Viessmann OpenTherm Operating Instructions Manual
Operating instructions
for the system user
OpenTherm room temperature controller with digital time switch
For Vitodens 100-W, 111-W and 050-W
VIESMANN
Room temperature controller
5837779 GB 12/2018
Please keep safe.
Safety instructions
For your safety
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.
Target group
These operating instructions are
designed 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 individuals are being
supervised or have been instructed in
the safe use of this appliance and any
risks arising from it.
Connecting the appliance
■ Connection and commissioning of the
appliance may only be carried out by
authorised contractors.
■ Only operate the appliance with suitable fuels.
■ Adhere to the electrical connection
requirements.
■ Modifications to the existing installation may only be carried out by
authorised contractors.
Note
Details identified by the word "Note"
contain additional information.
Please note
Supervise children in the prox-
!
imity of the appliance.
■ Never permit children to play
with the appliance.
■ Cleaning and maintenance
must not be carried out by
unsupervised children.
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.
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2
Safety instructions
For your safety
Working on the appliance
■ When adjusting settings and carrying
out work on the appliance always follow the guidelines in these operating
instructions.
Additional work on the appliance may
only be carried out by authorised
contractors.
■ Never open the appliance.
■ Never remove the cladding.
Damage to the appliance
Danger
Damaged equipment poses a
safety hazard.
If you smell gas
Danger
Escaping gas can lead to explosions which may result in serious injury.
■ Do not smoke. Prevent naked
flames and sparks. Do not
switch lights or electrical appliances on or off.
■ Close the gas shut-off valve.
■ Open windows and doors.
(cont.)
■ Never remove or change additional
parts or installed 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.
Check the appliance for external
damage. Never start up a damaged appliance.
■ 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).
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Safety instructions
For your safety
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.
What to do if water escapes from the appliance
(cont.)
Emergency contact
If you smell gas or detect a gas leak
call the National Gas Emergency service on 0800 111 999. Notify your gas or
electricity supplier and your heating
contractor.
■ Shut off the electricity supply to the
building from a safe place (outside
the building).
■ Shut down the heating system.
■ Close the shut-off valves in
the fuel supply lines.
■ Use a tested fire extinguisher,
class ABC.
Danger
If water escapes from the appliance there is a risk of electrocution.
What to do if the heating system develops a fault
Danger
Fault messages indicate faults
in the heating system. If faults
are not rectified, they can have
life threatening consequences.
4
■ Switch OFF the heating system at the external isolator
(e.g. fuse box, domestic distribution board).
■ Notify heating contractor.
Do not acknowledge fault messages several times in quick
succession. Inform your heating
contractor so the cause can be
analysed and the fault rectified.
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Safety instructions
For your safety
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.
Do not 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. petrol, solvents,
cleaning agents, paints or
paper) can cause deflagration
and fire.
Never store or use such materials in the boiler room or in direct
proximity to the heating system.
(cont.)
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,
solvents 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 outside (cooker hoods, extractors, air conditioning units, etc.) can
create negative pressure. If the boiler is
operated at the same time, this can
lead to reverse flow of the flue gas.
5837779
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 supply of combustion
air. If necessary, contact your
contractor.
5
Safety instructions
For your safety
Auxiliary components, spare and wearing parts
Please note
Components not tested with the
!
heating system may damage the
system or affect its function.
(cont.)
Only allow qualified contractors
to carry out installation or
replacement work.
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Index
Index
Information
Symbols................................................................................................................ 9
Intended use......................................................................................................... 10
Introductory information
Control unit function modes.................................................................................. 11
Where to find the controls
Summary of controls and indicators..................................................................... 12
■ Controls and display elements.......................................................................... 12
■ Symbols on the display..................................................................................... 13
Commissioning
Heating system operating mode........................................................................... 15
Time program or operating mode......................................................................... 16
■ Selecting the time program or operating mode................................................. 16
■ Preset time programs........................................................................................ 16
■ Constant operating modes................................................................................ 17
■ Changing the selected time program and set temperatures............................. 18
Central heating
Selecting the operating mode............................................................................... 20
Temporarily changing the room temperature........................................................ 20
■ Temporarily changing the set room temperature.............................................. 20
■ Comfort mode................................................................................................... 20
■ Reduced mode.................................................................................................. 21
Permanently changing the room temperature...................................................... 21
■ Changing the heating curve for weather-compensated operation.................... 22
Changing the room temperature for a few days (holiday mode).......................... 24
■ Stopping or interrupting the holiday program.................................................... 25
DHW heating
Setting the time program and DHW temperature................................................. 26
■ Changing or deleting switching times............................................................... 26
■ Temporarily changing the DHW temperature.................................................... 26
Further adjustments
Time and date...................................................................................................... 27
Summer/wintertime.............................................................................................. 27
Further settings.................................................................................................... 27
Setting the language............................................................................................ 28
Changing the default display................................................................................ 28
Setting the contrast.............................................................................................. 29
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Index
(cont.)
Index
Locking out controls (key lock)............................................................................. 29
■ Temporarily interrupting or unlocking key lock.................................................. 29
Changing the display format of fault messages................................................... 29
Returning all settings to their delivered condition................................................. 29
Checks
Checking information............................................................................................ 30
What to do if...
Rooms are too cold.............................................................................................. 31
Rooms are too hot................................................................................................ 31
Carrying out a reset.............................................................................................. 32
Maintenance
Cleaning............................................................................................................... 33
Appendix
Menu structure in setting mode (MODE).............................................................. 34
Menu structure in settings.................................................................................... 34
Keyword index.................................................................................................... 36
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1.
Symbols
Information
Symbol
Meaning
Reference to other document
containing further information
Step in a diagram:
The numbers correspond to
the order in which the steps
are carried out.
Warning of material losses and
environmental 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 surface.
Dispose of component correctly.
Dispose of component at a
suitable collection point. Do
not dispose of component in
domestic waste.
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Information
Intended use
The appliance is intended solely for
installation and operation in sealed
unvented heating systems that comply
with EN 12828, with due attention paid
to the associated installation, service
and operating instructions. It is only
designed for heating up heating water
that is of potable water quality.
Intended use presupposes that a fixed
installation in conjunction with permissible, system-specific components has
been carried out.
Commercial or industrial usage for a
purpose other than heating the building
or DHW shall be deemed inappropriate.
Any usage beyond this must be
approved by the manufacturer in each
individual case.
Incorrect usage or operation of the
appliance (e.g. the appliance being
opened by the system user) is prohibited and will result in an exclusion of liability. Incorrect usage also occurs if the
components in the heating system are
modified from their intended use (e.g. if
the flue gas and ventilation air paths
are sealed).
10
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Control unit function modes
Introductory information
Your heating contractor set the function
mode during commissioning.
Two function modes are possible:
■ Room temperature-dependent operation: If no outside temperature sensor
and no heating circuit with mixer is
connected, function mode "ROOM-
CONTROL" must be selected.
■ Weather-compensated operation: If
an outside temperature sensor and a
heating circuit with mixer are connected, function mode "OT CONTROL"
must be selected.
The settings you can make vary
depending on the function mode selected.
Note
DHW heating is active continuously or
in accordance with the set switching
times, regardless of the function mode
set.
Function mode set by the heating
contractor
"ROOM-CONTROL" (room tem-
=
perature-dependent operation)
"OT CONTROL" (weather-com-
=
pensated operation)
Note
You will have to select the function
mode again following a reset.
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08:26
21 3
A B
D C
ROOM TEMP
MODE PARTY ECO INFO
°
c
Where to find the controls
Summary of controls and indicators
Controls and display elements
Display
A
Rotary selector for changing the
B
temperature/value
12
Keys
C
Reset (see page 32)
D
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