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1
Key to symbols and safety instructions
1 .1
Key to symbols
Warnings
Warnings in this document are identified by a warning
a
triangle printed against a grey background.
Keywords at the start of a warning indicate the type and
seriousness of the ensuing risk if measures to prevent the
risk are not taken.
The following keywords are defined and can be used in this document:
•
indicates a hazardous situation which, if not avoided, will
DANGER
result in death or serious injury.
•
indicates a hazardous situation which, if not avoided,
WARNING
could result in death or serious injury.
•
indicates a hazardous situation which, if not avoided,
CAUTION
could result in minor to moderate injury.
•
is used to address practices not related to personal injury.
NOTICE
Important information
This symbol indicates important information where there is
m
no risk to people or property.
1 .2
Safety instructions
Observe these instructions for your safety.
The burner and control must be correctly installed and adjusted to ensure
safe and economical operation of the gas boiler.
Read this installation and maintenance manual carefully and note the
details on the boiler nameplate before placing the boiler in operation.
Risk of fatal injury from explosion of flammable gases
If you smell gas there is a danger of explosion.
► Never work on gas lines unless you are licensed contractor / gas fitter.
► Make sure that a licensed contractor / gas fitter installs the boiler,
connects gas and vent, places the boiler in operation, connects the
electrical power, and maintains and repairs the boiler.
► No open flame! No smoking! Do not use lighters.
► Prevent spark formation. Do not operate electrical switches, including
telephones, plugs or door bells.
► Close main gas valve.
► Open doors and windows.
► Warn other occupants of the building, but do not use door bells.
► Call gas company from outside the building.
► If gas can be heard escaping, leave the building immediately, prevent
other people from entering, notify police and fire departments from
outside the building
Risk to life from electrical shock .
► Disconnect the power supply to the boiler heating system before
conducting any work on it, e.g. turn off the heating system emergency
switch outside the boiler room.
► It is not sufficient just to turn off the control.
► Do not carry out electrical work unless you are qualified for this type
of work.
► Before servicing disconnect electrical power and lock out to prevent
accidental reconnection.
SSB
Key to symbols and safety instructions | 3
► Observe and follow the local, state and federal installation regulations.
Risk of fatal injury from flue gas poisoning
Insufficient ventilation or combustion air availability may cause dangerous
flue gas leaks or formation.
► Make sure that inlets and outlets are not reduced in size or closed.
► If faults are not corrected immediately, the boiler must not be operated
until all faults have been corrected.
► Inform the system operator and/or owner of the fault and the danger
in writing.
When working on the flue gas venting equipment or vent damper leakage
of flue gases may endanger the lives of people.
► Carefully observe proper operation of the vent damper. Do not start up
the boiler unless the vent damper is operating properly.
► Use only original parts when replacing parts.
► When replacing the vent damper, install the new one in the specified
position.
Risk to life by poisoning by spillage of flue gases
► If the blocked vent switch trips frequently the fault must be corrected
and proper operation of the blocked vent switch test must be
conducted.
Risk to life by poisoning by leakage of flue gases
► Make sure that the boiler is not equipped with a thermally controlled
flue gas vent damper after the open draft hood.
Risk of fatal injury from neglecting your own safety in case of
emergency, such as with a fire
► Never put yourself at risk. Your own safety must always take priority.
Fire danger due to flammable materials or liquids
► Make sure that there are no flammable materials or liquids in the
immediate vicinity of the boiler.
► Maintain a minimum distance of 15 inches from the boiler.
Installation and maintenance
► Observe all current standards and guidelines applicable to the
installation and operation of the boiler heating system as applicable in
your state or local jurisdiction.
► Clean and service the boiler system once a year. Check that the
complete heating system operates correctly.
► Immediately correct all faults to prevent system damage.
► Only use original Bosch spare parts. Losses caused by the use of
parts not supplied by Bosch are excluded from the Bosch warranty.
1 .3
General warning
The installation must conform to the requirements of the authority having
jurisdiction or, in the absence of such requirements, to the latest edition
of the National Fuel Gas Code, ANSI Z223.1./NFPA 54. In Canada,
installation must be in accordance with the requirements of CAN/CSA
B149.1, Natural Gas and Propane Installation Code.
Where required by local, state and federal 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 hot water distribution system must comply with all applicable codes
and regulations. When replacing an existing boiler, it is important to check
the condition of the entire hot water distribution system to ensure safe
operation.
Valves external to the boiler must be fitted with T-handles and condensate
piping must be installed in accordance with the State Plumbing Code.
6720866942 (2018/06) US
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