Riello Vokera unica max series User manual

Users Instructions

Installation &

Servicing

Instructions

THESE INSTRUCTIONS

TO BE RETAINED

BY USER

Vokèra is a licensed member of the Benchmark scheme

which aims to improve the standards of installation and

commissioning of domestic hot water systems in the UK.

UNICA MAX

High efciency combi boiler

UNICA MAX 35C NG G.C. N° 47-364-61

UNICA MAX 40C NG G.C. N° 47-364-62

UNICA MAX 35C LPG G.C. N° 47-364-63

UNICA MAX 40C LPG G.C. N° 47-364-64

1. THINGS YOU SHOULD KNOW...................................................2

2. GETTING STARTED....................................................................5

3. HOW TO.....................................................................................10

4. WHAT IF..................................................................................... 11

SECTION 1 - DESIGN PRINCIPLES AND OPERATING

SEQUENCE ...................................................................................12

SECTION 2 - TECHNICAL DATA ..................................................13

SECTION 3 - CONTROL PANEL (REC10CH)............................... 17

SECTION 4 - GENERAL REQUIREMENTS (UK) .........................24

SECTION 4A - GENERAL REQUIREMENTS (EIRE)....................26

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 tted.

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 0754 (UK) or 056

7755055 to obtain your warranty conrmation 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 UNICA 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 tted. 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 UNICA

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.

USERS INSTRUCTIONS

INTRODUCTION

Dear Customer

Your Vokèra UNICA 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 efciency. Please therefore take some time to read these instructions carefully.

Do’s and Don’t’s

- Do ensure that the system pressure is periodically checked

- Do ensure that the boiler is not 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.

1. THINGS YOU SHOULD KNOW

This booklet is an integral part of the appliance. It is therefore necessary to ensure that the booklet is handed to the person responsible

for the property in which the appliance is located/installed. A replacement copy can be obtained from Vokèra customer services.

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.

SECTION 5 - INSTALLATION .......................................................27

SECTION 6 - COMMISSIONING ................................................... 33

SECTION 7 - SERVICING INSTRUCTIONS..................................43

SECTION 8 - CHECKS, ADJUSTMENTS AND FAULT FINDING .... 44

SECTION 9 - LPG INSTRUCTIONS..............................................48

Commissioning checklist ............................................................49

Benchmark...............................................................................50-53

Vokèra Warranty Terms and Conditions................................54-55

1.6 DIMENSIONS

HEIGHT WIDTH DEPTH

35C-40C 740 mm 470 mm 350 mm

1.7 CLEARANCES REQUIRED

* 25mm above ue bend

if top ue outlet is used.

Consideration should

be given to providing

reasonable clearance

for the insertion of a FGA

probe.

** Disconnection of

adjacent components

may be required in

order to facilitate syphon

removal.

*** Provided that a door or

removal panel enables

450mm access for

maintenance.

^ Can be reduced to

5mm if a removal panel

enables 100mm for

maintenance.

100

ABOVE 25mm*

BELOW 100mm^

LEFT SIDE 2mm

RIGHT SIDE 2mm**

FRONT 4mm***

1.8 FROST PROTECTION SYSTEM

The UNICAMAX 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 within the appliance drop below 5 °C. 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 protectionsystem is relianton the appliancehaving

a permanent electrical supply, and being in a non-fault condition.

Depending on the type of application, some of the functions described in this manual might not be available.

The REC10CH UI is a multi-functional control that enables you to view the operating status of your appliance at a glance; is also used to adjust/

set the various ‘User’ settings, including temperature set-points and it also allows the management of functions related to the solar system and

the heat pump (if present). The REC10CH UI also incorporates an embedded timer that - if enabled - can be used to program and control the

ON/OFF times for your central heating. Please consult you installer for further advice on this function.

The REC10CH UI features a backlit liquid crystal display.

1.10 CONTROL PANEL (REC10CH)

REC10CH

Boiler control panel

Key area

Confirm

back= ret

urn to the previous screen

cancel selection

return to the main screen (press > 2 sec.)

- From the main screen they allow you to choose between the

options: MENU, INFO, SET, STATE, PLANT.

- From the sub-menus they allow you to navigate through the

different options

Note:

The temperature of the hot water sensor is shown at the centre of the main screen. The value’s meaning is indicated at the bottom of the display.

Whenever a heating request is in progress, the value displayed at the centre of the screen refers to the ow sensor of the source active at that

moment (boiler or heat pump, if installed), with the relative indication.

The value expressed in bar refers to the system’s water pressure.

The top of the screen shows the current date and time, as well as the outdoor temperature, if available.

System Icons may appear on both the left and right of the display; and they signify the following condition/status:

1.9 APPLIANCE STATUS INDICATORS

Your appliance incorporates the REC10CH UI (User Interface),

that displays information on appliance status and condition.

g. 1

This icon indicates that the OFF operating status mode has been set. Each ignition request is ignored except for the frost-protection

function. The pump anti-lock, 3-way valve and frost-protection function remain active.

This icon indicates that WINTER mode has been selected (HEATING function enabled). If a heating request from the main zone is in

progress, the icon will be flashing.

If there is a CH request from the additional zone, the number 1 or 2 is flashing.

Only if heat pump is present. This icon indicates that cooling is active in the SUMMER state. If a cooling request from the main

zone is in progress, the icon is flashing. If a cooling request from the additional zone is in progress, number 1 is flashing.

This icon indicates that the circuit for domestic hot water production is enabled. When a domestic hot water request is in progress, the

icon flashes. The “P” at the top of the domestic hot water icon indicates that the boiler preheating function is enabled; the “P” when

flashing indicates that a preheating request is in progress.

When the “central heating programming timing” is enabled this icon indicates that the system heating (main zone) is in AUTOMATIC

mode (the management of the heating requests follows what has been set with the timer).

If the heating function is not enabled during the current time frame, the icon will be crossed out.

When the “central heating programming timing” function is enabled this icon indicates that the system heating (main zone) is in MANUAL

mode (the management of the heating requests does not follow what has been set with the programming timing, but it is always active).

OFF This icon indicates that the main zone, when the “

central heating programming timing

” function is not enabled, has been set to off

(not active).

Only if heat pump is present. This icon indicates that the management of a heat pump is enabled. When the heat pump is

running, then the icon is flashing.

Only if solar system is present. This icon indicates that the management of a solar system is enabled. When the solar system

circulator is running, then the icon is flashing.

This icon indicates that the system is detecting the presence of a flame.

This icon indicates the presence of an anomaly or fault condition, and is always flashing.

Only with combined boiler and presence of boiler + heat pump enabled for domestic hot water. The icon appears crossed

out with an “X” when the system works outside the activation times of the heat pump in the domestic hot water, while it flashes

when the heat pump is in operation to load the boiler.

Only if photovoltaic enabled. When the icon is flashing, it means that the electrical productivity of the photovoltaic system is

adequate (closed contact). The system exploits the available energy.

FRI

18/05/2021 12:17

INFO SET

PLANT

HOT WATER TEMPERATURE

STATE

42°C P

1.3

bar

1.11 USER FUNCTIONS

FRI

18/05/2021 12:17

INFO SET

PLANT

HOT WATER TEMPERATURE

STATE

42°C P

1.3

bar

2 STATE

DEFAULT VALUE FACTORY

SET

MINIMUM

VALUE

MAXIMUM

VALUE

ACCESS LEVEL

NOTES

STATE

BOILER OFF OFF/SUMMER/WINTER USER

DHW AUTO AUTO/MANUAL

USER

ANTILEGIO CUT OFF USER

with boiler in OFF and

ANTILEGIO active

MAIN ZONE AUTO ON/OFF (if POR=0)

USER

ON ON/OFF (if POR=1)

HEAT PUMP

ENABLE/DISABLE NIGHT REDUCT FUNCTION NOT ACTIVE FUNCTION ACTIVE FUNCTION NOT ACTIVE USER

NIGHT MODE START TIME 20:00 00:00 23:59 USER

only if NIGHT REDUCTION active

NIGHT MODE STOP TIME 20:00 00:00 23:59 USER

only if NIGHT REDUCTION active

1 MENU

DEFAULT VALUE FACTORY

SET

MINIMUM

VALUE

MAXIMUM

VALUE

ACCESS LEVEL

NOTES

SETTINGS USER

TIME & DATE USER

DAYLIGHT SAVINGS TIME FUNCTION ACTIVE FUNCTION NOT ACTIVE FUNCTION ACTIVE USER

LANGUAGE ITALIANO / ENGLISH / ... USER

BACKLIGHT 5 min 1 min 15 min USER

TIME SCHEDULE USER

MAIN USER: only if POR = 1

ZONE 1 USER: only if POR = 1 and zone

added

ZONE 2 USER: only if POR = 1 and zone

added

HP DHW USER: only if HP present and

enable for DHW

3 SET

DEFAULT VALUE FACTORY

SET

MINIMUM

VALUE

MAXIMUM

VALUE

ACCESS LEVEL

NOTES

SET

HEATING

DHW

COOLING

18 °C 4 °C 20 °C if you work at a

ﬁ xed point USER

only if HP enable

for cooling

0 -5 -6 if you work with

climatic curves

WATER TANK SETPOINT 60 °C 37,5 °C 60 °C USER

PRE-HEATING 0 0 2 USER

4 INFO

See speciﬁ c paragraph

2. GETTING STARTED

2.1 BEFORE SWITCHING ON

fore 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 APPLIANCE CONTROLS (see fig. 1)

The appliance controls are concealed behind the front ap of

the appliance.

NOTE: the appliance frost protection is active in all the boiler

modes.

The control panel functions can be used to vary the temperature

of the water that circulates around your radiators and the water

that ows from your hot water taps. The heating temperature

range can be adjusted between 20C - 40C (low temperature) or

40C - 80C (high temperature) this range is congured by your

installer and the default is the high temperature range. The hot

water temperature range can be adjusted between 37C - 60C.

Please Note: the actual delivery temperature is also conditional

upon the incoming water temperature and the actual ow-rate

at the outlet.

Refer to the main appliance status table for fault indicator and

boiler status.

2.3 LIGHTING THE BOILER

Ensure the gas and electrical supply to the boiler are

turned on. After completing all operations required to prepare

commissioning, proceed as follows to start the boiler.

2.4 START SCREEN

When the appliance is first connected to the electrical supply,

the REC10CH may require you to set the time and date (see

“2.9 MENU”), and the appliance will enter its ‘pre-purge’

mode that will last for several minutes. On completion of the

‘pre-purge’ phase, the appliance will enter its ‘standby’ mode

unless a heating or HW request has been made. By pressing

the “up” and “down” keys it is possible to move the selection

of the functions in this order: PLANT - STATE - SET - INFO

- MENU.

By pressing the “ok” key you can access the settings of the

selected function (except for PLANT).

The “back” key is inactive (except for PLANT).

The highlighted status is that which is currently selected.

18/05/2013 12:17

INFO SET

42°C

1.3

bar

FRI PLANT

HOT WATER TEMPERATURE

STATE

2.5 PLANT

The PLANT menu only becomes available if additional zones

have been added and congured with this system via the

REC10CH.

In order to change zones (see above), highlight PLANT

if necessary pressing the “up” and “down” keys. Then,

pressing the “ok” and “back” keys, it will be possible to

select the other zones in this sequence (only if added and

congured with the REC10CH): PLANT - MAIN ZONE - ZONE

1 - ZONE 2.

The TIME&DATE, DAYLIGHT SAVINGS TIME, LANGUAGE

and BACKLIGHT settings are related to the appliance only.

The information contained in the INFO menu is related to the

appliance. No domestic hot water parameters can be set if

MAIN, ZONE 1 or ZONE 2 is selected.

2.6 STATE

This function can be used to set these operating modes.

Select STATE BOILER or MAIN ZONE or HEAT PUMP

(if present).

BOILER

MAIN ZONE

STATE

HEAT PUMP

Note: MAIN ZONE is visible in this menu only if the zone is managed

by a room thermostat.

HEAT PUMP is only visible if a heat pump is connected to the system.

BOILER

This function can be selected in order to set the boiler’s status:

Select STATE BOILER OFF or HOT WATER ONLY

(SUMMER) or HEATING AND HOT WATER (WINTER).

Once the selection has been validated, the display returns to

the

STATE

screen.

OFF

HOT WATER ONLY

HEATING AND HOT WATER

BOILER

OFF: if OFF is selected, the system enters the standby mode,

whereby only the standby functions remain active.

SUMMER: if HOT WATER ONLY is selected, the system

produces domestic hot water. Heating is disabled.

WINTER: if HEATING AND HOT WATER is selected, the

system produces domestic hot water and activates the heating

function.

MAIN ZONE

Select STATE MAIN ZONE

to set the main zone’s status,

by choosing one of the following options:

- if the embedded time clock is disabled (default):

- ZONE ON: boiler responds to heating request

- ZONE OFF: boiler does not respond to any request for

heating

- if the embedded time clock has been enabled:

- AUTO/MANUAL/HEAT OFF.

ZONE ON

MAIN

ZONE OFF

AUTO

MANUAL

MAIN

HEAT OFF

Once the selection has been validated, the display returns to

the STATE screen.

ZONE ON: if ZONE ON is selected, the zone heating requests

are met.

AUTO: if AUTO is selected, the zone heating requests will be

managed based on the scheduled programme.

MANUAL: if MANUAL is selected, the zone requests will be

managed based on the selection set by the user.

HEAT OFF: If HEAT OFF is selected, the zone heating

requests will be ignored.

NOTE: to deactivate the zone in SUMMER or in WINTER, you

must select the required season (SUMMER or WINTER in the

BOILER menu) and set the zone concerned to OFF.

HEAT PUMP (if present)

By selecting HEAT PUMP it is possible to enable the NIGHT

REDUCTION. This parameter is used to reduce the noise of

the heat pump by limiting the maximum operating frequency

of the compressor in the time band set by the parameters

NIGHT MODE START TIME and NIGHT MODE STOP TIME.

NIGHT MODE START TIME (if NIGHT REDUCTION is active)

This parameter is used to set the start time of the heat pump

compressor frequency limitation band when the night reduc-

tion function is enabled. Range 00:00 - 23:30/Default 22:00.

NIGHT MODE STOP TIME (if NIGHT REDUCTION is active)

This parameter is used to set the end time of the heat pump

compressor frequency limitation band when the night reduc-

tion function is enabled. Range 00:00 - 23:30.

ENABLE NIGHT REDUCT

HEAT PUMP

DISABLE NIGHT REDUCT

NIGHT MODE START TIME

HEAT PUMP

NIGHT MODE STOP TIME

ANTILEGIO CUT OFF (only with water tank)

This function can be interrupted in advance in two different ways:

- set the boiler to OFF

- select STATE DHW ANTILEGIO CUTOFF.

If the function is interrupted, it will be repeated at the same

time the next day, even if weekly programming is active.

BOILER

STATE

MAIN ZONE

BOILER

MAIN ZONE

STATE

DHW

STATE

DHW

ANTILEGIO CUT OFF

2.7 SET

With this function it is possible to congure the setpoints.

Select SET HEATING or DHW or COOLING (if HP

connected) or WATER TANK SETPOINT (if WATER TANK

connected) or PREHEATING setpoints.

HEATING

COOLING

PREHEATING

SET

DHW

WATER TANK SETPOINT

HEATING

The user can change the heating setpoint by pressing the

“up” and “down” keys.

When an outdoor temperature sensor is installed, the outlet

setpoint temperature is automatically adjusted by the system,

in order to maintain the ambient temperature according to any

variations in the outdoor temperature. If you want to adjust

the outlet temperature, raising it or lowering it with respect

to that automatically calculated by the boiler, it is possible to

change the HEATING setpoint selecting the desired comfort

level within the range (-5 ÷ +5).

The user is then asked to confirm the setpoint setting: select

CONFIRM or CANCEL and confirm.

Once the selection is confirmed, the display returns to the

SET screen.If the selection is cancelled or the “back” key is

pressed you return to the previous SET screen.

SET

HEATING

78,0 °C

SET

THE PARAMETER

WILL BE CHANGED

CONFIRM CANCEL

CONFIRM OR DELETE

SELECTION

HOT WATER

The user can change the domestic hot water setpoint by

pressing the “up” and “down” keys.

The user is then asked to conrm the setpoint setting: select

CONFIRM or CANCEL and conrm.

Once the selection is conrmed, the display returns to the

previous SET screen. If the selection is cancelled or the

“back” key is pressed you return to the SET screen.

SET

HOT WATER

58,0 °C

SET

THE PARAMETER

WILL BE CHANGED

CONFIRM OR DELETE

SELECTION

CONFIRM CANCEL

COOLING (available if heat pump enabled for

cooling is installed)

Press the “up” and “down” keys to change the cooling

setpoint and then conrm. If the thermoregulation in cooling is

activated, the flow temperature value is automatically chosen

by the system, which rapidly adjusts the room temperature

according to the variations in the external temperature. If you

want to change the temperature value, increasing or decreasing

it compared to that automatically calculated by the electronic

board, you can change the COOLING setpoint by choosing the

desired comfort level (-5 ÷ +5) within the range. Then you are

asked to confirm the setpoint setting: select ENTER or BACK

using “up” and “down”,validate the choice by pressing OK.

Confirming the selection returns the display to the previous SET

screen. Cancelling the selection or pressing the BACK button

returns the display to the SET screen.

NOTE: this parameter is available when in the system a heat

pump enabled for room cooling is installed.

20,0

COOLING

°C

PREHEATING

This function keeps the water in the domestic hot water

exchanger hot, to reduce standby times when a request is

made. When the preheating function is enabled, the symbol

P comes on with a steady light at the top of the domestic

hot water icon. During burner ignition following a preheating

request, the symbol P starts flashing. It is possible to access the

PREHEATING function selecting SET on the main screen of the

REC10CH. Setting PREHEATING = 1 the boiler’s domestic hot

water function activates. To deactivate the preheating function,

set the parameter to PREHEATING = 0, the symbol P switches

off. The function is not active when the boiler is OFF.

TERMOSTATI SAN

PREHEATING

THE PARAMETER

WILL BE CHANGED

CONFIRM CANCEL

CONFIRM OR DELETE

SELECTION

WATER TANK SETPOINT (available if water tank

is connected)

b The parameter in question is available if pre-heating of

the heat pump on the domestic hot water tank is present.

Press “up” and “down” to modify the domestic hot water

setpoint stored in the water tank and heated by the heat pump

and conrm with OK.

Press BACK to return to the SET screen without making any

selections.

Then you are asked to conrm the setpoint setting: select

ENTER or BACK using “up” and “down” and validate the

choice by pressing OK.

Conrming the selection returns the display to the previous

SET screen. Canceling the selection or pressing the BACK

button returns the display to the SET screen.

TOUCH&GO

If you do not want to leave the PREHEATING function always

active and you need hot water ready immediately, it is possible

to preheat the domestic water only a few moments before

drawing. Set the parameter PREHEATING = 2 to activate

the Touch & Go function. This function allows, by opening

and closing the tap, to activate the instant preheating, which

prepares the hot water only for that withdrawal.

PREHEATING

2.8 INFO

The INFO function can be used to display a series of data

regarding the system.

ATTENTION - The displayed data is for information only and

cannot be modied.

SCREED HEATER OPERATING HOURS

DELIVERY PROBE

RETURN PROBE

DOMESTIC HOT WATER PROBE

HIGH STORAGE TANK PROBE

LOW STORAGE TANK PROBE

SOLAR COLLECTOR

FLUE GAS PROBE

OUTDOOR TEMPERATURE SENSOR

EXT T FOR THERMOREG

FLOW METER / DHW SETPOINT OT+

FAN

DELIVERY ZONE 1

DELIVERY ZONE 2

FLUE GAS PROBE OPERATING HOURS

MAIN ZONE SET-POINT

ZONE 1 SET-POINT

ZONE 2 SET-POINT

SYSTEM PRESSURE

HEAT PUMP DELIVERY

HEAT PUMP RETURN

HEAT PUMP EXT. TEMP.

TREFR LOW PRESSURE PIPE

TREFR HIGH PRESSURE PIPE

TREFR CONDENSER

TREFR HEAT EXCHANGER

HEAT PUMP OPERATING MODE

HEAT PUMP FREQUENCY

HEAT PUMP COMPRESSOR TIME

HEAT PUMP CIRCULATOR TIME

HEAT PUMP FLOW SWITCH

HEAT PUMP OUTPUT

HEAT PUMP SET-POINT

NEXT ANTI-LEGIONELLA

The “ok” key is inactive. The “back” key allows you to return

to the initial screen. In the absence of additional zones or if the

screed heater function is not operating, the relative information

will not be displayed.

NOTE: Some of the information might not be available on the

REC10CH depending on the access level, the status of the

machine or the system conguration.

2.9 MENU

Select MENU SETTINGS or TIME SCHEDULE

(available only if the timer is enabled (POR=1).

MON

18/11/2013 12:17

SETTINGS

SELECT OPTION

TIME SCHEDULE

SETTINGS

Select MENU SETTINGS TIME&DATE (you

can change HOURS, MINUTES, DAY, MONTH, YEAR) or

DAYLIGHT SAVINGS TIME or LANGUAGE (to select the

desired language) or BACKLIGHT.

TIME & DATE

LANGUAGE

SETTINGS

SELECT OPTION

BACKLIGHT

TIME & DATE

LANGUAGE

BACKLIGHT

SETTINGS

SELECT OPTION

TIME & DATE

DAYLIGHT SAVINGS TIME

ENTER TIME AND DATE

USE THE ARROWS TO MODIFY

12 17

09/04/2021

TIME & DATE

ENGLISH

LANGUAGE

SELECT LANGUAGE

ITALIANO

MIN

BACKLIGHT

SET THE INTERVAL OF TIME BEFORE AUTOMATIC

SHUT-OFF OF THE SCREEN

TIME AND DATE: press “ok” to highlight in sequence

HOURS, MINUTES, DAY, MONTH, YEAR and press the “up”

and “down” keys to change the desired values.

Once the sequence has nished by pressing “ok”, the settings

will be saved and the display will return to the initial screen.

By pressing “back” at any time the system will return to the

SETTINGS cancelling the changes that were made.

DAYLIGHT SAVINGS TIMES: by selecting FUNCTION

ACTIVE the device automatically manages the change of time

from solar to daylight savings time and vice versa.

LANGUAGE: press the “up” and “down” keys to select the

desired language. Pressing “ok” the language selection is

conrmed and the display returns to the initial screen.

Pressing “back” the system returns to the SETTINGS screen

without changing the system’s language.

BACKLIGHT: the screen saver display (backlight off) is

automatically activated when the time, that has been set in

parameter MENU SETTINGS BACKLIGHT,

elapsed without having pressed any buttons.

In the screen saver the current time is normally displayed.

“” symbol and the number of days to STOP appear if the

AUTOSTOP function is active. When there is a heat request,

the current time is replaced with the boiler ow temperature

and turns on the icon concerning the type of request in

progress. A system efciency indicator is also displayed at the

top of the screen:

- HIGH EFFICIENCY (if the average value of the return probe

> 55°C)

- OPTIMUM EFFICIENCY (if average value of the return

probe < 55°C).

: 30 days

05:11 42

OPTIMUM EFFICIENCY

°C

: 30 days

TIME SCHEDULE

Select MENU TIME SCHEDULE (only if the time

schedule is enabled MAIN (if POR=1) or ZONE 1 (if

POR=1) or ZONE 2 (if POR=1) or HP DHW.

NOTES

- the HP DHW parameter is available if the system is fitted

with a heat pump that heats the domestic hot water in the

storage tank

- for the HP DHW parameter, there are two time schedules:

one for winter and the other for summer. select the required

season (HOT WATER ONLY or HEATING AND HOT

WATER) from the STATE/BOILER menu, then program the

HP DHW parameter.

WARNING: in HOT WATER ONLY, the parameter is factory

set to keep time schedule active every day of the week

from 05:00 to 08:00, to prevent continuous heat pump cycle

reversals if the cooling function is active. If you want to alter

this setting, contact the professionally qualied personnel.

For a detailed description of the scheduled programming

timer, please refer to the section

“2.10 TIME SCHEDULE”

MAIN

ZONE 1

ZONE 2

MON

12/04/2021 12:17

SCHEDULE

HP DHW

2.10 TIME SCHEDULE

Select the desired day using the “up” and “down” keys.

A table will be displayed indicating the day and the time

settings that have been pre-programmed. Press “ok” to

access the programming for the selected day.

Pressing “back” takes you back to the initial screen without

making any selection.

SELECT

A DAY

START

MAIN

THURSDAY

07:30

11:30

18:00

END

08:30

13:30

22:30

ZONE SCHEDULE

Once the selection has been made, the user can choose from

among the following options:

ADD (you can add up to four start

& end periods) - MODIFY - DELETE - COPY.

ADD

This function serves to add a new time frame to the selected

day (up to a maximum of 4).

START

MAIN

ADD

THURSDAY

MODIFY

DELETE

COPY

07:30

11:30

18:00

END

08:30

13:30

22:30

SELECT OPTION

The user can increase or decrease by 30 minutes the

start

time and the

end

time.

START

MAIN

THURSDAY

ADD

PERIOD

ENTER

START TIME

14:00

07:30

11:30

18:00

END

08:30

13:30

22:30

USE THE ARROWS TO MODIFY

START

MAIN

THURSDAY

ADD

PERIOD

ENTER

END TIME

15:00

07:30

11:30

18:00

END

08:30

13:30

22:30

USE THE ARROWS TO MODIFY

14:00

In order to conrm that the operation has been completed

successfully, the display will show the table with the new time

frame ashing.

MAIN

USE THE ARROWS TO MODIFY

START THURSDAY

07:30

11:30

14:00

END

08:30

13:30

15:00

18:00 22:30

ADD

MODIFY

DELETE

COPY

MODIFY

This function serves to edit a time frame already present for

the selected day.

START

MAIN

ADD

THURSDAY

MODIFY

DELETE

COPY

07:30

11:30

18:00

END

08:30

13:30

22:30

SELECT OPTION

Select the desired time band.

START

MAIN

THURSDAY

SELECT

PERIOD TO

MODIFY

07:30

11:30

18:00

END

08:30

13:30

22:30

USE THE ARROWS TO MODIFY

The user can increase or decrease by 30 minutes the

start

time and the

end

time.

START

MAIN

THURSDAY

11:30

07:30

11:30

18:00

END

08:30

13:30

22:30

USE THE ARROWS TO MODIFY

ENTER

START TIME

START

MAIN

THURSDAY

14:00

07:30

11:30

18:00

END

08:30

13:30

22:30

USE THE ARROWS TO MODIFY

ENTER

END TIME

In order to conrm that the operation has been completed

successfully, the display will show the table with the new time

frame ashing.

At this point the user can select a new time frame to be

modied, or else can press “back” to return to the previous

TIME SCHEDULE screen.

START

MAIN

THURSDAY

SELECT

PERIOD TO

MODIFY

07:30

11:30

18:00

END

08:30

14:00

22:30

USE THE ARROWS TO MODIFY

DELETE

This function serves to delete a time frame already present for

the selected day.

START

MAIN

THURSDAY

07:30

11:30

18:00

END

08:30

13:30

22:30

SELECT OPTION

ADD

MODIFY

DELETE

COPY

Select the desired time band.

START

MAIN

THURSDAY

SELECT

PERIOD TO

DELETE

07:30

11:30

18:00

END

08:30

13:30

22:30

USE THE ARROWS TO MODIFY

Conrm or cancel the selection made.

In order to conrm that the operation has been completed

successfully, the display will show the table with the selected

time frame ashing just before deleting it from the table.

START

MAIN

THURSDAY

ARE YOU SURE

TO DELETE

THE PERIOD ?

END

CONFIRM OR DELETE SELECTION

07:30

11:30

18:00

08:30

13:30

22:30

CONFIRM

CANCEL

COPY

This function serves to copy the same scheduled programme

for other days of the week.

START

MAIN

THURSDAY

07:30

11:30

18:00

END

08:30

13:30

22:30

SELECT OPTION

ADD

MODIFY

DELETE

COPY

Select the day on which to copy the hourly schedule to.

CONFIRM

MON TUE WED THU

SAT SUN

FRI

MAIN

SELECT DAYS ON WHICH YOU WANT

TO COPY SCHEDULE OF THURSDAY

USE THE ARROWS TO MODIFY

The day will be highlighted and others can be selected using

the same

procedure

CONFIRM

MON TUE WED THU

SAT SUN

FRI

MAIN

SELECT DAYS ON WHICH YOU WANT

TO COPY SCHEDULE OF THURSDAY

USE THE ARROWS TO MODIFY

In order to conrm that the operation has been completed

successfully, the display will show the list of days to which the

scheduled programme has been copied.

MAIN

SCHEDULE OF THURSDAY

WILL BE COPIED ON THE DAYS :

TUESDAY

USE THE ARROWS TO MODIFY

2.11 FAULTS

Should a fault occur, a screen will appear on the display

indicating the relative error code and a brief alphanumeric

description of the fault. Pressing the “back” button it is

possible to return to the main screen, where a fault is signalled

by this ashing icon .

FRI

18/05/2013 12:17

INFO SET

PLANT

HOT WATER TEMPERATURE

STATE

42°C

Move inside the display until the icon is highlighted. The

error message will be displayed. The faults description screen

is automatically displayed once the display illumination time

has elapsed without any button being pressed.

For fault E041: if the pressure drops below the safety threshold

of 0.3 bar the boiler displays the fault code “E041 - WATER

TRANSDUCER LOAD THE SYSTEM” for a transitional time

of 30 sec during which it is possible to open the external lling

tap until the pressure is between 1 and 1.5 bar.

E041

WATER TRANSDUCER

LOAD THE SYSTEM

b If the pressure drops frequently, contact the Technical

Assistance Centre.

For fault E060: the boiler is working normally, but does not

provide any stability of the domestic hot water temperature

that, in any event, is supplied at a temperature of around

50°C. The intervention of the Technical Assistance Service is

required.

For fault E091: the boiler has an auto-diagnostic system

which, based on the total number of hours in certain operating

conditions, can signal the needto clean the primary heat

exchanger. The intervention of the Technical Assistance

Centre is necessary.

Boiler faults list

ERROR

CODE ERROR MESSAGE DESCRIPTION OF

ALARM TYPE

E010 ame lockout/ACF electronic fault nal

E011 extraneous ame transitional

E020 limit thermostat nal

E030 fan fault nal

E040 water transducer - check system water pressure nal

E041 water transducer - check system water pressure temporary

E042 water transducer fault nal

E060 domestic hot water probe fault temporary

E070 fault ow sensor • overtemperature ow sensor • ow/return sensor differential alarm temporary • nal • nal

E077 main zone water thermostat temporary

E080 fault return line probe • return line probe overtemperature • outlet/return line probe differential alarm temporary • nal • nal

E090 fault ue gases probe • ue gases overtemperature probe temporary • nal

E091 clean primary heat exchanger temporary

E099 reset attempts exhausted, boiler blocked denitive, not resettable

-- water pressure low - verify the system pressure temporary

-- water pressure high check system temporary

-- boiler board communication lost temporary

-- BUS 485 communication lost temporary

List of combustion faults

ERROR

CODE ERROR MESSAGE DESCRIPTION OF TYPE OF ALARM

E021 iono alarm

These are temporary alarms that if they occur several times in an hour they become denitive;

the alarm E097 is displayed and is followed by post-purging for 45 seconds at the fan’s maximum

speed.

It is always possible to release the alarm before the end of the post-purging.

E022 iono alarm

E023 iono alarm

E024 iono alarm

E067 iono alarm

E088 iono alarm

E097 iono alarm

E085 combustion fault/high CO These are temporary alarms that if they occur several times in an hour they become denitive; the

last error to occur is displayed and is followed by a post-purging of 2 minutes at the fan’s maximum

speed. It is not possible to release the alarm before the end of the post-purging unless the boiler’s

power supply is switched off.

E094 combustion fault/high CO

E095 combustion fault/high CO

E058 mains voltage fault These are temporary faults that restrict the ignition cycle.

E065 current modulation alarm

E086 obstruction fumes alarm Temporary fault reported during the post ventilation. It is maintained a post ventilation of 5 min at

maximum fan speed

3. HOW TO...

3.1 HOW TO TOP-UP THE SYSTEM

PRESSURE

The system pressure must be checked periodically to ensure

the correct operation of the boiler. The system pressure is

shown at the top of the LCD display or can be read on the

gauge located on the underside of the appliance. When the

boiler is at room temperature, the system pressure should be

approximately 1.0 bar.

If the pressure requires ‘topping-up’use the following instructions

as a guide.

- Locate the lling valve connections (usually beneath the

boiler, see g. 2).

- Attach the lling loop to both connections.

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

system.

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

reads between 1 and 1.5 BAR.

- Remove the lling loop from the connections.

4. WHAT IF...

4.1 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 ofce.

4.2 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.

4.3 WHAT IF THE APPLIANCE IS DUE ITS

ANNUAL SERVICE

Advice for tenants only

Your landlord should arrange for servicing.

3.2 HOW TO RESET THE APPLIANCE

Reset function

In order to reset the boiler’s operation in the event of a fault,

it is necessary to access the fault description screen. If the

lockout is of a non-volatile type that requires a reset procedure,

this will be indicated on the screen, and can be carried out by

pressing the “ok” button on the REC10CH.

E020

LIMIT THERMOSTAT

PRESS OK RESET

At this point, if the correct operating conditions have been

restored, the boiler will restart automatically.

Up to a maximum of 3 reset attempts can be made using

the REC10CH. In case of all the attempts are exhausted

the definitive fault E099 occurs on the display. After these

operations the machine must be disconnected from the power

supply to reset the number of attempts available.

b If the attempts to reset the fault do not restore the

boiler’s functionality, please contact your local Customer

Support Service.

E020

LIMIT THERMOSTAT

REC10 ATTEMPTS EXHAUSTED

3.3 HOW TO SHUT DOWN THE SYSTEM FOR

SHORT PERIODS

If necessary the boiler status can be switched to the OFF

position during short periods of absence.

BOILER

OFF

SUMMER

WINTER

Provided that the electrical and gas supplies remain switched

ON to the appliance, the following frost-protection functions

will remain active in order to protect the appliance:

- heating frost-protection: this function is activated if the

temperature measured by the flow sensor drops below 5°C.

A heat request is generated in this phase with the ignition of

the burner at minimum output, which is maintained until the

outlet water temperature reaches 35° C;

- DHW frost-protection: the function starts if the temperature

measured by the DHW sensor falls below 5°C. A heat request

is generated in this phase with the ignition of the burner at

minimum output, which is maintained until the outlet water

temperature reaches 55° C.

b The activation of the FROST-PROTECTION function

is indicated by a scrolling message at the base of the

REC10CH display.

- pump anti-blocking:the circulating pump is energised

for a 30-second period if it remains inactive for more than

24-hours.

3.4 HOW TO SHUT DOWN THE SYSTEM FOR

LONG PERIODS

If the boiler will not be in used for a prolonged period of time,

the following operations must be carried out:

- switch the boiler to OFF

- isolate the appliance from the gas and electricity supplies.

In this case, the frost-protection and anti-blocking systems

are deactivated. Drain both the heating and domestic water

systems to avoid any risk of freezing.

OFF

BOILER

OFF

SUMMER

WINTER

3.5 HOW TO CARE FOR THE APPLIANCE

To clean the outer casing use only a clean damp cloth. Do not

use any scourers or abrasive cleaners.

control

valve

temporary

connection

control

valve

supply pipe

double

check valve

ow/return

pipe

Fig. 2

Advice for homeowners

Please contact Vokèra Customer Service (0844 3910999 (UK)

or 056 7755057 (ROI) if you would prefer a Vokèra service

engineer or agent to service your appliance. Alternatively your

local GAS SAFE registered engineer may be able to service

the appliance for you.

4.4 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

appliance log book. It is a requirement of your warranty terms

& conditions that your Benchmark logbook has been lled out

correctly and is fully up to date.

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 UNICA MAX has a ACC (Active Combustion Control)

system. This control system ensures functionality, efciency

and low emissions under any conditions.

The ACC system uses an ionisation sensor immersed in the

burner ame, whose information allows the control board to

operate the gas valve that regulates the fuel.

This sophisticated control system provides the auto-regulation

of the combustion, so there is no need for an initial calibration.

The ACC system is able to adapt the boiler to operate with

different gas compositions, different outlet pipes lengths and

different altitudes (within the specied design limits).

TheACC system can also perform an auto-diagnostic operation

that locks out the burner before the permitted upper emission

limit is exceeded.

The UNICA MAX product family comprises a range of high-

efciency combination boilers. These appliances – by design

– incorporate electronic ignition, circulating pump, expansion

vessel, safety valve, pressure gauge and automatic by-pass.

The range is produced as room sealed, category II2H3P-

II2HY203P appliances, suitable for internal wall mounting

applications only. Each appliance is provided with a fan powered

ue outlet with an annular co-axial combustion air intake that

can be rotated – horizontally – through 360 degrees for various

horizontal or vertical 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

Vokèra website - www.vokera.co.uk.

The 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) 2017/1369 Energy labeling;

- 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 Analogue pressure gauge

2 Drain valve

3 Diverter valve

4 Pressure transducer

5 Safety valve

6 Pump

7 Lower auto air vent

8 De-aeration valve

9 Air lter

10 Flow sensor (NTC)

11 Limit thermostat

12 Main heat exchanger

13 Detection electrode

14 Burner

15 Ignition electrode

16 Ignition transformer

17 Fume analysis cap

18 Top ue outlet

19 Flue sensor

20 Expansion vessel

21 Clapet

22 Fan

23 Mixer

24 Return sensor

25 Injector

26 Gas valve

27 DHW sensor

28 Siphon

29 Flowmeter

30 DHW exchanger

R Heating return connection

F Heating ow connection

G Gas connection

O Hot water outlet

I Cold water inlet

INTRODUCTION

INSTALLATION AND SERVICING INSTRUCTIONS

R F G O I Fig. 3

1.1 PRINCIPLE COMPONENTS

• A fully integrated electronic control board featuring electronic

temperature control, anti-cycle control, pump over-run, self-

diagnostic fault indicator, full air/gas modulation

• Stainless-steel heat exchanger

• Electronic ignition with ame supervision

• Integral high-head pump

• Fan

• Expansion vessel

• Water owmeter

• Flue sensor

• Pressure transducer

• 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 divertor 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 REC/or any external

control, the pump and fan are started, the fan speed will modulate

until the correct signal voltage is received at the control PCB.

At this point an ignition sequence is enabled.

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

at the burner. Once successful ignition has been achieved, the

electronic circuitry increases the gas rate to 75% for a period of

15 minutes. Thereafter, the boiler’s output will either be increase

to maximum or modulate to suit the set requirement. When

the appliance reaches the desired temperature the burner will

shut down and the boiler will perform a three-minute anti-cycle

(timer delay).

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

pump and fan may continue to operate to dissipate any residual

heat within the appliance.

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 ame

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 satised the appliance

pump and fan may continue to operate to dissipate any residual

heat within the appliance.

1. SECTION - DESIGN PRINCIPLES AND OPERATING SEQUENCE

1.5 SAFETY DEVICES

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

• a pressure transducer that monitors system water pressure

and will de-activate the pump, fan, and burner should the

system water pressure drop below the required minimum

value;

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

• a high limit thermostat that over-rides the temperature control

circuit to prevent or interrupt the operation of the burner;

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

signal is detected and/or when incomplete combustion or

high emissions are detected;

• ue sensor that will shut down the burner if the ue threshold

temperature is exceeded;

• a safety valve which releases excess pressure from the

primary circuit.

NOTE: when the appliance is rst switched ON or when the

electrical supply is interrupted then restored, the appliance

will enter a short ‘purge’ cycle whereby the pump cycles ON &

OFF for approximately 2-minutes. Only when the ‘purge’ cycle

has been completed, will the appliance go through an ignition

sequence.

return

flow

DHW

outlet

DHW

inlet

DHW

flowmeter

Flow

restrictor

DHW

non-return

valve

Drain

valve

Safety

valve

Automatic

by-pass

Diverter

valve

Pressure

transducer

Pump

Analogue

pressure

gauge

Lower

AAV

Expansion

vessel

DHW heat

exchanger DHW

temperature sensor

Return

temperature

sensor

Main heat

exchanger

AAV

High limit

thermostat

Flow

temperature

sensor

Fig. 4

2. SECTION - TECHNICAL DATA

2.1 Central Heating UNICA MAX 35C UNICA MAX 40C

Heat input (kW) 32.00 32.00

Maximum heat output (kW) 60/80°C 31.23 31.23

Minimum heat output (kW) 60/80°C 4.69 4.69

Maximum heat output (kW) 30/50°C 34.37 34.37

Minimum heat output (kW) 30/50°C 5.06 5.06

Minimum working pressure 0.25÷0.45 bar

Maximum working pressure 2.5 bar

Minimum ow rate 350 l/h

2.2 Domestic Hot Water UNICA MAX 35C UNICA MAX 40C

Heat input (kW) 34.60 40.00

Flow Rate: ΔT35°C 14.9 16.4

Maximum inlet pressure 8 bar

Minimum inlet pressure 0.2 bar

Minimum ow rate 2 l/min

Flow regulator 12 l/min 14 l/min

2.3 Gas Pressures UNICA MAX 35C UNICA MAX 40C

Inlet pressure (G20) 20.0 mbar 20.0 mbar

Heating maximum gas rate (m3/hr) 3.38 3.38

DHW maximum gas rate (m3/hr) 3.66 4.23

Minimum gas rate (m3/hr) 0.52 0.52

Injector size (mm) 5.2 5.2

2.4 Expansion Vessel UNICA MAX 35C UNICA MAX 40C

Capacity 10 litres

Maximum system volume 74 litres

Pre-charge pressure 1 bar

2.5 Dimensions UNICA MAX 35C UNICA MAX 40C

Height (mm) 740

Width (mm) 470

Depth (mm) 350

Dry weight (kg) 39,5 39,5

2.6 Clearances required for maintenance UNICA MAX 35C UNICA MAX 40C

Sides 2mm*

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

Bottom 100mm^

Front 450mm^^

* It may be necessary to remove adjacent components if component removal/replacement is required

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

^ This can be reduced to 4mm if a removal panel enables the required 100mm

^^ When installed in a cupboard, this dimension can be reduced to 4mm provided that the required 450mm is available when the door is opened/

removed.

2.7 Connections UNICA MAX 35C UNICA MAX 40C

Flow & return 22mm

Gas 15mm

DHW hot & cold 15mm

Safety valve 15mm

Condense 21mm

2.8 Electrical UNICA MAX 35C UNICA MAX 40C

Power consumption CH (Watts) 101

Power consumption DHW (Watts) 112

Voltage (V/Hz) 230/50

Internal fuse 4 A T (for PCB) - 3.15A F (for connections block)

External fuse 3A

2.9 Flue Details (concentric 60-100) UNICA MAX 35C UNICA MAX 40C

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

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

2.10 Efficiency UNICA MAX 35C UNICA MAX 40C

SEDBUK 2005 (%) 90.1 90.1

2.11 Emissions UNICA MAX 35C UNICA MAX 40C

CO2 @ maximum output (%) (*) 9.0 9.0

CO2 @ minimum output (%) (*) 9.0 9.0

CO @ maximum output (ppm) 170 170

CO @ minimum output (ppm) 10 10

NOx rating class 6 class 6

(*) CO2tolerance= +0.6% -1%

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

With reference to the Delegated Regulation (EU) No. 811/2013, the information in the table can be used for completing the product

data sheet and the labelling for room heating appliances, for mixed heating appliances, for all those appliances for enclosed space

heating, for temperature control devices and solar devices:

ADDED DEVICES CLASS BONUS

OUTDOOR TEMPERATURE SENSOR II 2%

CONTROL PANEL* V 3%

OUTDOOR TEMPERATURE SENSOR + CONTROL PANEL* VI 4%

(*) Set as ambient regulator

2.12 Fan rotations UNICA MAX 35C UNICA MAX 40C

Number of fan rotations with slow ignition (rpm) 5,500 5,500

Maximum number of heating fan rotations (rpm) 7,300 7,300

Minimum number of heating fan rotations (rpm) 1,700 1,700

Maximum number of DHW fan rotations (rpm) 7,800 9,100

Minimum number of DHW fan rotations (rpm) 1,700 1,700

2.13 Gas pressure UNICA MAX 35C UNICA MAX 40C

Nominal methane gas pressure (G20 - I2H) 20 mbar 20 mbar

Nominal methane-hydrogen gas pressure

(G20.2 - I2Y20) 20 mbar 20 mbar

Nominal liquid gas LPG pressure (G31 - I3P) 37 mbar 37 mbar

Parameter Symbol UNICA

MAX 35C

UNICA

MAX 40C

Unit

Seasonal space heating energy efciency class - A A -

Water heating energy efciency class - A A -

Rated heat output Pnominal 31 31 kW

Seasonal space heating energy efciency ηs 94 94 %

Useful heat output

At rated heat output and high-temperature regime (*) P4 31,2 31,2 kW

At 30% of rated heat output and low-temperature regime (**) P1 10,5 10,5 kW

Useful efciency

At rated heat output and high-temperature regime (*) η4 87,9 87,9 %

At 30% of rated heat output and low-temperature regime (**) η1 98,6 98,6 %

Auxiliary electricity consumption

At full load elmax 49,0 49,0 W

At part load elmin 13,0 13,0 W

In Stand-by mode PSB 3,0 3,0 W

Other parameters

Stand-by heat loss Pstby 26,0 26,0 W

Pilot ame energy consumption Pign - - W

Annual energy consumption QHE 96 96 GJ

Sound power level, indoors LWA 54 54 dB

Emissions of nitrogen oxides NOx 38 38 mg/kWh

For combination heaters

Declared load prole XL XL

Water heating energy efciency ηwh 85 85 %

Daily electricity consumption Qelec 0,157 0,157 kWh

Daily fuel consumption Qfuel 22,986 22,986 kWh

Annual electricity consumption AEC 34 34 kWh

Annual fuel consumption AFC 17 17 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).

2.14 Residual head of the circulator

The boiler is equipped with a high efciency modulating circulator

already connected hydraulically and electrically, the available

useful performances of which are indicated in the graph. The

modulation is managed by the board through the DUTY CYCLE

PUMP parameter - INSTALLER access level. The circulator is

factory set with a 7 meter head curve.

The boiler is equipped with an anti-blocking system that

starts an operating cycle every 24 hours of rest in any ope-

rating state.

The “anti-blocking” function is active only if the boiler is

electrically powered.

If there is a need to use a different curve, the desired level can be

selected on the circulator.

If you need to “

release” the seized rotator shaft, please

see “6.1.1 FIRST IGNITION ERRORS”

2.14.1 Variable speed circulator

The modulating circulator function is active only in the heating

function. When switching the three-way to the sanitary, the circu-

lator always works at maximum speed. The modulating circulator

function applies only to the boiler circulator and not to the circu-

lators of any external connected devices (e.g. booster circulator).

Through the DUTY CYCLE PUMP parameter it is possible to cho-

ose between 4 management modes according to the situations

and the type of system.

1 - VARIABLE SPEED CIRCULATOR WITH PROPORTIONAL

MODE (41 <= DUTY CYCLE PUMP <= 100)

In this mode the boiler card determines which ow curve to adopt

according to the instantaneous power delivered by the boiler.

2 - VARIABLE SPEED CIRCULATOR WITH CONSTANT ∆T

MODE (2 <= DUTY CYCLE PUMP <= 40)

In this mode, the installer sets the ∆T value to be maintained

between ow and return (e.g .: by entering a value = 10, the circu-

lator speed will change to obtain a system ow rate with the aim

of maintaining the ∆T between the upstream and downstream of

the exchanger of 10°C).

3 - CIRCULATOR IN MAXIMUM FIXED SPEED MODE

(

DUTY

CYCLE PUMP

= 1)

In this mode the circulator, when activated, always works at

maximum speed.

Used on systems with high pressure drop where it is necessary

to make the most of the boiler head in order to ensure sufcient

circulation (system ow rate at maximum speed less than 600

liters per hour).

Used in the presence of mix bottles with high ow rates in the

downstream circuit.

Operationally:

- Enter the DUTY CYCLE PUMP parameter

- Set the value = 1

4 - EXCEPTIONAL USE OF A STANDARD NON-SPEED

ADJUSTABLE CIRCULATOR (DUTY CYCLE PUMP = 0)

This mode must be used in exceptional cases in which a

traditional UPS circulator is to be used in the boiler.

CONFIGURATIONS RECOMMENDED BY THE MANUFACTU-

RER

EXTERNAL SENSOR YES

(WEATHER

COMPENSATION)

EXTERNAL SENSOR

(NO WEATHER

COMPENSATION)

LOW

TEMPERATURE

(floor)

ΔT constant

(5 ≤ DUTY CYCLE PUMP ≤ 7)

PROPORTIONAL

(DUTY CYCLE PUMP = 85)

HIGH

TEMPERATURE

(radiators without

thermostatic valves)

ΔT constant

(15 ≤

DUTY CYCLE PUMP

≤ 20)

PROPORTIONAL

(DUTY CYCLE PUMP = 85)

HIGH

TEMPERATURE

(radiators with

thermostatic valves)

ΔT constant

(15 ≤

DUTY CYCLE PUMP

≤ 20)

PROPORTIONAL

(DUTY CYCLE PUMP = 60)

Flow rate (l/h)

Residual head (mbar)

7-metre circulator

100

150

200

250

300

350

400

450

500

550

600

650

700

0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500

Prevalenza [mbar]

Portata impianto [l/h]

100

85 (default)

Key Location Minimum distance

A Below an opening (window, air-brick, etc.) 300 mm

B Above an opening (window, air-brick, etc.) 300 mm

C To the side of an opening (window, air-brick, etc.) 300 mm

D Below gutter, drain-pipe, etc. 25 mm

E Below eaves 25 mm

F Below balcony, lowest point of carport roof, etc. 25 mm

G To the side of a soil/drain-pipe, etc. 25 mm (60mm for 80/125mm)

H From internal/external corner 25 mm (60mm for 80/125mm)

I Above ground, roof, or balcony level 300 mm

J From a surface or boundary facing the terminal 600 mm*

K From a terminal facing a terminal 1200 mm

L From an opening in the car-port into the building 1200 mm

M Vertically from a terminal on the same wall 1500 mm

N Horizontally from a terminal on the same wall 300 mm

P From a structure to the side of the vertical terminal 300 mm

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

of the vertical terminal

R To the side of a boundary 300 mm

S To the side of an opening or window on a pitched roof 600 mm

T Below an opening or window on a pitched roof 2000 mm

V From a vertical terminal to an adjacent opening (window, air-brick, etc.) 2000 mm

W From a vertical terminal to an adjacent vertical terminal 300 mm (only if both terminals are the same height)

Fig. 5

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

3. SECTION - CONTROL PANEL (REC10CH)

Pressing the keys

“up” and “down”

it is possible to choose

from among the following options:

• PLANT: the display will indicate the temperature of the

domestic hot water sensor rather than the flow sensor of

the boiler

• STATE/BOILER: enables access to choose the operating

mode of the appliance: OFF, Summer, Winter

• STATE/MAIN ZONE (if embedded clock disabled): enables

access to choose the operating mode (On or OFF) of the

main heating zone

• STATE/MAIN ZONE (if embedded clock is enabled):

enables access to choose operating mode of the embedded

clock (AUTO, MANUAL, OFF)

• SET: to view or adjust the heating or hot water setpoint

value or to enable or disable preheating

• INFO: to view the current values or status of the various

appliance inputs/sensors

• MENU: to access the system’s configuration menus

The REC10CH is a fully functional UI (User Interface) that acts as a visual reference for the appliance and system status; and

can also be used to view, input and adjust relevant system parameters and functions (also for solar system and heat pump if

present).

The centre of the UI will normally display the current operating temperature (according to the mode of operation); however when

the screensaver is active, the current time will be displayed.

The value expressed in bar refers to the system’s water pressure.

The top of the screen shows the information regarding the current date and time, as well as the outdoor temperature, if available.

On the left and right sides are displayed the icons indicating the status of the system; their meaning is as follows.

REC10CH

Boiler control panel

Key area

Confirm

back= ret

urn to the previous screen

cancel selection

return to the main screen (press > 2 sec.)

- From the main screen they allow you to choose between

the options: MENU, INFO, SET, STATE, PLANT.

- From the sub-menus they allow you to navigate through

the different options