Vaillant VRC 470, VRC 470f Operating Instructions Manual

Operating instructions

For the operator

GB, IE

Operating instructions

VRC 470f

Weather compensator with radio data transmis­sion

Table of contents

Table of contents

1 Notes on the operating instructions ..................3

1.1 Observe other applicable documents ....................3

1.2 Document storage ......................................................3

1.3 Symbols used ...............................................................3

1.4 Identification plate .....................................................3

1.5 Applicability of the instructions ..............................3

1.6 CE label ......................................................................... 3

1.7 Glossary......................................................................... 3

2 Safety ............................................................................4

2.1 Safety and warning information .............................4

2.1.1 Classification of warnings ......................................... 4

2.1.2 Structure of warnings ................................................4

2.2 Intended use ................................................................4

2.3 Basic safety instructions ...........................................4

3 Description of the unit ............................................6

3.1 Unit design ...................................................................6

3.2 Operation ......................................................................6

3.3 Operating levels ..........................................................7

3.3.1 Menu structure design .............................................. 7

3.3.2 Basic display ................................................................7

3.3.3 Selection levels............................................................8

3.3.4 Setting level .................................................................8

4 Operation .....................................................................9

4.1 Operating concept ......................................................9

4.1.1 Operation in the basic display .................................9

4.1.2 Operation via function keys ................................... 10

4.2 Overview of menu structure .................................... 11

4.3 Overview of setting and read-out options ...........14

4.3.1 Overview of modes ....................................................14

4.3.2 Overview of operating levels ..................................15

5.3 Advanced functions ..................................................28

5.3.1 Cylinder boost............................................................28

5.3.2 Party function ............................................................28

5.3.3 1 Day away from home ............................................29

5.3.4 1 day at home .............................................................29

5.3.5 Ventilation boost .......................................................29

6 Service and troubleshooting .............................. 30

6.1 Service ........................................................................ 30

6.2 Cleaning the controller ........................................... 30

6.3 Detecting and rectifying malfunctions ............... 30

7 Energy saving tips ...................................................31

8 Warranty and customer service.........................32

8.1 Vaillant warranty .......................................................32

8.2 Vaillant Service ..........................................................32

9 Decommissioning ....................................................33

9.1 Replacing the controller ..........................................33

9.2 Recycling and disposal ............................................33

10 Technical data ..........................................................34

11 Glossary .....................................................................35

Index ............................................................................ 37

5 Functional description ............................................19

5.1 Functions ......................................................................19

5.1.1 Reading information .................................................19

5.1.2 Setting desired temperatures ............................... 20

5.1.3 Setting timer programmes ......................................21

5.1.4 Days away from home scheduling ........................23

5.1.5 Days at home scheduling ........................................23

5.1.6 Language selection ..................................................23

5.1.7 Setting the time ........................................................23

5.1.8 Setting the date .......................................................23

5.1.9 Changing over to daylight-saving time ...............24

5.1.10 Setting the display contrast ...................................24

5.1.11 Setting the offset room temperature ..................24

5.1.12 Setting the offset outside temperature ..............24

5.1.13 Changing heating circuit naming ..........................24

5.1.14 Restoring the factory settings ...............................24

5.1.15 Installer level ..............................................................25

5.2 Modes ..........................................................................25

5.2.1 Modes for the heating circuit ................................25

5.2.2 Modes for hot water production and

circulation ...................................................................26

2

Operating instructions VRC 470 0020116689_00

Notes on the operating instructions

1

1 Notes on the operating instructions

These operating instructions are intended for the opera­tor of the heating system. No particular prior knowledge
is required.

1.1 Observe other applicable documents

When operating the VRC470 controller, always take note
of all operating instructions that accompany the other
components in the heating system.

1.2 Document storage

Store these operating instructions and all other applica­ble documents in such a way that

– they are available whenever required,
– they are kept for the full service life of the unit,
– they are available to all subsequent operators.

1.3 Symbols used

The symbols used in the text are explained below:

Useful instructions and information

1.5 Applicability of the instructions

These operating instructions apply to units with the fol­lowing article numbers only :

Type designation Article number Country

VRC 470 0020108130 GB

Tab. 1.1 Type overview

The 10-digit article number can be found in the serial
number of the unit. The article number is found in the
second line of the serial number. You can view the serial
number under "Menu ¬ Information ¬ Serial number"
(¬Fig. 4.10).

1.6 CE label

The CE label documents compliance of the
VRC470 controller with the fundamental
requirements of the relevant directives.

i

> Required actions

1.4 Identification plate

The identification plate is located inside the controller
and is not accessible from the outside.

1.7 Glossary

Technical terms are explained in the glossary
(¬Section11) at the end of these instructions.

Operating instructions VRC 470 0020116689_00

3

2

Safety

2 Safety

2.1 Safety and warning information

> When operating the VRC 470 controller, take account

of the general safety instructions and the warning
notes that appear before all of the actions.

2.1.1 Classification of warnings

The warning notes are classified in accordance with the
severity of the possible danger using the following dan­ger signs and signal words:

Danger sign Signal word Explanation

Immediate danger to life

Danger!

a

Danger!

or danger of severe
personal injury

Risk of death from elec­tric shock

e

Risk of minor personal

Warning!

injury

a

Risk of material or envi-

Caution!

ronmental damage

b

2.1.2 Structure of warnings

Warning signs are identified by an upper and lower sepa­rating line and are laid out according to the following
basic principle:

2.2 Intended use

The VRC 470 controller is a state-of-the-art appliance
manufactured in accordance with recognised safety
regulations.
Even so, in the event of inappropriate or non-intended
use, damage to the unit and other property may occur.

The VRC 470 controller controls a Vaillant heating sys­tem in a weather-compensated and time-dependent
manner. The controller is connected to a Vaillant boiler.
The controller can also regulate the hot water produc­tion of a connected domestic hot water cylinder with or
without circulation.

Any other or additional use is considered to be improper.
The manufacturer/supplier is not liable for any resulting
damage. The owner alone bears any risk.

Observe the operating instructions

Intended use also includes compliance with the operat­ing manual and all other applicable documents.

2.3 Basic safety instructions

Installation of the device can be only carried out by a
heating engineer. This heating engineer is also responsi­ble for proper installation and start-up.

Protecting from Legionella
The controller is furnished with an anti-Legionella func-

tion to protect against infection by germs (Legionella).
When the anti-Legionella function is activated, the water
in the domestic hot water cylinder is heated to over
60 °C for at least an hour. The heating engineer acti­vates the anti-Legionella function on installation of the
controller.

> Ask the heating engineer if he has activated the anti-

Legionella function.

> Ask the heating engineer to explain how the anti-

Legionella function works.

Signal word!

Type and source of danger!

a

4

Explanation of the type and source of danger

> Measures for averting the danger

Operating instructions VRC 470 0020116689_00

Preventing the risk of scalding

There is a danger of scalding at the hot water draw-off
points when the target temperatures are in excess of
60 °C. Young children and elderly persons can even be
at danger at lower temperatures.

> Select a moderate target temperature.
> If the anti-Legionella function is activated, discuss the

following with the heating engineer:

– when does the anti-Legionella function start,
– when will the hot water cool back down to the tar-

get temperature,

– is a mixing valve incorporated in the heating sys-

tem as protection against scalding,

– what do you have to do to avoid scalding.

Preventing a malfunction

> Only operate the heating installation when it is in a

technically perfect condition.

> Ensure that any faults and damage that may nega-

tively affect safety are rectified immediately.

Preventing frost damage

If there is a power cut, or if the room temperature is set
too low in individual rooms, sections of the heating sys­tem might be damaged by frost.

> If you are absent during a frosty spell, ensure that the

heating system remains in operation and the rooms
are warmed adequately.

> Observe the frost protection instructions

(¬Section3.2).

Safety

2

Operating instructions VRC 470 0020116689_00

5

Description of the unit

3

3 Description of the unit

3.1 Unit design

1

5

4

3

Fig. 3.1 Front view of VRC 470

1 Display
2 Diagnostic socket for the heating engineer
3 Right function key
4 Control knob (without pushbutton function)
5 Left function key

3.2 Operation

The VRC 470 controller controls the Vaillant heating sys­tem and hot water production of a connected domestic
hot water cylinder.
If the controller is mounted in a living room, you can
operate the heating system and hot water production
from that room. If the controller is mounted on the
boiler, you can operate the heating system and hot water
production from the boiler.

2

The temperature sensor measures the outside tempera­ture and sends the values to the controller. When the
outside temperature is low, the controller increases the
flow temperature of the Vaillant heating system. 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 tem­perature, keeps the room temperature constantly at the
set desired temperature.

The frost protection function protects the heating sys­tem and dwelling against frost damage.
The frost protection function monitors the outside tem­perature. If the outside temperature:

– falls below 3 °C, the controller switches the boiler on

after a frost protection delay time, and brings the
room temperature to 5 °C.

– rises above 4 °C, the controller does not switch the

boiler on but monitors the outside temperature.

The heating engineer will set the frost protec-

tion delay time at the time of installation.

i

Hot water production

With the VRC 470 controller, you can also set the tem­perature and time for hot water production. The boiler
heats the water in the domestic hot water cylinder to
the set temperature. You can set a period during which
hot water should be available in the domestic hot water
cylinder.
If a circulation pump is installed in the heating system,
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.
Hot water production is not affected by the weather
compensated control of the heating system.

Several heating circuits

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 2" in a granny annexe in this house.

– two heating circuits interdependent on each other in

a dwelling, e.g. "HEATING 1" for radiators and "HEAT­ING 2" for underfloor heating.

Heating installation

You can use the controller to set the desired tempera­tures for different times of the day and for different
days of the week.
The VRC 470 controller is a weather-compensated con­troller with a temperature sensor mounted in the open
air.

6

Operating instructions VRC 470 0020116689_00

Description of the unit

3

3.3 Operating levels

The controller has two superordinate operating levels.

Operating level for the heating engineer

The operating level for the heating engineer must only
be operated with expertise and is therefore protected by
a code. This level is used by the heating engineer to
adjust the controller to the heating system.

Operating level for the operator

The operating level for the operator shows you impor­tant information and offers set-up options which do not
require any special prior knowledge. Via a menu struc­ture, you can access configurable or read-only values.

3.3.1 Menu structure design

A

1234

3

4

3.3.2 Basic display

The basic display is the permanently visible display on
the screen. The basic display shows the current settings
and values of the heating system. If you make a setting
on the controller, the display on the screen switches
from the basic display to the display for new settings.
The basic display appears when you:

– press the left function key and thus exit selection

level 1.

– do not operate the controller for more than 5 min-

utes.

If your heating system has two independent

heating circuits, the heating engineer will

i

8

7

determine during installation whether or not
the basic display shows the values of circuit1
or circuit2.

Auto 01.01.10

10:02

°C

19,5

1

2

3

Desired temperature 20,0°C

6

Menu

Mode

21

1

Fig. 3.2 Menu structure

A Basic display
1 Selection level 1
2 Selection level 2
3 Selection level 3

4 Setting level

The menu structure of the controller is split into four
levels. From the basic display, you can access selection
level 1. Through up to three selection levels, you can
access one level lower or higher in the menu structure.
The setting level is accessed from the lowest selection
level.

4

4

5

Fig. 3.3 Basic display

1 Date
2 Current room temperature
3 Time
4 Current function of the right function key

(Soft key function)

5 Current function of the left function key

(Soft key function)
6 Desired temperature (target room temperature)
7 Symbol for heating mode in "AUTO" mode
8 Mode set for the heating mode

Heating mode symbols

Sun = Heating mode within a set period (Comfort

mode)

Moon = Heating mode outside a set period (Night

mode)

4

Operating instructions VRC 470 0020116689_00

7

Description of the unit

3

Soft key function

Both function keys have a soft key function.
The current functions of the function keys are displayed
in the lower display line.
Depending on the selection level selected in the menu
structure, the list entry or the value:

– the current function (5) of the left function key may

differ.

– the current function (4) of the right function key may

differ.
If, for example, you press the left function key, the cur­rent function of the left function key switches from
"Menu" (¬Fig. 3.3) to "Back" (¬Fig. 3.4).

Menu

If you press the left function key "Menu", you switch
from the basic display to selection level 1 of the menu
structure.

Mode

If you press the right function key "Mode", you access
the settings under "Mode" directly from the basic dis­play. In this way, you can quickly change the mode of
"HEATING 1" or "HEATING 2" (¬Section4.3.1). Whether
or not you can change a heating circuit depends on the
settings made by the heating engineer during installa­tion.

3.3.3 Selection levels

Through the selection levels, you navigate to the setting
level in which you wish to read or change settings.
The selection levels have four display fields.

4

1

3

Menu
Information

Desired temperatures

Time programmes

Back

2

Fig. 3.4 Display fields in the selection levels

1 Scroll bar (only appears if there are more list entries than

can be shown at once on the display)

2 Current functions of the right and left function keys (soft

key functions)
3 List entries of the selection levels
4 Current function or selection level

Select

Desired temperature

Depending on the mode, the desired temperature (6)
may be greyed out on the 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.

3.3.4 Setting level

In the setting level, you can select the values you wish to
read or change.
The setting level has five display fields.

1

HEATING 1
Day

Night set-back

5

Back

4

Fig. 3.5 Display fields in the setting level

1 Current selection level
2 Values

3 Highlighting (white font on black background) shows the

current selection.
4 Current functions of the right and left function keys (soft

key functions)
5 Setting level

20,0°C

7, 5 °C

Change

2

3

8

Operating instructions VRC 470 0020116689_00

Operation

4

4 Operation

4.1 Operating concept

The controller is operated with two function keys and a
control knob (¬Section3.1).

Use the function keys to:

– navigate through the selection levels and the setting

level in the menu structure (¬Tab. 4.2),

– highlight a setting,
– confirm a value,
– activate a mode,
– cancel changing a value.

Use the control knob to:

– navigate through the list entries of a selection level

by turning the control knob to the left or right
– highlight a selection level or a setting level,
– change a selected value.

The display shows a highlighted selection level, a setting
level or a highlighted value with white font on a black
background.

If you do not operate the controller during a

period of more than 5 minutes, the basic dis-

i

play appears in the display again.

4.1.1 Operation in the basic display

From the basic display, you can change the "Desired day
temperature" directly for the current day by turning the
control knob.

Desired day temperature

Only today: 18°C

For Permanent Change

Press Ok

Ok

Fig. 4.1 Request to change the desired temperature

In the display, a request appears asking if you wish to
change the "Desired day temperature" for the current
day or on a permanent basis.

To change the "Desired day temperature" for the cur­rent day only:

> Turn the control 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 period of the current day.

To change the "Desired day temperature" perma­nently:

> Turn the control knob to set the desired day tempera-

ture.

> Press the right function key "OK".
The display switches to the basic display. The new
desired day temperature is applied permanently.

Operating instructions VRC 470 0020116689_00

9

Operation

4

4.1.2 Operation via function keys

Example: Changing the time

You wish to change the time.
The display shows the basic display.
If the display does not show the basic display, press the
left function key "Back" until the basic display appears
again.

Day 01.01.10

08:15

°C

19,5

Desired temperature 20,0°C

Menu

Fig. 4.2 Basic display

> Press the left function key "Menu".

Menu

Information

Desired temperatures
Time programmes

Mode

Basic settings

Language

Date / Time
Display

Back

Fig. 4.5 Selection level 2: "Language"

The controller is now in selection level 2.

> Turn the control knob until the "Date / Time" list

entry is highlighted.

Select

Basic settings
Language

Date / Time

Display

Back

Fig. 4.6 Selection level 2: "Date / Time"

> Press the right function key "Select".

Select

Back

Fig. 4.3 Selection level 1: "Information"

The controller is now in selection level 1.
The left function key now has the function "Back" (to
the next selection level up), the right function key has
the function "Select" (the next selection level down).

> Turn the control knob until the "Basic settings" list

entry is highlighted.

Select

Menu
Day away from home scheduling

Day at home scheduling

Basic settings

Back

Fig. 4.4 Selection level 1: "Basic settings"

> Press the right function key "Select".

Select

Date / Time
Time

Date
Day-light savings

Back

Fig. 4.7 Setting level: Value for hours highlighted

The controller is now in setting level "Time". The value
for hours is highlighted.
The left function key now has the function "Back" (to
the next selection level up), the right function key has
the function "Change" (of the value).

> Press the right function key "Change".

Change

:1508

01.01.10
Off

Date / Time
Time

Date
Day-light savings

Back

Fig. 4.8 Setting level: Approving the value to be changed

Change

:1508

01.01.10
Off

10

Operating instructions VRC 470 0020116689_00

Operation

4

You can change the value by turning the control knob.
The left function key now has the function "Cancel" (the
change), the right function key has the function "OK" (to
confirm the change).

> Turn the control knob to change the value.
> Press the right function key, "OK", to save the change.

The controller has saved the changed time.

Date / Time
Time

Date
Day-light savings

Back

Fig. 4.9 Setting level: Change saved

> Press the left function key "Back" several times to

switch back to the next selection level up and to
access the basic display from selection level 1.

Change

:1509

01.01.10
Off

4.2 Overview of menu structure

List entry "HEATING 2" is only shown by the

controller if there is a second heating circuit.

i

i

Two consecutive display texts mean that there
can be one display text for "HEATING 1" and
one display text for "HEATING 2".

Greyed out display texts are only shown by

the controller if a corresponding expansion
module is connected. Ask the heating engi­neer which expansion modules are installed.

Operating instructions VRC 470 0020116689_00

11

Operation

4

Auto 01.01.10

19,5

Desired temperature 20,0°C

Menu

Menu

Information

Desired temperatures
Time programmes

Back

Menu
Information

Desired temperatures

Time programmes

Back

°C

Mode

Select

Select

1:02

Information

System status

Solar yield
Contact details

Back

Information
System status

Solar yield

Contact details

Back

Information
Systemstatus
Solar yield

Contact details

Back

Information
Solar yield
Contact details

Serialnummer

Back

Desired temperatures

HEATING 1

HEATING 2

Domestic hot water

Back

Back

Desired temperatures
HEATING 1

HEATING 2

Domestic hot water

Back

Select

Select

Select

Select

Select

Select

Select

2010
2011

312 645 97812

Back

Contact details
Installer
Phone

Back

Serial number

HEATING 1
Day
Night set-back

Domestic hot water
Domestic hot water

Back

Back

Back

Cancel

123456

7890123456

7890123456

00000

10 11

20,0°C

15,0°C

Change

Change

43°C

Ok

0001

kWh

System
Status
Water pressure
Domestic hot water

Back

System
Collector temp
Solar yield
Reset solar yield

Back

HEATING 1

HEATING 1----------------------------------

Day temperature
Night temperature

Back

Back

HEATING 1
Room temperature 17°C
Auto day temp until
away from

Back

Back

HEATING 1
away to 03.04.10
At home from
At home to

Back

Back

Fault

2,3bar

Charged

76° C

4500kWh

20,0°C

7, 5° C

22:10

01.02.10

24.12.1024.12.10

26.12.10

No

Menu
Information
Desired temperatures

Time programmes

Back

Select

Time programmes

HEATING 1

HEATING 2

Domestic hot water

Time programmes
HEATING 1

HEATING 2

Domestic hot water

Fig. 4.10 Overview of menu structure part 1

12

Back

Back

Select

Select

Monday

Period 1:
Period 2:
Period 3:

Back

Back

Domestic hot water

Preparation

Circulation

Back

Domestic hot water
Preparation

Circulation

Back

06 : 00 - 22 : 00

_ _ : _ _ - _ _ : _ _
_ _ : _ _ - _ _ : _ _

Select

Select

Monday

Select

Select

Period 1:
Period 2:
Period 3:

Back

Back

Monday

Period 1:
Period 2:
Period 3:

Back

Back

05 : 30 - 22 : 00
_ _ : _ _ - _ _ : _ _
_ _ : _ _ - _ _ : _ _

Select

Select

06 : 00 - 22 : 00

_ _ : _ _ - _ _ : _ _
_ _ : _ _ - _ _ : _ _

Select

Select

Operating instructions VRC 470 0020116689_00

Operation

4

Menu

Days away from home scheduling

Days at home scheduling
Basic settings

Back

Menu
Days away from home scheduling

Days at home scheduling

Basic settings

Back

Menu
Days away from home scheduling
Days at home scheduling

Basic settings

Back

Select

Select

Select

Days away from home scheduling

HEATING 1

HEATING 2

Back

Days at home schedulingDays at home scheduling

HEATING 1

HEATING 2

Back

Basic settings

Language

Date / Time
Display

Back

Basic settings
Language

Date / Time

Display

Back

Basic settings
Language
Date / Time

Display

Back

Select

Select

Select

Select

Select

Days away from home scheduling
Start
End
Temperature

Back

Back

Days at home schedulingDays at home scheduling
Start
End

Back

Back

Language

Back

Date / Time
Time
Date
Day-light savings

Back

Display
Display contrast
Offset room temp
Offset outside temp.

Back

English

01. 02. 10

03. 04. 10

Change

24. 12. 10

26. 12. 10

Change

10. 03. 04

Change

Change

02. 10

15,0°C

Change

12. 10

Change

OK

01: 0202

0,0K
0,0K

Off

11

Basic settings

Mode

Change heating circuit naming
Factory reset

Back

Basic settings
Mode

Change heating circuit naming

Factory reset

Back

Basic settings
Mode
Change heating circuit naming

Factory reset

Back

Menu Enter code
Basic settings

Installer level

-------------------------------------------------

Back

Select

Back

Fig. 4.11 Overview of the menu structure Part 2

000

Select

Select

Select

Ok

Mode

HEATING 1

HEATING 2

Back

Change heating circuit naming
Heating 1

Heating 2 HEATING2

Back

Factory reset
Time Programmes

Everything

Back

Select

HEATING1HEATING1

Change

No

Select

No

Mode

Automatic mode active

Cylinder boost
Party function

Back

Back

Mode

1 Day away from home

1 day at home
Ventilation boost

Back

Back

Select

Select

Activate

Activate

Operating instructions VRC 470 0020116689_00

13

Operation

4

4.3 Overview of setting and read-out options

The tables below provide overviews of the controller's
modes and the setting and read-out options.

– If the "Increment/Select" column is blank, these are

values that you can read but not adjust.

– If a value cannot be set at the factory, for example

because it is currently being measured, the "Factory
setting" column will be blank.

– If nothing is entered in a "Selection level 3" column,

you will access the setting level directly from selec­tion level 2.

> In the last column, "Own setting", enter that value

that you or the heating engineer have set.

4.3.1 Overview of modes

The right function key can be used to navigate from the
basic display directly to the settings under "Mode".
The currently activated mode is stated in the top left of
the basic display.
If you have activated an advanced function, the display
indicates the advanced function.

Mode Setting Factory setting Own setting

Current mode

Auto
or
Summer
or
Day
or
Set-back
or
System off

Special operating mode

Cylinder boost Active, Not active Not active
Party function Active, Not active Not active
1 day away from home Active, Not active Not active
1 day at home Active, Not active Not active
Ventilation boost Active, Not active Not active

Tab. 4.1 Overview of modes

Automatic mode

Summer mode

Comfort mode

Set-back mode

System off

Auto (automatic mode
active)

14

Operating instructions VRC 470 0020116689_00

4.3.2 Overview of operating levels

Operation

4

Selection
level 1

Selection
level 2

Information System

status

Selection
level 3

Setting level Values Unit Increment/

min. max.

Select

System

Status Current value

–

(¬Section6)

Water pressure Current value bar

Domestic hot
water

Collector temp
Solar yield

Reset solar

1)

yield

Current value – Charged,

Charging

1)

Current value °C

1)

Current value kWh

Current value – Yes, No No

HEATING 1

Da

y tempera-

ture

Night tempera­ture

Room tempera-

3)

tu

re

Auto day temp

Current value °C 0.5 20
530
Current value °C 0.5 15

530

Current value °C

urrent value h:min

C

until
away from Current value dd.mm.

yy

away to Current value dd.mm.

yy

At home from Current value dd.mm.

yy

At home to Current value dd.mm.

yy

HEATING 2

2)

Factory
setting

Own
setting

1)

Tab. 4.2 Ov

Solar yield

erview of operating levels

Operating instructions VRC 470 0020116689_00

Day
temperature

Night tempera­ture

Auto day temp

Current value °C 0.5
530
Current value °C 0.5
530
Current value h:min

until
away from Current value dd.mm.

yy

away to Current value dd.mm.

yy

At home from Current value dd.mm.

yy

At home to Current value dd.mm.

yy

Bar chart Previous year to

current year com-

kWh/
month

parison

15

Operation

4

Selection
level 1

Information Contact

Desired
tempera­tures

Time
programmes

Time
pr

ogrammes

Selection
level 2

details
Serial

number
HEATING 1 Day/

HEATING 2

Domestic
hot w

ater

HEATING 1 Individual days

HEATING 2

Domestic
hot water

Selection
level 3

2)

2)

Preparation Individual days

Circulation Individual days

Setting level Values Unit Increment/

Installer
Phone

Number of the
unit

Night

Day/
Night set-back

Domestic hot
water

and blocks

Period 1:
Start - End
Period 2:
Start - End
Period 3:
Start - End

Individual days
and blocks

Period 1:
Start - End
Period 2:
Start - End
Period 3:
Start - End

and blocks

Period 1:
Start - End
Period 2:
Start - End
Period 3:
Start - End

and blocks

Period 1:
Start - End
Period 2:
Start - End
Period 3:
Start - End

min. max.

Current values

Permanent value

5 30 °C 0.5 °C 20

5 30 °C 0.5 °C 20

35 70 °C 1 °C 60

– – – Mon, Tue,

00:00 24:00 h:min 10 min

–––Mon, Tue,

00:00 24:00 h:min 10 min

– – – Mon, Tue,

00:00 24:00 h:min 10 min

– – – Mon, Tue,

00:00 24:00 h:min 10 min

Select

Wed, Thu, Fri,
Sat, Sun
and
Mon - Fri,
Sat - Sun,
Mon - Sun

Wed, Thu, Fri,
Sat, Sun
and
Mon - Fri,
Sat - Sun,
Mon - Sun

Wed, Thu, Fri,
Sat, Sun
and
Mon - Fri,
Sat - Sun,
Mon - Sun

Wed, Thu, Fri,
Sat, Sun
and
Mon - Fri,
Sat - Sun,
Mon - Sun

Factory
setting

15

15

Mon to Fri:
06:00-22:00
Sat:
07:30-23:30
Sun:
07:30 - 22:00
and
Mon - Fri
06:00-22:00
Sat-Sun
7:30-23:30
Mon-Sun
06:00-22:00

Mon to Fri:
06:00-22:00
Sat:
07:30-23:30
Sun:
07:30 - 22:00
and
Mon - Fri
06:00-22:00
Sat-Sun
7:30-23:30
Mon-Sun
06:00-22:00

Mon to Fri:
05:30-22:00
Sat:
07:00-23:30
Sun:
07:00-22:00
and
Mon - Fri
05:30-22:00
Sat-Sun
07:00-23:30
Mon-Sun
05:30-22:00

Mon to Fri:
06:00-22:00
Sat:
07:30-23:30
Sun:
07:30-22:00
and
Mon - Fri
06:00-22:00
Sat-Sun
7:30-23:30
Mon-Sun
06:00-22:00

Own
setting

Tab. 4.2 Overview of operating levels

16

Operating instructions VRC 470 0020116689_00

Operation

4

Selection
level 1

Days away
from home
scheduling

Days at
home

cheduling

s

Basic

ettings

s

Selection
level 2

HEATING 1 Start 01.01.00 31.12.99 dd.mm.yyDay.Month.

HEATING 2

HEATING 1 Start 01.01.00 31.12.99 dd.mm.yyDay.Month.

HEATING 2

Language – – – – Languages

Date / Time Time 00:00 24:00 h:min 10 min 00:00

Selection
level 3

2)

2)

Setting level Values Unit Increment/

min. max.

End 01.01.00 31.12.99 dd.mm.yyDay.Month.

Temperature Frost

protec­tion
or 5

Start 01.01.00 31.12.99 dd.mm.yyDay.Month.

End 01.01.00 31.12.99 dd.mm.yyDay.Month.

Temperature Frost

protec­tion
or 5

End 01.01.00 31.12.99 dd.mm.yyDay.Month.

Start 01.01.00 31.12.99 dd.mm.yyDay.Month.

End 01.01.00 31.12.99 dd.mm.yyDay.Month.

30 °C 0.5 °C Frost protec-

30 °C 0.5 °C Frost protec-

Select

Ye ar

Ye ar

Ye ar

Ye ar

Ye ar

Ye ar

Ye ar

Ye ar

for selection

Factory
setting

01.01.10

01.01.10

tion

01.01.10

01.01.10

tion

01.01.10

01.01.10

01.01.10

01.01.10

German

Own
setting

Display Display contrast 01 15 – 1 8

Tab. 4.2 Overview of operating levels

Date 01.01.00 31.12.99 dd.mm.yyDay.Month.

Day-light
savings

Offset room
temp.

Offset
outside temp.

-3.0 3.0 K 0.5 0.0

-3.0 3.0 K 0.5 0.0

– Off, Auto off

Ye ar

01.01.00

Operating instructions VRC 470 0020116689_00

17

Operation

4

Selection
level 1

Basic
settings

Installer level Enter code 000 999 – 1 000

Tab. 4.2 Overview of operating levels

1) Is only shown if solar module VR 68/2 is connected.

2) Is only shown if mixer module VR 61/2 is connected.

3) Is only shown if remote control unit VR 81/2 is connected.

4) This value depends on the expansion module connected. If no
expansion module is connected, the upper limit may be limited
by the value for the boiler.

Selection
level 2

2)

Mode

Change

ating cir-

he
cuit naming

Factory

eset

r

Selection
level 3

HEATING 1 Automatic

HEATING 2 Automatic

Setting level Values Unit Increment/

mode or
Summer mode
or
Comfort mode
or
Set-back mode
or
System OFF

Cylinder boost – – – Active, Not

Party function – – – Active, Not

1 Day away
from home

1 day at home – – – Active, Not

Ventilation
boost

mode or
Summer mode
or
Comfort mode
or
Set-back mode
or
System OFF

Cylinder boost – – – Active, Not

Party function – – – Active, Not

1 day away from
home

1 day at home – – – Active, Not

Ventilation
boost

HEATING 1 1 10 Letter/

HEATING

Time pro­grammes

Everything – – – Yes, No No

min. max.

– – – Active, Not

– – – Active, Not

– – – Active, Not

– – – Active, Not

– – – Active, Not

– – – Active, Not

number

2)

110Letter/

– – – Yes, No No

number

Select

active

active

active

active

active

active

active

active

active

active

active

active

A to Z,
0 to 9, space

A to Z,
0 to 9, space

Factory
setting

Automatic
mode active

Not active

Not active

Not active

Not active

Not active

Automatic
mode active

Not active

Not active

Not active

Not active

Not active

HEATING 1

HEATING 2

Own
setting

18

Operating instructions VRC 470 0020116689_00

Functional description

5

5 Functional description

The controller offers various functions, modes and
advanced functions for controlling the heating circuit
and hot water production.

– With the functions, you can read information, and set

desired temperatures, periods and basic settings.

– With the modes, you select whether or not the heat-

ing circuit, hot water production and circulation
should be operated in automatic or manual mode.

– With the advanced functions, you can change the

active mode for the heating circuit and hot water pro­duction in special situations quickly and with time
restrictions.

5.1 Functions

You can set the functions via the left function key
"Menu".
The path details given at the start of each function
description indicate how you reach this function in the
menu structure.
You can read and set heating circuit 1 and, if relevant,
heating circuit 2 independently of one another.

5.1.1 Reading information

"HEATING 2" is only shown under "System

status" if a mixer module VR 61/2 is con-

i

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 function
key has the function "Display". If you press the right
function key "Display", the list of status messages is
shown in the display.

i

Reset solar yield (only with a connected VR68/2)
Menu ¬ Information ¬ System status ¬ Reset solar
yield.

If you select the setting "Yes" under function "Reset
solar yield" and press the right function key "Ok", you
reset the previously totalled solar yield to 0 kWh. After
30 seconds the setting "Yes" automatically returns to
"No".

nected. "HEATING 2" has the same read
options and settings as "HEATING 1".

The "Collector temp", "Solar yield" and

"Reset solar yield" list entries are only shown
under "System status" if a solar module
VR68/2 is connected.

Menu ¬ Information

Select the "Information" list entry in selection level 1 to
reach selection level 2 with the list entries "System sta­tus", "Solar yield", "Contact details" and "Serial
number".

Reading the system status
Menu ¬ Information ¬ System status

Select "System status" to read a list of the current sys­tem values: Status, Water pressure, Domestic hot water
and the current values for "HEATING 1" and, if relevant,
"HEATING 2".
There is also information under "System status":

– regarding the active period ("Auto day temp until"),
– regarding exceptions in the time programmes, which

you may have set using the "Days away from home"
and "Days at home" functions.

Only the desired temperatures for "Day temperature"
and "Night temperature" can be also set directly under
"System status". All other values are set in other places
in the menu structure, as described in the following sec­tions.

The "Room temperature" list entry is only

shown under "System status" if a remote con-

i

trol unit VR 81/2 is connected.

The "Solar yield" list entry is only shown

under "Information" if a solar module VR68/2

i

Display solar statistics (only with a connected
VR68/2)
Menu ¬ Information ¬ Solar yield

The diagram under "Solar yield" shows a comparison of
the monthly solar yields of the previous year and of the
current year as well as the peak values of the last
month.

Display installer contact details
Menu ¬ Information ¬ Contact details

If the heating engineer entered his company name and
telephone number during the installation, you can read
this data under "Contact details".

Reading the serial number and article number
Menu ¬ Information ¬ Serial number

"Serial number" shows the serial number of the unit,
which the heating engineer may require you to tell him.
The article number is found in the second line of the
serial number (¬Fig. 4.10).

is connected.

Operating instructions VRC 470 0020116689_00

19

Functional description

5

5.1.2 Setting desired temperatures

Menu ¬ Desired temperatures

This function is used to set the desired temperatures for
the heating circuits "HEATING 1", "HEATING 2", if rele­vant, and hot water production.

"HEATING 2" is only shown under "Desired

temperatures" if a mixer module VR 61/2 is

i

For the heating circuits
Menu ¬ Desired temperatures ¬ HEATING 1 and, if
relevant, HEATING 2

b

connected. "HEATING 2" has the same read
options and settings as "HEATING 1".

Caution!

Risk of damage due to frost!

If rooms are not adequately heated, this can
cause damage to the building and to the
heating system.

> If you are absent during a frosty spell,

ensure that the heating system remains in
operation and provides adequate frost
protection.

You can set two different desired temperatures for the
heating circuits.

– 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 night temperature is the temperature

that you wish to have in the rooms during the night
or when you are away from home ( Night mode).

For hot water production
Menu ¬ Desired temperatures ¬ Domestic hot water

You can only use the controller's functions and setting
options for hot water production if a domestic hot water
cylinder is connected to the heating system.

Danger!

Risk of being scalded by hot water!

a

You can set the desired "Hot water" temperature for the
domestic hot water.

There is a danger of scalding at the hot water
draw-off points if the temperatures are
greater than 60 °C. Young children and eld­erly persons can even be at danger at lower
temperatures.

> Select the temperature so that nobody is

at risk.

20

Operating instructions VRC 470 0020116689_00

5.1.3 Setting timer programmes

Functional description

5

Desired
day

Temperature

21 °

Desired
night
temperature

16 °

Fig. 5.1 Example: Three periods in one day

Menu ¬ Time programmes

Select the "Time programmes" function to set the peri­ods for the heating circuit and for hot water production.
If you have not set any periods, the controller uses the
periods set in the factory settings (¬Tab. 4.2).
You can only use the controller's functions and setting
options for hot water production if a domestic hot water
cylinder is connected to the heating system.
You can only use the controller's functions and setting
options for circulation if circulation pipes and a circula­tion pump are connected to the heating system.
The time programmes are only effective for the heating
circuit in "Automatic mode" and are only effective for
hot water production in "Automatic mode" and "Summer
mode".

"HEATING 2" is only shown under "Time pro-

grammes" if a mixer module VR 61/2 is con-

i

Periods for the heating circuit

Set the period for the heating circuit so that each
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 "Night" temperature.

nected. "HEATING 2" has the same read
options and settings as "HEATING 1".

temperature

Desired night temperature

Period 1

06:00 18:0008:00 16:30

Desired
day
temperature

Period 2

The heating engineer can set a pre-heat time

and a pre-switch-off time for the heating cir-

i

Periods for hot water production

Set the periods for hot water production so that each
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" temperature.

– ends approx. 30 minutes before the time at which you

no longer need any hot water.

Set the periods for circulation so that each period:

– starts approx. 30 minutes after the start of a period

for hot water production,

– ends approx. 30 minutes before the end of a period

for hot water production.

Periods for days and blocks

You can set individual days or blocks of days for which
the periods should apply:

– Monday, Tuesday, Wednesday, Thursday, Friday, Satur-

day, Sunday

– Monday - Friday, Saturday - Sunday,

Monday - Sunday

For each day and block, you can set up to three periods.

cuit, so that you can set the period for the
desired "Day" and "Night" temperatures
exactly to the times at which the room tem­perature should reach the desired tempera­ture. Ask the heating engineer if he has set a
pre-heat time or a pre-switch-off time.

Desired

night

temperature

20:00

Desired
day
temperature

Period 3

22:30

Desired
night
temperature

Time

Operating instructions VRC 470 0020116689_00

The periods set for a day have priority over

the periods set for a block.

i

21

Functional description

5

Example: Three periods on one day (¬Fig. 5.1)

Desired temperature "Day": 21 °C
Desired temperature "Night": 16 °C
Period 1: 06.00 - 08.00
Period 2: 16.30 - 18.00
Period 3: 20.00 - 22.30
Within the period, the controller brings the room tem­perature to the set desired "Day" temperature (Comfort
mode).
Outside the period, the controller brings the room tem­perature to the set desired "Night" temperature (Night
mode).

Examples of individual days:

Monday
Period 1: 06.00 - 07.30

Saturday
Period 1: 07.30 - 10.00
Period 2: 12.00 - 23.30

Examples of blocks:

Monday - Friday
Period 1: 06.30 - 08.00
Period 2: 12.00 - 13.00
Period 3: 17.00 - 22.00

Individual days

vary from

Mo - Su block.

OkBack

Fig. 5.3 Exception to the time programme message

The set times for the block marked with "!!" can be
viewed and changed if you press the right function key
"Ok" in the display.

For the heating circuits:
Menu ¬ Time programmes ¬ HEATING 1 and, if rele­vant, HEATING 2

In each set period, the desired temperature that you set
in the "Desired temperatures" function applies.
Within the period, the controller switches to Comfort
mode and the heating circuit heats the connected rooms
to the desired "Day" temperature.
Outside the period, the controller switches to the mode
that the heating engineer has set: Frost protection, Eco­nomical, or Night temperature (¬Section5.2.1).

Saturday - Sunday
Period 1: 08.00 - 22.00

Setting time programmes quickly:

If, for example, you need a different period for just one
working day in the week, first set the times for the
entire block "Monday - Friday". Then set the different
period for the working day.

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 "!!" .

Monday - Sunday

Period 1:
Period 2:
Period 3:

Back

Fig. 5.2 Identification of different days

If you press the right function key "Select", then a mes­sage appears on the display which informs you about
different periods. You do not need to align the times.

!! : !! - !! : !!
!! : !! - !! : !!
!! : !! - !! : !!

Select

For hot water production:
Menu ¬ Time programmes ¬ Domestic hot water ¬
Preparation

In each set period, the desired hot water temperature
that you set in the "Desired temperatures" function
applies.
Within the period, the hot water is available at the tem­perature set by you. If, during the period, the cylinder
temperature is 5 °C lower than the desired hot water
temperature, the domestic hot water cylinder is again
heated to the desired hot water temperature. At the end
of a period, the controller switches the hot water pro­duction off, until the start of the next period.

For circulation:
Menu ¬ Time programmes ¬ Domestic hot water¬
Circulation

The set periods determine the operating times for circu­lation. Within the period, circulation is activated. Outside
the period, circulation is deactivated.
Coordinate the periods for circulation with the periods
for hot water production. If, for example, the period for
hot water production starts at 05:00, then the period
for circulation should start 30 minutes later at 05:30.

22

Operating instructions VRC 470 0020116689_00

Functional description

5

5.1.4 Days away from home scheduling

Menu ¬ Days away from home scheduling ¬ HEATING
1 and, if relevant, HEATING 2

With this function, you can 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
periods for which you have set, for example, no reduc­tion of the desired temperature over the course of the
day.
Hot water production and circulation are switched off
and 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 system returns to the pre-set mode.

"HEATING 2" is only shown under "Days

awayfrom home scheduling" if a mixer mod-

i

5.1.5 Days at home scheduling

Menu ¬ Days at home scheduling ¬ HEATING 1 and, if
relevant, HEATING 2

With this function, you set the desired "Day" tempera­ture for days which you spend at home. This means you
do not need to change the periods which you have
already set, for example, with an decrease in the desired
temperature during the day.
Within the specified period, the heating system 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 system returns to the pre-set
mode.

i

ule VR61/2 is connected. "HEATING 2" has
the same read options and settings as
"HEATING1".

"HEATING 2" is only shown under "Days at

home scheduling" if a mixer module VR 61/2
is connected. "HEATING 2" has the same read
options and settings as "HEATING 1".

5.1.6 Language selection

Menu ¬ Basic settings ¬ Language

During installation, the heating engineer sets

the desired language. All functions are dis-

i

If the language of e.g. a service technician differs from
the set language, you can change the language using
this function.

b

However, if the text in the display should appear in a lan­guage that you do not understand, you can set a differ­ent language as follows:

> Repeatedly press the left function key until the basic

display appears.
> Press the left function key once again.
> Turn the control knob to the left until the second list

entry above the dotted line is highlighted.
> Press the right function key twice.
> Turn the control knob (to the right or left) until you

find a language you understand.
> Press the right function key.

5.1.7 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.

5.1.8 Setting the date

played in the set language.

Caution!

It may not be possible to operate the con­troller if the wrong language is selected.

If you select a language that you do not
understand, you can no longer read the text
in the controller display and can no longer
operate the controller.

> Only select a language that you under-

stand.

Operating instructions VRC 470 0020116689_00

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.

23

5 Functional description

5.1.9 Changing over to daylight-saving time

Menu ¬ Basic settings ¬ Date / Time ¬ Day-light
savings

If the external sensor is not fitted with a DCF77 receiver
or if no DCF77 signal can be received, you can use this
function to set manual switchover to daylight savings
time.

– "Auto": the controller automatically switches to day-

light savings time in accordance with the DCF77 sig­nal.

– "Off": you must switch over to daylight savings time

manually.

Daylight savings time means Central Euro-

pean summer time: Start = last Sunday in

i

5.1.10 Setting the display contrast

Menu ¬ Basic settings ¬ Display ¬ Display contrast

You can set the display contrast in relation to the bright­ness of the surroundings, to ensure that the display is
clearly legible.

5.1.11 Setting the offset room temperature

March, End = last Sunday in October.

5.1.12 Setting the offset outside temperature

Menu ¬ Basic settings ¬ Display ¬ Offset outside
temp.

The thermometer in the controller's external sensor
measures the outside temperature. If you have mounted
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 a temperature
that is one degree higher than the current room temper­ature on the controller display.
With the "Offset outside temp." 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 com­pensator.

5.1.13 Changing heating circuit naming

Menu ¬ Basic settings ¬ Change heating circuit
naming

You can change the factory-set names for the heating
circuits "HEATING 1" and, if relevant "HEATING 2" as you
wish. The name is limited to 10 characters.

Menu ¬ Basic settings ¬ Display ¬ Offset room temp.

The controller can only show the current

room temperature if it is installed in a living

i

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 "Offset room temp." 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 room tempera­ture compensator.

room.

5.1.14 Restoring the factory settings

Menu ¬ Basic settings ¬ Factory reset

You can reset the settings for the "Time programmes"
or for "Everything" to the factory settings.

Time programmes
Menu ¬ Basic settings ¬ Factory reset ¬ Time
programmes

Before you reset the time programmes to the

factory settings, make a note of the controller

i

With "Time programmes", you will reset all the settings
you have made in the "Time programmes" function to
the factory settings. All other settings that include
times, such as "Date / Time", are not affected.
While the controller is resetting the "Time programmes"
settings to the factory settings, "in process" is shown on
the display. Then the basic display is displayed.

settings (¬Tab. 4.2).

24

Operating instructions VRC 470 0020116689_00

Functional description

5

Everything
Menu ¬ Basic settings ¬ Factory reset ¬ Everything

Caution!

Risk of a malfunction!

b

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 heating engineer may operate.

5.1.15 Installer level

Installer level is reserved for the heating engineer and is
therefore protected by an access code.
At this operating level the heating engineer can make
the necessary settings.

The function "Everything" restores all settings
to the factory settings, including those set by
the heating engineer. It may be that it is no
longer possible to operate the heating system
after this.

> Arrange for the heating engineer to reset

all settings to factory settings.

5.2 Modes

You can set the modes using the right function key
"Mode" and, if relevant, also by means of the left func­tion key "Menu" under "Basic settings".

The "Mode" list entry is only shown under

"Basic settings" and, further down, also the

i

Use the right function key "Mode" to set the mode
directly. The set mode only applies to the heating circuit
that has been pre-set by the heating engineer ("HEAT­ING 1" or "HEATING 2" or "HEATING 1 and HEATING 2").
Only if a mixer module VR 61/2 is connected for a sec­ond heating circuit and both heating circuits are acti­vated can you also set the mode via the left function key
"Menu". You can then set the modes for "HEATING 1"
and "HEATING 2" separately.

The path details given at the start of each mode descrip­tion indicate how you reach this mode in the menu
structure.

5.2.1 Modes for the heating circuit

"HEATING 1" and "HEATING 2" list entries, if a
mixer module VR 61/2 is connected.

Automatic mode
Mode ¬ (current operating mode) ¬ Automatic mode

or where applicable

Menu ¬ Basic settings ¬ Mode ¬ HEATING 1 and, if
relevant, HEATING 2 ¬ (current mode) ¬ Automatic
mode

Automatic mode controls the heating circuits according
to the set desired "Day" temperature, the set periods,
the desired "Night" temperature set by the heating engi­neer and the heating curve.
In the "Time programmes" function, you have set peri­ods for the heating circuits. If you have not set any peri­ods, the controller uses the periods set in the factory
settings in automatic mode (¬Tab. 4.2).
Within the periods, the controller brings the room tem­perature to the set desired "Day" temperature (Comfort
mode).
Outside the periods, the controller regulates in accord­ance with the mode set by the heating engineer.

Operating instructions VRC 470 0020116689_00

25

Functional description

5

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 "Night" temperature.
Even though the heating function is on, the burner is
only active as required.
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 desired "Night" temperature.
When installing your controller, the heating engineer can
specify the control functions for the times outside the
periods and the heating curve.

> Discuss with the heating engineer which settings are

optimum for you.

Summer mode
Mode ¬ (current mode) ¬ Summer mode

or where applicable

Menu ¬ Basic settings ¬ Mode ¬ HEATING 1 and, if
relevant, HEATING 2 ¬ (current mode)

The heating function is switched off for the selected
heating circuit and the frost protection function is
active. Hot water production and circulation are regu­lated by the controller in accordance with the periods
set.

Comfort mode
Mode ¬ (current operating mode) ¬ Comfort mode

or where applicable

Menu ¬ Basic settings ¬ Mode ¬ HEATING 1 and, if
relevant, HEATING 2 ¬ (current mode) ¬ Comfort
mode

The "Comfort mode" controls "HEATING 1" and, if rele­vant, "HEATING 2" at the set desired "Day" tempera­tures without taking periods into account.

Set-back mode
Mode ¬ (current mode) ¬ Set-back mode

or where applicable

Menu ¬ Basic settings ¬ Mode ¬ HEATING 1 and, if
relevant, HEATING 2 ¬ (current mode) ¬ Set-back
mode

The "Set-back mode" controls "HEATING 1" and, if rele­vant, "HEATING 2" at the set desired "Night" tempera­tures without taking periods into account.

S

ystem OFF

Mode ¬ (current mode) ¬ System OFF

or where applicable

Menu ¬ Basic settings ¬ Mode ¬ HEATING 1 and, if
relevant, HEATING 2 ¬ (current Mode) ¬ System OFF

The heating function is switched off. The frost protection
function is activated.

5.2.2 Modes for hot water production and
circulation

The mode for hot water production and circu-

lation depends on the set mode for heating

i
i

If the heating system is equipped with one heating cir­cuit, the controller regulates the hot water production
and, if relevant, the circulation in accordance with the
mode for this heating circuit.
If the heating system is equipped with two heating cir­cuits, the heating engineer can define which heating cir­cuit controls the hot water production and, if relevant,
the circulation.

Automatic mode and Summer mode

Automatic mode and Summer mode control the hot
water production in accordance with the set desired
temperature for "hot water" and the set periods. In the
"Time programmes" function, you have set periods for
hot water production. If you have not set any periods,
the controller uses the period set in the factory settings
for hot water production (¬Tab. 4.2).
Within the period, hot water production is switched on
and keeps the hot water in the domestic hot water cylin­der at the set temperature. Outside the period, hot
water production is deactivated.
Automatic mode and Summer mode control the circula­tion of hot water in the hot water pipes in accordance
with the set periods.
Within the periods, circulation is activated and outside
the periods it is deactivated.

Comfort mode

Comfort mode controls hot water production in accord­ance with the set desired temperature for hot water
without taking periods into account.
Circulation is activated and the periods for circulation
are not observed.

circuits "HEATING 1" and, if relevant, "HEAT­ING 2". No other mode can be set.

If you have assigned different functions,

modes or advanced functions to two inde­pendent heating circuits, then the controller
assigns the mode with the greater heat
requirement to hot water production and cir­culation (¬Tab. 5.1).

26

Operating instructions VRC 470 0020116689_00

Set-back mode and System OFF

Hot water production and circulation are off. The frost
protection function is activated.

With two independent heating circuits:

If the heating system has two independent heating cir­cuits, the controller always assigns the mode with the
greater heat requirement to hot water production and
circulation. To find out which mode this is, see the table
(¬Tab. 5.1).

Example:

If you operate Circuit 1 in "Auto" mode and Circuit 2 in
"Comfort" mode, the controller assigns "Comfort" mode
to hot water production and circulation.

Functional description

5

Heating

circuit

Heating
circuit 1

Auto Auto Day Auto Auto Auto Auto Auto Auto Day

Day Day Day Day Day Day Day Day Day Day

Set-back Auto Day Off Auto Auto Off Auto Off Day

Summer Auto Day Auto Auto Auto Auto Auto Auto Day

1 day at home Auto Day Auto Auto Auto Auto Auto Auto Day

1 day away from home Auto Day Off Auto Auto Off Auto Off Day

Days at home
scheduling

Days away from home
scheduling

Party function Day Day Day Day Day Day Day Day Day

Tab. 5.1 Modes for hot water production and circulation with

two independent heating circuits

Auto Day Set-back Summer 1 day at

home

2

Auto Day Auto Auto Auto Auto Auto Auto Day

Auto Day Off Auto Auto Off Auto Off Day

1 Day
away
from
home

Days at
home
schedul­ing

Days
away
from
home
schedul­ing

Party
function

Operating instructions VRC 470 0020116689_00

27

Functional description

5

5.3 Advanced functions

Advanced functions can be activated directly from any
mode using the right function key "Mode". In this case,
the activated advanced function only applies to the
heating circuit that has been pre-set by the heating
engineer ("HEATING 1" or "HEATING 2" or "HEATING 1
and HEATING 2").
Only if a mixer module VR 61/2 is connected for a sec­ond heating circuit and both heating circuits are acti­vated can you also activate an advanced function via the
left function key "Menu".
In this case, you can set the advanced function sepa­rately for each heating circuit.
You can cancel an advanced function at any time using
the left function key "Cancel".

The path details given at the start of each advanced
function description indicate how you reach this
advanced function in the menu structure.

5.3.1 Cylinder boost

Operating mode ¬ Cylinder boost

or where applicable

Menu ¬ Basic settings ¬ Mode ¬ HEATING 1 and, if
relevant, HEATING 2 ¬ Cylinder boost

If you have switched off hot water production or
required hot water outside a period, then activate the
"Cylinder boost" advanced function.
The advanced function heats the water in the domestic
hot water cylinder once, until the set desired "hot water"
temperature is reached or until you cancel the advanced
function.
The heating system will then return to the pre-set mode.

5.3.2 Party function

Mode ¬ Party function

or where applicable

Menu ¬ Basic settings ¬ Mode ¬ HEATING 1 and, if
relevant, HEATING 2 ¬ Party function

Party function active

°C

21,5

Desired temperature 22,0°C

Cancel

Fig. 5.4 Example: Advanced "Party function" mode activated

If you wish to switch on the heating circuit, the hot
water production and circulation temporarily, e.g. during
a party, activate the "Party function" advanced function.
This means you do not need to change the settings on
the heating system for short periods of time.
The advanced function brings the room temperature to
the set desired "Day" temperature, in accordance with
the set periods.
If the display shows "Party function active", you can set
the desired temperature (Day) for the heating circuit
with the control knob. The setting applies for as long as
the advanced function is active.
The advanced function is deactivated when the next
period starts or if you cancel the advanced function first.
The heating system will then return to the pre-set mode.

28

Operating instructions VRC 470 0020116689_00

Functional description

5

5.3.3 1 Day away from home

Mode ¬ 1 Day away from home

or where applicable

Menu ¬ Basic settings ¬ Mode ¬ HEATING 1 and, if
relevant, HEATING 2 ¬ 1 Day away from home

If you are only away from home for one day, e.g. for a
day trip, activate the "1 Day away from home" advanced
function. This means you do not need to change the set
periods, which you have set with, e.g., an increase in the
room temperature during the day.
The advanced function brings the room temperature to
the desired "Night" temperature. Hot water production
and circulation are switched off and the frost protection
is activated.
If the display shows "1 Day away from home active", you
can set the desired temperature (Night) for the heating
circuit with the control knob.
The advanced function is automatically deactivated after
24:00 hours or if you cancel the advanced function first.
The heating system will then return to the pre-set mode.

5.3.4 1 day at home

Mode ¬ 1 day at home

or where applicable

Menu ¬ Basic settings ¬ Mode ¬ HEATING 1 and, if
relevant, HEATING 2 ¬ 1 day at home

If you are spending a week day at home, e.g on a public
holiday, then activate the "1 day at home" advanced
function. The advanced function activates "Automatic
mode" for one day with the settings for "Sunday", as set
using the "Time programmes" function.
If the display shows "1 day at home active", you can set
the desired temperature (Day) for the heating circuit
with the control knob.
The advanced function is automatically deactivated after
24:00 hours or if you cancel the advanced function first.
The heating system will then return to the pre-set mode.

5.3.5 Ventilation boost

Mode ¬ Ventilation boost

or where applicable

Menu ¬ Basic settings ¬ Mode ¬ HEATING 1 and, if
relevant, HEATING 2 ¬ Ventilation boost

If you wish to switch the heating circuit off during venti­lation of the living rooms, activate the "Ventilation
boost" advanced function. This advanced function
switches the heating circuit off for 30 minutes. The frost
protection function is activated, and hot water produc­tion and circulation remain active.
The advanced function is automatically deactivated after
30minutes or if you cancel the advanced function first.
The heating system will then return to the pre-set mode.

Operating instructions VRC 470 0020116689_00

29

Service and troubleshooting

!

6

6 Service and troubleshooting

6.1 Service

If a service is required, the controller displays a service
message in the display.

Caution!

Risk of damage to the heating system due

b

to failure to perform maintenance work!

A service message indicates that the heating
system must be serviced by the heating engi­neer. Failure to take notice of these service
messages, could lead to material damage or
breakdown of the heating system.

> If the controller displays a service message,

inform a heating engineer.

Service heat generator

19°C

Desired temperature 21°C

6.3 Detecting and rectifying malfunctions

If a fault occurs in the heating system, the controller dis­plays an error message in the display.

Caution!

Risk of damage to the heating system due

b

to failure to perform troubleshooting work!

An error message indicates that the heating
engineer must perform troubleshooting or
repair work on the heating system. Failure to
take notice of these error messages could
lead to material damage or breakdown of the
heating system.

> If the controller displays an error message,

inform a heating engineer.

Heat generator fault

Back

Fig. 6.2 Example of an error message

Menu Mode

Fig. 6.1 Example of a service message

The heating engineer can set a period in the controller
for the next service interval for the heating system or
boiler. At the end of the service interval the service
warning will appear on the fist line of the basic display.
The following service messages may appear:

– "Service heat generator"
– "Service" (of the heating system).

6.2 Cleaning the controller

> Clean the casing of the controller with a damp cloth.
> Never use scouring or cleaning agents which could

damage the operating elements or the display.

If the screen remains dark or you are unable to make
any changes using the function keys or control knob,
then there is a unit fault for which the controller has
been unable to display an error message.

> Inform a heating engineer.

If the controller shows an error message in the display
instead of the basic display and you press the left func­tion key "Back", then the basic display appears again.
You can also read current error messages under "Menu
¬ Information ¬ System status ¬ Status". As soon as an
error message for the heating system appears, the "Sta­tus" setting will show "Fault". In this case the right func­tion key has the function "Display".

> Press the right function key "Display" to display the

list of error messages.

30

Operating instructions VRC 470 0020116689_00

Energy saving tips

7

7 Energy saving tips

Desired "Day" temperature

Set the desired "Day" temperature only as high as would
be necessary for your comfort level. Each extra degree
Celsius would mean an increased energy consumption of
about 6%.
Adjust the room temperature according to the purpose
of use of the room, using the thermostatic radiator
valve. For example, it is not necessary to heat bedrooms
or seldom used rooms to 20 °C.

Desired "Night" temperature

If you do not need a high room temperature, e.g. during
the night or if you are away from home, then reduce the
room temperature. To do this, set the desired "Night"
temperature in the "Desired temperature" function.
Set the desired "Night" temperature approx. 6 °C lower
than the desired "Day" temperature. A temperature
more than 6 °C lower does not bring any further energy
saving, because then a greater amount of energy would
be required the next time the system had to heat up to
the desired "Day" temperature.
In addition, use the "Time programmes" function to
define times during which you do not need a high room
temperature. The periods for heating are active in "Auto­matic mode".
If you are absent for longer periods of time, e.g. on holi­day, then it is worth lowering the temperature even fur­ther. To do this, set the temperature using the "Days
away from home scheduling" function.

Uniform heating

Often, in a dwelling with central heating, only one room
is heated. Through the encapsulation surfaces of this
room, i.e. walls, doors, windows, roofs, floors, the
unheated adjoining rooms are also heated in an unregu­lated manner, i.e. unwanted heat energy is lost. The
capacity of the radiator of this one heated room is obvi­ously not enough for such an operating mode. The result
is that the room can no longer be heated adequately
and there is an uncomfortable feeling of cold. The same
effect arises when doors between heated and unheated/
barely heated rooms are left open.
This is false economy: The heating is in operation and
still the room temperature is not comfortably warm.
If you heat all rooms evenly and according to their use,
then you will achieve a comfortable room climate and
energy-saving operation.

Thermostatic radiator valves and room temperature­compensated controller

Thermostatic radiator valves on the radiators maintain
the room temperature exactly once set.
Exception: The thermostatic radiator valves on the radia­tors in the room in which the controller is mounted,
must be turned fully open. The radiators are then con­trolled by the controller and thus maintain the set room
temperature.
You can adjust the room temperature to suit your indi­vidual requirements and ensure economical operation of
your heating system using the thermostatic radiator
valves in combination with a room temperature-compen­sated controller.

Do not obstruct the controller

The controller must be able to record the circulating
room air unhindered. Do not obstruct the controller with
furniture, curtains or other objects.

Economic hot water production

Set the "Domestic hot water" desired temperature of
your domestic hot water cylinder only to the tempera­ture you actually need, and under no circumstances
higher than 60 °C.
You should also use the "Time programmes" function for
hot water production in "Automatic mode" or "Summer
mode". Set the period so that the water is brought to
the desired "hot water" temperature shortly before it is
needed, e.g. in the morning after getting up and in the
evening after you return home.
If you do not need any hot water for a longer period of
time, switch hot water production off.
If you need hot water rarely or outside the set periods,
use the function "Cylinder boost".
Use the "Time programmes" function for circulation to
save energy. This will ensure that you have hot water
available immediately from the tap immediately when
you need it. During other times, the circulation pump is
switched off and you must let the water run for slightly
longer before hot water comes out of the tap, for exam­ple.

Ventilate correctly

A ventilation boost with fully opened windows and,
where possible, with a draught is essential for the room
climate and room temperature. The room air will be
replaced by outside air in 5 to 10 minutes during a venti­lation boost. The air humidity falls and the room is eas­ier to heat up. You will feel warmed even if the room
temperature is the same.
Use the advanced "Ventilation boost" function to control
the heating system in an energy-saving manner during
the ventilation boost.

Operating instructions VRC 470 0020116689_00

31

Warranty and customer service

8

8 Warranty and customer service

8.1 Vaillant warranty

We only grant a Vaillant manufacturers warranty if a
suitably qualified engineer has installed the system in
accordance with Vaillant instructions. The system owner
will be granted a warranty in accordance with theVaillant
terms and conditions. All requests for work during the
guarantee period must be made to Vaillant Service Solu­tions (0870 6060 777).

8.2 Vaillant Service

To ensure regular servicing, it is strongly recommended
that arrangements are made for a Maintenance Agree­ment. Please contact Vaillant Service Solutions(0870
6060 777) for further details.

32

Operating instructions VRC 470 0020116689_00

9 Decommissioning

9.1 Replacing the controller

To replace the controller in the heating system with a
new one, the heating system needs to be shut down.

> These works should be carried out by a heating engi-

neer.

9.2 Recycling and disposal

The controller and the associated transport packaging
consists largely of recyclable materials.

Unit

Neither the controller or any of its accessories belong in
the household waste. Ensure that old units and any
existing accessories are disposed of properly.

Packaging

Leave the disposal of the transport packaging to the
approved qualified servicing company that installed the
unit.

Decommissioning

9

Operating instructions VRC 470 0020116689_00

33

Technical data

10

10 Technical data

Description Unit VRC 470

Operating voltage Umax V 24

Current consumption mA < 50

Cross-section of
supply lines

Protection type - IP 20

Protection class - III

Maximum permissible
ambient temperature

Height mm 115

Width mm 147

Depth mm 50

Tab. 10.1 Technical data VRC 470

2

mm

°C 50

0.75…1.5

34

Operating instructions VRC 470 0020116689_00

Glossary

11

11 Glossary

Circulation

A circulation pump heats water in the circuit through
the hot water pipes. This means the hot water pipes do
not cool so rapidly. If you open a tap, hot water comes
out of the tap immediately. You can set a period for cir­culation in order to save energy.

DCF77 receiver

A DCF77 receiver receives a time signal. The time signal
sets the time and date automatically. The time and date
provide automatic switching between daylight savings
time and standard time.

Error message

An error message shows you that the heating system
has notified a fault to the controller.

Flow temperature

The boiler heats water which is pumped through the
heating installation. The temperature of this hot water
as it leaves the boiler is referred to as the flow tempera­ture.

Frost protection delay time

By setting a frost protection delay time (installer level),
the activation of the heating control by the frost protec­tion function (outside temperature <3 °C) is delayed for
a specified time (1 to 12hrs.). The set frost protection
delay time also works in the "ECO" setting. The frost
protection delay time starts when the outside tempera­ture drops below 3 °C.

Heating circuit

A heating circuit is a closed circulation system of pipes
and heat consumers (e. g. radiators). The heated water
from the boiler flows into the heating circuit and returns
to the boiler as cooled water.
A heating installation usually has at least one heating
circuit. However additional heating circuits can be con­nected, e.g. to supply several dwellings or additional
underfloor heating.

Heating curve

A heating curve shows the relationship between the out­side temperature and the flow temperature. By selecting
a more or less steep heating curve, the heating engineer
can influence the flow temperature and thus also the
room temperature as a function of the outside tempera­ture.

Heating installation

The heating installation heats up the dwelling and pro­duces hot water.

Hot water production

The water in the domestic hot water cylinder is heated
by the boiler to the selected desired “hot water” temper­ature. If the temperature in the domestic hot water cyl­inder falls by specific amount, the water is heated up
again to the target “hot water” temperature.

Legionella

Legionella are water-borne bacteria which can quickly
propagate and cause serious lung diseases. Legionella
occur wherever heated water provides the optimum con­ditions for multiplication. Temporarily heating the water
to above 60 °C kills off the legionella.

Operating level for the heating engineer

This operating level contains all the additional functions
that can be changed by the heating engineer; these
should not be changed without specialist knowledge.
This level is reserved for the heating engineer and is
therefore protected by an access code.

Operating level for the operator

This operating level contains all the functions available
to be changed by the operator.

Period

A period is a pre-set, defined period of time during
which the boiler, hot water production or the circulation
pump is on.

Pre-heat time

If the heating engineer has set a pre-heat time, then the
controller starts the heating circuit already during the
set pre-heat time before the first period of the day, so
that the desired “Day” temperature is reached already
at the start of the first period.

Pre-switch-off time

If the heating engineer has set a pre-switch-off time,
then the heating system is not unnecessarily heated to
the desired “Day” temperature during the set pre­switch-off time before the end of a period.

Protection class

Protection class denotes the classification and identifica­tion of electrical equipment with reference to the exist­ing safety measures to prevent electric shocks.

Protection type

The level of protection indicates the suitability of electri­cal equipment for various ambient conditions and addi­tionally the protection of people from potential hazards
during their use.

Room temperature

The room temperature is the temperature actually
measured in the dwelling.

Operating instructions VRC 470 0020116689_00

35

Glossary

11

Selection level

Via a selection level, you access the next level of the
menu structure or settings that you can change.

Set-back temperature

The set-back temperature is the desired “Night” temper­ature, to which the controller lowers the room tempera­ture outside the set period (Night mode).

Solar yield

The heat energy obtained by a solar system in a defined
period (usually one year). This heat energy is used to
heat up the domestic hot water cylinder.

Status message

A status message appears when you have activated an
advanced function. It remains visible for as long as the
advanced function is active.

Target hot water temperature

The target hot water temperature is the desired “hot
water” temperature to which you wish to water in the
domestic hot water cylinder.

Target room temperature

The target room temperature is the desired “Day” tem­perature to which you wish to heat the dwelling (Com­fort mode).

Weather compensation

Automatic change to the hot water temperature depend­ing on the outside temperature.
The outside temperature is measured by a separate sen­sor which is mounted in the open air, and the results are
transmitted to the controller. At low outside tempera­tures the controller provides an increased flow tempera­ture; at higher outside temperatures the flow tempera­ture is reduced.

Thermostatic radiator valve

Thermostatic radiator valves are mounted on radiators
and control the room temperature to the set value. If the
room temperature rises above the pre-set value, the
thermostatic radiator valve reduces the heating water
flow rate. If the room temperature falls below the pre-set
value, the thermostatic radiator valve opens and the
heating water flow rate increases and the room temper­ature rises again.

Timer programme

If you operate the heating system in "Auto" mode, then
you activate periods during which the controller
switches the heating system on and heats the connected
rooms to the set desired "Day" temperature (Comfort
mode). Outside these periods, the controller switches
the heating system to night mode and allows the heated
rooms to cool down to the set desired "Night" tempera­ture (Night mode). When the desired "Night" tempera­ture is reached, the controller maintains the room tem­perature prevents the heated rooms from cooling fur­ther until the start of the next period.

With time programmes, you can also control the hot
water production and circulation in such a way that hot
water is available in the set periods with the set desired
"hot water" temperature.

36

Operating instructions VRC 470 0020116689_00

Index

Index

A

Anti-Legionella function ....................................................... 4

Article number ......................................................................... 3

Automatic mode

ECO ...................................................................................... 26

Frost protection ................................................................ 26

Set-back temperature ..................................................... 26

B

Basic display ............................................................................. 7

C

Changing over to daylight-saving time ........................... 24

Circulation ................................................................................. 6

Comfort mode ....................................................................... 20

Control knob ............................................................................. 6

Customer service .................................................................. 32

Cylinder boost ....................................................................... 28

D

Day at home ........................................................................... 29

Day at home scheduling ..................................................... 23

Day away from home ........................................................... 29

Days away from home scheduling .................................... 23

Desired day temperature .................................................... 20

Desired night temperature ................................................. 20

Display fields ............................................................................ 8

Disposal ................................................................................... 33

Domestic hot water cylinder ................................................. 6

H

HEATING 1 .................................................................................. 6

HEATING 2 ................................................................................. 6

Heating circuit comfort mode ........................................... 26

Heating circuits ........................................................................ 6

Heating circuit summer mode ........................................... 26

Heating circuit system off .................................................. 26

Hot water production.............................................................. 6

Set-back mode ................................................................... 27

System Off .......................................................................... 27

Hot water production automatic mode ........................... 26

Hot water production comfort mode ............................... 26

Hot water production summer mode .............................. 26

Hot water production system off ....................................... 27

I

Identification plate .................................................................. 3

Installer level .......................................................................... 25

Intended use ............................................................................ 4

L

Language selection .............................................................. 23

M

Menu .......................................................................................... 8

Menu structure .................................................................... 7, 11

Modes for hot water production ....................................... 26

Modes for the heating circuit ............................................ 25

E

Energy saving tips ................................................................. 31

Expansion module ................................................................. 19

F

Faults........................................................................................ 30

Frost protection ................................................................. 5, 25

Frost protection delay time ................................................ 26

Frost protection function ....................................................... 6

Function key ............................................................................. 8

Functions ................................................................................. 19

Operating instructions VRC 470 0020116689_00

N

Night mode ............................................................................. 20

O

Operating modes ................................................................... 19

Operation ................................................................................... 9

Operating level for the heating engineer ..................... 7

Operating level for the operator ..................................... 7

Outside temperature ............................................................... 6

Overview of menu structure ................................................ 11

Overview of modes ................................................................ 14

Overview of operating levels .............................................. 15

37

Index

P

Party function ........................................................................ 28

Periods ..................................................................................... 21

Periods for blocks .................................................................. 21

Periods for days ..................................................................... 21

R

Reading the system status .................................................. 19

Restoring the factory settings ........................................... 24

S

Safety information ................................................................. 4

Selection levels ....................................................................... 8

Serial number ........................................................................... 3

Service ..................................................................................... 30

Set-back mode ....................................................................... 26

Setting desired temperatures ............................................ 20

Setting level ............................................................................. 8

Setting the date .................................................................... 23

Setting the display contrast ............................................... 24

Setting the operating mode ................................................. 8

Setting the time .................................................................... 23

Soft key function .................................................................... 8

Solar statistics ........................................................................ 19

Solar yield ................................................................................ 19

Special operating modes .............................................. 19, 28

Status ........................................................................................ 19

T

Technical data ........................................................................ 34

Type overview ........................................................................... 3

V

Ventilation boost ................................................................... 29

W

Warranty ................................................................................. 32

Water pressure ....................................................................... 19

Weather compensation .......................................................... 6

38

Operating instructions VRC 470 0020116689_00

*2702408_rev0*

Supplier

Manufacturer

0020116689_00 GBIE 042011 – Subject to change