Vaillant VRT 350 User manual

For the operator
Operating instructions
VRT 350
VRT 350
GB, IE
Operating instructions

Legal information
Document type: Operating instructions
Product: VRT 350
Target group: Operator
Language: EN
Document number_version: 0020135485_01
Created on: 24.05.2012
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
0020135485_01 VRT 350 Operating instructions 3
Contents
1 Notes on the documentation .............................. 4
1.1 Symbols and signs used........................................ 4
1.2 Observing other applicable documents ................. 4
1.3 Document storage ................................................. 4
1.4 Applicability of the instructions .............................. 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................................. 8
3.1 Unit design............................................................. 8
3.2 Identification plate.................................................. 8
3.3 Serial number ........................................................ 8
3.4 Control function...................................................... 8
3.5 Frost protection function ........................................ 9
4 Operating.............................................................. 9
4.1 Operating structure................................................ 9
4.2 Operating concept ............................................... 12
4.3 Overview of setting and read-out options ............ 16
5 Operating and display functions...................... 21
5.1 Information........................................................... 21
5.2 Settings................................................................ 22
5.3 Operating modes ................................................. 28
5.4 Special operating modes ..................................... 30
5.5 Messages ............................................................ 31
6 Service and troubleshooting ............................ 32
6.1 Cleaning the controller......................................... 32
6.2 Detecting and rectifying faults ............................. 32
7 Decommissioning.............................................. 33
7.1 Replacing the controller....................................... 33
7.2 Recycling and disposal........................................ 33
8 Warranty and customer service ....................... 33
8.1 Warranty .............................................................. 33
8.2 Customer service................................................. 33
9 Technical data.................................................... 34
9.1 Controller ............................................................. 34

1 Notes on the documentation
4Operating instructions VRT 350 0020135485_01
1 Notes on the documentation
1.1 Symbols and signs used
Symbols
The following symbols may appear:
Warning symbol (→Page 5)
Information symbol

Symbol for a required action.
Symbol for the result of an action.
1.2 Observing other applicable documents
▶You must observe all instructions for use that are en-
closed with other components of your system.
1.3 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.
1.4 Applicability of the instructions
These instructions apply for the following only:
Article number
Great Britain 0020124475

Safety 2
0020135485_01 VRT 350 Operating instructions 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 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

2 Safety
6Operating instructions VRT 350 0020135485_01
children and elderly persons are particularly at risk, even at
lower temperatures.
▶Select a moderate target temperature.
2.3.3 Danger caused by a malfunction
▶Ensure that air can circulate freely around the controller,
and that the controller is not covered by furniture, curtains
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.
2.3.4 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.
2.3.5 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.
2.4 CE label
The CE label documents that the controller com-
plies with the fundamental requirements of the relevant dir-
ectives.
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 installation with a Vaillant
heater with eBUS interface in a way that is room-controlled
and time-dependent.

Safety 2
0020135485_01 VRT 350 Operating instructions 7
The controller can control the hot water generation of a con-
nected domestic hot water cylinder.
Improper use
Any other use, or use beyond that specified, shall be con-
sidered improper use. Any direct commercial or industrial use
is also deemed to be improper. The manufacturer/supplier is
not liable for any resulting damage. The user alone bears the
risk.
Improper use of any kind 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.

3 Overview of the equipment
8Operating instructions VRT 350 0020135485_01
3 Overview of the equipment
3.1 Unit design
1
3
5
4
6
2
1 Display
2 Wall base
3 Diagnosis socket
4 Right selector button
5 Rotary knob
6 Left selector 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 system and hot
water generation of a connected domestic hot water cylinder.
3.4.1 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 the desired temperature for different times
of the day and for different days of the week. The temperat-
ure sensor measures the room temperature and sends the
values to the controller. At lower room temperatures, the con-
troller switches the heater on. Once the room temperature
reaches the desired set temperature, the controller switches
the heater off. The controller therefore reacts to the fluctu-
ations of the room temperature and constantly controls the
room temperature to the temperature that you have set.
Data exchange and power supply on the controller are via
an eBUS interface. The controller can be equipped with the

Operating 4
0020135485_01 VRT 350 Operating instructions 9
Vaillant diagnosis software and the Vaillant Internet commu-
nication system for remote diagnosis and remote settings.
3.4.2 Hot water generation
You can use the controller to set the temperature and time
for the hot water generation. The heater heats the water in
the domestic hot water cylinder until it reaches the set tem-
perature. You can set a time period during which hot water
should be available in the domestic hot water cylinder.
3.4.3 VR 66 Control Centre
If a VR 66 Control Centre is connected, you can control two
independent heating circuits with just one VRT 350 control-
ler; e.g. one heating circuit is in the single-occupancy house
and the second heating circuit is in a guest apartment in
this building. In this case, one controller is always the main
controller (Zone 1) and the other controller is the auxiliary
controller (Zone 2). For Zone 1, which is controlled via the
main controller, all of the functions are available to you. For
Zone 2, you can use the auxiliary controller to set the desired
temperature for different times of the day and different days
of the week.
3.5 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.
4 Operating
4.1 Operating structure
4.1.1 Access level for the operator
Through the access level for the operator, you access import-
ant information and set-up options which do not require any
special prior knowledge. Via a menu structure, you can ac-
cess 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 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 Operating
10 Operating instructions VRT 350 0020135485_01
4.1.4 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 temperature
3 Time
4 Current function of the
right-hand selector button
(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 basic display is the permanently visible display on the
screen. The basic display shows the current settings and
values of the heating installation. If you make a setting on the
controller, the display on the screen switches from the basic
display to the display for 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.
4.1.4.1 Symbols for the heating mode in the Auto
operating mode
Symbol Meaning
Heating mode within a set time period (comfort
mode)
Heating mode outside a set time period (set-back
mode)
4.1.4.2 Soft key function
Both selector buttons have a soft key function. The current
functions of the selector 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 function of the left-hand selection button may
differ.
–the current function of the right-hand selector button may
differ.
If, for example, you press the left function key, the current
function of the left function key switches from Menu to Back.

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0020135485_01 VRT 350 Operating instructions 11
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 Mode
If you press the right-hand selector button, Operating mode,
you access the settings under Operating mode directly from
the basic display. This is a quick way to modify the of HEAT-
ING 1.
4.1.4.5 Desired temperature
Depending on the operating mode, the desired temperature
may be greyed out on the basic display. This is the case, for
example, in Summer mode. As heating is not operational in
Summer mode, and therefore the heating circuit is off, there
is no desired temperature.
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-hand se-
lection buttons (soft key
functions)
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 Operating
12 Operating instructions VRT 350 0020135485_01
4.1.6 Setting level
HEATING 1
Day
Night set-back
Back Change
20,0°C
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-hand se-
lection buttons (soft key
functions)
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 (→Page 8).
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 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.
Desired day temperature
Only today: 18°C
For permanent change
Press OK
OK
In the display, a request appears asking if you wish to
change the Desired day temperature for only 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.

Operating 4
0020135485_01 VRT 350 Operating instructions 13
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 01.07.11
°C
19,5
15:34
Desired temperature 20,0°C
Menu 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
Time programmes
Time programmes
Days away scheduling
Basic settings
Back
Select
4. Press the right-hand selection button, Select.
◁The controller is now in selection level 2.

4 Operating
14 Operating instructions VRT 350 0020135485_01
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).
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.

Operating 4
0020135485_01 VRT 350 Operating instructions 15
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 Operating
16 Operating instructions VRT 350 0020135485_01
4.3 Overview of setting and read-out options
4.3.1 Overview of operating modes
The activated operating mode is shown in the top left of the basic display.
The right-hand selector button can be used to navigate from the basic display directly to the settings under Operating mode.
If you have activated an advanced function, the display indicates the advanced function.
If there is a second heating circuit, you can only set the operating modes using the main controller. The operating mode that
is set applies for Zone 1 and for Zone 2.
Mode Setting Factory reset Setting
Current mode
Auto Automatic mode Active
Summer Summer mode Not active
Day Comfort mode Not active
Night set-back Set-back mode Not active
System OFF (Frost protection) System OFF (Frost protection active) Not active
Advanced function
Cylinder boost Active, Not active Not active
Party function Active, Not active Not active
1 day away from home Active, Not active Not active

Operating 4
0020135485_01 VRT 350 Operating instructions 17
4.3.2 Overview of operating levels
Setting level Values Unit Increment/Select Factory reset Setting
Min. Max.
Information →System status →
System
Status Current value
Water pressure Current value bar
Domestic hot water Current value Charged, Charging
Heating 1
Day temperature Current value ℃0.5 20
5 30
Set-back temperature Current value ℃0.5 15
5 30
Auto day temp to Current value hr:min
away from Current value dd.mm.yy
away to Current value dd.mm.yy
Information →Contact details →
Installer phone number Current values
Information →Serial number →
If the VR 66 is connected, the functions shown in italics are only available for Zone 1 and these are only shown in the display for the
main controller.

4 Operating
18 Operating instructions VRT 350 0020135485_01
Setting level Values Unit Increment/Select Factory reset Setting
Min. Max.
Appliance number Permanent value
Desired temperatures →HEATING 1 →
Day
Night set-back
5 30 ℃0.5 20
15
Desired temperatures →Domestic hot water →
Domestic hot water 35 70 ℃1 60
Time programmes →HEATING 1 →
Individual days and blocks Mo, Tu, We, Th, Fr, Sa,
Su and Mo - Fr, Sa -
Su, Mo - Su
Mo - Fr: 06:00-
22:00
Sa: 07:30-23:30
Su: 07:30-22:00
Time period 1: Start - End
Time period 2: Start - End
Time period 3: Start - End
00:00 24:00 hr:min 10 min
Time programmes →Domestic hot water →
Individual days and blocks Mo, Tu, We, Th, Fr, Sa,
Su and Mo - Fr, Sa -
Su, Mo - Su
Mo to Fr: 05:30-
22:00
Sa: 07:00-23:30
Su: 07.00-22.00
If the VR 66 is connected, the functions shown in italics are only available for Zone 1 and these are only shown in the display for the
main controller.

Operating 4
0020135485_01 VRT 350 Operating instructions 19
Setting level Values Unit Increment/Select Factory reset Setting
Min. Max.
Time period 1: Start - End
Time period 2: Start - End
Time period 3: Start - End
00:00 24:00 hr:min 10 min Mo to Fr: 05:30-
22:00
Sa: 07:00-23:30
Su: 07.00-22.00
Days away scheduling →
Start 01.01.00 31.12.99 dd.mm.yy Day.Month.Year 01.01.10
End 01.01.00 31.12.99 dd.mm.yy Day.Month.Year 01.01.10
Temperature Frost
protection
or 5
30 ℃0.5 Frost protection
Basic settings →Language →
Selectable language English
Basic settings →Date/Time →
Date 01.01.00 31.12.99 dd.mm.yy Day.Month.Year 01.01.10
Time 00:00 24:00 hr:min 10 min 00:00
Daylight saving Off, Auto Off
Basic settings →Display →
If the VR 66 is connected, the functions shown in italics are only available for Zone 1 and these are only shown in the display for the
main controller.

4 Operating
20 Operating instructions VRT 350 0020135485_01
Setting level Values Unit Increment/Select Factory reset Setting
Min. Max.
Display contrast 01 15 1 8
Basic settings →Offset →
Room temperature -3.0 3.0 K0.5 0.0
Basic settings →Set heating circuit name →
Heating 1 1 10 Let-
ter/number
A to Z, 0 to 9, space Heating 1
Basic settings →Factory reset (reset) →
Time programmes Yes, No No
Everything Yes, No No
Installer level →
000 999 1 000
If the VR 66 is connected, the functions shown in italics are only available for Zone 1 and these are only shown in the display for the
main controller.