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.