Viessmann VITOLIGNO 300-C User manual

for use by heating contractor
5790 982 - 02 09/2017
Operating Instructions
VITOLIGNO 300-C
Wood pellet boiler, with Ecotronic weather-compensated,
digital boiler and heating circuit control unit
Heating input: 44 MBH to 193 MBH
13 kW to 57 kW
Please file in Service Binder
Read and save these instructions
for future reference.
IMPORTANT
Do not store or use gasoline or other
flammable liquids in the vicinity of this
or any other appliance.
WHAT TO DO IF YOU SMELL FLUE GAS
Leave the premises immediately and
call the fire department.
Installation and service must be
performed by a qualified contractor.
If the information in this manual is not followed
exactly, a fire or explosion may result causing
property damage, personal injury or loss of life.
WARNING
Improper installation, adjustment, and/
or operation could cause carbon monoxide
poisoning resulting in injury or loss of life.
This product must be installed and serviced
by a professional service technician who is
experienced and qualified in hot water boiler
installation.
WARNING
Product may not be exactly as shown
H

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22
Safety Instructions
Safety
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 “Service Instructions”.
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.
For 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.
Please see section entitled
“Important Regulatory and Installation
Requirements”.
Contaminated air
Air contaminated by chemicals can cause by-products
in the combustion process, which are poisonous to
inhabitants and destructive to
Viessmann equipment.
For a listing of chemicals which
cannot be stored in or near the
boiler room, please see subsection
entitled “Mechanical Room”.
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.
For information pertaining to the
proper installation, adjustment, service
and maintenance of this equipment to
avoid formation of carbon monoxide,
please see sections entitled
“Mechanical Room” and “Venting
Connection” 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.
For information pertaining to the
fresh air requirements of this product,
please see subsection entitled
“Mechanical Room”.
Equipment venting
Never operate boiler without an installed venting
system. An improper venting system can cause
carbon monoxide poisoning.
For information pertaining to
venting and chimney requirements,
please see section entitled “Venting
Connection”. All products of
combustion must be safely vented
to the outdoors.

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Vitoligno 300-C Operating
Safety Instructions
Safety
Please follow these safety instructions closely to prevent
accidents and material losses.
Target group
These operating instructions are designed for heating
system users. This appliance can also be operated by
children of 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 as well as in any risks
arising from it.
Supervise children in the proximity of the appliance.
Never permit children to play with the appliance.
Cleaning and maintenance must not be carried
out by unsupervised children.
Appliance connection
The appliance may only be connected and commissioned
by authorized contractors.
Only operate the appliance with suitable fuels.
Observe the specified electrical connection requirements.
Modifications to the existing installation may only be
carried out by authorized contractors.
IMPORTANT
IMPORTANT
WARNING
Incorrectly executed work on the heating system can lead
to life threatening accidents. 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 carried
out as specified in these operating instructions.
Further work on the appliance may only be carried out
by authorized contractors.
Never change or remove attachments or fitted
accessories.
Never open or retighten pipe connections.
WARNING
Hot surfaces can cause burns. Never touch the hot
surfaces inside the appliance or those of uninsulated
pipes, fittings or flue pipes.
WARNING
Flue gas can lead to life threatening poisoning.
Shut down the heating system.
Ventilate the installation site.
Close all doors in the living space.
If you smell flue gas
WARNING
Fire presents a risk of burns and explosion.
Shut down the heating system.
Use a tested fire extinguisher, class ABC.
In case of fire

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Extractors
The operation of appliances that extract air to the outside
(range hoods, extractors, air conditioning units, etc.) can
create vacuum pressure. If the boiler is operated at the
same time, this can lead to reverse flow of the flue gas.
Auxiliary components, spare and wearing parts
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 (continued)
Safety
What to do if the heating system develops a fault
Conditions for siting
IMPORTANT
Incorrect ambient conditions can lead to heating system
damage and can put safe operation at risk.
Ensure ambient temperatures are above 32°F (0°C) and
below 95°F (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).
WARNING
Fault messages indicate faults in the heating system.
If faults are not rectified, they can have life threatening
consequences. Do not acknowledge fault messages
several times in quick succession. Inform your heating
contractor so the cause can be analyzed and the fault
rectified.
WARNING
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).
WARNING
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 installation room or in direct proximity to the
heating system.
IMPORTANT
WARNING
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 heating contractor.
4

Table of Contents
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Page
Vitoligno 300-C Operating
Safety, Installation and Warranty Requirements..............2
Safety Instructions .....................................................3
About These Instructions ............................................7
Product Information....................................................7
Ordering Fuel .............................................................8
Commissioning ..........................................................9
Regular Service Inspection...........................................9
Your System is Preset at the Factory ..........................10
Energy Saving Tips...................................................10
Boiler Control and Components ..................................11
Control Unit Controls and Display Elements .................12
Heat-up Preparations ................................................12
Action in the Event of Boiler Overheating ....................13
Navigation in the Control Unit Menu ...........................14
Menu Structure of the Control Unit.............................15
Required Settings .....................................................17
Select a Heating Circuit.............................................17
Setting the Room Temperature...................................18
Setting the Operating Program ...................................19
Setting the Time Program..........................................19
Changing the Heating Curve ......................................21
Stopping Central Heating...........................................23
Selecting Party Mode................................................24
Selecting Economy Mode ..........................................25
Selecting the Holiday Program ...................................26
Required Settings .....................................................28
Setting the DHW Temperature ...................................28
Setting the Operating Program ...................................28
Setting the Time Program..........................................29
Stopping DHW Heating .............................................30
Setting the Operating Program ...................................31
Setting the Time Program..........................................32
Setting the Heating Curve .........................................33
Blocking Times for Automatic Fuel Supply ...................34
Safety
Introduction
Boiler
Control
Central Heating
Comfort and Energy Saving Function
DHW Heating
Heating Water Buffer Tank
Fuel Supply

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Page
Table of Contents Vitoligno 300-C Operating
Settings the Display Contrast.....................................35
Setting the Display Brightness....................................35
Naming the Heating Circuits ......................................36
Setting the Time and Date.........................................37
Setting the Language................................................37
Settings the Temperature Unit (°C to °F).....................37
Changing the Boiler Water Temperature ......................38
Setting the Minimum System Temperature ..................38
Restoring the Factory Settings ...................................38
Scanning Fault Messages ..........................................39
Scanning Information................................................40
Shutting Down the Heating System for
an Extended Period...................................................41
Shutdown ...............................................................41
Rooms are Too Cold .................................................42
Rooms are Too Hot ..................................................42
There is No Hot Water ..............................................43
The DHW is Too Hot ................................................43
“Fault” is Shown on the Display.................................43
“Solar Risk of Overheating” Appears on the Display......43
Inspection/Cleaning/Maintenance................................44
Replacing Fuses .......................................................44
Overview of Maintenance and Cleaning Work in the boiler..45
Emptying the Ash Box ..............................................46
Terminology ............................................................47
Efficient and Clean Operation.....................................51
Dismantling .............................................................51
General Energy Saving Tips .......................................51
Further Adjustments
Scanning
Troubleshooting
Maintenance

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Vitoligno 300-C Operating
About These Instructions
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.
CAUTION
Cautions draw your attention to the presence of potential
hazards or important product information.
WARNING
Warnings draw your attention to the presence of potential
hazards or important product information.

IMPORTANT
Indicates an imminently hazardous situation which,
if not avoided, could result in death, serious injury or
substantial product/property damage.
Indicates an imminently hazardous situation which,
if not avoided, may result in minor injury or product /
property damage.
Helpful hints for installation, operation or maintenance
which pertain to the product.
This symbol indicates to note additional information
This symbol indicates that other instructions must be
referenced.
Introduction
Product Information
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 operated for longer periods when open)
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)
or if other fuels than those intended for this appliance
are used.
The Viessmann Vitoligno 300-C boiler series is CSA
certified for Canada, is constructed in compliance with
CSA B51 Standard and carries Canadian Registration
Numbers. The boiler is suitable for a maximum operating
pressure of 45 psig and a maximum boiler water
temperature of 230°F (110°C).
The Vitoligno 300-C boiler must only be installed in closed
loop hot water heating systems using a pre-charged
membrane expansion tank.

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8
Introduction
Ordering Fuel
Delivery methods
Pellets are sold in sacks, in bulk on pallets and loose.
In their loose form, pellets are transported by silo tanker
and pumped into the storage room via a hose system.
Careful handling of pellets ensures a low proportion of
dust, perfect fuel charging and a constant boiler heating
output.
Note: The pellet vacuum system hopper inside the boiler
has a capacity of approx. 3.5 cu. ft (100 L).
This corresponds to approx. 143 lbs. (65 Kg) of
pellets.
If different fuels are used, Viessmann will not assume
any liability for the functioning or service life of the boiler
plant. Refer to the “Warranty” section in the General
Terms and Conditions of Delivery.
- Burn wood pellets only
- Do not use chemicals or fluids to start fire.
- Do not burn any type of waste or garbage.
- Do not burn gasoline, naphtha, engine oil, or other
inappropriate materials.
- Do not use chemicals or fluids to start fire.
IMPORTANT
Pellet requirements
It is recommended that the pellets used comply with the
requirements of the Pellet Fuel Institute (PFI - Standard or
PFI - Premium) and/or CANPlus grade A1 and/or CAN/CSA
- ISO 17225 Part 2 Standard.
Requirement PFI - Standard CANPlus-A1 Specification
as per
CAN/CSA
ISO 17225-2
Grade A1
Diameter .230 - .285 in.
(5.84 - 7.25 mm)
0.236 ± 0.039 in.
(6 ± 1 mm) D06
Length A maximum
of 1% may be
longer than
1.5 in. (38 mm)
A maximum of 1%
may be longer than
1.7 in. (40 mm), but
no longer than
1.77 in. (45 mm)
0.125 to 1.575 in.
(3.15 to 40 mm)
Bulk density in delivered condition lb/cuft
(kg/m³)
38-48
(608-769)
37-47
(600 to 750)
(BD600)
Net calorific value in the delivered condition MJ/kg
kWh/kg
--
--
≥16.5
≥4.6
Q16.5
Q4.6
Water content in delivered condition m-% ≤10 ≥10 M10
Fines content in the delivered condition m-% ≤1 ≤1 F1.0
Mechanical strength in the delivered condition m-% ≥95 ≤97.5 DU 97.5
Ash content, free from water % ≤0.7 A0.7
Ash softening temperature
This value is only binding for pellets certified
to CANPlus.
It indicates the temperature at which the
wood ash is deformed and can therefore
cause fusions in the combustion chamber.
°F
(°C)
--
--
≤2200
(≤1200)
--
--
Chlorine content, free from water m-% ≤300 ppm ≤0.02 C10.2
Sulphur content, free from water m-% -- ≤0.04 S0.04
Nitrogen content, free from water m-% -- ≤0.3 N0.03
m-% = percentage by mass
What are wood pellets?
Wood pellets are made from 100 percent natural wood
remnants. This raw material is waste matter created by the
wood industry in large volumes through planing or sawing.
Wood remnants are compressed under high pressure and
formed into pellets, i.e. pressed into a cylindrical shape.
The raw material is stored and transported under completely
dry conditions. System users should also ensure completely
dry storage conditions. This is the only way to guarantee
optimum and effective combustion.
Consequence of overstepping particle size:
- Increased maintenance because of a substantially higher risk of malfunction
- Shortened service life of the conveyor augers and drives

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Vitoligno 300-C Operating
Commissioning
Commissioning and adjusting the control unit to local
conditions and the structural characteristics of the
building must be carried out by your heating contractor.
As the user of new combustion equipment, you may be
obliged to notify your local heating contractor of the
installation [check local regulations]. Your local heating
contractor [where applicable] will also provide you with
information on additional activities concerning your
combustion equipment (such as regular testing, cleaning,
etc.).
Refer to the Installation and Service Instructions.
Regular Service Inspection
Your heating contractor must prepare the boiler for
this test.
Notify your heating contractor approx. 2 weeks prior
to the next service inspection being due.
Ensure that suitable fuel in line with these operating
instructions is available.
Refer to the Installation and Service Instructions.
Introduction

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10
Introduction
Your System is Preset at the Factory
DHW heating
DHW is heated to 140°F (60°C) “Set DHW temperature”
every day from 12:00 am to 12:00 am (00:00 to 24:00 h).
Your heating contractor can make further settings for
you during commissioning. You can change any settings
at any time to suit your individual requirements (see
from page 28).
Frost protection
Your boiler, DHW tank and heating water buffer
tank are protected against frost. Wintertime/
summertime changeover
This changeover is automatic.
Time and date
The day and time were set by your heating contractor
during commissioning.
Power failure
All data is retained if there is a power failure.
Energy saving tips
Use the adjustment options offered by your boiler control
unit:
For central heating, select the operating program that
meets your current requirements:
– For short periods of absence (a few hours, such as
shopping trips), select “Economy mode” (see page 25).
The room temperature is reduced for as long as
economy mode is active.
– If you are going away, set the “Holiday program”
(see page 26).
The operating program for central heating is
automatically set to “Standby mode” while the holiday
program is active.
– If, for an extended period, you neither want to heat
the interior nor do you require DHW, select the
“Standby mode” operating program for the relevant
heating circuits and for DHW.
– See page 23 for the relevant heating circuits
– See page 28 for DHW heating
Never set the DHW tank temperature excessively
high (see page 28).
Contact your heating contractor for additional energy
saving functions offered by your boiler control unit.
For general recommendations on energy savings, see
page 51.
Your boiler’s control unit is set at the factory.
The heating circuits are set to the “Heating” operating
program.
The domestic hot water heating is set to the “DHW”
operating program.
Your heating system is therefore ready for operation:
Central heating
From 6:00 am to 10:00 pm (06:00 to 22:00 h) your
rooms are heated to 72°F (22°C) “Set room temp”
(standard heating mode).
From 10:00 pm to 6:00 am (22:00 to 06:00 h), your
rooms will be heated to “Set red room temp” (room
temperature for reduced heating mode, night setback).
Your heating contractor can make further settings for
you during commissioning. You can change any settings
at any time to suit your individual requirements (see
from page 18).
Energy Saving Tips

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Vitoligno 300-C Operating Boiler
Boiler Controls and Components
Note: You will find an overview of the cleaning and
maintenance tasks from page 45.
Supply via vacuum system
Supply via flexible screw conveyor
Legend
AProgramming unit of the control unit
BAppliance ON/OFF switch and reset button for
high limit safety cut-out behind the cover
CAsh box
DAccess door (system with vacuum supply only)
WARNING
The appliance ON/OFF switch (behind cover B) is used
to isolate the control unit from the power supply. It does
not turn off the mains power supply. There are live
components inside the control unit enclosure.

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12
Boiler
Control Unit Controls and Display Elements
The programming unit
You can adjust all control unit settings centrally at the
programming unit.
Takes you to the previous step in the menu or
cancels a setting that has been started.
Cursor keys
Scrolls through the menu or adjusts values.
dTo confirm your selection or save the setting
you’ve made.
?Calls up the help text relevant to the selected
menu point.
Calls up the extended menu.
For operating the control unit, see from page 14.
1. Check the pressure of the heating system at pressure
gauge B:
The system pressure is too low if the indicator points
below the minimum operating pressure. In this case,
top up with water or notify your heating contractor.
Minimum system pressure: 14.5 psi (1.0 bar).
2. Check that the vents in the installation room are
unrestricted.
Note: With room air dependant operation, the
combustion air is drawn from the installation
room.
3. Verify that the heating system or the heating water
buffer tank is drawing off heat. Open the thermostatic
valves on the radiators if necessary.
4. Ensure that all heating supply and heating return
shut-off gate valves are open.
5. Check that all covers on the boiler are closed.
6. Ensure that power is supplied to the boiler.
Heat-up Preparations
Ask your heating contractor about the following:
HBoiler type and relevant control unit type
HRequired system pressure
HLocation of the pressure gauge, shut-off valve, gas
shut-off valve, ventilation apertures
Legend
APressure relief valve (PRV)
BTemperature and pressure gauge
CAir vent
DLow water cutoff

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Vitoligno 300-C Operating Boiler
Action in the Event of Boiler Overheating
The high limit safety cut-out protects your boiler from
overheating.
Note: Never make adjustments at the high limit safety
cutout, which would result in an exclusion of
liability. Replace faulty components only with
genuine spare parts from Viessmann.
Note: Notify your heating contractor if the boiler
overheats again after a short time or overheats
regularly.
Boiler water temperature has reached 230°F (110°C)
High limit safety cut-out
The reset button of the high limit safety cut-out is located
behind cover Aof the programming unit.
Note: Any high limit safety cut-out response requires a
manual reset.
Triggering the function:
The high limit safety cut-out will respond if the boiler
water temperature exceeds 230°F (110°C).
Resetting the fixed high limit
Note: The high limit safety cut-out can only be reset
once the boiler water temperature has reached
approx. 140°F (60°C).
1. Slide cover Aon the programming unit to the right.
2. Press the green button on the high limit safety cutout.
A quiet “click” will be audible. The high limit safety
cut-out has been reset.
3. Close the programming unit cover.
4. Acknowledge the excess temperature on the
programming unit of the control unit with d.

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14
Control
Navigation in the Control Unit Menu
Legend
ADisplay of operating phase
B Start-stop pushbutton
C Dialogue line
The selected menu point is highlighted in white.
Dialogue line Cgives the necessary instructions.
Start-Stop pushbutton function B
Start-stop pushbutton:
Does not illuminate The boiler is off; no frost protection.
Illuminates The boiler is in standby mode and
will start automatically on demand
or the boiler is operating.
Flashes
Flashing slowly
Flashing rapidly
The boiler completely burns the
available fuel
or
An external demand via coding
address 44 was activated
Note: The start-stop pushbutton is
disabled if an external
programming unit is connected.
The boiler can only be switched
on and off via the external unit.
Contact at plug sMÖ closed
There is an external demand.
Contact at plug sMÖ open
There is no current demand.
Example: Procedure for settings with different dialogue lines

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Vitoligno 300-C Operating Control
Menu Structure of the Control Unit
There are 2 control levels available: the “Standard
menu” and the “Extended menu”.
Standard menu
You can call up the settings you require most frequently
from the standard menu:
Select the set room temperature.
Set the operating program.
Set the “Party mode” comfort function.
Set the energy saving function “Economy mode”.
Scan the operating status.
Calling up temperatures, e.g. outdoor temperatures
Scan information.
Scan notes, warning and fault messages.
Call up the standard menu as follows:
If the screensaver is active: Press any key.
From anywhere in the menu: Press repeatedly
until the standard menu appears.
Extended menu
In the extended menu, you can call up and adjust the
settings of the control unit’s range of less frequently
required functions, holiday program and time programs
for example.
Call up the extended menu as follows:
If the screensaver is active:
Press any key followed by .
From anywhere in the menu: Press .

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16
Control
Menu Structure of the Control Unit (continued)
Screensaver
The screensaver will be enabled if no adjustments
are made on the programming unit for a few minutes.
Depending on the operating phase, the screensaver
will inform you about the current values of the boiler
or heating water buffer tank.
Press any key. This takes you to the standard menu
(see page 15).
“Help” menu
You can view an abridged guide giving an explanation
of the controls and information about heating circuit
selection.
Call up the short guide as follows:
From anywhere in the menu:
Call up the “Help” menu point by pressing “?”.
Screensaver during operating phase “Boiler load operation”
Screensaver during operating phase “Buffer drawing”
Legend
ABoiler supply temperature 163°F (73°C)
BOperating phase
CBoiler return temperature 133°F (56°C)
DFlue gas temperature 275°F (135°C)
EDialogue line
FBoiler heating output
GFeed delivery rate (pellets)
HPellet hopper fill level (where installed)
Legend
AOperating phase
BHeating water buffer tank heat-up condition in %
CDialogue line
DHeating water buffer tank temperature - bottom,
93°F (34°C)
EHeating water buffer tank temperature - centre,
144°F (62°C)
FHeating water buffer tank temperature - top,
163°F (73°C)

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Vitoligno 300-C Operating Central Heating
Required Settings
Selecting a Heating Circuit
If you require central heating, check the following points:
Have you selected the heating circuit?
For settings, see chapter “Selecting a heating circuit”
on page 17.
Have you set the required room temperature?
For settings, see page 18.
Have you set the correct operating program?
For settings, see page 23.
Have you set the required time program?
For settings, see page 19.
The heating of your rooms can be split over several
heating circuits if necessary.
In the case of heating systems with several heating
circuits, for all central heating settings, first select the
heating circuit for which you want to make a change.
This selection is not available in heating systems
with only one heating circuit.
The heating circuits are marked at the factory as
“Heating circuit 1” (HC1) and “Heating circuit 2”
(HC2).
Example:
“Heating circuit 1” is the heating circuit for the
rooms occupied by you.
“Heating circuit 2” is the heating circuit for the
rooms of a separate apartment.
If you or your heating contractor have renamed the
heating circuits (as “Apartment” for example), that title
is then displayed instead of “Heating circuit 1” (see
page 36).

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18
Central Heating
Setting the Room Temperature
You can set the standard room temperature (for day)
and the reduced room temperature (for night) for the
relevant heating circuit.
Setting the standard room temperature for standard
heating mode
Press the following keys in the standard menu:
1.
|/~to select “Heating”
2. dto confirm.
3. to select “Heating circuit 1” (HC1), “Heating
circuit 2” (HC2), “Heating circuit 3” (HC3) or
“Heating circuit 4” (HC4).
4.
|/~for “Set room temp”.
5. dto confirm.
6.
|/~for the required temperature.
7. dto confirm.
“Adopted” appears briefly in the dialogue line of the
display.
8. until the default display is shown.
Set the room temperature for reduced heating mode
(night setback)
Press the following keys:
1. for “Extended menu”.
2. |/~to select “Heating”.
3. dto confirm.
4. to select “Heating circuit 1” (HC1), “Heating
circuit 2” (HC2), “Heating circuit 3” (HC3) or “Heating
circuit 4” (HC4).
5. |/~for “Set red room temp”.
6. dto confirm.
7. |/~for the required temperature.
8. dto confirm.
“Adopted” appears briefly in the dialogue line of the
display.
9. until the default display is shown.

19
5790 982 - 02
Vitoligno 300-C Operating Central Heating
Setting the Operating Program
Check if “Heating” is set for the relevant heating circuit.
Press the following keys in the standard menu:
1. |/~for “Heating”
2. dto confirm.
3. to select “Heating circuit 1” (HC1), “Heating
circuit 2” (HC2), “Heating circuit 3” (HC3) or
“Heating circuit 4” (HC4).
4. |/~for “Operating program”.
5. dto confirm.
The check mark must be next to “Heating”.
If not, proceed as follows:
6. |/~for “Heating”.
7. dto confirm.
8. until the default display is shown.
The rooms of the selected heating circuit are heated in
accordance with the room temperature and time program
settings.
Setting a Time Program
The times at which the heating circuit delivers central
heating with standard or reduced room temperature
depends on the setting of the switching times for the
relevant day (4 possible time phases).
If one or more time phases are set, central heating
with standard room temperature is active during
those times.
If no time phases are set, central heating is carried
out to the reduced room temperature for the whole
day.
Press the following keys:
1. for “Extended menu”.
2. |/~to select “Heating”.
3. dto confirm.
4. to select “Heating circuit 1” (HC1), “Heating
circuit 2” (HC2), “Heating circuit 3” (HC3) or
“Heating circuit 4” (HC4).
5. |/~for “Heating time program”.
6. dto confirm.
7. |/~for adjusting the required time. (see sections
below)
8. until the default display is shown.

Vitoligno 300-C Operating
5790 982 - 02
20
Central Heating
Setting a Time Program (continued)
For central heating, up to 4 changes between standard
and reduced room temperature can be programmed
per day (4 time phases).
At the factory, time phase !is set for every day
from 6:00 am to 10:00 pm (06:00 to 22:00 h).
During that time, all rooms are heated to the standard
room temperature.
You can set switching times individually for the
following days or parts of the week:
– Same for all days of the week: Monday to Sunday
– For individual parts of the week: Monday to Friday
and Saturday to Sunday
– For each day individually: Monday, Tuesday, etc.
When setting switching times, note that your heating
system requires some time to heat the interior to the
required temperature.
For the steps to set switching times.
For the steps to delete a time phase, see page 21.
Note: For the period between the specified switching
times, the relevant heating circuit is regulated to
the standard room temperature.
Setting switching times
Press the following keys:
1. for “Extended menu”.
2. |/~to select “Heating”.
3. to select “Heating circuit 1” (HC1), “Heating
circuit 2” (HC2), “Heating circuit 3” (HC3) or
“Heating circuit 4” (HC4).
4. |/~for “Heating time program”.
5. dto confirm.
Note: If you want to terminate the set switching
times prematurely, press äuntil the default
display is shown (see page 12).
6. |/~until the required part of the week or day
appears.
7. dto confirm.
8. |/~to select the time phase.
The relevant time phase is represented by
a number (!, ?, §or $).
9. dto confirm.
10. |/~for the start point of the time phase.
11. dto confirm.
12. |/~for the end point of the time phase.
13. dto confirm.
14. To adjust the beginning and end of additional time
phases, proceed as described in steps 9 to 14.
15. until the default display is shown.