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