▶ Installation, gas and flue connection,
initial commissioning, electrical
connections and annual maintenance
must only be carried out by a trained
and certified installer.
▶ Keep the combustion air free of
corrosive substances (halogenated
hydrocarbons that contain chlorine or
Never shut off safety valves!
▶ Water may escape from the safety
valve at any time when the water is
▶ Servicing and repairs may only be
carried out by a trained and certified
▶ Immediately correct all faults to
prevent system damage.
▶ Use only Bosch spare parts!
Instruct the customer
▶ Explain to the customer how the
appliance works and how to operate
▶ Inform the customer that he/she must
not carry out any alterations or
Greentherm T9900 SE/i – 6 720 813 635 (2019/03)
Key to symbols and safety instructions
Risk of electric shock!
▶ Ensure that only an authorized
contractor performs electrical work.
▶ Before performing electrical work,
disconnect the power and secure the
unit against unintentional
▶ Ensure the system has been
disconnected from the power supply.
Risk of scalding at the hot water
▶ When the water heater is in operation,
temperatures in excess of 120 °F
(49 °C) can occur. To limit the
temperature at the tap, install a
thermostatic DHW mixing valve.
▶ Water heated for washing the laundry,
dishes and for other cleaning
purposes can cause scalding and
▶ Children, disable and elderly are at
highest risk of being scalded. Never
leave such individuals in the tub or
shower unattended under any
circumstances. Children must not be
allowed to operate hot water faucets