Buderus Logano plus SB325 Instruction Manual

Read carefully before use.
Operating instructions for users
Floor standing
condensing boiler
Logano plus SB325
6 720 804 354-00.1ITL
6 720 806 353 (2012/07) GB

Introduction
Logano plus SB325 – 6 720 806 353 (2012/07)
2
Introduction
Dear Customer,
Heat is our element - and has been now for more than 275 years.
Right from the start, we invest all our energies and passion into
developing individual solutions for you, so you feel comfortable in
your home.
Whether heat, domestic hot water or ventilation, a product from
Buderus will always provide you with highly efficient heating technology
of proven quality that will reliably keep your home cosy for many years
to come.
We manufacture in accordance with the state of the art and ensure that
our products are efficiently matched to each other. In this endeavour,
efficiency and environmental compatibility are our priorities.
Thank you for choosing a Buderus product - a choice that will give you
not only efficient energy utilisation but also high levels of comfort and
convenience. To ensure that you retain this level of excellence, please
read the operating instructions carefully. If, contrary to expectations,
problems arise, please contact your installer who will be happy to
assist you.
Should your installer not be available, then contact our customer
service that is available to you around the clock.
We hope you will enjoy your new Buderus product!
Your Buderus Team
Table of contents
1 General safety instructions and explanation of symbols . . . . 3
1.1 Key to symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2 Safety regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 About the appliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1 Determined use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.2 EU Declaration of Conformity . . . . . . . . . . . . . . . . . . . . . . 4
2.3 Operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.4 Suitable fuels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.5 Data plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.6 Product description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3 Information on installation and operation . . . . . . . . . . . . . . . . 6
3.1 Combustion air quality . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.2 Heating water quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.3 Using antifreeze . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.1 Preparing the heating system for operation . . . . . . . . . . 6
4.2 Commissioning the control unit and burner . . . . . . . . . . 6
5 De-commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5.1 Shutting down the heating system . . . . . . . . . . . . . . . . . . 7
5.2 Shutting down the heating system in an emergency . . . 7
6 Correcting a burner fault . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
7 Inspection and service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
7.1 General notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
7.2 Why is regular maintenance important? . . . . . . . . . . . . . 8
7.3 Checking and correcting the water pressure . . . . . . . . . 8
7.3.1 When should you check the water pressure in the
heating system? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
7.3.2 Sealed unvented systems . . . . . . . . . . . . . . . . . . . . . . . . . 8
7.3.3 Installations with automatic pressurisation units . . . . . . 8
8 Energy saving tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
9 Environmental protection/disposal . . . . . . . . . . . . . . . . . . . . . 10
10 General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

1General safety instructions and explanation of symbols
Logano plus SB325 – 6 720 806 353 (2012/07) 3
1 General safety instructions and explanation
of symbols
1.1 Key to symbols
Warnings
The following keywords are defined and can be used in this document:
•NOTICE indicates a situation that could result in damage to property
or equipment.
•CAUTION indicates a situation that could result in minor to medium
injury.
•WARNING indicates a situation that could result in severe injury or
death.
•DANGER indicates a situation that will result in severe injury or death.
Important information
Additional symbols
1.2 Safety regulations
Danger through failure to consider your own safety in an emergency
such as a fire
▶ Never put your life at risk. Your own safety is paramount.
Installation and conversion
Insufficient ventilation can lead to dangerous flue gas leaks.
▶ Only have the boiler installed or modified by a qualified heating
engineer.
▶ Never change any parts in contact with flue gas.
▶ Never cover or reduce the size of air vents in doors, windows or walls.
If draught-proof windows are fitted, ensure there is an adequate
combustion air supply.
▶ Ensure that the boiler installation room remains free from the risk of
frost.
▶ The heating system must be installed and operated in accordance
with the current applicable standards, rules and regulations.
Risk of damage due to operator error
Operator errors can result in injury and damage to property.
▶ Ensure that children never access this appliance unsupervised or play
with it.
▶ Ensure that only personnel who are trained to operate this appliance
correctly have access to it.
If you smell gas
▶ Close the gas isolation valve.
▶ Open the windows.
▶ Never operate electrical switches, including telephones, plugs or
doorbells.
▶ Extinguish all naked flames.
▶Noopenfire.
▶ Never smoke.
▶ Never use lighters.
▶ Warn all occupants of the building, but do not ring doorbells.
▶ Leave the building and telephone the national gas emergency service
on 0800 111999 from an outside phone.
If you smell flue gas
▶ Switch off the appliance.
▶ Open windows and doors.
▶ Notify an authorised contractor.
Electric shock hazard
▶ Before carrying out any work on the heating system, disconnect the
heating system from the power supply across all poles. For example,
activate the emergency stop switch outside the boiler room. It is not
enough to switch off the control unit.
▶ Secure power supply against unintentional reconnection.
▶ Observe country-specific rules and regulations when making the
electrical connection, commissioning, servicing and carrying out
maintenance.
Thermal disinfection
▶Risk of scalding!
Monitor any operation with temperatures in excess of 60 °C.
Warnings in this document are identified by a warning
triangle printed against a grey background.
Keywords at the start of a warning indicate the type and
seriousness of the ensuing risk if measures to prevent
the risk are not taken.
This symbol indicates important information where
there is no risk to people or property.
Symbol Meaning
▶ Action step
Cross-reference to another part of this document
• List/list entry
Table 1

2About the appliance
Logano plus SB325 – 6 720 806 353 (2012/07)
4
Inspection and service
▶Recommendation for customers: Arrange a service and inspection
contract with the service department of the manufacturer or with an
authorised contractor, covering an annual inspection and demand-
dependent service.
▶ The user is responsible for the general and environmental safety of
the heating system.
▶ Immediately correct all faults to prevent system damage!
▶ Use only genuine spare parts from the manufacturer. Losses caused
by the use of spare parts and accessories not supplied by the
manufacturer are excluded from the manufacturer's warranty.
Explosive and highly flammable material
▶ Never use or store highly flammable materials (paper, thinners, paints
etc.) near the boiler.
Combustion/room air
▶ Keep the combustion/ambient air free of corrosive substances
(e.g. halogenated hydrocarbons that contain chlorine or fluorine
compounds). This will help prevent corrosion.
▶ Keep the combustion air supply free of dust.
Disposal
▶ Dispose of packaging in an environmentally responsible manner.
2 About the appliance
2.1 Determined use
The Logano plus SB325 condensing boiler has been designed for hot
water heating systems in e.g. apartment buildings or industrial units.
The boiler is only approved for open flue operation.
Any pressure-jet gas burner type-tested to EN 676 can be used if its
operating range matches the boiler specifications.
Only burners that have been tested and approved for electromagnetic
compatibility (EMC) may be used.
2.2 EU Declaration of Conformity
The design and operation of this product conform to the applicable
European directives and supplementary national requirements.
Conformity has been demonstrated.
You can ask for a copy of the declaration of conformity for this product.
For this see the contact address on the back of these instructions.
2.3 Operating conditions
Observe all standards and directives applicable to the
installation and operation of this heating system in your
country. Observe the information on the data plate.
These are definitive and must be observed.
Set the burner to the rated heat input QN specified on
the data plate as a maximum.
Conditions of use Unit Value
Maximum permissible temperature,
high-limit safety cut-out
°C 110
Maximum operating pressure bar 4
Maximum number of burner starts per annum 15 000
Table 2 Conditions of use
Operating conditions Logano plus SB325 Logano plus SB325
Boiler water flow rate None –
in conjunction with a
Logamatic control unit
for modulating
operation.
None –
in conjunction with a
Logamatic control unit
4212 for constant
boiler water
temperatures or when
supplemented by a
third party control
unit.
Min. boiler water
temperature
Operating Interruption
(complete boiler shut-down)
Heating system control
with mixer
Minimum return
temperature
Miscellaneous 1)2)
1) Maximum 15,000 burner starts per year. In order not to exceed the number of
burner starts, observe the information on setting the control unit and burner in the
technical guide or installation instructions. If this value is exceeded, however,
please contact the manufacturer's service department.
2) The number of burner starts per year is affected by the boiler system's operating
settings (controller parameters in the boiler controller and combustion setting)
and sizing to correspond with the consumers' heat demand. To avoid exceeding
the number of annual burner starts as a result of operating settings which have not
been optimised, the manufacturer offers a complete commissioning and regular
document inspections for floor standing residential conventional boilers, burners
and boiler controller (Logamatic control units with function modules).
1)
Table 3 Operating conditions

2About the appliance
Logano plus SB325 – 6 720 806 353 (2012/07) 5
2.4 Suitable fuels
The boiler must only be operated with the specified fuels. Only burners
that are suitable for the specified fuels may be used.
Your heating contractor has entered the required type of fuel in tab. 4,
chapter 10, page 10.
Gas burner
Permissible fuels:
• Natural gas from the public gas supply in accordance with national
regulations with a total sulphur content < 50 mg/m3.
• LPG in accordance with national regulations with a content of
elementary sulphur <1.5 ppm and volatile sulphur <50 ppm.
2.5 Data plate
The data plate includes details of the serial number, output and approval
data.
2.6 Product description
With the Logano plus SB325 floor standing condensing boilers, all parts
that come into contact with products of combustion or condensate are
made from high grade stainless steel. This makes operation possible
without limitations on the flow and return temperature, the flow rate or
the burner low load. It is also referred to in this manual as the boiler or
the heat appliance.
The SB325 has two separate thermohydraulic return connections for
the high and low temperature heating circuits. The SB325 must be
equipped with a burner that is suitable for the boiler. The boiler
functions according to the three-pass system (Fig. 1).
The main components of the boiler are (Fig. 2, page 5):
• Boiler body [3] in conjunction with a burner [2]
The boiler block transfers the heat produced by the burner to the
heating water.
• Thermally insulating casing [3]
The boiler shell and thermal insulation reduce energy losses.
• Control unit [1]
The control unit monitors and controls all electrical boiler
components.
Fig. 1 Function diagram of the hot gas path in the floor standing
condensing boiler Logano plus SB325
[AA] Flue gas outlet
[RK1] Return connection for low temperature heating circuits
[RK2] Return connection for high temperature heating circuits
[VK] Flow connection
[1] Combustion chamber (1st pass)
[2] Upper condensation secondary heating surface
(condensing plus heating surface, 2nd pass)
[3] Water guide element
[4] Lower condensation secondary heating surface
(condensing plus heating surface, 3rd pass)
Fig. 2 Boiler overview
[1] Control unit
[2] Burner
[3] Boiler shell with insulation and boiler casing
The number of burner starts can be checked in the MEC
on the third-party control unit or alternatively on the
burner control unit.
The combustion of biogas is not permitted.
If you contact the manufacturerwithany questionsabout
this product, always provide the details on the data
plate. These details enable us to assist you specifically
and quickly.
The information on the data plate is binding and must be
observed!
2
4
3
1
AA
RK1
VK
RK2
6 720 642 881-05.1il
6 720 804 353-01.1ITL
2
3
1

3Information on installation and operation
Logano plus SB325 – 6 720 806 353 (2012/07)
6
3 Information on installation and operation
3.1 Combustion air quality
▶ Keep the supply of combustion air free of corrosive substances (e.g.
halogenated hydrocarbons that contain chlorine or fluorine
compounds).
This will help to prevent corrosion.
▶ Never use or store chlorinated cleaning agents or halogenated
hydrocarbons (as contained in spray cans, solvents or cleaning
agents, paints and adhesives, for example) in the boiler room.
▶ Keep the combustion air supply free of dust.
▶ If building work is taking place in the installation room and creating a
lot of dust, shut the boiler down. A burner contaminated during
building work must be cleaned before commissioning.
3.2 Heating water quality
The quality of the fill and top-up water is an essential factor for
efficiency, functional reliability, long service life and for maintaining the
constant operational condition of aheating system. If the system is filled
with water that has a high calcium hardness, this will be deposited on the
heat exchanger surfaces and will restrict the transfer of heat to the
heating water. As a result, the wall temperatures of the stainless steel
heat exchanger surfaces will rise and the thermal stresses (loads on the
boiler shell) will increase.
This is why the quality of the fill or top-up water must meet the conditions
stipulated in the operator's log provided and be recorded in this log.
3.3 Using antifreeze
Antifreeze based on glycol has been used in heating systems for many
years, for example Antifrogen N manufactured by Clariant.
The use of other types of antifreeze should not be a cause for concern if
the product is comparable with Antifrogen N.
Observe the antifreeze manufacturer's instructions. Follow the
manufacturer's details regarding mixing ratios.
The specific thermal capacity of Antifrogen N antifreeze islower than the
specific thermal capacity of water. To enable the transfer of the required
heat output, increase the required flow rate accordingly. This should
also be taken into account when sizing the system components (e.g.
pumps) and the pipework.
As the heat transfer medium has a higher viscosity and density than
water, take the higher pressure drop through the pipework and other
system components into account.
Check the resistance of all plastic or non-metallic components in the
system separately.
4 Commissioning
▶ Ask your contractor to provide information about how the boiler
works and is operated.
▶ Never undertake any modifications or maintenance.
4.1 Preparing the heating system for operation
For you to be able to commission the heating system, observe the
following:
▶ Check that the required operating pressure has been built
(chapter 7.3).
▶ Check the flange connections and other connections for tightness.
▶ Fill the condensate siphon.
▶ Open the fuel supply to the main fuel shut-off valve.
▶ Switch on the heating system emergency stop switch.
4.2 Commissioning the control unit and burner
By commissioning the control unit you automatically commission the
burner as well. The burner can then be started by the control unit. For
further information, see the installation instructions of the relevant
control unit or burner.
▶ Use the control unit to commission the boiler.
Observe all standards and guidelines applicable to the
installation and operation of this system in your country.
The details on the data plate are definitive and must be
observed.
Chemical additives that are not certified as harmless by
the manufacturer must not be used.
Open the automatic air vent valve only briefly for venting.

5De-commissioning
Logano plus SB325 – 6 720 806 353 (2012/07) 7
5 De-commissioning
5.1 Shutting down the heating system
Shut down your heating system via the control unit. This also switches
the burner off automatically.
▶ Set the On/Off switch of the control unit to "0" (Off).
▶ Isolate the fuel supply to the burner.
5.2 Shutting down the heating system in an emergency
▶ In dangerous situations, immediately close the main fuel shut-off
valve and the power supply of the heating system via the boiler room
main MCB/fuse or the heating system emergency stop switch.
▶ Isolate the fuel supply to the burner.
▶ Never put your life at risk. Your own safety is paramount.
6 Correcting a burner fault
The display shows heating system faults. Further information on the
fault displays can be found in the operating instructions of the relevant
control unit. In addition, burner faults are signalled by an indicator on the
burner.
▶ Press burner reset button (see burner operating instructions).
If the burner still fails to start after three attempts, contact a contractor.
NOTICE: System damage due to frost.
At temperatures below freezing the heating system can
freeze up if it is not operational, e.g. because of a fault
shutdown.
▶ When there is risk of frost, protect your heating
system against freezing.
▶ If your heating system has been shut down for several
days due to a fault shutdown and there is a risk of
frost, drain the heating water at the drain & fill valve.
Also leave the air vent valve at the highest point in the
system open.
NOTICE: System damage due to frost.
The heating system can freeze up as a result of a power
failure or if the power has been switched off.
▶ Check the "Control unit settings" to ensure the system
remains operational (especially when there is a risk of
frost).
Only in emergencies, switch OFF the heating system via
the boiler room MCB/fuse or the heating system
emergency stop switch.
NOTICE: System damage due to frost.
When there is a frost, the heating system can freeze up if
it is not operational, e.g. because of a fault shutdown.
▶ At temperatures below freezing protect your heating
system against freezing up.
▶ If your heating system has been shut down for several
days due to a fault shutdown and there is a risk of
frost, drain the heating water at the drain & fill valve.
Also leave the air vent valve at the highest point in the
system open.
NOTICE: System damage from pressing the reset button
too frequently.
This can damage the burner ignition transformer.
▶ Press the reset button no more than three times in
sequence.

7Inspection and service
Logano plus SB325 – 6 720 806 353 (2012/07)
8
7 Inspection and service
7.1 General notes
Arrange an annual inspection and responsive maintenance and
inspection contract with the service department of the manufacturer or
with your contractor.
The manufacturer's address can be found on the last page.
7.2 Why is regular maintenance important?
Have your heating system regularly serviced:
• to maintain a high level of efficiency and to operate the system
economically (low fuel consumption),
• to achieve a high level of operational reliability,
• to maintain the cleanest possible combustion
7.3 Checking and correcting the water pressure
The heating system must contain sufficient water to ensure its correct
function.
▶ If the water pressure in the heating system is too low, top up with
water.
▶ Check the water pressure monthly.
7.3.1 When should you check the water pressure in the heating
system?
Recently added fill or top-up water loses much of its volume in the first
few days because it releases gases. With new systems you should
therefore initially check the heating water pressure on a daily basis, and
then at gradually longer intervals.
• Once the heating system is hardly losing any volume, check the
heating water pressure monthly.
A distinction is generally made between open vented and sealed
unvented systems. In practice, open vented systems are rarely installed
nowadays. We will therefore be using a sealed unvented heating system
to demonstrate how you can check the water pressure. All settings will
have already been made by the contractor when the system was first
commissioned.
7.3.2 Sealed unvented systems
For sealed unvented systems, the pressure gauge needle [3] must be
within the green band [2]. The red needle [1] of the pressure gauge
must be set to the pressure required for the heating system.
▶ Checking the heating system water pressure.
▶ Top up the heating water if the pressure gauge needle [3] drops below
the green band [2].
▶ Top-up with water via the filling facility.
▶ Vent the heating system.
▶ Check the water pressure once more.
Fig. 3 Manometer for sealed unvented heating systems
[1] Red needle
[2] Green marking
[3] Manometer needle
7.3.3 Installations with automatic pressurisation units
For installations in which an automatic pressurisation unit is integrated,
observe the manufacturer's instructions.
The water quality requirements also apply here (see operator's log).
NOTICE: System damage due to inadequate cleaning
and maintenance.
▶ Carry out cleaning and maintenance at least once a
year. In the course of this work, check the entire
heating system including the neutralising system for
correct function.
▶ Immediately correct all faults to prevent system
damage.
Annual inspection and service are part of the warranty
terms.
Use only genuine spare parts from the manufacturer.
Spare parts can be ordered from the manufacturer's
spare parts catalogue.
The fill and top-up water quality must comply with the
specifications in the operator's log supplied.
Air pockets may form in the heating system through the
fill or top-up water releasing gases.
▶ Vent the heating system (e.g. bleeding the radiators).
▶ If required, top up with water.
NOTICE: System damage due to frequent topping up!
Subject to the water quality, your heating system can be
damaged through corrosion or scaling.
▶ Ensure that the heating system is vented correctly.
▶ Check the heating system for leaks and the expansion
vessel for functionality.
▶ Observe the requirements regarding water quality
(see operator's log).
▶ If water loss occurs frequently, locate the cause and
rectify the problem without delay.
NOTICE: System damage due to temperature stresses!
▶ Only fill the heating system when cold (the flow
temperature must not exceed 40 °C).
▶ During operation, only fill the heating system via the
fill valve in the heating system pipework (return).
6 720 648 053-30.1T
1
3
2

8Energy saving tips
Logano plus SB325 – 6 720 806 353 (2012/07) 9
8 Energy saving tips
Economy mode
The appliance has been designed, so that the gas consumption and
environmental impact are as low as possible yet comfort is at its
optimum level.
Inspection/Maintenance
So that gas consumption and environmental impact can be kept as low
as possible for as long as possible, we recommend that you take out a
maintenance and inspection contract with the service department of the
manufacturer or with a qualified contractor covering an annual
inspection and responsive maintenance of the boiler.
Heating controls
We recommend the installation of a heating control unit with room
temperature controller or a weather-compensated controller and
thermostatic valves.
For further information, see the relevant installation and operating
instructions of the controller.
Heating systems with weather-compensated control unit
With this type of control, the outside temperature is captured, and the
heating flow temperature is adjusted in accordance with the heating
curve set at the controller. The lower the outside temperature, the
higher the flow temperature.
Set the heating curve as low as possible. Turn the appliance temperature
controller to the maximum design temperature of the heating system.
Heating systems with room temperature-dependent control
The room where the room temperature controller is installed (lead
room) determines the temperature in other rooms. Thermostatic valves
should not be installed in the lead room.
Set the appliance temperature controller to the maximum design
temperature of the heating system.
In each room (except the lead room), the temperature can be regulated
individually by means of thermostatic valves. If a lower temperature is
required in the lead room than in the other rooms, leave the room
temperature controller set as is and reduce the temperature at the
radiator valve.
Thermostats
Fully open the thermostatic radiator valves in order to achieve the
required room temperature. Change the required room temperature at
the temperature controller only if the temperature is not achieved after
a prolonged period.
Venting
Never leave windows slightly open for ventilation purposes. Otherwise,
heat will be constantly discharged from the room without significantly
improving the room's air. It is better to fully open windows briefly.
Close thermostatic radiator valves whilst airing rooms.
Economy mode (night setback)
Substantial amounts of fuel can be saved by reducing the room
temperature during day or night. Reducing the temperature by 1 K can
save up to 5 % energy. It is not recommended to let the daytime
temperature of heated rooms drop below +15 °C, otherwise the cooled-
down walls would continue to cool down the room. The room
temperature is increased, leading to a higher energy consumption than
if the supply of heat remains constant. In a well insulated building, set
the temperature for economy mode to a low level. Even if the set
economy temperature is never reached, energy will be saved as the
heating system remains switched off. The start of the economy mode
can be set to earlier if necessary.
DHW
Always set the hot water temperature to as low as possible.
A lower setting on the thermostat means a higher rate of energy savings.
Furthermore, higher hot water temperatures result in increased
limescale deposits and thereby impair the function of the appliance (e.g.
longer heating-up times or lower output).
Circulation pump
If necessary, set an existing circulation pump for hot water to your
individual requirements using a timer (e. g. mornings, midday, and
evenings).
Now you know how to heat economically with the heating system.
Contact your installer should you have further questions - alternatively,
write to us.

9Environmental protection/disposal
Logano plus SB325 – 6 720 806 353 (2012/07)
10
9 Environmental protection/disposal
Environmental protection is a key commitment of the Bosch Group.
Quality of products, efficiency and environmental protection are equally
important objectives for us. All legislation pertaining to the environment
is strictly observed. To protect the environment we use the best possible
technology and materials, subject to economic considerations.
Packaging
Where packaging is concerned, we participate in country-specific
recycling processes that ensure optimum recycling. All of our packaging
materials are environmentally compatible and can be recycled.
Obsolete equipment
Old appliances contain materials that should be recycled.
The relevant assemblies are easy to separate, and all plastics are
identified. In this manner the individual components are easily sorted
and added into the recycling and disposal systems.
10 General information
Cleaning the boiler jacket
Wipe down the boiler jacket with a damp cloth. Never use aggressive or
corrosive cleaning agents.
Appliance details
When requesting a customer service visit, it is useful to provide detailed
information about your appliance.
You will find these details on the data plate or the appliance type label
(installation and maintenance instructions).
Gas boiler (e.g. Logano SB325):
...................................................................................................
Serial number: ............................................................................
Commissioningdate:......................................................................
Correct fuel
This heating system requires the correct fuel to ensure perfect
operation. During commissioning, your heating contractor will enter the
correct fuel type for your heating system in the table below.
NOTICE: Risk of system damage through use of
incorrect fuel.
▶ Only use the fuel intended for your heating system.
We recommend you seek the advice of your heating
contractor if you intend to change the fuel for your
heating system.
Use only the following fuel:
Stamp/Signature/Date
Table 4

10
Logano plus SB325 – 6 720 806 353 (2012/07) 11
Notes

Buderus
Cotswold Way, Warndon, Worcester WR4 9SW
All Enquiries: 0844 892 3004
www.buderus.co.uk
In the UK and IE, Buderus is a brand name
of Bosch Thermotechnology Ltd.