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Technical guide

Issue 12/2010

Ecostream cast iron boiler

Logano GE315, GE515 and GE615

Output range

from 86 kW to 1200 kW

Table of contents

6 720 646 864 (12/2010) – Technical guide Logano GE315, GE515 and GE615

2

Table of contents

1 Buderus Ecostream cast iron boiler Logano 4

1.1 Types and output . . . . . . . . . . . . . . . . . . . . . 4

1.2 Possible applications . . . . . . . . . . . . . . . . . . 4

1.3 Benefits of the Ecostream cast iron boilers

Logano GE315, GE515 and GE615 . . . . 4

2 Technical description . . . . . . . . . . . . . . . . . . . . . 5

2.1 Equipment level of the Ecostream cast iron

boilers Logano GE315, GE515 and

GE615 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.2 Thermostream technology of the

Ecostream cast iron boilers . . . . . . . . . . . . 6

2.2.1 Function principle . . . . . . . . . . . . . . . . . . . . . 6

2.2.2 Structural features . . . . . . . . . . . . . . . . . . . . 7

2.3 Dimensions and specification of the

Ecostream cast iron boilers . . . . . . . . . . . . 9

2.3.1 Dimensions of the Logano GE315 cast

iron boilers . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.3.2 Dimensions of the Logano GE515 cast

iron boilers . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.3.3 Specification of the Ecostream cast iron

boilers Logano GE315 . . . . . . . . . . . . . . . . 11

2.3.4 Specification of the Logano GE515 cast

iron boilers . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.3.5 Dimensions and specification of the

Logano GE615 cast iron boilers . . . . . . . . 12

2.4 Parameters of the Ecostream cast iron

boilers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2.4.1 Pressure drop on the water side . . . . . . . . 13

2.4.2 Boiler efficiency . . . . . . . . . . . . . . . . . . . . . 15

2.4.3 Flue gas temperature and boiler efficiency 16

2.4.4 Standby loss and flue gas temperature . . 17

3 Burner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

3.1 Matching pressure-jet oil or gas burners

for cast iron boiler units . . . . . . . . . . . . . . 18

3.2 General requirements . . . . . . . . . . . . . . . . . 18

3.3 Information on burner selection . . . . . . . . . 18

3.4 Available drilled burner plates . . . . . . . . . . 19

4 Regulations and operating conditions . . . . . 21

4.1 Extracts from the regulations . . . . . . . . . . . 21

4.2 Pressure Equipment Directive (PED)

and Health & Safety at Work Act . . . . . . . 22

4.2.1 Application area . . . . . . . . . . . . . . . . . . . . . 22

4.2.2 Boiler classification . . . . . . . . . . . . . . . . . . . 22

4.2.3 Initial and repeat inspections . . . . . . . . . . . 22

4.2.4 Boiler category classification according to

Pressure Equipment Directive 97/23/EC 22

4.2.5 Health & Safety at Work Act regarding

steam and hot water boilers . . . . . . . . . . . 22

4.2.6 Overview of the Health & Safety at Work

Act [Germany] . . . . . . . . . . . . . . . . . . . . . . 22

4.3 Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

4.4 Operating requirements . . . . . . . . . . . . . . . 24

4.4.1 Operating conditions for Ecostream cast

iron boiler Logano GE315 . . . . . . . . . . . . 24

4.4.2 Operating conditions for Ecostream cast

iron boilers Logano GE515 and GE615 24

4.5 Additional operating conditions for

operation with biogas . . . . . . . . . . . . . . . . 25

4.6 Corrosion protection in heating systems 25

4.6.1 Combustion air . . . . . . . . . . . . . . . . . . . . . . 25

4.6.2 Corrosion protection on the boiler water

side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

4.6.3 Prevention of corrosion damage . . . . . . . . 25

4.7 Chemical additives in the heating water . . 26

4.7.1 Using antifreeze . . . . . . . . . . . . . . . . . . . . . . 26

4.8 Guidelines for water quality . . . . . . . . . . . . 26

4.8.1 Validity and purpose . . . . . . . . . . . . . . . . . . 26

4.8.2 Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 27

4.8.3 Scaling in hot water heating systems . . . . 27

4.8.4 Requirements of the fill, top-up and

heating water for boilers made of

ferrous materials . . . . . . . . . . . . . . . . . . . . . 27

4.8.5 System design of hot water heating

systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

4.8.6 Measures on the water side for hot

water heating systems . . . . . . . . . . . . . . . . 28

4.8.7 Operating measures for hot water

heating systems . . . . . . . . . . . . . . . . . . . . . 28

4.8.8 Softening and desalination . . . . . . . . . . . . . 29

4.8.9 Conversions . . . . . . . . . . . . . . . . . . . . . . . . . 29

4.8.10Establishing the volumes of fill and

top-up water . . . . . . . . . . . . . . . . . . . . . . . . 29

4.8.11Operating log . . . . . . . . . . . . . . . . . . . . . . . 29

4.8.12Correction factor . . . . . . . . . . . . . . . . . . . . . 30

5 Heating circuit control . . . . . . . . . . . . . . . . . . . 31

5.1 Control systems . . . . . . . . . . . . . . . . . . . . . 31

5.1.1 Logamatic 4212 control unit . . . . . . . . . . . 31

5.1.2 Logamatic 4311 und 4312 control units 31

5.2 Logamatic telecontrol system . . . . . . . . . . 32

5.2.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

5.2.2 Telecontrol modem for optimum service

connections . . . . . . . . . . . . . . . . . . . . . . . . 34

5.2.3 Logamatic Easycom . . . . . . . . . . . . . . . . . . 34

5.2.4 Logamatic Easycom PRO . . . . . . . . . . . . . 34

5.2.5 Logamatic Service Key . . . . . . . . . . . . . . . . 34

Table of contents

6 720 646 864 (12/2010) – Technical guide Logano GE315, GE515 and GE615

3

6 DHW heating . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

6.1 Systems for DHW heating . . . . . . . . . . . . . 35

6.2 DHW temperature control . . . . . . . . . . . . . . 35

7 Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

7.1 Information regarding all system examples 36

7.1.1 Hydraulic connection . . . . . . . . . . . . . . . . . . 36

7.1.2 Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

7.1.3 DHW heating . . . . . . . . . . . . . . . . . . . . . . . . 37

7.2 Safety equipment to DIN-EN 12828 . . . . . 37

7.2.1 Requirements . . . . . . . . . . . . . . . . . . . . . . . . 37

7.2.2 Low water indicator . . . . . . . . . . . . . . . . . . . 37

7.2.3 Layout of safety components to DIN-

EN 12828; operating temperature

≤ 105 °C; shutdown temperature

(high limit safety cut-out) ≤ 110 °C . . . . . 38

7.2.4 Layout of safety components to

DIN-EN 12953-6;

shutdown temperature (high limit safety

cut-out) > 110 °C . . . . . . . . . . . . . . . . . . . . 39

7.3 Single boiler system with boiler control

and heating circuit control, AC pumps and

operated with oil . . . . . . . . . . . . . . . . . . . . . 40

7.4 Single boiler system with boiler control

and heating circuit control . . . . . . . . . . . . . 42

7.5 Single boiler system with boiler circuit

control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

7.6 2-boiler system with boiler control and

heating circuit control . . . . . . . . . . . . . . . . . 46

7.7 2-boiler system with boiler control and

heating circuit control, plus hydraulic

balancing . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

7.8 2-boiler system with boiler circuit control

and variable speed pumps . . . . . . . . . . . . . 50

7.9 2-boiler system with boiler circuit control 52

7.10 2-boiler system Ecostream cast iron

boiler/gas condensing boiler with boiler

control and heating circuit control . . . . . . . 54

8 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

8.1 Transport and handling . . . . . . . . . . . . . . . . 56

8.1.1 Delivery method . . . . . . . . . . . . . . . . . . . . . . 56

8.1.2 Minimum handling dimensions of

Ecostream cast iron boilers

Logano GE315, GE515 and GE615 . . . . 57

8.2 Installation room conditions . . . . . . . . . . . . 58

8.2.1 Combustion air supply . . . . . . . . . . . . . . . . . 58

8.2.2 Siting combustion equipment . . . . . . . . . . . 58

8.3 Installed dimensions . . . . . . . . . . . . . . . . . . 59

8.4 Information on installation . . . . . . . . . . . . . . 60

8.5 Additionalsafety equipment to

DIN-EN 12828 . . . . . . . . . . . . . . . . . . . . . . 60

8.5.1 Low water indicator to protect against

overheating . . . . . . . . . . . . . . . . . . . . . . . . . 60

8.5.2 Safety equipment . . . . . . . . . . . . . . . . . . . . 61

8.5.3 Boiler safety equipment assembly . . . . . . 62

8.6 Additional devices for sound insulation . . 67

8.6.1 Requirements . . . . . . . . . . . . . . . . . . . . . . . 67

8.6.2 Burner silencer hood . . . . . . . . . . . . . . . . . 67

8.6.3 Flue gas silencer (round) with sealing

collar for structure-borne noise separation 67

8.6.4 Flue gas silencer made of steel/stainless

steel – up to 30 dB(A) . . . . . . . . . . . . . . . 68

8.6.5 Boiler mounts to attenuate

structure-borne noise . . . . . . . . . . . . . . . . 70

8.7 Additional accessories . . . . . . . . . . . . . . . . 71

8.7.1 Welded flanges . . . . . . . . . . . . . . . . . . . . . 71

8.7.2 Flue gas butterfly valve . . . . . . . . . . . . . . . . 71

8.7.3 Flue pipe sealing collar . . . . . . . . . . . . . . . 72

8.7.4 Cleaning equipment set . . . . . . . . . . . . . . . 72

8.7.5 Side control unit retainer . . . . . . . . . . . . . . 72

8.7.6 Compression tools for cast iron boilers . . 72

8.7.7 Installation aid for cast iron boilers . . . . . . 73

9 Flue systems . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

9.1 Requirements . . . . . . . . . . . . . . . . . . . . . . . 74

9.2 Flue gas parameters . . . . . . . . . . . . . . . . . . 75

9.2.1 Ecostream cast iron boiler

Logano GE315 . . . . . . . . . . . . . . . . . . . . . 75

9.2.2 Ecostream cast iron boilers

Logano GE515 and Logano GE615 . . . . 76

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

1 Buderus Ecostream cast iron boiler Logano

6 720 646 864 (12/2010) – Technical guide Logano GE315, GE515 and GE615

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1 Buderus Ecostream cast iron boiler Logano

1.1 Types and output

With the Ecostream cast iron boilers Logano GE315,

GE515 and GE615, Buderus offers sophisticated

solutions for thermostream technology in the output range

from 86 kW to 1200 kW.

As an option, all cast iron boilers can be operated with

matching pressure-jet oil or gas burners. The Ecostream

cast iron boilers Logano GE315 and GE515 are also

available as unit versions with a matching pressure-jet oil

or gas burner.

1.2 Possible applications

The Ecostream cast iron boilers Logano GE315, GE515

and GE615 are suitable for all heating systems to

EN 12828 and EN 12953-6 up to 120 °C.

They are used for a range of purposes, including central

heating and DHW heating in apartment buildings,

municipal buildings and commercial premises.

For DHW heating, these boilers can be combined with

Buderus DHW cylinders.

1.3 Benefits of the Ecostream cast iron

boilers Logano GE315, GE515 and

GE615

Thermostream technology

Thermostream technology achieves increased protection

against condensation and even temperature distribution

in the boiler. It works with any return temperature and

heating water flow rate, however low.

High seasonal efficiency [to DIN]

The heating surfaces designed for optimum efficiency,

combined with the high grade thermal insulation, achieve

excellent heat transfer and low flue gas losses. The result

is standard seasonal efficiency [to DIN] of up to 96 %.

High operational reliability

The required operational reliability and long boiler service

life are the result of high grade material, the optimised

combustion chamber, special flow technology for the

return water and a low temperature drop inside the boiler.

Environmentally responsible with low emissions

Ideal conditions for clean combustion, especially in

conjunction with the matching low emissions burners,

thanks to the 3-pass principle and water-cooled

combustion chamber with direct heating surfaces.

Cost savings

Fuel cost savings as a result of economical low

temperature heating operation with no required low end

temperature for night setback. The cost of investing in and

operating a shunt pump is saved due to thermostream

technology.

Simple system technology

Since there are no special requirements for minimum flow

rate or return temperature, it is simple and straightforward

to connect all Ecostream cast iron boilers to the heating

system. Not only does this lead to reduced investment

outlay and running costs, but also less engineering effort.

Easy installation

The boilers can be installed quickly and easily as the

required connections are prepared at the factory and the

accessories are matched to the boilers. All boilers can be

delivered with a boiler block fitted at the factory. If space

for handling is tight, the cast iron boilers can be

transported in sections and assembled at the installation

site (delivery in loose sections).

Simple maintenance and cleaning

The combustion chamber and heating surfaces of these

boilers are easily accessible via the large door at the front.

They are easy to clean using the cleaning equipment set

(accessory).

Ecostream cast iron boiler unit

The Ecostream cast iron boiler unit and matching burner

significantly reduce the effort required for installing and

adjusting the burner.

2 Technical description

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5

2 Technical description

2.1 Equipment level of the Ecostream

cast iron boilers Logano GE315,

GE515 and GE615

Fig. 1 Ecostream cast iron boiler Logano GE615 with

Logamatic 4311 control unit

The Ecostream cast iron boilers Logano GE315, GE515

and GE615 are tested to EN 303, type-tested and CE-

designated. Quality assurance measures to

DIN ISO 9001 and EN 29001 contribute to the high

manufacturing quality and functional reliability.

All Ecostream cast iron boilers are made from Buderus

special GL 180 M grey cast iron which is resistant to

corrosion and high temperatures. They are designed for

thermostream technology. This is why they are suitable as

low temperature boilers for modulating operation with no

minimum start temperature.

Ecostream cast iron boilers feature all-round thermal

insulation and painted casing (RAL 5015). The thermal

insulation on the Logano GE315 and GE515 cast iron

boilers is 80 mm thick, and on the Logano GE615 cast

iron boilers is 100 mm thick. The combustion chamber

and the secondary heating surfaces are easily accessible

through large front doors that can be pivoted to the left or

right.

The boilers are supplied either in individual sections

(Æ Fig. 41) or as a pre-assembled boiler block.

Finely stepped output levels

The following Ecostream cast iron boilers are available:

• Logano GE315 with output of 86 kW to 230 kW

• Logano GE515 with output of 201 kW to 510 kW

• Logano GE615 with output of 511 kW to 1200 kW

Available components

• The Logamatic 4211, 4212, 4311 and 4312 control

units in a modular design

• Pressure-jet oil and gas burners

• Drilled burner plates onto which the pressure-jet gas

and oil burners are mounted

• Numerous matching accessories (Æ page 56 ff.)

6 720 644 097-60.1il

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2.2 Thermostream technology of the Ecostream cast iron boilers

2.2.1 Function principle

Thermostream technology is based on the mixing of cold

return water with hot flow water inside the boiler. Return

temperature raising takes place in the upper section of the

boiler. The return water therefore reaches a higher

temperature level before it flows to the heating surfaces.

A thermal shock to the heating surfaces is consistently

prevented, even if there is a sudden inflow of cold return

water.

No additional measures are required to raise the return

temperature or maintain a minimum flow rate under certain

operating conditions.

In steady operation, the surface temperatures on the hot

gas side are above the dew point of the hot gases. No

condensate is formed in the combustion chamber or

secondary heating surfaces. As a consequence,

corrosion inside the boiler is prevented.

The combustion chamber and heating surfaces receive a

flow of boiler water through natural circulation, and they

continually extract heating energy from the hot gas flow.

This results in high energy utilisation, stable operating

characteristics and simple hydraulic connections.

Thermostream technology means the boiler is

constructed with single-skin direct heating surfaces,

making it extremely compact.

Fig. 2 Thermostream technology taking the Ecostream cast iron boiler Logano GE515 as an example

VK Boiler flow

1 Boiler section with heating water channels

2 Combustion chamber

3 Secondary heating surfaces

4 Feed pipe for return water

6 720 644 097-01.1il

VK

1

2

3

4

2 Technical description

6 720 646 864 (12/2010) – Technical guide Logano GE315, GE515 and GE615

7

2.2.2 Structural features

Heating water routing

With the Ecostream cast iron boilers Logano GE315,

GE515 and GE615, the flow and return are arranged at

the back of the boiler, at the top. A special feed pipe is

integrated into the top hubs of the boiler sections, into

which cold return water flows. This construction provides

hydraulic separation of the flow and return water. For

every boiler section, there are generally two symmetrical

holes positioned at the sides of the feed pipe. A regulated

volume of return water is therefore supplied evenly to the

boiler sections (Æ Fig. 3)

Fig. 3 Large flow hub with feed pipe in the

Logano GE515

RK Return

VK Boiler flow

1 Combustion chamber

2 Water guide element

3 Top hub for flow water

4 Feed pipe for return water

The boiler water is heated by the inner heat transfer

surfaces (combustion chamber and secondary heating

surface) and rises. Colder water sinks at the external wall

and flows towards the inner heating surface (Æ Fig. 4).

Fig. 4 Functional diagram of heating water flow in the

Logano GE515

A water guide element is moulded into every boiler

section below the top hub. This means rising hot boiler

water is channelled around the feed pipe to the outside.

Inflowing return water mixes with the hot boiler water. The

injection effect improves the mixing. In this way, the

heating surfaces are shielded from the cold return water.

This type of boiler water flow results in even temperature

distribution inside the boiler. The result is significantly

reduced thermal stresses.

6 720 644 097-02.1il

VK

RK

4

3

2

1

6 720 644 097-03.1il

15 20 26 31 36 41 47 52 57 62 68 73 83 89 °C

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Hot gas routing

The Ecostream cast iron boilers Logano GE315, GE515

and GE615 are designed according to the 3-pass

principle with a burnout combustion chamber. The

geometry of the cast iron boiler sections results in precise

routing of the hot gas flow for optimum heat transfer. The

hot gases leave the combustion chamber by the back

boiler section, where they are re-routed to the front. They

then flow through the secondary heating surfaces of the

second hot gas flue. After being reversed again between

the front section and front door of the boiler, the gases

flow over the secondary heating surfaces of the third hot

gas flue to the flue outlet at the back of the boiler

(Æ Fig. 5). The oil or gas flame, especially with cleaner

burning pressure-jet oil and gas burners, can burn out

unhindered.

Fig. 5 Hot gas routing in the Logano GE515

1 Combustion chamber (first hot gas flue)

2 Secondary heating surfaces of the second hot gas flue

3 Secondary heating surfaces of the third hot gas flue

The 3-pass principle and the water-cooled combustion

chamber with direct heating surfaces offer ideal

conditions for low emissions. This is especially true in

conjunction with the advanced pressure-jet oil and gas

burners, which are matched to the boilers.

The secondary heating surfaces are arranged

symmetrically around the combustion chamber. Some of

them have hot gas baffle plates, which optimise the speed

of the hot gas flow. This creates more intensive heat

transfer to the boiler water. The result is a high standard

seasonal efficiency [to DIN] and low flue gas

temperatures.

If the flue system is not suitable for such low flue gas

temperatures, individual hot gas baffle plates or

turbulators can be removed from the secondary heating

surfaces. In this case, the flue gas temperatures would be

approx. 20 °C to 30 °C higher.

6 720 644 097-04.1il

1

2

3

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2.3 Dimensions and specification of the Ecostream cast iron boilers

2.3.1 Dimensions of the Logano GE315 cast iron boilers

Fig. 6 Dimensions of the Ecostream cast iron boilers and Ecostream cast iron boiler units Logano GE315

(dim. in mm)

1)

Fill the boiler and system via a separate connector on the

return pipe.

2)

See the latest “Prices and technology” catalogue for unit

versions with matching pressure-jet burners for operation

with fuel oil EL and natural gas E and LL.

6 720 644 097-05.1il

L

K

L

BR

2)

880

1035

450

1195

56

VK

RK

155

L

938

818

106

RK

DN 180

EL

1)

VK

Rp ¾

Boiler size Unit 105 140 170 200 230

Number of boiler

sections

N –56789

Length L

L

K

mm

1125

970

1285

1130

1445

1290

1605

1450

1765

1610

Handling Boiler section

Boiler block

mm

Width 712 / height 934 / depth 160

Width 712 / height 994 / length L

K

Combustion chamber Length

Ø

mm

790

400

950

400

1110

400

1270

400

1430

400

Burner door Depth mm 125 125 125 125 125

Boiler flow

Return

ØVK

ØRK

DN

Depending on the order, connection flange is DN 65 or

reduced from DN 65 to DN 50 or DN 40

Tab. 1 Dimensions of the Ecostream cast iron boilers and Ecostream cast iron boiler units Logano GE315

(specification

Æ

Tab. 3)

2 Technical description

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2.3.2 Dimensions of the Logano GE515 cast iron boilers

Fig. 7 Dimensions of the Ecostream cast iron boilers and Ecostream cast iron boiler units Logano GE515

(dim. in mm)

1)

Maximum value

2)

Fill the boiler and system via a separate connector on the

return pipe.

3)

See the latest “Prices and technology” catalogue for unit

versions with matching pressure-jet burners for operation

with fuel oil EL and natural gas E and LL.

80

L

K

L

BR

3)

980

1325

586

1556

144

VK

60

L

DN250

RK

585

DN 250

1120

EL

2)

Rp

¾

VK

1315

6 720 644 097-06.1il

270

115

270

1)

Boiler size Unit 240 295 350 400 455 510

Number of boiler sections N – 7 8 9 10 11 12

Length L

L

K

mm

1580

1360

1750

1530

1920

1700

2090

1870

2260

2040

2430

2210

Handling Boiler section

Boiler block

mm

Width 835 / height 1315 / depth 170

Width 835 / height 1315 / length L

K

Burner length With fuel oil L

BR

mm 480 480 645 500 500 645

Combustion chamber Length

Ø

mm

1190

515

1335

515

1505

515

1675

515

1845

515

2015

515

Burner door Depth mm 142 142 142 142 142 142

Boiler flow

Return

ØVK

ØRK

DN

Depending on the order, connection flange is reduced to

DN 100, DN 80 or DN 65

Tab. 2 Dimensions of the Ecostream cast iron boilers and Ecostream cast iron boiler units Logano GE515

(specification

Æ

Tab. 4)

2 Technical description

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11

2.3.3 Specification of the Ecostream cast iron boilers Logano GE315

2.3.4 Specification of the Logano GE515 cast iron boilers

Boiler size Unit 105 140 170 200 230

Rated output GE315 kW 105 140 170 200 230

Application range for heat

demand

GE315 kW 86–105 106–140 141–170 171–200 201–230

Rated heat input GE315 kW 92.1–113.5 113.5–151.4 151.0–183.4 183.1–215.1 215.2–247.9

Net weight

1)

1) Add the weight of the burner to the weight of the valve; weight incl. packaging is approx. 6 % to 8 % higher

kg 543 631 719 807 895

Water capacity (approximate) l 143 171 199 227 255

Gas content l 147 181 215 249 263

Flue gas temperature

2)

2) To EN 303; minimum flue gas temperature for chimney calculation to DIN-EN 13384-1 (Æ Tab. 42) (approx. 12 K lower)

Partial load

60 %

Full load

°C

137

162–185

138

154–182

136

161–180

132

158–176

141

168–190

Required draught Pa 0

Pressure drop on hot gas side GE315 mbar 0.28–0.41 0.46–0.79 0.71–1.30 1.34–1.78 1.32–1.77

Permissible flow temperature

3)

3) Safety limit (high limit safety cut-out); maximum flow temperature 18 K lower than safety limit (STB)

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

°C 120

Permissible operating pressure bar 6

Certificate no. acc. to Pressure

Equipment Directive

– Z-FDK-HUC-00-318-302-02

CE designation – CE-461 AS 255

Tab. 3 Specification of the Ecostream cast iron boilers and Ecostream cast iron boiler units Logano GE315

(dimensions

Æ

Fig. 6 and Tab. 1)

Boiler size Unit 240 295 350 400 455 510

Rated output GE515 kW 240 295 350 400 455 510

Application range for heat

demand

GE515 kW 201–240 241–295 296–350 351–400 401–455 456–510

Rated heat input GE515 kW 215.6–259.7 257.8–319.0 316.6–377.1 374.6–429.6 428.4–489.2 488.2–547.8

Net weight

1)

1) Add the weight of the burner to the weight of the valve; weight incl. packaging is approx. 6 % to 8 % higher

kg 1270 1430 1590 1753 1900 2060

Water capacity (approximate) l 258 294 330 366 402 438

Gas content l 421 487 551 616 681 745

Flue gas temperature

2)

2) Figures acc. to EN 303; minimum flue gas temperature for chimney calculation to DIN-EN 13384-1 (Æ Tab. 43) (approx. 12 K lower)

Partial load

60 %

Full load

°C

138

164–183

138

161–183

140

161–177

129

157–171

130

159–172

140

164–174

Required draught Pa 0

Pressure drop on hot gas side GE515 mbar 0.5–0.6 1.0–1.4 1.1–1.6 2.1–2.9 2.5–3.3 2.4–3.1

Permissible flow temperature

3)

3) Safety limit (high limit safety cut-out); maximum flow temperature 18 K lower than safety limit (STB)

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

°C 120

Permissible operating pressure bar 6

Certificate no. acc. to Pressure

Equipment Directive

– Z-FDK-HUC-00-318-302-04

CE designation – CE-0461 AR 6154

Tab. 4 Specification of the Ecostream cast iron boilers and Ecostream cast iron boiler units Logano GE515

(dimensions

Æ

Fig. 7 and Tab. 2)

2 Technical description

6 720 646 864 (12/2010) – Technical guide Logano GE315, GE515 and GE615

12

2.3.5 Dimensions and specification of the Logano GE615 cast iron boilers

Fig. 8 Dimensions of the Logano GE615 cast iron boilers and cast iron boiler units (dim. in mm)

1)

Maximum value

2

) Side control unit retainer

3)

Fill the boiler and system via a separate connector on the

return pipe.

4)

See the latest "Prices and technology" catalogue for unit

versions with matching pressure-jet burners for operation

with fuel oil EL and natural gas E and LL.

382

1)

2)

L

RK

DN 150

VK

1826

1595

350

125

750

1281

1365

EL

3)

160

Rp

¾

DN 360

750

VK

1637

L

BR

4)

6 720 644 097-07.1il

Boiler size Unit 570 660 740 820 920 1020 1110 1200

Number of boiler sections N –9 10111213141516

Length L

L

K

mm

1926

1804

2096

1974

2266

2144

2436

2314

2606

2484

2776

2654

2946

2824

3116

2994

Combustion chamber Length

Ø

mm

1525

680

1695680 1865

680

2035

680

2205

680

2375

680

2545

680

2715

680

Handling Boiler section

Boiler block

mm

Width 1096 / height 1640 / depth 170

Width 1096 / height 1640 / Length L

K

Burner door Depth mm 145 145 145 145 145 145 145 145

Boiler flow ØVK DN Depending on the order, connection flange is DN 150 or reduced from DN 150 to DN 125

or DN 100

Return Ø RK DN Depending on the order, connection flange is DN 150 or reduced from DN 150 to DN 125

or DN 100

Rated output kW 570 660 740 820 920 1020 1110 1200

Application range for heat

demand

from

to

kW

511

570

571

660

661

740

741

820

821

920

921

1020

1021

1110

1111

1200

Rated heat input from

to

kW

546.5

616.2

610.7

713.5

707.0

800.0

792.5

886.5

878.1

994.6

985.0

1102.0

1092.0

1200.0

1188.0

1297.0

Net weight

1)

1) Weight incl. packaging is approx. 6 % to 8 % higher

kg 2505 2747 2990 3232 3475 3710 3953 4147

Water capacity

(approximate)

l 561 621 681 741 801 861 921 981

Gas content l 922 1027 1132 1237 1342 1447 1552 1657

Flue gas temperature

2)

2) Figures acc. to EN 303; minimum flue gas temperature for chimney calculation to DIN-EN 13384-1 (Æ Tab. 43) (approx. 12 K lower)

Partial load

60 %

Full load

°C

140

170–180

Required draught Pa 0

Pressure drop on hot gas side mbar 2.4 3.4 4.2 4.2 4.1 4.5 5.4 5.8

Permissible flow temperature

3)

3) Safety limit (high limit safety cut-out); maximum flow temperature 18 K lower than safety limit (STB)

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

°C 120

Permissible operating pressure bar 6

Certificate no. acc. to Pressure Equipment

Directive

– Z-FDK-HUC-00-318-302-04

CE designation – CE 61 AS 255

Tab. 5 Dimensions and specification of the Logano GE615 cast iron boilers and cast iron unit boilers

2 Technical description

6 720 646 864 (12/2010) – Technical guide Logano GE315, GE515 and GE615

13

2.4 Parameters of the Ecostream cast iron boilers

2.4.1 Pressure drop on the water side

The pressure drop on the water side is the pressure

differential between the flow and return connections. It

depends on the boiler size and the heating water flow

rate.

Logano GE315

Fig. 9 Pressure drop on the water side of the

Ecostream cast iron boilers and Ecostream cast

iron boiler units Logano GE315

Δp

H

Pressure drop on the heating water side

V

H

Heating water flow rate

a Boiler size 105 kW

b Boiler size 140 kW

c Boiler size 170 kW

d Boiler size 200 kW

e Boiler size 230 kW

Logano GE515

Fig. 10 Pressure drop on the water side of the

Ecostream cast iron boilers and Ecostream cast

iron boiler units Logano GE515

Δp

H

Pressure drop on the heating water side

V

H

Heating water flow rate

a Boiler size 240 kW

b Boiler size 295 kW

c Boiler size 350 kW

d Boiler size 400 kW

e Boiler size 455 kW

f Boiler size 510 kW

Δp

H

[mbar]

100

10

1

123451020304050

[m

3

/h]

V

H

6 720 644 097-08.1il

a

c

d e

b

100

10

1

51020304050

6 720 644 097-09.1il

[m

3

/h]

V

H

Δp

H

[mbar]

a

b

c

d

e

f

2 Technical description

6 720 646 864 (12/2010) – Technical guide Logano GE315, GE515 and GE615

14

Logano GE615

Fig. 11 Pressure drop on the water side for Ecostream

cast iron boilers and Ecostream cast iron boiler

units Logano GE615

Δp

H

Pressure drop on the heating water side

V

H

Heating water flow rate

a Boiler size 570 kW

b Boiler size 660 kW

c Boiler size 740 kW

d Boiler size 820 kW

e Boiler size 920 kW

f Boiler size 1020 kW

g Boiler size 1100 kW

h Boiler size 1200 kW

100

50

10

10 20 4030 50 100

6 720 644 097-10.1il

[m

3

/h]

V

H

Δp

H

[mbar]

a b c d e f g h

2 Technical description

6 720 646 864 (12/2010) – Technical guide Logano GE315, GE515 and GE615

15

2.4.2 Boiler efficiency

The boiler efficiency describes the ratio of rated output to

rated heat input. It is shown subject to the average boiler

water temperature.

Logano GE315

Fig. 12 Boiler efficiency of the Ecostream cast iron

boilers and Ecostream cast iron boiler units

Logano GE315, subject to the average boiler

water temperature

Logano GE515

Fig. 13 Boiler efficiency of the Ecostream cast iron

boilers and Ecostream cast iron boiler units

Logano GE515, subject to the average boiler

water temperature

Logano GE615

Fig. 14 Boiler efficiency of the Ecostream cast iron

boilers and Ecostream cast iron boiler units

Logano GE615, subject to the average boiler

water temperature

Key to Fig. 12, Fig. 13 and Fig. 14:

ϑ

K

Average boiler water temperature

η

K

Boiler efficiency

a1 Boiler efficiency at stage 1

(partial load here approx. 60 % of rated output)

a2 Boiler efficiency at stage 2 (full load)

η

K

[%]

20 30 40 50 60 70 80

90

91

92

93

94

95

96

ϑ

K

[°C]

6 720 644 097-11.1il

a

1

a

2

20 30 40 50 60 70 80

6 720 644 097-12.1il

ϑ

K

[°C]

η

K

[%]

90

91

92

93

94

95

96

a

1

a

2

20 30 40 50 60 70 80

η

K

[%]

90

91

92

93

94

95

96

6 720 644 097-13.1il

ϑ

K

[°C]

a

1

a

2

2 Technical description

6 720 646 864 (12/2010) – Technical guide Logano GE315, GE515 and GE615

16

2.4.3 Flue gas temperature and boiler efficiency

The flue gas temperature is the temperature measured

inside the flue pipe, specifically at the boiler flue outlet. It

is shown subject to the boiler load.

Logano GE315

Fig. 15 Flue gas temperatures and boiler efficiency of

the Ecostream cast iron boilers and Ecostream

cast iron boiler units Logano GE315, at an

average boiler water temperature of 70 °C

Logano GE515

Fig. 16 Flue gas temperatures and boiler efficiency of

the Ecostream cast iron boilers and Ecostream

cast iron boiler units Logano GE515, at an

average boiler water temperature of 70 °C

Logano GE615

Fig. 17 Flue gas temperatures and boiler efficiency of

the Ecostream cast iron boilers and Ecostream

cast iron boiler units Logano GE615, at an

average boiler water temperature of 70 °C

Key to Fig. 15, Fig. 16 and Fig. 17:

ϑ

A

Flue gas temperature

η

K

Boiler efficiency

ϕ

K

Boiler load

a Flue gas temperature

b Boiler efficiency

ϕ

K

[%]

10010

0

80

85

90

95

100

20

30 40 50 60 70 80 90

ϑ

A

[°C]

190

170

150

130

110

90

70

6 720 644 097-14.1il

η

K

[%]

a

b

10010

0

80

85

90

95

100

20

30 40 50 60 70 80 90

190

170

150

130

110

90

70

6 720 644 097-15.1il

ϕ

K

[%]

η

K

[%]

ϑ

A

[°C]

a

b

100

200

150

100

50

0

10

0

90

91

92

93

94

95

96

97

98

20

30 40 50 60 70 80 90

6 720 644 097-16.1il

η

K

[%]

ϑ

A

[°C]

ϕ

K

[%]

a

b

2 Technical description

6 720 646 864 (12/2010) – Technical guide Logano GE315, GE515 and GE615

17

2.4.4 Standby loss and flue gas temperature

The standby loss is part of the rated heat input that is

required to achieve the specified boiler water

temperature.

The cause of this loss is the cooling down of the boiler

through radiation and convection during the standby time

(burner idle time). Radiation and convection result in part

of the output being transferred continuously from the

boiler surface to the ambient air. In addition to this surface

loss, the boiler can also cool down to a lesser degree

through the chimney draught.

Logano GE315

Fig. 18 Standby loss and flue gas temperature of the

Ecostream cast iron boilers and Ecostream cast

iron boiler units Logano GE315, subject to the

average boiler water temperature

Key to Fig. 18, Fig. 19 and Fig. 20:

ϑ

A

Flue gas temperature

ϑ

K

Average boiler water temperature

q

B

Standby loss

a

1

Flue gas temperature at stage 1

(partial load here approx. 60 % of rated output)

a

2

Flue gas temperature at stage 2, full load

b Standby loss

Logano GE515

Fig. 19 Standby loss and flue gas temperature of the

Ecostream cast iron boilers and Ecostream cast

iron boiler units Logano GE515, subject to the

average boiler water temperature

Logano GE615

Fig. 20 Standby loss and flue gas temperature of the

Ecostream cast iron boilers and Ecostream cast

iron boiler units Logano GE615, subject to the

average boiler water temperature

8035

30

0

0,1

0,2

0,3

0,4

0,5

0,6

40

45 50 55 60 65 70 75

200

180

160

140

120

ϑ

A

[°C]

ϑ

K

[°C]

q

B

[%]

6 720 644 097-17.1il

a

2

b

a

1

80

30

0

0,2

0,1

0,3

0,4

40

45 50 55

120

140

160

180

200

60 65 70 75

q

B

[%]

ϑ

A

[°C]

35

6 720 644 097-18.1il

a

2

b

a

1

ϑ

K

[°C]

80

20

0

0,05

0,10

0,15

0,2

30 40 50 60 70

200

180

160

140

120

a

2

b

a

1

6 720 644 097-19.1il

q

B

[%]

ϑ

A

[°C]

ϑ

K

[°C]

3 Burner

6 720 646 864 (12/2010) – Technical guide Logano GE315, GE515 and GE615

18

3 Burner

3.1 Matching pressure-jet oil or gas

burners for cast iron boiler units

To make engineering and installation easier, the cast iron

boilers are available as units. For the Logano GE315

series as a unit version, the Logatop VM pressure-jet gas

premix burner is available.

Logatop VM gas premix burner

Fig. 21 Logatop VM gas premix burner

Fully automatic modulating gas premix burner for natural

gas E and LL, with variable speed combustion air fan,

equipped as standard with dual solenoid valve and digital

burner control unit with diagnostic display.

At the factory, the burner is fitted to the burner door,

preset and tested at operating temperature, making it

ready for immediate operation.

No additional silencing measures are required due to the

low sound emissions from the pressure-jet gas premix

burner, so it is ideal for residential buildings.

Pressure-jet oil and gas burners

For the Logano GE315, GE515 and GE615 series as a

unit version, matching 2-stage pressure-jet burners for

fuel oil EL and natural gas E and LL are available.

3.2 General requirements

The pressure-jet oil burners must be type-tested in

accordance with the requirements of DIN-EN 267; the

pressure-jet gas burners in accordance with DIN-EN 676.

Observe the requirements for oil and gas combustion

equipment, as well as the applicable guidelines and

regulations.

When combining a boiler with a burner, check whether

the burner manufacturer's requirements with regard to the

combustion chamber geometry are fulfilled for the

selected boiler.

3.3 Information on burner selection

The burner must reliably overcome the boiler pressure

drop on the hot gas side. With gas combustion, ensure

that the local gas network can provide the required supply

pressure for the burner.

The burner head is equipped subject to the burner

manufacturer's stipulations.

See the latest Buderus “Prices and

technology” catalogues for unit versions with

matching pressure-jet burners for operation

with fuel oil EL and natural gas E and LL. The

standard delivery includes the boiler, burner

and drilled burner plates.

6 720 644 097-20.1il

To select the optimum boiler/burner

combination, you can also contact your local

Buderus sales office.

3 Burner

6 720 646 864 (12/2010) – Technical guide Logano GE315, GE515 and GE615

19

3.4 Available drilled burner plates

A burner plate drilled for installation of the right burner is

available as additional equipment (Æ Tab. 6).

Alternatively, the holes can be drilled on site in the burner

plate supplied.

In the unit version with pressure-jet burner for fuel oil EL

and natural gas E and LL, the burner plate is part of the

standard delivery.

Drilled burner plates available for the Ecostream cast iron boilers Logano GE315 and GE515

Logano

Drilled burner plate

Dimensions

Flame tube

hole

D

Hole circle

diameter

K

Threaded

holes in the

hole circle

Product no. Burner plate type

[mm] [mm] [mm]

GE315

(all boiler

sizes)

270 × 270 × 10 140 170 M 8/M 10 5431 312 C

270 × 270 × 10 160 200/230

1)

1) Double hole circle

M 10 5431 315 A

270 × 270 × 10 160 224 M 8 63026 868 A

270 × 270 × 10 165 186 M 10 7057 648 A

GE515

(all boiler

sizes)

320 × 320 × 10 140 170 M 8 5330 330 B

320 × 320 × 10 160 224 M 8 63026 869 B

320 × 320 × 10 165 186 M 10 5330 340 B

320 × 320 × 10 185 210 M 10 63245 020 B

320 × 320 × 10 185 300 M 12 63026 870 B

320 × 320 × 10 195 230 M 10 5330 350 B

320 × 320 × 10 210 235 M 10 5330 360 B

Tab. 6 Drilled burner plates available for the Ecostream cast iron boilers Logano GE315 and GE515

B

C

A

M8

M10

M8

M10

M8

K

D

K

D

K

D

6 720 644 097-21.1il

3 Burner

6 720 646 864 (12/2010) – Technical guide Logano GE315, GE515 and GE615

20

Drilled burner plates available for the Ecostream cast iron boiler Logano GE615

Logano

Drilled burner plate

Flame tube

hole

D

Hole circle

diameter

K

1

Hole circle

diameter

K

2

Threaded

holes in the

hole circle

Product

no.

Burner plate type

[mm] [mm] [mm]

GE615

(all boiler

sizes)

300 340 406 M 12 7057 646 A

195 230 270 M 10/M 12 63008 480 E

210 235 – M 10 63000 992 B

270 298 – M 12 63004 220 B

185 210 – M 10 63004 143 C

215 240 – M 12 63004 147 D

210 230 – M 10 63004 150 C

260 310 – M 12 63004 151 C

165 186 – M 10 63004 152 C

195 300 – M 12 63004 154 C

230 280 – M 12 7057 634 C

225 270 – M 12 7057 640 C

Tab. 7 Drilled burner plates available for the Ecostream cast iron boiler Logano GE615

K

D

K

2

1

440

t=15

45°

B

A

K

D

440

t=15

45°

C

D

K

430

45°

D

K

430

60°

t=10

E

D

K

430

45°

t=10

K

M10

M12

6 720 644 097-22.1il

1

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