Viessmann VITOTRONIC 300-K User manual

for use by heating contractor
Please file in Service Binder
Product may not be exactly as shown
5693 977 v1.0 06/2013
VITOTRONIC 200
VITOTRONIC 300-K
Vitotronic 200, type H01B
Digital boiler control unit
Vitotronic 300-K, type MW2B
Weather-compensated, digital cascade control unit
Operating Instructions
Vitotronic 300-K
Vitotronic 200
Read and save these instructions
for future reference.
IMPORTANT
Certified as a component
part for Viessmann boilers

Vitotronic 200 and 300-K Operating
5693 977 v1.0
General
Safety, Installation and Warranty Requirements
Please ensure that these instructions are read and understood before commencing installation. Failure to comply with
the instructions listed below and details printed in this manual can cause product/property damage, severe personal
injury, and/or loss of life. Ensure all requirements below are understood and fulfilled (including detailed information
found in manual subsections).
WARNING
Installers must follow local regulations with respect to
installation of carbon monoxide detectors. Follow the
Viessmann maintenance schedule of the boiler contained
in this manual.
Product documentation
Read all applicable documentation before commencing
installation. Store documentation near boiler in a
readily accessible location for reference in the future
by service personnel.
uFor a listing of applicable literature,
please see section entitled “Important
Regulatory and Safety Requirements”.
Warranty
Information contained in this and
related product documentation must
be read and followed. Failure to do
so renders the warranty null and void.
Licensed professional heating contractor
The installation, adjustment, service and maintenance
of this equipment must be performed by a licensed
professional heating contractor.
uPlease see section entitled
“Important Regulatory and Installation
Requirements”.
Advice to owner
Once the installation work is complete, the heating
contractor must familiarize the system operator/
ultimate owner with all equipment, as well as safety
precautions/requirements, shutdown procedure, and
the need for professional service annually before the
heating season begins.
Carbon monoxide
Improper installation, adjustment, service and/or
maintenance can cause flue products to flow into
living space. Flue products contain poisonous carbon
monoxide gas.
uFor information pertaining to the
proper installation, adjustment, service
and maintenance of this equipment to
avoid formation of carbon monoxide,
please see subsection entitled
“Mechanical room” and “Venting
requirements” in the “Installation Instructions”.
Fresh air
This equipment requires fresh air for
safe operation and must be installed
ensuring provisions for adequate
combustion and ventilation air exist.
uFor information pertaining to the
fresh air requirements of this product,
please see subsection entitled
“Mechanical room” in the “Installation
Instructions”.
Equipment venting
Never operate boiler without an installed venting
system. An improper venting system can cause
carbon monoxide poisoning.
uFor information pertaining to
venting and chimney requirements,
please see section entitled “Venting
Connection”. All products of
combustion must be safely vented
to the outdoors.
Operating and Service Documentation
It is recommended that all product documentation such as
parts lists, operating and service instructions be handed
over to the system user for storage. Documentation is to
be stored near boiler in a readily accessible location for
reference by service personnel.
2

Vitotronic 200 and 300-K Operating
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Page
Table of Contents
General
Safety
Operation
Central Heating
Comfort and Energy Saving Functions
DHW Heating
Further Adjustments
Safety, Installation and Warranty Requirements..............2
About these Instructions..............................................3
For your Safety......................................................3
Where to Find the Controls..........................................8
Controls, Vitotronic 200..............................................8
How to use the Controls, Vitotronic 200.......................9
Controls, Vitotronic 300-K.........................................10
Menu, Vitotronic 300-K.............................................11
How to use the Controls, Vitotronic 300-K..................12
ControlsOverview.....................................................14
Start-up/Standby/Shutdown.......................................14
Required Settings......................................................16
Selecting a Heating Circuit.........................................16
Setting the Room Temperature...................................17
Setting the Heating Program for Central Heating...........17
Setting the Time Program for Central Heating...............18
..
Changing the Heating Curve.......................................19
Stopping the Central Heating......................................19
Selecting ComfortFunction “Party Mode”....................20
Selecting Energy Saving Function “Economy Mode”......20
Selecting Energy Saving Function “Holiday Program”....21
Required Setings (DHW Heating).................................22
Setting the DHW Temperature....................................22
Setting the Heating Program for DHW Heating..............22
Setting the Time Program for DHW Heating.................23
Stopping DHW Heating..............................................24
Selecting the Boiler Sequence.....................................25
Setting the Display Contrast.......................................25
Setting the Display Brightness....................................25
Entering Names for the Heating Circuit........................26
Selecting the Language..............................................26
Setting the Time and Date.........................................27
Setting the Temperature Unit (oC/oF)...........................27
Restoring the Factory Settings....................................27

Table of Contents
4
Page
5693 977 v1.0
Vitotronic 200 and 300-K Operating
Scanning Options
Troubleshooting
Maintenance
Additional Information
Calling up the Service Level........................................28
Diagnostics..............................................................29
......
Checking Outputs (Relay Tests)...............................31
Scanning Information.................................................32
Scanning Service Maessages......................................33
Scanning Fault Messages...........................................33
Emmissions Test Mode..............................................34
Rooms are Too Cold.................................................35
Rooms are Too Hot...................................................36
The DHW is Too Hot.................................................36
There is No Hot Water...............................................37
“OFF” is Displayed at the Vitotronic 200.....................37
“ ” is Displayed at the Vitotronic 200........................37
..
“ “ is Displayed at the Vitotronic 200.........................38
“ “ Flashes and “Fault” is Displayed at the
Vitotronic 300-K.......................................................38
“Controls Locked Out”is Displayed at the
Vitotronic 300-K.......................................................38
“External Hook-up” is Displayed at the
Vitotronic 300-K.......................................................38
“Central Control” is Displayed at the
Vitotronic 300-K.......................................................38
“External Program” is Displayed at the
Vitotronic 300-K.......................................................38
Maintenance............................................................39
Menu Overview, Vitotronic 300-K..............................40
Terninology.............................................................43

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5693 977 v1.0
Vitotronic 200 and 300-K Operating
About these Instructions
For your Safety
Safety
Take note of all symbols and notations intended to draw attention to potential hazards or important product
information. These include “WARNING”, “CAUTION”, and “IMPORTANT”. See below.
u
IMPORTANT
uWarnings draw your attention to the presence of
potential hazards or important product information.
uCautions draw your attention to the presence of
potential hazards or important product information.
uHelpful hints for installation, operation or maintenance
which pertain to the product.
uThis symbol indicates that additional, pertinent
information is to be found.
uThis symbol indicates that other instructions must
be referenced.
WARNING
Indicates an imminently hazardous situation which,
if not avoided, could result in loss of life, serious injury
or substantial product/property damage.
CAUTION
Indicates an imminently hazardous situation which,
if not avoided, may result in minor injury or product/
property damage.
HOperation
Before operating the boiler, make sure you fully
understand its method of operation. Your heating
contractor should always perform the initial start-up
and explain the system. Any warranty is null and void
if these instructions are not followed.
HFlue gas smell
- Deactivate heating equipment.
- Open windows and doors.
- Inform your heating contractor.
HWorking on the equipment
All personnel working on the equipment or the heating
system must have the proper qualifications and hold
all necessary licenses. Ensure main power to
equipment, heating system, and all external controls
has been deactivated. Close main gas supply valve.
Take precautions in all instances to avoid accidental
activation of power during service work.
HDangerous conditions
- Deactivate main power immediately.
- Close gas supply valve.
HMaintenance and cleaning
Regular inspection and service by a qualified heating
contractor is important to the performance of the boiler.
Neglected maintenance impacts on warranty; regular
inspection ensures clean, environmentally friendly and
efficient operation. We recommend a maintenance
contract with a qualified heating contractor.
HTechnical Data Manual
- Installation Instruction and Service Instructions
- Operating Instructions and User’s Information Manual
Additional applicable literature:
- Accessory manuals

Vitotronic 200 and 300-K Operating
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CAUTION
Should overheating occur or the gas supply fail to
shut off, do not disconnect the electrical supply to the
pump. Instead, shut off the gas supply at a location
external to the appliance.
WARNING
As there are no user-serviceable parts on the boiler,
burner or control, the end-user must not perform
service activities or adjustments of any kind on
system components. Failure to heed this warning can
cause property damage, severe personal injury, or loss
of life.
WARNING
Improper installation, adjustment, service, or
maintenance can cause flue products to flow into
living space. Flue products contain poisonous carbon
monoxide gas which can cause nausea or asphyxiation
resulting in severe personal injury or loss of life.
WARNING
The operator/ultimate owner is required to have the
heating boiler, burners, and controls checked, as a
minimum once per year, by the original installer or by
a competent heating contractor familiar with the
equipment. Defects must be corrected immediately.
CAUTION
Do not use this boiler if any part has been under water.
Immediately call a qualified heating contractor to inspect
the boiler and to replace any part of the control system
and any gas control which has been under water.
For your Safety (continued)
HCarbon monoxide
The U.S. Consumer Product Safety Commission
strongly recommends the installation of carbon
monoxide detectors in buildings in which gas-burning
equipment is installed. Carbon monoxide (CO) is
a colorless, odorless gas, which may be produced
during incomplete combustion of fuel and/or when
the flame does not receive an adequate supply of
combustion air. Carbon monoxide can cause severe
personal injury or loss of life. Therefore, carbon
monoxide detectors that are in compliance with
a nationally recognized standard (e.g. ANSI/UL
2034-2002, CSA 6.19-01) should be installed and
maintained in buildings that contain gas-burning
equipment.
Note: Viessmann does not test any detectors and
makes no representation regarding any brand
or type of detector.
HFor safe operation
We recommend that you frequently:
- Check for debris which could obstruct
the flow of flue gases. The vent or chimney must
not be blocked. A blocked or partially blocked vent
or chimney can cause flue gases to leak into the
structure. Flue gases leaking into the house can
cause injury or death. Blocked or partially blocked
chimneys must have the blockage removed by a
qualified heating contractor.
- Check pressure gage for correct system (water)
pressure. Check for water on the floor from the
discharge pipe of the pressure relief valve or any
other pipe, pipe joint, valve or air vent.
- Check for moisture, water, or appearance of rust
on the flue gas pipes, their joints as well as vent
dampers, or side wall vent terminals (if so equipped).
- Ensure that nothing is obstructing the flow of
combustion and ventilation air and no chemicals,
garbage, gasoline, combustible materials, flammable
vapors and liquids are stored (not even temporarily)
in the vicinity of the boiler.
- Do not allow unsupervised children near the boiler.
Service/inspection of the boiler and the system is
recommended once a year. Maintenance, service and
cleaning are specified in the Installation Instructions.
Before the heating season begins, it is recommended that
the boiler and burner be serviced by a qualified heating
contractor. Service contracts may be established through
gas suppliers or other licensed contractors in your area.
WARNING
Fire causes a risk of burns and explosion!
- Shut down the boiler
- Close fuel shut-off valves
- Use a tested fire extinguisher, class ABC.
If you notice fire coming from the appliance, call the fire
department immediately! Do not attempt to extinguish
the fire unless qualified to do so.
Safety

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5693 977 v1.0
Vitotronic 200 and 300-K Operating
WARNING
Failure to protect against frozen pipes could result in
burst water pipes, serious property damage and/or
personal injury. Boiler may shut down. Do not leave
your home unattended for long periods of time during
freezing weather conditions without turning off the
water supply and draining water pipes or otherwise
protecting against the risk of frozen pipes.
Frozen water pipe hazard
Your heating boiler is designed to provide a warm and
comfortable living environment. It is not designed to
ensure against freezing of water pipes. The boiler is
equipped with several safety devices that are designed
to shut down the boiler and to prevent it from restarting
in the event of various unsafe conditions.
If your boiler remains off for an extended period of time
during cold weather, water pipes may freeze and burst,
resulting in extensive water damage and conditions in
which mold could grow. Certain molds are known to
cause respiratory problems, as well as to pose other
serious health risks. In case of water damage, immediate
measures should be taken to dry out affected areas as
quickly as possible to prevent mold from developing.
If your home will be unattended for an extended period
of time during cold weather, you should...
HShut off the water supply to the building, drain the
water pipes and add an antifreeze for potable water
to drain traps and toilet tanks. Open faucets where
appropriate.
Or..
HHave someone check the building frequently during cold
weather and call a qualified service agency if required.
Or...
HInstall a reliable remote temperature sensor that will
notify somebody of freezing conditions within the
home.
For your Safety (continued)
WARNING
Incorrect ambient conditions can lead to damage to
the heating system and put safe operation at risk.
IMPORTANT
Installation area conditions
HEnsure ambient temperatures are higher than 32° F
(0° C) and lower than 104° F (40° C).
HPrevent the air from becoming contaminated by
halogenated hydrocarbons (e.g. as contained in
paint solvents or cleaning fluids) and excessive dust
(e.g. through grinding or polishing work).
Combustion air for the heating process, and ventilation
of the boiler room must be free of corrosive
contaminants. To that end, any boiler must be installed
in an area that has no chemical exposure. The list to
the right indicates the main, currently known sources.
HAvoid continuously high levels of humidity
(e.g. through frequent drying of laundry).
HNever close existing ventilation openings.
Components which are not tested with the heating
system may damage the heating system, or affect its
functions. Installation or replacement may only be
carried out by a qualified heating contractor.
Replacement components, spare and wear parts
Sources of combustion and ventilation air contaminants
Areas likely to contain contaminants:
HNew building construction
HSwimming pools
HRemodelling areas, hobby rooms
HGarages with workshops
HFurniture refinishing areas
HDry cleaning/laundry areas and establishments
HAuto body shops
HRefrigeration repair shops
HMetal fabrication plants
HPlastic manufacturing plants
HPhoto processing plants
HBeauty salons
Products containing contaminants:
HChlorine-type bleaches, detergents and cleaning
solvents found in household laundry rooms
HPaint and varnish removers
HHydrochloric acid, muriatic acid
HChlorine-based swimming pool chemicals
HSpray cans containing chlorofluorocarbons
HChlorinated waxes and cleaners
HCements and glues
HRefrigerant leaks
HCalcium chloride used for thawing
HSodium chloride used for water softening salt
HPermanent wave solutions
HAdhesives used to fasten building products and other
similar items
HAntistatic fabric softeners used in clothes dryers
Safety

Vitotronic 200 and 300-K Operating
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Operation
Where to Find the Controls
Each boiler is equipped with its own control unit for
constant temperature operation.
These control units are regulated by a higher weather-
compensated cascade control unit.
HControl unit in constant temperature mode on the boiler:
Vitotronic 200
HHigher weather-compensated cascade control unit:
Vitotronic 300-K
You can change all settings for your heating system
centrally at the control unit programming unit.
You may also make such changes at the remote control
units, if your system is equipped with such units.
The settings at the Vitotronic 200 are described in these
operating instructions. You do not need the operating
instructions provided with these control units.
Controls, Vitotronic 200
See the Remote Control Operating Instructions.
Takes you to the previous step in the menu or cancels
a setting that has been started.
Cursor keys
To scroll through the menu or to set values.
OK Confirms your selection or saves the setting.
? No function.
Enables you to call up the menu for settings and
scanning.
Vitotronic 300-K
Vitotronic 200, type HO1B

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5693 977 v1.0
Vitotronic 200 and 300-K Operating
How to Use the Controls, Vitotronic 200
Operation
Symbols
These symbols are not always displayed, but appear
subject to the system version and the operating state.
Flashing displays indicate that modifications can be made.
Note: If a boiler is not in operation, the following appears
in the display of the corresponding control unit:
In multi boiler systems, each Vitotronic 200 indicates
the boiler number on the standard display. The following
example shows the boiler water temperature as indicated
by boiler 3.
Messages
Service message
 Fault message
E Burner fault
Displays
pCirculation pump at output 20 is running
A Burner in operation
D Factory settings
Press .
This takes you to the menu for settings and scanning.
Menu
Information
Further adjustments
S Emissions test mode
Heating program
9 Standby mode with frost protection monitoring
The boiler is available to the cascade control unit
for heat production.
Off

Vitotronic 200 and 300-K Operating
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Operation
Controls, Vitotronic 300-K
Opening the control unit
The programming unit is located behind the flap.
To open, pull the flap from the top edge forward.
Programming unit
Takes you to the previous step in the menu or
cancels a setting that has been started.
Cursor keys
To scroll through the menu or to set values.
OK Confirms your selection or saves the setting.
? To call up additional information regarding the
selected menu option.
Calls up the extended menu.
Menu “Help”
You can view a short guide giving an explanation of the
controls and information about heating circuit selection
(see page 21).
Call up the short guide as follows:
HIf the screen saver is active (see page 12):
Press ?
HFrom anywhere in the menu:
Press until the standard menu is shown (see the
following chapter).
Press ?
ACover flap

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5693 977 v1.0
Vitotronic 200 and 300-K Operating
Menu, Vitotronic 300-K
Operation
There are two control levels available, the “Standard
menu” and the “Extended menu”.
The menu overview can be found on page 42.
Standard menu
Call up the standard menu as follows:
HIf the screen saver is active (see page 12)
Press OK.
HFrom anywhere in the menu:
Keep pressing until the standard menu appears.
In the standard menu, the number of boilers installed
in the heating system is shown in a specific order
(boiler sequence). You can change the boiler sequence
(see page 25).
The meanings of the icons are as follows:
HSolid white:
The boiler has been enabled by the cascade control unit
and is operating (boiler 3 in this example).
HSolid grey:
The boiler is available for generating heat but has not
been enabled by the cascade control unit (boilers 2 and
4 in this example).
HSolid black and crossed out:
This boiler is not available for heat production (boiler 1
in this example).
Note: 2 minutes after any setting has been made, the
display automatically reverts to the standard menu.
Extended menu
Call up the extended menu as follows:
HIf the screen saver is active (see page 12):
Press OK and then .
HFrom anywhere in the menu:
Press .
Note: Your heating contractor can block the use of the
extended menu. In this case, you can only scan
fault messages.
ADialogue line

Vitotronic 200 and 300-K Operating
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Operation
How to Use the Controls, Vitotronic 300-K
1. Press OK. This takes you to the standard menu
(see page 13).
2. Press . This takes you to the extended menu
(see page 11). The selected menu option is
highlighted in white.
The dialogue line A(see diagram on page 11) then
shows the necessary instructions.
The following diagram shows how to make settings with
different dialogue lines, using the set room temperature
setting as an example.
The screen saver will become active if you have not
adjusted any settings on the programming unit for a few
minutes.
The display brightness is reduced.
How to Use the Controls, Vitotronic 300-K

13
5693 977 v1.0
Vitotronic 200 and 300-K Operating Operation
How to Use the Controls, Vitotronic 300-K (continued)

Vitotronic 200 and 300-K Operating
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14
Central Heating
Controls Overview
Vitotronic 200, type HO1B
Legend
AFault indicator (red)
BON indicator (green)
CReset button
DON/OFF switch
EPressure gauge (pressure display)
FUser interface
Controls with cover flap open
Legend
AON indicator (green)
BFault indicator (red)
CEmissions test switch (only for service purposes)
DON/OFF switch
EFuse
FUser interface
Vitotronic 300-K

15
5693 977 v1.0
Vitotronic 200 and 300-K Operating Central Heating
Start-up/Standby/Shutdown
1. Check the heating system pressure at the pressure
gauge. The system pressure is too low if the indicator
points to the area below 15 psi or is below the red
band. In this case, top up with water or notify your
local heating contractor.
2. Check that the ventilation apertures of the installation
room are open and unrestricted.
Note: With open flue operation, the combustion air is
drawn from the installation room.
3. Open the gas shut-off valve.
4. Switch ON the power supply, e.g. at a separate
MCB/fuse or a main electrical disconnect.
5. Switch ON the ON/OFF switches at all Vitotronic 200
and at the Vitotronic 300-K (see chapter “Controls”).
After a short time, the following is shown on the
display:
H Vitotronic 200: the standard display (see page 8)
H Vitotronic 300-K: the standard menu (see page 13)
The green ON indicator illuminates.
Your heating system and, if installed, your remote
control units are now ready to operate.
Note: On every Vitotronic 200, “ “ must be selected,
otherwise the Vitotronic 300-K cannot use the
corresponding boiler to produce heat.
Starting the heating system
Placing each boiler in standby with frost protection
monitoring
At the relevant Vitotronic 200, press the following keys:
1. for settings; “ “ flashes.
2. OK to confirm; “9 w “ flashes.
3. OK to confirm; “ w “ flashes.
4. ⊳
until “9“ flashes.
5. OK to confirm.
Note: The circulation pumps are briefly started every 24
hours to prevent them from seizing up.
To end the heating program “Standby mode” select
another heating program.
Shutting down the heating system without frost
protection monitoring
1. Switch OFF the ON/OFF switches at all Vitotronic
200 and Vitotronic 300-K (see chapter “Controls”).
2. Close the gas shut-off valve.
3. Isolate the heating system from its main power
supply, e.g. at a separate MCB/fuse or a mains
isolator.
4. Where outside temperatures of below 37.5° F (3° C)
are anticipated, please take suitable measures to
protect the heating system against frost. If necessary,
contact your heating contractor.
Information on a prolonged shutdown
HCirculation pumps may seize up as they are not supplied
with power.
HVitotronic 300-K:
It may be necessary to reset the date and time
(see page 26).
Placing the heating system in standby with frost protection
monitoring
At the Vitotronic 300-K, select the heating program
“Standby mode” for every heating circuit.
HNo central heating.
HNo DHW heating.
HFrost protection for the heating circuits and the DHW
tank is active.
Extended menu
1.
2. “Heating”
3. Select the heating circuit, if necessary (see page 16).
4. “Heating program”
5. “Standby mode” (frost protection monitoring)

Vitotronic 200 and 300-K Operating
5693 977 v1.0
16
Central Heating
Required Settings
Make the settings for central heating at the Vitotronic
300-K.
If you want central heating, check the following points:
HHave you selected the heating circuit?
For settings, see the next chapter.
HHave you set the required room temperature?
For settings, see page 17.
HHave you selected the correct heating program?
For settings, see page 17.
HHave you set the required time program?
For settings, see page 18.
Selecting a Heating Circuit
The heating of all rooms can, if necessary, be split over
several heating circuits.
HIn 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.
HThis selection is not possible in heating systems with
only one heating circuit.
Example:
H“Heating circuit 1” is the heating circuit for the offices
on the ground floor.
H“Heating circuit 2” is the heating circuit for the offices
on the first floor.
The heating circuits are marked at the factory as “Heating
circuit 1” (HC1), “Heating circuit 2” (HC2) and “Heating
circuit 3” (HC3).
If you or your heating contractor have renamed the
heating circuits (e.g. as “Ground floor” etc.), the name
is displayed instead of “Heating circuit ...” (see page 26).
Extended menu
1.
2. “Heating”
3. for the required heating circuit.

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5693 977 v1.0
Vitotronic 200 and 300-K Operating Central Heating
Setting the Room Temperature
Setting the room temperature for reduced heating mode
(night setback)
Factory setting: 37.5° F (3° C)
Extended menu
1.
2. “Heating”
3. Select the heating circuit, if necessary (see page 16).
4. “Set red. room temp”
5. Set the required value.
The rooms are heated to this temperature:
HBetween the time phases for standard heating mode
(see page 18).
HIn the holiday program (see page 21).
Setting the room temperature for standard heating mode
Factory setting: 68° F (20° C)
Extended menu
1.
2. “Heating”
3. Select the heating circuit, if necessary (see page 16).
4. “Set room temperature”
5. Set the required value.
Setting the Heating Program for Central Heating
Factory setting: “Heating and DHW”
Extended menu
1.
2. “Heating”
3. Select the heating circuit, if necessary (see page 16).
4. “Heating program”
5. “Heating and DHW”
HThe rooms of the selected heating circuit are heated
in accordance with the room temperature and time
program settings.
HDHW is reheated in accordance with the set DHW
temperature and time program (see chapter “DHW
heating”).

Vitotronic 200 and 300-K Operating
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18
Central Heating
Setting the Time Program for Central Heating
HThe time program for central heating is made up of time
phases. One time phase from 6:00 to 22:00 h for every
day of the week is set at the factory.
HYou can set the time program individually, to be
the same for every day of the week or different:
You can select up to 4 time phases per day for standard
heating mode. Set the start and end points for each
time phase. Between these time phases, the rooms are
heated with the reduced room temperature (see chapter
“Setting the room temperature for reduced heating
mode”).
HWhen setting, bear in mind that your heating system
requires some time to heat the rooms to the required
temperature.
HIn the extended menu, you can scan the current time
program under “Information” (see chapter “Scanning
information”, “Heating circuit ...” group).
Extended menu:
1.
2. “Heating”
3. Select the heating circuit if necessary.
4. “Heating time program”
5. Select part of the week or a day.
6. Select the time phase !,?, §or $.
7. Set the start and end points for the relevant time
phase.
8. Press to exit the menu.
Note: If you want to terminate a time phase setting
process prematurely, keep pressing until the
required display appears.
Example shown:
HTime program for Monday to Friday
(“Mo-Fr”)
HTime phase !:
From 05:00 to 08:30 h
HTime phase ?:
From 16:30 to 23:00 h
Deleting a time phase
Set the time for the end point to the same time that was
set for the start point. The display shows the selected
time phase ”- - : - -”.
Example:
You want to set the same time program for every day
except Monday:
Select the period “Monday–Sunday” and set the time
program.
Then select “Monday” and set the time program for this.

19
5693 977 v1.0
Vitotronic 200 and 300-K Operating Central Heating
Changing the Heating Curve
Your system’s heating characteristics are affected by the
slope and the shift of the selected heating curve. Further
information about the heating curve can be found under
“Terminology” on page 43.
Factory setting:
HSlope: 1.4
HHeating curve shift: 0
HStandard room temperature (set value): 68º F (20º C)
HReduced room temperature (set value): 37º F (3º C)
Extended menu:
1.
2. “Heating”
3. Select the heating circuit, if necessary (see page 16).
4. “Heating curve”
5. “Slope” or “Shift”
Note: Tips on when and how to change the heating
curve slope and shift are displayed by pressing ?.
.
6. Set the required value.
Example:
Change the heating curve slope to 1.5.
A graph clearly shows the change in the heating curve
as soon as you alter the value for slope or shift.
Depending on various outside temperatures (shown on
the horizontal axis), the assigned set supply temperatures
for the heating circuit are highlighted white.
Stopping Central Heating
Extended menu
1.
2. “Heating”
3. Select the heating circuit, if necessary (see page 16).
4. “Heating program”
5. “Only DHW” (summer mode, no central heating)
or
“Standby mode” (frost protection monitoring)

Vitotronic 200 and 300-K Operating
5693 977 v1.0
20
Comfort and Energy Saving Functions
Selecting Comfort Function “Party Mode”
Make the settings for the comfort function at the
Vitotronic 300-K.
With this function, you can change the room temperature
for several hours, e.g. if guests unexpectedly stay longer
in the evening. You do not have to change any existing
control settings. With this function, DHW is reheated to
the selected set temperature.
Extended menu
1.
2. “Heating”
3. Select the heating circuit, if necessary (see page 16).
4. “Party mode”
5. Set the room temperature required during party mode.
HThe rooms are heated to the required temperature.
HDHW is reheated to the selected set temperature.
HThe DHW circulation pump is switched ON (if installed).
Ending party mode
HAutomatically when the system switches to standard
heating mode in accordance with the time program.
or
HIn the extended menu, set “Party mode” to “OFF”.
Selecting Energy Saving Function “Economy Mode”
Make the settings for the energy saving function at the
Vitotronic 300-K.
To save energy, you can reduce the room temperature
in standard heating mode. For example, if you leave your
home for a few hours.
Extended menu
1.
2. “Heating”
3. Select the heating circuit, if necessary (see page 16).
4. “Economy mode”
Ending economy mode
HAutomatically when the system switches to reduced
heating mode in accordance with the time program.
or
HIn the extended menu, set “Economy mode” to “OFF”.