Buderus Logano GB125 Installation And Maintenance Instructions Manual

Brand: Buderus

Model: Logano GB125

Category: Heat pumps

Type: Installation And Maintenance Instructions Manual

Installation and

maintenance

instructions

Oil condensing boilers

Logano GB125 with

Logatop

BE burner

6 720 646 462 (03/2007)

SY/JO/LB/IL/PS/SA/AE/OM/QA/BH/YE/IR/AF/IQ/GE/AZ/AM/KW

For contractors

Read carefully prior

installation and

maintenance.

Contents

Logano GB125 oil condensing boiler - Technical specifications are subject to change without prior notice.

1 Safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.1 About these instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.2 Correct use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.3 Symbol key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.4 Please observe these safety instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.4.1 Installation tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.4.2 Tips on the boiler room. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.5 Tools, materials and auxiliary equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.6 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2 Product description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3 Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.1 Specification for boilers with integral oil burners . . . . . . . . . . . . . . . . . . . . . . . . 8

3.2 Declaration of Conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.3 Operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.3.1 General operating conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.3.2 Installation room and environmental conditions . . . . . . . . . . . . . . . . . . . . . . . . . 11

3.3.3 Combustion air supply conditions (open flue operation) . . . . . . . . . . . . . . . . . . . . . 11

3.3.4 Fuel conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.3.5 Mains power supply conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.3.6 Conditions regarding hydraulics and water quality . . . . . . . . . . . . . . . . . . . . . . . . 12

3.4 Balanced flue operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3.5 Open flue operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.5.1 Shaft cross-sections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.6 Test port. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.7 Terminal openings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.8 Installation options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.9 Flue gas systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

3.10 Ventilation air systems (OC

43x

, OC

53x

, OC

63x

, OC

83x

) . . . . . . . . . . . . . . . . . . . 18

3.10.1Silencers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

4 Standard delivery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.1 Boiler with oil burner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.1.1 Standard delivery without flue outlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.1.2 Additional parts of the standard delivery for France, Spain and Portugal . . . . . . . . . . . . 19

5 Transporting the boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

5.1 Reducing the boiler weight for handling purposes . . . . . . . . . . . . . . . . . . . . . . 20

5.2 Lifting and handling the boiler. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

5.3 Transporting the boiler with transport aids . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

6 Positioning the boiler. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

6.1 Wall clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

6.2 Reversing the burner door. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Contents

Logano GB125 oil condensing boiler - Technical specifications are subject to change without prior notice.

6.3 Fitting adjustable feet or a boiler plinth. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

6.3.1 Fitting the adjustable feet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

6.3.2 Fitting the boiler plinth (accessory) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

6.4 Positioning and levelling the boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

7 Installing the boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

7.1 Making the flue connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

7.2 Fit the concentric balanced flue outlet for balanced flue operation (accessory) . . . . . 27

7.3 Making the ventilation air connection for balanced flue operation (OC

53x

, OC

83x

).. . . 28

7.4 Condensate drain. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

7.4.1 Fitting the condensate drain set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

7.5 Making the water connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

7.5.1 Fitting the return connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

7.5.2 Connecting the heating flow and return . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

7.5.3 Connecting the safety flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

7.5.4 Connecting the air vent valve set to the heat exchanger . . . . . . . . . . . . . . . . . . . . . 32

7.5.5 Connecting the DHW cylinder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

7.5.6 Conversion of the factory-fitted extension from VS1 to VS2 . . . . . . . . . . . . . . . . . . . 33

7.5.7 Installing the boiler drain & fill valve (accessory) . . . . . . . . . . . . . . . . . . . . . . . . . 33

7.6 Filling the heating system and checking for leaks . . . . . . . . . . . . . . . . . . . . . . 34

7.7 Making the electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

7.7.1 Connecting the mains power supply and other components . . . . . . . . . . . . . . . . . . . 36

8 Commissioning the heating system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

8.1 Creating operating pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

8.2 Checking the location of the hot gas baffle plates . . . . . . . . . . . . . . . . . . . . . . . 39

8.3 Preparing the heating system for operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

8.4 Switching on the heating system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

8.5 Starting the burner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

8.6 Installing the burner cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

8.7 Setting the programming unit/control unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

8.8 Commissioning report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

9 Operating the Logamatic BC10 base controller . . . . . . . . . . . . . . . . . . . . 43

9.1 Controls on the BC10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

9.2 Switching on and off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

9.2.1 Switching on the heating system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

9.2.2 Shutting down the heating system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

9.3 Maximum boiler temperature for heating mode . . . . . . . . . . . . . . . . . . . . . . . . 44

9.4 Set DHW temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

9.5 Status display and fault diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

9.6 Resetting the service interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

9.7 Burner functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

9.7.1 Resetting all interlocks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

9.7.2 "Burner on" LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

9.8 Carrying out a flue gas test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Contents

Logano GB125 oil condensing boiler - Technical specifications are subject to change without prior notice.

9.9 Selecting manual mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

9.10 Adjusting parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

9.10.1Limiting the heating load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

9.10.2Pump run-on time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

9.10.3DHW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

10 Shutting down the heating system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

10.1 Normal shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

10.2 In an emergency. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

11 Heating system inspection and maintenance . . . . . . . . . . . . . . . . . . . . . 51

11.1 Why is regular maintenance important? . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

11.2 Preparing the boiler for cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

11.3 Cleaning the boiler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

11.3.1Cleaning the boiler with cleaning brushes . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

11.3.2Wet cleaning (chemical cleaning) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

11.4 Cleaning the heat exchanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

11.5 Cleaning the neutralising system and siphon . . . . . . . . . . . . . . . . . . . . . . . . . 56

11.6 Checking the heating system operating pressure. . . . . . . . . . . . . . . . . . . . . . . 57

11.7 Concentric combustion air supply and flue gas pipe . . . . . . . . . . . . . . . . . . . . . 57

11.8 Ventilation air system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

11.9 Inspection and maintenance reports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

12 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

12.1 Identifying and clearing faults. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

13 Sensor curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

14 Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Safety

Logano GB125 oil condensing boiler - Technical specifications are subject to change without prior notice.

1 Safety

1.1 About these instructions

These instructions contain important information regar-

ding the safe and proper installation, commissioning and

maintenance of the boiler.

In the following, the special oil boiler Logano GB125 with

Logatop

BE burner will generally be referred to as the

boiler.

These installation and maintenance instructions are de-

signed for contractors who, due to their training and experi-

ence, are knowledgeable in the handling of heating systems

and oil/gas installations.

1.2 Correct use

The boiler must only be used to heat heating water and

for DHW heating, e.g. for detached houses or apartment

buildings.

If the boiler is used for balanced flue operation, it must

only be operated with the air ventilation systems given

as accessories by Buderus

(Æ Tab. 18 page 18).

Observe the details on the type plate and the specifica-

tions (Æ Chapter 3, page 8) to ensure correct use of this

appliance.

1.3 Symbol key

In these instructions, the following symbols are used:

Æ Cross references

Cross references to a specific point in the document or

to other documents are marked with an arrow

Æ .

1.4 Please observe these safety

instructions

Observe all local regulations and standards during in-

stallation and operation:

• Local building regulations regarding installation,

combustion air supply, flue gas systems and connec

tion to a chimney.

• Latest edition of the IEE Wiring Regulations gover-

ning electrical connection to the mains power supply.

• Regulations and standards regarding the safety

equipment of heating systems.

RISK TO LIFE

Identifies possible risks that may result in

serious injury or death if appropriate care is

not taken.

RISK OF INJURY/

SYSTEM DAMAGE

Identifies potentially dangerous situations,

which might lead to medium or slight inju

ries or to material losses.

USER INFORMATION

User tips for the optimum utilisation and

adjustment of the appliance plus other

useful information.

USER INFORMATION

Only use original Buderus components.

Buderus cannot accept liability for losses

resulting from the use of spare parts not

supplied by Buderus.

RISK TO LIFE

due to neglecting your own safety in emer-

gencies, such as in case of a fire.

B Never risk your own life. Your own safe-

ty is paramount.

Safety

Logano GB125 oil condensing boiler - Technical specifications are subject to change without prior notice.

1.4.1 Installation tips

1.4.2 Tips on the boiler room

1.5 Tools, materials and auxiliary

equipment

The installation and maintenance of this boiler requires

standard tools used for building heating systems and for

oil and water installations.

The following items are also of use:

• Trolley with strap or Buderus boiler trolley

• Cleaning brushes and/or chemical cleaning agent for

wet cleaning

1.6 Disposal

B Dispose of packaging in an environmentally respon-

sible manner.

B Dispose of all heating system components which

must be replaced via an authorised disposal site.

RISK TO LIFE

from electricity.

B Only suitably qualified electricians are

permitted to carry out electrical work.

B Before opening an appliance: Isolate it

across all poles from the mains power

supply and safeguard it against unin

tentional reconnection.

B Observe all installation instructions.

RISK TO LIFE

through poisoning.

An inadequate supply of air can result in

the escape of dangerous flue gas when

using the appliance in open flue mode.

B Ensure that ventilation or extract air

apertures are not reduced or closed.

B The boiler must not be operated until

the obstruction has been removed.

B Inform the system user in writing of the

problem and the associated risk.

RISK OF FIRE

through flammable materials or liquids.

B Ensure that there are no flammable ma-

terials or liquids in the immediate vicini-

ty of the boiler.

RISK TO LIFE

through toxic flue gases.

B Ensure that, when operating the appli-

ance in open flue mode, no mechanical

air extractors, such as cooker hoods,

driers or ventilation appliances, are able

to extract combustion air from the in

stallation location.

RISK TO LIFE

through toxic flue gases.

B Only operate these boilers with a chim-

ney or flue system that provides the re-

quired draught during operation.

Product description

Logano GB125 oil condensing boiler - Technical specifications are subject to change without prior notice.

2 Product description

The boiler is a condensing boiler with oil combustion and

modulating boiler water temperature control that can

operate in open or balanced flue mode. The respective

flue system determines the mode of operation.

The boiler comprises:

• Control unit

• Boiler casing

• Boiler block with thermal insulation

• Boiler door

• Burner

• Heat exchanger system

The control unit monitors and controls all electrical boiler

components.

The boiler shell prevents energy losses and acts as a si-

lencer.

The boiler block transfers the heat generated by the bur-

ner to the heating water. The insulation prevents energy

losses.

Fig. 1 Front view Logano GB125

1 Control unit

2 Boiler casing

3 Boiler door

4 Oil burner

5 Burner cover

6 Heat exchanger system

Fig. 2 Back view Logano GB125

(shown excluding thermal insulation)

1 Heat exchanger system

Specification

Logano GB125 oil condensing boiler - Technical specifications are subject to change without prior notice.

3 Specification

3.1 Specification for boilers with integral oil burners

Fig. 3 Connections and dimensions (dim. in mm)

Connections (for dimensions see the following tables):

VK = Boiler flow VS = DHW cylinder flow

RK = Boiler return RS = DHW cylinder return

EL = Drain (connection for boiler drain & fill valve or expan-

sion vessel)

VSL = Safety line flow (connection for an on-site safety val-

ve, pressure gauge or air vent valve)

Boiler size 18 22 30 35

Rated output (factory setting) (55/30 °C) kW 18.5 22.6 30.3 36.6

Rated output (factory setting) (80/60 °C) kW 17.7 21.8 29.0 35.1

Combustion output kW 18.2 22.4 29.9 36.3

Boiler water content I 35.6 35.6 44.9 44.9

Gas content I 42.9 57.9

Flue gas temperature

(balanced flue) (55/30 °C) °C 49 58 58 66

Flue gas temperature

(balanced flue) (80/60 °C) °C 72 80 80 89

Flue gas mass flow rate kg/s 0.0072 0.0089 0.0119 0.0144

content % 13.5 – 14.0

Required draught Pa 0

Available draught Pa 30 50

Pressure drop on the hot gas side (80/60 °C) mbar 0.14 0.2 0.23 0.35

Pressure drop on the water side (dT = 10 K) mbar 36 54 60 81

Permissible flow temperature

°C 100

Tab. 1 Specification for boilers with integral oil burners

Flue gas temperature according to EN 303.

Safety limit (high limit safety cut-out, STB)

Maximum possible flow temperature = Safety limit (STB) – 18 K

Example: Safety limit (STB) = 100 °C, maximum possible flow temperature = 100 – 18 = 82 °C

The safety limit must meet the relevant national regulations.

Specification

Logano GB125 oil condensing boiler - Technical specifications are subject to change without prior notice.

Boiler size 18 22 30 35

Permissible operating pressure bar 3

Maximum time constant on thermostat s < 1

Maximum time constant of temperature monitor

and high limit safety cut-out (STB)

s < 1.2

Current rating 230 VAC, 50 Hz, 10 A IP 40

Tab. 2 Specification for boilers with integral oil burners

Boiler size 18 22 30 35

Overall boiler length (L) mm 955 955 1075 1075

Length of boiler block (L

mm 656 656 776 776

Combustion chamber length (L

mm 407 407 522 522

Combustion chamber diameter mm 270

Burner door depth mm 60

Section feet clearance (F

) mm 410 410 530 530

Net weight

kg 192 192 228 228

Tab. 3 Dimensions, weight and other details for boilers with integral oil burner

Weight incl. packaging approx. 6 – 8 % heavier.

Country: Germany

Fuel types Fuel oil type EL to DIN 51 603

Comments The boiler may only be operated with the specified fuel.

Country: Austria

Fuels Fuel oil EL

Comments The boiler can only be operated with the specified fuels.

The requirements acc. to Art. 15 a B-VG regarding emissions and efficiency are being met.

Country: Switzerland

Fuel types Fuel oil EL

Comments The boiler may only be operated with the specified fuel.

The output figures shown in the Tab. "Specifications" are nominal output figures.

In practical operation, some values are not reached to ensure the LVR regulations are met within the specified

output range.

Tab. 4 Fuels

All countries

Fuels Fuel oil EL

(Viscosity max. 6.0 mm

/s at 20 °C)

Comments The boiler may only be operated with the specified fuel.

Carry out maintenance and cleaning procedures annually. For this, check the entire system is functioning per-

fectly. Immediately rectify any faults discovered.

Tab. 5 Country-specific fuels and comments

Specification

Logano GB125 oil condensing boiler - Technical specifications are subject to change without prior notice.

3.2 Declaration of Conformity

3.3 Operating conditions

By observing these operating conditions, this boiler will

last for a long time. Some details refer to operation with

Buderus control units only.

3.3.1 General operating conditions

The design and operation of this product

conforms to European Directives and the

supplementary national requirements. Its

conformity is confirmed by the CE marking.

You can view the Declaration of Conformity

on the internet at www.buderus.de/konfo or

request a copy from your local Buderus of

fice.

SYSTEM DAMAGE

Deviations from the stated operating con-

ditions may lead to faults. Severe deviati-

ons may lead to the damage of individual

components or of the boiler.

B Observe the details on the boiler type

plate, which are binding and which

must always be observed.

Operating Conditions

Minimum boiler water tem-

perature

Interruption of operation

(complete boiler shutdown)

Controlling heating circuits

with mixer

Minimum return temperature

In conjunction with control units for modulating boiler water temperatures

No requirement

The Logamatic control unit

safeguards the operating

temperature

Automatic

through the Logamatic

control unit

No requirement

However, preferred for low tem-

perature heating systems, such

as for heating system design

55/45

°C

Required for:

– Underfloor heating systems

– Systems with a large water

content >15 l/kW

No requirement

Tab. 6 General operating conditions

A control unit for heating circuits with mixers improves control characteristics and is particularly recommended for systems with multiple heating

circuits.

Specification

Logano GB125 oil condensing boiler - Technical specifications are subject to change without prior notice.

3.3.2 Installation room and environmental conditions

Operating Conditions Notes – detailed requirements

Temperature in the boiler room +5 to +40 °C

Relative humidity Max. 90 % No condensation or dripping damp inside the boiler room

Dust/airborne seeds – Excessive dust must be prevented inside the boiler room when the boiler is

operating, e.g.:

– Building dust through very dusty building work

The supply of combustion air must not contain excessive amounts of dust

or airborne seeds; if necessary, entry should be prevented with air filters,

e.g.:

– Air supply loaded with dust from dirt roads and paths.

– Air supply loaded with dust from production and processing facilities, e.g.

quarries, mines, etc.

– Airborne seeds from composite plants.

Halogenated hydrocarbon

compounds

– The combustion air must be free from halogenated hydrocarbon com-

pounds.

– Identify the source of halogenated hydrocarbon compounds and eliminate

their ingress. Where this is impossible, route combustion air from areas which

are not contaminated by halogenated hydrocarbon compounds.

Observe the following:

– Buderus catalogue - Heating Technology Germany

– Worksheet K 3 in the Buderus catalogue

Fans which extract air from the

boiler room.

– During burner operation, no mechanical air handling equipment may be operated

which could extract combustion air from the boiler room, e.g.:

– Cooker hood

–Dryer

– Ventilation equipment

Small animals – Prevent small animals from entering the boiler room, particularly through the ven-

tilation air apertures, by fitting the vents with grilles.

Fire safety – Maintain clearances between the boiler and flammable materials in accordance

with local regulations. Generally, maintain a minimum clearance of 40 cm. Never

store flammable materials or liquids in the vicinity of the boiler.

Flooding – If there is a serious risk of flooding, disconnect the boiler in good time from its fuel

and power supply before water enters the room. Any general and burner compo-

nents or control equipment, which come into contact with water, must be replaced

before re-commissioning.

Tab. 7 Boiler room and environment

3.3.3 Combustion air supply conditions (open flue operation)

Operating Conditions Boiler output (for

multi-boiler systems = total output)

Ventilation air cross-section in cm

(unrestricted aperture)

Ventilation air cross-section for

combustion air from outside for

open flue operation (split over

no more than 2

vents)

< 50 kW min. 150 cm

> 50 kW min. 150 cm

plus 2 cm

for each kW

in excess of 50 kW

Tab. 8 Observe country-specific requirements for open flue operation.

For balanced flue operation Æ Chapter 3.8, page 15

Specification

Logano GB125 oil condensing boiler - Technical specifications are subject to change without prior notice.

3.3.4 Fuel conditions

3.3.5 Mains power supply conditions

Operating Conditions Notes – detailed requirements

Permissible fuels for boilers

with Logatop oil burner

– Boilers with integral oil burner must only be operated with fuel oil. The kinematic

viscosity of the oil must not exceed 6 mm

/s (at 20 °C). This is equivalent to a

Redwood I viscosity of 41.0 s (UK) or Sayboldt viscosity of 45.5 s (USA).

Reduce the maintenance/cleaning interval accordingly if fuel oil of poor quality is

used.

Contamination – Technically free of contaminants (such as, for example, dust, water vapour, li-

quids), i.e. the constant operation will not result in deposits that may lead to a re-

striction of cross-section in valves, sieves and filters.

Tab. 9Fuels

Operating Conditions Notes – detailed requirements

Power supply voltage 195 – 253 V Observe the voltage range of the burner and control unit used. The outer

casing/boiler must be earthed for safety reasons and to function correctly.

Fuse 10 A

Frequency 47.5 – 52.5 Hz Sine wave

IP rating IP40 (protected against ingress of foreign bodies > 1 mm dia.; no protection against

water ingress)

Tab. 10 Mains power supply

3.3.6 Conditions regarding hydraulics and water quality

Operating Conditions Notes – detailed requirements

Operating pressure 0.5 – 3.0 bar

Permissible test pressure 1.0 – 3.9 bar

Protection against excess tem-

peratures via TR thermostat

50 – 90 °C

Protection against excess tem-

peratures via high limit safety

cut-out STB

100 °C

Water quality – Only use drinking water to fill and top up the boiler. We recommend a pH value

of 8.2 – 9.5 (observe VDI 2035).

Tab. 11 Hydraulics and water quality

Specification

Logano GB125 oil condensing boiler - Technical specifications are subject to change without prior notice.

3.4 Balanced flue operation

The boiler meets the requirements specified by the ap-

probation principles of the DIBT for balanced flue oil

combustion equipment to EN 15034/15035

(

Æ Chapter 3.2, page 10 "Declaration of Conformity").

The entire system (ventilation air pipe - burner/boiler -

flue gas pipe) corresponds to the types of oil combustion

equipment shown in the table on the right. The additional

designation "x" declares that the combustion equipment

meets the sealing demands and can therefore be opera

ted independently of the equipment and ventilation in the

boiler room.

Observe the country-specific standards and regulations

concerning the operation of balanced flue oil combustion

equipment.

Please ensure that, when connecting the appliance to a

balanced flue system that has not been tested with the

boiler (OC

63x

), the country-specific requirements (parti-

cularly concerning the design of the terminal) and the

specifications of the general building regulations apper

taining to the system are observed.

For the technical details regarding the sizing of the ba-

lanced flue system for OC

63x

, see the adjacent Tab. 13.

Installation

type

Routing combustion air and

flue gas

13x

Concentric combustion air supply and flue gas routing horizontal through the outside wall. The terminals are loca-

ted close beside each other in the same pressure area. Combustion air supply and flue gas routing are part of the

combustion equipment.

33x

Concentric combustion air supply and flue gas routing vertical via roof. The terminals are located close beside

each other in the same pressure area. Combustion air supply and flue gas routing are part of the combustion

equipment.

43x

Connection to air-flue gas system (LAS, simply laid); ventilation air pipe from air shaft and connecting piece for

chimney are part of the combustion equipment.

53x

Separate combustion air supply and flue gas routing (tested together with the boiler). The terminals are located in

different pressure areas. Ventilation air and flue gas pipes are part of the combustion equipment.

Please note: When routing the flue gas horizontally, then the terminals must not be on opposite walls of the buil-

ding.

63x

Designed for the connection to a combustion air supply and flue gas routing system, not tested with the boiler.

83x

Connection to a flue gas system (underpressure operation). Ventilation air pipe and connecting piece to the chim-

ney are part of the combustion equipment.

Tab. 12 Balanced flue installation types

GB125

Residual head Pa 30/50

Max. permiss. inlet pressure

drop on the air inlet

connector

Pa 200

Tab. 13 Design details for OC

63x

Specification

Logano GB125 oil condensing boiler - Technical specifications are subject to change without prior notice.

3.5 Open flue operation

(Installation type B23, B23P, GA or B33, GAX)

For the ventilation of the boiler room, a ventilation aper-

ture to the outside offering a minimum cross-section of

150 cm

must be provided, or there must be an intercon-

nection with other rooms from where combustion air can

be freely drawn.

To minimise the noise development with open flue ope-

ration, pull the ventilation air hose from the burner.

B Install the volume flow terminal in accordance with

the installation instructions for the flue gas system.

3.5.1 Shaft cross-sections

3.6 Test port

Flue gas testing and the determination of the combusti-

on air temperature are restricted to the test ports.

Observe the information in the Logatop BE - RLU oil

burner instructions.

3.7 Terminal openings

If the ventilation air and flue gas system terminals are

beside each other, you must take measures to prevent

flue gases being drawn in again. You must keep to the

requirements of DIN 18160-1 (in particular those relating

to terminal design), as well as the requirements relating

to general building regulations approval for that system.

In addition, rainwater must not get into the ventilation air

pipe.

Please speak to your local flue gas inspector should you

have any questions regarding the design of the terminal

openings.

Fig. 4 Shaft cross-sections

DN Fem.

connection

A B

80 95 130 120

110 128 188 168

Tab. 14 Dimensions for Fig. 4 shaft cross-sections

(dim. in mm)

Fig. 5 Fitting balanced flue outlet

1 Ventilation air test port

2 Flue gas test port

Fig. 6 Samples of terminal designs

(dim. in mm)

1 Flue gas

2 Ventilation air

12 12

0.4

USER INFORMATION

Badly designed terminal openings can

lead to unsafe combustion and burner

faults.

Specification

Logano GB125 oil condensing boiler - Technical specifications are subject to change without prior notice.

3.8 Installation options

According to the permitted installation types, the options

shown in the following table for open and balanced flue

boiler installation are available.

Installation type Description

Flue gas routed through

a flue inside a shaft with

secondary ventilation.

23P

Tight against positive

pressure

System like B

with requirement for tightness against positive

pressure

GAX

In conjunction with GAK

open flue concentric air

and flue gas routing.

13x

Concentric ventilation air

and flue gas pipe hori

zontal through the out-

side wall. Terminals

close beside each other

in the same pressure

area

Concentric combustion air and flue gas systems acc. to

Æ Tab. 16, page 17.

33x

Concentric ventilation air

and flue gas routing ver

tical via roof. Terminals

close beside each other

in the same pressure

area.

Concentric combustion air and flue gas systems acc. to

Æ Tab. 16, page 17.

Tab. 15 Installation options

Positive

Specification

Logano GB125 oil condensing boiler - Technical specifications are subject to change without prior notice.

43x

Ventilation air and flue

gas routing via simply

laid LAS in separate

shafts.

Flue gas outlet and ven-

tilation air inlet in the

same pressure area.

Pipes to the end of the chimney present on-site:

– Flue gas pipe according to Æ Chapter 3.9, page 17.

– Ventilation air pipe in separate shaft according to

Æ Chapter 3.10, page 18.

– Terminal openings according to Æ 3.7, page 14.

A LAS chimney (underpressure operation, moisture-resistant)

is available on-site:

– Flue gas connecting piece for chimney according to

Æ Chapter 3.9, page 17.

– Ventilation air pipe in separate shaft according to

Æ Chapter 3.10, page 18.

– Terminal openings according to Æ Chapter 3.7, page 14.

A LAS chimney with country-specific approval, approved ter-

minal design and ceramic inner tube is available on-site:

– Flue gas connecting piece for LAS according to

Æ Chapter 3.9, page 17.

– Ventilation air connecting piece for LAS according to

Æ Chapter 3.10, page 18.

– Terminal openings according to Æ Chapter 3.7, page 14.

53x

Flue outlet and ventilati-

on air inlet in areas with

different pressure.

The flue gas pipe is laid in a shaft available on-site or even out-

side:

– Flue gas pipe according to Æ Chapter 3.9.

– Ventilation air pipe according to Æ Chapter 3.10, page 18.

63x

Flue outlet and ventilati-

on air inlet in areas with

different pressure.

A flue gas pipe is available on site (tight against positive pres-

sure and moisture resistant).

– Flue gas connecting piece according to Æ Chapter 3.9.

– Ventilation air pipe according to Æ Chapter 3.10, page 18.

83x

Flue outlet and ventilati-

on air inlet in areas with

different pressure.

A chimney (underpressure operation, moisture-resistant) is

available on-site:

– Flue gas connecting piece according to Æ Chapter 3.9.

– Ventilation air pipe according to Æ Chapter 3.10, page 18.

Installation type Description

Tab. 15 Installation options

Negative

pressure

Positive pressureNegative pressure

Specification

Logano GB125 oil condensing boiler - Technical specifications are subject to change without prior notice.

3.9 Flue gas systems

The condensing boiler must only be combined with ap-

proved flue systems (Æ Tab. 16) that meet the following

requirements:

• country-specific approval

• suitable for fuel oil EL

• suitable for at least 120 °C flue gas temperature

• moisture-resistant

• tight against positive pressure

For the maximum flue length, see our catalogue or cal-

culate in accordance with EN 13384. The available

draught can be found in the specification

(Æ Chapter 3,

page 8).

You must provide a function test certificate in accor-

dance with the standards and guidelines applicable in

your country.

For installation types OC

33x

and OC

53x

, Buderus offers

the balanced flue systems listed at

Æ Tab. 16 (LAS sys-

tems). The maximum lengths listed in Æ Tab. 17 can be

achieved with the basic modules and the relevant exten-

sion components.

Should different details apply to your chosen system,

provide a function verification for your balanced flue sys

tem in accordance with the country-specific standards

and directives.

Approved types

of installation

Approved

flue gas systems

13x

, OC

33x

Ubbink ROLUX FIOUL

Poujoulat Dualis FIOUL

Centrotherm DO-S

Centrotherm GA-K

33x

InterActive DO-S

InterActive GA-K

43x

InterActive LAS-K

43x

, OC

53x

, OC

63x

, OC

83x

Buderus Logafix DD

Raab BW/DW

SUR KS-RESOPLAN Type C

Centrotherm GAF-K

53x

Interactive GAF-K

Centrotherm GAF-K

Ubbink ROLUX FIOUL

Poujoulat Dualis FIOUL

Tab. 16 Approved types of installation and flue gas systems

Specification

Logano GB125 oil condensing boiler - Technical specifications are subject to change without prior notice.

3.10 Ventilation air systems (OC

43x

, OC

53x

, OC

63x

, OC

83x

)

Only Buderus ventilation air systems listed in the table

on the right are approved (including a combination of

both systems).

The permissible length of the ventilation air system for

the plastic DN60 system is reduced by

•1.0 m per 45° bend

•1.5 m per 90° bend

•4 m per 1 m air hose (in combinations)

•15 m when using a silencer

The maximum available negative pressure at the boiler

inlet hose is 200

Pa.

3.10.1 Silencers

If the ventilation air is drawn in via an outer wall connec-

tion, then the use of a silencer is strongly recommended.

If the ventilation air is drawn in via the roof, the silencer

may be dispensed with.

Balanced flue operation - maximum flue length (m)

flue system, plastic DN 80/125

Boiler size

33x

53x

43x

GA-K and

DO/DO-S

GAF-K Combustion air pipe via outer

wall, LAS ventilation shaft

Variant 1 Variant 2 Variant 1 Variant 2

according to

EN 13 364-1

GB125 18 5.0 11.5 11.5 21.5 20.1

22 5.0 15.5 15.5 25.0 24.9

30 5.0 19.5 18.0 20.5 18.0

35 5.0 21.5 20.0 22.4 20.1

Open flue operation - maximum flue length (m)

flue system, plastic DN 80/125

Boiler size

23x

GA GN

Variant 1 Variant 2

according to

EN 13 384-1

GB125 18 25.0 25.0

22 25.0 25.0

30 19.5 18.0

35 21.5 20.0

Tab. 17 Maximum flue length

Variant 1: Chimney entry: 1 bend, connection piece L=1.5 m

Variant 2: Chimney entry: 1 bend, connection piece L=1.5 m, 1 90° bend, 1 tee

Maximum length from

boiler rear panel

Air hose Santo SL DN 63

Flexible air hose, 4 m long, incl. hose

connector

and 2 special hose clips

Plastic plug-in system DN60

Straight pieces 250, 250

, 500,

1000, 1500, 2000

mm long, 45° and

90° bends plus silencers1 are avai

lable

Tab. 18 Approved ventilation air systems

(Buderus accessory)

with test port

incl. silencer max. 4 m

Standard delivery

Logano GB125 oil condensing boiler - Technical specifications are subject to change without prior notice.

4 Standard delivery

B After delivery, check all packaging is in perfect

condition.

B Check all components have been delivered.

4.1 Boiler with oil burner

4.1.1 Standard delivery without flue outlet

Components on pallet.

Component underneath the burner cover.

Buderus supplies the boiler support as an accessory.

Component Pce Packaging

Boiler block 1 1 pallet

Boiler casing, fitted to the boiler

block at the factory

Burner cover, fitted to the boiler

block at the factory

Heat exchanger system

Oil burner fitted to the burner

door at the factory

Control unit

Cover panel

Adjustable feet

4 1 x foil

packaging

Return connector

Siphon

1 1 x foil

packaging

Technical documentation 1 x foil

packaging

Tab. 19 Standard delivery

4.1.2 Additional parts of the standard delivery for France, Spain and Portugal

Component Pce Packaging

Concentric flue outlet 1 1 x foil

packaging

Tab. 20 Additional parts of the standard delivery

Transporting the boiler

Logano GB125 oil condensing boiler - Technical specifications are subject to change without prior notice.

5 Transporting the boiler

This chapter details how to safely transport the boiler.

5.1 Reducing the boiler weight for handling purposes

If required, you can reduce the weight of the boiler by re-

moving the burner cover and door.

B Remove the burner cover screws.

B Slightly lift the burner cover and remove forward.

B Remove mains plug, communication and sensor ca-

ble from SAFe. In balanced flue operation, detach

combustion air hose as well (

Æ burner documentati-

on).

SYSTEM DAMAGE

through impact.

B Please observe the handling refe-

rences on the packaging to protect

components susceptible to impact da

mage.

USER INFORMATION

B Protect connectors against contamina-

tion if the boiler is not immediately ta-

ken into use.

USER INFORMATION

Dispose of packaging in an environmental-

ly responsible manner.

RISK OF INJURY

from being inadequately secured during

transport.

B Use only suitable means of transportati-

on, e.g. sack trolley with strap, stair trol-

ley or step trolley.

B Secure the load against falling.

Fig. 7 Removing the burner cover

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Buderus Logano GB125 Installation And Maintenance Instructions Manual

Brand: Buderus

Model: Logano GB125

Category: Heat pumps

Type: Installation And Maintenance Instructions Manual

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Buderus Logano GB125 Installation And Maintenance Instructions Manual

Buderus Logano GB125 Installation And Maintenance Instructions Manual

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