it can be programmed within the range 306 – 307).

309 To alter the maximum fan rpm in heating mode (it can be programmed within the range 306 – 307).

310

To modify the heat output in heating mode. Factory value = 309, but it can be programmed within the range 306 – 309. For more details about the use of this parameter, refer to paragraph “5.24 Range rated”.

To configure the operation of a supplementary relay (only if board BE09 (accessory kit) is installed) in order to bring a phase (230V AC) to a second heating pump

(supplementary pump) or to a zone valve. Factory value = 0, but it can be programmed within the range 0 – 2 with the following meaning:

311 311= 0 – control depends on the configuration of the wiring of the BE09 board (jumper cut: supplementary pump – jumper present: zone valve)

311= 1 – control of the zone valve

311= 2 – control of the supplementary pump

Used to reset the operating hours counter in certain conditions (for more details, see “5.25 Faults and reporting”, fault A91).

312 Factory value = 0. Bring the value to 1 to reset the flue gas probe hour counter after the cleaning of the primary heat exchanger.

When the reset procedure has been completed, the parameter will return automatically to 0.

313

This parameter allows the regulation of slow ignition in burner re-ignitions following shutdowns due to the set point temperature being reached. Adjustment is possible between the minimum fan speed value (306) and the speed value during slow ignition (308)

401

For high temperature systems, this parameter allows the setting of the hysteresis value used by the adjustment board to calculate the delivery temperature for burner switch-off: SWITCH-OFF TEMPERATURE = HEATING SETPOINT + 401. Factory value = 5°C, but it can be set within the range 2 – 10°C.

402

For high temperature systems, this parameter allows the setting of the hysteresis value used by the adjustment board to calculate the delivery temperature for burner ignition: IGNITION TEMPERATURE = HEATING SETPOINT – 402. Factory value = 5°C, but it can be set within the range 2 – 10°C.

For low temperature systems, this parameter allows the setting of the hysteresis value used by the adjustment board to calculate the delivery temperature for burner

403 switch-off: SWITCH-OFF TEMPERATURE = HEATING SETPOINT + 403.

Factory value = 3°C, but it can be set within the range 2 – 10°C.

For low temperature systems, this parameter allows the setting of the hysteresis value used by the adjustment board to calculate the delivery temperature for burner

404 ignition: IGNITION TEMPERATURE = HEATING SETPOINT – 404.

Factory value = 3°C, but it can be set within the range 2 – 10°C.

405

The pump speed is PROPORTIONAL to that of the fan and in DHW it is always at max. The parameter can be set in the range 60-100: 100 = no modulation – 60 = max modulation – 85 = default value.

408 Used to set the boiler for cascade applications via an OT+ signal. Not applicable with this boiler model.

Used to activate the screed heater function (for more details, refer to paragraph “5.20 Screed heater function”).

409 Factory value = 0, with the boiler OFF. Set the value at 1 to activate the screed heater function on the low temperature heating areas.

The parameter returns automatically to 0 when the screed heater function ends, but the function can also be interrupted by manually setting the value at 0.

410

Used to modify the forced heating off timer with regards the delay time for re-igniting the burner if it is OFF because the heating temperature has been reached. Factory value = 3 minutes, but it can be set at a value between 0 and 20 min.

411

Used to annul the HEAT TIME RESET function and REDUCED MAX. HEATING OUTPUT TIMER, during which the fan speed is limited to a range between the minimum and 60% of the max. heating output set, with a 10% increase every 15 minutes. Factory value = 0. Set at 1 to reset the timer.

Used to specify the type of area to be heated. Choose from the following options:

415 0 = HIGH TEMPERATURE (factory setting)

1 = LOW TEMPERATURE

Used to specify the maximum heating setpoint value that can be set:

416

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 value of 416 cannot be lower than 417.

This parameter is used to specify the minimum heating setpoint value that can be set:

417

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 value of 417 cannot be higher than 416.

Used to activate temperature control when the system is connected to an outdoor temperature sensor.

418

Factory value = 0 (the boiler always works with a fixed point). If the parameter is set at 1 and an outdoor temperature sensor is connected, the boiler works in temperature control mode. If the outdoor temperature sensor is disconnected, the boiler always works with a fixed point.

See paragraph “5.16 Setting the thermoregulation” for more details about this function.

Used to set the number of the compensation bend used by the boiler in temperature control mode. Factory value = 2.0 for high temperature systems, and 0.5 for low

419 temperature systems. The parameter can be programmed within the range 1.0 – 3.0 for high temperature systems, or 0.2 – 0.8 for low temperature systems. See para-

graph “5.16 Setting the thermoregulation” for more details about this function.

420

Activates the “night-time compensation” function. The default value is 0. Set at 1 to activate the function. See paragraph “5.16 Setting the thermoregulation” for more details about this function.

31

432 433 501-507 508 509 510 511 512 513 701
706
707 708 801
803

Frequency with which the value of the calculated outdoor temperature for thermoregulation is updated, a low value for this value will be used for buildings that have little insulation. Frequency for the reading of the outdoor temperature value by the probe.
Functions linked to the availability of a storage tank. NOT AVAILABLE ON THIS MODEL
To set the minimum DHW setpoint To set the maximum DHW setpoint Only visible when parameter 511= 2 or 5. A delay – in seconds – is imposed on pump and fan activation when there is a DHW request. Enabling of special DHW functions: 0 = no function 1 = NOT USED 2 = NOT USED 3 = absolute DHW thermostats 4 = smart anti-oscillation DHW function 5 = all the previous functions active This value can be used to enable/disable the DHW post-circulation function with inhibition of heating start-up. This value sets the duration of the DHW post- circulation when the DHW post-circulation function with inhibition of heating start-up is enabled. Used to activate the storage of an alarm history. Default 0; the value automatically changes to 1 after 2 hours of operation This parameter allows periodic control of the boiler according to an operating period set in parameter 707. There are three setting values:
0 = function disabled
1 = function enabled according to the following rule: if 707 <4 the display shows the CFS signal if 707 = 0 the display shows the SFS (STOP FOR SERVICE) signal which indicates the permanent inhibition of all requests for heating and domestic hot water. Not resettable
2 = function enabled: when 707 = 0 the display shows the CFS signal without any stop of operation In this condition, the INFO menu (line I044) displays the number of days that have passed since the CFS signal appeared (707 = 0)
b The CFS signal occurs at 10 min intervals for the duration of 1 min, 1 month before the end of the period set in parameter 707.
Fixed operating period for the service call (parameter 706).
Automatic function that is activated at the first power supply or after 60 days of non-use (electrically powered boiler). In this mode the boiler, for 60 minutes, limits the heating power to a minimum and the maximum DHW temperature to 55°C. Activating the chimney sweep temporarily disables this function. During execution, the water pressure icon flashes. 0 = FACTORY VALUE, high efficiency mode disabled. FUNCTION NOT AVAILABLE ON THIS MODEL
This parameter is used to enable the remote control of the boiler via an OpenTherm device: 0 = OT+ function disabled (remote boiler control via an OT+ device is not possible). If this parameter is set at 0, the OT+ connection (if present) will be immediately
interrupted 1 = FACTORY VALUE. OT+ function enabled (an OT+ device can be connected for remote boiler control). When an OT+ device is connected to the boiler, the message
“Ot” appears on the display.

5.34 INFO MENU
i0I02
access to info menu

i0I04
choise info

i0I05
or

3 01

b The

interface

automatically quits

the INFO menu if

no key is pressed

for 60 sec

access to parameter value back to the previous level

PARAMETER NAME

I001

Screed heater hours

I002

Delivery probe

I003

Return probe

I004

Domestic hot water probe

I005

OT+ DHW setpoint

I008

Flue gas probe

I009

External probe

I010

External temperature for thermoregulation

I011

DHW flow rate

I012

Fan rotations

I015

Flue gas probe counter

I016

Delivery setpoint (main zone)

I017

OT+ CH setpoint

I018

System pressure

I028

Ionization current

I029

High efficiency mode

I032

DHW Comfort

I033

DHW special functions

I034

ID board

I035

FW board revision

I038

WIFI pendrive radio signal

I039

Alarm history 1 (the oldest)

I040

Alarm history 2

I041

Alarm history 3

I042

Alarm history 4

I043

Alarm history 5 (the latest)

I044

Reporting number of days for CFS

DESCRIPTION Number of hours of screed heater function activation Boiler delivery probe value Boiler return probe value DHW probe value with boiler in instantaneous mode DHW setpoint sent by OT+ remote control to the boiler Flue gas probe value Instantaneous external probe value
Filtered external probe value used in the temperature control algorithm to calculate the heating setpoint
DHW setpoint (only with OT+ connection) Number of fan rotations (rpm) Number of operating hours of the heat exchanger in “condensing mode” (values in thousands are displayed/100) Delivery setpoint for the main zone CH setpoint sent by OT+ remote control to the boiler The system pressure level Instantaneous ionization current detected by the detection electrode Indicates when the high efficiency mode is running DHW Comfort mode Special functions active for high DHW inlet temperatures Identification of the electronic board Firmware revision on the electronic board Not available
List of the last five alarms recorded
Number of days that have passed since the CFS signal appeared (707 = 0)

32

5.35 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 TIGHTNESS.
· 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.
5.36 INSTRUCTING THE USER
Hand over all documentation supplied with this appliance ­ including these instructions ­ and explain the importance of keeping them in a safe place. Explain to the user how to isolate the appliance from the gas, water and electricity supplies and the locations of all drain points. Show the user how to operate the appliance and any associated controls correctly. Show the user the location of the filling valve and how to topup the system pressure correctly and show the location of all manual air release points. Explain to the user how to turn off the appliance for both long and short periods and advise on the necessary precautions to prevent frost damage. Explain to the user that for continued safe and efficient operation, the appliance must be serviced annually by a competent person.
IMPORTANT To validate the appliance warranty, it’s necessary to register the appliance details with us. The warranty can be registered in several ways: · online at: www.vokera.co.uk (UK) or www.vokera.ie (Ireland) · UK residents can also register by calling: 0800 479 0751.
5.37 MAINTENANCE
Cleaning the primary heat exchanger Isolate the appliance from the gas & electrical supply. Remove the casing as explained in paragraph “4.6 CA-
SING REMOVAL”. Disconnect the connecting cable of the electrode. Disconnect the power cables of the fan. Take out the clip of the fixing pipe (A) from the mixer. Loosen the nut of the gas train (B). Rotate and take out the gas pipe from the mixer. Remove the 4 nuts (C) that fix the combustion unit. Take out the air/gas conveyor assembly including the fan
and mixer, being careful not to damage the insulating panel and the electrode. Remove the siphon connecting pipe from the condensate drain fitting of the heat exchanger and connect a temporary collecting pipe. At this point proceed with the heat exchanger cleaning operations. Vacuum out any dirt residue inside the heat exchanger, being careful NOT to damage the retarder insulating panel. Clean the coils of the heat exchanger with a soft bristled brush.
b DO NOT USE METAL BRUSHES THAT COULD
DAMAGE THE COMPONENTS.
Clean the spaces between the coils using a 0.4 mm thick blade (also available in a kit).
Vacuum away any residue produced by the cleaning. Rinse with water, being careful NOT to damage the retarder
insulation panel.

b In case of stubborn deposits of combustion products on
the surface of the exchanger, clean by spraying natural white vinegar, taking care NOT to damage the retarder insulation panel.
Leave for a few minutes. Clean the coils of the exchanger with a soft bristle brush.
b DO NOT USE METALLIC BRUSHES WHICH CAN
DAMAGE THE COMPONENTS.
Rinse with water, taking care NOT to damage the retarder insulation panel.
Make sure the retarder insulation panel is undamaged and replace it if necessary following the relative procedure.
Once the cleaning operations are finished, carefully reassemble all the components, following the above instructions in the reverse order.
To close the fixing nuts of the air/gas conveyor assembly, use a tightening torque of 6 Nm following the sequence indicated on the diecast (1,2,3,4).
Restore the gas and electrical supply to the appliance.
Cleaning the burner: Isolate the appliance from the gas & electrical supply. Remove the casing as explained in paragraph “4.6 CASING
REMOVAL”. Disconnect the connecting cable of the electrode. Disconnect the power cables of the fan. Take out the clip of the fixing pipe (A) from the mixer. Loosen the nut of the gas train (B). Rotate and take out the gas pipe from the mixer. Remove the 4 nuts (C) that fix the combustion unit. Take out the air/gas conveyor assembly including the fan and
mixer, being careful not to damage the ceramic insulation panel and the electrode. At this point proceed with the burner cleaning operations. Clean the burner with a soft bristled brush, being careful not to damage the insulation panel and the electrode.
b 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 finished, carefully reassemble all the components, following the above instructions in the reverse order.
To close the fixing nuts of the air/gas conveyor assembly, use a tightening torque of 6 Nm.
Restore the gas and electrical supply to the appliance.

33

Replacing the burner insulating panel Unscrew the ignition/detection electrode fixing screws and
remove it. Remove the burner insulating panel (D) by inserting a blade
underneath the surface (as shown in the figure). Remove any fixing glue residue. Replace the insulating panel. The new insulating panel does not need to be fixed in place
with glue as its geometry ensures perfect coupling with the heat exchanger flange. Reassemble the ignition/detection electrode using the previously removed screws and replacing the relative seal.
D

C

B

A

Cleaning the siphon Disconnect the tubes (A) and (B), remove the clip (C) and remove
the siphon. Unscrew the bottom and the top caps, then remove the float. Clean the parts of the siphon from any solid residues.
b Do not remove the float and its sealing gasket as their pres-
ence is intended to prevent the escape of burnt gases into
b the environment in the event of no condensation. Once the operations have been completed, reassemble the components by operating in the reverse order to what is described, checking the floating seal and replace it if necessary. If replacing the float gasket, make sure it is correctly
b positioned in its seat (see figure in section). At the end of the cleaning sequence, fill the siphon with water (see “5.7 FIRST COMMISSIONING”) before restarting
b the boiler. At the end of the siphon maintenance operations, it is recommended to bring the boiler to condensing mode for a few minutes and to check for leaks from the entire condensate evacuation line.

A B

C

34

6 SECTION – SERVICING INSTRUCTIONS

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 efficient operation of the appliance, it is recommended that it is checked and serviced at regular intervals. To ensure correct and safe operation of the appliance, it is essential that any worn or failed component be replaced only with a genuine Vokèra spare part. It should be remembered that although certain generic components may look similar, they will be specific to an individual appliance or product range. Use of non- genuine 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 sufficient. 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 qualified personnel. The following instructions apply to the appliance and its controls, but it should be remembered that the central heating and the domestic hot water systems would also require attention from time to time.
ROUTINE ANNUAL MAINTENANCE
The appliance incorporates many state-of-the-art’ components that are either solid-state’ or are regarded as non-serviceable’ items. As a consequence, the requirements for routine annual maintenance are focussed upon: 1. ensuring that the appliance and flue system are in a safe condition 2. ensuring that the appliance is operating safely 3. ensuring that the appliance is performing to its design specification. When the appliance has been installed to within the minimum stated clearances; the appliance layout is such that it enables routine annual maintenance to be carried out entirely from the front of the appliance. NOTE Any noticeable defect or deterioration on or within the appliance and flue system that impacts or affects the above requirements; will warrant further diagnosis and repair, which may result in the replacement of components. Specific advice and instruction on the removal and replacement of component parts of the appliance can be found online using the adjacent QR code or by visiting our website. ROUTINE ANNUAL MAINTENANCE REQUIREMENTS 1\. Check the operation of the appliance in both the heating and hot water modes and ensure the performance is in line with the appliance specification. 2\. Using the UI menu, navigate to the alarms history and check for any recent alarm events (see “5.28 Alarm history”). Refer to the alarm/fault codes description chart for further information (see “5.25 Faults and reporting”. 3\. Remove the front cover (see “4.6 CASING REMOVAL”) and visually inspect the internal components and electrical wiring for any defect or deterioration. 4\. Visually check for any dirt or debris within the condensate trap (the trap is translucent and can be checked visually). 5\. Replace the front cover as detailed in section “4.6 CASING REMOVAL” taking notice of the importance of ensuring that the effectiveness of the ­ front cover ­ seals are not compromised. 6\. Carry out a combustion analysis as detailed in “5.34 INFO menu”. 7\. Visually check the entire flue system for any damage, defect, or deterioration. NOTE In order to access thealarms history’ it is necessary to access the password protected settings. Refer to “5.9 Setting password, access and parameter modification” for further details.

UNSCHEDULED MAINTENANCE The appliance incorporates software that monitors the operating conditions of the appliance, and will record any unusual usage conditions’ that will affect the requirement to remove and clean the burner/heat exchanger assembly. When theunusual usage’ hours reach a pre- determined threshold, the appliance will signal ­ via alarm code E091 ­ that the heat exchanger requires to be cleaned.
REPLACEMENT OF COMPONENTS
Although it is anticipated that this appliance will provide years of trouble- free service and outstanding performance; the lifespan of any component will be determined by factors such as operating conditions and usage levels. Should the appliance develop a fault, the fault-finding section of this manual will greatly assist in determining the cause; however further advice can be sought from the Vokera Technical Help-line. Remember always to use only genuine Vokera spare parts.
COMPONENT REMOVAL PROCEDURE
To remove/replace a component, access to the interior of the appliance is usually essential. Always isolate the appliance from the electrical supply ­ and if necessary remove the fuse. · Close all service valves if any hydraulic and/or gas carrying
item is to be removed. · Remove the front cover ­ and where possible or convenient
­ the side panels of the appliance as detailed in “4.6 CASING REMOVAL”. · If required, drain the primary circuit via the drain valve (located adjacent to the diverter valve) using the tubing supplied with the appliance. · If required, drain the secondary circuit via the available DHW outlets.
NOTE When removing a hydraulic component, ensure that some water absorbent cloths are available to catch any residual water that may drip from the appliance and/or the removed component.
When the appliance has been installed to within the stated minimum clearances; it may be necessary to remove adjacent components in order to facilitate access to a specific component.
Carry out the relevant elements of the commissioning procedure after replacing a component.
ALWAYS TEST FOR GAS TIGHTNESS IF ANY GAS CARRYING COMPONENT HAS BEEN DISTURBED, REMOVED, OR REPLACED.
WHEN REPLACING THE SIDE PANELS AND/OR THE FRONT COVER, ENSURE THE ROOM SEALED INTEGRITY OF THE APPLIANCE HAS NOT BEEN COMPROMISED ­ REFER TO “4.6 CASING REMOVAL”.
To obtain detailed specific information and instructions on how to remove and replace specific components, please access our online resources using the below QR code or by logging on to our website.
www.vokera.co.uk www.vokera.ie

35

7 WIRING DIAGRAMS
NOTE Please refer to 3 – 3E and use the appropriate PPE when ca

References

• Home — Benchmark
• Installers First
• Welcome — Heating and Hotwater Industry Council
• Vokera|Vokèra by Riello
• Vokera|Vokèra by Riello

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