Buderus Logano plus SB745 Manuel utilisateur

For users

Read carefully before use

Operating instructions Floor standing

condensing boiler

Logano plus SB745

6 720 648 053-00.2T

Output range 800 – 1200 kW

6 720 800 395 (2012/03) GB

Introduction

Logano plus SB745 - Subject to technical modifications

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

Contents

Logano plus SB745 - Subject to technical modifications 3

Contents

1 Key to symbols and safety instructions . . . . . 4

1.1 Key to symbols . . . . . . . . . . . . . . . . . . . . . . . 4

1.2 Safety instructions . . . . . . . . . . . . . . . . . . . . 5

2 About the boiler . . . . . . . . . . . . . . . . . . . . . . . . . 6

2.1 Correct use . . . . . . . . . . . . . . . . . . . . . . . . . 6

2.2 CE Declaration of Conformity . . . . . . . . . . . 6

2.3 Suitable fuels . . . . . . . . . . . . . . . . . . . . . . . . 6

2.4 Data plate . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2.5 Product description . . . . . . . . . . . . . . . . . . . 6

3 Information on installation and operation . . 8

3.1 Combustion air quality . . . . . . . . . . . . . . . . . 8

3.2 Heating water quality . . . . . . . . . . . . . . . . . . 8

4 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . 8

4.1 Preparing the heating system for

operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

4.2 Commissioning the control unit

and burner . . . . . . . . . . . . . . . . . . . . . . . . . . 8

5 Shutting down . . . . . . . . . . . . . . . . . . . . . . . . . . 9

5.1 Shutting down the heating system . . . . . . . 9

5.2 Shutting down the heating system in

an emergency . . . . . . . . . . . . . . . . . . . . . . . 9

6 Correcting a burner fault . . . . . . . . . . . . . . . . . 9

7 Inspection and maintenance . . . . . . . . . . . . . 10

7.1 General notes . . . . . . . . . . . . . . . . . . . . . . 10

7.2 Why is regular maintenance important? . 10

7.3 Checking and correcting the

water pressure . . . . . . . . . . . . . . . . . . . . . 10

7.3.1 When should you check the water

pressure in the heating system? . . . . . . . 10

7.3.2 Sealed unvented systems . . . . . . . . . . . . . 11

7.3.3 Installations with automatic

pressurisation units . . . . . . . . . . . . . . . . . . 11

8 Energy saving information . . . . . . . . . . . . . . . 12

9 Environmental protection/disposal . . . . . . . 13

10 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

1Key to symbols and safety instructions

Logano plus SB745 - Subject to technical modifications

1 Key to symbols and safety instructions

1.1 Key to symbols

Warnings

Keywords indicate the seriousness of the hazard in terms

of the consequences of not following the safety

instructions.

•NOTICE indicates that material damage may occur.

•CAUTION indicates that minor to medium injury may

occur.

•WARNING indicates that serious injury may occur.

•DANGER indicates possible risk to life.

Important information

Additional symbols

Warnings in this document are framed and

identified by a warning triangle which is

printed on a grey background.

Electrical hazards are identified by a lightning

symbol surrounded by a warning triangle.

Important information in cases where there is

no risk of personal injury or material losses is

identified by the symbol shown on the left. It

is bordered by horizontal lines above and

below the text.

Symbol Meaning

Ba step in an action sequence

Æa reference to a related part in the

document or to other related documents

• a list entry

–a list entry (second level)

Tab. 1

Key to symbols and safety instructions

Logano plus SB745 - Subject to technical modifications 5

1.2 Safety instructions

Danger through failure to consider your own safety

in an emergency such as a fire

BNever put your life at risk. Your own safety is

paramount.

If you smell gas

Bclose the gas tap.

BOpen the windows.

BNever operate electrical switches, including

telephones, plugs or door-bells.

BExtinguish all naked flames.

BNo open fire.

BNever smoke.

BNever use lighters.

BWarn all occupants of the building, but do not ring

doorbells.

BLeave the building and telephone your gas supply utility

and authorised contractor from an outside phone.

If you smell exhaust gas

BSwitch off the appliance.

BOpen windows and doors.

BNotify an authorised contractor.

Electric shock hazard

BBefore carrying out any work on the heating system,

disconnect it 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.

BSafeguard the heating system against unintentional

reconnection.

BAdhere to country-specific rules and regulations when

making the electrical connection, commissioning,

servicing and carrying out maintenance.

Siting, conversion

An insufficient supply of air can result in dangerous

escape of flue gas.

BOnly have the boiler installed or modified by a

competent person.

BNever change any parts in contact with flue gas.

BNever cover or reduce the size of air vents in doors,

windows or walls. If draught-proof windows are fitted,

ensure there is an adequate supply of ventilation and

combustion air.

BEnsure that the boiler installation room remains free

from the risk of frost.

BThe heating system must be installed and operated in

accordance with the applicable codes of practice as

well as national, regional and local code.

Thermal disinfection

BRisk of scalding!

Monitor any operation with temperatures in excess of

60 °C.

Inspection and maintenance

BRecommendation for customers: Arrange a

maintenance and inspection contract with an

authorised contractor, covering an annual inspection

and responsive maintenance.

BThe user is responsible for the general and

environmental safety of the heating system.

BImmediately correct all faults to prevent system

damage.

BUse only original, 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

BNever use or store highly flammable materials (paper,

thinners, paints etc.) near the boiler.

Combustion/ambient air

BKeep the combustion/ambient air free of corrosive

substances (e.g. halogenated hydrocarbons that

contain chlorine or fluorine compounds). This will help

prevent corrosion.

BKeep the combustion air supply free of dust.

Disposal

BDispose of packaging in an environmentally

responsible manner.

2About the boiler

Logano plus SB745 - Subject to technical modifications

2 About the boiler

2.1 Correct use

The Logano plus SB745 condensing boiler has been

designed for hot water heating systems in e.g. multiple

dwelling units or for industrial use.

Any gas burner to EN 676 and EN 267 can be used if its

operating range matches the boiler specification.

Only burners that have been tested and approved for

electromagnetic compatibility (EMC) may be used.

Logamatic 4000 control units are used with these boilers.

For further details on correct use Æchapter 2.3,

chapter 2.5 and chapter 3, page 8.

2.2 CE Declaration of Conformity

The design and operation of this product conform to the

applicable European directives and supplementary

national requirements. Conformity has been

demonstrated.

The Declaration of Conformity can be viewed at

www.buderus.de or alternatively can be requested from

your local Buderus sales office.

2.3 Suitable fuels

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.

The boiler must only be operated with the specified fuels.

Only burners that are suitable for the specified fuels may

be used.

Observe the manufacturer's burner selection list and the

burner manufacturer's instructions.

2.4 Data plate

The data plate is fitted to the back of the boiler casing.

There you will find information such as the serial number,

output and approval details.

2.5 Product description

The Logano plus SB745 is a floor standing condensing

boiler with a slim, compact design and a small footprint

thanks to the combustion chamber located at the top and

the condensation heating surface located at the bottom.

It is referred to in this manual as the SB745 or the boiler.

The SB745 has two thermo-hydraulically separated return

connections for the high and low temperature circuits.

For the type-tested boiler sizes with internal condensing

heat exchanger and CE designation, the components that

come into contact with hot gas and condensate are made

of stainless steel.

Equip the SB745 with a suitable burner.

Optional accessories can be found in the general

catalogue.

The combustion of biogas is not permitted.

If you contact the manufacturer with any

questions about this product, always provide

the details on the data plate. These details

enable us to assist you specifically and

quickly.

NOTICE: System damage through incorrect

burner.

BOnly use burners which meet the

technical boiler requirements.

About the boiler

Logano plus SB745 - Subject to technical modifications 7

The main SB745 components are (Æfig. 1):

• Boiler body [1] in conjunction with a burner.

The boiler block transfers the heat generated by the

burner to the heating water.

• Thermally insulating casing.

The boiler jacket and thermal insulation reduce heat

losses.

• Control unit (accessory – [8]).

The control unit monitors and controls all electrical

boiler components.

Fig. 1 Boiler overview

1Boiler body

2Combustion chamber door

3Safety lug to secure the load during transportation

(not for lifting)

4Flue gas collector

5Condensate drain, siphon

6Drain

7Base frame rail

8Control unit (accessory)

9Cable conduit

10 Flue gas connection

11 Inspection opening, reversing chamber

12 Return 1 (RK1), low temperature return

(main return)

13 Return 2 (RK2), high temperature return

14 Inspection opening on the water side (both sides)

15 Flow safety connection

16 Boiler flow

17 Valve manifold (accessory)

18 Lifting eyes

6 720 648 053-13.2T

13 1412

3Information on installation and operation

Logano plus SB745 - Subject to technical modifications

3 Information on installation

and operation

3.1 Combustion air quality

BKeep the supply of combustion air free of corrosive

substances (e.g. halogenated hydrocarbons that

contain chlorine or fluorine compounds).

This will help prevent corrosion.

BNever 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.

BKeep the combustion air supply free of dust.

BIf 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 essential for

increased efficiency, functional reliability, long service life

and for maintaining the constant operational condition of

a heating 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 obstruct 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 body) 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.

The conditions for boilers > 600 kW require general

water treatment independent of the water hardness and

the volume of fill and top-up water.

4 Commissioning

BAsk your contractor to provide information about how

the boiler works and is operated.

BNever 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:

BCheck that the required operating pressure has been

built.

BCheck the flange connections and other connections

for tightness.

BFill the condensate siphon.

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.

BUse the control unit to commission the boiler.

For the installation and operation of the

heating system, observe all country-specific

standards and guidelines.

The information on the data plate is binding

and must be observed.

Open the automatic air vent valve only briefly

for ventilation.

Shutting down

Logano plus SB745 - Subject to technical modifications 9

5 Shutting down

5.1 Shutting down the heating system

Shut down your heating system via the control unit.

Switching off the control unit automatically also switches

off the burner.

BSet the On/Off switch of the control unit to "0" (Off).

BIsolate the fuel supply to the burner.

5.2 Shutting down the heating system in

an emergency

BIn 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.

BIsolate the fuel supply to the burner.

BNever 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

service instructions of the relevant control unit. In addition,

burner faults are signalled by an indicator on the burner.

BPress burner reset button (see burner operating

instructions).

If the burner still fails to start after three attempts, contact

a contractor.

NOTICE: Risk of system damage through

frost.

When there is a frost, the heating system can

freeze up if it is not operational, e.g. because

of a fault shutdown.

BWhen there is a risk of frost, protect your

heating system against freezing up.

BIf 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: Risk of system damage through

frost.

The heating system can freeze up as a result

of a power failure or if the power has been

switched off.

BCheck 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: Risk of system damage through

frost.

When there is a frost, the heating system can

freeze up if it is not operational, e.g. because

of a fault shutdown.

BIf 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 the reset

button being pressed too frequently.

This can damage the burner ignition

transformer.

BPress the reset button no more than three

times in a row.

7Inspection and maintenance

Logano plus SB745 - Subject to technical modifications

7 Inspection and maintenance

7.1 General notes

Enter into an annual inspection and responsive

maintenance and inspection contract with your

contractor.

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

safeguard its correct function.

BIf the water pressure in the heating system is too low,

top up with water.

BCheck 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 installation

engineer when the system was first commissioned.

NOTICE: System damage due to inadequate

cleaning and maintenance.

BCarry out cleaning and maintenance

procedures annually. In the course of this

work, check the entire heating system

including the neutralising system for

correct function.

BImmediately correct all faults to prevent

system damage.

Use only original, genuine spare parts from

the manufacturer. Spare parts can be

ordered from the manufacturer's spare parts

catalogue.

Annual inspection and service are part of the

warranty terms.

The fill and top-up water quality must comply

with the specification in the boiler log

supplied.

Air pockets may form in the heating system

through the fill or top-up water releasing

gases.

BVent the heating system (e.g. by bleeding

the radiators).

BIf required, top up with water.

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