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6 | Product Description
SB625WS/SB745WS6 720 805 218 (2016/02)
2.1 Intended use
This boiler must only be used for the purpose specified by the
manufacturer and for which it is designed.
The SB625WS/SB745WS can be operated with gas, oil, and
combination burners. For a list of the approved burners, please contact
Bosch Thermotechnology Corp.
The boiler can be operated with an aquastat, the Logamatic 4000, and
other control systems.
The manufacturer declines all responsibility, contractual or other, for
damage to property or injury to persons or animals caused by improper
installation, adjustment, maintenance or use.
2.2 Certification and testing mark
This appliance has been tested and certified and meets all applicable
standards for the US and Canadian markets:
CSA-AM 3.1 Industrial and commercial gas-fired package boilers
CSA B140.0 General requirements for oil burning equipment
CSA B140.2.1-10 Atomizing-type oil burners
CSA B140.7-05 Oil-burning equipment - steam and hot water boilers
UL 296 Standard for oil burners
UL 726 Standard for oil-fired boiler assemblies
UL 795 Standard for commercial industrial gas heating equipment
2.3 Regulations and Guidelines
2.3.1 National regulation
The heating system must comply with the requirements of the relevant
regulatory authorities or otherwise of the National Fuel Gas Code, ANSI
Z 223.1 In Canada, the requirements of CAN/CGA-B.149.1 and 2, or
CAN/CGA-B.139 must be observed.
If specified by the relevant regulatory authorities, the heating system
must comply with the regulations of the Standard for Controls and
Safety Devices for Automatically Fired Boilers, ANSI/ASME CSD-1.
Carbon monoxide detectors must be installed as specified by the local
regulations. The boiler must be serviced annually.
2.3.2 Compliance with standards and regulations
Installation of the boiler must comply with all applicable codes and
regulations imposed by the national, Federal or local authorities and
bodies. If no specific requirements are defined, in the USA, the latest
edition of the National Fuel Gas Code ANSI Z223.1/NFPA 54 must be
complied with.
In Canada, installation must comply in all respects with the latest edition
of the Natural Gas and Propane Installation Code, CAN/CGA-B. 149, the
Installation Code for Oil Burning Equipment, CAN/CGA-B. 139 and the
applicable local regulations and requirements for the appliance
category. The relevant authorities and regulatory bodies must be
informed before installation starts.
Where required by local regulations, the system must comply with the
American Society of Mechanical Engineers Safety Code for Controls and
Safety Devices for Automatically Fired Boilers (ASME CSD-1).
The local regulations regarding minimum pressure detectors and low-
water safety cutouts must be observed. Installation and operation must
comply with the device manufacturer‘s technical documentation.
We recommend fitting an 80 mesh dirt filter externally to the boiler
return to prevent contamination of the boiler by the water source.
Leak test
A leak test must be carried out. The testing pressure is based on the
normal operating pressure of the heating system and should be 1.3
times that pressure, and in any case no less than 14 psi (1 bar).
Safety limits
2.3.3 Additional regulations for installations in the
Commonwealth of Massachusetts
(a) For all side wall horizontally vented gas fueled equipment installed in
every dwelling, building or structure used in whole or in part for
residential purposes, including those owned or operated by the
Commonwealth and where the side wall exhaust vent termination is less
than seven (7) feet above finished grade in the area of the venting,
including but not limited to decks and porches, the following
requirements shall be satisfied:
INSTALLATION OF CARBON MONOXIDE DETECTORS. At the time of
installation of the side wall horizontal vented gas fueled equipment,
the installing plumber or gasfitter shall observe that a hard wired
carbon monoxide detector with an alarm and battery back-up is
installed on the floor level where the gas equipment is to be installed.
In addition, the installing plumber or gasfitter shall observe that a
battery operated or hard wired carbon monoxide detector with an
alarm is installed on each additional level of the dwelling, building or
structure served by the side wall horizontal vented gas fueled
equipment. It shall be the responsibility of the property owner to
secure the services of qualified licensed professionals for the
installation of hard wired carbon monoxide detectors.
In the event that the side wall horizontally vented gas fueled
equipment is installed in a crawl space or an attic, the hard wired
WARNING: Risk of fatal Injury from explosion of
flammable gases!
Installation, connection of the fuel supply and flue
pipe, commissioning, connection of the electrical
power supply, servicing and repair may only be
carried out by an authorized heating engineer.
Any work on gas-carrying components may only be
carried out by an authorized gas installer.
The details on the boiler rating plate are definitive and
must be observed.
Safety limits Value
Maximum allowable temperature: 230 °F (110 °C)
Maximum operating temperature 210 °F (98.8 °C)
Permissible operating pressure: 80 psi (5.5 bar)
Maximum cycle time for safety
temperature limiter:
40 s
Maximum cycle time for
temperature control:
40 s
Table 2 Safety limits
6


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