Vaillant EcoTEC plus VU Series Manuel utilisateur

en Operating instructions

ecoTEC plus

VU../VUW../VUI..

0020308119_02 - 28.11.2022

2Operating instructions 0020308119_02

Operating instructions

Contents

1 Safety ............................................ 3

1.1 Intended use .................................. 3

1.2 Qualification ................................... 3

1.3 General safety information............. 3

2 Notes on the documentation ...... 6

3 Product description..................... 6

3.1 Display and control elements......... 6

3.2 Displayed symbols......................... 7

3.3 Serial number ................................ 7

3.4 CE marking .................................... 7

3.5 UKCA mark.................................... 8

3.6 Hot Water Association ................... 8

3.7 Benchmark..................................... 8

4 Operation...................................... 8

4.1 Operating concept ......................... 8

4.2 Setting the language...................... 9

4.3 Activating/deactivating the

button lock ................................... 10

4.4 Heating mode .............................. 10

4.5 DHW mode .................................. 10

4.6 Using the sensoROOM pure

(VRT 50/2) room temperature

control .......................................... 11

4.7 Calling up status codes................ 13

5 Care and maintenance .............. 13

5.1 Caring for the product .................. 13

5.2 Maintenance ................................ 13

5.3 Reading maintenance

messages .................................... 13

5.4 Maintaining the pressure of the

heating system............................. 13

5.5 Checking the condensate

discharge pipe and tundish.......... 16

6 Troubleshooting ........................ 16

7 Decommissioning...................... 16

7.1 Temporarily decommissioning

the product................................... 16

7.2 Permanently decommissioning

the product................................... 16

8 Restarting ................................... 16

9 Recycling and disposal............. 17

10 Guarantee and customer

service ........................................ 17

10.1 Guarantee.................................... 17

10.2 Customer service......................... 17

Appendix ............................................... 18

A End user level ............................ 18

A.1 Additional functions...................... 19

B Status codes .............................. 19

C Fault codes/limp home mode

codes .......................................... 20

D Troubleshooting ........................ 20

0020308119_02 Operating instructions 3

1 Safety

1.1 Intended use

The product is intended as a

heat generator for sealed heat-

ing installations and for do-

mestic hot water generation.

Intended use also includes the

following:

–Using the product while ob-

serving the operating instruc-

tions included for the product

and any other installation

components

–Observing all inspection and

maintenance intervals listed in

the instructions

Any other use that is not spe-

cified in these instructions, or

use beyond that specified in this

document, shall be considered

improper use.

Improper use of any kind is

prohibited.

1.2 Qualification

▶Employ only a qualified com-

petent person to install, con-

vert and set the product.

As the end user, you may carry

out all of the work that is de-

scribed in these instructions.

Exception: This product can be

used by children aged from 8

years and above and persons

with reduced physical, sensory

or mental capabilities or lack of

experience and knowledge if

they have been given supervi-

sion or instruction concerning

use of the product in a safe way

and understand the hazards in-

volved. Children must not play

with the product. Cleaning and

user maintenance work must

not be carried out by children

unless they are supervised.

Work that is described in other

instructions must only be car-

ried out by persons who meet

the requirements described

therein.

1.3 General safety

information

The following sections convey

important safety information. It

is essential to read and observe

this information in order to pre-

vent risk of death, risk of injury,

material damage or environ-

mental damage.

1.3.1 Gas

If you smell gas:

▶Avoid rooms that smell of

gas.

▶If possible, open doors and

windows fully and ensure

adequate ventilation.

▶Do not use naked flames (e.g.

lighters, matches).

▶Do not smoke.

▶Do not use any electrical

switches, mains plugs, door-

4Operating instructions 0020308119_02

bells, telephones or other

communication systems in

the building.

▶Close the emergency control

valve or the main isolator.

▶If possible, close the gas

stopcock on the product.

▶Warn other occupants in the

building by yelling or banging

on doors or walls.

▶Leave the building immedi-

ately and ensure that others

do not enter the building.

▶Alert the police and fire bri-

gade as soon as you are out-

side the building.

▶Use a telephone outside the

building to inform the emer-

gency service department of

the gas supply company.

1.3.2 Risk of death from

escaping gas

What to do if you smell gas in

the building:

▶Avoid rooms that smell of

gas.

▶If possible, open doors and

windows fully and ensure

adequate ventilation.

▶Do not use naked flames (e.g.

lighters, matches).

▶Do not smoke.

▶Do not use any electrical

switches, mains plugs, door-

bells, telephones or other

communication systems in

the building.

▶If it is safe to do so, close the

emergency control valve or

the main isolator.

▶If possible, close the gas

stopcock on the product.

▶Warn other occupants in the

building by yelling or banging

on doors or walls.

▶Leave the building immedi-

ately and ensure that others

do not enter the building.

▶Notify the gas supply

company or the Emer-

gency Service Provider

+44 (0) 800 111999 by tele-

phone once you are outside

of the building.

1.3.3 Flue gas

If you smell flue gas:

▶Open all accessible doors

and windows fully to provide

ventilation.

▶Switch off the product.

▶Contact a competent person.

1.3.4 Subsequent product

modifications

▶Never remove, bridge or

block the safety devices.

▶Do not tamper with any of the

safety devices.

▶Do not damage or remove

any tamper-proof seals on

components.

▶Do not make any changes:

–The product itself

0020308119_02 Operating instructions 5

–to the gas, supply air, water

and electricity supply lines

–to the entire flue system

–to the entire condensate dis-

charge system

–to the expansion relief valve

–to the drain pipework

–to constructional conditions

that may affect the operational

reliability of the product

▶Ensure that there is an evenly

sufficient combustion air sup-

ply.

1.3.5 Material damage

▶Ensure that the combustion

air supply is always free of

fluorine, chlorine, sulphur,

dust, etc.

▶Ensure that no chemical sub-

stances are stored at the in-

stallation site.

▶During a period of frost, en-

sure that the heating install-

ation remains in operation

and that all rooms are heated,

even when you are away.

–If a control is installed,

switch the product on and

off using the control to keep

the frost protection devices

active.

▶If you cannot ensure the oper-

ation, have a competent per-

son drain the heating installa-

tion.

▶Only fill the heating installa-

tion with suitable heating wa-

ter and, in cases of doubt, ask

a competent person about

this.

1.3.6 Legionella

▶Have a competent person in-

form you about the measures

that should be taken to pro-

tect against Legionella in your

installation.

▶Do not set any water temper-

atures below 60 °C without

consulting the competent per-

son first.

6Operating instructions 0020308119_02

2 Notes on the

documentation

▶Always observe all operating instruc-

tions enclosed with the installation com-

ponents.

▶Store these instructions and all other

applicable documents for further use.

These instructions apply for the following

products only:

Product article number

VU 10CS/1-5 (N-GB)

ecoTEC plus 610

0010036009

VU 15CS/1-5 (N-GB)

ecoTEC plus 615

0010036010

VU 20CS/1-5 (N-GB)

ecoTEC plus 620

0010036011

VU 25CS/1-5 (N-GB)

ecoTEC plus 625

0010036012

VU 30CS/1-5 (N-GB)

ecoTEC plus 630

0010036013

VU 35CS/1-5 (N-GB)

ecoTEC plus 635

0010036014

VUW 20/26CS/1-5 (N-GB)

ecoTEC plus 826

0010036015

VUW 25/32CS/1-5 (N-GB)

ecoTEC plus 832

0010036016

VUW 30/36CS/1-5 (N-GB)

ecoTEC plus 836

0010036017

VUW 30/40CS/1-5 (N-GB)

ecoTEC plus 840

0010036018

VUI 30/40CS/1-5 (N-GB)

ecoTEC plus 940

0010036114

Gas Council Numbers

VU 10CS/1-5 (N-GB) ecoTEC

plus 610

41-694-45

VU 15CS/1-5 (N-GB) ecoTEC

plus 615

41-694-46

VU 20CS/1-5 (N-GB) ecoTEC

plus 620

41-694-47

VU 25CS/1-5 (N-GB) ecoTEC

plus 625

41-694-48

VU 30CS/1-5 (N-GB) ecoTEC

plus 630

41-694-49

VU 35CS/1-5 (N-GB) ecoTEC

plus 635

41-694-50

VUW 20/26CS/1-5 (N-GB)

ecoTEC plus 826

47-044-92

VUW 25/32CS/1-5 (N-GB)

ecoTEC plus 832

47-044-93

VUW 30/36CS/1-5 (N-GB)

ecoTEC plus 836

47-044-94

VUW 30/40CS/1-5 (N-GB)

ecoTEC plus 840

47-044-95

VUI 30/40CS/1-5 (N-GB)

ecoTEC plus 940

47-044-96

3 Product description

3.1 Display and control elements

Control

element

Function

–Activate/deactivate standby

mode: Press for less than three

seconds

–Reset button: Press and hold

for more than three seconds to

restart

Setting the desired flow temperat-

ure from the boiler

Setting the desired domestic hot

water temperature from the boiler

–Calling up help

–Calling up the time programme

assistant (control module)

–Go one level back

–Cancelling input

–Calling up the menu

–Back to the main menu

–Calling up the basic display

–Confirming a selection/change

–Saving the set value

Call up chimney sweep mode

(carry out combustion analysis).

For competent persons only.

0020308119_02 Operating instructions 7

Control

element

Function

–Navigating through the menu

structure

–Reducing or increasing the set

value

–Navigating to individual num-

bers and letters

3.2 Displayed symbols

Symbol Meaning

Current burner modulation rate

(display in five levels).

Current system pressure

(display in five levels):

–Permanently on: Filling pres-

sure in the permitted range

–Flashing: Filling pressure

outside the permitted range

Heating mode activated:

–Permanently on: Burner off,

no heat demand

–Flashing: Burner on, heat

demand present

Heating mode is switched off

Domestic hot water generation

activated:

–Permanently on: Burner off,

no heat demand

–Flashing: Burner on, heat

demand present

Product with integrated do-

mestic hot water generation

or product with connected

domestic hot water cylinder

Comfort mode activated:

–Permanently on: Comfort

mode is activated

–Flashing: Burner on, comfort

mode on

Installer level active

Display locked

Connected to the system con-

trol

Connection to the Vaillant

server established

Symbol Meaning

Product is busy with a task.

Setting the time:

–Permanently on: Time is set

–Flashing: The time must be

reset

Warning

Fault in the product:

Appears instead of the basic

display, may be an explanatory

plain text display.

Limp home mode:

Appears instead of the basic

display, may be an explanatory

plain text display.

Maintenance required:

You can find more information

in code I.XXX.

Maintenance required:

Appears instead of the basic

display, may be an explanatory

plain text display.

3.3 Serial number

The serial numbers are located on the

underside of the front panel and on the

data plate.

The 3rd to 6th digits provide the produc-

tion date (year/week), the 7th to 16th digit

provide the article number for the product.

3.4 CE marking

The CE marking shows that the products

comply with the basic requirements of the

applicable directives as stated on the de-

claration of conformity.

The declaration of conformity can be

viewed at the manufacturer's site.

8Operating instructions 0020308119_02

3.5 UKCA mark

The UKCA marking shows that the

products comply with the basic require-

ments of the applicable directives as

stated on the declaration of conformity.

The declaration of conformity can be

viewed at the manufacturer's site.

3.6 Hot Water Association

Vaillant is a full member of the Hot Water

Association and promotes the scheme

in association with its cylinder range.

Details are available on the web site

www.vaillant.co.uk

3.7 Benchmark

Vaillant is a licensed member of the

Benchmark Scheme which aims to im-

prove the standards of installation and

commissioning of domestic heating and

hot water systems in the UK and to en-

courage regular servicing to optimise

safety, efficiency and performance.

Benchmark is managed and promoted

by the Heating and Hotwater Industry

Council. For more information visit

www.benchmark.org.uk.

▶Please ensure that the installer has fully

completed the Benchmark Checklist on

the inside back pages of the installation

instructions supplied with the product

and that you have signed it to say that

you have received a full and clear ex-

planation of its operation. The installer

is legally required to complete a com-

missioning checklist as a means of

complying with the appropriate Build-

ing Regulations (England and Wales).

All installations must be notified to Local

Area Building Control either directly or

through a Competent Persons Scheme.

A Building Regulations Compliance Certi-

ficate will then be issued to the customer

who should, on receipt, write the Notifica-

tion Number on the Benchmark Checklist.

This product should be serviced regularly

to optimise its safety, efficiency and per-

formance. The service engineer should

complete the relevant Service Record on

the Benchmark Checklist after each ser-

vice.

The Benchmark Checklist will be required

in the event of any warranty.

4 Operation

4.1 Operating concept

Control elements that are lit up in colour

can be selected.

Adjustable values and list entries can be

changed using the scrollbar. Briefly tap on

the top and bottom end of the scrollbar in

order to implement changes.

You must confirm a change to a value.

Only then is the new setting saved. You

have to press flashing control elements

again to confirm.

Control elements that are lit up in white are

active.

The menu and the control elements are

dimmed after 60 seconds in order to save

energy. The status display is shown after

another 60 seconds.

You can find additional assistance for the

control elements under MAIN MENU →

INFORMATION →Control elements.

0020308119_02 Operating instructions 9

4.1.1 Basic display

If the status display is shown, press to

call up the basic display.

In the basic display, you can set the de-

sired domestic hot water temperature and

flow temperature/desired temperature

(desired temperature only available for

products with a control module).

The flow temperature is the temperature

at which the heating water leaves the heat

generator (e.g. 65 °C).

The desired temperature is the temper-

ature that is actually desired for the living

room (e.g. 21 °C).

Press to set the temperature for do-

mestic hot water mode.

Press to set the temperature for heat-

ing mode.

Further settings for heating mode and do-

mestic hot water mode are described in

the relevant sections.

If the basic display is shown, press to

call up the menu.

The functions that are available in the

menu depend on whether a system control

is connected to the product. If you have

connected a system control, the settings

for heating mode must be available in the

system control. (→System control operat-

ing instructions)

You can find additional assistance for the

navigation under MAIN MENU →INFORM-

ATION →Menu introduction.

If there is an error message present, the

basic displays switches to the error mes-

sage.

Note

If a code request appears after you

press , your competent person

has locked access to the control

panel in order to prevent settings

from being accidentally changed.

Contact your competent person.

4.1.2 Operating levels

If the basic display is shown, call up the

menu in order to display the end user

level.

In the end user level, you can change

and individually adapt the settings for the

product. The table in the appendix lists the

menu items and setting options that can

be selected. (→Appendix A)

A timer is built into the boiler for the heat-

ing circuit but is only activated and vis-

ible with the use of a Vaillant sensoROOM

pure (VRT 50/2) control.

The installer level must only be operated

by persons with expertise and is therefore

protected by a code.

4.2 Setting the language

1. Press twice.

2. Navigate to the bottom menu item

(XXX) and confirm by pressing

3. Select the third menu item and con-

firm by pressing .

4. Select the first menu item and confirm

by pressing .

5. Select the required language and con-

firm by pressing .

10 Operating instructions 0020308119_02

4.3 Activating/deactivating the

button lock

1. Call up MAIN MENU →SETTINGS →

Button lock.

2. Confirm by pressing .

–The button lock is activated.

3. To deactivate the button lock, press

and hold for four seconds.

4.4 Heating mode

In heating mode, the rooms are heated up

in accordance with your settings.

4.4.1 Setting the flow temperature

Validity: Product without connected sensoROOM

pure (VRT 50/2) AND Product without system control

▶From the basic display, press .

◁The flow temperature that has

already been set is shown in the

display.

▶Set the desired flow temperature.

Validity: Product with connected sensoROOM pure

(VRT 50/2) OR Product with system control

▶Set the desired temperature on the

control or room temperature control;

see operating and installation instruc-

tions for the control or room temperat-

ure control.

4.4.2 Permanently switching off

heating mode (summer mode)

Validity: Product without connected sensoROOM

pure (VRT 50/2)

▶From the basic display, press for

at least three seconds.

◁Heating mode is switched off.

◁The symbol for heating mode

is shown as deactivated in the

display.

Validity: Product with connected sensoROOM pure

(VRT 50/2)

▶Set the lowest target room temperat-

ure on the room temperature control;

see operating and installation instruc-

tions for the room temperature con-

trol.

◁Heating mode is switched off.

Note

If the sensoROOM pure

(VRT 50/2) room temperature

control is connected, you

cannot set the desired temper-

ature on the product's control

panel.

4.5 DHW mode

Validity: Product with integrated hot water genera-

tion OR Product with connected domestic hot water

cylinder

In domestic hot water mode, the potable

water is heated to the required domestic

hot water temperature.

4.5.1 Setting the domestic hot water

temperature

1. From the basic display, press .

2. Set the required domestic hot water

temperature.

4.5.2 Switching off the domestic hot

water mode

Validity: Product with connected domestic hot wa-

ter cylinder OR Product with integrated hot water

generation and shift-load cylinder

▶Starting from the basic display, press

for at least five seconds.

◁The domestic hot water mode is

switched off.

4.5.3 Switching comfort mode

on/off

Note

Comfort mode keeps the domestic

hot water generation ready and

supplies hot water at the desired

temperature without you having to

wait for the heat-up time.

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