Viessmann Vitoligno 250-S Operating instructions

Installation and service instructions
for contractors
Viesmann
Vitoligno 250-S
Type SH20
Wood gasification boiler
for logs with a length of 50 cm or 100 cm
VITOLIGNO 250-S
5684984 GB 5/2020 Please keep safe.

2
Please follow these safety instruc-
tions 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 environmen-
tal pollution.
Note
Details identified by the word "Note"
contain additional information.
Target group
These instructions are exclusively inten-
ded for qualified contractors.
■Work on electrical equipment may only
be carried out by a qualified electrician.
■The system must be commissioned by
the system installer or a qualified per-
son authorised by the installer.
Regulations to be observed
■National installation regulations
■Statutory regulations for the prevention
of accidents
■Statutory regulations for environmental
protection
■Codes of practice of the relevant trade
associations
■Relevant country-specific safety regu-
lations
Safety instructions for working on the system
Working on the system
■Isolate the system from the power sup-
ply (e.g. by removing the separate fuse
or by means of a mains isolator) and
check that it is no longer live.
■Safeguard the system against recon-
nection.
Danger
Hot surfaces can cause burns.
■Before maintenance and service
work, switch OFF the appliance
and let it cool down.
■Never touch hot surfaces on the
boiler, burner, flue system or pipe-
work.
Safety instructions
Safety instructions
5684984

3
!Please note
Electronic assemblies can be dam-
aged by electrostatic discharge.
Prior to commencing any work,
touch earthed objects such as heat-
ing or water pipes to discharge
static loads.
Repair work
!Please note
Repairing components that fulfil a
safety function can compromise the
safe operation of the system.
Replace faulty components only
with genuine Viessmann spare
parts.
Auxiliary components, spare and
wearing parts
!Please note
Spare and wearing parts that have
not been tested together with the
system can compromise its func-
tion. Installing non-authorised com-
ponents and making non-approved
modifications or conversions can
compromise safety and may invalid-
ate our warranty.
For replacements, use only original
spare parts supplied or approved by
Viessmann.
Safety instructions for operating the system
If you smell flue gas
Danger
Flue gas can lead to life threatening
poisoning.
■Shut down the heating system.
■Ventilate the installation site.
■Close the doors to living spaces to
prevent flue gases from spread-
ing.
What to do if water escapes from the
appliance
Danger
If water escapes from the appliance
there is a risk of electric shock.
Switch OFF the heating system at
the external isolator (e.g. fuse box,
domestic distribution board).
Danger
If water escapes from the appliance
there is a risk of scalding.
Never touch hot heating water.
Flue systems and combustion air
Ensure that flue systems are clear and
cannot be sealed, for instance due to
accumulation of condensate or other
external causes. Ensure an adequate
supply of combustion air.
Instruct system users that subsequent
modifications to the building characteris-
tics are not permissible (e.g. cable/pipe-
work routing, cladding or partitions).
Danger
Leaking or blocked flue systems, or
an inadequate supply of combus-
tion air can cause life threatening
poisoning from carbon monoxide in
the flue gas.
Ensure the flue system is in good
working order. Vents for supplying
combustion air must be non-seala-
ble.
Safety instructions
Safety instructions (cont.)
5684984

4
Extractors
Operating appliances that extract air to
the outside (extractor hoods, extractors,
air conditioning units, etc.) can create
negative pressure. If the boiler is oper-
ated at the same time, this can lead to a
reverse flow of flue gas.
Danger
The simultaneous operation of the
boiler and appliances that extract
air to the outside can result in life
threatening poisoning due to a
reverse flow of flue gas.
Fit an interlock circuit or take suita-
ble steps to ensure an adequate
supply of combustion air.
Safety instructions
Safety instructions (cont.)
5684984

5
1. Safety and liability Occupational safety ............................................................................... 8
2. Information Disposal of packaging ............................................................................ 9
Symbols ................................................................................................. 9
Intended use .......................................................................................... 9
Product information ................................................................................ 10
■Product description ............................................................................. 10
System examples .................................................................................. 10
Spare parts lists ..................................................................................... 10
3. Preparing for installation Minimum clearances .............................................................................. 11
Siting ...................................................................................................... 11
4. Installation sequence Installing the fan, capacity 40 to 75 kW ................................................. 12
Installing the fan, capacity 85 to 170 kW ............................................... 12
Connections on the flue gas side ........................................................... 13
Hydraulic connections ............................................................................ 14
■Boiler connections .............................................................................. 14
Electrical connections ............................................................................ 15
■Overview of upper connector strip ...................................................... 15
■Overview of lower connector strip ...................................................... 16
■Electrical connection ........................................................................... 16
Electrical connection, extension kit for heating circuit with mixer .......... 20
■Overview of connections .................................................................... 20
■Required settings ................................................................................ 20
Other electrical connections .................................................................. 21
Power supply ......................................................................................... 21
■Regulations ......................................................................................... 21
■Plug fÖ: Power supply ........................................................................ 22
Fitting the cleaning tool mounting bracket ............................................. 22
5. Commissioning, inspec-
tion, maintenance
Steps - commissioning, inspection and maintenance ............................ 23
6. Coding levels Calling up coding level 1 ........................................................................ 35
Calling up coding level 2 ........................................................................ 35
7. Code 1 Overview ................................................................................................ 36
General group ........................................................................................ 36
■Coding ................................................................................................ 36
Hardware group ..................................................................................... 36
■Coding ................................................................................................ 36
Heating group ........................................................................................ 37
■Coding ................................................................................................ 37
Boiler group ........................................................................................... 40
■Coding ................................................................................................ 40
Buffer cylinder group .............................................................................. 41
■Coding ................................................................................................ 41
DHW group ............................................................................................ 41
■Coding ................................................................................................ 41
Additional heat generator group ............................................................ 41
■Coding ................................................................................................ 42
8. Code 2 Overview ................................................................................................ 44
General group ........................................................................................ 44
■Coding ................................................................................................ 44
Heating group ........................................................................................ 44
■Coding ................................................................................................ 44
Boiler group ........................................................................................... 46
■Coding ................................................................................................ 46
Index
Index
5684984

6
Buffer cylinder group .............................................................................. 47
■Coding ................................................................................................ 47
DHW group ............................................................................................ 47
■Coding ................................................................................................ 47
9. Diagnosis and service
scans
Service functions ................................................................................... 48
■Calling up the service menu ............................................................... 48
■Exiting the service menu .................................................................... 48
Diagnosis ............................................................................................... 48
■Diagnosis: General sub-menu ............................................................ 48
■Diagnosis: Boiler sub-menu ................................................................ 49
■Diagnosis: Heating sub-menu ............................................................ 49
■Diagnosis: DHW sub-menu ................................................................ 49
■Diagnosis: KM BUS sub-menu ........................................................... 49
Calling up operating conditions and sensors ......................................... 50
10. Troubleshooting Fault display ........................................................................................... 51
■Checking and acknowledging faults ................................................... 51
■Calling up acknowledged fault messages .......................................... 51
■Plain text fault display ......................................................................... 51
■Calling up fault codes from the fault memory (fault history) ............... 51
■Deleting the fault codes from the fault memory .................................. 52
■Fault codes ......................................................................................... 52
11. Maintenance Fuse ....................................................................................................... 55
Battery ................................................................................................... 55
High limit safety cut-out (STB) ............................................................... 55
■Triggering the function ........................................................................ 55
■Cancelling the function ....................................................................... 55
Sensors .................................................................................................. 56
■Connection ......................................................................................... 56
Carrying out an actuator test ................................................................. 56
Checking sensors .................................................................................. 57
Lambda probe ........................................................................................ 58
■Connection ......................................................................................... 58
■Specification ....................................................................................... 58
12. Extension kit for heating
circuit with mixer
Extension kit components ...................................................................... 59
Specification .......................................................................................... 59
Mixer motor ............................................................................................ 60
■Changing the rotational direction (if required) .................................... 60
13. Connection and wiring dia-
gram
PCB KSK 2.01b ..................................................................................... 61
Connections ........................................................................................... 62
■230 V connection ................................................................................ 62
■LV connection ..................................................................................... 63
230 V plugs ............................................................................................ 64
■Plug fA ............................................................................................... 64
■Plug aBA ............................................................................................. 64
■Plug X1 ............................................................................................... 65
■Plug aBÖ ............................................................................................. 66
LV plugs ................................................................................................. 66
■Plug a:K: Lambda probe .................................................................... 66
■Plug ?: Flow temperature sensor ..................................................... 67
■Plug aJ: Return temperature sensor .................................................. 67
■Plug !, aG and aNL ........................................................................... 67
■Plug ): Buffer cylinder sensor .......................................................... 68
■Plug aVG: KM BUS .............................................................................. 68
■Plug X15: CAN BUS ........................................................................... 69
■Plug a¢ÖA: Fan ................................................................................... 69
Index
Index
5684984

7
■Plug s¢D: Primary air damper ............................................................. 70
■Plug s¢F: Secondary air damper ........................................................ 70
14. Commissioning/service
reports
................................................................................................................ 71
15. Specification ................................................................................................................ 72
16. Decommissioning and dis-
posal
Final decommissioning and disposal ..................................................... 75
17. Certificates Declaration of conformity ....................................................................... 76
18. Keyword index ................................................................................................................ 77
Index
Index (cont.)
5684984

8
Danger
Fire from apertures and hot surfaces can cause
dangerous injuries.
■Apertures secured with screws must not be
opened during heating operation.
■Only open the boiler after it has cooled down.
■Wear personal protective equipment.
Danger
During maintenance and cleaning work and
when handling the ash pan there is a risk of fire
and burns due to hot components and ash.
■Wear suitable safety gloves.
■Only dispose of the ash in fireproof containers
with covers.
Note
Before restarting the system, all opened covers and
flaps on the boiler must be closed again.
Safety and liability
Occupational safety
5684984
Information

9
Please dispose of packaging waste in line with statu-
tory regulations.
Symbols
Symbol Meaning
Reference to other document containing
further information
1.
Step in a diagram:
The numbers correspond to the order in
which the steps are carried out.
Warning of material losses and environ-
mental pollution
Live electrical area
Pay particular attention.
■Component must audibly click into place.
or
■Acoustic signal
■Fit new component.
or
■In conjunction with a tool: Clean the sur-
face.
Dispose of component correctly.
Dispose of component at a suitable collec-
tion point. Do not dispose of component in
domestic waste.
The steps in connection with commissioning, inspec-
tion and maintenance are found in the "Commission-
ing, inspection and maintenance" section and identified
as follows:
Symbol Meaning
Steps required during commissioning
Not required during commissioning
Steps required during inspection
Not required during inspection
Steps required during maintenance
Not required during maintenance
Intended use
The appliance is only intended to be installed and
operated in sealed unvented heating systems that
comply with EN 12828, with due attention paid to the
associated installation, service and operating instruc-
tions. It is only designed for the heating of heating
water that is of potable water quality.
Intended use presupposes that a fixed installation in
conjunction with permissible, system-specific compo-
nents has been carried out.
Commercial or industrial usage for a purpose other
than heating the building or DHW shall be deemed
inappropriate.
Any usage beyond this must be approved by the man-
ufacturer in each individual case.
Information
Disposal of packaging
5684984
Information

10
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 lia-
bility. 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.
Product information
Product description
The Vitoligno 250-S is a boiler for the combustion of
logs. Charging from the top offers easy handling, con-
trol via the Lambda probe guarantees low emissions
and the integral heat management ensures maximum
convenience.
For product dimensions and component designations,
see page 73.
System examples
Available system examples: See www.viessmann-
schemes.com.
Spare parts lists
Information about spare parts can be found at
www.viessmann.com/etapp or in the Viessmann
spare part app.
Information
Intended use (cont.)
5684984
Information

11
Clearances are shown in the figure on page 73. The
specified wall clearances are required for installation
and maintenance work and must therefore be
observed.
Siting
Observe the following points with regard to siting:
■No air contamination by halogenated hydrocarbons
(e.g. as contained in sprays, paints, solvents and
cleaning agents)
■No high accumulation of dust
■No high levels of humidity
■Free from frost and well ventilated
Preparing for installation
Minimum clearances
5684984
Installation

12
1.
Fig. 1
Note
Fan and casing are supplied ready assembled.
Secure the fan to the projecting flue outlet using
screws.
Installing the fan, capacity 85 to 170 kW
A
2.
1.
B
Fig. 2
Note
Position the intake connector such that female connec-
tions A are pointing towards plugs B.
1. Push the fan onto the casing and loosely secure
with nuts.
2. Secure the cable conduit with a screw.
3. Tighten the nuts.
Installation sequence
Installing the fan, capacity 40 to 75 kW
5684984
Installation

13
Note
We recommend you install a flexible connection piece in the flue pipe. This avoids the transmission of sound
caused by the flue gas fan.
Never brick the flue pipe into the chimney.
Note
We recommend installing a draught limiter in the chim-
ney wall.
A
B
Fig. 3
AThermal insulation
BFlexible flue inlet
1. Route the flue pipe to the chimney with a rise
(min. 45°).
Max. flue pipe length: 3000 mm
Flue pipe (internal diameter)
40 - 100 kW 7 200 mm
120 - 170 kW 7 250 mm
2. The entire flue pipe with cleaning aperture must be
gas-tight.
3. Thermally insulate the flue pipe with fireproof insu-
lation, minimum thickness 30 mm.
Note
If condensate is likely to form inside the chimney, we
recommend you push the flue several centimetres into
the chimney, ensuring the required minimum cross-
section of the chimney is maintained.
Installation sequence
Connections on the flue gas side
5684984
Installation

14
Boiler connections
A B C D E
F
G
H
K
Fig. 4
ABoiler return
BBoiler flow
CThermally activated safety valve, safety heat
exchanger installed in the boiler
DSensor, thermally activated safety valve
EThermally activated safety valve
FParticle filter
GCheck valve
HPressure reducer
KCold water connection
Connections
Output kW 40 - 75 85 - 170
Flow DN 32 40
R 1 ¼" 1 ½"
Return DN 32 40
R 1 ¼" 1 ½"
Cold water supply On site, in fixed metal pipe
2.5 to 3.5 bar (0.25 to 0.35 MPa)
DN 15 15
R ½" ½"
Cold water outlet On site R ¾" ¾"
Installation sequence
Hydraulic connections
5684984
Installation

15
Overview of upper connector strip
145
21 22 23 L2
PE
N
L1 L3
182
L1
PE
N
29
179
L1
PE
N N
PE
L1
40
181
L1 PE N
L2
T1
T2 S3
B4
9
M
1~
CAN
230V/50Hz 6A
Y1Y2N Y1Y2N
Pt1000
N
13
14
11
12
11
12
Pt1000
N
Pt1000
N
A B CDF
EG
Fig. 5 Overview of electrical connections, upper plug-in strip
APlug aVG: KM BUS
BPlug a;S: Valve of return temperature raising facility
CPlug sL: Boiler circuit pump
DPlug aML: Enable additional boiler, enable oil/gas burner
EPlug fÖ: Power supply
FPlug a;A: Buffer cylinder control valve
GPlug ): Buffer cylinder sensors (from left to right: bottom, centre, top)
Installation sequence
Electrical connections
5684984
Installation

16
Overview of lower connector strip
Pt1000 Pt1000
R
W
B
21
22 23
1
21 22 23
146
21 22 23
15
21 22 23
100A
S3
T2 T1
L1
PE
N
100
50A
M
1~
L
N
+-
ΘΘ
A B C D E F
Fig. 6 Overview of electrical connections, lower plug-in strip
APlug !: Outside temperature sensor
BPlug aVH: N/A
CPlug aG: Flue gas temperature sensor
DPlug a¢ÖA: Hall sensor, flue gas fan
EPlug gÖA: External fault message
FPlug a¢Ö: Flue gas fan
Electrical connection
Plug aVG: KM BUS for extension kits
21
22
23
KM-
BUS
145
Fig. 7
For extension kit installation:
Extension kit installation instructions
For mixer module settings:
See page 20.
Installation sequence
Electrical connections (cont.)
5684984
Installation

17
Plug a;S: Valve of return temperature raising facility
L2
PE
N
L1
L3
Y1
Y2
N
182
Fig. 8 Max. 0.5 A
Plug sL: Boiler circuit pump
L1
PE
N
M
1~
29
Fig. 9 Max. 2 A
Plug aML: Oil/gas burner enable
L1
PE
N
13
14
11
12
11
12
179
A
Fig. 10 Max. 2 A
Plug aML: Additional boiler enable
L1
PE
N
179
A
L1
Fig. 11 Max. 2 A
ABoiler enable
Installation sequence
Electrical connections (cont.)
5684984
Installation

18
Plug a;A: Buffer cylinder control valve
L1
PE
N
L2
Y1
Y2
N
181
Fig. 12 Max. 0.5 A
Plug ): Buffer cylinder sensor
T1
T2
S3
B4
N
N
N
A
B
C
9
Fig. 13
ABuffer cylinder sensor, bottom (Pt1000)
BBuffer cylinder sensor, centre (Pt1000)
CBuffer cylinder sensor, top (Pt1000)
Plug !: Outside temperature sensor
21
22
23
N
1
A
Fig. 14
APt1000
Installation sequence
Electrical connections (cont.)
5684984
Installation

19
Plugs aG and a¢ÖA: Flue gas temperature sensor
21
22
23
21
22
23
N
15
100A
A
Fig. 15
APt1000
Plug gÖA: External fault message
NL
A
S3
T2
T1
50A
Fig. 16 230 V/max. 4 A
AAlarm (e.g. horn)
Plug a¢Ö: Flue gas fan
L1
PE
N
M
1~
100
Fig. 17
Installation sequence
Electrical connections (cont.)
5684984
Installation

20
Overview of connections
52 20 40A 40
20 40A 40
2
145
145 17
S1 F1
Fig. 18
S1 Rotary selector
F1 MCB/fuse
230 V~ plug
sÖ Pump
fÖ Power supply 230 V/50 Hz
fÖAPower supply for accessories
gS Mixer motor
Note
Note the DHW sensor connections! Part number of the
sensor required for plug aJ: 7438702
Sensor connections for one heating circuit:
?Flow temperature sensor
Sensor connections for DHW heating:
?DHW return sensor
aJ DHW sensor
Required settings
2
3
4
5
6
1
0
9
8
7
A
Fig. 19
ARotary selector extension kit
Number Setting at...
HC DHW Extension kit
1
Extension kit
2
Extension kit
3
0 1 1 (DHW) - -
1 0 1 (HC) - -
Installation sequence
Electrical connection, extension kit for heating circuit with mixer
5684984
Installation