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Heat is our elementHeat is our element
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
4
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
6 720 646 864 (12/2010) – Technical guide Logano GE315, GE515 and GE615
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
2 Technical description
6 720 646 864 (12/2010) – Technical guide Logano GE315, GE515 and GE615
6
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
2 Technical description
6 720 646 864 (12/2010) – Technical guide Logano GE315, GE515 and GE615
8
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
2 Technical description
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9
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
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
mm
1125
970
1285
1130
1445
1290
1605
1450
1765
1610
Handling Boiler section
Boiler block
mm
mm
Width 712 / height 934 / depth 160
Width 712 / height 994 / length L
K
Combustion chamber Length
Ø
mm
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
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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10
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
mm
1580
1360
1750
1530
1920
1700
2090
1870
2260
2040
2430
2210
Handling Boiler section
Boiler block
mm
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
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
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
°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
°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
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
mm
1926
1804
2096
1974
2266
2144
2436
2314
2606
2484
2776
2654
2946
2824
3116
2994
Combustion chamber Length
Ø
mm
mm
1525
680
1695680 1865
680
2035
680
2205
680
2375
680
2545
680
2715
680
Handling Boiler section
Boiler block
mm
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
kW
511
570
571
660
661
740
741
820
821
920
921
1020
1021
1110
1111
1200
Rated heat input from
to
kW
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
°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
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
2
1
440
440
t=15
45°
B
A
K
D
440
440
t=15
45°
C
D
K
430
430
45°
D
D
K
430
430
60°
t=10
t=10
E
D
K
430
430
45°
t=10
K
M10
M12
6 720 644 097-22.1il
1
1
1
1
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