Vaillant VRT 350f User manual

en Installation instructions
VRT 350f
0020131978_02 - 16.08.2022

2Installation instructions 0020131978_02
Installation instructions
Contents
1 Safety .................................................................... 4
1.1 Action-related warnings ......................................... 4
1.2 Intended use .......................................................... 4
1.3 General safety information .................................... 5
1.4 Regulations (directives, laws, standards) .............. 6
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 Identification plate.................................................. 7
3.2 CE marking ............................................................ 7
4 Installation............................................................ 8
4.1 Scope of delivery ................................................... 8
4.2 Fitting the radio receiver unit in the boiler.............. 8
4.3 Fit the radio receiver unit in the living room........... 9
4.4 Fitting the radio control ........................................ 11
5 Electrical installation......................................... 12
5.1 Radio receiver unit fitted in the boiler .................. 12
5.2 Connecting the radio receiver unit installed in
the living room ..................................................... 13
6 Start-up ............................................................... 14
7 Operating............................................................ 15
8 Operating and display functions...................... 15
8.1 Service information.............................................. 15
8.2 System configuration: System ............................. 16
8.3 Heat generator system configuration................... 17
8.4 Heating circuit system configuration.................... 17
8.5 System configuration: Domestic hot water
circuit ................................................................... 18
8.6 Radio link system configuration........................... 18
8.7 Changing the code for Installer level ................... 19
9 Replacing components ..................................... 19
9.1 Change batteries ................................................. 19
9.2 Recording radio controller settings ...................... 20
9.3 Replacing the radio receiver unit ......................... 20
9.4 Replacing the radio control.................................. 20
10 Decommissioning.............................................. 21
10.1 Removing the radio receiver unit......................... 21
10.2 Removing the radio control.................................. 22
11 Recycling and disposal..................................... 22
12 Customer service............................................... 23
Appendix ............................................................................ 24
A Overview of installation assistant set-up
options................................................................ 24
B Installer level overview...................................... 24
C Fault messages.................................................. 27
D Faults .................................................................. 28

0020131978_02 Installation instructions 3
E Technical data.................................................... 29
E.1 Control ................................................................. 29
E.2 Radio receiver unit............................................... 30
Index ................................................................................... 31

4Installation instructions 0020131978_02
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 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
1.2 Intended use
In the event of inappropriate or improper use,
damage to the product and other property
may arise.
The control controls a heating installation with
Vaillant heat generators with eBUS interface
in a way that is room-temperature-controlled
and time-dependent.
The control can control the domestic hot wa-
ter generation from a connected domestic hot
water cylinder.
Intended use includes the following:
–observance of accompanying operating, in-
stallation and maintenance instructions for
the product and any other system compon-
ents
–installing and setting up the product in ac-
cordance with the product and system ap-
proval
–compliance with all inspection and main-
tenance conditions listed in the instruc-
tions.

0020131978_02 Installation instructions 5
Intended use also covers installation in ac-
cordance with the IP code.
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.
1.3 General safety information
1.3.1 Risk caused by inadequate
qualifications
The following work must only be carried out
by competent persons who are sufficiently
qualified to do so:
–Set-up
–Dismantling
–Installation
–Start-up
–Inspection and maintenance
–Repair
–Decommissioning
▶Proceed in accordance with current tech-
nology.
1.3.2 Risk of death from live connections
When working in the electronics box of the
boiler, there is a risk of death from electric
shock. Continuous voltage is present on the
mains connection terminals, even if the main
switch is turned off.
▶Switch the main switch off before working
on the electronics box of the boiler.
▶Disconnect the boiler from the power
mains by disconnecting the mains plug or
by de-energising the boiler via a partition
with a contact opening of at least 3 mm (e.
g. fuses or power switches).
▶Check that the boiler is de-energised.
▶Secure the power supply against being
switched on again.
▶Open the electronics box only when the
boiler is disconnected from the power sup-
ply.

6Installation instructions 0020131978_02
1.3.3 Material damage due to unsuitable
installation room
If you are installing the control in a wet room,
the electronics may be damaged by moisture.
▶The control should only be installed in dry
rooms.
1.3.4 Danger due to malfunctions
▶Ensure that the heating installation is in a
technically perfect condition.
▶Ensure that no safety or monitoring
devices have been removed, bridged or
decommissioned.
▶Immediately rectify any faults and damage
that may affect safety.
▶Install the controller in a location where it is
not covered by furniture, curtains, or other
objects.
▶If the room temperature modulation is ac-
tivated, advise the end user that, in the
room where the control is installed, all the
radiator valves must be fully open.
▶Do not use the unit's free terminals as sup-
ports for other wiring.
▶Route 230 V connection cables and sensor
or bus cables as of a length of 10 m separ-
ately.
1.3.5 Risk of material damage caused by
frost
▶Do not install the product in rooms prone to
frost.
1.3.6 Risk of material damage caused by
using an unsuitable tool
▶Use the correct tool.
1.4 Regulations (directives, laws,
standards)
▶Observe the national regulations, stand-
ards, directives, ordinances and laws.

0020131978_02 Installation instructions 7
2 Notes on the documentation
2.1 Observing other applicable documents
▶Always observe all the operating and installation instruc-
tions included with the system components.
2.2 Storing documents
▶Pass these instructions and all other applicable docu-
ments on to the end user.
2.3 Validity of the instructions
These instructions apply only to:
Product article number
VRT 350f 0020124482
3 Product description
3.1 Identification plate
The identification plate is located on the rear panel of the
controller casing.
The identification plate contains the following information:
Information on the identific-
ation plate
Meaning
Serial number For identification
Information on the identific-
ation plate
Meaning
VRT XXX Unit designation
V Operating voltage
mA Current consumption
CE label Unit complies with European
standards and directives
Waste container Proper disposal of the unit
3.2 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/.

8Installation instructions 0020131978_02
4 Installation
You can either install the radio receiver unit within the boiler
or install it separately on a wall in the living area.
You must fit the radio controller on a wall in the living area.
4.1 Scope of delivery
Quant-
ity
Component
1 Control
1 Radio receiver unit
1 Wall base for radio receiver unit
1 Unit mounting bracket for control
2 Fixing material (2 screws and 2 wall plugs)
1 Battery set (4 x AA)
1 3-pin header
1 Operating instructions
1 Installation instructions
4.2 Fitting the radio receiver unit in the boiler
Note
When fitting the radio receiver unit in the boiler's
electronics box, follow the instructions for fitting
a radio receiver unit that are given in the boiler's
installation instructions.
1. Switch off the boiler.
2. Disconnect the power supply to the boiler.
3. Disconnect the boiler from the power grid by pulling
out the mains plug or removing the power supply to the
boiler using a partition with a contact gap of at least
3 mm.
4. Secure the power supply against being switched back
on.
5. Check that there is no voltage in the boiler.
6. If necessary, open the front panel on the boiler.
7. Remove the control panel fascia from the boiler for the
control module.
8. Carefully lever the radio receiver unit from the wall
base.
9. Alternatives 1:
Condition: Vertical plug-in connections with pins in the electronics box.
▶If required, remove the 3-pin header.
▶Carefully press the radio receiver unit into the plug-in con-
nection in the electronics box.

0020131978_02 Installation instructions 9
9. Alternatives 2:
Condition: Horizontal plug-in connections with no pins on the electronics box
1
2
1 Control PCB 2 3-pin header
▶Connect the 3-pin header supplied to the control with the
short ends in the three horizontal openings on the radio
receiver unit PCB.
▶Carefully press the radio receiver unit with the pin header
into the plug-in connection in the electronics box.
10. Switch on the power supply to the boiler.
11. Start up the boiler.
12. If necessary, close the front panel of the boiler.
4.3 Fit the radio receiver unit in the living room
1
2
1 Control PCB 2 3-pin header
1. Check that the 3-pin header is connected to the control
PCB.
Result:
The 3-pin header connector is connected to the control
PCB.
▶Remove the 3-pin header connector.

10 Installation instructions 0020131978_02
2. Fit the radio receiver unit on an internal wall of the main
living room in such a way that ensures that there are
no problems with the radio link between the control and
the radio receiver unit.
Note
Wall-mounting the radio receiver unit is only
necessary if its position needs to be optim-
ised after start-up in order to ensure a good
radio link with the control.
3
4
4
7
6
5
3
2
1
3
1 Radio receiver unit
2 Wall-mounting base
3 Mounting holes
4 Openings for cable
ducting
5 Pin header with termin-
als for the eBUS line
6 Wall-mounting base
cover
7 Slot for screwdriver

0020131978_02 Installation instructions 11
3. Insert a screwdriver into the slot (7) on the wall base
(2).
4. Carefully lever the radio receiver unit (1) from the wall
base (2).
5. Mark a suitable position on the wall. Take the eBUS
line cable laying into account when doing so.
6. Drill two holes in line with the mounting holes (3).
–Diameter of mounting hole: 6 mm
7. Route the eBUS line through one of the grommets (4).
8. Insert the wall plugs supplied.
9. Use the screws supplied to secure the wall base.
10. Connect the eBUS line to the terminal block.
(→Page 13)
11. Carefully insert the radio receiver unit in the wall base.
Ensure that the pin header connector (5) on the wall
base fits into the radio receiver unit plug-in connection
provided.
12. Carefully press the radio receiver unit into the wall base
until the locking tabs on the radio receiver unit are
heard to click into place.
4.4 Fitting the radio control
1. Fit the control on an internal wall of the main living
room in such a way that ensures that there are no prob-
lems with the radio link between the control and the ra-
dio receiver unit.
–Height: ≈1.5 m
1
2
3
1 Unit mounting bracket
2 Mounting openings
3 Finishing panel
2. Remove the unit mounting bracket from the rear of the
control by pulling the bracket downwards.
3. Remove the finishing panel from the unit mounting
bracket by pulling the top edge of the panel away from
the unit mounting bracket with your fingers.
4. Mark a suitable position on the wall.
5. Drill two holes in line with the mounting holes (2).
–Diameter of mounting hole: 6 mm
6. Insert the wall plugs supplied.

12 Installation instructions 0020131978_02
7. Fix the unit mounting bracket (1) to the wall using the
screws supplied.
8. Locate the two bottom lugs of the finishing panel (3) in
the holes in the unit mounting bracket.
9. Press the top edge of the finishing panel into the unit
mounting bracket until it clicks into position.
C
B
A
10. Open the battery compartment on the underside of the
control.
11. Remove the two plastic strips between the batteries
and the contacts.
12. Check that the battery poles are the right way round.
13. Close the battery compartment.
14. Hook the control onto the unit mounting bracket.
15. Press the control down onto the unit mounting bracket
until it audibly clicks into position.
16. Check the quality of the radio link.
5 Electrical installation
When connecting the eBUS line, there is no need to pay at-
tention to the polarity. If the two connections are switched
around, communication is not affected.
Note
Only qualified electricians may carry out the elec-
trical installation.
5.1 Radio receiver unit fitted in the boiler
If you fit the radio receiver unit in the boiler, the electrical
connections are made by contact between the controller's pin
header connector and the mating connection on the boiler.
Wiring up the radio receiver unit is only required if you have
mounted it on a wall.

0020131978_02 Installation instructions 13
5.2 Connecting the radio receiver unit installed
in the living room
5.2.1 Connecting the radio receiver unit to the
boiler with a "3-4-5 Terminal"
1. Switch off the boiler.
2. Disconnect the power supply to the boiler.
3. Disconnect the boiler from the power grid by pulling
out the mains plug or removing the power supply to the
boiler using a partition with a contact gap of at least 3
mm.
4. Secure the power supply to the boiler against being
switched back on again.
5. Check that there is no voltage in the boiler.
12
1 Radio receiver unit
terminal block
2 Boiler terminal strip
6. Check whether the bridge is installed between termin-
als 3 and 4 on the PCB of the electronics box and, if re-
quired, install the bridge between terminals 3 and 4.
7. Connect the eBUS line to the terminal block (1) in the
wall base of the radio receiver unit.
8. Connect the eBUS line to the terminal block of the
boiler (2).
5.2.2 Connecting the radio receiver unit to a boiler
with a "24V=RT terminal"
1. Switch off the boiler.
2. Disconnect the power supply to the boiler.
3. Disconnect the boiler from the power grid by pulling
out the mains plug or removing the power supply to the
boiler using a partition with a contact gap of at least 3
mm.
4. Secure the power supply to the boiler against being
switched back on again.
5. Check that there is no voltage in the boiler.

14 Installation instructions 0020131978_02
12
1 Radio receiver unit
terminal block
2 Boiler terminal strip
6. Check whether the bridge is installed between the 24
V=RT terminals on the PCB of the electronics box and,
if required, install the bridge between the 24 V=RT ter-
minals.
7. Connect the eBUS line to the terminal block (1) in the
wall base of the radio receiver unit.
8. Connect the eBUS line to the terminal block of the
boiler (2).
6 Start-up
When you start the controller for the first time after electrical
installation or after replacement, the Installation assistant
starts automatically. You can use this Installation assistant
to make the main settings for the heating installation.
Note
To be able to use the controller to set the temper-
ature for the hot water generation and heating cir-
cuit, you must set the maximum value for the tem-
peratures on the boiler.
You can use this Installation assistant to make the main set-
tings for the heating installation.
The operating concept, an operation example, and the menu
structure are all contained in the operating manual for the
controller.
All settings that you have made using the Installation assist-
ant can be changed again at a later time via the operating
level for the system operator Installer level. The read-off and
setting options at installer level are described in the access
level for the competent person (→Page 24).

0020131978_02 Installation instructions 15
7 Operating
The controller has two operating levels, the access level for
the operator and the access levels for the competent person.
The setting and read-out options for the operator, the oper-
ating concept and an operating example are described in the
operating instructions for the controller.
8 Operating and display functions
The path details given at the start of each function descrip-
tion indicate how you can access this function in the menu
structure.
The square brackets contain the level of detail to which the
function belongs.
You can use the left-hand selection button Menu and the list
entry Installer level to set the operating and display func-
tions.
8.1 Service information
8.1.1 Enter contact details
Menu →Installer level →Service information →Enter con-
tact details
–You can enter your contact details (company name and
phone number) in the control.
–As soon as the date of the next service appointment is
reached, the end user can view these contact details in
the display of the control.
8.1.2 Entering the service date
Menu →Installer level →Service information →Service
date
–In the controller, you can save a date (day, month, year)
for the next regular service.
When the date for the next service date is reached, the mes-
sage Service heater 1 is displayed in the basic display of the
controller.
If a service date is saved in the heater, the message Service
heater 1 appears on the heater when this date is reached.
The message is switched off if:
–the date is in the future.
–the initial date 01.01.2011 is set.
Note
To find out which service date to enter, refer to the
instructions for your heater unit.

16 Installation instructions 0020131978_02
8.2 System configuration: System
8.2.1 Reading the system status
Menu →Installer level →System configuration [System ---
-] →Status
–This function allows you to read the status of the heating
installation. If there is no fault, the message "OK" appears
here. If there is a fault, the status "Not OK" is displayed. If
you press the right-hand selection button, the list of Fault
messages (→Page 27) is displayed.
8.2.2 Reading the water pressure of the heating
installation
Menu →Installer level →System configuration [System ---
-] →Water pressure
–You can use this function to read the water pressure of
the heating installation.
8.2.3 Reading the domestic hot water generation
status
Menu →Installer level →System configuration [System ---
-] →Domestic hot water
–You can use this function to read the domestic hot water
generation status (Charged,Not charged).
8.2.4 Reading the software version
Menu →Installer level →System configuration [System ---
-] →Control modules
–You can use this function to read the software version
of the display, the heat generator and the radio receiver
unit.
8.2.5 Setting the control type
Menu →Installer level →System configuration [System ---
-] →Control type
–Select this function to set the type of room temperature
control:
–Two-point corresponds to an On/Off control system
–Analogue corresponds to a modulating control system
8.2.6 Setting the distance adjustment
Menu →Installer level →System configuration [System ---
-] →Distance adjustment
–This function allows you to optimally adjust the switching
behaviour of the controller to the room size or the radiator
layout:
–Positive values: slower controller switching behaviour
–Negative values: faster controller switching behaviour
The Distance adjustment function is only available if you
have set Analogue under the Control strategy function

0020131978_02 Installation instructions 17
8.3 Heat generator system configuration
8.3.1 Reading the status of the heater
Menu →Installer level →System configuration [Heater 1 --
--] →Status
–This function allows you to read the current status of the
heater (boiler). Off,Heating (heating mode), hot water
generation.
8.3.2 Reading the value for the VF1 temperature
sensor
Menu →Installer level →System configuration [Heater 1 --
--] →VF1
–You can use this function to read the current value for the
VF1 temperature sensor.
8.4 Heating circuit system configuration
8.4.1 Reading the end of the current time period
Menu →Installer level →System configuration [HEATING
1----] →Auto day temp until
–You can use this function to stipulate whether or not a
set time period is active for the Automatic mode and
how much of the period is still remaining. To do this, the
control must be in "Automatic mode". The information is
specified in hr:min.
8.4.2 Setting the day temperature
Menu →Installer level →System configuration [HEATING
1----] →Day temperature
–You can use this function to set the desired day temperat-
ure for the heating circuit.
8.4.3 Setting the set-back temperature
Menu →Installer level →System configuration [HEATING
1----] →Set-back temperature
–You can use this function to set the desired set-back tem-
perature for the heating circuit.
The set-back temperature is the temperature to which the
heating is to be reduced at times of low heat demand (e.g.
overnight).
8.4.4 Reading the target flow temperature
Menu →Installer level →System configuration [HEATING
1----] →Flow temp. target
–You can use this function to read the target flow temper-
ature for the heating circuit.
8.4.5 Reading the actual flow temperature
Menu →Installer level →System configuration [HEATING
1----] →Flow temp. current
–You can use this function to read the actual flow temper-
ature for the heating circuit.

18 Installation instructions 0020131978_02
8.4.6 Reading the status of special operating
modes
Menu →Installer level →System configuration [HEATING
1----] →Advanced functions
–You can use this function to define whether a special
operating mode (special function), such as Party etc. is
currently active for a heating circuit.
8.5 System configuration: Domestic hot water
circuit
8.5.1 Activating the cylinder
Menu →Installer level →System configuration [Domestic
hot water ----] →Cylinder
–Select this function to specify whether a cylinder is con-
nected:
Active: Cylinder connected
Inactive: No cylinder connected
8.5.2 Setting the target temperature for domestic
hot water cylinder (desired domestic hot
water temperature)
Menu →Installer level →System configuration [Domestic
hot water ----] →Cylinder temp. target
–You can use this function to define the target temperature
for a connected domestic hot water cylinder (desired do-
mestic hot water temperature). Set the target temperat-
ure on the control in such a way that the heat demand of
the end user is covered.
The temperature for the domestic hot water cylinder must be
set to the maximum value in the boiler.
8.5.3 Reading the actual temperature of the
domestic hot water cylinder
Menu →Installer level →System configuration [Domestic
hot water ----] →Cyl. temp. current
–You can use this function to read the measured cylinder
temperature.
8.6 Radio link system configuration
8.6.1 Checking radio communication between
controller and radio receiver unit
Menu →Installer level →System configuration [RF con-
nection ----] →Controller
–The quality of the RF connection is indicated by a number
on a scale of 0 to 10.
0: No reception
1: Poor quality
10: Excellent quality
The display of the quality is updated if there is a change.
You should change the location of the controller or radio re-
ceiver unit if the quality rating is below 3. The range of radio
transmission inside buildings greatly depends on the local

0020131978_02 Installation instructions 19
conditions (e.g. design and structure of the building). Con-
sequently, an indoor range of 25 m cannot always be guar-
anteed. Outside of enclosed spaces (outdoors), the range is
more than 100 m.
8.6.2 Commissioning a replacement radio
controller (teach-in)
Menu →Installer level →System configuration [RF con-
nection ----] →Teach-in
–You can use this function to start up the new controller
after you have replaced a defective controller.
8.7 Changing the code for Installer level
Menu →Installer level →Change code
–This function allows you to change the access code for
the "Installer level" operating level.
If the code is no longer available, you must reset the control
to the factory setting in order to obtain access to Installer
level again.
9 Replacing components
9.1 Change batteries
Danger!
Risk of death caused by unsuitable batter-
ies!
If batteries –whether rechargeable or non-
rechargeable –are replaced with the wrong
type of battery, there is a risk of explosion.
▶Ensure that you use the correct battery
type when replacing batteries.
▶Dispose of used batteries in accordance
with the instructions in this manual.
1. Pull the radio control upwards and off the unit mounting
bracket.
2. Remove the batteries.
3. Dispose of the batteries appropriately.
4. Insert four new batteries of the same type in the control.
5. Only use new AA/LR6 1.5 V alkaline batteries.
6. Check that the battery poles are the right way round.
7. Hook the control onto the unit mounting bracket.
8. Press the control down onto the unit mounting bracket
until it audibly clicks into position.

20 Installation instructions 0020131978_02
9.2 Recording radio controller settings
1. Before replacing the radio receiver unit and/or the radio
controller, make a note of all the settings on the radio
controller.
2. Scroll through all display pages on the radio controller
and note down all manually configurable values (e.g.
target room temperature, programmed time period).
Note
When you replace the radio receiver unit
and/or the radio controller, the user-specific
settings will be partially or completely lost.
9.3 Replacing the radio receiver unit
▶Before you start, make a note of all the settings on the
radio control.
9.3.1 Removing from the wall
1. Insert a screwdriver into the slot on the wall base.
2. Carefully lever the radio receiver unit from the wall
base.
3. Dispose of the faulty radio receiver unit correctly.
9.3.2 Removing from the boiler
1. If necessary, open the front panel on the boiler.
2. Carefully remove the radio receiver unit from the boiler
electronics box.
3. If necessary, close the front panel on the boiler.
4. Dispose of the faulty radio receiver unit correctly.
9.3.3 Fitting the radio receiver unit
1. Mount the radio receiver unit on the wall. (→Page 9)
2. Fit the radio receiver unit in the boiler. (→Page 8)
9.4 Replacing the radio control
9.4.1 Removing from the wall
1. Pull the radio control upwards and off the unit mounting
bracket.
2. Remove the batteries.
3. Dispose of the batteries and the radio control correctly.
9.4.2 Fitting the radio control
1. Insert four new batteries of the same type in the control.
2. Use only new batteries of the type Alkaline AA/LR6
battery 1.5 V.
3. Check that the battery poles are the right way round.
4. Hook the control onto the unit mounting bracket.
5. Press the control down onto the unit mounting bracket
until it audibly clicks into position.
9.4.3 Radio receiver unit: Activating pairing
1. Press the pair button to restart the pairing process.
◁The green LED will start flashing.
2. Activate pairing for the radio control. (→Page 21)