Vaillant VRT 350f User manual

en Operating instructions
VRT 350f
0020131979_01 - 13.12.2021

2Operating instructions 0020131979_01
Operating instructions
Contents
1 Safety .................................................................... 3
1.1 Action-related warnings ......................................... 3
1.2 Intended use .......................................................... 3
1.3 General safety information .................................... 4
2 Notes on the documentation .............................. 7
2.1 Observing other applicable documents ................. 7
2.2 Storing documents................................................. 7
2.3 Validity of the instructions...................................... 7
3 Product description............................................. 7
3.1 Unit design............................................................. 7
3.2 Control function...................................................... 8
3.3 Frost protection function ........................................ 9
3.4 Identification plate.................................................. 9
3.5 Serial number ........................................................ 9
3.6 CE marking ............................................................ 9
4 Operation.............................................................. 9
4.1 Operating structure................................................ 9
4.2 Operating concept ............................................... 12
5 Operating and display functions...................... 15
5.1 Information........................................................... 15
5.2 Settings................................................................ 16
5.3 Operating modes ................................................. 22
5.4 Special operating modes ..................................... 24
5.5 Messages ............................................................ 25
6 Troubleshooting ................................................ 26
6.1 Detecting and rectifying faults ............................. 26
7 Care and maintenance ...................................... 27
7.1 Caring for the product.......................................... 27
7.2 Changing batteries............................................... 27
8 Decommissioning.............................................. 29
8.1 Replacing the control........................................... 29
8.2 Recycling and disposal........................................ 29
9 Guarantee and customer service..................... 29
9.1 Guarantee............................................................ 29
9.2 Customer service................................................. 29
Appendix ............................................................................ 30
A Overview of operating levels............................ 30
Index ................................................................................... 36

0020131979_01 Operating instructions 3
1 Safety
1.1 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 symbols
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
1.2 Intended use
In the event of inappropriate or improper use,
damage to the product and other property
may arise.
The product controls a heating installation
with a Vaillant heat generator with an eBUS
interface in a way that is weather-controlled
and time-dependent.
Intended use includes the following:
–observance of the operating instructions
included for the product and any other in-
stallation components
–compliance with all inspection and main-
tenance conditions listed in the instruc-
tions.
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.
Caution.
Improper use of any kind is prohibited.

4Operating instructions 0020131979_01
1.3 General safety information
1.3.1 Danger caused by improper
operation
Improper operation may present a danger to
you and others, and cause material damage.
▶Carefully read the enclosed instructions
and all other applicable documents, par-
ticularly the "Safety" section and the warn-
ings.
▶Only carry out the activities for which in-
structions are provided in these operating
instructions.
1.3.2 Risk of scalding from hot 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 target temperature.
1.3.3 Danger caused by a malfunction
▶Ensure that room air can circulate freely
around the control, and that the control is
not covered by furniture, curtains or other
objects.
▶Ensure that all radiator valves in the room
where the control is installed are fully open.
▶Only operate the heating installation when
it is in a technically perfect condition.
▶Ensure that any faults and damage that
may negatively affect safety are eliminated
immediately.
1.3.4 Risk of material damage caused by
frost
▶Ensure that the heating installation always
remains in operation during freezing con-
ditions and that all rooms are sufficiently
heated.
▶If you cannot ensure the operation, have a
competent person drain the heating install-
ation.

0020131979_01 Operating instructions 5
1.3.5 Frost damage caused by switching
the unit 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 power grid.
▶Leave the heating installation main switch
in the "1" position.
1.3.6 Frost damage caused by excessively
low room temperature
If the room temperature is set too low in indi-
vidual rooms, sections of the heating installa-
tion might be damaged by frost.
▶If you are absent during a frosty spell, en-
sure that the heating installation remains in
operation and the rooms are warmed ad-
equately.
▶Please note the frost protection function.
1.3.7 Batteries
▶Note the battery type, as described in
these instructions; see section "Data plate".
▶Remove and insert batteries as described
in these instructions; see section "Chan-
ging the batteries".
▶Do not recharge non-rechargeable batter-
ies.
▶Remove rechargeable batteries from the
product before charging them.
▶Do not combine batteries with other battery
types.
▶Do not combine new and used batteries.
▶Insert the batteries, making sure that the
poles are the right way round.
▶Remove the dead batteries from the
product and dispose of them correctly.
▶Remove the batteries if you intend to store
the product and not use it for an extended
period and/or to scrap it.
▶Do not short-circuit the connection contacts
in the product's battery compartment.

6Operating instructions 0020131979_01
1.3.8 Risk of material damage caused by
acid
▶Remove any dead batteries from the
product and dispose of these properly.
▶Remove the batteries if you intend to store
the product and not use it for an extended
period.
1.3.9 Danger!
▶Risk of burns!
▶Risk of electric shock!
▶For units that are connected to the grid.
▶Before installing the unit, carefully read
through the installation instructions.
▶Before starting up the unit, carefully read
through the operating instructions.
▶Observe the maintenance regulations in
the operating instructions.

0020131979_01 Operating instructions 7
2 Notes on the documentation
2.1 Observing other applicable documents
▶Always observe all operating instructions enclosed with
the installation components.
2.2 Storing documents
▶Store these instructions and all other applicable docu-
ments for further use.
2.3 Validity of the instructions
These instructions apply only to:
Product article number
VRT 350f 0020124482
3 Product description
3.1 Unit design
7
1
2
3
4
6
5
1 Wall-mounting base with
bracket
2 Display
3 Diagnostics socket
4 Wall-mounting base
cover

8Operating instructions 0020131979_01
5 Right-hand selection
button
6 Rotary knob
7 Left-hand selection
button
4
3
1
2
1 Wall-mounting base
2 Diagnostics socket
3 LED
4 Teach-in button
3.2 Control function
The control controls the Vaillant heating installation and do-
mestic hot water generation of a connected domestic hot wa-
ter cylinder.
If the control is installed in a living room, you can operate the
heating installation and domestic hot water generation from a
living room.
3.2.1 Heating installation
The controller is a room-temperature-controlled controller
and must be installed in the living room. You can use the
controller to set a desired temperature for different times of
the day and for different days of the week. The temperature
sensor measures the room temperature and forwards the val-
ues to the controller. At lower room temperatures, the con-
troller switches the heat generator on. Once the room tem-
perature reaches the desired set temperature, the control-
ler switches the heat generator off. The controller therefore
reacts to the fluctuations of the room temperature and con-
stantly controls the room temperature to the temperature that
you have set.
The controller is powered by batteries. Data transmission
between the controller and the radio receiver unit takes place
via radio communication. Data transmission between the
radio receiver unit and the boiler takes place via an eBUS
interface, which also provides the power supply for the radio
receiver unit.
Data communication and the power supply for the con-
troller is provided via eBUS interface. The controller can

0020131979_01 Operating instructions 9
be equipped with the Vaillant diagnostics software and
the Vaillant Internet communication system for remote
diagnostics and remote settings.
3.2.2 Domestic hot water generation
You can use the control to set the temperature and time for
domestic 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.
3.3 Frost protection function
The frost protection function protects the heating system and
apartment from frost damage.
The frost protection function monitors the room temperature.
If the room temperature
–falls below 5 °C, the controller switches the heater on and
controls the system to a target room temperature of 5 °C.
–exceeds 5 °C, the heater is switched off but the room
temperature monitoring remains active.
3.4 Identification plate
The identification plate is located on the rear panel of the
controller casing.
3.5 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.
3.6 CE marking
The CE marking shows that the products comply with the
basic requirements of the applicable directives as stated on
the declaration of conformity.
The manufacturer hereby declares that the type of radio
equipment that is described in these instructions complies
with Directive 2014/53/EU. The complete text for the EU De-
claration of Conformity is available at: http://www.vaillant-
group.com/doc/doc-radio-equipment-directive/.
4 Operation
4.1 Operating structure
4.1.1 Adjustment and display levels
The product has two adjustment and display levels.
The end user level contains information and setting options
that you require as the end user.

10 Operating instructions 0020131979_01
Overview of operating levels (→Page 30)
The installer level is reserved for the competent person. It is
protected by a code. Only competent persons may change
any settings in the installer level.
4.1.2 Menu structure design
The menu structure of the controller is split into three levels.
There are two selection levels and one setting level. From
the basic display, you can 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.
4.1.3 Basic display
Auto 01.07.11
°C
19,5
15:34
Desired temperature 20,0°C
Menu Mode
1
2
3
4
8
7
5
6
1 Date 2 Current room temperat-
ure
3 Time
4 Current function of the
right-hand selector but-
ton (soft key function)
5 Current function of the
left-hand selector button
(soft key function)
6 Desired temperature
7 Symbol for heating
mode in Auto mode
8 Mode set for the heating
mode
The control is battery-powered. To save power and thus ex-
tend the service life of the batteries, the display is normally
switched off. If you press one of the selection buttons or turn
the rotary knob, the background lighting switches on and the
basic display appears. At this point, you have not changed
any settings. Only if you press one of the selection buttons or
turn the rotary knob when the display or background lighting
is switched on are the settings changed.
The basic display shows the current settings and values of
the heating installation. If you make a setting on the control,
the display on the screen switches from the basic display to
the display for the new setting.
The background lighting goes out approx. 10 seconds after
the last operation. The display switches off approx. 1 minute
after the last operation.
4.1.3.1 Symbols for the Auto operating mode
Symbol Meaning
Day mode: Within a set time period
Night mode: Outside a set time period