Vaillant VRC 470 User manual

For the operator
Instructions for use
VRC 470
Weather compensator
GB, IE
Instructions for use

Legal information
Document type: Instructions for use
Product: VRC 470
Target group: Operator
Language: EN
Document number_version: 0020116689_01
Created on: 11.10.2012
Publisher/manufacturer
Vaillant GmbH
Berghauser Str. 40 D-42859 Remscheid
Telefon [phone]‑0 Telefax [phone]‑28 10
[email protected] www.vaillant.de
© Vaillant GmbH 2012
These instructions, or extracts thereof, may only be printed with the written consent of Vaillant GmbH.
All designations of products in these instructions are brand names/trade marks of the companies in question.
We reserve the right to make technical changes.

Contents
0020116689_01 VRC 470 Instructions for use 3
Contents
1 Notes on the documentation .............................. 4
1.1 Observing other applicable documents ................. 4
1.2 Document storage ................................................. 4
1.3 Applicability of the instructions .............................. 4
1.4 Nomenclature ........................................................ 4
2 Safety .................................................................... 5
2.1 Action-related warnings ......................................... 5
2.2 Required personnel qualifications ......................... 5
2.3 General safety information .................................... 5
2.4 CE label ................................................................. 6
2.5 Intended use .......................................................... 6
3 Overview of the equipment................................. 7
3.1 Unit design............................................................. 7
3.2 Identification plate.................................................. 7
3.3 Serial number ........................................................ 7
3.4 Control function...................................................... 7
3.5 Frost protection function ........................................ 8
4 Operating.............................................................. 8
4.1 Operating structure................................................ 8
4.2 Operating concept ................................................. 9
4.3 Overview of setting and read-out options ............ 11
5 Operating and display functions...................... 11
5.1 Information........................................................... 11
5.2 Settings................................................................ 13
5.3 Operating modes ................................................. 18
5.4 Advanced functions ............................................. 20
5.5 Messages ............................................................ 21
6 Service and troubleshooting ............................ 22
6.1 Cleaning the controller......................................... 22
6.2 Detecting and rectifying faults ............................. 22
7 Decommissioning.............................................. 22
7.1 Replacing the controller....................................... 22
7.2 Recycling and disposal........................................ 22
8 Guarantee and customer service..................... 22
8.1 Guarantee............................................................ 22
8.2 Customer service................................................. 22
9 Technical data.................................................... 22
9.1 Controller ............................................................. 22
9.2 Sensor resistances .............................................. 22
Appendix ............................................................................ 23
A Operating modes ............................................... 23
B Overview of operating levels............................ 23
Index ................................................................................... 29

1 Notes on the documentation
4Instructions for use VRC 470 0020116689_01
1 Notes on the documentation
1.1 Observing other applicable documents
▶You must observe all instructions for use that are en-
closed with other components of your system.
1.2 Document storage
▶Store the enclosed operating instructions and all other
applicable documents in such a way that they are avail-
able whenever required and for any subsequent operat-
ors of the system.
1.3 Applicability of the instructions
These instructions apply for the following products only:
VRC 470/3 and VRC 470/4 article number
Great Britain 0020108130
1.4 Nomenclature
The term "heat pump" is used if there is no difference
between the heat pumps.
The term "hybrid heat pump" is used when the
VWS 36/4 230 V or VWL 35/4 S 230 V heat pump is meant.
The term "monoblock heat pump" is used when
the VWL 85/2 A 230 V,VWL 115/2 A 230 V, or
VWL 115/2 A 400 V heat pump is meant.

Safety 2
0020116689_01 VRC 470 Instructions for use 5
2 Safety
2.1 Action-related warnings
Classification of action-related warnings
The action-related warnings are classified in accordance
with the severity of the possible danger using the following
warning signs and signal words:
Warning symbols and signal words
Danger!
Imminent danger to life or risk of severe personal
injury
Danger!
Risk of death from electric shock
Warning.
Risk of minor personal injury
Caution.
Risk of material or environmental damage
2.2 Required personnel qualifications
These instructions are aimed at those who are able to oper-
ate a heating installation but do not have any special tech-
nical knowledge or experience.
2.2.1 Instructed operator (Operator)
Definition:
Instructed
operator
The operator is charged with operation and
maintenance of the unit. He/she must ensure
compliance with maintenance intervals. He/she
does not require any special technical know-
ledge or experience.
The operator must have been instructed in
the following topics by the authorised skilled
tradesman.
–General safety information
–Function and location of safety devices on
the system
–Operation of the unit
–Energy-saving operation
–Maintenance operations
2.3 General safety information
2.3.1 Installation only by a skilled tradesman
Installation of the unit can be only carried out by an ap-
proved, skilled tradesman. This skilled tradesman is also
responsible for proper installation and start-up.
2.3.2 Risk of death from contaminated drinking
water
The controller is equipped with an Anti-legionella function
to protect against infection by germs (Legionella). When
this Anti-legionella function is activated, the water in the do-
mestic hot water cylinder is heated to over 60 °C for at least
an hour. The skilled tradesman activates the Anti-legionella
function on installation of the controller.
▶Ask the skilled tradesman if he has activated the Anti-
legionella function.
▶Ask the skilled tradesman to explain how the Anti-legion-
ella function works.
2.3.3 Risk of scalding from hot drinking water
There is a risk of scalding at the hot water draw-off points
if the set target temperature is greater than 60 °C. Young
children and elderly persons are particularly at risk, even at
lower temperatures.
▶Select a moderate set target temperature.
If the Anti-legionella function is activated, discuss with your
competent person:
–when the anti-legionella function starts,
–when the hot water is cooled back down to the set target
temperature,
–whether a mixer valve is incorporated in your heating
installation as protection against scalding,
–what do you have to do to avoid scalding.
2.3.4 Danger caused by a malfunction
▶Ensure that air can circulate freely around the controller,
and that the controller is not covered by furniture, cur-
tains or other objects.
▶Ensure that all radiator valves in the room where the con-
troller is fitted are fully open.
▶Only operate the heating installation when it is in a tech-
nically perfect condition.
▶Ensure that any faults and damage that may negatively
affect safety are rectified immediately.
2.3.5 Frost damage caused by switching the
appliance off
If you switch off the heating installation, parts of the heating
installation may be damaged by frost.
▶Do not disconnect the heat generator from the mains
power.
▶Leave the heating installation main switch in the "1" posi-
tion.

2 Safety
6Instructions for use VRC 470 0020116689_01
2.3.6 Frost damage caused by excessively low
room temperature
If the room temperature is set too low in individual rooms,
sections of the heating installation might be damaged by
frost.
▶If you are absent during a frosty spell, ensure that the
heating installation remains in operation and the rooms
are warmed adequately.
▶Please note the frost protection function.
2.3.7 Moisture and mould damage due to
inadequate exchange of air
In heavily insulated rooms that only allow a small exchange
of air, moisture and mould damage may occur.
▶Ventilate the rooms regularly by opening windows and
activate the 1 x ventilation boost function once to save
energy.
If a ventilation unit is connected (applies for controller ver-
sion VRC 470/4):
▶Do not disconnect the ventilation unit from the power
mains.
▶Clean and service the ventilation unit. The instructions for
cleaning and maintenance can be found in the ventilation
unit manual.
2.4 CE label
The CE label shows that the products comply with
the basic requirements of the applicable directives as stated
on the identification plate.
2.5 Intended use
State-of-the-art
The controller is a state-of-the-art unit manufactured in ac-
cordance with recognised safety regulations.
Even so, in the event of inappropriate or non-intended use,
damage to the appliance and other property may arise.
The controller controls a heating system with a Vaillant boiler
with eBUS interface in a way that is weather-controlled and
time-dependent.
The controller can control the hot water generation from a
connected DHW cylinder.
If a circulation pump is connected, the controller can also
control the hot water supply and circulation.
The controller can control a connected ventilation unit with
an eBUS interface on a time-dependent basis.
Improper use
Any other use that is not specified in these instructions,
or use beyond that specified in this document shall be
considered improper use. Any direct commercial or
industrial use is also deemed to be improper. The manufac-
turer/supplier is not liable for any claims or damage resulting
from improper use. The user alone bears the risk.
Any improper use is prohibited.
Other applicable documents
Intended use includes the following:
–observance of accompanying operating, installation and
servicing instructions for the Vaillant product as well as
for other parts and components of the system
–compliance with all inspection and maintenance condi-
tions listed in the instructions.

Overview of the equipment 3
0020116689_01 VRC 470 Instructions for use 7
3 Overview of the equipment
3.1 Unit design
1
3
2
6
5
4
7
1 Display
2 Wall-mounting base
3 Diagnostics socket
4 Wall base strip
5 Right-hand selection
button
6 Rotary knob
7 Left-hand selection button
3.2 Identification plate
The identification plate is located inside the controller and is
not accessible from the outside.
3.3 Serial number
The 10-digit article number can be found in the serial num-
ber. You can view the serial number under Menu →Inform-
ation Serial number. The article number is found in the
second line of the serial number.
3.4 Control function
The controller controls the Vaillant heating installation, the
connected ventilation unit and hot water generation of a con-
nected domestic hot water cylinder.
If the controller is installed in a living room, you can operate
the heating system, connected ventilation unit and hot water
generation from a living room.
3.4.1 Heating installation
3.4.1.1 Heating
You can use the controller to set the desired temperature for
different times of the day and for different days of the week.
The controller is a weather compensator with a temperature
sensor fitted in the open air. The temperature sensor meas-
ures the outside temperature and sends the values to the
controller. When the outside temperature is low, the control-
ler increases the flow temperature of the Vaillant heating in-
stallation. When the outside temperature rises, the controller
reduces the flow temperature. Thus, the controller reacts to
fluctuations in the outside temperature and, via the flow tem-
perature, keeps the room temperature constantly at the set
desired temperature.
3.4.1.2 Cooling
The room temperature sensor measures the room temper-
ature and forwards the data on to the controller. If the room
temperature is higher than the desired temperature that is
set, the controller reduces the flow temperature.
3.4.1.3 Ventilation
Applies to: Controller version VRC 470/4
If a ventilation unit is connected, the controller supports the
ventilation function.
You can use the controller to set the desired ventilation level
and time for the ventilation.
3.4.1.4 VR 61/4 mixer module
If a VR 61/4 mixer module is connected, the controller can
control two heating circuits:
–two heating circuits independently of each other, e.g.
HEATING 1 in a single-occupancy house and HEATING
2in a guest apartment in this house.
–two heating circuits dependent on each other in a dwell-
ing, e.g. HEATING 1 for radiators and HEATING 2 for
underfloor heating.
3.4.1.5 Hybrid manager
If you have connected a heat pump, the hybrid manager
attempts to cover the declared energy requirement under
the considerations of the cost optimisation and the technical
conditions.
The price-oriented hybrid manager picks the heat generator
on the basis of the rates set in relation to the energy require-
ment.
The bivalence point hybrid manager picks the heat generator
on the basis of the outside temperature.
If the system declares an energy requirement, the hybrid
manager switches on and forwards the energy requirement
to the heat generator. The hybrid manager determines which
heat generator it activates.

4 Operating
8Instructions for use VRC 470 0020116689_01
3.4.2 Hot water generation
You can use the controller to set the temperature and time
for the hot water generation. The heat generator heats the
water in the domestic hot water cylinder until it reaches the
set temperature. You can set a time period during which hot
water should be available in the domestic hot water cylinder.
3.4.3 Circulation
If a circulation pump is installed in the heating installation,
you can set a period for circulation. During the set period, hot
water circulates from the domestic hot water cylinder to the
water taps and back to the domestic hot water cylinder. If, for
example, you turn on a water tap during this time, hot water
will come out of the tap immediately.
3.5 Frost protection function
The frost protection function protects the heating system and
apartment from frost damage. The frost protection function
monitors the outside temperature.
If the outside temperature
–falls below 3 °C, the controller switches the heater on
after a frost protection delay time, and brings the target
room temperature to 5 °C.
–rises above 4 °C, the controller does not switch the
heater on but monitors the outside temperature.
Note
Your competent person will set the frost protection
delay time during the installation.
3.5.1 Enhanced frost protection function
If the heat pump is connected and you have activated the
Cooling operating mode, the additional enhanced frost pro-
tection function is also available.
–If the outside temperature falls below 4 °C for longer than
10 minutes, the controller switches off the Cooling oper-
ating mode.
4 Operating
4.1 Operating structure
4.1.1 Access level for the operator
Through the access level for the operator, you access im-
portant information and set-up options which do not require
any special prior knowledge. Via a menu structure, you can
access configurable or read-only values.
4.1.2 Access level for the skilled tradesman
The skilled tradesman will set further values for the heating
installation via the access level for the skilled tradesman.
The settings may only be made by someone with specialist
knowledge; this level is therefore code-protected.
4.1.3 Menu structure design
The menu structure of the controller is split into four levels.
There are three selection levels and one setting level. From
the basic display, you access selection level 1 and, from
there, you can access the menu structure for one level up or
down. The setting level is accessed from the lowest selection
level.
4.1.4 Basic display
Auto 5,0°C
°C
19,5
15:34
Desired heating temp. 20,0°C
Menu Op. mode
1
3
4
5
9
8
6
7
2
1 Symbol for the current
outside temperature
2 Current outside temperat-
ure
3 Current room temperature
4 Time
5 Current function of the
right-hand selection button
6 Current function of the left-
hand selection button
7 Desired setting (e.g. de-
sired heating temp.)
8 Symbol for Auto operating
mode
9 Operating mode set
The basic display shows the current settings and values of
the heating installation. If you make a setting on the control-
ler, the display on the screen switches from the basic display
to the display with the new setting.
The basic display appears when you:
–press the left-hand selection button and thus exit selec-
tion level 1.
–do not operate the controller for more than 5 minutes.
The basic display shows the key displays heating, cooling
and ventilation and the corresponding operating modes as
well as the status of the time period.
If your heating installation has two independent heating cir-
cuits, the competent person will determine during installation
whether or not the basic display shows the values of HEAT-
ING 1 or HEATING 2.

Operating 4
0020116689_01 VRC 470 Instructions for use 9
4.1.4.1 Symbols for Auto mode
Symbol Meaning
Comfort mode: Within a set time period
Set-back mode: Outside a set time period
4.1.4.2 Soft key function
Both selection buttons have a soft key function. The current
functions of the selection buttons are displayed in the bottom
display line. Depending on the selection level selected in the
menu structure, the list entry or the value, the current func-
tion for the left and right selection buttons may be different.
If, for instance, you press the left-hand function key, the cur-
rent function of the left function key switches from Menu to
Back.
4.1.4.3 Menu
If you press the left-hand selector button, Menu, you switch
from the basic display to selection level 1 of the menu struc-
ture.
4.1.4.4 Operating mode
If you press the right-hand selection button, Operating
mode, you access the settings directly from the basic display
under Operating mode.
4.1.4.5 Desired setting
Depending on the basic setting selected, a different display
text appears, e.g.:
–For the Heating basic setting, Desired Heating temp
appears
–For the Cooling basic setting, Desired Cooling temp
appears
–For the Ventilation basic setting, the ventilation level
appears
–Depending on the operating mode selected, no display
text appears
4.1.5 Selection level
Menu
Information
Desired temperatures
Time programmes
Back Select
1
4
3
2
1 Scroll bar
2 Current functions of the
right and left selection
buttons
3 Selection level list entries
4 Current function or selec-
tion level
Through the selection levels, you navigate to the setting level
in which you wish to read or change settings.
4.1.6 Setting level
HEATING 1
Day
Day Cooling
Back Change
20,0°C
26,0°C
Set-back 15,0°C
1
3
2
5
4
1 Current selection level
2 Values
3 Selection (current selec-
tion)
4 Current functions of the
right and left selection
buttons
5 Setting level
In the setting level, you can select the values you wish to
read or change.
4.2 Operating concept
The controller is operated using two selection buttons and a
rotary knob.
The display shows a highlighted selection level, a setting
level or a highlighted value with white font on a black back-
ground. A flashing, highlighted value means that you can
change the value.
If you do not operate the controller during a period of more
than 5 minutes, the basic display appears again.
4.2.1 Example: Operation in the basic display
From the basic display, you can change the Desired day
temperature directly for the current day by turning the rotary
knob.

4 Operating
10 Instructions for use VRC 470 0020116689_01
Desired day temperature
Only today: 18°C
For permanent change
Press OK
OK
In the display, a request appears asking if you want to
change the Desired day temperature for the current day or
on a permanent basis.
4.2.1.1 To change the Desired day temperature for
the current day only
▶Turn the rotary knob to set the desired temperature.
◁The display switches back to the basic display after
12 seconds. The set desired temperature applies only
until the end of the active time period of the current
day.
4.2.1.2 Changing the Desired day temperature
permanently
1. Turn the rotary knob to set the desired temperature.
2. Press the right-hand selection button, OK.
◁The display switches to the basic display. The new
desired day temperature is applied permanently.
4.2.2 Operating example, changing the date
Auto 5,0°C
°C
19,5
15:34
Desired heating temp. 20,0°C
Menu Op. mode
1. If the display does not show the basic display, press the
left-hand selection button, Back, until the basic display
appears again.
2. Press the left-hand selection button, Menu.
◁The controller is now in selection level 1. The left-
hand selection button now has the function Back
(to go back to the previous level), the right-hand
selection button has the function Select (to select
the highlighted menu option).
Menu
Information
Desired temperatures
Time programmes
Back Select
3. Turn the rotary knob until the Basic settings list entry
is highlighted.
Menu
Days away from home scheduling
Days at home scheduling
Basic settings
Back Select
4. Press the right-hand selection button, Select.
◁The controller is now in selection level 2.
Basic settings
Language
Date/time
Display
Back Select
5. Turn the rotary knob until the Date/Time list entry is
highlighted.
Basic settings
LanguageLanguage
Date/timeDate/time
Display
Back Select
6. Press the right-hand selection button, Select.
◁The controller is now in the Date setting level. The
value for the day is highlighted. The left-hand selec-
tion button now has the function Back (to go back to
the previous level), the right-hand selection button
has the function Change (the value).

Operating and display functions 5
0020116689_01 VRC 470 Instructions for use 11
Date/time
Time
Date
Daylight saving time
:1508
13.03.11
Off
Back Change
7. Press the right-hand selection button, Change.
◁The highlighted value starts to flash; you can now
change the value by turning the rotary knob.
◁The left-hand selection button now has the function
Cancel (the change); the right-hand selection button
has the function OK (to confirm the change).
Date/time
Time
Date
Daylight saving time
:1508
13.03.11
Off
Cancel OK
8. Turn the rotary knob to change the value.
Date/time
Time
Date
Daylight saving time
:1508
14.03.11
Off
Cancel OK
9. Press the right-hand selection button, OK, to confirm
the change.
◁The controller has stored the changed date.
Date/time
Time
Date
Daylight saving time
:1508
14.03.11
Off
Back Change
10. If the highlighted value that is flashing is correct, press
the right-hand selection button OK again.
◁The left-hand selection button now has the function
Back.
11. Press the left-hand selector button Back repeatedly
to revert back to the previous level and to access the
basic display from selection level 1.
4.3 Overview of setting and read-out options
4.3.1 Overview of operating levels
If HEATING 1 and HEATING 2 are referred to in the path
specification in the table, the description of functions applies
to both heating circuits.
Overview of operating levels (→Page 23)
5 Operating and display functions
The path details given at the start of each function descrip-
tion indicate how you reach this function in the menu struc-
ture.
If HEATING 1 and HEATING 2 are referred to in the path
specification, the description of functions applies to both
heating circuits.
You can use the left-hand selection button Menu to set the
operating and display functions.
5.1 Information
5.1.1 Reading the system status
Menu →Information →System status
–The System status option shows you a list of system
parameters and their current settings/levels.
Furthermore, it gives you information on active time peri-
ods (Auto day temp until) and exceptions in the time pro-
grammes, which you may have set with the Days away from
home and Days at home functions.
You can set some values directly under System status,
such as the desired temperatures for Day temp. heating,
Night temp. heating and Day temp. cooling. All other val-
ues are set in other places in the menu structure, as de-
scribed in the following sections.
5.1.2 Reading the list of status messages
Menu →Information →System status →Status
–If no service is required and no errors have occurred, the
value OK is shown next to Status. If a service is required
or an error has occurred, the value Fault is shown next
to Status. In this case, the right-hand selector button has
the function Display. If you press the right-hand selector
button Display, the list of status messages is shown in
the display.
5.1.3 Solar
If a VR 68/2 solar module or a VMS solar pump unit is con-
nected, then additional list entries appear under System
status.
Menu →Information →System status →Collector temp
–This function allows you to read the current temperature
at the collector sensor.
Menu →Information →System status →Solar yield
–This function allows you to read the total solar yield.

5 Operating and display functions
12 Instructions for use VRC 470 0020116689_01
Menu →Information →System status →Reset solar yield
–If you select the setting Yes under function Reset solar
yield and press the right-hand selection button, OK, you
reset the previously totalled solar yield to 0 kWh. After
30 seconds, the setting Yes automatically returns to No.
This only applies for the VR 68/2 solar module.
5.1.4 Heat pump
If a heat pump is connected, additional list entries appear
under System status.
5.1.4.1 Reading the environment yield
Menu →Information →System status →Environment
yield
–This function allows you to read the total environment
yield.
5.1.4.2 Resetting the environment yield
Menu →Information →System status →Reset environ-
ment yield
–If you select the setting Yes under the function Reset
environment yield and press the right-hand selection
button, OK, you reset the previously totalled environment
yield to 0 kWh. After 30 seconds, the setting Yes auto-
matically returns to No.
5.1.4.3 Reading the electrical consumption
Menu →Information →System status →Electrical con-
sumption
–This function allows you to read the total electrical con-
sumption.
5.1.4.4 Resetting the electrical consumption
Menu →Information →System status →Reset electrical
consumption
–If you select the setting Yes under the function Reset
electrical consumption and press the right-hand selec-
tion button, OK, you reset the previously totalled elec-
trical consumption to 0 kWh. After 30 seconds, the set-
ting Yes automatically returns to No.
5.1.5 Read current room air humidity
Menu →Information →System status →Curr. room air
humidity
–You can use this function to read the current room air
humidity. The room air humidity sensor is installed in the
controller.
5.1.6 Reading the current dew point
Menu →Information →System status →Current dew
point
–This function allows you to read the current dew point.
The dew point indicates the temperature at which the
water vapour in the air condenses and settles on objects.
5.1.7 Reading triVAI
Menu →Information →System status →triVAI
–If you have connected a hybrid heat pump, you can use
the triVAI function.
This function allows you to read whether the heat pump,
value greater than 1, or the auxiliary boiler (gas, oil or elec-
tricity), value smaller than 1, is currently covering the energy
requirement.
5.1.8 Reading the solar statistics
Menu →Information →Solar yield
–The diagram under Solar yield shows a comparison of
the monthly solar yields between the previous and the
current year.
–The total yield is displayed on the bottom right. The
highest value achieved in one month for the last two
years is displayed in the top right.
5.1.9 Reading the environmental statistics
Menu →Information →Environment yield
–The diagram under Environment yield shows a com-
parison of the monthly environment yields between the
previous and the current year.
–The total yield is displayed on the bottom right. The
highest value achieved in one month for the last two
years is displayed in the top right.
5.1.10 Reading the power statistics
Menu →Information →Electrical consumption
–The diagram under Electrical consumptn shows a com-
parison of the monthly consumption of electricity between
the previous and the current year.
–The total yield is displayed on the bottom right. The
highest value achieved in one month for the last two
years is displayed in the top right.
5.1.11 Read skilled tradesman contact details
Menu →Information →Contact details
–If the skilled tradesman entered their company name and
telephone number during the installation, you can read
this data under Contact details.
5.1.12 Reading the serial number and article
number
Menu →Information →Serial number
–Serial number shows the serial number of the control-
ler, which the competent person may require you to tell

Operating and display functions 5
0020116689_01 VRC 470 Instructions for use 13
him. The article number is found in the second line of the
serial number.
5.2 Settings
5.2.1 Setting desired temperatures
This function is used to set the desired temperatures for the
heating circuit and hot water generation.
If a VR 61/4 mixer module is connected, HEATING 2 also
appears under Desired temperatures.HEATING 2 has the
same read-out options and settings as HEATING 1.
If a heat pump is connected and the cooling function is avail-
able, the HEATING 1 and, where required, HEATING 2 dis-
plays also show the entry Day cooling.
5.2.1.1 Heating circuit
Caution.
Risk of damage due to frost.
If rooms are not adequately heated, this may
cause damage to the building and to the
heating installation.
▶If you are absent during a frosty spell, en-
sure that the heating installation remains
in operation and provides adequate frost
protection.
Menu →Desired temperatures →HEATING 1 and if neces-
sary HEATING 2
–You can set different desired temperatures for the heat-
ing circuit:
Heating
The desired Day temperature is the temperature you wish to
have in the rooms during the day or when you are at home
(Comfort mode). The desired Set-back is the temperature
that you wish to have in the rooms during the night or when
you are away from home (Set-back mode).
Cooling
The desired Day cooling temperature is the temperature
you wish to have in the rooms during the day or when you
are at home (Comfort mode).
5.2.1.2 Hot water generation
Danger!
Risk of being scalded by hot water.
There is a danger of scalding at the hot wa-
ter draw-off points if the temperatures are
greater than 60 °C. Young children and eld-
erly persons are particularly at risk, even at
lower temperatures.
▶Select the temperature so that nobody is
at risk.
Menu →Desired temperatures →Domestic hot water
–You can only use the controller's functions and setting
options for hot water generation if a domestic hot water
cylinder is connected to the heating installation.
You can set the desired Hot water circuit temperature for
the hot water circuit.
5.2.2 Setting the ventilation level
Applies to: Controller version VRC 470/4
Menu →Ventilation level
–You can use the controller's functions and setting options
for ventilation if a ventilation unit is connected to the heat-
ing installation.
This function allows you to set how quickly the used room air
is replaced with fresh outside air.
The Max. day ventilation level ventilation level ensures the
rate of exchange of air that you want in rooms during the day
or when you are at home (comfort mode). The Max. set-
back ventilation level ventilation level ensures the rate of
exchange of air that you want in rooms during the night or
when you are not at home (set-back mode). The instructions
for use for the ventilation unit explain how the ventilation unit
works with the ventilation levels.
5.2.3 Setting time programmes
5.2.3.1 Displaying time periods for one day
18:0016:30 22:30
16 °
21 °
Temperature
Time
Desired
day
temperature
20:00
Period 1
Period 2
Desired
day
temperature
Desired
night
temperature
Desired night temperature
The Time programmes function can be used to set the time
period for the heating circuit, ventilation unit, hot water gen-
eration and circulation pump.
If you have not set any time periods, the controller uses the
time periods set in the factory settings.
If a VR 61/4 mixer module is connected, the Time pro-
grammes display also shows HEATING 2.HEATING 2 has
the same read-out options and settings as HEATING 1.
If a heat pump is connected and the cooling function is avail-
able, the Time programmes display also shows the Heating
circuit 1: Cooling and, where required, Heating circuit 2:
Cooling.

5 Operating and display functions
14 Instructions for use VRC 470 0020116689_01
Applies to: Controller version VRC 470/4
If a ventilation unit is connected and ventilation is available,
an additional list entry appears under Time programmes.
5.2.3.2 Setting time periods for days and blocks
For each day and block, you can set up to three time peri-
ods.
The time periods set for a day have priority over the time
periods set for a block.
Desired temperature Day: 21 °C
Desired temperature Night: 16 °C
Time period 1: 06.00 - 08.00
Time period 2: 16.30 - 18.00
Time period 3: 20.00 - 22.30
Within the time periods, the controller brings the room tem-
perature to the set desired Day temperature (Comfort mode).
Outside the time period, the controller brings the room tem-
perature to the set desired Set-back temperature (Set-back
mode).
5.2.3.3 Setting time programmes quickly
If, for example, you require a different time period for just
one working day in the week, first set the times for the entire
block Monday - Friday". Then set the different time period
for the working day.
5.2.3.4 Displaying and changing different times in
the block
Monday - Sunday
Period 1:
Period 2:
Period 3:
!! : !! - !! : !!
!! : !! - !! : !!
!! : !! - !! : !!
Back Select
If you view a block in the display and have defined a different
period for a day in this block, then the display indicates the
different times in the block with !!.
Individual dates vary from
the selected time programme
Mo-Su.
OKBack
If you press the right-hand selection button Select, a mes-
sage appears on the display which informs you about differ-
ent periods. You do not need to adjust the times.
The set times for the block marked with !!can be viewed and
changed if you press the right-hand selection button OK in
the display.
5.2.3.5 For the heating circuit
Menu →Time programmes →HEATING 1 and, where re-
quired, HEATING 2
–The time programmes are only effective in the Auto-
matic mode (→Page 18). In each set time period, the
desired temperature that you set in the Desired tem-
peratures function applies. Within the time period, the
controller switches to Comfort mode and the heating cir-
cuit heats the connected rooms up to the desired Day
temperature. Outside that time period, the controller
switches to the operating mode that the competent per-
son has set: Frost protection, Eco or Night temperature.
Set the time period for the heating circuit so that each time
period:
–starts approx. 30 minutes before the time at which the
rooms should reach the desired Day temperature.
–ends approx. 30 minutes before the time at which the
rooms should reach the desired Set-back temperature.
Note
The competent person can set a pre-heat time
and a pre-switch-off time for the heating circuit,
so that you can set the time period for the desired
Day and Set-back temperatures exactly to the
times at which the room temperature should reach
the desired temperature. Ask the competent per-
son whether he has set a pre-heat time or a pre-
switch-off time.
5.2.3.6 For the cooling
Menu →Time programmes →Heating circuit 1: Cooling
and, where required, Heating circuit 2: Cooling
–The time programmes are effective in Cooling mode and
in the Manual cooling advanced functions. In each set
time period, the desired temperature that you set in the
Desired temperatures function applies. Within the time
period, the heating circuit cools the living rooms to the
desired Day cooling temperature. The heating circuit is
not cooled outside of this time period.

Operating and display functions 5
0020116689_01 VRC 470 Instructions for use 15
5.2.3.7 For hot water generation
Menu →Time programmes →Domestic hot water →Pre-
paration
–You can only use the controller's functions and setting
options for hot water generation if a domestic hot water
cylinder is connected to the heating installation.
For hot water generation, the time programmes are only ef-
fective in Automatic mode.
In each time period set, the desired Domestic hot water
temperature applies. At the end of a time period, the control-
ler switches the hot water generation off until the start of the
next time period.
Set the time periods for hot water generation so that each
time period:
–starts approx. 30 minutes before the time at which the
water in the domestic hot water cylinder should have
reached the desired Hot water circuit temperature.
–ends approx. 30 minutes before the time at which you no
longer need any hot water.
5.2.3.8 For circulation
Menu →Time programmes →Domestic hot water →Cir-
culation
–You can only use the controller's functions and setting
options for circulation if secondary returns and a circula-
tion pump are connected to the heating installation.
For circulation, the time programmes are only effective in
Automatic mode. The set time periods determine the oper-
ating times for circulation. Within the time period, the circula-
tion is switched on. Outside the time period, the circulation is
switched off.
Set the time periods for circulation so that each time period:
–starts approx. 30 minutes after the start of a time period
for hot water generation,
–ends approx. 30 minutes before the end of a time period
for hot water generation.
5.2.3.9 For the high tariff periods
Menu →Time programmes →Tariff periods
–If a heat pump is connected to the heating installation
and the price-oriented hybrid manager is selected, you
can use the functions and setting options of the controller
for the high-tariff periods.
The times of high tariff depend on your energy supplier.
5.2.3.10 For the noise reduction periods
Menu →Time programmes →Noise reduction periods
–If a heat pump is connected to the heating installation,
you can use the functions and setting options of the con-
troller for the noise reduction periods
You can reduce the rotational speed of the heat pump's fan.
A reduction in the fan speed also negatively affects the heat-
ing output, particularly at low outside temperatures. The effi-
ciency of the heat pump system is reduced.
5.2.3.11 For ventilation
Applies to: Controller version VRC 470/4
Menu →Time programmes →Ventilation
–If a ventilation unit is connected and ventilation is avail-
able, the Ventilation entry also appears under time pro-
grammes.
The time programmes are only effective in Automatic mode.
In each time period set, the ventilation level that you have
set with the Ventilation function applies. Within the time
period, the controller regulates the ventilation unit to a max-
imum of Max. day ventilation level. Outside the time period,
the controller regulates the ventilation unit to a maximum of
Max. set-back ventilation level.
5.2.4 Days away from home scheduling
Menu →Day away from home scheduling →HEATING 1
and if necessary HEATING 2
–You can use this function to set a period with a start and
end date and a temperature for days during which you
are away from home. Thus, you do not need to change
time periods for which you have set, for example, no re-
duction of the desired temperature over the course of the
day.
Frost protection is activated.
While the Days away from home scheduling function is
activated, it has priority over the set operating mode. At the
end of the specified period, or if you cancel the function, the
heating installation returns to the pre-set mode.
When cooling is available, the Cooling function is switched
off.
Note
Cooling remains switched on if required by na-
tional law. In this case, the competent person ad-
justs your heating installation in such a way that
the Cooling function remains switched on at the
temperature desired during your absence.
Applies to: Controller version VRC 470/4
When the ventilation unit is connected and ventilation is
available, ventilation is set to the lowest level.

5 Operating and display functions
16 Instructions for use VRC 470 0020116689_01
5.2.5 Days at home scheduling
Menu →Day at home scheduling →HEATING 1 and if ne-
cessary HEATING 2
–In the specified period, the heating installation works in
Automatic mode and uses the day settings for Sunday,
which were set using the Time programmes function.
At the end of the specified period, or if you cancel the
function, the heating installation returns to the pre-set
mode.
5.2.6 Language selection
Note
During installation, the skilled tradesman sets the
desired language. All functions are displayed in
the set language.
Menu →Basic settings →Language
–If the language of e.g. a service technician differs from
the set language, you can change the language using
this function.
Caution.
It may not be possible to operate the con-
troller if the wrong language is selected.
If you select a language that you do not un-
derstand, you can no longer read the text in
the controller display and can no longer oper-
ate the controller.
▶Only select a language that you under-
stand.
However, if the text in the display should appear in a lan-
guage that you do not understand, you can set a different
language.
5.2.6.1 Setting a language that you understand
1. Press the left-hand selection button repeatedly until the
basic display appears.
2. Press the left-hand selection button again.
3. Rotate the rotary knob clockwise until the dotted line
appears.
4. Turn the rotary knob anti-clockwise until the second list
entry above the dotted line is highlighted.
5. Press the right-hand selection button twice.
6. Turn the rotary knob until you find a language that you
understand.
7. Press the right-hand selection button.
5.2.7 Setting the date
Menu →Basic settings →Date/Time →Date
–Select this function to set the current date. All controller
functions that contain a date relate to the set date.
5.2.8 Setting the time
Menu →Basic settings →Date/Time →Time
–Select this function to set the current time. All controller
functions that contain a time relate to the set time.
5.2.9 Changing over to daylight saving time
Menu →Basic settings →Date/Time →Daylight saving
–You can use this function to set whether the controller
automatically changes over to daylight saving time, or
whether you want to do this manually.
–Auto: The controller automatically changes over to day-
light saving time.
–Off: You have to change over to daylight saving time
manually.
Note
Daylight saving time means Central European
summer time: Start = last Sunday in March, End =
last Sunday in October.
If the external sensor is equipped with a DCF77 receiver, the
daylight saving time setting is irrelevant.
5.2.10 Setting the display contrast
Menu →Basic settings →Display →Display contrast
–You can set the display contrast in relation to the bright-
ness of the surroundings, to ensure that the display is
clearly legible.
5.2.11 Setting the preferred display
Menu →Basic settings →Display →Preferred display
–With this function, you can choose whether to see the
data for heating, cooling or ventilation in the basic
display.
5.2.12 Setting the offset room temperature
Menu →Basic settings →Offset →Room temperature
–The controller can show the current room temperature if it
is installed in a living room.
A thermometer is integrated in the controller for measuring
the room temperature. If you have another thermometer in
the same room and compare the values with each other, the
temperature values may constantly differ from each other.
Example
One room thermometer constantly shows a temperature that
is one degree higher than the current room temperature on
the controller display. With the Room temperature func-
tion, you can offset the temperature difference in the con-
troller display by setting a correction value of +1 K (1 K cor-
responds to 1 °C). K (Kelvin) is a unit for the temperature
difference. Inputting a correction value affects the room tem-
perature compensator.

Operating and display functions 5
0020116689_01 VRC 470 Instructions for use 17
5.2.13 Setting the offset outside temperature
Menu →Basic settings →Offset →Outside temperature
–The thermometer in the controller's external sensor
measures the outside temperature. If you have fitted
another thermometer in the outside area and compare
the temperature values with each other, the temperature
values may constantly differ from each other.
Example
Your weather station constantly shows an outside temperat-
ure that is one degree higher than the current outside tem-
perature on the controller display.
With the Outside temperature function, you can offset the
temperature difference in the controller display by setting a
correction value of -1 K (1 K corresponds to 1 °C). K (Kelvin)
is a unit for the temperature difference.
Inputting a correction value affects the weather com-
pensator.
5.2.14 Setting the cooling offset
Menu →Basic settings →Offset →Cooling
–If a heat pump is connected and cooling is available, you
can use the Cooling offset function.
Cooling is only possible if the outside temperature is higher
than the target room temperature for the cooling minus the
cooling offset.
Example
If you want the temperature in the living room to be 24 °C,
you have set this temperature as the Desired cooling temp,
and the cooling offset is set to 5 K, the cooling function is
only activated once the outside temperature reaches 19 °C.
5.2.15 Setting costs
If the heat pump is connected and the competent person
has selected the price-oriented hybrid manager, the price-
oriented hybrid manager evaluates the factor/value that was
entered for the auxiliary boiler, the high tariff and the low
tariff, and actuates the heat generator from the viewpoint of
cost optimisation.
You must specify all tariffs in the unit of currency per kWh for
the calculation to be correct.
If your energy provider specifies the gas and electricity rate
in the unit of currency per m3, ask for the precise gas and
electricity rate in the unit of currency per kWh.
Round the amount up or down to one decimal place.
Example
Costs Setting/factor
Auxiliary boiler
(Gas, oil, electri-
city)
11.3 currency
units/kWh
113
Low electricity
tariff
(heat pump)
14.5 currency
units/kWh
145
Costs Setting/factor
High electricity
tariff
(heat pump)
18.7 currency
units/kWh
187
5.2.15.1 Setting the tariff for the auxiliary boiler
Menu →Basic settings →Costs →Auxiliary boiler
–The factor/value that is set requires the hybrid manager
to calculate costs correctly.
To set the correct factor/value, you must ask your energy
provider what your gas and electricity tariff is.
5.2.15.2 Setting the low electricity tariff
Menu →Basic settings →Costs →Low electricity tariff
–The factor/value that is set requires the hybrid manager
to calculate costs correctly.
To correctly set the Low electricity tariff, you must ask your
energy supplier what your electricity rate is.
5.2.15.3 Setting the high electricity tariff
Menu →Basic settings →Costs →High electricity tariff
–The factor/value that is set requires the hybrid manager
to calculate costs correctly.
To correctly set the High electricity tariff, you must ask
your energy supplier what your electricity rate is.
5.2.16 Activating heat recovery
Applies to: Controller version VRC 470/4
Menu →Basic settings →Heat recovery
–If a ventilation unit with heat recovery is connected, you
can use the Heat recovery function.
The Heat recovery function is normally set to Auto, which
means that internal regulation checks whether heat recov-
ery makes sense, or whether external air can be guided dir-
ectly into the living room. For more information, see the re-
coVAIR.../4 instructions for use.
If you have selected Activate, heat recovery will be used
constantly.
5.2.17 Setting the room air humidity
Menu →Basic settings →Room air humidity →
–If the room air humidity exceeds the value set, a connec-
ted dehumidifier is activated. As soon as the value drops
below the value that is set, the dehumidifier switches off
again.
5.2.18 Changing heating circuit naming
Menu →Basic settings →Change heating circuit naming

5 Operating and display functions
18 Instructions for use VRC 470 0020116689_01
–You can now modify the factory-specified heating circuit
names as you wish. The name is limited to 10 characters.
5.2.19 Resetting to factory setting
You can reset the settings for the Time programmes or for
Everything to the factory setting.
Menu →Basic settings →Factory reset →Time
programmes
–With Timer programs, you reset all the settings you
have made in the Timer programs function to the de-
fault setting. All other settings that include times, such as
Date/Time, are not affected.
While the controller is resetting the timer program settings to
the default settings, In process is shown on the display. The
basic display is then displayed.
Caution.
Risk of a malfunction.
The Everything function restores all settings
to the factory settings, including those set by
the skilled tradesman. It may be the case that
it is no longer possible to operate the heating
installation after this.
▶Arrange for the skilled tradesman to reset
all settings to factory settings.
Menu →Basic settings →Factory reset →Everything
–While the controller is resetting the settings to the factory
settings, in process is shown on the display. Then the
installation assistant appears in the display, which only
the skilled tradesman may operate.
5.2.20 Installer level
The Installer level is reserved for the skilled tradesman and
is therefore protected by an access code. At this operating
level, the skilled tradesman can make the necessary set-
tings.
5.3 Operating modes
Use the right-hand selector button, Operating mode to set
the mode directly.
If the heating installation is equipped with two heating cir-
cuits, the set operating mode only applies to the heating cir-
cuit preset by the skilled tradesman.
If you want to set different operating modes for two inde-
pendent heating circuits, you can also set the operating
mode using the left-hand selector button Menu. The Operat-
ing mode list entry in which the heating circuits are listed
appears under Basic settings. In this case, you can set the
operating mode separately for each heating circuit.
The path details given at the start of each mode description
indicate how you can access this mode in the menu struc-
ture.
5.3.1 Operating modes for the heating circuit
5.3.1.1 Automatic mode
Operating mode →Heating →Auto
Menu →Basic settings →Operating mode →HEATING 1
and, if relevant, HEATING 2 →Auto
–The automatic mode controls the heating circuit in ac-
cordance with the set desired temperature and the set
time periods.
Within the time periods, the controller brings the room tem-
perature to the set desired Day temperature (Comfort mode).
Outside the time periods, the controller regulates in accord-
ance with the mode set by the competent person.
Three modes are possible:
–ECO (factory setting): The heating function is switched
off and the controller monitors the outside temperature.
If the outside temperature falls below 3 °C, the controller
switches the heating function on after the end of the frost
protection delay time and brings the room temperature
to the set desired Set-back (Set-back mode). Despite
the heating function being activated, the burner is only
active on demand. If the outside temperature rises above
4 °C, the controller switches the heating function off, but
continues to monitor the outside temperature.
–Frost protection: The heating function is off and the frost
protection function is active.
–Set-back temperature: The heating function is on and
the controller brings the room temperature to the set de-
sired Set-back (Set-back mode). When installing your
controller, the competent person can specify the control
functions for the times outside the periods and can spe-
cify the heating curve.
5.3.1.2 Comfort mode
Operating mode →Heating →Day
Menu →Basic settings →Operating mode →HEATING 1
and, if relevant, HEATING 2 →Day
–The Day operating mode brings the heating circuit to the
desired Day temperature set, without taking time periods
into account.
5.3.1.3 Set-back mode
Operating mode →Heating →Set-back
Menu →Basic settings →Operating mode →HEATING 1
and, if relevant, HEATING 2 →Set-back
–The Set-back operating mode brings the heating circuit
to the desired Set-back temperature set, without taking
time periods into consideration.

Operating and display functions 5
0020116689_01 VRC 470 Instructions for use 19
5.3.1.4 Summer mode
Operating mode →Heating →Summer
Menu →Basic settings →Operating mode →HEATING 1
and, if relevant, HEATING 2 →Summer
–The heating function is switched off for the heating circuit
and the frost protection function is active.
5.3.2 Operating modes for ventilation
Applies to: Controller version VRC 470/4
If a ventilation unit is connected, you can set the operating
modes directly using the right-hand selection button Operat-
ing mode.
The instructions for use for the ventilation unit explain how
the ventilation unit works with the ventilation levels.
5.3.2.1 Automatic mode
Operating mode →Ventilation →Auto
–The automatic mode controls the ventilation in accord-
ance with the ventilation level set and the set time peri-
ods.
Within the time periods, the controller regulates the
exchange of air using the Max. day ventilation level
ventilation level set (Comfort mode).
Outside the time periods, the controller regulates the ex-
change of air using the Max. set-back ventilation level
ventilation level set (Night set-back mode).
5.3.2.2 Comfort mode
Operating mode →Ventilation →Day
–The Day operating mode regulates the exchange of air
using the Max. day ventilation level ventilation level set,
without taking time periods into account.
5.3.2.3 Set-back mode
Operating mode →Ventilation →Set-back
–The Night set-back operating mode regulates the ex-
change of air using the Max. night set-back ventilation
level, without taking time periods into account.
5.3.3 Operating modes for hot water generation
5.3.3.1 Automatic mode
The automatic mode controls hot water generation in accord-
ance with the set desired temperature for Domestic hot wa-
ter and the set time periods.
Within the time period, hot water generation is switched on
and maintains the hot water in the DHW cylinder at the pre-
set temperature. Outside the time period, hot water genera-
tion is switched off.
5.3.3.2 Comfort mode
The comfort mode controls the hot water generation in ac-
cordance with the set desired temperature for Hot water cir-
cuit without taking time periods into account.
5.3.3.3 Set-back mode
Hot water generation is switched off and the frost protection
function is activated.
5.3.4 Operating modes for circulation
The operating mode for the circulation always corresponds
to the operating mode for the hot water generation. You can-
not set a different operating mode.
5.3.4.1 Automatic mode
The automatic mode controls the circulation of the hot water
in the hot water pipes in accordance with the set time peri-
ods. Within the time period, the circulation is switched on
and outside the time period, the circulation is switched off.
5.3.4.2 Comfort mode
Circulation is activated and the time periods for circulation
are not observed.
5.3.4.3 Set-back mode
The circulation is switched off and the Frost protection func-
tion is active.
5.3.5 Operating modes for cooling
Applies to: Controller version VRC 470/4
If a heat pump is connected and automatic cooling is ac-
tivated, you can set the operating modes directly using the
right-hand Operating mode selection button.

5 Operating and display functions
20 Instructions for use VRC 470 0020116689_01
5.3.5.1 Automatic mode
Operating mode →Cooling →Auto
–The automatic mode controls the heating circuit in ac-
cordance with the set desired temperature and the set
time periods.
Within the time periods, the controller brings the room tem-
perature to the desired Day cooling temperature set (com-
fort mode).
Outside the time period, the cooling function is switched off.
5.3.5.2 Comfort mode
Operating mode →Cooling →Day
–The Day operating mode brings the heating circuit to the
desired Day cooling temperature set, without taking time
periods into account.
5.3.5.3 Off
The cooling function is switched off.
5.4 Advanced functions
The advanced functions can be activated directly from any
mode using the right-hand selector button Operating mode.
If the heating installation is equipped with two heating cir-
cuits, the active advanced function only applies to the heat-
ing circuit preset by the skilled tradesman.
If the heating installation is equipped with two heating cir-
cuits and both circuits are active, you can also activate an
advanced function using the left-hand selector button Menu.
The Operating mode list entry in which the heating circuits
are listed appears under Basic settings. In this case, you
can set the advanced function separately for each heating
circuit.
The path details given at the start of each advanced function
description indicate how you can access this advanced func-
tion in the menu structure.
5.4.1 Manual cooling
Operating mode →Manual cooling
–If the outside temperature is high, you can activate the
Manual cooling advanced function. You define for how
many days you want to activate the advanced function. If
you activate Manual cooling, you cannot use the heating
function at the same time. The Manual cooling function
takes priority over heating.
The setting applies for as long as the advanced function is
active. The advanced function is deactivated if the days that
are set have elapsed or if the outside temperature falls below
4 °C.
If a VR 61/4 mixer module is connected, the Desired tem-
peratures display also shows the HEATING 2 list entry.
If you want to set the temperature separately for each of the
heating circuits, you can set these temperatures using the
Desired temperatures function.
5.4.2 1 day at home
Operating mode →1 day at home
Menu →Basic settings →Operating mode →HEATING 1
and, where required, HEATING 2 →1 day at home
–If you are spending a weekday at home, activate the 1
day at home advanced function. This advanced function
activates Automatic mode for one day with the settings
for Sunday, as set using the Time programmes func-
tion.
The advanced function is automatically deactivated after
00:00 (midnight) or if you cancel the advanced function first.
The heating installation will then return to the pre-set mode.
5.4.3 1 day away from home
Operating mode →1 Day away from home
Menu →Basic settings →Operating mode →HEATING 1
and, where required, HEATING 2 →1 Day away from home
–If you are only away from home for one day, activate
the 1 day away from home advanced function. This
advanced function brings the room temperature to the
desired Set-back temperature.
Hot water generation and circulation are switched off and the
frost protection is activated.
The advanced function is automatically deactivated after
00:00 (midnight) or if you cancel the advanced function first.
The heating installation will then return to the pre-set mode.
Applies to: Controller version VRC 470/4
Ventilation is activated and works at the lowest ventilation
level.
5.4.4 Ventilation boost
Operating mode →Ventilation boost
Menu →Basic settings →Operating mode →HEATING 1
and, where required, HEATING 2 →Ventilation boost
–If you want to switch the heating circuit off while the liv-
ing rooms are being ventilated, activate the Ventilation
boost advanced function.
This advanced function switches the heating circuit off for 30
minutes. The Frost protection function is activated, the vent-
ilation unit works at the highest ventilation level, and hot wa-
ter generation and circulation remain active. The advanced
function is automatically deactivated after 30 minutes or if
you cancel the advanced function early. The heating installa-
tion will then return to the pre-set mode.
5.4.5 Party function
Operating mode →Party function
Menu →Basic settings →Operating mode →HEATING 1
and, where required, HEATING 2 →Party function
–If you want to switch on the heating circuit, hot water gen-
eration, ventilation and circulation temporarily, activate
the Party function advanced function.