Manual Viessmann Vitodens 222-F - 2023 (page 54 of 68) (English)

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Operating instructions

for the system user

VIESMANN

Control unit with 7 inch touch display

VITODENS 200-W/222-W/222-F/242-F

5593212 GB 11/2023 Please keep safe.

Please follow these safety instruc-

tions closely to prevent accidents

and material losses.

Safety instructions explained

Danger

This symbol warns against the risk

of injury.

!Please note

This symbol warns against the risk

of material losses and environmen-

tal pollution.

Note

Details identified by the word "Note"

contain additional information.

Target group

These operating instructions are

designed for heating system users.

This appliance can also be operated by

children aged 8 and older, as well as by

individuals with reduced physical, sen-

sory or mental faculties or those lacking

in experience and knowledge, provided

such individuals are supervised or have

been instructed in the safe use of this

appliance and any risks arising from it.

!Please note

Supervise children in the proximity

of the appliance.

■Never permit children to play with

the appliance.

■Cleaning and user maintenance

must never be carried out by

unsupervised children.

Safety instructions for working on the system

Connecting the appliance

■The appliance may be connected and

commissioned only by authorised con-

tractors.

■Only operate the appliance with suita-

ble fuels.

■Observe the specified electrical con-

nection requirements.

■Modifications to the existing installation

may only be carried out by authorised

specialists.

Danger

Incorrectly executed work on the

heating system can lead to life

threatening accidents.

■Work on gas installations may

only be carried out by a registered

gas fitter.

■Work on electrical equipment may

only be carried out by a qualified

electrician.

Safety instructions

For your safety

5593212

Working on the appliance

■All settings and work on the appliance

must be performed as specified in

these operating instructions.

Further work on the appliance may be

carried out only by authorised contrac-

tors.

■Do not open the appliance.

■Do not remove casings.

■Do not modify or remove attachments

or fitted accessories.

■Do not open or tighten pipe connec-

tions.

Danger

Hot surfaces can cause burns.

■Do not open the appliance.

■Never touch the hot surfaces of

uninsulated pipes, fittings or flue

pipes.

Auxiliary components, spare and

wearing parts

!Please note

Components not tested with the

heating system may damage the

system or affect its function.

Have all installation or replacement

work carried out exclusively by your

contractor.

Safety instructions for operating the system

Damage to the appliance

Danger

Damaged equipment poses a

safety hazard.

Check the appliance for external

damage. Never start up a damaged

appliance.

If you smell gas

Danger

Escaping gas can lead to explo-

sions which may result in serious

injury.

■No smoking! Prevent naked

flames and sparks. Never switch

lights or electrical appliances on

or off.

■Close the gas shut-off valve.

■Open windows and doors.

■Evacuate any people from the

danger zone.

■Notify your gas and power supply

utility and your local heating con-

tractor from outside the building.

■Have the power supply to the

building shut off from a safe place

(outside the building).

Safety instructions

For your safety (cont.)

5593212

If you smell flue gas

Danger

Flue gas can lead to life threatening

poisoning.

■Shut down the heating system.

■Ventilate the installation site.

■Close all doors in the living space.

If there is a fire

Danger

Fire presents a risk of burns and

explosion.

■Shut down the heating system.

■Close the shut-off valves in the

fuel supply lines.

■Use a tested fire extinguisher,

class ABC.

If water escapes from the appliance

Danger

If water escapes from the appliance

there is a risk of electric shock.

■Shut down the heating system at

the external isolator (e.g. fuse

box, domestic distribution board).

■Please notify your contractor.

If the heating system develops a fault

Danger

Fault messages indicate faults in

the heating system. If faults are not

rectified, they can have life threat-

ening consequences.

Do not acknowledge fault mes-

sages several times in quick suc-

cession. Notify contractor so the

cause can be analysed and the

fault rectified.

Installation room requirements

Danger

Sealed vents result in a lack of

combustion air. This leads to incom-

plete combustion and the formation

of life threatening carbon monoxide.

Never cover or close existing vents.

Do not make any subsequent modi-

fications to the building characteris-

tics that could affect safe operation

(e.g. cable/pipework routing, clad-

ding or partitions).

Danger

Easily flammable liquids and mate-

rials (e.g. naphtha/petrol, solvents,

cleaning agents, paints or paper)

can cause deflagration and fire.

Never store or use such materials

in the boiler room or in direct prox-

imity to the heating system.

!Please note

Incorrect ambient conditions can

lead to heating system damage and

can put safe operation at risk.

■Maintain the permissible ambient

temperatures as detailed in these

operating instructions.

■Prevent air contamination by halo-

genated hydrocarbons (e.g. as

contained in paints, solvents or

cleaning fluids) and excessive

dust (e.g. through grinding/polish-

ing work).

■Avoid continuously high humidity

levels (e.g. through continuous

drying of washing).

Safety instructions

For your safety (cont.)

5593212

Extractors

The operation of appliances that extract

air to the outside (cooker hoods, extrac-

tors, air conditioning units, etc.) can cre-

ate negative pressure. If the boiler is

operated at the same time, this can lead

to a reverse flow of flue gas.

Danger

The simultaneous operation of the

boiler and appliances that extract

air to the outside can result in life

threatening poisoning due to a

reverse flow of flue gas.

Take suitable steps to ensure an

adequate supply of combustion air.

If necessary, contact your contrac-

tor.

Safety instructions

For your safety (cont.)

5593212

1. Liability ................................................................................................................ 9

2. Introductory information Symbols ................................................................................................. 10

Terminology ........................................................................................... 10

Intended use .......................................................................................... 11

Product information ................................................................................ 11

Permissible ambient temperatures in the installation room ................... 12

Licence information ................................................................................ 12

Type plate .............................................................................................. 12

Commissioning ...................................................................................... 12

Your system is preset ............................................................................ 12

Energy saving tips ................................................................................. 13

Tips for greater comfort ......................................................................... 14

3. Operation Operating principles ............................................................................... 15

■Status display with Lightguide ............................................................ 15

Screen displays ..................................................................................... 15

■Standby display .................................................................................. 15

■Default displays .................................................................................. 16

■Home screen ...................................................................................... 16

Buttons and symbols ............................................................................. 16

■Buttons and symbols in menu bar A ................................................. 17

■Buttons and symbols in function area B ........................................... 17

■Buttons and symbols in navigation area C ....................................... 17

Overview of the "Main menu" ............................................................... 18

■Menus available in the "Main menu" ................................................. 18

Operating program ................................................................................. 19

■Operating programs for central heating and DHW heating ................ 19

■Special operating programs and functions ......................................... 19

Procedure for setting a time program .................................................... 19

■Time programs and time phases ........................................................ 20

■Setting time phases ............................................................................ 20

■Copying the time program to other days of the week ......................... 21

■Changing time phases ........................................................................ 21

■Deleting time phases .......................................................................... 22

4. Default displays Default display "Heating circuit" or "Continuous operation" ............ 23

"DHW" default display ........................................................................... 23

"Energy cockpit" default display .......................................................... 23

■Calling up operating data for the solar thermal system ...................... 24

■Checking the temperatures in the DHW cylinder ................................ 25

■Calling up operating data for the heat generator ................................ 25

■Calling up the energy balance ............................................................ 26

"Favourites" default display ................................................................. 26

"System overview" default display ...................................................... 26

5. Central heating Heating circuit selection ......................................................................... 28

Setting the room temperature for a heating circuit ................................. 28

■Setting temperature levels for central heating .................................... 28

Switching central heating ON or OFF (operating program) ................... 28

Time program for central heating ........................................................... 29

■Setting a time program ....................................................................... 29

Setting the heating curve ....................................................................... 29

Temporarily adjusting the room temperature ......................................... 30

■Switching on "Extended heating" ..................................................... 30

■Switching off "Extended heating" ..................................................... 31

Adjusting the room temperature for longer periods at home ................. 31

■Switching on "Holidays at home" ................................................ 32

■Switching off "Holidays at home" ................................................ 32

Index

5593212

Saving energy during long periods of absence ..................................... 32

■Switching on the "Holiday program" ........................................... 32

■Switching off the "Holiday program" ........................................... 32

6. DHW heating DHW temperature .................................................................................. 34

Switching DHW heating on or off (operating program) .......................... 34

Time program for DHW heating ............................................................. 34

■Setting a time program ....................................................................... 34

■Setting a time program for the DHW comfort function ........................ 34

■Setting the time program for the DHW circulation pump .................... 35

One-off DHW heating outside the time program .................................... 35

■Switching on one-off DHW heating ..................................................... 35

■Switching off one-off DHW heating ..................................................... 35

Increased DHW hygiene ........................................................................ 35

■Switching on increased DHW hygiene ............................................... 36

■Switching off increased DHW hygiene ................................................ 36

Switching DHW scald protection on/off .................................................. 36

7. Further adjustments Disabling operation ................................................................................ 37

■Unlocking the controls ........................................................................ 37

■Changing the password for the "Lock panel" function ........................ 37

Setting the display brightness ................................................................ 37

Switching the Lightguide on and off ....................................................... 38

Entering names for heating circuits ....................................................... 38

Setting the "Time" and "Date" .............................................................. 38

Automatic "Summer/wintertime" changeover ..................................... 38

Setting the "Language" ........................................................................ 39

Setting "Units" ...................................................................................... 39

Entering the contractor's contact details ................................................ 39

Setting the home screen ........................................................................ 39

Setting the gross calorific value and gas volume correction factor for

consumption billing ................................................................................ 40

Switching on wireless connection to the remote control ........................ 40

Switching internet access on or off ........................................................ 40

■Switching WiFi on or off ...................................................................... 40

■Establishing a WiFi connection ........................................................... 41

■Static IP addressing ............................................................................ 41

Switching off the display screen for cleaning ......................................... 41

Restoring factory settings ...................................................................... 42

8. Checks Calling up help messages ...................................................................... 43

Checking information ............................................................................. 43

Checking licences for the integrated communication module ............... 43

■Switching on access point .................................................................. 43

■Calling up the license information for third party components ............ 43

■Third party software ............................................................................ 44

Checking service messages .................................................................. 44

■Calling up a service message ............................................................. 45

Checking fault messages ....................................................................... 45

■Calling up a fault message ................................................................. 45

■Resetting the burner after a burner fault ............................................. 45

Checking message lists ......................................................................... 46

9. Emissions test mode ................................................................................................................ 47

10. Start-up/shutdown Switching the system off ........................................................................ 48

■Shutting down heat generation with frost protection monitoring

("Standby mode") ............................................................................. 48

■Shutting down heat generation without frost protection monitoring .... 48

Switching on the system ........................................................................ 49

Index

5593212

11. What to do if... Rooms are too cold ................................................................................ 51

Rooms are too hot ................................................................................. 52

There is no hot water ............................................................................. 52

The DHW is too hot ............................................................................... 53

"Fault" is displayed ............................................................................... 53

ë and "Service" are displayed ............................................................ 53

"Panel locked" is displayed .................................................................. 53

"External hook-up" is displayed .......................................................... 53

12. Maintenance Cleaning ................................................................................................. 54

Inspection and maintenance .................................................................. 54

■Appliance ............................................................................................ 54

■DHW cylinder ...................................................................................... 54

■Safety valve (DHW cylinder) ............................................................... 54

■Potable water filter (if installed) .......................................................... 54

Damaged cables / lines ......................................................................... 54

13. Appendix Overview of "Main menu" ..................................................................... 55

Terminology ........................................................................................... 59

■Standby mode .................................................................................... 59

■Setback mode (reduced heating mode) ............................................. 59

■System version ................................................................................... 59

■Operating program ............................................................................. 59

■Operating status ................................................................................. 59

■Operating mode .................................................................................. 59

■Mixer extension kit .............................................................................. 59

■Screed drying ..................................................................................... 59

■Underfloor heating .............................................................................. 60

■Heating mode ..................................................................................... 60

■Heating curve ..................................................................................... 60

■Heating circuit ..................................................................................... 62

■Heating circuit pump ........................................................................... 62

■Mixer ................................................................................................... 62

■Night setback ...................................................................................... 63

■Open flue operation ............................................................................ 63

■Room sealed operation ...................................................................... 63

■Room temperature .............................................................................. 63

■Return temperature ............................................................................ 63

■Safety valve ........................................................................................ 63

■Solar circuit pump ............................................................................... 63

■Set temperature .................................................................................. 63

■Summer mode .................................................................................... 63

■Cylinder primary pump ....................................................................... 64

■Set temperature .................................................................................. 64

■Drinking water filter ............................................................................. 64

■Flow temperature ................................................................................ 64

■Weather-compensated operation ....................................................... 64

■Time program ..................................................................................... 64

■DHW circulation pump ........................................................................ 64

Information on disposal .......................................................................... 64

■Disposal of packaging ........................................................................ 64

■Final decommissioning and disposal of the heating system ............... 65

14. Keyword index ................................................................................................................ 66

Index

Index (cont.)

5593212

No liability is accepted for loss of profit, unattained

savings, or other direct or indirect consequential losses

resulting from use of the WiFi interface integrated into

the system or the corresponding internet services. No

liability is accepted for losses resulting from inappropri-

ate use.

Liability is limited to typical damage arising if a funda-

mental contractual obligation is violated through slight

negligence, the fulfilment of which is essential for

proper execution of the contract.

The limitation of liability shall not apply if the damage

was caused deliberately or through gross negligence,

or if mandatory liability applies due to product liability

legislation.

The Viessmann General Terms and Conditions apply,

which are included in each current Viessmann pricelist.

The relevant data protection regulations and terms of

use apply to the use of Viessmann apps. Viessmann

accepts no liability for push notifications and email

services, which are provided by network operators.

The terms and conditions of the respective network

operators therefore apply.

Liability

5593212

Symbol Meaning

Reference to other document containing

further information

Step in a diagram:

The numbers correspond to the order in

which the steps are carried out.

Warning of personal injury

Warning of material losses and environ-

mental pollution

Live electrical area

Pay particular attention.

■Component must audibly click into place.

■Acoustic signal

■Fit new component.

■In conjunction with a tool: Clean the sur-

face.

Dispose of component correctly.

Dispose of component at a suitable collec-

tion point. Do not dispose of component in

domestic waste.

Terminology

To provide you with a better understanding of the func-

tions of your control unit, some terminology is

explained. This information can be found in chapter

"Terminology" in the Appendix.

Introductory information

Symbols

5593212

The appliance is intended solely for installation and

operation in sealed unvented heating systems that

comply with EN 12828, with due attention paid to

CECS 215-2017 and the associated installation, serv-

ice and operating instructions. It is only designed for

heating up heating water that is of potable water qual-

ity.

Intended use presupposes that a fixed installation in

conjunction with permissible, system-specific compo-

nents has been carried out.

The appliance is intended exclusively for domestic or

semi-domestic use; even users who have not had any

instruction are able to operate the appliance safely.

Commercial or industrial usage for a purpose other

than heating the building or DHW shall be deemed

inappropriate.

Any usage beyond this must be approved by the man-

ufacturer in each individual case.

Incorrect usage or operation of the appliance (e.g. the

appliance being opened by the system user) is prohibi-

ted and will result in an exclusion of liability. Incorrect

usage also occurs if the components in the heating

system are modified from their intended use (e.g. if the

flue gas and ventilation air paths are sealed).

Product information

The control unit is a boiler and heating circuit control

unit for the following operating modes:

■Weather-compensated mode

■Continuous operation

■Room temperature-dependent mode

Your heating contractor will configure the operating

mode during commissioning in accordance with your

heating system. These instructions describe all 3 oper-

ating modes.

Weather-compensated mode

Fig. 1

In weather-compensated mode, the flow temperature

level is controlled according to the outside tempera-

ture. The lower the outside temperature, the higher the

flow temperature. This means that more heat is provi-

ded for central heating on cold days than on warmer

days.

In weather-compensated mode, 1 heating circuit with-

out mixer and up to 2 heating circuits with mixer can

be operated with the control unit.

Continuous operation

Fig. 2

In continuous operation, the heat generator provides

heating water with a constant flow temperature regard-

less of the outside temperature.

In continuous operation, 1 heating circuit without mixer

and up to 2 heating circuits with mixer can be operated

with the control unit.

Room temperature-dependent mode

Fig. 3

Introductory information

Intended use

5593212

In room temperature-dependent mode, the central

heating is switched on or off subject to the room tem-

perature. The flow temperature remains constant.

In room temperature-dependent mode, 1 heating cir-

cuit without mixer can be operated with the control

unit.

Operation

The control unit is integrated into the heat generator

and controls all functions of your system. The control

unit is operated via a 7 inch touchscreen.

A communication module is integrated in the control

unit. This means the system can also be operated

remotely via the internet with an app.

In weather-compensated mode you can select some

functions via a remote control; in room temperature-

dependent mode this is possible via a room tempera-

ture controller.

Permissible ambient temperatures in the installation room

!Please note

The appliance may develop faults if it is oper-

ated outside the specified temperature ranges.

Ensure that the specified temperature range is

maintained in the installation room.

To avoid malfunctions, ensure a temperature between

+5 and +40 °C.

Licence information

This product contains third party software, including

open source software. You are authorised to use this

third party software subject to compliance with the rel-

evant licensing terms.

■Licences for the integral communication module: See

page 43.

■Licences for the programming unit: See page 43.

Type plate

The type plate of the heat generator contains exten-

sive product information and an appliance-specific QR

code with the marking "i" for direct access to prod-

uct-specific information and product registration on the

internet.

The QR code contains the credentials for the registra-

tion and product information portal, and the 16-digit

serial number.

Commissioning

The commissioning and matching of the appliance to

local conditions and building characteristics, as well as

instructing the user in the operation of the system,

must be carried out by your contractor.

As the operator of new combustion equipment, you

may be obliged to notify the local flue gas inspector of

the installation without delay [check local regulations].

Your local flue gas inspector (where applicable) will

also provide you with information on additional activi-

ties concerning your combustion equipment (such as

regular testing, cleaning).

Your system is preset

Your heating system is preset at the factory and is

therefore ready for operation following commissioning

by your contractor:

Introductory information

Product information (cont.)

5593212

Central heating in weather-compensated mode

■Between 06:00 h and 22:00 h, rooms are heated to

20 °C "Room set temperature" (standard room

temperature).

■Between 22:00 h and 06:00 h, rooms are heated to

3 °C "Set reduced room temperature" (reduced

room temperature, frost protection).

Central heating in continuous operation

■Between 06:00 h and 22:00 h, the set flow tempera-

ture is 60 °C ("Set normal flow temperature")

■Between 22:00 h and 06:00 h the set flow tempera-

ture is 20 °C ("Reduced set flow temperature",

frost protection)

Central heating in room temperature-dependent

mode

■The rooms are heated in accordance with the set-

tings on your room temperature controller.

DHW heating

■Between 05:30 and 22:00 h, the DHW is heated to

50 °C "Set DHW temperature". Any installed DHW

circulation pump is switched on.

■Between 22:00 and 05:30, the DHW cylinder is not

reheated. Any installed DHW circulation pump is

switched off.

Note

Any DHW heating started before 22:00 remains on

until the set DHW temperature has been reached.

Frost protection

■Your heat generator and DHW cylinder (if installed)

are protected against frost.

Wintertime/summertime changeover

■This changeover is automatic.

Date and time

■The date and time were set by your heating contrac-

tor.

You can change the settings at any time to suit your

individual requirements.

Power failure

All settings are retained if there is a power failure.

Energy saving tips

Saving energy when using central heating

■Do not overheat your home. Every degree of room

temperature reduction saves up to 6 % on your heat-

ing bills.

Weather-compensated mode and room temperature-

dependent mode:

Do not set your standard room temperature ("Room

set temperature") to above 20 °C: See page 28.

■Heat your home to the reduced temperature at night

or during regular absences:

–Weather-compensated mode:

Reduced room temperature

–Continuous operation and room temperature-

dependent mode:

Reduced flow temperature

For this, adjust the settings in the time program for

central heating ("Time program, heating"): See

page 29.

In room temperature-dependent mode, time pro-

grams for central heating can only be set at the room

temperature controller.

Operating instructions for room temperature

controller

■To switch off functions that are not required (e.g.

central heating in summer), set the operating pro-

gram to "Standby mode" for the relevant heating

circuits: See page 28.

■Only for weather-compensated mode:

If you are going away, set the "Holiday program":

See page 32.

During the period that you are away, the room tem-

perature will be reduced and DHW heating switched

off.

Saving energy on DHW heating

■At night or during regular absences, heat the DHW to

a lower temperature. To do so, adjust the time pro-

gram for DHW heating: See page 34.

■Switch on DHW circulation only for those times in

which you regularly use hot water. For this, adjust

the time program for the DHW circulation pump: See

page 35.

For additional energy saving functions, please contact

your contractor.

Introductory information

Your system is preset (cont.)

5593212

More comfort in your home

■Set your individual preferred temperature: See

page 28.

■Adjust the time program for your heating circuits so

that your individual preferred temperature is auto-

matically reached when you are present: See

page 29.

In room temperature-dependent mode, time pro-

grams for central heating can only be set at the room

temperature controller.

■Only for weather-compensated mode:

Adjust the heating curves so that your home is

heated with your individual preferred temperature all

year round: See page 29.

■Only for weather-compensated mode and continuous

operation:

If you need a higher room temperature in the short

term, select the "Extended heating" function: See

page 30.

Example: Late in the evening, the reduced room

temperature is set by the time program. Your guests

stay longer.

■Only for weather-compensated mode:

If you are spending more time than usual in your

home, select the "Holidays at home" function:

See page 31

E.g. for public holidays or when the children are on

school holidays.

Sufficient DHW heating for your needs

■Adjust the time program for DHW heating so that

there is always sufficient hot water in accordance

with your habitual routines: See page 34.

Example: You need more DHW in the morning than

in the daytime.

■Adjust the time program for the DHW circulation

pump so that DHW is available immediately from the

taps during periods when hot water is drawn more

frequently: See page 35.

■If you need your DHW temperature to be higher for a

short while, select "One-off DHW heating outside the

time program": See page 35.

Introductory information

Tips for greater comfort

5593212

All your system settings can be made via the program-

ming unit, remote control units or other room tempera-

ture control devices and the ViCare app.

Touchscreen operation

The programming unit is equipped with a display. To

input settings and check information, tap the on-screen

buttons.

Operation via remote control units or room temper-

ature control devices

Separate operating instructions

Operation via ViCare app

The ViCare app allows you to operate your system via

a mobile device, e.g. smartphone.

Available functions depend on the system equipment

e.g. with/without ViCare components for individual

room control.

Check the following system requirements for operation

via the app:

■Viessmann system that can be connected via Vito-

connect or an integrated communications module.

■WiFi connection from router for control with internet

access

■Smartphone or tablet with operating system:

–iOS

–Android

Further information on using the ViCare app: See

www.vicare.info.

Status display with Lightguide

Dependent upon the heat generator, during operation

at the lower or upper edge of the programming unit, a

Lightguide is displayed.

Meaning of the display:

■Lightguide is illuminated constantly:

You are operating the control unit. Every input opera-

tion is confirmed by a brief flashing of the Lightguide.

■Lightguide flashes quickly:

There is a fault in the system.

■Lightguide pulsates slowly:

Display is in standby mode.

Note

You can turn off this function if you wish: See chapter

"Switching the Lightguide on and off".

Note

You can switch off the Lightguide. See page 38.

Screen displays

Standby display

If the controls have not been operated for some time,

the display initially switches to the standby display.

Fig. 4

After a few minutes, the illumination is switched off.

Operation

Operating principles

5593212

Default displays

The default displays provide access to the most impor-

tant settings and checks.

Use to choose between the following default dis-

plays:

■Heating circuit or Continuous operation

■DHW

■Energy cockpit

■Favourites

■System overview

For further information on the default displays: See

page 23 onwards.

Home screen

After switching on or activating the control unit the

home screen is shown.

In the delivered condition, the default display "Heating

circuit" or "Continuous operation" is shown as

home screen. The type of display depends on the

operating mode (weather-compensated mode, continu-

ous operation, room temperature-dependent mode).

You can specify a different default display for the home

screen: See page 39.

Call up the home screen as follows:

■Standby display active:

Tap anywhere on the screen.

■From the "Main menu":

Tap .

Note

You can prevent operation of the home screen: See

page 37.

If you do so, you will not be able to make adjustments

on either the home screen or the main menu.

"Panel locked" is displayed.

Buttons and symbols

Fig. 5 Example: Weather-compensated mode

AMenu bar

BFunction area

CNavigation area

Note

Some functions are not available in room temperature-

dependent mode. Where applicable, these functions

can be set on the room temperature controller, e.g.

time program for room heating.

Operation

Screen displays (cont.)

5593212

Buttons and symbols in menu bar A

Note

Not all buttons and symbols are available in room tem-

perature-dependent mode, for example the heating cir-

cuit selection.

Calls up the "Main menu".

"Heating circuit ..." Selects the heating circuit.

Note

This choice is only available if

there are several heating circuits

in your system.

System data:

■Date

■Time

Interfaces:

No data transfer

No WiFi connection

Establishing a connection

Communication error

WiFi connection is enabled (very low reception

quality).

WiFi connection is enabled (low reception qual-

ity).

WiFi connection is enabled (medium reception

quality).

WiFi connection is enabled (high reception qual-

ity).

Buttons and symbols in function area B

For buttons on the default displays: See page 23

onwards.

Note

■What buttons and symbols are available depends on

the operating mode: Weather-compensated mode,

continuous operation, room temperature-dependent

mode.

■These symbols are not always displayed, but appear

subject to the system version and the operating sta-

tus.

Symbols

Frost protection is active.

Central heating with reduced room temperature in

weather-compensated mode

Central heating with reduced flow temperature in

continuous operation or room temperature-depend-

ent mode

Central heating with standard room temperature in

weather-compensated mode

Central heating with standard flow temperature in

continuous operation or room temperature-depend-

ent mode

Only for weather-compensated mode and continu-

ous operation:

Central heating with comfort room temperature in

weather-compensated mode

Central heating with comfort flow temperature in

continuous operation

Only for weather-compensated mode and continu-

ous operation:

Holiday program is switched on.

Only for weather-compensated mode and continu-

ous operation:

Holidays at home is switched on.

Buttons and symbols in navigation area C

Note

What buttons and symbols are available depends on

the operating mode: Weather-compensated mode,

continuous operation, room temperature-dependent

mode

Takes you back to the home screen.

Takes you one step back in the menu.

Terminates an adjustment in progress.

WiFi is switched off: See page 40.

Confirms a change.

Makes changes in the menu.

Calls up the help text.

Calls up messages.

Calls up the required period for the energy bal-

ance.

Further information: See page 26.

Scrolls through the menu.

Switches to other display areas, e.g. to the "Sys-

tem overview".

Note

If "DEMO" is displayed in the navigation area, there is

no central heating, no DHW heating and no frost pro-

tection.

Operation

Buttons and symbols (cont.)

5593212

In the "Main menu", you can check and adjust all of

the settings for the control unit's range of functions.

Main menu

Heating

Settings

Test mode

Information

DHW

Holiday program

Fig. 6

Call up the "Main menu" as follows:

■If the screensaver is active:

Tap anywhere on the screen and then tap .

■From the home screen:

Tap .

■From anywhere in the menu:

Tap and then .

Menus available in the "Main menu"

Note

What buttons and symbols are available depends on

the operating mode: Weather-compensated mode,

continuous operation, room temperature-dependent

mode.

"Heating"

For more central heating settings, e.g. set temper-

ature values.

Further information: See page 28.

"Test mode"

For the flue gas inspector only

Further information: See page 47.

"DHW"

For DHW heating settings, e.g. for the "DHW

temperature".

Further information: See page 34.

"Settings"

For example the display setting

Further information: See page 37.

"Information"

For checking operating data

Further information: See page 43.

Only for weather-compensated mode and continu-

ous operation:

"Holiday program"

Energy saving function "Holiday program"

Further information: See page 32.

Only for weather-compensated mode and continu-

ous operation:

"Holidays at home"

"Holidays at home" function

Further information: See page 31.

"Message lists"

Calls up all pending messages

For further details about messages: See

page 44, 45 and 46.

"Service"

For contractors only

You can find the menu overview on page 55.

Operation

Overview of the "Main menu"

5593212

Operating programs for central heating and DHW heating

Note

The operating programs for central heating and DHW

heating can be set separately.

Symbol Operating program Function

Central heating

"Heating" The rooms of the selected heating circuit are heat-

ed in accordance with the specified room tempera-

ture or flow temperature and the time program (see

chapter "Central heating").

Note

In room temperature-dependent mode, a time pro-

gram for central heating can only be set at the

room temperature controller: See operating instruc-

tions for room temperature controller.

"Standby mode" ■No central heating

■Frost protection for the heat generator is active.

DHW heating

"DHW" "ON" DHW is heated in accordance with the DHW tem-

perature and time program specified (see chapter

"DHW heating").

"DHW" "OFF" ■No DHW heating

■Frost protection for the DHW cylinder is active.

Special operating programs and functions

■"Screed drying"

This function is activated by your contractor. Your

screed is dried in line with a set time program (tem-

perature/time profile) suitable for the relevant build-

ing materials. Your settings for central heating have

no effect on the duration of screed drying (max. 32

days). The system no longer provides DHW heating.

The "Screed drying" function can be altered or

switched off by your contractor.

■"External hook-up"

The operating program set at the control unit was

changed over by an external device, e.g. an EM-EA1

extension (DIO electronics module). The operating

program cannot be changed via the control unit for

as long as the external hook-up is enabled.

■Only for weather-compensated mode and continuous

operation:

"Holiday program": See page 32.

■Only for weather-compensated mode and continuous

operation:

"Holidays at home": See page 31.

Note

The special operating programs and functions are dis-

played alternately with the room temperature or the

flow temperature of the heat generator.

In the main menu, you can call up the set operating

program under "Information": See page 43.

Procedure for setting a time program

The following explains how to input the settings for a

time program. The specifics of the individual time pro-

grams can be found in the relevant chapters.

Operation

Operating program

5593212

Time programs and time phases

In the time programs you determine what your heating

system should do at what time. To do so, divide the

day into sections. These are called time phases. Dif-

ferent temperature levels are active within and outside

these time phases.

You can set up a time program for the following functions:

Function Temperature level

Within the time phase Outside the time phase

Central heating Weather-compensated mode:

Your rooms are heated with standard room

temperature or comfort room temperature.

Your rooms are heated with reduced room

temperature.

Continuous operation:

Your rooms are heated with standard flow

temperature or comfort flow temperature.

Your rooms are heated with reduced flow

temperature.

Room temperature-dependent mode:

A time program for central heating can only be set at the room temperature controller.

Operating instructions for room temperature controller

DHW heating DHW heating is switched on.

The water in the DHW cylinder is heated to

the set DHW temperature.

DHW heating is switched off.

DHW circulation

pump

The DHW circulation pump is switched on. The DHW circulation pump is switched off.

■The time programs can be set individually to be the

same, or different, for every day of the week.

■In the main menu, you can check the time programs

under "Information": See page 43 onwards.

Setting time phases

The procedure is explained using the example of cen-

tral heating for heating circuit 1 in weather-compensa-

ted mode.

You can set up to 4 time phases in each "Time pro-

gram".

For each time phase, you define the start point "Start"

and the end point "End".

Example:

"Time program" for "Monday" for "Heating circuit

■Time phase 1:

06:30 to 12:00 with the normal room temperature

■Time phase 2:

15:00 to 20:00 with comfort room temperature

In between these time phases the system heats to a

reduced temperature.

Tap the following buttons:

01. "Heating circuit 1 " in the menu bar

02.

03. "Mo"

04.

05. for the "Start" and "End" of time phase 1.

The bar in the time chart is adjusted.

06. "Normal" to select standard room temperature.

07. to add time phase 2.

Operation

Procedure for setting a time program (cont.)

5593212

08. for the "Start" and "End" of time phase 2.

Fig. 7

The bars in the time chart are adjusted.

09. "Comfort" to select comfort room temperature.

10. to confirm

11. to quit the "Time program".

Copying the time program to other days of the week

The procedure is explained using the example of cen-

tral heating for heating circuit 1 in weather-compensa-

ted mode.

The procedure is explained using the example of cen-

tral heating for heating circuit 1.

Example:

You want to copy the "Monday" "Time program" over

to "Thursday" and "Friday".

Tap the following on-screen buttons:

1. "Heating circuit 1 " in the menu bar

3. "Mo"

5. "Th", "Fr"

6. to confirm

7. to quit the time program.

Changing time phases

The procedure is explained using the example of cen-

tral heating for heating circuit 1 in weather-compensa-

ted mode.

The procedure is explained using the example of cen-

tral heating for heating circuit 1.

Example:

For "Monday", you want to change the start point

"Start"of time phase 2 to 19:00 h.

Tap the following on-screen buttons:

1. "Heating circuit 1 " in the menu bar

3. "Mo"

5. for time phase 2

6. for the start point of time phase 2.

The bar in the time diagram is adjusted.

7. ■ "Normal" for standard room temperature

■ "Comfort" for comfort room temperature

8. to confirm

9. to quit the time program.

Operation

Procedure for setting a time program (cont.)

5593212

Deleting time phases

The procedure is explained using the example of cen-

tral heating for heating circuit 1 in weather-compensa-

ted mode.

The procedure is explained using the example of cen-

tral heating for heating circuit 1.

Example:

For Monday you want to delete time phase 2.

Tap the following on-screen buttons:

1. "Heating circuit 1 " in the menu bar

3. "Mo" to select the required day

5. for time phase 2

6. to delete the time phase.

7. to confirm

8. to quit the time program.

Operation

Procedure for setting a time program (cont.)

5593212

In the "Heating circuit" or "Continuous operation"

default display, you can adjust and check the most fre-

quently used settings:

Raises the room temperature value in weather-

compensated mode.

Raises the set flow temperature value in continu-

ous operation or room temperature-dependent

mode.

Lowers the room temperature value in weather-

compensated mode.

Lowers the set flow temperature value in continu-

ous operation or room temperature-dependent

mode.

Sets the "Heating" operating program for a heat-

ing circuit.

To select "Standby mode".

Only for weather-compensated mode and continu-

ous operation:

To switch the "Extended heating" function on or

off.

Only for weather-compensated mode and continu-

ous operation:

To call up the "Time program, heating" for central

heating.

The temperature display represents the selected set

room temperature (e.g. 20 °C) or set flow temperature

(e.g. 60 °C) for the current time phase.

"DHW" default display

DHW

Set DHW temperature

°C

Fig. 8

In the "DHW" default display you can carry out the set-

tings and checks you use most frequently:

Raises the DHW temperature value.

Lowers the DHW temperature value.

Turns "DHW" "ON"

/"DHW" "OFF".

Calls up the "Time program, DHW".

Switches one-off DHW heating on.

Note

It is not possible to end "one-off DHW heating"

sooner.

"Energy cockpit" default display

When you call up the Energy cockpit for the first time,

a notification appears.

■The Energy cockpit is opened once you confirm this

notification with . The information is not shown

again when the energy cockpit is subsequently

called up.

■If you tap on Cancel, the notification will appear

again the next time you call up the Energy cockpit.

Default displays

Default display "Heating circuit" or "Continuous operation"

5593212

Energy cockpit

60 °C 50 °C 70 °C

A B C D

GEF

Fig. 9

ASolar collector with collector temperature

BDHW temperature

CDHW cylinder

DBoiler with flow temperature

EDHW cylinder heating by the boiler is active

(arrow)

FDHW cylinder heating by the solar thermal system

is active (arrow)

GEnergy balance checking

The "Energy cockpit" provides you with clear infor-

mation on the energy state of your heating system.

The various components present in the system are

shown as graphics. Some information on the compo-

nents is also provided in the default display. For more

information, tap on the relevant component.

What buttons and symbols are available depends on

the system version.

The "Energy cockpit" default display enables you to

check the following information:

To call up the operating data for the solar thermal

system.

Further information: See page 24.

To call up the temperatures in the DHW cylinder.

Further information: See page 25.

To call up the operating data for the heat genera-

tor.

Further information: See page 25.

Checks the energy balance.

Further information: See page 26.

Symbol is animated:

Heating of the DHW cylinder by the solar thermal

system or the heat generator is enabled.

Calling up operating data for the solar thermal system

You can call up the following operating data:

■Solar energy yield (Solar energy bar chart): See the

following chapter

■Total solar energy generated

■Solar circuit pump operating time

■Solar circuit pump operating state

■Reheating suppression

■Solar stagnation

■Solar circulation pump

■TS3: Buffer temperature

■TS4: Return temperature, heating circuit

■Solar central heating backup

■TS3: DHW preheating

Tap the following buttons:

1. If applicable, for the "Energy cockpit"

default display

3. for the required check

Calling up the solar energy yield

You can call up the amount of energy generated by

your solar thermal system. Values are shown in kilo-

watt hours.

Tap the following buttons:

1. If applicable, for the "Energy cockpit"

default display

3. on "Solar energy bar chart"

4. Required period :

■Current month

■Last month

■Current year

■Last year

The solar energy yield is displayed as a chart with

bars.

5. Required period in chart: Day of the week or month

The solar energy yield for the selected period is

displayed numerically.

Default displays

"Energy cockpit" default display (cont.)

5593212

Checking the temperatures in the DHW cylinder

You can carry out the following checks and functions

for the DHW cylinder:

■DHW temperatures

■Start one-off DHW heating (only if DHW heating isn't

enabled in the current operating program).

Tap the following buttons:

1. If applicable, for the "Energy cockpit"

default display

Starting one-off DHW heating

Tap the following on-screen buttons:

1. If applicable, for the "Energy cockpit"

default display

3. to start one-off DHW heating by the heat genera-

tor.

The DHW cylinder is heated to the DHW set tem-

perature.

Note

It is not possible to end "one-off DHW heating"

sooner.

4. to confirm

Calling up operating data for the heat generator

You can call up the following operating data:

■Current output

■Hours run

■Burner runtime

■Burner starts

■Power consumption:

–Power consumed today

–Power consumed last 7 days

–Power consumed this month

–Power consumed last month

–Power consumed this year

–Power consumed last year

■Gas condensing boiler fuel consumption:

–Gas consumption today

–Gas consumption last 7 days

–Gas consumption this month

–Gas consumption last month

–Gas consumption history:

–Current month

–Last month

–Current year

–Last year

Tap the following buttons:

1. If applicable, for the "Energy cockpit"

default display

3. for the required check

Note

The consumption figures displayed are not based on

metering equipment but instead are computed values.

The calculation takes into account the existing system

components and the user behaviour (e.g. operating

time and utilisation level). Depending on system-spe-

cific parameters (e.g. installation altitude and type of

flue system), differences may arise between the dis-

played (computed) and actual consumption values.

Due to seasonal climate conditions and other factors,

further discrepancies are possible. The value display

serves to visualise the energy flow to date, as well as

any consumption increases or decreases in relation to

specific comparative periods. It cannot be used as a

binding basis for billing.

Calling up the fuel consumption history

You can call up the fuel consumption as a chart. Val-

ues are shown in cubic metres.

Tap the following buttons:

1. If applicable, for the "Energy cockpit"

default display

3. For example in "Gas consumption history"

Default displays

"Energy cockpit" default display (cont.)

5593212

4. Required period :

■Current month

■Last month

■Current year

■Last year

Gas consumption is shown as a chart.

■The gas consumption for central heating is

shown in a dark shade.

■The gas consumption for DHW heating is shown

in a light shade.

5. Required period in chart: Day of the week or month

The gas consumption for central heating or DHW

heating during the selected period is displayed

numerically.

Calling up the energy balance

In conjunction with a solar thermal system, you can

call up the current situation regarding solar energy

yield and fuel consumption.

Tap the following buttons:

1. If applicable, for the "Energy cockpit"

default display

2. .

3. Required period :

■Current month

■Last month

■Current year

■Last year

The energy balance is displayed as a graphic.

kWh

172

344

Fig. 10

Fuel consumption

Solar yield

"Favourites" default display

In the "Favourites" default display you can call up

your own preferred menus.

You can add a maximum of 12 menus to Favourites.

You can change the selection at any time.

Labelling menus as favourites

Tap the following buttons:

1. for the "Favourites" default display

The list of menus available for selection is shown.

3. for all preferred menus

The selection is indicated by .

4. to confirm

"System overview" default display

What information is available depends on the operat-

ing mode: Weather-compensated mode, continuous

operation, room temperature-dependent mode.

Default displays

"Energy cockpit" default display (cont.)

5593212

Subject to your system equipment and the settings that

have been made, you can check the following current

system data on the "System overview" default dis-

play:

■"System pressure"

■"Heat generator" group:

–Burner ON/OFF

–Heat generator flow temperature

■"General" group:

Only for weather-compensated mode:

Outside temperature

■"Heating circuit ..." group:

Flow temperature, heating circuit

Note

If names have been given to the heating circuits, the

allocated name is shown: See chapter "Entering

names for heating circuits".

■"DHW" group:

DHW temperature

■"Internet" group:

ON/OFF

■"Solar energy" group:

Collector temperature

–Solar circuit pump ON/OFF

–Collector temperature

Tap the following buttons:

1. If applicable, for the "System overview"

default display

2. Checking other information:

for other system data in the relevant group.

to call up the "Information" menu: See

page 43.

Note

Detailed options for checking the individual groups can

be found in chapter "Menu overview".

Default displays

"System overview" default display (cont.)

5593212

Note

In room temperature-dependent mode, only one heat-

ing circuit can be operated with the control unit. For

this reason, heating circuit selection is not available.

If required, the heating of your interior can be split over

several heating circuits.

E.g., one heating circuit for your home, and one heat-

ing circuit for your office.

In the menu bar, the heating circuits are designated at

the factory as "Heating circuit 1", "Heating circuit 2"

etc. If names have been given to the heating circuits,

the allocated name is shown: See chapter "Naming

heating circuits".

■For all central heating settings for heating systems

with several heating circuits, first select the heating

circuit that you want to change from the "Heating

circuit" default display.

■If you are only operating one heating circuit, this

option is not available.

Tap the following on-screen buttons:

1. If applicable, for the "Heating circuit" default

display

2. "Heating circuit 1 " in the menu bar

3. Required heating circuit

Setting the room temperature for a heating circuit

Factory settings for the temperature levels

Weather-compensated mode:

■Standard room temperature: 20 °C

■Reduced room temperature: 3 °C

■Comfort room temperature: 20 °C

Continuous operation and room temperature-depend-

ent mode:

■Standard flow temperature: 60 °C

■Reduced flow temperature: 20 °C

■Only for continuous operation

Comfort flow temperature: 70 °C

Continuous operation and room temperature-

dependent mode

Only change the set values for the flow temperature if

the heat supply for central heating is insufficient.

Setting temperature levels for central heating

Note

In room temperature-dependent mode, set the

required temperature at your room temperature con-

troller.

Tap the following buttons:

1. If applicable, for the "Heating circuit" or

"Continuous operation" default display

2. If applicable, in the menu bar for the required

heating circuit

3. for the required value of the relevant tempera-

ture level:

■ "Reduced"

■ "Normal"

■ "Comfort"

4. to confirm

Switching central heating ON or OFF (operating program)

For information on the operating programs, see

page 19.

Central heating

Heating circuit selection

5593212

Tap the following on-screen buttons:

1. If applicable, for the "Heating circuit" or

"Continuous operation" default display

2. If applicable, in the menu bar for the relevant

heating circuit

or select another submenu for heating circuit and

DHW.

3. Highlighted button , or .

4. ■ "Heating" if you want to start central heat-

ing.

■ "DHW" if you want to start DHW heating.

■ "Standby mode" if you want to stop central

heating or DHW heating.

5. to confirm

Time program for central heating

Note

In room temperature-dependent mode, a time program

for central heating can only be set at the room temper-

ature controller: See operating instructions for room

temperature controller.

Setting a time program

Factory settings: One time phase from 06:00 to 22:00

for every day of the week

Tap the following on-screen buttons:

1. If applicable, for the "Heating circuit" default

display

2. If applicable, in the menu bar for the relevant

heating circuit

4. Required day of the week

6. Depending on the required change:

to change the time phase

for a new time phase

to delete a time phase

to select the time phase if more than one

time phase is set.

Note

When adjusting the setting, bear in mind that your sys-

tem requires some time to heat the rooms to the

required temperature.

To continue: See page 19.

Setting the heating curve

Fig. 11

Note

The heating curve can only be adjusted in weather-

compensated mode.

By setting the "Heating curve", you influence the flow

temperature provided by the heat generator.

To ensure your rooms are heated optimally at any out-

side temperature, you can adjust the "Level" and

"Slope" of the "Heating curve".

Central heating

Switching central heating ON or OFF (operating… (cont.)

5593212

Factory settings:

■"Slope": 1.4

■"Level": 0

Tap the following on-screen buttons:

2. "Heating"

3. Required heating circuit, e.g. "Heating circuit

4. "Heating curve"

5. for the required value for "Slope" and

"Level" respectively

The graph displayed clearly shows the change in

the "Heating curve" as soon as you alter the

value for the "Slope" or "Level".

6. to confirm

Tips for setting the "Heating curve"

Room temperature behaviour Remedy

The home is too cold during the winter. Set the "Slope" to the next level up.

The home is too warm during the winter. Set the "Slope" to the next level down.

The home is too cold during the spring/autumn and win-

ter.

Set the "Level" to a higher value.

The home is too warm during the spring/autumn and

winter.

Set the "Level" to a lower value.

The home is too cold during the spring/autumn but

warm enough during the winter.

Set the "Slope" to the next level down and "Level" to

a higher value.

The home is too warm during the spring/autumn but

warm enough during the winter.

Set the "Slope" to the next level up and "Level" to a

lower value.

Temporarily adjusting the room temperature

Note

Only for weather-compensated mode and continuous

operation.

Switch on the "Extended heating" function if you

want to heat your home with standard room tempera-

ture/flow temperature or comfort room tempera-

ture/flow temperature during a time phase with

reduced room temperature.

Your home will be heated with the temperature of the

last active time phase for standard room temperature/

flow temperature or comfort room temperature/flow

temperature.

Note

DHW heating is enabled during the "Extended heat-

ing" function:

If the DHW temperature is below the set DHW value,

the DHW cylinder is heated first, then the rooms are

heated.

Switching on "Extended heating"

Tap the following buttons:

1. If applicable, in the menu bar for the required

heating circuit

The temperature of the last active time phase for

the standard room temperature/flow temperature or

comfort room temperature/flow temperature will be

selected.

Central heating

Setting the heating curve (cont.)

5593212

Switching off "Extended heating"

The function ends automatically when switching to the

next time phase for the standard room temperature/

flow temperature or comfort room temperature/flow

temperature.

Tap the following buttons to terminate "Extended

heating" early:

1. If applicable, in the menu bar for the required

heating circuit

Adjusting the room temperature for longer periods at home

Note

Only for weather-compensated mode and continuous

operation.

If you are continuously at home for one or more days

but do not want to change the time program, select the

function "Holidays at home" , e.g. on public holi-

days or when the children are on school holidays.

The "Holidays at home" function has the following

effects:

■The room temperature during the periods between

the set time phases is raised to the set value of the

first time phase of the day: From reduced room tem-

perature to standard room temperature or comfort

room temperature.

■If no time phase is active before 0:00, your rooms

are heated to the reduced room temperature until the

next time phase becomes active.

■DHW heating is active.

■The "Holidays at home" function starts and ends

according to the set times for the start date and end

date.

Note

■As long as the "Holidays at home" function is

switched on, the default display shows "Holidays at

home" and the set start date and end date.

■If "Detached house" was selected by your contrac-

tor during commissioning, the function is adopted for

all heating circuits.

Example

For Monday and Tuesday, 2 time phases are set

respectively.

0 2 4 6 8 10 12 14 16 18 20 22 24

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

0 2 4 6 8 10 12 14 16 18 20 22 24

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

A B C C B

A B C

Fig. 12

Temperature levels in line with the set time pro-

gram

Temperature level if "Holidays at home" is active

AReduced room temperature

BStandard room temperature

CComfort room temperature

Central heating

Temporarily adjusting the room temperature (cont.)

5593212

Switching on "Holidays at home"

Tap the following buttons:

2. "Holidays at home"

3. Use to select the required heating circuit

4. for "Start" and "End"

5. to confirm

Switching off "Holidays at home"

Tap the following buttons:

2. "Holidays at home"

3. Use to select the required heating circuit

Saving energy during long periods of absence

Note

Only for weather-compensated mode and continuous

operation.

To save energy during long periods of absence, select

"Holiday program" .

The holiday program has the following effects:

■Central heating:

–For heating circuits in the "Heating" operating

program:

The rooms are heated to the set reduced room

temperature.

–For heating circuits in the "Standby mode"

operating program:

No central heating: Frost protection for the heat

generator and the DHW cylinder is enabled.

■DHW heating:

No DHW heating; frost protection for the DHW cylin-

der is enabled.

■The holiday program starts at 00:00 h on the first day

of your holiday and ends at 23:59 h on the final day.

Note

■As long as the "Holiday program" function is

switched on, the selected first and last day of the hol-

iday are shown in the "Heating circuit" and "Holi-

day program" default display.

■If "Detached house" was selected by your contrac-

tor during commissioning, the holiday program is

switched on for all heating circuits.

■If "Apartment building" was selected by your con-

tractor during commissioning, DHW heating will only

be switched off if all heating circuits are in the holi-

day program.

Switching on the "Holiday program"

Tap the following on-screen buttons:

2. "Holiday program"

3. Use to select the required heating circuit

4. for "First day of holiday" and "Last day

of holiday"

5. to confirm

Switching off the "Holiday program"

Tap the following on-screen buttons:

2. "Holiday program"

3. Use to select the required heating circuit

Central heating

Adjusting the room temperature for longer… (cont.)

5593212

Central heating

Saving energy during long periods of absence (cont.)

5593212

Factory settings: 50 °C

Note

For reasons of good hygiene, you should not set the

DHW temperature lower than 50 °C.

Tap the following buttons:

1. for the "DHW" default display

2. for the required value

3. to confirm

Switching DHW heating on or off (operating program)

If you switch off DHW heating, no water can be

heated. This also applies for the function "One-off

DHW heating outside the time program".

Tap the following on-screen buttons:

1. If applicable, for the "DHW" default display

2. Highlighted button or

3. ■ "ON" if you want to start DHW heating.

■ "OFF" if you want to stop DHW heating.

For information on the operating program: See

page 19.

Time program for DHW heating

Setting a time program

Factory settings: 05:30 to 22:00

You can change the time program individually in

accordance with your requirements.

Tap the following on-screen buttons:

1. If applicable, for the "DHW" default display

3. Required day of the week

5. Depending on the required change:

to change the time phase

for a new time phase

to delete a time phase.

to select the time phase if more than one

time phase is set.

Note

■The DHW is not heated between the time phases.

Frost protection for the DHW cylinder is enabled.

■When setting time programs, bear in mind that your

system requires some time to heat the DHW cylinder

to the required temperature.

To continue: See page 19.

Setting a time program for the DHW comfort function

(Function only for combi boilers with plate heat

exchanger for DHW heating)

Factory settings: 05:30 to 22:00 h

Note

With a "Combi boiler", the "DHW comfort function" is

active during the set time phases (plate heat

exchanger is kept at temperature).

The time phases need to be deleted to switch off the

comfort function.

DHW heating

DHW temperature

5593212

You can change the time program for the comfort func-

tion individually in accordance with your require-

ments.

Tap the following on-screen buttons:

1. If applicable, for the "DHW" default display

3. Required day of the week

5. Depending on the required change:

to change the time phase

for a new time phase

to delete a time phase.

to select the time phase if more than one

time phase is set.

Setting the time program for the DHW circulation pump

You can change the time program individually in

accordance with your requirements.

Tap the following on-screen buttons:

2. "DHW"

3. "Time program, DHW circulation"

4. Select day of week.

6. Depending on the required change:

■ to change the time phase

■ for a new time phase

■ to delete a time phase.

■ to select the time phase if more than one

time phase is set.

Note

Between the time phases the DHW circulation pump

remains off.

To continue: See page 19.

One-off DHW heating outside the time program

If you require hot water outside the set time phases,

switch on "One-off DHW heating" .

The DHW cylinder is heated once to the set DHW tem-

perature.

This function has a higher priority than other functions

for DHW heating, such as the time program.

Switching on one-off DHW heating

Tap the following on-screen buttons:

1. If applicable, for the "DHW", "Energy cock-

pit" or "Favourites" default display

3. to confirm

Switching off one-off DHW heating

"One-off DHW heating" ends as soon as the set

DHW temperature has been reached.

Note

It is not possible to stop DHW heating sooner!

Increased DHW hygiene

You can heat the water in the DHW cylinder to above

60 °C once a week or for an hour every day. This func-

tion is regularly carried out at the specified time.

Danger

High DHW temperatures can cause scalding,

e.g. if the DHW temperature is above 60 °C.

Mix with cold water at the draw-off points.

DHW heating

Time program for DHW heating (cont.)

5593212

Switching on increased DHW hygiene

Tap the following buttons:

2. "DHW"

3. "Hygiene function"

4. for the starting time "Start"

5. Select the required day or "Daily"

The selection is highlighted.

6. to confirm

Switching off increased DHW hygiene

Tap the following buttons:

2. "DHW"

3. "Hygiene function"

4. Deselect the day or "Daily"

5. to confirm

Switching DHW scald protection on/off

Tap the following buttons:

2. "DHW"

3. "Scald protection"

4. "On" or "Off"

5. to confirm

Note

With scald protection switched off, a set DHW temper-

ature of over 60 °C can be selected, depending on the

heat generator. There is an increased risk of scalding!

DHW heating

Increased DHW hygiene (cont.)

5593212

You can lock the controls in 2 steps:

Stage 1 All functions on the default displays are oper-

able. Emissions test mode can be switched

on. Message lists are displayed.

All other functions are disabled.

Stage 2 All functions are disabled. Emissions test

mode can be switched on.

Tap the following on-screen buttons:

2. "Settings"

3. "Lock panel"

4. "Lock everything"

"Only home screen operable"

5. Enter the password "viessmann".

6. to confirm

The password can be changed: See page 37.

Unlocking the controls

Tap the following on-screen buttons:

1. Any on-screen button

"Panel locked" is displayed.

"Do you want to unlock the operation?" is dis-

played.

An entry field and keyboard appear.

4. Enter the password "viessmann" or the password

you have specified.

5. to confirm

Changing the password for the "Lock panel" function

Tap the following on-screen buttons:

2. "Settings"

3. "Change password"

4. Enter the current password.

5. to confirm

6. Enter the new password (1 to 20 characters).

Note

You will not be required to confirm the new pass-

word.

7. to confirm

Information is displayed.

8. to confirm the note

Setting the display brightness

You can adjust the display brightness for operation and

for standby separately.

Tap the following buttons:

2. "Settings"

3. "Display setting"

4. "Brightness, operation"

"Brightness, standby"

5. for the required value

6. to confirm

Further adjustments

Disabling operation

5593212

Dependent upon the design of the heat generator, at

the lower or upper edge of the control unit, a Light-

guide is displayed.

With various displays, the Lightguide explains the func-

tions of the control unit.

Meaning of the display:

■Lightguide is illuminated constantly:

You are operating the control unit. Every input opera-

tion is confirmed by a brief flashing.

■Lightguide flashes quickly:

There is a fault in the system.

■Lightguide pulsates slowly:

Display is in standby mode.

You can switch this function on or off as you wish.

Tap the following buttons:

2. "Settings"

3. "Lightguide standby mode"

4. "ON"

"OFF"

5. to confirm

Entering names for heating circuits

Note

Only for weather-compensated mode and continuous

operation.

You can name all heating circuits individually, e.g.

"Ground floor".

Note

The abbreviations 1, 2, 3, 4 will be retained in the

default display.

Tap the following on-screen buttons:

2. "Settings"

3. "Rename heating circuits"

4. Required heating circuit, e.g. "Heating circuit

5. Type in the required name, e.g. "Ground floor" (1 to

20 characters).

6. to confirm

The name assigned to the relevant heating circuit is

shown in the main menu.

Setting the "Time" and "Date"

The "Time" and "Date" are set at the factory. If your

system has been shut down for a prolonged period,

you may need to reset the "Time" and "Date".

Tap the following buttons:

2. "Settings"

3. "Date and time"

4. "Date"

"Time"

5. for the required value

6. to confirm

Automatic "Summer/wintertime" changeover

The automatic changeover from summer/wintertime is

factory-set.

In this menu you can switch the changeover from sum-

mer/wintertime on and off.

Tap the following buttons:

2. "Settings"

3. "Date and time"

4. "Time changeover"

5. for "ON" or "OFF"

Further adjustments

Switching the Lightguide on and off

5593212

6. to confirm

Setting the "Language"

Your contractor will have set the display language dur-

ing commissioning. You can change the language.

Tap the following on-screen buttons:

2. "Settings"

3. "Language"

4. Required language

5. to confirm

Setting "Units"

You can adjust all available units, e.g. for the tempera-

ture, date, pressure, etc.

Tap the following buttons:

2. "Settings"

3. "Units"

4. Select e.g. °C for the temperature.

5. to confirm

Entering the contractor's contact details

You can enter your contractor's contact details. These

can then be called up in the "Information" menu.

Tap the following on-screen buttons:

2. "Information"

3. "Contractor contact details"

4. Relevant entry field

5. Enter your contractor’s contact details into the indi-

vidual boxes.

6. to confirm

Setting the home screen

Note

Which default displays are available depends on the

operating mode: Weather-compensated mode, contin-

uous operation, room temperature-dependent mode.

You can choose from the following default displays as

your home screen:

■"Heating circuit" or "Continuous operation"

■"DHW"

■"System overview"

■"Energy cockpit"

■"Favourites"

Tap the following on-screen buttons:

2. "Settings"

3. "Selecting the default display"

4. Required display

5. to confirm

Note

Tap on to call up the selected home screen.

Further adjustments

Automatic "Summer/wintertime" changeover (cont.)

5593212

Tap the following buttons:

2. "Settings"

3. "Energy cockpit"

4. Select gross calorific value or gas volume correc-

tion factor

5. Enter value

6. to confirm

Note

The value can be found on the gas bill. The values

entered are used to help calculate the gas consump-

tion.

Switching on wireless connection to the remote control

Note

Low power radio is a wireless connection for data

transfer, e.g. via a remote control unit.

Your heating contractor can connect your heat genera-

tor with Viessmann accessories via low power radio.

With weather-compensated mode, you can connect

your remote control to the control unit for wireless data

transfer via low power radio.

Tap the following on-screen buttons:

2. "Settings"

3. "Low power radio ON/OFF"

4. "ON"

5. to confirm

Note

The low power radio credentials can be called up in

the service menu under menu point "Diagnosis"/"RF

module": RF module "IC" and "EUI-64"

See installation/service instructions

Switching internet access on or off

You can control your system remotely via the internet

using an app. To do this, establish an internet connec-

tion via WiFi (2.4 gigahertz): See the following chapter.

The required credentials for internet access to the con-

trol unit via app can be found on the adjacent label:

Switching WiFi on or off

Tap the following on-screen buttons:

2. "Settings"

3. "Internet"

4. "WiFi operating mode"

5. "OFF" if you want to switch off the WiFi.

"Internet" if you want to switch on the WiFi.

6. to confirm

Further adjustments

Setting the gross calorific value and gas volume correction factor for consumption billing

5593212

Establishing a WiFi connection

Note

Prerequisite: WiFi is switched on.

Tap the following on-screen buttons:

2. "Settings"

3. "Internet"

4. "Network selection"

■Available WiFi networks are displayed.

Note

If a connection as already exists, "Connected"

is shown next to the relevant network.

■If you want to use an invisible WiFi network:

Tap on and enter the name of WiFi (SSID)

and the password.

5. Select WiFi.

Note

Use to refresh the list of available WiFi net-

works.

6. to confirm

7. If your selected WiFi is not protected :

to acknowledge the connection message

If your selected WiFi is protected :

Enter the password (maximum 40 characters).

to confirm your password

8. to acknowledge the information regarding inter-

net use

The default display shows .

Note

■If the connection was not established, an error

message is shown.

■An internet connection only exists if the selected

WiFi is connected to the internet. Check your

WiFi settings if required.

Static IP addressing

Prerequisite: Your WiFi is configured so that the sub-

scriber addresses in the network (IP addresses) are

not automatically assigned.

Tap the following on-screen buttons:

01.

02. "Settings"

03. "Internet"

04. "Network selection"

05. Available WiFi networks are displayed.

Note

Tap to refresh the list of available WiFi net-

works.

06. Select the network.

07.

08. "STATIC" for static IP addressing

09. to confirm

10. Enter network data:

■IP address

■Subnet mask

■Standard gateway

■Primary DNS server

■Secondary DNS server

11. to confirm

Note

An internet connection only exists if the selected WiFi

is connected to the internet. Check your WiFi settings

if required.

Switching off the display screen for cleaning

If you want to clean the display screen, you can deacti-

vate it for 30 seconds. This prevents unintentional

operation.

Clean the display with a microfibre cloth.

Further adjustments

Switching internet access on or off (cont.)

5593212

Tap the following on-screen buttons:

2. "Settings"

3. "Clean screen"

The display is deactivated. A countdown begins.

Restoring factory settings

You can reset all entries and values to their factory set-

tings.

Note

If the heating circuits have been given names, the

assigned names will be retained: See page 38.

Settings and values that are reset with all operating

modes:

■Standard room temperature or standard flow temper-

ature

■Reduced room temperature or reduced flow temper-

ature

■Operating program

■DHW temperature

■Time program for DHW heating

■Time program for DHW circulation pump

■Only for weather-compensated mode

Heating curve slope and level

Settings and values that are additionally reset with

weather-compensated mode or continuous operation:

■Comfort room temperature or comfort flow tempera-

ture

■Time program for central heating

■The "Extended heating" function is switched off.

■"Holiday program" and "Holidays at home"

■Only for weather-compensated mode

Heating curve slope and level

Tap the following on-screen buttons:

2. "Settings"

3. "Factory settings"

4. to confirm

Further adjustments

Switching off the display screen for cleaning (cont.)

5593212

You can call up help messages relating to the displays

and functions.

Tap the following on-screen buttons:

1. to call up the help messages.

2. to return to the previous screen.

Checking information

Depending on the system equipment level and the set-

tings made, you can check current system data, e.g.

temperatures.

The system data is divided into the following groups:

■ General

■ Burner

■ DHW

■ Heating circuit 1

Only for weather-compensated mode or continuous

operation:

Heating circuit 2

etc.

■ Solar energy

■ Contractor contact details

■ Internet

■ Open source license

Calls up the licence for the programming unit.

Note

If names have been given to the heating circuits, the

allocated name is shown: See page 38.

Detailed options for checking the individual groups can

be found in chapter "Menu overview".

Tap the following buttons:

2. "Information"

3. Required group

Checking licences for the integrated communication module

Switch on the "Access point" of the appliance so that

you can call up online legal information, such as open

source licences.

Switching on access point

Tap the following on-screen buttons:

2. "Settings"

3. "Internet"

4. "WiFi operating mode"

5. "Access Point Status"

6. Follow the instructions in the mobile device app.

7. to confirm

Calling up the license information for third party components

Requirement: Access point must be switched on.

Tap the following buttons:

1. Call up the WiFi settings on your mobile device.

2. Connect your mobile device to the WiFi

"Viessmann-<xxxx>".

A password prompt will be displayed.

3. Enter the WPA2 network key as the password for

the "Viessmann-<xxxx>" WiFi.

Note

The WPA2 network key can be found on the label:

See chapter "Switching internet access on or off".

4. With your connected mobile device, open http://

192.168.0.1 in your internet browser.

Checks

Calling up help messages

5593212

5. Follow the link "Third party Components Licen-

ces".

Third party software

1 Overview

This product contains third party software, including

open source software. You are authorised to use this

third party software subject to compliance with the rel-

evant licensing terms as provided in this document.

A list of used third party software components and of

license texts can be accessed by connecting your

boiler, like it is mentioned in the manual.

2 Acknowledgements

Linux® is the registered trademark of Linus Torvalds in

the U.S. and other countries. This product includes

software developed by the OpenSSL Project for use in

the OpenSSL Toolkit (http://www.openssl.org/). This

product includes cryptographic software written by Eric

Young (eay@cryptsoft.com) and software written by

Tim Hudson ( tjh@cryptsoft.com ).

3 Disclaimer

The open source software contained in this product is

distributed WITHOUT ANY WARRANTY; without even

the implied warranty of MERCHANTABILITY or FIT-

NESS FOR A PARTICULAR PURPOSE. The single

licences may contain more details on a limitation of

warranty or liability.

4 How to obtain the source code

The software included in this product may contain

copyrighted software that is covered under a licence

requiring us to provide the source code of that soft-

ware, such as the GPL or LGPL. To obtain the com-

plete corresponding source code for such copyrighted

software, please get in touch with us via the contact

information provided in section 5 below indicating the

build number you will find in the licensing information

section, which can be accessed as outlined in this

document. This offer is not limited in time and is valid

to anyone in receipt of this information.

5 Contact information

Viessmann Climate Solutions SE

D-35108 Allendorf

Germany

Fax +49 64 52 70-27 80

Phone +49 64 52 70-0

open-source-software-support@viessmann.com

www.viessmann.de

Checking service messages

Your contractor can set service intervals. When these

service intervals are exceeded, a service message is

displayed automatically: "Service" and

If available, your heating contractor's contact details

will be displayed.

Tap the following on-screen buttons:

flashes in the navigation area.

Checks

Checking licences for the integrated… (cont.)

5593212

Calling up a service message

Tap the following buttons:

1. in the navigation area.

If fault messages are also present in your system,

they and any further messages can be called up

with "Faults", "Service messages".

2. "Service messages"

The service messages appear in a list.

3. Tapping on ? calls up information on the system’s

characteristics.

Tips on measures you can take yourself before

notifying your contractor are displayed.

4. Make a note of the service message number. For

example: P.1 "Interval until the next service".

This enables the contractor to be better prepared

and may save you unnecessary travelling costs.

5. Please notify your heating contractor.

6. for acknowledging a service.

Note

If the service cannot be carried out until a later date,

the service message will be displayed again the follow-

ing Monday.

Checking fault messages

If your system has developed faults, "Fault" and

are displayed. The Lightguide flashes even when

switched off: See chapter "Switching the Lightguide on

and off".

Tap the following buttons:

flashes in the navigation area.

Note

■If you have connected a message facility to alert you

to fault messages (e.g. a buzzer), this is deactivated

when the fault message is acknowledged.

■If troubleshooting cannot be carried out until a later

date, the fault message will be displayed again the

following day at 07:00. The message facility is

switched on again.

Calling up a fault message

Tap the following buttons:

1. in the navigation area.

If service messages are also present in your sys-

tem, they and any further messages can be called

up with "Faults", "Service messages".

2. "Faults"

The fault messages appear in a list.

3. Tapping on ? calls up information on the system’s

characteristics.

Tips on measures you can take yourself before

notifying your contractor are displayed.

4. Make a note of the fault number and the cause of

the fault. For example: F.160 "Communication

error CAN bus".

This enables the contractor to be better prepared

and may save you unnecessary travelling costs.

5. Please notify your heating contractor.

6. to acknowledge the fault.

Danger

If faults are not rectified, they can have life

threatening consequences.

Do not acknowledge fault messages several

times in quick succession. Please notify your

contractor if a fault occurs. Your contractor will

be able to analyse the cause and rectify the

fault.

Resetting the burner after a burner fault

If the burner is locked due to a fault, you can reset the

burner.

Checks

Checking service messages (cont.)

5593212

Tap the following on-screen buttons:

Further information is shown.

2. "Reset"

3. to confirm

The burner is reset and will restart.

Danger

If faults are not rectified, they can have life

threatening consequences.

Do not reset the burner several times in quick

succession. Immediately notify your contractor if

a burner fault occurs. Your contractor will be

able to analyse the cause and rectify the fault.

Checking message lists

Tap the following on-screen buttons:

2. "Message lists"

3. If the relevant messages are present:

■"Status"

■"Warnings"

■"Information"

■"Faults"

■"Service messages"

Checks

Checking fault messages (cont.)

5593212

The emissions test mode for testing flue gas must only

be activated by your flue gas inspector during the

annual inspection.

If possible, have the emissions test carried out during

the heating season.

Note

The flue gas inspector can activate emissions test

mode even if the control panel is locked.

Starting emissions test mode

Tap the following buttons:

2. "Test mode"

4. Follow the instructions on the display.

If test mode is possible, the burner starts. The flow

temperature of the heat generator is shown on the

display. The symbol is displayed.

Note

Ensure adequate heat transfer during emissions test

mode.

Stopping emissions test mode

■Automatically after 30 minutes

■Tap .

Emissions test mode

5593212

Shutting down heat generation with frost protection monitoring ("Standby mode")

For every heating circuit, select the "Standby mode"

operating program and switch off DHW heating: See

page 28 and 34.

■No central heating

■No DHW heating

■Frost protection for the heat generator and the DHW

cylinder is active.

Note

■All circulation pumps connected to the control unit

are briefly started every 24 hours to prevent them

from seizing up.

■The diverter valves are switched over at regular

intervals.

Shutting down heat generation without frost protection monitoring

■No central heating

■No DHW heating

■Frost protection for the heat generator and the DHW

cylinder is not enabled.

1. Turn off the ON/OFF switch: See page 49).

2. Close the gas shut-off valve.

!Please note

If outside temperatures of below 3 °C are

expected, take appropriate measures to pro-

tect the system from frost.

If this is the case, please contact your heat-

ing contractor.

Note

■As they are not being supplied with power, the circu-

lation pumps and diverter valves may seize up.

■If your system has been shut down for a prolonged

period, you may have to reset the "Time" and

"Date": See page 38.

Start-up/shutdown

Switching the system off

5593212

Vitodens 200-W

ABCD

Fig. 13

Note

The control unit can be located at the top or bottom.

AGas shut-off valve

BDrain & fill valve

CON/OFF switch

DSystem pressure (shown on display)

Vitodens 222-W

BA C D

Fig. 14

Note

The control unit can be located at the top or bottom.

AGas shut-off valve

BDrain & fill valve

CON/OFF switch

DSystem pressure (shown on display)

Vitodens 222-F and Vitodens 242-F

Fig. 15 Example with connections at the top

AGas shut-off valve

BDrain & fill valve

CON/OFF switch

DSystem pressure (shown on display)

Ask your contractor about the following:

■Required system pressure

■Position of ventilation apertures in the installation

room, if applicable

1. Open gas shut-off valve A.

2. Check whether the power supply to your system is

switched on, e.g. at a separate MCB/fuse or mains

isolator.

Note

The power supply to the system was switched on

by your heating contractor during commissioning. If

possible, do not interrupt the power supply, even

when the system is in standby mode.

3. Turn ON/OFF switch C on.

■After a short while, the home screen is shown on

the display.

■The Lightguide is illuminated constantly.

Your system and, if installed, your remote controls

are ready for operation.

Start-up/shutdown

Switching on the system

5593212

4. Check the system pressure:

■ for the "System overview" default display

■If the pressure shown is below 1.0 bar:

Please top up with water or notify your heating

contractor.

Start-up/shutdown

Switching on the system (cont.)

5593212

Cause Remedy

The heat generator is switched off. ■Turn on the ON/OFF switch: See page 49.

■Switch ON the power supply to your system, e.g. at a

separate MCB/fuse or mains isolator.

■Incorrect control unit settings.

■The remote control (if installed) or the room tempera-

ture controller (if installed) is set incorrectly.

Operating instructions, for the remote control

unit or room temperature controller

Central heating must be enabled.

Check the settings and correct if required:

■Operating program: See page 19.

■Room temperature/flow temperature: See page 28.

■Time: See page 38.

■Time program for central heating: See page 29.

■Only for weather-compensated mode:

Heating curve: See page 29.

■Only for weather-compensated mode or continuous

operation:

The holiday program is switched on: See page 32.

The DHW cylinder is being heated. Wait until the DHW cylinder has been heated up.

Reduce the DHW draw-off rate or temporarily reduce

the set DHW temperature if necessary.

No fuel. Open the gas shut-off valve. If necessary, check with

your gas supply utility.

"Burner fault" is displayed. Reset the burner: See page 45.

Danger

If faults are not rectified, they can have life

threatening consequences.

Do not reset the burner several times in quick

succession. Immediately notify your contractor if

a burner fault occurs. Your contractor will be able

to analyse the cause and rectify the fault.

"Fault" is displayed. Check what type of fault it is. Make a note of the fault

message and acknowledge the fault: See page 45. You

may have to notify your contractor.

"Screed drying" is switched on. No action required.

After expiry of the screed drying time, the selected op-

erating program is switched on.

What to do if...

Rooms are too cold

5593212

Cause Remedy

■Incorrect control unit settings.

■The remote control (if installed) or the room tempera-

ture controller (if installed) is set incorrectly.

Operating instructions, for the remote control

unit or room temperature controller

Check the settings and correct if required:

■Operating program: See page 19.

■Room temperature/flow temperature: See page 28.

■Time: See page 38.

■Time program for central heating: See page 29.

■Only for weather-compensated mode:

Heating curve: See page 29.

■Only for weather-compensated mode or continuous

operation:

The "Holidays at home" function is switched on:

See page 31.

"Fault" is displayed. Check what type of fault it is. Make a note of the fault

message and acknowledge the fault: See page 45. You

may have to notify your contractor.

"Screed drying" is switched on No action required.

After expiry of the screed drying time, the selected op-

erating program is switched on.

There is no hot water

Cause Remedy

The heat generator is switched off. ■Turn on the ON/OFF switch: See page 49.

■Switch ON the power supply to your system, e.g. at a

separate MCB/fuse or mains isolator.

■Incorrect control unit settings.

■The remote control (if installed) or the room tempera-

ture controller (if installed) is set incorrectly.

Operating instructions, for the remote control

unit or room temperature controller

DHW heating must be enabled.

Check the settings and correct if required:

■Operating program: See page 19.

■DHW temperature: See page 34.

■Time: See page 38.

■Time program for DHW heating: See page 34.

■Only for weather-compensated mode or continuous

operation:

The holiday program is switched on for all heating cir-

cuits: See page 32.

No fuel. Open the gas shut-off valve. If necessary, check with

your gas supply utility.

"Fault" is displayed. Check what type of fault it is. Make a note of the fault

message and acknowledge the fault: See page 45. You

may have to notify your contractor.

"Screed drying" is switched on No action required.

After expiry of the screed drying time, the selected op-

erating program is switched on.

"Filter strainer" dirty

(only gas condensing combi boilers).

Have the filter strainer checked/replaced by a heating

contractor.

What to do if...

Rooms are too hot

5593212

Cause Remedy

Incorrect control unit settings. Check and correct the set DHW temperature if re-

quired: See page 34.

The hygiene function is switched on. Wait until the hygiene function has been completed.

DHW temperature for solar DHW heating is set too

high.

Have your contractor change the setting.

"Fault" is displayed

Cause Remedy

System fault Proceed as described on page 45.

ë and "Service" are displayed

Cause Remedy

The time for a service as specified by your contractor

has arrived.

Proceed as described on page 44.

"Panel locked" is displayed

Cause Remedy

The control panel is locked. Unlock it: See page 37.

"External hook-up" is displayed

Cause Remedy

The set operating program was changed over by an ex-

ternal device, e.g. an EM-EA1 extension (DIO electron-

ics module): See page 19.

No action required.

Once the external changeover no longer applies, the

set operating program is switched on again.

What to do if...

The DHW is too hot

5593212

The appliances can be cleaned with a commercially

available domestic cleaning agent (non-scouring).

Clean the surface of the programming unit with a

microfibre cloth.

Inspection and maintenance

The inspection and maintenance of a heating system

is prescribed by the Buildings Energy Act [Germany]

and the DIN 4755, DVGW-TRGI 2018 and

DIN EN 806-5 standards.

Regular maintenance ensures trouble-free, energy effi-

cient, environmentally responsible and safe heating

operation. Your heating system must be serviced by an

authorised contractor at least every 2 years. For this, it

is best to arrange an inspection and maintenance con-

tract with your local contractor.

Appliance

Increased contamination raises the flue gas tempera-

ture and thereby increases energy losses. We recom-

mend the appliance is cleaned annually.

DHW cylinder

Standard EN 806-5 specifies that maintenance and

cleaning should be carried out no later than 2 years

after commissioning and as required thereafter.

Only a qualified contractor should clean the inside of

the DHW cylinder and the DHW connections.

If any water treatment equipment (e.g. a sluice or

injection system) is installed in the cold water supply of

the DHW cylinder, ensure this is refilled in good time.

For this, observe the manufacturer's instructions.

Safety valve (DHW cylinder)

The function of the safety valve must be checked

every six months by the user or a contractor through

venting (see valve manufacturer's instructions). The

valve seat may become contaminated.

Water may drip from the safety valve during a heat-up

process. The outlet is open to the atmosphere.

!Please note

Overpressure can cause damage.

Do not close the safety valve.

Potable water filter (if installed)

To maintain high hygienic standards, proceed as fol-

lows:

■Replace filter element on non-back flushing filters

every six months (visual inspection every

two months).

■On back flushing filters, back flush every

two months.

Damaged cables / lines

If there is damage to the connecting cables or lines of

the appliance or externally installed accessories, these

must be replaced with Viessmann cables or lines. For

this, contact your qualified contractor.

Maintenance

Cleaning

5593212

Note

Not all of the displays and checks listed may be availa-

ble under , depending on the features of your sys-

tem.

Heating

Heating circuit 1

Set room temperatures or Set flow temperature

Time program, heating

Only for weather-compensated mode:

Heating curve

Only for weather-compensated mode or continuous operation:

Additional heating circuits , ...

As for Heating circuit 1

Test mode

DHW

DHW on/off

Set DHW temperature

Time program, DHW

Time program, DHW circulation

Hygiene function

Settings

Language

Display setting

Date and time

Buzzer

Only for weather-compensated mode or continuous operation:

Rename heating circuits

Factory settings

Internet

Low power radio on/off

Clean screen

Units

Lock panel

Change password

Selecting the default display

Energy cockpit

Appendix

Overview of "Main menu"

5593212

Information

General

System pressure

Only for weather-compensated mode:

Outside temperature

Flow temperature

Boiler circuit pump

Temperature, low loss header

Flue gas temperature

Burner

Burner hours run

Thermal output

Central fault message

Screed function

Time

Date

Serial number of heat generator VIN

Serial number of electronics module HMU

Heating circuit 1

Operating program

Operating status

Only for weather-compensated mode or continuous operation:

Time program

Room temperature

Set reduced room temperature or Reduced

Set normal room temperature or Normal

Only for weather-compensated mode or continuous operation:

Set comfort room temperature or Comfort

Only for weather-compensated mode:

Heating curve slope

Heating curve level

Heating circuit pump

Flow temperature

Only for weather-compensated mode or continuous operation:

Holiday program

Only for weather-compensated mode or continuous operation:

Holidays at home

Only for weather-compensated mode or continuous operation:

Additional heating circuits , ...

As for Heating circuit 1

Appendix

Overview of "Main menu" (cont.)

5593212

Information

DHW

Time program, DHW

Time program, DHW circulation

DHW temperature

DHW circulation pump

Cylinder loading pump

Burner

Burner hours run

Burner starts

Burner modulation

Flow temperature

Flue gas temperature

Flow sensor

Contractor contact details

Internet

Manufacturer's details

MAC address

Activated

Network

Signal strength

DHCP activated

Ipv4 address

Ipv4 subnet mask

Standard gateway

Primary DNS server

Secondary DNS server

Backend connection

Network connection

Open source license

Appendix

Overview of "Main menu" (cont.)

5593212

Information

Solar energy

Solar energy bar chart

Collector temperature

Solar DHW

Solar circuit pump (operating time)

Solar energy

Solar circuit pump (operating state)

Set DHW temperature for reheating suppression

Solar stagnation

TS3: Temperature, DHW preheating

TS4: Temperature, DHW reheating

Solar circulation pump

TS3: Buffer temperature

TS4: Return temperature, heating circuit

Solar 3-way valve position

Solar central heating backup

TS3: DHW preheating temperature

Only for weather-compensated mode or continuous operation:

Holiday program

Note

This can be selected only if "Apartment building" was selected during commissioning and

multiple heating circuits are installed.

Select all

Heating circuit 1

Heating circuit 2

etc.

Only for weather-compensated mode or continuous operation:

Holidays at home

Note

This can be selected only if "Apartment building" was selected during commissioning and

multiple heating circuits are installed.

Select all

Heating circuit 1

Heating circuit 2

etc.

Message lists

Service

Appendix

Overview of "Main menu" (cont.)

5593212

Standby mode

Heat generation is switched off.

Note

Standby mode can be selectively enabled for one or

more heating circuits or for DHW heating.

If all heating circuits and DHW heating are shut down:

Frost protection is only active for the heat generator

and DHW cylinder. No central heating, no DHW heat-

ing.

Setback mode (reduced heating mode)

See "Reduced heating mode".

System version

The system version describes the components of your

system.

Some examples:

■Heat generator

■Heating circuit pump

■Mixer

■Valves

■Electronics module

■Radiator

Every system is individually configured and adapted to

the local conditions by your heating contractor.

Operating program

The operating program enables you to define the fol-

lowing, for example:

■How you heat your rooms

■Whether you heat DHW

Operating status

See "Time program".

Operating mode

See "Heating operation".

Mixer extension kit

Assembly (accessories) for controlling a heating circuit

with mixer: See "Mixer".

Screed drying

Your contractor can switch on this function for screed

drying, for example in your new build or extension.

This means your screed is dried in line with a fixed

time program (temperature/time profile) that is appro-

priate for the building materials used.

Screed drying affects all heating circuits:

■All rooms are heated according to the temperature/

time profile.

Your settings for central heating have no effect on

the duration of screed drying (max. 32 days).

■No DHW heating

Appendix

Terminology

5593212

Underfloor heating

Underfloor heating systems are slow, low temperature

heating systems that respond only very slowly to short

term temperature changes.

Heating with reduced room temperature at night there-

fore does not result in any significant energy savings.

Heating mode

Operating modes

To heat your home, the heat generator provides heat

as specified by the set flow temperature. The operating

mode determines whether the flow temperature is

specified with a fixed value or whether it is automati-

cally calculated and adjusted subject to several ancil-

lary conditions.

Your contractor can configure the following operating

modes during commissioning:

■Weather-compensated operation

■Continuous operation

■Room temperature-dependent operation

Comfort mode

For periods when you are at home during the day, heat

your home with the comfort room temperature or the

comfort flow temperature, depending on the operating

mode. Set the periods (time phases) with the "Com-

fort" temperature level using the time program for cen-

tral heating.

Continuous operation

In continuous operation the heat generator provides

heating water with a constant flow temperature regard-

less of the outside temperature.

With this operating mode, you can operate several

heating circuits via your control unit.

Standard heating mode

For periods when you are at home during the day, heat

your home with the normal room temperature or the

normal flow temperature, depending on the operating

mode. Set the periods (time phases) with the "Stand-

ard" temperature level using the time program for cen-

tral heating.

Room temperature-dependent heating operation

In room temperature-dependent operation a room is

heated until the set room temperature has been

reached. For this, a separate temperature sensor must

be installed in the room.

The heating output is controlled independently of the

outside temperature.

With this operating mode, you can operate one heating

circuit via your control unit. You can input some of the

settings for this heating circuit at your room tempera-

ture controller.

Reduced heating operation

For periods when you will be absent or during the

night, heat your rooms with the reduced room temper-

ature or the reduced flow temperature, depending on

the operating mode. Set the periods (time phases) with

the "Reduced" temperature level using the time pro-

gram for central heating.

With underfloor heating systems, reduced heating

operation only yields limited energy savings (see

"Underfloor heating system").

Weather-compensated heating operation

In weather-compensated operation, the flow tempera-

ture is controlled according to the outside temperature.

More heat is made available at a lower outside temper-

ature than at a higher one.

The outside temperature is captured and transmitted to

the control unit by a sensor fitted outside the building.

With this operating mode, you can operate several

heating circuits via your control unit. If remote control

units are installed in your rooms, you can also adjust

the settings at the remote control units.

Heating curve

Heating curves illustrate the relationship between the

outside temperature, the set room temperature and the

flow temperature. The lower the outside temperature,

the higher the flow temperature.

In order to guarantee sufficient heat with minimum

energy consumption at any outside temperature, the

conditions of your building and system must be taken

into consideration. The heating curve is adjusted by

your contractor for this purpose.

Appendix

Terminology (cont.)

5593212

3.2

3.4

Flow temperature in °C

Outside temperature in °C

Heating curve slope

3.0

2.8

2.2

2.4

2.0

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

1.8

2.6

1020 -30-20-100

Fig. 16

Setting the slope and level, taking the heating curve as an example

Factory settings:

■Slope = 1.4

■Level = 0

The heating curves shown apply with the following set-

tings:

■Heating curve level = 0

■Standard room temperature (set room temperature)

= 20 °C

0.2

Outside temperature in °C

Slope

2.4

2.62.8

3.03.2

3.4

0 -10 -2010

2.0

2.2

Set room

temperature in °C

35 30 25 20 15 10 5

0.4

0.6

0.8

1.0

1.2

1.4

-30

1.8

1.6

-14

Flow temperature in °C

Fig. 17

For an outside temperature of −14 °C:

AUnderfloor heating system: Slope 0.2 to 0.8

BLow temperature heating system: Slope 0.8 to 1.6

CSystem with a flow temperature in excess of 75 °C, slope 1.6 to 2.0

Appendix

Terminology (cont.)

5593212

Flow temperature

in °C

110

Outside temperature

in °C

3.5

1.4

0.2

-20

Set room temperature in °C

35 30 25 20 15 10 5

Fig. 18

AIf you change the slope:

The steepness of the heating curves changes.

BIf you change the level:

The heating curves are shifted in parallel in a verti-

cal direction.

CIf you change the standard room temperature (set

room temperature):

The heating curves are shifted along the "Set room

temperature" axis.

Note

Setting the slope or level too high or too low will not

cause any damage to your heating system.

Both settings affect the level of the flow temperature,

which may then be too low or unnecessarily high.

Heating circuit

A heating circuit is a sealed unvented circuit connect-

ing the heat generator and the radiators, in which the

heating water circulates.

A system may comprise several heating circuits.

For example, one heating circuit for the rooms occu-

pied by you and one heating circuit for the rooms of a

separate apartment.

The heating circuits are designated at the factory as

"Heating circuit 1", "Heating circuit 2", etc.

If you or your qualified contractor have renamed the

heating circuits, e.g. as "Apartment", that name will be

displayed instead of "Heating circuit...".

Heating circuit pump

Circulation pump for circulating the heating water in

the heating circuit

Mixer

Hot heating water from the heat generator is mixed

with cooled heating water from the heating circuit. The

heating water, thus brought to the required tempera-

ture, is pumped to the heating circuit by the heating cir-

cuit pump. To ensure the required set room tempera-

ture is achieved, the control unit adjusts the flow tem-

perature via the mixer to suit different conditions.

Appendix

Terminology (cont.)

5593212

Night setback

See "Reduced heating mode"

Open flue operation

The combustion air is drawn from the room where the

heat generator is installed.

Room sealed operation

The combustion air is drawn from outside the building.

Room temperature

■Standard room temperature or comfort room temper-

ature:

Set the standard room temperature or comfort room

temperature for periods when you are at home dur-

ing the day.

■Reduced room temperature:

For periods when you will be absent or during the

night, set the reduced room temperature; see "Heat-

ing mode".

Return temperature

The return temperature is the temperature at which the

heating water leaves a system component such as a

heating circuit.

Safety valve

Safety equipment that must be installed in the cold

water pipe by your contractor. The safety valve opens

automatically to prevent excess pressure in the DHW

cylinder.

The heating circuits are also equipped with safety

valves.

Solar circuit pump

In conjunction with solar thermal systems. The solar circuit pump delivers the cooled heat transfer

medium from the indirect coil of the DHW cylinder to

the solar collectors.

Set temperature

See "Set temperature".

Summer mode

In warmer months, you can switch off heating opera-

tion.

To do so, select "DHW" operating program "On" and

"Standby mode".

The system remains in operation for DHW heating.

Central heating is switched off.

Appendix

Terminology (cont.)

5593212

Cylinder primary pump

Circulation pump for heating the DHW in the DHW cyl-

inder.

Set temperature

Specific temperature that should be reached, e.g. set

DHW temperature for example.

Drinking water filter

A device that removes solids from the drinking water.

The drinking water filter is built into the cold water

pipework to the DHW cylinder.

Flow temperature

The flow temperature is the temperature at which the

heating water enters a system component such as a

heating circuit.

Weather-compensated operation

See "Heating mode"

Time program

In the time programs, you specify what your heating

system should do at what time.

Operating status

The operating status indicates how a component of

your heating system is being operated.

For example, the operating statuses for central heating

have different temperature levels.

The times for the operating status changeover are

defined when the time programs are set.

DHW circulation pump

The DHW circulation pump transports the DHW

around a loop line between the DHW cylinder and the

draw-off points (e.g. hot tap). This ensures that hot

water is rapidly available at the draw-off points.

Information on disposal

Disposal of packaging

Your contractor will dispose of the packaging from your

Viessmann product.

Appendix

Terminology (cont.)

5593212

Final decommissioning and disposal of the heating system

Viessmann products can be recycled. Components

and fluids from your heating system do not belong in

ordinary domestic waste.

Please speak to your contractor about the correct dis-

posal of your old system.

Appendix

Information on disposal (cont.)

5593212

Access point mode.....................................................43

Actual temperature, checking.....................................43

Advanced settings......................................................38

Ambient temperatures................................................12

Brightness setting.......................................................37

Burner reset............................................................... 45

Calling up

– Help messages....................................................... 43

Central heating

– Factory settings.......................................................13

– Operating program.................................................. 19

– Switching off............................................................28

– Switching on............................................................28

– Time phases............................................................29

– Time program..........................................................29

Check

– Fault message.........................................................45

– Information.............................................................. 43

– Operating statuses.................................................. 43

– Service message (maintenance message)............. 44

– Temperatures.......................................................... 43

Checking.............................................................. 24, 25

– DHW cylinder.......................................................... 25

– Heat generator gas consumption...................... 24, 25

Cleaning............................................................... 41, 54

Cleaning information.................................................. 54

Cold rooms.................................................................51

Comfort (tips)............................................................. 14

Commissioning.....................................................12, 49

Contact details of heating contractor..........................39

Contractor.................................................................. 39

Controls......................................................................15

Controls locked out.................................................... 53

Cylinder primary pump............................................... 64

Date/time, factory setting........................................... 13

Date setting................................................................ 38

Day temperature (standard flow temperature)........... 13

Day temperature (standard room temperature)... 13, 28

Default display

– Continuous operation.............................................. 23

– DHW........................................................................23

– Energy cockpit.........................................................23

– Favourites............................................................... 26

– Heating....................................................................23

– System overview..................................................... 26

Default display, permanent.........................................39

Default setting............................................................ 12

DHW circulation pump............................................... 64

– Energy saving......................................................... 13

– Time phases............................................................35

– Time program..........................................................35

DHW comfort function

– Time phases............................................................34

– Time program..........................................................34

DHW heating

– Comfort................................................................... 14

– Energy saving......................................................... 13

– Factory setting.........................................................13

– Operating program............................................ 19, 34

– Outside time program..............................................35

– Time phases............................................................34

– Time program..........................................................34

DHW heating, one-off.................................................25

DHW hygiene............................................................. 35

DHW temperature

– Higher......................................................................35

– Setting..................................................................... 34

Display backlight........................................................ 37

Display screen cleaning............................................. 41

Drinking water filter.................................................... 64

Emissions test mode.................................................. 47

Energy balance.................................................... 24, 26

Energy saving (tips)................................................... 13

Energy saving function

– Holiday program......................................................32

– Long periods of absence.........................................32

Extension kit...............................................................59

External hook-up........................................................ 19

Factory setting............................................................12

Factory settings reset.................................................42

Fault display............................................................... 53

Fault message

– Acknowledging........................................................ 45

– Checking................................................................. 45

Favourites.................................................................. 26

Favourites compilation............................................... 26

Filter (drinking water)................................................. 64

Flow temperature................................................. 28, 64

Flue gas emissions testing.........................................47

Frost protection.......................................................... 13

Frost protection monitoring.................................. 13, 48

Further settings.......................................................... 38

Glossary..................................................................... 59

Heat generator

– Switching on............................................................49

Heat generator, switching on......................................49

Heat generator heating characteristics, changing......29

Heating circuit............................................................ 62

Heating circuit naming................................................38

Heating circuit pump.................................................. 62

Heating circuit with mixer........................................... 59

Keyword index

5593212

Heating curve

– Explanation............................................................. 60

– Setting..................................................................... 29

Heating mode, reduced..............................................13

Heating mode, standard.............................................13

Heating system

– Switching off............................................................48

Heating times setting..................................................20

Help message call up.................................................43

Higher DHW temperature...........................................35

Holiday....................................................................... 32

Holiday program

– Switching off............................................................32

– Switching on............................................................32

Holidays at home....................................................... 14

– Switching off............................................................32

– Switching on............................................................32

Home screen..............................................................16

Information..................................................................11

Information, checking................................................. 43

Inspection...................................................................54

Installation room.........................................................12

Internet access, switching on..................................... 40

Language selection.................................................... 39

Legal information

– Communication module.......................................... 43

– Programming unit....................................................43

Level...........................................................................29

Level of heating curve................................................ 60

Liability......................................................................... 9

Licences..................................................................... 12

– Communication module.......................................... 43

– Programming unit....................................................43

Lightguide.............................................................15, 38

– Meaning.................................................................. 15

Low power radio on/off...............................................40

Main menu................................................................. 18

Maintenance...............................................................54

Maintenance contract.................................................54

Menu structure........................................................... 55

Names for heating circuits..........................................38

Network selection.......................................................41

Night setback............................................................. 63

Night temperature (reduced flow temperature).......... 13

Night temperature (reduced room temperature)........ 13

No hot water...............................................................52

Notice of completion...................................................12

ON/OFF switch ..........................................................49

One-off DHW heating.................................................25

– Switching off............................................................35

– Switching on............................................................35

Open flue operation....................................................63

Open source licences

– Communication module.......................................... 43

– Programming unit....................................................43

Operating mode

– Explanation............................................................. 59

Operating program

– Central heating, DHW............................................. 19

– DHW only................................................................ 63

– Setting, DHW.......................................................... 34

– Special.................................................................... 19

– Terminology.............................................................59

Operating status.........................................................64

– Explanation............................................................. 59

Operating statuses, checking.....................................43

Operation, disabling................................................... 37

Power failure.............................................................. 13

Pressure gauge..........................................................49

Pressure indicator...................................................... 49

Product information.................................................... 11

Pump

– Cylinder heating...................................................... 64

– DHW circulation...................................................... 64

– Heating circuit......................................................... 62

– Solar circuit............................................................. 63

Reduced flow temperature (night temperature)......... 13

Reduced room temperature (night temperature)........13

Reset..........................................................................42

Return temperature.................................................... 63

Room sealed operation.............................................. 63

Room temperature

– Adjusting for longer periods at home...................... 31

– Energy saving......................................................... 13

– For standard heating mode..................................... 28

Safety valve................................................................63

Screed drying............................................................. 19

Screensaver............................................................... 15

Service message

– Display.................................................................... 53

Service message (maintenance message)

– Checking................................................................. 44

Setback mode............................................................ 59

Set temperature................................................... 63, 64

Shutdown................................................................... 48

Shutting down

– Heating system with frost protection monitoring..... 48

– System without frost protection monitoring............. 48

Slope.......................................................................... 29

Slope of heating curve............................................... 60

Keyword index

Keyword index (cont.)

5593212

Solar thermal system................................................. 63

Standard flow temperature (day temperature)........... 13

Standard room temperature (day temperature)......... 13

Standard setting......................................................... 42

Standby...................................................................... 15

Standby mode...................................................... 48, 59

Starting

– Frost protection monitoring..................................... 48

– Standby mode......................................................... 48

– System.................................................................... 49

Static IP addressing................................................... 41

Status display.............................................................15

Summer/wintertime, setting........................................38

Summer mode......................................................59, 63

Summertime changeover........................................... 13

System

– Switching on............................................................49

Temperature

– Checking................................................................. 43

– Set temperature................................................ 63, 64

– Standard room temperature.................................... 28

Temperatures in the DHW cylinder............................ 25

Terminology................................................................59

Test mode...................................................................47

Time/date, factory setting........................................... 13

Time phase changing................................................. 21

Time phase deletion................................................... 22

Time phases

– Central heating........................................................29

– DHW circulation pump............................................ 35

– DHW comfort function............................................. 34

– DHW heating...........................................................34

Time phase setting..................................................... 20

Time program....................................................... 13, 64

– Central heating........................................................29

– Comfort................................................................... 14

– DHW circulation pump............................................ 35

– DHW comfort function............................................. 34

– DHW heating...........................................................34

– Energy saving......................................................... 13

– Setting..................................................................... 19

Time setting................................................................38

Troubleshooting..........................................................51

Underfloor heating......................................................60

Units, setting.............................................................. 39

Utilisation....................................................................11

ViCare app................................................................. 15

Water too cold............................................................ 52

Water too hot..............................................................53

Weather-compensated operation...............................64

WiFi connection....................................................40, 41

WiFi network.............................................................. 40

Winter mode...............................................................59

Wintertime/summertime changeover......................... 13

Wintertime changeover.............................................. 13

Wireless connection to the remote control, switching

on............................................................................... 40

Certification

Your contact

Contact your local contractor if you have any questions about your system or wish to arrange maintenance or

repair work. You can find local contractors on the internet at www.viessmann.de.

Viessmann Limited

Hortonwood 30, Telford

Shropshire, TF1 7YP, GB

Telephone: +44 1952 675000

Fax: +44 1952 675040

E-mail: info-uk@viessmann.com

Viessmann Climate Solutions SE

35108 Allendorf / Germany

Telephone: +49 6452 70-0

Fax: +49 6452 70-2780

www.viessmann.com

5593212 Subject to technical modifications.

Keyword index (cont.)

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