Viessmann VITODENS 050-W User manual

Operating instructions
for the system user
VIESMANN
With constant temperature or weather-compensated control unit
VITODENS 050-W
5513 086 GB 9/2014 Please keep safe.

2
Please follow these safety instructions closely to prevent accidents and mate-
rial 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 envi-
ronmental pollution.
Note
Details identified by the word "Note" con-
tain additional information.
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, sen-
sory 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.
!Please note
Supervise children in the proxim-
ity of the appliance.
■ Never permit children to play
with the appliance.
■ Cleaning and maintenance
must not be carried out by
unsupervised children.
Connecting the appliance
■ Connection and commissioning of the
appliance may only be carried out by
authorised contractors.
■ Only operate the appliance with suita-
ble fuels.
■ Adhere to the electrical connection
requirements.
■ Modifications to the existing installa-
tion may only be carried out by author-
ised 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 regis-
tered gas fitter.
■ Work on electrical equipment
must only be carried out by a
qualified electrician.
Working on the appliance
■ When adjusting settings and carrying
out work on the appliance always fol-
low the guidelines in these operating
instructions.
Additional work on the appliance may
only be carried out by authorised con-
tractors.
■ Never open the appliance.
■ Never remove the cladding.
■ Never remove or change additional
parts or installed accessories.
■ Never open or retighten pipe connec-
tions.
Safety instructions
For your safety
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Danger
Hot surfaces can cause burns.
■ Never open the appliance.
■ Never touch the hot surfaces of
uninsulated pipes, fittings or
flue pipes.
If you smell gas
Danger
Escaping gas can lead to explo-
sions which may result in serious
injury.
■ Do not smoke. Prevent naked
flames and sparks. Do not
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 sup-
ply 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 threat-
ening poisoning.
■ Shut down the heating system.
■ Ventilate the installation site.
■ Close all doors in the living
space.
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 elec-
tricity supplier and your heating contrac-
tor.
■ Shut off the electricity supply to the
building from a safe place (outside the
building).
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.
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.
Do not acknowledge fault mes-
sages several times in quick suc-
cession. Inform your heating con-
tractor so the cause can be ana-
lysed and the fault rectified.
Safety instructions
For your safety (cont.)
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Installation room requirements
Danger
Sealed vents result in a lack of
combustion air. This leads to
incomplete combustion and the
formation of life threatening car-
bon 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/pipe-
work routing, cladding or parti-
tions).
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 installation 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,
solvents or cleaning fluids) and
excessive dust (e.g. through
grinding/polishing work).
■ Avoid continuously high humid-
ity levels (e.g. through continu-
ous drying of washing).
Extractors
The operation of appliances that extract
air to the outside (cooker hoods, extrac-
tors, air conditioning units, etc.) can cre-
ate negative pressure. If the boiler is
operated at the same time, this can lead
to 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 poison-
ing due to reverse flow of the flue
gas.
Take suitable steps to ensure an
adequate supply 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.
Only allow qualified contractors
to carry out installation or
replacement work.
Safety instructions
For your safety (cont.)
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Introductory information
Commissioning..................................................................................................... 7
Intended use......................................................................................................... 7
Terminology.......................................................................................................... 7
Your system is preset at the factory..................................................................... 8
Energy saving tips................................................................................................ 8
Where to find the controls
Summary of controls and indicators..................................................................... 9
■Display and control elements............................................................................ 9
■Symbols on the display..................................................................................... 10
■ Operation.......................................................................................................... 10
Operating mode of the heating system................................................................ 10
■ Operation without room temperature controller................................................ 10
■ Operation with room temperature controller..................................................... 11
■ Weather-compensated mode............................................................................ 11
Start-up/shutdown
Starting the heating system.................................................................................. 12
Shutting down the heating system....................................................................... 13
Shutting down central heating and DHW heating................................................. 14
■ Shutting down central heating........................................................................... 14
■ Stopping DHW heating..................................................................................... 14
Adjusting the room temperature
Setting the central heating temperature............................................................... 15
■ Operation without room temperature controller ― Setting the heating water
temperature....................................................................................................... 15
■ Operation with room temperature controller ― Setting the boiler water tem-
perature............................................................................................................. 15
■ Weather-compensated operation ― setting the room temperature.................. 16
Setting the DHW temperature
DHW temperature................................................................................................ 17
Emissions test mode
Starting emissions test mode (to be used by a competent person only).............. 18
■ Ending emissions test mode............................................................................. 18
What to do if...
Rooms are too cold.............................................................................................. 19
Rooms are too hot................................................................................................ 19
There is no hot water............................................................................................ 20
Index
Index
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The DHW is too hot.............................................................................................. 20
Upkeep
Cleaning............................................................................................................... 21
Inspection and maintenance................................................................................ 21
Boiler.................................................................................................................... 21
Power cable.......................................................................................................... 21
Appendix
Terminology.......................................................................................................... 22
Keyword index.................................................................................................... 23
Index
Index (cont.)
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The commissioning and matching up of
the control unit to local conditions and
the structural characteristics of the build-
ing must be carried out by your heating
contractor.
Intended use
The appliance is only intended to be
installed and operated in sealed unven-
ted heating systems that comply with
EN 12828, with due attention paid to the
associated installation, service and
operating instructions. It is only designed
for the heating of water that is of potable
water quality.
Intended use presupposes that a fixed
installation in conjunction with permissi-
ble, system-specific components has
been carried out.
Commercial or industrial usage for a pur-
pose 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 appli-
ance (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).
Terminology
To provide you with a better understand-
ing of the functions of your Viessmann
control unit, some terminology is
explained.
The terms are marked as follows:
Further information can be found
in chapter "Terminology" in the ap-
pendix.
Introductory information
Commissioning
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Your heating system is preset at the fac-
tory and is therefore ready for operation.
DHW and central heating are enabled.
Your heating contractor can make fur-
ther adjustments for you during commis-
sioning.
You can change these settings at any
time to suit your individual require-
ments.
Power failure
All settings are saved if there is a power
failure.
Energy saving tips
Central heating
■Room temperature:
Never overheat your rooms. Every
degree of room temperature reduction
saves up to 6 % on your heating bills.
If possible, set your room temperature
no higher than 20 °C (see page 15).
■Ventilation:
For venting/airing, open the windows
fully for a brief time. During this time,
close the thermostatic valves (if no
mechanical ventilation system is
installed).
■Roller shutters:
Close roller shutters (where installed)
at dusk.
■Thermostatic valves:
Ensure that thermostatic valves are
properly adjusted.
■Radiators:
Never cover radiators or thermostatic
valves.
DHW heating
■DHW temperature:
Never set the DHW temperature too
high (see page 17).
■Hot water consumption:
Consider showering instead of running
a bath. A shower generally uses less
energy than a full bath.
Introductory information
Your system is preset at the factory
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Display and control elements
You can change any settings on your
heating system centrally at the control
unit.
Note
If your system is equipped with a room
temperature controller, you can use it to
set the room temperature (see separate
operating instructions)..
All thermostatic radiator valves must be
fully open in the room where the room
temperature controller is installed.
bar
1
0
23
4
DCBA
ADisplay
BKeys (see page 10)
CON/OFF switch
DPressure gauge
Where to find the controls
Summary of controls and indicators
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Symbols on the display
°C
°F
SERV
A
BCD
E
F
G
H
ADHW heating
BHeating mode
CDisplay value or fault code
DTemperature displayed in °C or °F
EFault display
FService mode
GCurrent burner output
HBurner operation
Operation
A B C
ASelecting/terminating functions
BChanging or selecting values
CAccepting values/confirming selec-
tion
Operating mode of the heating system
Operation without room temperature controller
Further information can be found
in chapter "Terminology" in the ap-
pendix.
Setting the required heating water tem-
perature, see page. 15.
Where to find the controls
Summary of controls and indicators (cont.)
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Operation with room temperature controller
Further information can be found
in chapter "Terminology" in the ap-
pendix.
Make any settings on the connected
room temperature controller using the
relevant operating instructions.
Note
Set the boiler water temperature set high
enough in order to achieve the required
room temperature.
For settings, see page 15.
Weather-compensated mode
Further information can be found
in chapter "Terminology" in the ap-
pendix.
The boiler water temperature is regula-
ted in accordance with a defaulted heat-
ing curve and the prevailing outside tem-
perature.
For setting the room temperature, see
page 16.
Note
Connect a room temperature controller
to your heating system to prevent gen-
erating heat unnecessarily at times when
you do not require central heating. This
enables central heating to be suspended
at night, for example, in order to save
energy.
Where to find the controls
Operating mode of the heating system (cont.)
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We recommend you contact your heat-
ing contractor if you are planning to take
your heating system out of use for long
periods.
bar
1
0
23
4
AB C
1. Check the heating system pressure
at pressure gauge A:
The system pressure is too low if the
indicator points to the area below
0.8 bar(80 kPa). In this case, top up
with water or notify your local heating
contractor. When topping up the sys-
tem with water the pressure (cold)
should not exceed 1.5 bar.
2. Open gas shut-off valve C.
3. Switch ON the power supply, e.g. at
a separate MCB/fuse or a mains iso-
lator.
4. Switch ON/OFF switch B ON.
The control unit carries out a self test
after being switched ON.
Your heating system and room tem-
perature controller (if installed) are
now ready for operation.
°C
Note
Boiler frost protection is enabled.
Start-up/shutdown
Starting the heating system
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!Please note
Frost protection is only
ensured for as long as the
power supply is stable.
Switch ON the power supply
(MCB/fuse, mains isolator)
and the control unit ON/OFF
switch.
Shutting down the heating system
■ If you do not intend using your heating
system for a while, such as during a
summer holiday, switch off central
heating and DHW heating (see page
14).
■ You can switch your heating system
OFF at the ON/OFF switch if you do
not intend using it.
We recommend you contact your
heating contractor if you are planning
to take your heating system out of use
for long periods.
Your heating contractor can then take
suitable steps such as frost protection
for the system or heating surface pres-
ervation as required.
Shutting down the heating system
1. Switch ON/OFF switch B OFF.
The display goes blank.
2. Close gas shut-off valve C.
Note
The system is no longer protected
against frost.
All control unit settings are retained.
Start-up/shutdown
Starting the heating system (cont.)
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Shutting down central heating
You do not want to heat your interior but
you want to have DHW available (sum-
mer mode).
Press the following keys:
1. the set boiler water temperature
flashes and will be displayed.
2. until "OFF" is displayed.
°C
3. OK to confirm.
Note
■ The circulation pump briefly starts
every 24 hours to prevent it from seiz-
ing up.
■ Boiler frost protection is enabled.
Stopping DHW heating
You do not want to have DHW availa-
ble
Press the following keys:
1. MODE
2. / until flashes.
3. OK to confirm.
The set DHW temperature
flashes.
4. until "OFF" is displayed.
°C
5. OK to confirm.
Start-up/shutdown
Shutting down central heating and DHW heating
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Operation without room temperature controller ― Setting the
heating water temperature
If no outside temperature sensor and no
room temperature controller is connec-
ted.
The room temperature is influenced by
the heating water temperature. In the
delivered condition, the heating water
temperature is set to 70 °C.
Press the following keys:
1. / the set heating water tempera-
ture flashes and will be dis-
played.
2. / until the required heating water
temperature is displayed.
°C
3. OK to confirm.
Operation with room temperature controller ― Setting the boiler
water temperature
If no outside temperature sensor is con-
nected, but a room temperature control-
ler is.
Set the boiler water temperature high
enough if the required room temperature
cannot be achieved. In the delivered
condition, the boiler water temperature is
set to 70 °C.
Press the following keys:
1. / the set boiler water temperature
flashes and will be dis-
played.
2. / until the required boiler water
temperature is displayed.
°C
3. OK to confirm.
Adjusting the room temperature
Setting the central heating temperature
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Weather-compensated operation ― setting the room tempera-
ture
An outside temperature sensor must be
connected for weather-compensated
operation.
In the delivered condition, a parameter
value of 20 is set for central heating.
Should you wish to set a higher room
temperature, increase the parameter
value; reduce it for a lower room temper-
ature.
Press the following keys:
1. / the set parameter flashes and
will be displayed.
2. / until the required room temper-
ature is achieved.
Note
When adjusting this setting,
bear in mind that your heating
system requires some time to
heat the interior to the required
temperature.
3. OK to confirm.
Adjusting the room temperature
Setting the central heating temperature (cont.)
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Press the following keys:
1. MODE
2. / until flashes.
3. OK to confirm.
The set DHW temperature
flashes.
4. / to set the required DHW
temperature.
°C
5. OK to confirm.
Setting the DHW temperature
DHW temperature
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Emissions test mode should only be acti-
vated by your flue gas inspector during
the annual inspection.
Various output stages can be set for
checking the flue gas.
Press the following keys:
1. MODE
2. / until "SERV" flashes.
3. OK to confirm.
"OFF" flashes (test mode
disabled).
4. / to set the required burner
output.
Display
Display
Burner
output
_ 20 20 %
_ _ 40 40 %
_ _ _ 60 60 %
_ _ _ _ 80 80 %
_ _ _ _ _ 100 100 %
5. OK to confirm.
Test mode enabled.
Ending emissions test mode
Note
This function will also terminate auto-
matically after 30 minutes.
Press the following keys:
1. MODE
2. / until "SERV" flashes.
3. OK to confirm. The value set last
flashes.
4. until "OFF"flashes.
5. OK to confirm.
Test mode is now disabled.
Emissions test mode
Starting emissions test mode (to be used by a competent person only)
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Cause Remedy
Room temperature controller incorrectly
set.
Set the required room temperature at the
room temperature controller.
The heating system is switched off. ■ Switch the ON/OFF switch ON.
■ Switch the mains isolator ON (if instal-
led).
■ Check the MCB/fuse in the power dis-
tribution board (main domestic MCB/
fuse).
Control unit incorrectly set. ■ Operation with room temperature con-
troller:
Set a higher boiler water temperature
(see page 15).
■ Weather-compensated operation:
Set a higher room temperature (see
page 16).
Symbol flashes and a fault code (e.g.
F2) will be displayed.
Notify your local heating contractor.
The indication disappears when the fault
has been removed.
No fuel. Open the gas shut-off valve.
■ If necessary, check with your gas sup-
ply utility.
Rooms are too hot
Cause Remedy
Room temperature controller incorrectly
set.
Set the required room temperature at the
room temperature controller.
Control unit incorrectly set. ■ Operation with room temperature con-
troller:
Set a lower boiler water temperature
(see page 15).
■ Weather-compensated operation:
Set a lower room temperature (see
page 16).
SERV is displayed (the service function
has been enabled).
The service function will terminate auto-
matically no later than after 30 minutes.
What to do if...
Rooms are too cold
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Cause Remedy
Heating system switched off. ■ Switch the ON/OFF switch ON.
■ Switch the mains isolator ON (if instal-
led).
■ Check the MCB/fuse in the power dis-
tribution board (main domestic MCB/
fuse).
Control unit incorrectly set. Set a required DHW temperature (see
page 17).
Symbol flashes and a fault code (e.g.
F2) will be displayed.
Notify your local heating contractor.
The indication disappears when the fault
has been removed.
No fuel. Open the gas shut-off valve.
■ If necessary, check with your gas sup-
ply utility.
The DHW is too hot
Cause Remedy
Control unit incorrectly set. Set a required DHW temperature (see
page 17).
SERV is displayed (the service function
has been enabled).
The service function will terminate auto-
matically no later than after 30 minutes.
What to do if...
There is no hot water
5513 086 GB