SB Series Stainless Steel Condensing Boilers
2 | Buderus SB Series Stainless Steel Condensing Boilers
Bosch introduces the SB line of stainless steel commercial condensing boilers.
The SB Series by Bosch.
Introducing the SB Series.
The SB series of high-efficiency condensing boilers feature
design flexibility for retrofit and new construction projects.
The high mass design is tailored to fully meet space heating
retrofit applications. This series can be used with multiple
fuels including natural gas, LPG or diesel.
The boiler insulation comes pre-installed and convenient top
connections allow easy access to piping for reduced
installation effort. Project costs are reduced due to
simplified piping – a high water content heat exchanger
requires no minimum flow rate, which eliminates the need
for a costly dedicated boiler circulator.
Condensing Boiler Technology
Condensing boiler technology is the most efficient,
environmentally friendly form of fuel heating available today.
Condensing technology recovers the condensation heat
retained latently in flue gases — part of the energy that
normally disappears up the chimney in other heating
systems. Thanks to lower fuel consumption and lower
heating costs, condensing boilers usually pay for themselves
in only 2 to 5 years.
Additionally, a modern condensing heating system increases
the value of the building as well as quality of life by reducing
emissions. Condensing technology offers an intelligent, easy-
to-install solution to rising fuel costs.
New from Bosch SB series condensing gas commercial boilers - perfect for large applications. Bosch is a global innovator providing sustainable business partnerships based on trust, values and quality.
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Condensing Technology Improves Energy Utilization By Up To 15%
With condensing technology, the water vapor contained in the flue gases
condenses on the cooler heat exchanger surfaces of the boiler, transferring heat
into the boiler water. Large heat-transfer surfaces, a counter-flow heat exchanger
design, and cold return water temperatures together optimize condensation
opportunities.
The secondary heating surfaces are long and extremely large in order to ensure
optimal heat transfer and a high degree of condensation.
The heat released from condensation is transmitted directly into the boiler water,
minimizing thermal flue gas losses. The seasonal efficiency of the SB Series
Condensing Boilers can reach up to 98%, reducing heating costs by up to 20% in
comparison with conventional heating
Reduced installation cost and complexity: 3 Top connections for easy access to piping3 Pre-installed boiler insulation3 One package for the jacket pack 3 Same base construction of all models 3 Simple piping, no primary/secondary piping
with extra circulator needed
Increased opportunities for specifying3 Pressure rating up to 6 bar3 Output range 160kW to 1550kW3 Multi fuel options available: NG, LPG, Diesel Oil3 Comprehensive Bosch controls program
Boiler E�ciency Curves
21 27 32 38
Return Water Temperature (C)
43 49 54 60 66 71 77
Boiler Efficiency Curves
4 | Buderus SB Series Stainless Steel Condensing Boilers
Flexible high mass design for retrofit and new construction projects.
Multiple Return ConnectionsLow & medium temperature return connections create maximum heat transfer along the second and third flue passes increasing over-all boiler efficiency.
A modulating burner and two return-water connections ensure
high energy efficiency & low pollutant emissions.
The SB Series Condensing Boilers have more than exemplary
economy to offer. Equipped with a two-stage or modulating forced-
draft burner, they achieve extremely low pollutant emissions. High
and low temperature heating circuit returns to the boiler should be
connected separately to achieve higher efficiencies and higher
rates of condensation. Bosch condensing boilers are equipped with
two return water connections, which allow for separate return
flows and optimal efficiencies.
When return-flow temperatures below the dew point of combustion
gases are reduced further, even more heat is reclaimed from the
flue products. In the SB Series, low flue gas temperatures are
ensured by low return water flow temperatures, highly efficient
heat exchanger surfaces, two-stage or full modulating burners,
and continuous operation. SB Series condensing boilers are ideally
suited for direct piping in commercial systems to make maximum
use of low return water temperatures. Direct piping reduces
complexity, and installation and maintenance costs.
316Ti AdvantageThe titanium infused
stainless steel heat exchanger is designed
for greater strength and longer service life
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Bosch is a long-standing, reliable business partner delivering support, products and accessories to the market. Work with one manufacturer for coverage of the entire output range.
Operating features and benefits:3 Inexpensive installation with comprehensive equipment and
simple system technology3 Large, full-swing openings of the main combustion chamber and
fire tube heating surface assure easy inspection and service.3 No operational requirement with regard to water flow, minimum
return temperature or temperature rise through the boiler.3 The heating circuit flow and low temperature return flow can be
connected without any additional equipment, e.g. flow monitors or shunt pumps.
3 Smaller circulators for lower electrical consumption3 Larger delta T’s for improved efficiency
Robotic Welding for precision, reliability
and durability
6 | Buderus SB Series Stainless Steel Condensing Boilers
Technical SpecificationsBosch SB625WS Series
SB625WS Model 160 220 290 370 480 640
Performance Data (Unit of Measure)
Maximum Burner Output (kW) 150 210 270 349 450 600
Maximum Boiler Output (kW) 50/30 Gas 159.8 223.7 287.6 371.7 479.3 639
Maximum Boiler Output (kW) 80/60 Gas 144.9 203.3 265.1 339.9 436.5 582.0
Effeciency at 50/30 Gas 106.5 106.5 106.5 106.5 106.5 106.5
Effeciency at 80/60 Gas 96.6 96.6 96.6 96.6 96.6 96.6
General Data (Unit of Measure)
Boiler category Condensing
Heat exchanger construction Stainless steel
Heating surface (m2) 6.1 8.8 13.0 16.3 21.8 28.8
Maximum allowable working pressure (bar) 6 6 6 6 6 6
Water content (litre) 323 360 495 555 743 770
Weight - dry (kg) 559 579 737 823 1,185 1,370
Weight - shipping (kg) 612 626 798 885 1,315 1,497
Operational Data (Unit of Measure)
Minimum flow rate (LPM) none
Maximum flow rate (LPM) none
Maximum supply water temperature (°C) 99
Minimum return water temperature (°C) none
Boiler Dimensions Data (Unit of Measure)
A Base width (mm) 690 690 750 750 790 790
B Overall width (mm) 740 740 850 850 900 900
C Height of burner plate (center line) (mm) 925 925 1030 1030 1235 1235
D Flue depth (mm) 150 150 150 150 150 150
H Height of water fittings (mm) 1315 1315 1450 1450 1615 1615
H1 Boiler height (mm) 1300 1300 1437 1437 1615 1615
L Length (mm) 1455 1455 1630 1830 2035 2235
L1 Base Length (mm) 1295 1295 1470 1670 1875 2075
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Technical SpecificationsBosch SB745WS Series
L1
L
H
D
A
C
H1
B
FRONT VIEWNTS
RIGHT SIDE VIEWNTS
SB745WS Model 800 1050 1300 1550
Performance Data (Unit of Measure)
Maximum Burner Output (kW) 800 1000 1250 1450
Maximum Boiler Output (kW) 50/30 Gas 852 1065 1331 1544
Maximum Boiler Output (kW) 80/60 Gas 776 970 1215.5 1406.5
Effeciency at 50/30 Gas 106.5 106.5 106.5 106.5
Effeciency at 80/60 Gas 96.6 96.6 96.6 96.6
General Data (Unit of Measure)
Boiler category Condensing
Heat exchanger construction Stainless steel
Heating surface (m2) 39.6 46.5 56.2 62.28
Maximum allowable working pressure (bar) 6 6 6 6
Water content (litre) 1320 1395 1825 1900
Weight - dry (kg) 2010 2245 2730 3280
Weight - shipping (kg) 2191 2449 2989 3606
Operational Data (Unit of Measure)
Minimum flow rate (LPM) none
Maximum flow rate (LPM) none
Maximum supply water temperature (°C) 99
Minimum return water temperature (°C) none
Boiler Dimensions Data (Unit of Measure)
A Base width (mm) 950 950 1070 1130
B Overall width (mm) 1060 1060 1180 1225
C Height of burner plate (center line) (mm) 1390 1390 1495 1590
D Flue depth (mm) 150 150 150 150
H Height of water fittings (mm) 1900 1900 2030 2180
H1 Boiler height (mm) 1900 1900 2015 2167
L Length (mm) 2560 2810 3010 3080
L1 Base Length (mm) 2400 2650 2850 2850
Robert Bosch (Australia) Pty. Ltd.Thermotechnology Division 1555 Centre RoadClayton Victoria 3168F (03) 9541 5595Sales Hotline: 1300 30 70 37Sales Fax: 1300 30 70 38www.bosch-industrial.com.au
Distribution in Australia and New Zealand by:
RCR ENERGY SERVICEAUSTRALIA
Victoria 11 Howleys Road, Notting HillVIC 3168Ph: +61 3 9541 8600 I Fax: + 61 3 9544 8277
New South Wales 81 Warren Road, SmithfieldNSW 2164Ph: +61 2 9681 4177 I Fax: + 61 2 9681 1152
Queensland 35 Archimedes St, DarraQLD 4076Ph: +61 7 3259 6400 I Fax: + 61 7 3375 1368
RCR ENERGY SERVICE LOCATIONSWestern Australia 239 Planet Street Welshpool WA 6106Ph: +61 8 9455 5511 I Fax: + 61 8 8455 5593
South Australia 34 Croyden Road, KeswickSA 5035Ph: +61 8 8297 9688 I Fax: + 61 8 8297 3166
NEW ZEALANDAuckland 13E Volgar Drive, Manukau City Auckland NZ 2104 Ph: +64 9 250 1880 I Fax: + 64 9 250 1881
Weishaupt Burners and Combustion Management
The boilers are offered with exceptional quality burners from Weishaupt Germany. These fully modulating burners offer the highest levels of performance and lowest emissions for standard packaged equipment. The burner has an integrated digital Burner Management System (BMS) that eliminates cams and linkages, even on multi-fuels. This W-FM digital combustion manager was co-developed with Siemens, with many advantages including fault self-diagnosis, elimination of mechanical linkages for air/fuel ratio control and infra-red or UV self checking flame sensor.
The benefits include: 3 Exceptional high quality for enhanced reliability
3 High efficiency combined with the lowest emissions (CO and NOx)
3 High turndown capability
3 Digital Burner Management System (BMS) with clear fault messaging
3 Servo motors for air & fuel for precise repeatable combustion
3 Low noise operation
3 Optional Dual Fuel configuration (Diesel / Heavy Oils / Biogas)
3 Energy Saving options of VSD and O2 trim