Bosch ZWB28-3A SERIES Operating Instructions Manual page 8

8 | Explanation of symbols and safety instructions
HRisk of scalding
▶ If running at DHW temperatures above 104 °F
(40 °C) ask a trained and certified heating
contractor to install a tempering valve to prevent
scalding.
▶ When the thermal disinfection function is
enabled, DHW temperatures above 140 °F (60 °C)
can occur.
HRisk of damage due to operator error
Operator errors can result in personal injury and
damage to property.
▶ Ensure that children never operate this appliance
unsupervised or play with it.
▶ Ensure that only people who know to operate this
appliance correctly have access to it.
HInstallation, conversion
Only have the appliance installed or modified by a
trained and certified heating contractor.
Never modify any parts that carry flue gas.
Never close the outlet of safety valves. Water may be
expelled from any safety valve during heat-up.
Greenstar combi 100 p / 151 p 6720872363 (2017/04)