Bosch DHW Tank QWST120 O Installation And Maintenance Instructions Manual page 4

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Key to symbols and safety instructions
Installation and operation
B Have the appliance installed only by a qualified
contractor.
B Ensure that the hot water tank is completely full prior
to start up.
B To prevent damage from excess pressure, never
disable the safety valves.
B Water may escape from the safety valve when water is
being heated. Ensure that the safety valve is piped to
within 6 inches of the ground in an area where
property damage will not occur.
B Install the unit only in a frost-free room.
B Never store or place combustible material or liquids
near the appliance.
B Maintain safe clearances in accordance with local/
national regulations.
Risk of fatal injury from electric shock
B If an aquastat is used with line voltage, it must be
connected by a licensed electrician. The terminal
wiring diagram must be followed.
B Before carrying out any work, isolate all phases of the
electrical power using the emergency shut-off switch
or by disengaging the heating system circuit breaker.
Secure against unintentional reconnection.
B Do not install this device in rooms with a high
moisture level (e.g. bathrooms, saunas).
Inspection/maintenance
B Recommendation: sign a maintenance and inspection
contract with a qualified heating contractor and have
the appliance serviced annually.
B The owner/operator is responsible for the safety and
environmental compatibility of the system.
B Read and follow the safety instructions in the
"Cleaning and maintenance" chapter.
Original spare parts
Damage caused by spare parts not supplied by the
manufacturer are excluded from our warranty.
B Use only original spare parts and accessories from
the manufacturer.
Frost damage
B When there is a risk of frost, drain the water from the
DHW tank and the heating system's pipework. The
system is protected from frost only if it is completely
dry.
4
Instructing the owner/operator
B Instruct the owner/operator in the functionality and
operation of the appliance.
B Inform the owner/operator that they must never carry
out any modifications or repairs.
B Inform the owner/operator that children
unsupervised by adults should never be in the vicinity
of the heating system.
B Complete the commissioning report in this document
and hand it over to the owner/operator.
B Give the technical documentation to the owner/
operator.
Disposal
B Dispose of packaging in an environmentally
responsible manner.
B Dispose of the appliance correctly at an authorized
disposal site.
Cleaning
B Clean the outside of the appliance with a damp cloth.
6 720 648 071 (2012/03)

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