Viessmann Vitotrol 350 User manual

Operating instructions
for the system user
Viesmann
Remote control unit
VITOTROL 350
5677 786 GB 3/2015 Please keep safe.

2
Please follow these safety instructions closely to
prevent accidents and material losses.
Safety instructions explained
Danger
This symbol warns against the risk of injury.
!Please note
This symbol warns against the risk of material
losses and environmental pollution.
Note
Details identified by the word "Note" contain additional
information.
Target group
These operating instructions are intended for heating
system users.
This appliance can also be operated by children 8
years and older, as well as by individuals with reduced
physical, sensory or mental faculties or those lacking
in experience and knowledge, provided such individu-
als are being supervised or have been instructed in the
safe use of this appliance and any risks arising from it.
!Please note
Supervise children in the proximity of the appli-
ance.
■Never permit children to play with the appli-
ance.
■Cleaning and maintenance must not be car-
ried out by unsupervised children.
Appliance connection
■The appliance may only be connected and commis-
sioned by authorised contractors.
■Only operate the appliance with suitable fuels.
■Observe the specified electrical connection require-
ments.
■Modifications to the existing installation may only be
carried out by authorised contractors.
Danger
Incorrectly executed work on the heating system
can lead to life threatening accidents.
■Work on gas installations must only be carried
out by a registered gas fitter.
■Work on electrical equipment must only be
carried out by a qualified electrician.
Work on the appliance
■All settings and work on the appliance must be car-
ried out as specified in these operating instructions.
Further work on the appliance may only be carried
out by authorised contractors.
■Never open the appliance.
■Never remove casings.
■Never change or remove attachments or fitted
accessories.
■Never open or retighten pipe connections.
Danger
Hot surfaces can cause burns.
■Never open the appliance.
■Never touch the hot surfaces of uninsulated
pipes, fittings or flue pipes.
Damage to the appliance
Danger
Damaged equipment poses a safety hazard.
Check the appliance for external damage. Never
start up a damaged appliance.
If you smell gas
Danger
Escaping gas can lead to explosions which may
result in serious injury.
■Never smoke. Prevent naked flames and
sparks. Never switch lights or electrical appli-
ances on or off.
■Close the gas shut-off valve.
■Open windows and doors.
■Evacuate any people from the danger zone.
■Notify your gas and power supply utility and
your local heating contractor from outside the
building.
■Have the power supply to the building shut off
from a safe place (outside the building).
If you smell flue gas
Danger
Flue gas can lead to life threatening poisoning.
■Shut down the heating system.
■Ventilate the installation site.
■Close all doors in the living space.
In case of fire
Danger
Fire presents a risk of burns and explosion.
■Shut down the heating system.
■Close the shut-off valves in the fuel supply
lines.
■Use a tested fire extinguisher, class ABC.
Safety instructions
For your safety
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In case of water leaking from the appliance
Danger
Water leaking from the appliance poses an elec-
trocution hazard.
■Switch off the heating system at the external
isolation point (e.g. fuse box, domestic power
distribution unit).
■Notify your local heating contractor.
What to do if the heating system develops a fault
Danger
Fault messages point to faults in the heating
system. If faults are not rectified, they can have
life threatening consequences.
Never acknowledge fault messages several
times in quick succession. Inform your heating
contractor so the cause can be analysed and
the fault rectified.
Installation room requirements
Danger
Sealed vents result in a lack of combustion air.
This leads to incomplete combustion and the
formation of life threatening carbon monoxide.
Never cover or close existing vents.
Never make any subsequent modifications to
the building characteristics that could affect safe
operation (e.g. cable/pipework routing, cladding
or partitions).
Danger
Easily flammable liquids and materials (e.g.
naphtha, solvents, cleaning agents, paints or
paper) can cause deflagration and fire.
Never store or use such materials in the installa-
tion room or in direct proximity to the heating
system.
!Please note
Incorrect ambient conditions can lead to heating
system damage and can put safe operation at
risk.
■Ensure ambient temperatures are above 0 °C
and below 35 °C.
■Prevent air contamination by halogenated
hydrocarbons (e.g. as contained in paints, sol-
vents or cleaning fluids) and excessive dust
(e.g. through grinding/polishing work).
■Avoid continuously high humidity levels (e.g.
through continuous drying of washing).
Extractors
The operation of appliances that extract air to the out-
side (cooker hoods, extractors, air conditioning units,
etc.) can create negative pressure. If the boiler is oper-
ated at the same time, this can lead to a reverse flow
of the flue gas.
Danger
The simultaneous operation of the boiler and
appliances that extract air to the outside can
result in life threatening poisoning due to
reverse flow of the flue gas.
Take suitable steps to ensure an adequate sup-
ply of combustion air. If necessary, contact your
heating contractor.
Auxiliary components, spare and wearing parts
!Please note
Components not tested with the heating system
may damage the system or affect its function.
Have all installation or replacement work carried
out exclusively by qualified contractors.
Safety instructions
For your safety (cont.)
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1. Introductory information Symbols ................................................................................................. 6
Terminology ........................................................................................... 6
Intended use .......................................................................................... 6
Commissioning ...................................................................................... 7
■Permissible ambient temperature ....................................................... 7
Energy saving tips ................................................................................. 7
Tips for greater comfort ......................................................................... 8
■Central heating ................................................................................... 8
■DHW heating ...................................................................................... 8
2. Operation Controls and symbols ............................................................................ 9
■Programming unit default display ....................................................... 9
■Symbols in the display ........................................................................ 9
■Screensaver ....................................................................................... 9
User prompts ......................................................................................... 10
■Settings made via the default display ................................................. 10
■Settings made via the menu ............................................................... 10
3. Central heating Central heating settings ......................................................................... 12
Selecting the heating circuit ................................................................... 12
Setting central heating temperatures ..................................................... 12
■Setting the room temperature for standard heating mode .................. 12
■Setting the room temperature for reduced heating mode (night set-
back) ................................................................................................... 12
Operating program ................................................................................. 13
■Setting the operating program ............................................................ 13
Time program ........................................................................................ 13
■Setting a time program ....................................................................... 13
Comfort function "Party mode" .............................................................. 14
■Setting "Party mode" ........................................................................... 14
■Terminating "Party mode" ................................................................... 15
Energy saving function "Economy mode" .............................................. 15
■Setting "Economy mode" .................................................................... 15
■Terminating "Economy mode" ............................................................. 15
Energy saving function "Holiday program" ............................................ 15
■Setting "Holiday program" ................................................................... 15
■Terminating the "Holiday program" ..................................................... 16
Heating curve ......................................................................................... 16
■Setting the heating curve via the questionnaire .................................. 16
■Setting the heating curve via standard mode ..................................... 17
■Setting the heating curve via contractor mode ................................... 18
■For technically-minded system users ................................................. 19
4. DHW heating Settings for DHW heating ...................................................................... 21
DHW temperatures ................................................................................ 21
■Changing the set DHW temperature .................................................. 21
Set time program ................................................................................... 21
Automatic time program ......................................................................... 21
Individual time program ......................................................................... 22
Operating status for DHW heating ......................................................... 22
■Starting DHW mode ............................................................................ 22
■Stopping DHW mode .......................................................................... 23
5. Boiler operation Boiler menu ............................................................................................ 24
■Overview display for manually charged boilers .................................. 24
■Overview display for automatically charged boilers ............................ 24
■Call up overview ................................................................................. 25
■Calling up a detailed screen ............................................................... 25
■Symbols in the boiler operation menu ................................................ 25
■Calling up menu points ....................................................................... 25
Index
Index
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6. Local heating network
supply
Local heating network supply ................................................................ 29
Changing the flow temperature of the local heating network supply ..... 29
Setting the holiday program for the local heating network supply ......... 29
7. Further adjustments Display settings ...................................................................................... 31
■Setting the background brightness ..................................................... 31
■Selecting the display brightness in standby mode .............................. 31
■Switching off the display in standby mode .......................................... 31
■Disabling the display briefly ................................................................ 32
■Changing the delay in standby mode ................................................. 32
■Changing the delay for the idle screen ............................................... 32
Setting the time and date ....................................................................... 33
Setting the language .............................................................................. 33
Reinstating factory settings .................................................................... 33
Changing network settings .................................................................... 34
Enabling visualisation ............................................................................ 34
8. Scanning Scanning information ............................................................................. 35
Scanning fault message ........................................................................ 35
Calling up an acknowledged fault message .......................................... 35
9. Appendix Terminology ........................................................................................... 36
Information on disposal .......................................................................... 39
■Disposal of packaging ........................................................................ 39
■Final decommissioning and disposal of the heating system ............... 40
10. Keyword index .................................................................................................................. 41
Index
Index (cont.)
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Symbol Meaning
Reference to other document containing
further information
1.
Step in a diagram:
The numbers correspond to the order in
which the steps are carried out.
Warning of material losses and environ-
mental pollution
Live electrical area
Pay particular attention.
■Component must audibly click into place.
or
■Acoustic signal
■Fit new component.
or
■In conjunction with a tool: Clean the sur-
face.
Dispose of component correctly.
Dispose of component at a suitable collec-
tion point. Do not dispose of component in
domestic waste.
Terminology
To provide you with a better understanding of the func-
tions of your Vitotrol control unit, some terminology is
explained.
In the operating instructions these points are identified
as follows:
Further information can be found in chapter
"Terminology" in the appendix.
Intended use
The appliance is only intended to be installed and
operated in sealed unvented heating systems that
comply with EN 12828, with due attention paid to the
associated installation, service and operating instruc-
tions.
Depending on the version, the appliance can only be
used for the following purposes:
■Central heating
■DHW heating
The range of functions can be extended with additional
components and accessories.
Introductory information
Symbols
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Intended use presupposes that a fixed installation in
conjunction with permissible, system-specific compo-
nents has been carried out.
Commercial or industrial usage for a purpose other
than central heating or DHW heating shall be deemed
inappropriate.
Any usage beyond this must be approved by the man-
ufacturer in each individual case.
Incorrect usage or operation of the appliance (e.g. the
appliance being opened by the system user) is prohibi-
ted and will result in an exclusion of liability. Incorrect
usage also occurs if the components in the heating
system are modified from their intended function.
Note
This appliance is intended exclusively for domestic
use. Untrained persons can also operate this appli-
ance safely.
Commissioning
Your heating contractor must carry out the commis-
sioning and matching of the control unit to local and
structural conditions and must also provide training in
system operation.
The Vitotrol 350 can control up to 20 different circuits.
At the factory these circuits are each designated as a
"Regulated circuit". We recommend you rename
these circuits during commissioning to suit local condi-
tions.
Note
These operating instructions also describe functions
that are only available for certain boilers or together
with accessories. These functions are not specifically
identified.
Check with your heating contractor should you have
any questions relating to the available range of func-
tions and accessories for both your boiler and your
heating system.
Permissible ambient temperature
Incorrect ambient conditions can result in damage to
the control unit and put safe operation at risk.
Observe the installation and service instructions
of the control unit.
Permissible ambient temperature for the Vitotrol 350:
■Storage: -25 °C to 60 °C
■Operation: 0 °C to 40 °C
Energy saving tips
Use the adjustment options offered by your boiler con-
trol unit:
■For central heating, select the operating program
that meets your current requirements:
–For brief periods of absence (a few hours shopping
for example), select "Economy mode".
As long as economy mode is activated, the room
temperature is reduced.
–If you are away for longer periods, select "Holiday
program".
Central heating will be automatically switched off
for as long as the holiday program remains active.
–If you have no need to heat your home or provide
DHW for longer periods of time, switch off heating
mode for the respective heating circuits as well as
DHW mode.
■Never set the temperature inside the DHW cylinder
too high.
Introductory information
Intended use (cont.)
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Central heating
■Standard room temperature ("Set room tempera-
ture")
In the standard menu you can set your particular
feel-good temperature at any time.
■Preferred heating circuit
If your heating system comprises several heating cir-
cuits, you can make the most important settings for a
preferred heating circuit in the standard menu.
■Time program
Make use of the time program. In the time program
you can set time phases with different room temper-
atures, for example different for the day than for the
night.
■Heating curve
The heating curve enables you to individually adjust
the heating system to the actual heat demand in your
home. If set correctly, your feel-good temperature will
be achieved all year round.
■"Party mode"
Select "Party mode" if you want to heat your home
to a temperature that is different from that dictated by
the time program.
Example: Late in the evening, the reduced room
temperature is set by the time program. If your visi-
tors stay a little longer, you can change over to a
higher temperature.
DHW heating
■Time program
Use the time program for DHW heating.
Introductory information
Tips for greater comfort
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Programming unit default display
Menü
14° 20.5°
Soll: 21.0°
Heizung EG Wohnraum 21.05.2014
13:42
A
N
B C
D
F
K
G
LM H
E
Fig.1
ACalling up the menu
BSet regulated circuit
CDate & time
DHeader
ESet room temperature
FButtons for temperature corrections
GFooter
HCurrent room temperature
KFault message
LCurrent outside temperature
MDisplay, such as central heating with standard
room temperature
NButtons for operating program
Bright background = active operating program
The Vitotrol 350 programming unit is equipped with a
touch sensitive display. To make adjustments and scan
information, tap the on-screen buttons.
Symbols in the display
Symbols are not permanently displayed but appear
according to system version and operating state.
Buttons:
+Raises the temperature.
–Lowers the temperature.
"Menu" Calls up the menu.
"Regulated circuit 1" Selects the required group.
"Heating circuit 1" Selects the required group.
"OK" Confirms your selection or set-
ting.
Returns to the default display.
Moves to the previous step in
the menu or cancels a setting
that has been started.
/ / / Scrolls through the menu or
adjusts values.
Indicators:
Boiler and DHW cylinder frost protection monitoring
Central heating with standard room temperature
Central heating with reduced room temperature
In conjunction with a solar thermal system:
Solar circuit pump running
Messages:
Fault message
Screensaver
The screensaver will be enabled if no adjustments are
made on the programming unit for a few minutes. The
display brightness is reduced.
Operation
Controls and symbols
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Screensaver
08:37
-3° 23.4°C
Wednesday
21/05/2014
Thursday Friday
Fig.2
The following will be displayed:
■Date
■Time
■Outside temperature
■Default display heating circuit room temperature
Tap the display to reach the default display (see
page 9).
User prompts
Settings made via the default display
Menu
14° 20.5°
Set: 21.0°
Central heating GF living room 21/05/2014
13:42
Fig.3
At the default display, you can make and scan the following settings for the set regulated circuit:
■Heating mode
"Heating mode is ON"/"Heating mode is OFF"
■Energy saving function
"Economy mode is ON"/"Economy mode is OFF"
■Comfort function
"Party mode": You can set the temperature for party mode.
See chapter "Setting the operating program", page 13
Tap .
Heating is ON when the operating program has a bright background.
Note
and will only be shown when heating is ON.
Settings made via the menu
Note
Subject to the features of your heating system, not all of the information listed here may be available to scan.
On the default display tap "Menu". You can make and scan the following settings:
Operation
Controls and symbols (cont.)
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Menu
Heating
Boiler operation DHW
Information Settings
Manual
Fig.4
Menu
Local htg. ntwrk suppl.
Fig.5
■"Boiler operation" see page 24
■"Heating" see page 12
■"DHW" see page 21
■"Local heating network supply" see page 29
■"Manual"
■"Information" see page 35
■"Settings" see page 31
Operation
User prompts (cont.)
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If you require central heating, check the following
points:
■Have you selected the heating circuit?
For settings see chapter "Selecting the heating cir-
cuit".
■Have you set the required room temperature?
■Have you selected the correct operating program?
■Have you selected the required time program?
Selecting the heating circuit
Heating can, if necessary, be split over several heating
circuits.
■In the case of heating systems with several heating
circuits, for all central heating settings, first select the
heating circuit where you want to make a change.
■This selection is not possible in heating systems with
only one heating circuit.
If you or your heating contractor have renamed the
heating circuits (to "Flat" for example), that name will
be shown in place of "Heating circuit 1".
Setting central heating temperatures
Setting the room temperature for standard heating mode
Default display
1. "Menu"
2. "Heating"
3. Select the required heating circuit.
Heating zone regulated circuit 1
Reduced
room temperature
Op mode Time program
Heating
Holiday program
Set temperature
day
Temperature level
Diagram
Fig.6
4. "Set temperature, day"
Set temperature, day
21.0°
OK
Fig.7
5. +/- for the required temperature
6. Press "OK" to confirm
Setting the room temperature for reduced heating mode (night setback)
Default display
1. "Menu"
2. "Heating"
3. Select the required heating circuit.
4. "Reduced room temperature"
Reduced room temperature
19.0°
OK
Fig.8
Central heating
Central heating settings
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5. +/- for the required temperature
6. Press "OK" to confirm
Operating program
Further information can be found in chapter
"Terminology" in the appendix.
Setting the operating program
Default display
1. "Menu"
2. "Heating"
3. Select the required heating circuit.
4. "Op mode"
Op mode heating zone, roof space
Heating mode Economy mode Party mode
Fig.9
5. Select the required operating program:
■è for heating mode
■â for economy mode
■Þ for party mode
An operating program with a bright background is
already enabled.
Note
and will only be shown when heating is ON.
Note
Tapping
è
again shuts down heating mode.
Time program
Further information can be found in chapter
"Terminology" in the appendix.
Setting a time program
The time when the heating circuit delivers central heat-
ing with standard or reduced room temperature is
dependent on the settings of the switching times for
the relevant day (4 possible time phases).
■If one or more time phases are selected, central
heating with standard room temperature will be
active for those times.
■If no time phases are selected, central heating will be
enabled for the whole day with reduced room tem-
perature.
Central heating
Setting central heating temperatures (cont.)
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■For central heating, up to 4 changes per day
between standard and reduced room temperature
can be programmed (4 time phases).
■For weekdays, time phase ! has been factory-set
from 06:00 to 22:00 h. During this time your home
will be heated to the standard room temperature.
■You can set switching times for each weekday indi-
vidually.
When setting switching times, note that your heating
system requires some time to heat rooms to the
required temperature.
Note
The relevant heating circuit is controlled with reference
to the standard room temperature set during the speci-
fied switching times.
Setting switching times
Default display
1. "Menu"
2. "Heating"
3. Select the required heating circuit.
4. "Heating time program"
OK
00:00
12:00
24:00
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Heating prog, central heating
Fig.10
5. Select any day.
4
3
2
1
OK
00:00
12:00
24:00 from to
from to
from00:00 to 00:00
from06:00 to 22:00
Heating prog phase setting for Monday
00:00 00:00
00:00 00:00
Fig.11
6. Select the time phase you want to change.
OK
00:00
12:00
24:00
0 22 0: :
tofrom
Phase 1 heating prog for Monday
6
Fig.12
7. Set the required switching times.
8. Press "OK" to confirm
9. Set further time phases or tap "OK" to confirm.
OK
Mo
Tu
We
Th
Fr
Sa
Su
Heating prog for Monday
Fig.13
10. Select the days of the week when the new switch-
ing times should apply.
11. Press "OK" to confirm
Note
The switching times will be accepted exclusively
for those days which have been checked.
Comfort function "Party mode"
Setting "Party mode"
Note
You can set party mode directly for the regulated cir-
cuit set in the default display.
Default display
1. "Menu"
2. "Heating"
3. Select the required regulated circuit.
Central heating
Time program (cont.)
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4. "Op mode"
An operating program with a bright background is
already enabled.
5. If "Party mode" is disabled, tap "Party mode".
Note
Heating mode must be switched on in order to
display "Party mode" for selection.
6. Set the required room temperature for "Party
mode".
7. Press "OK" to confirm
Terminating "Party mode"
■Party mode terminates automatically after 8 hours.
or
■Party mode terminates automatically on changeover
to the "Standard" operating status in accordance
with the time program.
or
Default display
1. "Menu"
2. "Heating"
3. Select the required regulated circuit.
4. "Op mode"
An operating program with a bright background is
already enabled.
5. If "Party mode" is enabled, tap "Party mode".
Energy saving function "Economy mode"
Setting "Economy mode"
Default display
1. "Menu"
2. "Heating"
3. Select the required regulated circuit.
4. "Op mode"
An operating program with a bright background is
already enabled.
5. If "Economy mode" is disabled, tap "Economy
mode".
Note
Heating mode must be switched on in order to
display "Economy mode" for selection.
6. "OK" to confirm or wait a few seconds.
Terminating "Economy mode"
■Economy mode terminates automatically on change-
over to the "Reduced" operating status in accord-
ance with the time program.
or
Default display
1. "Menu"
2. "Heating"
3. Select the required regulated circuit.
4. "Op mode"
An operating program with a bright background is
already enabled.
5. If "Economy mode" is enabled, tap "Economy
mode".
6. "OK" to confirm or wait a few seconds.
Energy saving function "Holiday program"
Setting "Holiday program"
The holiday program starts at 00:00 h the day after the
departure date. The holiday program ends at 00:00 h
on the return date. The set time program will be ena-
bled on the day of departure and the day of return.
Default display
1. "Menu"
2. "Heating"
3. Select the required regulated circuit.
4. "Holiday program"
Central heating
Comfort function "Party mode" (cont.)
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5. Set the required departure and return dates.
OK
. . . .5 2014 21 2014tofrom
Holiday program
521
Fig.14
6. Press "OK" to confirm
The holiday program has the following effect:
Rooms are heated to the set reduced room tempera-
ture (see page 12).
Terminating the "Holiday program"
Default display
1. "Menu"
2. "Heating"
3. Select the required regulated circuit.
4. "Holiday program"
5. "End holiday program"
6. Press "OK" to confirm
Heating curve
■You can alter the heating characteristics if the room temperature does not meet your requirements for any pro-
longed period of time.
■Please observe the modified heating characteristics over several days (if possible, wait for a major change in
the weather) before making further adjustments.
You can adjust the heating curve in 3 different ways:
■via the questionnaire
■via standard mode
■via contractor mode
Setting the heating curve via the questionnaire
Default display
1. "Menu"
2. "Heating"
3. Select the required heating circuit.
4. "Temperature level diagram"
Temperature level curve setting
Temperature level
Diagram
Temperature level
Questionnaire
?
Setting the temperature level
via diagram
Setting the temperature level
via questionnaire
Fig.15
Central heating
Energy saving function "Holiday program" (cont.)
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5. "Temp level questionnaire"
Temp level questionnaire Adjusting sensitivity
-10°C
0°C
+10°C
too
cold OK too hot
too
cold OK too hot
too
cold OK too hot
How do you perceive
the room temp
when the outside temp
is...?
Fig.16
6. Make the required corrections.
7. Press "OK" to confirm
Note
Your input automatically changes the heating curve.
Setting the heating curve via standard mode
Default display
1. "Menu"
2. "Heating"
3. Select the required heating circuit.
4. "Temperature level diagram"
Temperature level curve setting
Temperature level
Diagram
Temperature level
Questionnaire
?
Setting the temperature level
via diagram
Setting the temperature level
via questionnaire
Fig.17
5. "Temperature level diagram"
Temperature level diagram
Contractor
mode OK
°C -10° 0° 10°
At an outside temp of ...
Flow temperature curve setting
Fig.18
Central heating
Heating curve (cont.)
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6. Tap the required temperature button.
Temperature level diagram
Flow temperature curve setting
Contractor
mode
×
°C -10° 0° 10°
Temperature
level
At an outside temp of ...
OK
Fig.19
7. Correct the temperature with the +/- buttons.
8. Press "OK" to confirm
Setting the heating curve via contractor mode
Default display
1. "Menu"
2. "Heating"
3. Select the required heating circuit.
4. "Temperature level diagram"
Temperature level curve setting
Temperature level
Diagram
Temperature level
Questionnaire
?
Setting the temperature level
via diagram
Setting the temperature level
via questionnaire
Fig.20
5. "Temperature level diagram"
Temperature level diagram
Contractor
mode OK
°C -10° 0° 10°
At an outside temp of ...
Flow temperature curve setting
Fig.21
6. "Contractor mode"
Central heating
Heating curve (cont.)
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7. Tap the "Slope" or "Level" buttons.
Temperature level diagram
Standard
values
Standard
mode OK
°C
At an outside temp of ...
-30° -20° -10° 0° 10° 20°
70° 57° 48° 40° 30° 25° +
-
1.0 0
Flow temperature curve setting Slope Level
Fig.22
8. Correct the values with the +/- buttons.
9. Press "OK" to confirm
■You influence the heating characteristics by changing the slope or level of the heating curve.
Changing slope and level
Please use the following table as an aid to making adjustments:
Heating characteristics Measures Example
The living space is too cold during the
heating season.
Set the heating curve slope to the next
higher value (e.g. 1.5).
Slope 1.5
Level 0 K
The living space is too hot during the
heating season.
Set the heating curve slope to the next
lower value (e.g. 1.3).
Slope 1.3
Level 0 K
The living space is too cold during spring/
autumn and during the heating season.
Set the heating curve level to the next
higher value (e.g. +3).
Slope 1.4
Level 3 K
The living space is too hot during spring/
autumn and during the heating season.
Set the heating curve level to the next
lower value (e.g. −3).
Slope 1.4
Level -3 K
The living space is too cold during spring/
autumn, but warm enough during the heat-
ing season.
Set the heating curve slope to the next
lower value and the level to a higher val-
ue.
Slope 1.3
Level 3 K
The living space is too hot during spring/
autumn, but warm enough during the heat-
ing season.
Set the heating curve slope to the next
higher value and the level to a lower val-
ue.
Slope 1.5
Level -3 K
Note
Setting the heating curve slope or level too high or too low will not result in damage to your heating system.
For technically-minded system users
■Heating curves illustrate the relationship between the outside temperature and the flow temperature. To put it
simply: The lower the outside temperature, the higher the flow temperature.
The illustrated heating curves apply with the following settings:
Central heating
Heating curve (cont.)
5677 786 GB

20
■Heating curve level = 0
Different level settings shift the curve in parallel in a vertical direction.
■Standard room temperature = approx. 20 °C
In the delivered condition, the control unit has been programmed as follows:
■Slope = 1.4
■Level = 0
0.2
Outside temperature in °C
Boiler water or flow temperature in °C
Slope
2.4 2.6 2.8 3.0 3.2 3.4
90
80
70
60
50
40
30
0 -10 -2010
A
B
2.0 2.2
Set room temperature in °C
35 30 25 20 15 10 5
0.4
0.6
0.8
1.0
1.2
1.4
-30
1.8 1.6
C
-14
Fig.23
Example for an outside temperature of -14 °C:
AUnderfloor heating system, slope 0.2 to 0.8
BLow temperature heating system, slope 0.8 to 1.6
CHeating system with a boiler water temperature in excess of 75 °C, slope 1.6 to 2.0
Central heating
Heating curve (cont.)
5677 786 GB