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Product description
The oil/gas fired boiler SB625WS/SB745WS has been developed and
built employing the latest technologies and safety regulations.
Particular emphasis is placed on ease of operation. Please observe the
safety instructions and the operating instructions to ensure optimum
safe, economical and environmentally-friendly operation of your
system.
The main components of the SB625WS/SB745WS gas/oil fired boiler
are:
• Boiler block [3].
The boiler block transfers the heat generated by the burner to the
heating water.
• Boiler shell [1], thermal insulation [2].
The boiler jacket and thermal insulation minimize energy loss.
Fig. 1 Oil/gas fired boiler Buderus SB625WS/Buderus SB745WS
[1]
Boiler shell (jacket)
[2]
Thermal insulation
[3]
Boiler block
2.1
Correct use
The SB625WS/SB745WS is designed for heating boiler water and water
heating. Any other purpose is considered improper use. Any resulting
damage is excluded from the manufacturer's warranty.
The SB625WS/SB745WS can be operated with gas, oil, and
combination burners. For a list of the approved burners, please contact
Bosch Thermotechnology Corp. Required operating conditions of
allowable fuels may be found in the boiler installation manual.
The boiler can be operated with an aquastat, the Logamatic 4000, and
other control systems.
2.2
Certification and testing mark
This appliance has been tested and certified and meets all applicable
standards for the US and Canadian markets.
Stainless Steel Condensing Boiler - SB625WS / SB745WS
2.3
Data plate
Serial number plate
The serial number plate is located on the rear of the boiler block and
specifies the serial number and model.
Data plate
This lists the appliance's technical specifications and performance. The
data plate will be factory installed on the boiler side panel.
2.4
The correct fill and make-up water
1
Note the fundamental system-specific water quality requirements.
Water designation
Water is used as the heat transfer medium in your heating system.
Depending on its purpose, the water is given different descriptions.
• Heating water:
Water contained within your heating system.
• Fill water:
2
Water used for the first filling of your system before commissioning.
• Make-up water:
Water used for topping up the heating system in case of water loss.
Water quality requirements
All water contains substances, e.g. Ca (HCO
3
carbonate) that could affect the operation of your heating system. These
can cause corrosion, scale formation or deposits.
To ensure your heating system always operates economically, properly
and safely, not to mention in an energy-efficient manner, we require that
6 720 805 220-01.1T
you regularly monitor the quality of the fill and make-up water and treat
it accordingly as and when necessary.
If you contact the manufacturer with any questions about
this product, always provide the details on the data plate
and serial number plate. These details enable us to assist
you specifically and quickly.
If these plates or any other means of clearly identifying
the product are defaced, removed or lost, proper
installation and servicing may be difficult.
NOTICE: System damage from corrosion or scale
formation as the result of using fill and make-up water
that does not conform to the system-specific
requirements.
▶ Ask your trained and certified installer or local water
company what the concentration of Ca (HCO
(calcium hydrogencarbonate) is in your area.
▶ If the fill and make-up water does not meet system-
specific requirements, it will have to be treated.
Consult your trained and certified installer if this is the
case.
Product description | 5
)
(calcium hydrogen
3
2
)
3
2
6 720 805 220 (2012/10)
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